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Objective To evaluate the safety and feasibility of transumbilical single-port laparoscopic uterine artery embolization combined with incision and embryo retrieval in the treatment of cesarean scar pregnancy. Methods Eleven patients with cesarean scar pregnancy who underwent transumbilical single-hole laparoscopic uterine artery embolization combined with incision and embryo retrieval were recruited in the study group， and ten patients who underwent multi-hole laparoscopic uterine artery embolization combined with incision and embryo retrieval were assigned into the control group. Baseline data and perioperative clinical data were compared between two groups. Results No significant differences were found in age， number of pregnancies， number of cesarean sections， time interval from last cesarean section， clinical classification， number of days of menopause， and the presence or absence of symptoms of vaginal bleeding between two groups （all P > 0.05）. No significant differences were observed in operation time， intraoperative bleeding and postoperative retention time of catheterization between two groups （all P > 0.05）. In the study group， postoperative numeric rating scale （NRS） score was significantly lower and the length of hospital stay was significantly shorter compared with those in the control group （both P < 0.05）. Conclusions Compared with traditional multi-port laparoscopic uterine artery embolization combined with incision and embryo retrieval， transumbilical single-port laparoscopic uterine artery embolization combined with incision and embryo retrieval is a feasible and safe procedure， which can alleviate postoperative pain， shortern the length of hospital stay and yield better cosmetic results.

The effects of bound acrylonitrile content, curing system, reinforcing system and plastici-zing system on the corrosion resistance of nitrile rubber (NBR) to common chemical media in the field of petroleum exploitation were studied. The results showed that with the increase of bound acrylonitrile content, the physical and mechanical properties and thermal air aging resistance of NBR vulcanizates increased, the resistant to non-polar media such as kerosene and submarine control fluid was better, the resistance to methanol, distilled water and ethylene glycol aqueous solution decreased gradually, and the resistant to acid, alkali and brine had little diffe-rence. The curing system affected mainly the physical and mechanical properties and heat air aging resistance of NBR vulcanizates, and had little effect on the resistance of NBR vulcanizates to various petroleum exploitation media. For the high hardness NBR vulcanizates, the physical and mechanical properties of the vulcanizates were the best when small particle size carbon black was used as reinforcing system, and the effect of different reinforcing system on the heat air aging resistance of NBR vulcanizates was not obvious. However, the vulcanizates had better resistance to methanol and kerosene when large particle size carbon black was used as a reinforcing filler, and inert reinforcing filler should be selected. The physical and mechanical properties of NBR vulca-nizates added with macromolecule ester plasticizer were better than those with small molecule ester plasticizers and liquid NBR plastici-zer, and the heat air aging properties were similar, but the volume change of resistance to various media was larger, and the resistance to methanol, kerosene and 10% sodium hydroxide solution were poor, while the resistance to other petroleum exploitation media were less affected.

In order to investigate the effects of thermal processing methods on the quality and oxidation characteristics of pork, boiled, microwaved, roasted, or deep-fried pork loin was evaluated for quality indicators such as cooking loss, color, shear force, texture, basic chemical composition, odor and taste and oxidation indicators such as protein carbonyl content and thiobarbituric acid reactive substance (TBARS) value. The results showed that compared with the control group (raw pork), the quality and oxidation characteristics of cooked pork samples were significantly different. The decreasing order of cooking loss rate during different thermal treatments was roasting > microwave > deep-frying > boiling; protein and ash contents were positively correlated with cooking loss, while water content was negatively correlated with cooking loss. The most significant color changes were found in deep-fried pork, whose elasticity, cohesiveness and shear force were significantly different compared with the other treated groups. Protein carbonyl content was significantly higher in microwaved pork than the other treated groups (P < 0.05). Roasted pork exhibited the highest TBARS value. Electronic nose results showed an increase in the content of volatile flavor substances after thermal processing, and electronic tongue results indicated that the umami intensity of deep-fried pork was the highest. The results of this study can provide reference for the selection of pork thermal processing methods.

Intimate partner violence (IPV) is the most common type of domestic violence, which not only harms the victim's physical and mental health and life safety but also leads to the degradation of marriage, family, and children's development. IPV occurs among all socioeconomic, religious, and cultural groups. About a quarter of Chinese women have suffered some forms of IPV from their partner. Most patients will not present to the clinic with IPV. It is difficult yet essential for clinicians to quickly identify possible IPV among various non-specific symptoms and signs. There are no official guidelines for diagnosing and treating IPV in China, and the Chinese literature on IPV is scarce. This paper summarizes the evidence in English literature on IPV, focusing on the clinical outcome, identification, and management techniques of IPV, and attempts to discuss how this evidence can be applied to China.

