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Thermosetting resins are widely used in the composition of carbon fiber-reinforced polymers （CFRPs）， which are insoluble and non-melting after curing， making thermosetting resins and carbon fibers （CFs） difficult to recycle and reuse.Vitrimer has the advantages of thermosetting and thermoplastic resins， which can achieve high-performance CFRPs preparation and non-destructive recovery of CFs. Moreover， the construction of vitrimer and its CFRPs by the bio-based materials， such as lignin and vanillin， is in line with the green development concept. The methods， properties， and their applications for the preparation of bio-based vitrimer from lignin and vanillin were summarized in this paper； the applications of vanillin-based vitrimer in the recyclable CFRPs were reviewed； the future development of lignin/vanillin-based vitrimer and its CFRPs were outlooked. This paper would provide a reference for the construction of high-performance lignin and its derivative vitrimer and CFRPs.

Open-pit mine unmanned dump trucks face harsh transportation conditions, such as low-grade roads with numerous ramps and curves, as well as heavy and highly variable loads. Most existing vehicle motion control strategies are designed for conventional road environments, making them unsuitable for direct application to mine dump trucks. To address these issues, a lateral-longitudinal coordinated control system based on preview error and layered feedback was proposed for unmanned open-pit mine dump trucks. The lateral control was based on a linear quadratic regulator (LQR) and employed a feedforward controller to reduce steady-state errors, while a fuzzy controller was used to adaptively adjust the preview distance, thereby improving path tracking accuracy. The longitudinal control established a layered feedback longitudinal speed controller, which used model predictive control and fuzzy proportional-integral-differential (PID) feedback control. In addition, an inverse model for vehicle driving and braking was established to minimize the impact of load and road gradient changes on longitudinal speed tracking. Simulation results indicated that: ① The error between the actual speed and the desired speed was within 2%, demonstrating that the speed tracking performance of the dump truck could meet requirements under both empty downhill and fully loaded uphill conditions. ② Due to the lateral-longitudinal coordinated control’s ability to adjust vehicle speed in real time based on varying road curvature, the coordinated controller achieved higher path tracking accuracy compared to single lateral control in both operating conditions, while also enhancing vehicle maneuverability and stability. Laboratory test results showed that: ① The peak lateral error during empty downhill runs was 0.0199 m, and the peak direction error was 0.1840 rad. Both errors increased at curves, but their fluctuations were minimal, ensuring that the test vehicle effectively tracked the desired path. ② During loaded uphill runs, the peak lateral error was 0.0168 m, and the peak direction error was 0.0714 rad. The error trends were opposite to those observed in empty downhill tests, but the errors remained within acceptable limits, resulting in good path tracking performance. ③ Both peak errors were lower compared to those in empty downhill tests, which validated the effect of varying speeds on lateral control accuracy.

To extract and transport the residual heat from mine return air over long distances, and considering the high moisture content and large volume of return air, along with the heat transfer theory of heat pipe systems, this paper designs a gravity-type split heat pipe air supply system for mine return air heat recovery. This system can transfer the recovered low-temperature residual heat to the mine's fresh air platform for preheating, meeting the anti-freezing heat demand at the mine shaft entrance and successfully realizing the extraction of low-temperature heat sources for industrial application. Through continuous three-day testing of certain heat exchange modules, the results show that the system can raise the temperature of low-temperature fresh air by 12℃ to 16.5℃, achieving the goal of preventing freezing at the shaft entrance. These findings demonstrate practical industrial application value.

In this article, we first introduce a new fractional gg-Laplacian Monge-Ampère operator: Fgsv(x)≔infP.V.∫Rngv(z)−v(x)∣C−1(z−x)∣sdz∣C−1(z−x)∣n+s∣C∈C,{F}_{g}^{s}v\left(x):= \inf \left\{\hspace{0.1em}\text{P.V.}\hspace{0.1em}\mathop{\int }\limits_{{{\mathbb{R}}}^{n}}g\left(\frac{v\left(z)-v\left(x)}{{| {C}^{-1}\left(z-x)| }^{s}}\right)\frac{{\rm{d}}z}{{| {C}^{-1}\left(z-x)| }^{n+s}}| C\in {\mathcal{C}}\right\}, where gg is the derivative of a Young function and the diagonal matrix C{\mathcal{C}} is positive definite, which has a determinant equal to 1. First, we establish some crucial maximum principles for equations involving the fractional gg-Laplacian Monge-Ampère operator. Based on the maximum principles, the direct method of moving planes is applied to study the equation involving the fractional gg-Laplacian Monge-Ampère operator. As a result, the nonexistence of the positive solutions, symmetry, monotonicity, and asymptotic property of solutions are obtained in bounded/unbounded domains.

ObjectiveTo provide a longitudinal evaluation tool based on the frequency of aggressive behavior for the aggression assessment of schizophrenia patients.MethodsThe Life History of Aggression was translated and revised to form the Life History of Aggression-Chinese Version （LHA-CV） based on 369 patients diagnosed with schizophrenia in the Chengdu community and compulsory medical institution. The reliability of LHA-CV was analyzed by means of split-half reliability, test-retest reliability and inter-evaluator consistency. The validity was analyzed by item analysis, construct validity and criterion validity.ResultsItem analysis found that LHA-CV had good homogeneity and discriminant validity. Exploratory factor analysis found that the Kaiser-Meyer-Olkin （KMO） test value was 0.80, and the Bartlett’s sphericity test χ2=1 203.46 （P

Polyacrylonitrile pre-oxidized fiber（PANOF）is an emerging flame retardant material with low cost and high performance，showing a promising application potential as thermal protection materials in the aerospace field.Pretreated PANOF（t-PANOF）was obtained by the process of oil removing with acetone and surface modification using silane coupling agent KH570 in turn.Scanning electron microscopy（SEM），Fourier transform infrared spectroscopy（FT-IR）and X-ray photoelectron spectroscopy（XPS）were employed to figure out the changes of morphology and chemical structure of the fibers before and after pretreatment and their interfacial properties with silicone rubber（SR）.Effects of t-PANOF on the mechanical and thermal performances of SR were further investigated. With the presence of ceramic forming agent（CFA），the ablation responsive behaviors of CFA/t-PANOF/SR ternary composites were researched as well.The results show that the level of interfacial adhesion between fibers and rubber is significantly enhanced contributed from the pretreatment of PANOF，and the tensile strength of the composites is improved accordingly.However，with the increasing content of t-PANOF，the comprehensive mechanical properties of t-PANOF/SR composites show the trend that increase first and then decrease，indicating that the optimal dosage of the fibers is 5 to 10 phr.t-PANOF skeleton helps to not only enhance the dimensional stability of SR in high temperature and oxygen-rich environment，but also improve the ablation performance of CFA/t-PANOF/SR composites.The antioxidation ceramic layer with fiber skeleton as the main structure is formed on the surface of CFA/t-PANOF/SR composites under the high temperature aerobic gas with the heat flux density of 2 MW/m2，the corresponding linear and mass ablation rate are only 0.02 mm/s and 0.02 g/s respectively，which is expected to be utilized as an ablation material to satisfy the demands of the new generation of aerospace vehicles.

