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The airport collaborative decision making can effectively improve the operational efficiency of airports， so as to improve the operational efficiency of the whole civil aviation transportation network. The relevant standards，policy files and research papers of collaborative decision making are compiled in this paper. The development history of in airports and the current situation of research and application on collaborative decision making in academia and industry，both in China and abroad are collated. The future development trend of collaborative decision making in airports and the challenges faced by collaborative decision making in the current period are discussed and analyzed. Some suggestions for the development of collaborative decision making in airports based on the actual situation in China are given. The theoretical support and basis for improving the operational efficiency and economic benefits of airports and the whole air transportation network are summarized. The study in this paper can provide theoretical support and basis for operational efficiency and economic efficiency of the whole air traffic network.

ObjectiveAcupuncture, acknowledged as a potent non-pharmacological therapy, is frequently employed to alleviate pain. Despite its widespread use, there has been a lack of overarching bibliometric analysis of clinical research on acupuncture analgesia. We aimed to summarize current patterns, hotspots, and development trends in this field through bibliometric analysis.MethodsThis study evaluates academic publications retrieved from the Web of Science database (2010.01–2023.09) concerning acupuncture analgesia in clinical settings. All primary and secondary studies on humans were included. To track global developmental trends, we employed several software for analyzing annual publication volumes, countries/regions, institutions, authors, cited authors, journals, cited journals, references, and keywords and to draw collaborative networks and reference co-citation network maps.ResultsThe final search encompassed 7,190 relevant studies, including 1,263 randomized controlled trials (RCTs) and 1,293 systematic reviews and meta-analyses. The results indicated a gradual increase in the number of annual publications on acupuncture analgesia in clinical practice. Among countries and institutions, China (2,139) and Chengdu University of Traditional Chinese Medicine (258) ranked first. Liang FR (89 articles) was the most prolific author, while MacPherson H (604) was the most cited author. MEDICINE (455) was the most productive journal, and Pain (2,473/0.20) ranked first in both the frequency and centrality of cited journals. Notably, the most frequently cited reference was a systematic review of individual patient data on acupuncture carried out for chronic pain that was published by Vickers Andrew J in 2012 (156). Burst analysis identified frontier research areas for 2010–2020, encompassing network meta-analysis, case reports, dry needling, lumbar disc herniation, cancer, post-herpetic neuralgia, insomnia, and bibliometric analysis.ConclusionThis study outlines current trends and potential future research hotspots in clinical acupuncture analgesia over the past decade. Findings emphasize the necessity for enhanced international collaboration to improve research output and translation.

The continuous alumina fiber reinforced alumina ceramic matrix composite (Al2O3f/Al2O3 ceramic matrix composite) have the characteristics of high melting point, high strength, oxidation resistance, etc., which improves oxidation resistance of the existing aerospace thermal components, and is an ideal candidate material for the application in high temperature and aerobic environment. In this paper, firstly, the constituents of Al2O3f/Al2O3 composites were analyzed, including reinforced fibers, ceramic matrix and interfacial materials. Moreover, the preparation processes of Al2O3f/Al2O3 ceramic matrix composites such as slurry infiltration, sol-gel method, precursor infiltration and pyrolysis method, were summarized. The influence of preparation process on the properties of alumina ceramic matrix composites was discussed and numerous achievements were listed. Lastly, feasible optimization schemes were proposed for the preparation of Al2O3f/Al2O3 ceramic matrix composites with high strength and fracture toughness under medium-high temperature load and long service period.

Nondestructive testing technology, as an indispensable part of modern industrial production, is of great significance for guaranteeing product quality, improving production efficiency, and ensuring production safety. This paper is based on nondestructive testing and electromagnetic sensing detection technology research. The study first adopts ACFM detection to analyze the sensitivity of the surface defect parameters of the material to be detected, and based on the analysis of the magnetic circuit of the electromagnetic sensing structure, to build a mathematical model of ACFM and electromagnetic coupling probe, and then through the magnetic method of non-destructive testing on the material cracks in the detection of the signal effect of the study. The results show that the amplitude of the response signal increases with the increase of the defect angle from 0 to 7 ms, reaching a maximum value of 0.24–0.26 around 6 ms. The amplitude of the response signal decreases with the decrease of the defect angle from 7 to 14 ms and reaches a minimum value of −0.16–0.18 around 14.5 ms. The amplitude of the detection signal is related to the depth of the crack and the length of the surface defect of the steel sheet specimen. The crack depth and surface defect length of the steel plate specimen influence the detection signal’s magnitude. When the defect depth and surface length of the steel plate specimen are 1.5 mm, the detection signal value is weak, and the noise on the surface of the steel plate specimen has a significant effect on the detection signal. Promoting the development and application of NDT technology is greatly aided by the results of this paper.