Based on the implementing grain security projects and instituting other relevant grain security policies, China has promoted the process of digitalization and intelligence of grain storage and built the world's largest grain Internet of Things, since the 18th National Congress of the Communist Party of China. But, the resulting large amount of grain data, mainly based on temperature, can not effectively support decision-making and management on grain storage. Based on the study of the multi-field coupling theory of grain pile ecosystem, our research team further extracted the continuity principle, periodicity principle, and coordination principle of digital supervision of grain reserves, and proposed a series of intelligent strategies such as AID, ABC, 6R, SIN, CAE, O, and U. However, the application of these strategies directly faces the original data, which has some problems such as low efficiency and large error. To apply the intelligent strategies efficiently and correctly, the basic data manual of intelligent analysis of grain condition has been developed, according to the original grain condition data of typical granaries and main grain varieties in different grain storage ecological regions in China. The development of this manual is expected to consolidate the foundation of intelligent analysis of grain situation, which could promote the digital monitoring of grain storage quantity and quality, and realize the transformation from "manual defense" to “technical defense”.

The grain storage process could be affected by many aspects such as biological field and non biological field, which will lead to the phenomenon of heating, mildew, dewing and pest damage in the grain storage process. It is urgent to develop convenient, fast, multi-functional and high-precision on-site detection tools. According to the requirements of actual grain storage management, the multi-functional grain storage safety on-site rapid detection analyzer could calculate the stored grain moisture, water activity, absolute humidity, accumulated temperature, accumulated humidity, J/Q value and absolute water potential with models and algorithms on the basis of multi-point high-precision detection of temperature, humidity and CO2 concentration, and could graphically expresse the calculated results to assist in the determination of stored grain conditions such as safety, condensation, heat, mildew, etc, which will have mechanical ventilation operation parameter selection and intelligent control. The preliminary application of the instrument shows that it can provide effective technical support for granary management and has a good application prospect.

To explore the structure of longan polysaccharide and its effect on macrophages, a homogenous polysaccharide (named LP) was isolated and purified from longan pulp by ethanol fractional precipitation, and the structure of LP was characterized by gel permeation chromatography with laser light scattering (GPC-LLS), infrared spectroscopy (IR) and nuclear magnetic resonance (NMR) spectroscopy. Meanwhile, its effect on the phagocytic capacity of macrophages and the secretion of tumor necrosis factor-α (TNF-α), interleukin (IL)-1β and IL-6. The results showed that LP was a heteropolysaccharide with a weight average molecular mass of 8.42 × 105 Da composed of glucose, galactose, mannose, mannuronic acid, arabinose and rhamnose at a molar ratio of 98.70% : 0.57% : 0.35% : 0.09% : 0.20% : 0.12%. NMR spectroscopic analysis showed the backbone chain structure of LP to be 6)-α-Glcp-(1→6)-α-Glcp-(14)-α-Glcp-(-1. LP at 50, 100, 200 μg/mL promoted the phagocytic capacity of macrophages and increased the secretion of TNF-α, IL-1β and IL-6. The phagocytic capacity of LP-induced macrophages increased by 95.61% compared with the untreated control group. TNF-α, IL-1β and IL-6 secretion in macrophages challenged by LP at 50, 100 and 200 μg/mL were 2.38, 10.51 and 10.67 times higher than those in the control group, respectively. These results showed that LP had an activating effect on macrophages, which can provide a scientific basis for the deep processing of longan fruit.

In this paper, the conversion of methanol and butanol and the differences in product distribution over H-SAPO-34 were investigated. Some important reaction intermediates were captured during the reaction process by using gas chromatography-mass spectrometry (GC-MS) and 13C cross polarization magic angle spinning nuclear magnetic resonance (13C CP MAS NMR) spectroscopy. In the methanol conversion process, ethene, propene and butene are the main products, while in the butanol conversion process, butanol is mainly dehydrated to form butene, and propene and butene are the main products in the initial stage. Light olefins are generated from both methanol and butanol conversion over H-SAPO-34. Furthermore, the aromatic species were observed in both retained species analysis and 13C CP MAS NMR, indicating that similar organic species confined in the H-SAPO-34 during the conversion of alcohols. Starting from different kinds of alcohols, the acid-catalysis environment in the confined space of H-SAPO-34 can catalyze the methanol and butanol conversion to produce light olefins.

[Introduction] The fuel cell distributed generation technology is an important application direction to adapt to the future development trend of low-carbon, clean and high-efficiency energy. There are few domestic fuel cell power station projects , and there is a lack of actual project experience accumulation. In order to promote the application of fuel cell distributed power station technology, the research outlined the current application status at home and abroad, summarized the advantages and disadvantages of high temperature fuel cells, investigated domestic fuel cell construction and application cases, and established solid oxide fuel cell (SOFC) and molten carbonate fuel cell (MCFC) power generation system processes. [Method] After literature research and field research, two fuel cell distributed generation technologies suitable for the construction of large-scale power stations were identified. Chemical simulation software AspenPlus was used to establish the process model, electrochemical model and energy analysis model for the fuel cell system, and the performance simulation analysis of the system was carried out. [Result] The analysis results show that they are consistent with the actual operation results and the system performance trend predicted by the analysis is consistent with the existing research. [Conclusion] The simulation method can be used in the research of MW-level high-temperature fuel cell distributed generation system, and can provide data support for expanding the application scale of fuel cells.