ObjectiveTo investigate the menstrual conditions of women infected with COVID-19 in Shanghai and analyze the influencing factors.MethodsFrom December 2022 to March 2023， menstrual data from 281 women infected with COVID-19 in Shanghai were collected with a questionnaire survey， including usual menstrual characteristics， the most recent menstrual period post-infection， symptoms of infection， and medication usage. According to the crossover period between the menstrual period and the infection period of the respondents， the samples were divided into two groups for comparative analysis： those whose menstrual and infection periods overlapped （positive group） and those whose menstruation started after conversion to virus-negative （negative conversion group）.ResultsAmong the 281 respondents， 196 （65.8%） experienced menstrual changes. Among them， 145 （51.6%） had changes in menstrual volume， color and texture， and 109 （38.8%） had changes in menstrual duration or cycle. Decreased menstrual volume （22.1%）， darker color （23.49%）， thicker texture （21.0%）， increased blood clots （16.7%）， and prolonged duration （21.8%） were observed in both groups. The rate of changes in menstrual volume， color， and texture was higher in the positive group （56.8%， 69/110） than that in negative group （37.3%， 76/171） （P

In modern military warfare, the pattern of air-ground coordination with multi-formation has become more and more important. However, the existing target intention recognition methods are effective for single formation, but lack of effective solutions for multi-formation scenarios with air and ground coordination. In this paper, Dynamic Series Bayesian Network is used to identify the intention of air-to-ground cooperative formation. This method firstly constructs an overall model of intention recognition of air-to-ground cooperative formation by using DSBN, which is used to describe the cooperative action process between air and ground formations. Then, events in different battlefield domains and their related probability relations are fused together with auxiliary battlefield information. The inference network is used to recognize the intention of enemy cooperative formation. This method fully considers the behavior rules of the air target, describes its behavior pattern and trend in detail, and is more suitable for the scenario of multi-cooperative target formation. Finally, the feasibility and effectiveness of this method is verified by simulation example.

ObjectiveTo explore the clinical infection characteristics and delivery status of Listeriosis monocytogenes in pregnant women in a certain region， and to investigate the risk factors of infection cases to identify high-risk foods and risk factors， providing information for clinical diagnosis and treatment and improving pregnancy outcomes.MethodsA retrospective study was conducted on 10 cases of Listeriosis monocytogenes confirmed in a certain region from May 2020 to January 2023. The study investigated Listeriosis monocytogenes and analyzed the clinical characteristics and pregnancy outcomes of the cases.ResultsTen pregnant women had consumed fruits stored in the refrigerator， overnight meals， and various cold dishes before the onset of illness. The results of environmental sample testing in the homes of the 10 pregnant women showed that a total of 18 strains of Listeriosis monocytogenes were detected in the smear samples， mainly from kitchen chopping boards and food in the refrigerator. The gestational weeks of the 10 pregnant women infected with Listeriosis monocytogenes ranged from 16 to 38 weeks， with an average of （27.10±7.09） weeks. Nine cases had fever symptoms， eight cases had decreased fetal movement， accompanied by abdominal pain， nausea， and other digestive symptoms. Among the 10 pregnant women with Listeriosis monocytogenes， one case of fetal death occurred in utero， two cases of miscarriage， three cases of premature delivery， four cases of full-term delivery， and 85.71% （6/7） of newborns had Listeriosis monocytogenes infection.ConclusionListeriosis monocytogenes pregnant women often occurs in the middle and late pregnancy， and is related to maternal dietary habits， food， and environmental cross-infection. Maternal infection with listeria monocytogenes does not have characteristic clinical manifestations， and adverse pregnancy outcomes may still occur after anti-infection， which may also cause neonatal infection. Health education on listeriosis should be strengthened to raise maternal vigilance and attention to the disease， and to prevent and control listeriosis.

Flowers of Rhododendron have unique poricidal dehiscence anther, but the formation of the dehiscence pore and the mechanism of pollen releasing are not fully known. The purpose of this research was to study the anther development of Rhododendon × pulchrum through microdissection and paraffin section to find out how the dehiscence pore develops and what tissues are involved in its development. The results were as follows: (1) The tissue forming the apical pore and the main body of the anther diverged from the very beginning of the stamen development. The dehiscence pore is formed by breaking down of parenchyma tissue, which is derived from the apical meristem of stamen primordium. The body part of the anther comes from the archesporial cells and they develop into regular pollen sacs with multi-layered anther walls. (2) The anther wall is fully differentiated at the stages from microspore mother cell to microspore tetrad, with 6-7 layers of cells, including 1 layer of epidermis, 2-3 layers of endothecia, 1-2 layers of middle layers and 1 layer of tapetum. The middle layers soon break down after completion of microspore tetrads and the tapetum disappears before the pollen tetrads are fully mature. The epidermis and 2-3 layers of endothecia remain to the end. (3) Unlike those of longitudinal dehiscent anthers, the endothecia of Rhododendon× pulchrum are not fibrous at maturation. Instead, they are persistent and somewhat elastic through accumulation of polysaccharide granules in cells. (4) The four microspores produced by one microspore mother cell do not separate from each other and the pollens are released as tetrads, with viscous threads between pollens and among tetrads. The authors assume that the thickened multi-layer endothecia reduced the inner volume of the pollen sacs, therefore the pollen tetrads at the top are “squeezed out” from the dehiscence pore, and the viscous threads allow the pollen tetrads to be pulled out in clusters by pollinators.