Objective To implement and evaluate an online hybrid teaching mode as “rain classroom—directed self-study—scientific research design—home experiment” in the cloud experimental course of medical biochemistry for international students. Methods Research design and home experiments were introduced through revised design of teaching contents to develop a new online hybrid teaching mode. A total of 105 international students majoring in clinical medicine (MBBS, 89 students) and dentistry (BDS, 16 students) were selected to join the online the teaching mode during COVID-19 pandemic. Results Compared with the traditional experimental class, the cloud hybrid teaching model effectively stimulated students' enthusiasm and encouraged their participation in experimental course. Students used the existing teaching and online resources to complete the self-study independently, built capacity of research logical thinking, research methodology and then initiated research design and home experiments. Conclusions The training of research design and home experiments can support online experiment teaching in order to cultivate students' innovative thinking and capacity building of experiment technology, and to improve the teaching effect of online biochemistry experiments.

In view of the difficulties, including simple facilities, temporary team formation, high working intensity, medical safety hazards and difficult emergency disposal etc. in medical management when large-scale Fangcang hospitals admitted and treated large quantity of patients during the epidemic period of the COVID-19 Omicron variant. We explored the medical management system of large-scale Fangcang hospital from the aspects of establishing a medical management team, formulating medical management system and disease diagnosis and treatment standards, upgrading the safety precautions and control, refining quality control evaluation and strengthening hospital-wide training and supervision. Aiming at improving the safety and the medical quality as the core goal, strengthening the medical system and optimizing the workflow are optimized via summarized the practical experience, to make large-scale Fangcang hospitals respond well to public health emergencies.

Objective: To construct a training program on emergency response ability for all staff in emergency medical wards under COVID-19 epidemic, and to evaluate its clinical effect. Methods: A targeted training program for emergency response ability of all staff in the emergency medical ward was established through literature review, brain storming and online conference discussion. The scheme includes seven modules: training system, training plan, training outline, training course, teaching team, training materials and teaching evaluation. For medical staff, other staff (nursing workers, work attendance, cleaning), patients and family members of different categories of personnel, advanced version, basic version and popular science version are designed respectively, and the training content closely fitted the needs of epidemic prevention and skills required in different groups. During the period from April 5 to May 10, 2022, the training program was conducted to train the emergency response ability in all staff,and effect was evaluated using questionnaires invstigation before and after training, oral questions, operation assessment and on-site inspection, and the incidence of clinical actual infection was monitered. Results: The score after traning on response ability to infectious disease emergencies in medical staff( 161.27±14.13) was higher than before the training (143.38±23.10) (P

The management team from Ruijin Hospital had successively participated in the design, construction and operation of many Fangcang shelter hospitals. Combined with the large scale of the hospital, large amount of patients and medical wastes, high infection risk of staff, this paper summarizes the experience of our team in the prevention and control work from design of Fangcang shelter hospital, infection prevention and control system and operation process, staff training, health management, medical waste management, which may provide reference for the safe and stable operation of large shelter hospitals.

The multi-task convolutional neural network (MTCNN) face detection algorithm has a low detection rate of small faces in classroom scenes. An improved MTCNN algorithm that integrates context features was thus proposed. Firstly, the context convolution module was integrated with the R-Net layer network of the MTCNN model, and the feature map receptive field was expanded to obtain more small face information. Secondly, the deconvolution layer and the max-pooling layer were introduced to solve the problem of inconsistency of feature fusion data dimensions. Finally, the O-Net layer network of the MTCNN model integrated the context convolution module to further extract the small face feature information, and two convolutional pooling layers were introduced for feature fusion. The experimental results show the detection accuracy increased by 3% on the FDDB data set, the face detection recall rate and the F1 score increased by 8.69% and 4.94% respectively on the classroom scene data set compared with those of MTCNN algorithm.

With the rapid development of electronic equipment and wireless communication in recent years, problems of electromagnetic interference are also becoming more and more serious. It is urgent to develop high performance electromagnetic interference(EMI) shielding materials to alleviate the damage of electromagnetic interference. MXene(Ti3C2Tx) is a novel kind of 2D material with ultrahigh electrical conductivity and unique chemically active surface, and therefore exhibits extremely excellent electromagnetic shielding performance. The preparation, structural feature and EMI shielding mechanism of Ti3C2Tx were focused and introduced in this paper,the latest research progress on EMI shielding applications of Ti3C2Tx-based films and 3D porous materials was objectively reviewed and evaluated, and the main problem at the present was analyzed. In addition, the future development direction and tendency of Ti3C2Tx-based EMI shielding materials from the aspects of preparation, microstructure control and structure design and so on were also prospected in this poper,based on current development needs including developing low-cost, green and efficient Ti3C2Tx preparation methods, solving the long-standing oxidation problem of Ti3C2Tx, designing new structure of Ti3C2Tx-based EMI shielding materials and finding out other MXenes EMI shielding materials other than Ti3C2Tx, which can provide new ideas and guidance for the further development of the next generation of high-performance EMI shielding materials.

Aimed at the problems of low processing accuracy and surface quality of die-casting aluminum alloy under the influence of cutting force, a method of using surface micro-textured milling cutter with groove and V-shaped arrays on the rake face was proposed. The variations of milling forces were monitored and analyzed by using tri-direction-force transducer, and the spectrum characteristics of the y-direction milling force (Fy) was emphatically analyzed. The spectrum analysis diagrams of Fy of three different milling cutters were obtained by fast Fourier transform. The milling performance of the micro-textured milling cutters was evaluated by surface topography and surface roughness. The results show that compared with the average values in the x, y, and z directions of the conventional milling cutter, the values of the groove micro-structured milling cutter are reduced by 3.8%, 0.29%, and 11.7%, while those of the V-shaped micro-structured milling cutter are reduced by 8.5%, 14.3%, and 12.4%. The relationship between high frequency amplitudes of Fy at 6 times spindle frequency are proposed as conventional milling cutter>groove arrays milling cutter>V-shaped arrays milling cutter. Compared with the conventional milling cutter, the surface roughness is decreased when using micro-textured milling cutters, and the surface quality of the workpiece processed by the V-array milling cutter is the best. This paper will provide a theoretical basis for precision milling of die-cast aluminum alloys.

This study investigated the boring ability of four stored grain insects including Tribolium castaneum, Cryptolestes ferrugineus, Rhizopertha dominica, and Sitophilusoryzae to seven common rice packaging materials at the temperature of 28 ℃ and relative humidity of 75%±5%. The results showed that the double-sided coated perforated packaging material and the single-sided film perforated packaging material exhibited poor insect resistance and had no defense against the four insects at different life stages.However, the double-sided coated non-perforated packaging material, the double-sided coated packaging material with lining, the vacuum PE packaging material, and the inflatable PE packaging material can prevent the boring of the four insects.

China is a major agricultural country, and the production of agricultural waste is increasing year by year. However, the utilization rate of resources is still low. Anaerobic dry fermentation technology is mainly used to treat solid organic matter with a total solid content of 20%~40%(wt). It is an effective way to recycle agricultural waste resources, which has the advantages of low water consumption and high volumetric gas production rate. Due to the high solid content, there are still some problems in the anaerobic dry fermentation technology, such as slower reactor start-up, difficulty in mixing materials, and poor heat and mass transfer. Therefore, the innovation of anaerobic dry fermentation equipment and optimization of process parameters will directly affect the further promotion and application of this technology. The research and application status of anaerobic dry fermentation technology at home and abroad in recent years were summarized, the operating characteristics of typical batch and continuous anaerobic dry fermentation reactors were compared, and the effects of main process parameters on anaerobic dry fermentation were analyzed. The shortcomings of the current anaerobic dry fermentation technology were presented, and the future development trend of the technology was prospected in terms of technical equipment and process research, which is to develop design methods for key links in anaerobic dry fermentation equipment, and to carry out in-depth research on mechanisms, such as biogas residue rheological properties and microbial dynamic changes, etc.

Free radical-cationic hybrid UV-curable resin applied to UV-cured 3D printing was developed with epoxy resin (EPON828) and polyurethane acrylate (RJ429) as photosensitive prepolymers. The influences of types, ratios and dosages of free radical and cationic photoinitiators on photocuring kinetics, mechanical properties and prototyping precision of hybrid UV-curing resin were investigated. The results show that cationic photoinitiator Gencure 842 and free radical photoinitiator Doracur 1173 are the most appropriate hybrid photoinitiators, with an optimum mass ratio of 0.75:1 and mass fraction of 6%. The optimum mass ratio of EPON828 and RJ429 is determined as 1:1, and the viscosity of the developed resin is 50.5Pa·s. The tensile strength, impact strength, volume shrinkage and warpage of UV-cured resin items are 6.60MPa, 8.28kJ·m-2,-3.986% and 3.62%, respectively. The hybrid UV-curing resin can basically satisfy the requirements of UV-cured 3D printing.