BackgroundDomestic researches on the professional identity of psychiatrists are still relatively rare up to now， and effective evaluation tools remain inadequate.ObjectiveTo construct a professional identity questionnaire for psychiatrists with high reliability and validity， so as to provide an effective tool for the evaluation of professional identity of psychiatrists.MethodsA self-designed questionnaire titled "Professional Identity Questionnaire" was compiled. After preliminary screening of items and expert consultation， an initial questionnaire was formed and administered to a sample of 400 psychiatrists， and the final questionnaire was assessed by item analysis， reliability analysis and validity analysis.ResultsThe Cronbach's α coefficient was 0.930 for the final questionnaire， and ranged from 0.817 to 0.920 for each dimension. The value of KMO was 0.904 （χ2=2 931.652， P

Objective To evaluate the reliability, validity and diagnostic accuracy of the Canadian Longitudinal Study on Aging Epilepsy Algorithm (CLSA-EA) questionnaire (Chinese version) in screening Chinese adult epilepsy. Methods From August to October 2022, a total of 384 subjects and patients were included, who were respectively screened from urban and rural communities in Chengdu, Sichuan, and Department of Neurology of West China Hospital, Sichuan University. The CLSA - EA questionnaire (Chinese version) was used for the survey. Epilepsy was diagnosed according to 2014 International League Against Epilepsy (ILAE) criteria. Kappa coefficient and Cronbach's α coefficient were used to evaluate testretest reliability and internal consistency, respectively. Construct validity was used to test validity. The accuracy, sensitivity, specificity, positive predictive value, negative predictive value and diagnostic consistency κ value were calculated by confusion matrix method to evaluate the effect of screening. Results Finally, 348 questionnaires were obtained, including 190 epileptic cases (54.60%) and 158 nonepileptic cases (45.40%), of which 244 were retested subjects, including 123 epileptic cases (50.41%) and 121 non-epileptic cases (49.59%). Retest reliability analysis in epileptic cases showed that the consistency of items Q3a, Q3bⅲ , Q3bⅳ , Q4a and Q4b in CLSA-EA questionnaire (Chinese version) had moderate consistency (0.400 ≤ κ < 0.750; P = 0.000, for all). Items Q1, Q2, Q3bⅰ, Q3bⅱ, Q3bⅴ, Q3bⅵ and Q3bⅶ had poor consistency (0.000 ≤ κ < 0.400; P < 0.05, for all). In non-epileptic cases, the consistencies of items Q2, Q3a, Q3bⅰ, Q4a and Q4b were moderate (P = 0.000, for all), Q3bⅴ and Q3bⅵ were poor (P = 0.000, for all), and no consistencies of Q3bⅱ , Q3bⅲ and Q3bⅳ were found (P > 0.05, for all). The internal consistency evaluation in epileptic cases showed that the internal consistency of all items and the sum of all items in the CLSA-EA questionnaire (Chinese version) were poor (Cronbach's α coefficient < 0.700). The internal consistency of items Q4a and Q4b for non-epileptic patients was also poor, but other items and the sum of all items were acceptable (Cronbach's α coefficient 0.700-0.800). The structural validity analysis showed that the cumulative variance contribution rate of the four factors was only 43%, and items Q1 and Q3a were not incorporated into the factors. The accuracy, sensitivity, specificity, positive predictive value, negative predictive value and consistency of CLSA -EA2 epilepsy determination algorithm were higher (> 0.900, for all). Conclusions The CLSA - EA questionnaire (Chinese version) has high sensitivity and specificity, which can guide the preliminary screening of epilepsy in China. However, the applicability, reliability and validity still need to be further considered.

The precipitation behavior of secondary α phase and mechanical properties of high strength TB9 titanium alloy were investigated during single aging and duplex aging. The alloy phase constitution was analyzed by XRD，and the microstructure was observed by optical microscopy and scanning electron microscopy. The evolution characteristics of the microstructure with aging temperature were mainly analyzed. The room temperature tensile properties and fracture toughness were tested. The research results indicate that during single aging，secondary α phase exhibits serrated and layered precipitation. With increasing aging temperature，the size of α phase increases，and the content of layered α phase increases. The strength at 430 ℃ aging is lower and the plasticity is higher. The strength at 470 ℃ aging is the highest. With increasing aging temperature，the strength first increases and then maintains at the similar level. During duplex aging，most of secondary α phases precipitate in a serrated shape within the grains. With increasing aging temperature，the size of α phase increases，the tensile strength first increases and then decreases，reaching a maximum of 1542 MPa. The tensile strength of duplex aging is significantly higher than that of single aging，which is mainly due to the combined strengthening effect of second phases near grain boundaries and intragranular α phases with serrated shape.

Traditional Chinese medicine (TCM) has been used to treat triple-negative breast cancer (TNBC), a breast cancer subtype with poor prognosis. Clinical studies have verified that the Sanyingfang formula (SYF), a TCM prescription, has obvious effects on inhibiting breast cancer recurrence and metastasis, prolonging patient survival, and reducing clinical symptoms. However, its active ingredients and molecular mechanisms are still unclear. In this study, the active ingredients of each herbal medicine composing SYF and their target proteins are obtained from the Traditional Chinese Medicine Systems Pharmacology database. Breast cancer-related genes are obtained from the GeneCards database. Major targets and pathways related to SYF treatment in breast cancer are identified by analyzing the above data. By conducting molecular docking analysis, we find that the active ingredients quercetin and luteolin bind well to the key targets KDR1, PPARG, SOD1, and VCAM1. In vitro experiments verify that SYF can reduce the proliferation, migration, and invasion ability of TNBC cells. Using a TNBC xenograft mouse model, we show that SYF could delay tumor growth and effectively inhibit the occurrence of breast cancer lung metastasis in vivo. PPARG, SOD1, KDR1, and VCAM1 are all regulated by SYF and may play important roles in SYF-mediated inhibition of TNBC recurrence and metastasis.

Rotating nozzle profile enables the supersonic variable Mach number wind tunnel to continuously adjust the Mach number of the experimental area during a single operation，which is important for studying the aerodynam ic problems in the maneuvering process of the aircraft and the starting process of the inlet. In the process of controlling the nozzle profile rotation，whether the flow field parameters can change linearly is an important criterion to measure the performance of supersonic variable Mach number wind tunnel. Therefore，the linear variation law of flow field parameters in the experimental area of variable Mach number wind tunnel is analyzed in this paper，and a numerical simulation model is established using the spring smoothing dynamic grid technique to verify whether the flow field parameters in the experimental area meet the linear variation law when the nozzle is located at the corresponding position of Mach number 3.041~3.215. The results show that the linear change of the flow field parameters in the wind tunnel experimental area is achieved by controlling the rotation of the nozzle profile，and the dynam ic calculation results are in good agreement with the expected linear change law of the flow field parameters in the experimental area. In the linear change process of flow field parameters with different accelerations，the deviation between the average parameters of the experimental area and the expected parameters at each time is less than 0.13%.