Objective To analysis the safety and outcome of intravenous thrombolysis with recombinant tissue plasminogen activator (rt⁃PA) in patients with acute mild ischemic stroke. Methods From November 2017 to October 2018, 252 patients with acute mild ischemic stroke who were admitted into our hospital within 4.50 h after onset (84 patients in intravenous thrombolysis group, 108 patients in aspirin and clopidogrel group, and 60 patients in aspirin or clopidogrel group). The general condition, the level of high⁃sensitivity C⁃reactive protein (hs⁃CRP) and erythrocyte sedimentation (ESR) were compared among 3 groups. The modified Rankin Scale (mRS) were evaluated on 7 d after admission or at earlier discharge, and 21 and 90 d. Symptomatic intracranial hemorrhage rates were compared among 3 groups. Results There were no significant difference in general clinical data, the initial level of hs⁃CRP and ESR between the intravenous thrombolytic group and the 2 non⁃thrombolysis groups. At 7 d after admission or earlier discharge, the descending range of hs⁃CRP and ESR in 3 groups were significant (P = 0.000, for all); there were significant differences among the 3 groups (P = 0.000, for all); pairwise comparison of 3 groups showed that the levels of hs⁃CRP and ESR in intravenous thrombolytic group at 7 d were significantly lower than aspirin and/or clopidogrel group (P = 0.000, 0.000; P = 0.000, 0.010). There was no significant difference in the rate of intracranial hemorrhage between thrombolytic group and other 2 groups at 24 h after treatment [1.19% (1/84) vs. 0 (0/168); χ 2discharge, the intravenous thrombolytic group had better prognosis than aspirin and/or dopidogrel group (P = 0.043, 0.012); At 21 and 90 d, the intravenous thrombolytic group had better prognosis than aspirin or clopidogrel group (P = 0.021, 0.037); but compared with aspirin and clopidogrel group, there was no significant difference (P = 0.070, 0.053). Conclusions Patients with mild ischemic stroke, especially that may induce disability should be treated with rt⁃PA intravenous thrombolysis timely. If it impossible by any causes, aspirin and clopidogrel should be given within 24 h after onset. DOI：10.3969/j.issn.1672⁃6731.2019.12.012

Objective To understand the characteristics of patients in the emergency observation room, analyze the factors influencing death, and provide orientation for improving the level of emergency treatment in the hospital. Methods The data of all patients discharged from the emergency observation room in a tertiary hospital in Shanghai from January 1 to December 31, 2019 were collected. The patients were divided into the death group and the survival group based on their outcome. The clinical data of two groups were compared, and the characteristics of death cases were analyzed. Results In 2019, there were 2 211 patients discharged from the emergency observation room, including 125 deaths and 2 086 survivors. Among the surviving patients, 1 183 were discharged (accounting for 56.71%), and 903 were admitted to specialized departments for further treatment (accounting for 43.28%). The median (25th, 75th percentile) observation time was 2.50 (1.00, 9.00) days, and 1 076 patients (accounting for 48.67%) had an observation time longer than 72 h. The average age was (67.81 ± 18.87) years, and males accounted for 57.98% (1 282 cases). The death group had a higher incidence of respiratory system diseases and malignant tumors than the survival group, while the survival group had a higher incidence of nervous system diseases (P < 0.01). The frequencies of using non-invasive ventilators and electrocardiogram monitoring in the death group were higher than those in the survival group (P < 0.01). The peak period of death occurrence was mainly in the winter. The multivariate logistic regression analysis showed that the risk of death increased to 1 . 057 and 1 . 013 times for every 1 year increment of age and every 1 day increment of staying in observation time, respectively (P < 0.001); the risk of death for patients with two or more diagnosed diseases was 3.873 times that of patients with one diagnosis (P < 0.001); compared with patients from the clinic, the risk of death for patients from the rescue room increased to 2.877 times (P < 0.001). Conclusions The hospital should standardize the triage and treatment of critically ill and complicated patients, allocate and distribute emergency resources reasonably, and strengthen the observation of the condition. Effective prevention and treatment strategies should be formulated based on high-risk factors such as old age, respiratory system diseases, tumors, and seasonal variations to improve the efficiency and quality of emergency treatment. [ABSTRACT FROM AUTHOR]

From the perspective of rural revitalization, the rural industrial development is an important means to consolidate and expand the achievements of poverty alleviation, a powerful starting point for the transformation and upgrading of industrial poverty alleviation to industrial prosperity, and a key to realizing the convergence of poverty alleviation to rural revitalization. In order to further promote the development of rural industries, the connotation and characteristics of the involution of rural industrial development were studied, and the status of the involution of rural industrial development under the background of rural revitalization was actively explored. Then, the countermeasures were put forward including fostering a variety of new forms of business to promote the sustainable development of rural industries, promoting the sustainable development to achieve the new economic stability, promoting the high-quality development of agricultural and rural areas to help the implementation of rural revitalization strategy, and improving the endogenous power of farmers to promote the realization of common prosperity, so as to achieve the goals of rural industrial de-involution development. [ABSTRACT FROM AUTHOR]

Objective: To investigate the main problems in the pharmaceutical care of Klebsiella pneumonia-carhapenemase-producing Klebsiella pneumoniae (KPC-Kp) infection in a patient combined with severe acute pancreatitis and hepatic failure. Methods: The pharmaceutical care of a specific case was introduced from the aspects of the choice of initial anti-infective drugs, the optimization of antiotic regimens for KPC-Kp infection and prevention and control of adverse drug reactions (ADRs). Results: Based on the pathophysiological conditions of the patient, optimal medication strategies were proposed and careful pharmaceutical care was provided by the clinical pharmacists. As a consequence, good therapeutic efficacy was achieved. Conclusion: Pharmaceutical care of the patient included development, adjustment and optimization of anti-infective regimens, as well as prevention and control of ADRs. [ABSTRACT FROM AUTHOR]

Test automaton is an important factor for the quality of Android applications. In order to improve the efficiency of automaton, test case generation and the ability of abnormity discovering in traditional automated testing of Android application, an automatic test method for Android application was proposed based on particle swarm optimization algorithm, named particle swarm optimization for Androdd (PSOA). The PSOA method was arranged with three functions, including information collecting of control units, test process modularizing, test case generating and test data optimizing with the particle swarm algorithm. Experimental comparing with traditional automated test, the proposed method can successfully improve the ability of abnormity discovering, the efficiency of test case generation and the rate of automation. [ABSTRACT FROM AUTHOR]

From the co-evolutionary viewpoint of "information diffusion - right game", the paper builds the co-evolutionary game model of mass emergency derived from environmental pollution, and then makes multi-agent social simulation analysis under the platform of NetLogo. The research results show that mass emergency derived from environmental pollution has two types of co-evolutionary path: one is the "not in my back yard" with "negotiation - unblocked information - rational collective protest", the other is the mass emergency with "black case operate - information overflow - irrational collective protest". Under the different scenarios of payoff and information parameters, there are various results of evolutionary equilibrium. As the exterior disturbance, the degree of information management by local government leads to the phenomenon of "evolutionary equilibrium drift". Local government can not only choose the game structure of negotiation which respects the right to know and participate of nearby residents, but also strengthen the information management, so as to impel the nearby residents to accept the disposal method. [ABSTRACT FROM AUTHOR]

Sexual and asexual propagation of Xanthoceras sorbifolia natural populations in different habitats and their importance in population regeneration were studied. The results showed that X. sorbifolia populations were capable of the sexual and asexual propagation in 3 slope aspects, but a balance between the two propagation modes was observed. In sunny and semi-shady slope habitats, seedling amount and space-occupying competence were relatively high, suggesting that the sexual propagation was dominant. In semi-sunny slope habitat, the populations were superior in sexual sprout amount and space-occupying competence, suggesting that the predominant propagation mode was asexual. In the same habitats, asexual sprouts grew better than seedlings, while the growth of seedlings was in the order of sunny slope>semi-sunny slope>semi-shady slope on the basis of the same origin. The bottleneck stage appeared from seeds to seedlings for sexual propagation and from seedling to ramet for asexual propagation. X. sorbifolia invaded and settled in a way of sexual propagation in new habitats, and then rapidly occupied habitat space in a way of asexual propagation. [ABSTRACT FROM AUTHOR]

Based on the transmission equation of acoustic wave in a layered media, the absorption coefficient of the multilayer porous material backed with an air gap is calculated. Taking a double-layer Aluminum foam backed with an air gap for an example, the effect of acoustic parameters of each layer and thickness of air gap on the absorption coefficient is analyzed. The results show that the absorption coefficient of the sound absorption structure with an air gap gradually increases with the increase of porosity, thickness, and flow resistivity of each porous material respectively. At low frequency, increasing the thickness of air gap will lead to the increase of the absorption coefficient, and the maximum absorption coefficient shifts towards lower frequencies. At intermediate frequency, the sound absorption structure without the air gap shows a better sound absorption property when the porosity or flow resistivity are increased. Therefore, the sound absorption level can be achieved in a wider frequency range through the adjustment of material parameters of each layer. [ABSTRACT FROM AUTHOR]