The COVID-19 pandemic emphasized the importance of public spaces. Accessing public spaces during the pandemic improves physical health, reduces feelings of loneliness, and lessens depression. However, not all public spaces can provide an effective response during the pandemic. The public spaces’ ability to respond to the pandemic varies depending on their resilience level, which refers to the capability of those spaces to adapt to the challenges posed by the COVID-19 pandemic and maintain functionality to meet users’ needs during this crisis. By investigating the response of existing public spaces to the COVID-19 pandemic and identifying and examining the criteria of pandemic resilience, this study aims to explore and improve public spaces’ capability to respond effectively during the pandemic. One hundred and sixty nine public spaces in three regions in Chongqing City in China are studied. Four main criteria involving 9 sub-criteria of pandemic resilience that can be integrated into public spaces’ planning and design are studied. Three questionnaire surveys are used in this study to examine how public spaces adapt to the pandemic and evaluate the pandemic resilience criteria. The questionnaire data is analyzed using the Statistical Package for Social Sciences (SPSS) software. The pandemic resilience criteria are assessed and analyzed using a Geographic Information System (GIS). The study utilized the analytic hierarchy process (AHP) to assign weights to the criteria of pandemic resilience. Weighted overlay analysis (WOA) is applied to assess the pandemic resilience level in public spaces. Results indicate various possibilities for pandemic resilience depending on the characteristics of the area. However, these resilience levels are inadequate to respond effectively to the pandemic, resulting in diminished utilization of public spaces during the COVID-19 pandemic across all studied regions compared to the periods preceding the pandemic and after the complete reopening. This study presents a remarkable source for strengthening the resilience of cities against pandemic emergencies.

In this article, we study the uniqueness of positive symmetric solutions of the following mean curvature problem in Euclidean space: (P)u′1+∣u′∣2′+h(x)f(u)=0,−1

Continuous alumina fiber-reinforced ceramic matrix composites are one of the ideal thermal structural materials for aerospace applications. Mechanical properties of composites in different environments depend on the mechanical properties of continuous alumina fibers, but effect of different heat treatment environments on mechanical properties and microstructure of alumina fibers has rarely been reported. In this study, mechanical properties and microstructure of Nextel 610 fibers from different heat treatment atmosphere, heat treatment temperature and heat treatment time were characterized in detail. It is found that when heat treatment temperature is increased from 1000 ℃ to 1400 ℃, tensile strength of N610 fibers is decreased from 2.58 GPa to 0.94 GPa and surface grain size increased from 97.3 nm to 184.1 nm in air; tensile strength of N610 fibers is decreased from 2.18 GPa to 0.95 GPa and surface grain size is increased from 91.3 nm to 171.7 nm in steam. Many internal defects in N610 fibers because of H2O molecules diffuse into fibers at high temperature. At the same process of heat treatment, tensile strength and growth rate of surface grains of N610 fibers in steam are lower than those in air.

The Chinese name “Lingzhi” refers to Ganoderma genus, which are increasingly used in the food and medical industries. Ganoderma species are often used interchangeably since the differences in their composition are not known. To find compositional metabolite differences among Ganoderma species, we conducted a widely targeted metabolomics analysis of four commonly used edible and medicinal Ganoderma species based on ultra performance liquid chromatography-electrospray ionization-tandem mass spectrometry. Through pairwise comparisons, we identified 575–764 significant differential metabolites among the species, most of which exhibited large fold differences. We screened and analyzed the composition and functionality of the advantageous metabolites in each species. Ganoderma lingzhi advantageous metabolites were mostly related to amino acids and derivatives, as well as terpenes, G. sinense to terpenes, and G. leucocontextum and G. tsugae to nucleotides and derivatives, alkaloids, and lipids. Network pharmacological analysis showed that SRC, GAPDH, TNF, and AKT1 were the key targets of high-degree advantage metabolites among the four Ganoderma species. Analysis of Gene Ontology and Kyoto Encyclopedia of Genes and Genomes demonstrated that the advantage metabolites in the four Ganoderma species may regulate and participate in signaling pathways associated with diverse cancers, Alzheimer’s disease, and diabetes. Our findings contribute to more targeted development of Ganoderma products in the food and medical industries.

The inwardly rectifying potassium channel Kir2.1 is closely associated with many cardiovascular diseases. However, the effect and mechanism of Kir2.1 in diabetic cardiomyopathy remain unclear. In vivo, we use STZ to establish the model, and ventricular structural changes, myocardial inflammatory infiltration, and myocardial fibrosis severity are detected by echocardiography, histological staining, immunohistochemistry, and western blot analysis, respectively. In vitro, a myocardial fibrosis model is established with high glucose. The Kir2.1 current amplitude, intracellular calcium concentration, fibrosis-related proteins, and TGF-β1/Smad pathway proteins are detected by whole-cell patch clamp, calcium probes, western blot analysis, and immunofluorescence, respectively. The in vivo results show that compared to diabetic cardiomyopathy, zacopride (a Kir2.1 selective agonist) significantly reduces the left ventricular systolic diameter and diastolic diameter, increases the left ventricular ejection fraction and left ventricular short-axis shortening, improves the degree of cell necrosis, and reduces the expression of myocardial interstitial fibrosis protein and collagen fibre deposition area. The in vitro results show that the current amplitude and protein expression of Kir2.1 are both decreased in the high glucose-induced myocardial fibrosis model. Additionally, zacopride significantly upregulates the expression of Kir2.1 and inhibits the expressions of the fibrosis-related proteins α-SMA, collagen I, and collagen III. Activation of Kir2.1 reduces the intracellular calcium concentration and inhibits the protein expressions of TGF-β1 and p-Smad 2/3. Activation of Kir2.1 can improve myocardial fibrosis induced by diabetic cardiomyopathy, and the possible mechanism may be related to inhibiting Ca 2+ overload and the TGF-β1/Smad signaling pathway.