In order to clarify the heat stress effects, under ambient air temperature and humidity, on thermoregulation, psychological responses, autonomic nervous and salivary amylase activity of the human body, 6 young fem ale subjects we a ring only shorts and a brassiere were exposed to 9 conditions consisting of air temperature of 28°C, 31°C and 34°C and 30%, 60% and 90% relative humidity for 60 minutes. The results of the analysis of variance are summarized as follows: Mean skin temperature, sweat rate, sKin moisture were significantly increased with an increase in air temperature and humidity, but rectal temperature showed no significant differences. Thermal, humid and uncomfortable sensations changed to the uncomfortable side w ith increasing temperature and humidity. ③ Heart rate, LF (Low Frequency)/HF (High Frequency) and salivary amylase activity were significantly increased with an increase in air temperature and humidity, while HF showed only tendency to be decreased. ④ High correlation coefficients between SKin moisture and uncomfortable sensations (r=0 .888),humid sensations (r=0.982),salivary amylase activity (r=0958) and LF/HF (r=0.910), suggested a dominant indicators of the heat stress. S a livary amylase activity and LF/HF were also suggested as an effective indicator of heat stress. [ABSTRACT FROM AUTHOR]

A geometrical model for geometrical localization of T²-R multistatic sonar is established. A multistatic time-bearing-localization (MTBL) algorithm is proposed, and the error of geometrical dilution is presented. The effects of baseline length, sonar deployment and measurement error on the localization accuracy of algorithm are studied through numerical simulation, and other indispensable influencing factors are qualitatively analyzed. The simulation results show that the localization accuracy in most regions is improved with the increase in length of baseline. For the given deployment mode, the localization accuracy is sensitive to the time measurement error, but the bearing measurement error has a limited impact on the performance of the algorithm. The proper deployment of sound sources can enhance the mean localization accuracy. The study provides a well theoretical evidence for underwater localization of T²-R multistatic sonar. [ABSTRACT FROM AUTHOR]

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In order to examine the quantitative effects of moisture permeability of clothes on clothing climate, blouse type film clothes made of films with different porosities, that is, having a holes of Omm, 3mm, 6mm and 7.5mm in diameter per 4 cm² respectively, were made and used for wearing test in a climatic chamber at 34°C and 50%. The temperature and humidity inside the film clothes, sweat rate and subjective ratings such as humid and comfort sensation were determined. The subjects consisted of 7 young females. The results were summarized as follow: ①Air and moisture permeability of the film increased and thermal insulation decreased with increasing porosity. ②As results of the analysis of variance on wearing tests, both factors A (porosity of film clothes) and B (experimental condition) showed a significant difference of 1% level for each temperature and humidity inside the clothes, and only factory A showed a significant difference for the sweat rate. ③Both heat resistance (Rd) and evaporative heat resistance (Re) of the film measured through a skin model test decreased with the porosity of the film in the case of an existing air layer beneath the film. ④Re showed a high correlations with humidity inside clothes and sweat rate, suggesting that Re was a dominant factor for determining the clothing climate, sweat rate and comfort sensation of subject. ⑤In addition, the difference between moisture permeability of perforated film and textile clothes was discussed. [ABSTRACT FROM AUTHOR]

Taking the natural Quercus variabilis forest in Shangluo, south slope of Qinling Mountains as the object in May 2006 and August 2011, which was under close to natural management of different thinning intensities (30%, 20%, 10%), and the un-thinned forest as the control, changes of the stand growth situation before and after thinning, population regeneration, species diversity and soil fertility after 5 years of thinning were analyzed, and the effects of thinning on forestland revegetation and community development were evaluated comprehensively. The results showed that the number of 1-6 years old Q. variabilis seedlings increased with increasing thinning intensity, while no significant difference was found for above 6 years old seedlings. The regeneration potentials of population under 10%, 20% and 30% thinning were respectively increased by 10.8%, 28.5% and 32.9% compared with the control. Thinning promoted the DBH and crown of the trees and shrubs, as well as the height of shrubs, especially for light-loving plants, and the effect of promotion increased with increasing thinning intensity. The species diversity and soil fertility were improved after thinning, in order of 30% > 20% > 10% > control. The thinning intensity of 30% (canopy density 0.6) was more conducive to the continuable development of the natural Q. variabilis forest in which canopy density was above 0.85. [ABSTRACT FROM AUTHOR]

Aiming at the issues that robustness and security of most image watermarking are not strong, a digital watermarking algorithm based on multi-factor encryption and Contourlet transform is proposed. Using the good pseudo randomness and mathematical statistical characteristics and the advantages of simple and quickly generated sequences of Chebyshe map, three chaotic sequences are Produced. Two of them are used to encrypt the watermarking image, the left one is used as watermarking embedded keys; The Contourlet Transform is used to extract the sub-band coefficients of the original carrier and the encrypted watermark, then the coefficients of the watermark is embedded into the coefti-cients of the original carrier, thus accomplishing the watermark embedding process. The method is implemented and experiments are performed to compare the proposed method with other methods in literatures. The resutt shows that the algorithm owns better effect on robustness, security and invisibility. [ABSTRACT FROM AUTHOR]