The effect of thermal exposure at 1000 ℃ to 1200 ℃ on the properties of porous matrix Al2O3/Al2O3 ceramic matrix composites was studied. The results show that the thermal exposure at 1000 ℃ for 100 h has no effect on the tensile strength of the composites. After 100 h at 1100 ℃, the tensile strength of the composites decreases slightly, and after 100 h at 1200 ℃, the tensile strength of the composites decreases obviously. The effects of different thermal exposure durations at 1200 ℃ on the properties of Al2O3/Al2O3 composites, alumina fibers and alumina matrix are further studied, and the micro morphologies of the samples are characterized by optical microscopy and SEM. The results show that the thermal exposure at 1200 ℃ for 100 h has little effect on the performance of alumina fiber, but has a great effect on the alumina matrix. After the thermal exposure at 1200 ℃ for only 10 h, the porosity of alumina matrix is significantly reduced and the density is significantly increased. It can be seen from the SEM morphology of the matrix fracture that with the increase of thermal exposure time at 1200 ℃, the alumina grain size of the matrix gradually increases and the matrix is further sintered. Correspondingly， it can be seen from the fracture morphology of the Al2O3/Al2O3 composite that the length and number of fibers pulled out also decrease significantly. The degradation of the properties of the composites after high temperature thermal exposure is mainly due to the further sintering of alumina matrix, and the densification of porous matrix reduces the toughening effect of the composites.

The study of the ancient Luanhe alluvial fan has focused more on the Holocene, and no systematic study has been conducted on its Pleistocene evolution and variation. We studied the magnetic stratigraphy, chronostratigraphy, sedimentology, logging sedimentology, and core color of the boreholes PZK10 and PZK20 in the ancient Luanshe alluvial fan. Based on that, we carried out a comprehensive study of the Quaternary three-dimensional geological structure, the scale of the alluvial fan body, and the migration pattern of the ancient Luanshe alluvial plain. The borehole PZK10 recorded Brunches, Matuyama, and Gauss polarity chrons; the boundaries between them are 77.42 m and 71.50 m, respectively. The borehole PZK10 also revealed a set of diluvial “mud-gravel” layers deposited in the Pliocene, with two alluvial fan-lake phase cycles in the Early Pleistocene, braided river deposits in the Middle Pleistocene, and lake, alluvial fan and braided river facies in the late Pleistocene. A set of highly thick “mud-gravel” layers was deposited in the Pliocene of the borehole PZK20. The early Pleistocene is the fan-front–plain-braided river facies deposition, the middle Pleistocene is the braided river–alluvial fan facies deposition, and the late Pleistocene is the braided river deposition. Early Pleistocene, the ancient Luanhe River out of the mountain formed a large-scale alluvial fan in Shaliuhe town, which is the first stage of the ancient Luanhe alluvial fan. In the middle of the early Pleistocene, the ancient Luanhe River diverged in the current Qiuzhuang reservoir, and the alluvial fan formed in the Fengrun area, namely the second stage alluvial fan. In the middle Pleistocene, the first alluvial fan began to shrink, while the second alluvial fan continued to develop, forming a vast thick gravel layer. Late Pleistocene, the ancient Luanhe river was captured north of Qianxi county. It flowed eastwards and migrated out of the research area into the Qian’an basin in Xixiakou village, forming the alluvial fan with Xixiakou village as its apex.

Global Cancer Statistics for 2020 show that urinary system tumors account for approximately 13% of the total number of cancers. At present, the diagnostic methods of urinary system tumors are imaging, endoscopy, and pathological examination. As the gold standard of tumor diagnosis, pathological examination has problems such as lack of pathologists and long operation time. Artificial intelligence (AI), with a strong ability for pathology image recognition and feature analysis, can be used as an auxiliary diagnosis. It has realized automatic diagnosis, typing, staging, grading, and prognosis prediction in several urinary system tumors. However, AI still has many shortcomings, which limit its clinical application. This article will review the progress of AI and its application in the pathological study of urinary system tumors.

The incidence of bladder cancer is increasing annually, and the gold standard for its diagnosis relies on histopathological biopsy. Whole-slide digitization technology can produce thousands of high-resolution captured pathological images and has greatly promoted the development of digital pathology. Deep learning, as a new method of artificial intelligence, has achieved remarkable results in the analysis of pathological images for tumor diagnosis, molecular typing, and prediction of prognosis and recurrence of bladder cancer. Traditional pathology relies heavily on the professional level and experience of pathologists; as such, it is highly subjective and has poor reproducibility. Deep learning can automatically extract image features. It can also improve diagnostic efficiency and repeatability and reduce missed and misdiagnosed rates when used to assist pathologists in making decisions. This technology cannot only alleviate the pressure of the current shortage of skilled workforce and uneven medical resources but also promote the development of precision medicine. This article reviews the latest research progress and prospects of deep learning in pathological image analysis of bladder cancer.

ObjectiveTo develop a rapid test for salivary bacterial community based on direct PCR （dPCR） and high resolution melting （HRM） curve analysis, to evaluate its application value in forensic medicine.MethodsThe salivary bacteria were collected by centrifugation and then resuspended in Tris-EDTA （TE） buffer, and directly used as the template for amplification and HRM curve analysis （dPCR-HRM） of the 16S rDNA V4 region. The genotype confidence percentage （GCP） of the HRM profiles compared with the reference profile was calculated. The template DNA was extracted by traditional kit and then PCR-HRM （namely kPCR-HRM） was used as reference to validate the feasibility of dPCR-HRM. The gradient dilution templates, population samples and simulated salivary stains were analyzed by dPCR-HRM to evaluate its sensitivity, typing ability and adaptability.ResultsUsing dPCR-HRM method, the HRM profiles of salivary bacterial community were obtained within 90 minutes. The GCP between dPCR-HRM and kPCR-HRM was greater than 95.85%. For general individuals, the HRM type of bacterial community could be determined with 0.29 nL saliva by dPCR-HRM. The 61 saliva samples could be divided into 10 types. The typing of salivary stains deposited within 8 h was the same as those of fresh saliva （GCP>90.83%）.ConclusiondPCR-HRM technology can be used for rapid typing of salivary bacterial community, and has the advantage of low cost and simple operation.

The human error of air traffic controller is the main cause of the aircraft collision in the air,and it is a difficult problem to effectively predict the failure probability of human factor of air traffic control(AT C).For this,on the basis of technique of human error rate prediction(THERP)and cognitive reliability and error analysis method(CREAM),a hybrid prediction method is proposed for failure probability of ATC human factor.Based on the binary tree model of THERP method,the basic chain of accident development is constructed,and then the triggering probability of human unsafety action is modified based on CREAM method,so as to draw a more accurate probability prediction conclusion.Through the comparative analysis of similar accidents,the key accident impact factors can be identified,and formulate targeted control measures.This paper provides an effective analysis method for studying the failure probability prediction of ATC human factor.

Peritoneal metastases (PM) are defined as the primary or secondary occurrence/progression of malignant tumor in peritoneum. PM were previously thought to be a terminal disease without effective treatment, with short survival and poor prognosis. With the change in the understanding of PM, the oncology communities regard it as a curable regional cancer metastasis, and create a comprehensive treatment technology system with cytoreductive surgery and hyperthermic intraperitoneal chemotherapy as the core, and establish professional PM treatment centers based on this. The professional PM treatment centers have significantly prolonged the survival of patients, and some patients can even achieve clinical cure. However, in China, there are very few professional PM treatment centers, but the number of PM patients is huge, and most of the patients can't receive professional treatment, resulting in poor survival and prognosis. Based on the cancer statistics in 2015 published by China National Cancer Center Registry and clinical outcome literature on peritoneal metastasis, this paper uses clinical epidemiology methodology to calculate the number of newly diagnosed patients with peritoneal metastasis, to estimate the number of specialized peritoneal cancer centers required, to provide data support for the promotion of professional treatment technology system for PM in our country, and to boost the development of peritoneal oncology.

ObjectiveTo investigate the current status of psychosocial services in various institutions as well as the mental health status of residents in Northeast Sichuan， so as to provide references for the further construction and implementation of psychosocial services in this area.MethodsA total of 148 institutions in Tongjiang county of Bazhong city， Lizhou district of Guangyuan city and Dazhu county of Dazhou city were surveyed through self-compiled questionnaires covering the construction status of psychosocial service system and the implementation of mental health service in each institution. Meantime， the mental health status and psychological service needs of 21 505 residents in pilot areas of three cities were investigated using the Patients' Health Questionnaire Depression Scale-9 item （PHQ-9）， Generalized Anxiety Disorder Scale-7 item （GAD-7） and the self-designed mental health service needs questionnaire.ResultsAmong the 148 institutions in the pilot areas， 81 （54.7%） of which had dedicated mental health service， and 58 （39.2%） were equipped with full-time or part-time mental health service personnel. In 2019， 95 （64.2%） institutions conducted mental health services for employees， and 104 （70.3%） conducted mental health propaganda activities. Of the 75 educational institutions， 67 （89.3%） conducted mental health education for students， and 47 （62.7%） achieved full coverage of the mental health education curriculum among students. The detection rates of depression and anxiety among the residents were 36.8% and 30.8%， respectively， and 83.7% of the residents had the mental health service needs， mainly in the aspects of personal growth， marriage and family， children's education and stress management.ConclusionThe psychosocial services in the pilot areas of the three cities in northeast Sichuan are well conducted， while the guarantee of workplace， funds and personnel remains to further strengthen. Furthermore， residents have prominent emotional problems such as depression and anxiety， and have a high demand for mental health services.

The influence of the molecular structure of monophenyl and diphenyl silicone rubber on the high temperature resistance was studied by combining experiment and molecular simulation. The results showed that hardness, mechanical properties and high temperature resistance of the diphenyl silicone rubber system were not significantly different from those of the monophenyl silicone rubber system at the early aging stage of high temperature of 400 ℃, but after 10 aging cycles of high temperature of 400℃, mechanical properties and mass retention rate of the diphenyl silicone rubber system were higher, and high temperature resistance was better. In addition, the results of molecular simulation confirmed that Si—O of diphenyl silicone rubber has higher dissociation energy at 675 K, and the diphenyl silicone rubber system has stronger steric effect, smaller free volume fraction, lower probability of contact with oxygen, and higher thermal stability in long-term high temperature environment.

Objective To report a case of spontaneous intracranial hypotension (SIH) with cerebral venous thrombosis (CVT) and subdural hematoma (SDH), summarize its clinical manifestations and imaging features, and improve clinicians' ability of diagnosis and differential diagnosis, as well as the recognition of the related complications. Methods and Results The patient was a 56⁃year⁃old male with a subacute to chronic disease course, with the onset of orthostatic headache, progressive exacerbation, and developed numbness and weakness in the right limb. Imaging findings revealed diffuse enhancement of dura mater, bilateral chronic SDH and CVT. After rehydration, anticoagulation, mechanical thrombectomy and thrombolytic therapy, the CVT was significantly reduced. Due to the continuous increasion in bleeding tendency and the expansion of SDH, after discontinuation of anticoagulant and craniotomy for hematoma removal, the condition was controlled, and the volume of SDH decreased. Follow⁃up 3 months after discharge, head MRI showed that there was basically no filling defect in the venous sinus, and the visualization was significantly improved; the patient's orthostatic headache disappeared, and no focal neurological dysfunction remained. Conclusions Although SIH with cerebral venous system thrombosis and SDH, treated by fluid replacement, anticoagulation, and endovascular treatment, the symptoms and signs induced by venous thrombosis can be improved, these measures can't prevent the further expansion of the SDH, early detection of leaks and repairs may be more conducive to the recovery.

This essay examines the relationship between human consciousness and nature in William Wordsworth's "The River Duddon" sonnets. By adapting the method of literary analysis, Wordsworth’s portrayal of the River Duddon serves as a lens through which the boundaries of human understanding are examined, illustrating an unbridgeable gap between human consciousness and nature. After a brief introduction of research background, this essay elaborates on the River Duddon's unattainable origin as cloud’s child in deferral to both antiquity and industry, eco-Gothic wilderness in departure and return pattern, and nonperishable eternity compared with the transience of human. By deconstructing anthropocentric views prevalent in Romantic literature, the research emphasizes the urgent necessity of acknowledging nature's subjectivity and its independent existence beyond human perception. This essay not only revitalizes the poetic landscape of Wordsworth but also advocates for a non-human turn in literary criticism, promoting ecological awareness and respect for nature.