With the maturity and popularization of the database techniques, datasets which are stored in computers become larger and larger. People are already not only satisfied with the data management, but also hope to analyze data, finding knowledge and information from large numbers of datasets. Pixel-oriented visualization techniques stand out from other visualization techniques with advantages of its effectively analyzing and dealing with large scale database. With the comprehensive contrasts of several classic visualization techniques from tje time efficiency and the display results, the paper proposes a method to realize the data visualization which based on the pixel techniques. This new method applies the high-efficiency scan line seed fill algorithm to making the large scale datasets switch into different color pixels and then displaying them in the structured pixel mapping model. It provides guidance to a macroscopical analysis of the changing regularity to large scale datasets, and greatly improves the efficiency of the algorithm. [ABSTRACT FROM AUTHOR]

With the selection of Geldart B type magnetite powder as medium solids, we investigated the density distribution characteristic of the fluidized bed along the directions of bed heights and axial positions, by combining the experimental measurement and numerical simulation based on the Euler-Euler multi-phase model. The results indicate that the distribution range of bed densities along bed heights and axial positions are 1.95-2. 10 g/cm³ and 2.00-2. 10 g/cm³ respectively with the operating gas velocity of 1.50Umf ≤ U ≤ 2.20Umf, and the standard deviation both less than 0.20 g/cm³. The density stability of axial positions is better than the density stability along different bed heights. Therefore, we should pay close emphasis to maintain the density fluctuation along bed heights as least as possible, which aims to improve the density stability in the whole ADMFB. It shows good agreements of the experimental measurement and numerical simulation results. [ABSTRACT FROM AUTHOR]

In August-November 2010 and August 2011, and taking the pure Quercus variabilis forests under close-to-natural management of different thinning intensity (30%, 20%, and 10%) in Shangluo district of south slope of Qinling Mountains as the object, an investigation was conducted on the seed amount of seed bank, the survival rate and growth status of seedlings, and their relationships with environmental factors 4-5 years after thinning. As compared with the control, the seed amount in the seed bank of 10%, 20%, and 30% thinning plots increased by 2.0%, 21.1%, and 34. 8%, respectively in the fourth year after thinning, and the 1-year-old seedlings amount increased by 28. 5%, 99. 7%, and 122. 2%, respectively in the next year. The survival rate of the seedlings in the 10%, 20%, and 30% thinning plots was increased by 25.5%, 235.7%, and 480. 0%, respectively in the fifth year after thinning. Thinning improved the light, temperature, soil moisture, and soil nutrient conditions in the forests, which promoted the heightand new shoot growth and the leaf area index of each age seedlings. The three growth indices also increased with increasing thinning intensity. In the Q. variabilis forest with a canopy density of ≥ 0. 85, the thinning intensity 30% (canopy density 0. 6) was most conducive to the seed germination and seedling growth. [ABSTRACT FROM AUTHOR]

A sampling plot investigation was conducted on the seedling regeneration, stand growth, species diversity, and soil characteristics in a Pinus tabulaeformis plantation in Huanglong Mountain on the Loess Plateau of Northwest China after 7 years of close-to-natural management thinning 15% (light thinning), 30% (medium thinning), and 45% (heavy thinning), with the effect of different thinning intensities evaluated. With the increase of thinning intensity, the amount and growth indices of 1-7 years old P. tabulaeformis seedlings increased, but the mean annual increments of the growth indices decreased after an initial increase, with the maximum under medium thinning. As compared with the control (un-thinned plantation), the individual volume under light, medium, and heavy thinning was increased by 20. 9%, 32. 1% and 52. 6%, the volume per hm2 decreased by 4. 4%, 15. 1%, and 25. 3%, and the mean annual growth rate of volume increased by 28. 6%, 46. 2% and 82. 0%, respectively. The species diversity and soil characteristics were improved under thinning, with the order of heavy thinning > medium thinning > light thinning > un-thinning. In this study, 45% thinning was most suitable to the management of P. tabulaeformis plantation in Huanglong Mountain. [ABSTRACT FROM AUTHOR]

To achieve effective integration of production monitoring systems within various workshops, and the sharing of data resources in the LAN (local area net), on the basis of the existed monitoring systems, first, a common data interface was developed, and datum in heterogeneous database were effectively integrated. Then, two technical difficulties that are network management and data security were studied, and the corresponding solutions were designed via database technology, network technology and RBAC (Role-Based Access Control) theory, etc. Meanwhile, work principle of the system was introduced. Finally, a networking integrated monitoring system was developed for the textile enterprise. The application results show that the integrated monitoring system has achieved effective integration of heterogeneous databases, solved the problem of data isolation, and realized the sharing of production data within local area net. [ABSTRACT FROM AUTHOR]