As an important approach of rehabilitation, the respiratory rehabilitation training is effective to reduce the damage to the lung function and relieve the symptoms of respiratory disorder, thereby improving the quality of life and self-care ability of patients with stable chronic obstructive pulmonary disease. This paper summarized the research progress of respiratory rehabilitation training in patients with stable chronic obstructive pulmonary disease, and provided reference for the further research and clinical practice. (呼吸训练对促进慢性阻塞性肺疾病(COPD)稳定期患者康复具有重要作用, 呼吸训练能够在一定程度上减少患者肺功能受到的损伤, 减轻呼吸障碍症状, 从而提升患者的生活质量和自理能力。本研究针对COPD稳定期患者呼吸训练的研究进展进行综述, 旨在为相关工作提供有价值的参考。)

Objective To explore the characteristics and clinical significance of airway microbiota in the patients with neutrophilic asthma. Methods Induced sputum samples were collected from 44 patients with clinically stable neutrophilic asthma attending the second Affiliated Hospital of Army Medical University from August 2019 to January 2020. After DNA extraction, 16S rRNA and internal transcribed space (ITS) sequencing were performed by PacBio Sequel Systems. Two subgroups were identified by hierarchical cluster analysis on sequencing data, and the differences in their bacterial and fungal microbiota and clinical characteristics were explored. Results Hierarchical clustering analysis of bacterial sequencing data from 44 subjects identified 2 clusters. Compared to the larger cluster (group A1, n=32), the smaller cluster (group A2, n=12) was characterized by a predominance of Haemophilus in their bacterial microbiota, and the patients in this group demonstrated a higher percentage of sputum neutrophils (Z=-4.14, P < 0.001) and poorer FEV1% pred (t=2.15, P=0.037). In bacterial microbiota, there were significant differences in both α-diversity (Chao1 and Simpson indexes, P < 0.001) and β-diversity (Adonis, R2=0.290, P=0.001) between the 2 groups. At the species level, LEfSe analysis revealed that the group A1 was significantly enriched in Streptococcus pneumonia, Haemophilus parainfluenzae, Fusobacterium nucleatum, Lautropia mirabilis, Neisseria meningitides, Porphyromonas gingivalis, Prevotella melaninogenica, Prevotella pallens and Ralstonia solanacearum, while the group A2 was enriched in Haemophilus influenzae. In fungal microbiota, no significant differences were observed between the 2 groups in α-diversity (Chao1 index, P=0.230; Simpson index, P=0.097), whereas significant differences were observed between their β-diversity (Adonis, R2=0.068, P=0.002). At the species level, LEfSe analysis revealed that the group A1 was enriched in Schizophyllum commune, and group A2 was enriched in Trametes versicolor and Irpex lacteus. Interaction network analysis indicated that group A2 showed more correlations between genus than group A1, and the strength of association between genus was more intense. Conclusion Among the patients with stable neutrophilic asthma, there is a subgroup characterized by the presence of Haemophilus influenzae as its airway predominant colonizing bacteria, which differs significantly from the non-Haemophilus influenzae dominant group in terms of bacterial and fungal microbiota, and presents clinical characteristics with more severe airway inflammation and poorer lung function.

The paper proposes a data model analysis algorithm for human motion function based on short-term behaviour. The algorithm uses a functional data analysis (FDA) method to perform Fourier fitting on the motion data and extract the fitted approximate single period data. Finally, the algorithm depicts the internal change in the motion in the low-dimensional space. The study found that the characteristic motion data obtained by the algorithm has smooth characteristics, and the relevant case analysis also verifies the algorithm's effectiveness.

Objective To investigate the effect of miRNA-495 on the proliferation and apoptosis of acute myeloid leukemia (AML) cells with mixed lineage leukemia (MLL) gene rearrangement. Methods Ten patients diagnosed with AML with MLL-AF9 fusion gene positive (6 males, 4 females, mean age of 39.37±2.71 years), and 10 cases of AML (5 males, 5 females, mean age of 41.12±1.92 years) admitted in our hospital from August 2017 to May 2019 were enrolled in this study, and another 10 patients (6 males, 4 females, mean age of 42.31±3.21 years) who attended the surgical outpatient department during the same period were also collected as the control. THP-1 cells (containing MLL-AF9 fusion gene) were divided into miRNA-495 and control groups based on transfection with miRNA-495 or not, and the expression of miRNA-495 in each group was detected by RT-qPCR; CCK-8 assay was used to determine the proliferation of transfected THP-1 cells in each group; RT-qPCR and Western blotting were performed to measure the expression of proliferation-related factors (Ki-67 and PCNA) and apoptosis-related factors (Bcl-2, Bax and Caspase-3). The target genes of miRNA-495 were predicted by TargetScan and then verified by dual-luciferase reporter assay. Finally, RT-qPCR and Western blotting were adopted to detect the expression of serine/threonine/tyrosine interacting protein (STYX) in groups as follows: miRNA-495 group, control group, STYX group (transfected with STYX) and miRNA-495+STYX group (transfected with miRNA-495 and STYX). Results MiRNA-495 expression was down-regulated in AML patients with MLL-AF9 fusion gene, with relative expression of 0.25±0.08 (95%CI=-0.86~-0.65, P < 0.001); miRNA-495 inhibited cell proliferation (P < 0.001) and induced apoptosis of THP-1 cells, and it targetedly bound to STYX (P < 0.001). In addition, STYX overexpression reversed the effects of miRNA-495 on THP-1 cell proliferation and apoptosis. Conclusion MiRNA-495 regulates the proliferation and apoptosis of AML cells with MLL gene rearrangement by targeting STYX.

Stable isotope ratios of carbon, nitrogen, hydrogen and oxygen act as “nature’s recorder”. As a carrier for individual human information, human hair can be measured by isotope ratio mass spectrometry (IRMS) to translate into information about people’s dietary habits, health condition and life track. The basic principle behind establishing dietary lifestyle using isotopic profiles of human hair is the fact that the body’s only source of C, N is a person’s staple diet. It may have significant differences in carbon, nitrogen isotopic compositions of human hair that are living at different regions. The aim of the study was to analyze the discrepancy of 15N and 13C stable isotope ratios in human hair collected from different cities, and explore the relationship between carbon and nitrogen isotope ratios and human groups, such as gender and age. The carbon and nitrogen isotope ratios in the human hair of 247 local residents from 8 different cities were investigated by IRMS. The results showed that there were significant difference in carbon and nitrogen stable isotope ratios of human hair from different cities. The value of δ13C was negatively correlated with vegetable consumption per capita. The value of δ15N was positively correlated with meat consumption per capita, and might be increased by high intake of fish. The relationship between δ13C, δ15N and the factors of gender and age demonstrated that there were no significant difference between males and females, but the age of females showed a weakly negative correlation with δ13C. By comparing the data of this paper and other literatures, the carbon and nitrogen stable isotopes in the hair of residents in China were different from other countries, which implied that there were various dietary habits in different countries.

Due to the influences of buildings, geographical and geomorphological environments, road conditions, etc., the probabilities and numbers of casualties in different areas after an earthquake are different. Accordingly, we propose the concept of the lethal level, which attains different grades representing the mortality rate of differing intensities. Different regions have unique lethal levels, and regional lethal levels are affected mainly by the proportion of each building type and the corresponding lethal level, as different types of buildings also have unique lethal levels. Based on data of 52 historical earthquake disasters, we constructed a lethal level calculation model and obtained the lethal level of each building type. The results reveal that the lethal level ranges of different building types are fixed and unequal; moreover, the ranges of different building types overlap each other. The lethal level range of adobe structures is 0.85–1, that of civil structures is 0.75–0.95, that of brick-wood structures is 0.6–0.9, that of brick-concrete structures is 0.33–0.6, that of wood structures is 0.2–0.35, and that of reinforced concrete structures is 0.1–0.25. Based on the lethal levels of these building types, the overall level of a region can be quantified and graded, and this classification does not depend on the geographical location or administrative boundaries. In pre-earthquake evaluation efforts, the lethal level of an area can be derived through field research. After an earthquake, the number of casualties can be quickly assessed based on the mortality rate corresponding to the intensity of the area. This approach can further provide scientific support for risk zoning and risk assessment research.

Objective To investigate the staining and tracing effect of mitoxantrone hydrochloride injection for tracing lymph nodes in radical thyroidectomy, and its safety and tolerability. Methods In this study, a single-centered, open-labeled, blank control trial was designed. According to the principle of dose escalation, the human tolerance test and kinetic test were performed in dose groups one by one. Patients scheduled for radical thyroidectomy in Peking Union Medical College Hospital from December 2016 to March 2017 were prospectively enrolled as subjects. The subjects were divided into the blank control group and the test groups. The blank control group routinely underwent surgery without tracer injection; the test groups were injected with 0.2 mL, 0.4 mL, 0.6 mL, 0.8 mL, or 1.2 mL of mitoxantrone hydrochloride for tracing in the thyroid gland after exposing the surgical field, and an escalation test was performed in the five dose groups from low to high. The primary efficacy measures were lymph node tracing rate and lymph node staining rate; the secondary efficacy measures were staining-degree scores of lymph nodes and the success rate of tracing persistence. Changes in signs of subjects were recorded for safety assessment. Venous blood was collected from the subjects before administration and at 10 min, 20 min, 30 min, 60 min, 90 min and 120 min after administration to calculate the kinetic parameters. Results A total of 27 subjects were included, including 3 subjects in the blank control group, and 3, 3, 6, 6 and 6 subjects in the 0.2 mL, 0.4 mL, 0.6 mL, 0.8 mL and 1.2 mL dose group, respectively. When the test proceeded to the third dose group (0.6 mL), the injection site of the subjects was saturated with the injection dose, and the test was terminated. Therefore, a total of 15 subjects completed the test. No lymph node was stained in blank control group.The lymph nodes of 12 subjects showed blue staining, and the parathyroid glands were not stained and negatively visualized. There was significant difference in the staining-degree scores of lymph nodes before and after administration in the 0.2 mL, 0.4 mL and 0.6 mL dose groups (P < 0.05). The average staining rates of lymph nodes were 90.47%, 91.67% and 91.36%, respectively. And the average tracing rates of lymph nodes were 79.17%, 100% and 98.67%, respectively. In the test groups, the duration of lymph node dissection was 5-20 min; no stained lymph nodes faded, and the success rate of tracing was 100%. In the safety evaluation, no serious adverse events occurred in the blank control group and test groups, and the cause of adverse events was certainly not related to this tracer. Kinetic tests showed that the tracer was rapidly absorbed after glandular injection; the blood concentration peaked at 10 min after injection (the maximum plasma concentration was 13.1 μg/L) and it was rapidly eliminated. Conclusions The use of 0.2-0.6 mL mitoxantrone hydrochloride injection in radical thyroidectomy can play a better role in tracing lymph nodes, with high safety and good tolerance.

ObjectiveIn order to clarify the taxonomic status of Lactarius in Qiandongnan of Guizhou, and provid the basis for the identification of wild fungi in foodborne wild mushroom poisoning.MethodsThe morphological characteristics of fruiting bodies and phylogenetic analysis of ribosomal DNA internal transcribed spacer(rDNA-ITS) gene sequences were used for identification.ResultsIt was clear that there were 3 main kinds of Lactarius in the markets. The samples of indigo, amaranth and aurantius were identified as Lactarius vividus, Lactarius hatsudake and Lactarius subindigo based on morphological features. Then ITS gene sequence phylogenetic trees for the 34 fungi strains were divided into two branches, the Lactarius and other toxic fungi of the affinis species were distinguished. The TL1 and Lactarius subindig, TZ1 and Lactarius hatsudake, TH1 and Lactarius vividus were clustered into one group respectively, which were consistent with morphological identification results.ConclusionThe main species of Lactarius in Qiandongnan were the Lactarius hatsudake and Lactarius vividus, which were the same as another Lactarius in Guiyang. Among the Lactarius species, TL1 was identified as Lactarius subindigo, this was the first case reported in Guizhou.

Earthquake disaster risk analyses provide significant scientific guidance for reducing earthquake disaster losses etc. The current commonly used method is based on the vulnerability of different types of buildings to evaluate, and may ignore the difference between the seismic resistance of the same type of buildings in different areas. The lethal level considers a series of reasons such as different types of buildings, resulting in different capacities for casualties, the lethal levels of the cities in the same subregion are considerably different and exhibit obvious distribution characteristics. In Yancheng and Suqian, the lethal levels in urban areas are lower than those in rural areas, but the lethal levels in Guangzhou show the opposite trend (the lethal levels are higher in urban areas than in other towns and rural areas). The average lethal level in Guangzhou is 0.3856, that in Suqian is 0.5844, and that in Yancheng is 0.5912. This study based on the lethal levels, conduct a comparative analysis of the earthquake disaster risk of cities throughout eastern China, and a map of the earthquake disaster risk in each city is obtained. The overall lethal level and risk in Guangzhou is much lower than those in Yancheng and Suqian. The main influencing factors in the different cities also diverge. One reason for the lower lethal levels and risk in Guangzhou is that most of the brick-concrete structures are equipped with ring beams and structural columns; conversely, Yancheng and Suqian exhibit higher lethal levels and risk because the brick-concrete structures have ring beams but no structural columns. These maps provide a technical reference and solid scientific and technological support for further earthquake disaster risk analyses and for disaster prevention, mitigation and disaster relief planning, and this method improves the accuracy of rapid postearthquake assessment.