Lithium/fluorinated carbon (Li/CFx) primary battery is a promising energy supply device with high energy density. However, poor electrochemical capabilities such as the initial voltage delay phenomenon and the large polarization have obstructed their applications. The electrochemical performance of CFx primarily depends on the feature of the carbon source and the corresponding fluorination technique. Herein, we developed a high energy density Li/CFx battery by employing helical carbon nanotubes (HCNTs) as the carbon source. In detail, the precise control of the fluorination temperature was designed at the range of 250–400°C to tune the F/C ratio of CFx. Furthermore, the high F/C ratio of fluorinated HCNTs (F-HCNTs) reaches about 1.43, which surpasses the highest theoretical value in fluorinated crystalline carbon materials. Due to the active rich fluorination sites provided by the periodical insertion of the carbon pentacyclic (C5) and heptacyclic (C7) rings, HCNTs exhibited a defect-rich feature and F-HCNTs have a nodular shape. These features favor to enhance the transport of lithium ions and allow more C–F bonds to react with lithium ions, leading to a high energy density of 2133.13 W h/kg. This novel material offers an alternative approach for lithium primary battery being great potential in actual applications.

In order to meet the needs of large area thermal protection(≥1500 ℃)for high-speed aircraft, the high temperature resistant alumina fiber reinforced aerogel composite was used as the thermal insulation layer, and the carbon fiber fabric was used as the panel layer preform. Through the normal needle puncture process and the precursor impregnation pyrolysis process, the integrated TPS material for thermal protection was prepared, and the high temperature resistance performance tests were carried out to provide theoretical and technical support for the engineering application of materials. The results show that the integrated TPS material with good integrity and no obvious defects can be prepared by needle puncture suture technology and PIP process, and the density is only 0.6 g/cm3. When C/SiC composites are used in high-temperature oxidation environment, the oxidizing atmosphere diffuses into the material through defects such as pores and cracks, and oxidizes with carbon fibers, resulting in the degradation of composite properties. The material has excellent high temperature resistance, with mass ablation rate of 0.051 g/s and linear ablation rate of 0.077 mm/s; There is no obvious gap structure, and there is no obvious shrinkage on the whole, showing good high temperature resistance.

Alumina fiber reinforced alumina ceramic matrix composites possess high temperature resistance, high strength and oxidation resistance, etc, and have a considerable application prospects in the field of thermal structural materials used in aerospace. Using NextelTM 610 fabric as the reinforcement, alumina ceramic matrix composites were prepared by Slurry Infiltration-molding process and sintered in a muffle furnace at high temperature for one time. The temperature range suitable for the preparation of composites was determined by the effects of heat treatment temperature on the crystalline phase, mechanical strength and other properties of fiber and matrix. The effects of solid content on the mechanical properties and microstructure of the composites were studied. The results show that the bending strength of NextelTM 610/Al2O3 ceramic matrix composite increases first and then decreases with the increase of solid content. When the solid content of the slurry is 60% (mass fraction, the same below), the bending strength is the largest, up to 370.68 MPa. When the solid content is less than 60%, the reason why the flexural strength of the composite is low is that the matrix in the fiber bundles is not filled enough. When the solid content increases to 65%, the degradation of the flexural strength of the composite is due to the formation of too many matrix defects and the strengthening of the fiber-matrix interface, which hinders the fiber debonding, pull-out and other toughening mechanisms.

Fibrous porous ceramics with three-dimensional structure, constructed by random stacking chopped fibers and binders at crossover nodes, shows lightweight, high porosity and specific surface, high refractoriness. These important characteristics render them very suitable for large-area thermal protection system of spacecraft, which can greatly reduce its quality and costs, while providing well thermal protection for aircraft. Recently, many efforts have been made to improve mechanical property of fibrous porous ceramics.The types of fiber skeletons, binders, optimization of preparation methods, and the latest research progress were summarized. The multiple insulation mechanism, integration and engineering of fibrous porous ceramics were prospected.

This research studied the effect of cordyceps militaris noodles on alleviating physical fatigue and concentration of serum lipids in mouse. The mouse were divided into feed group, blank noodle group, low dose of C.militaris noodles group and high dose of C.militaris noodles group, and the animal model of swimming fatigue was established. The exhausted swimming time of mouse in each group was recorded, and the related indexes of alleviating physical fatigue and affecting lipid concentration in mouse were measured. The results show that there was no significant difference in body weight of mouse in each group. Compared with feed group and blank noodle group, cordyceps militaris noodles could effectively prolong the exhausted swimming time of mouse (P

Developing high-efficiency and low-cost visible light photocatalyst is a great challenge for degrading both air and liquid pollutants. Herein, we developed a large-scale preparation of ultrafine TiO2@C hybrid visible light photocatalyst for high-performance degradation of formaldehyde and methyl orange (MO) at low cost using the ultra-low temperature (

For the implementation of lake ecological protection, understanding the water pollution status and spatio–temporal variation of water quality has become the most important thing for water safety in the basin. To analyze the water quality in recent years, water quality data in Erhai lake from 2013 to 2017 were first collected from typical nine monitoring stations. Based on the comprehensive water quality index (WQI) method, the temporal and spatial variation characteristics of water quality in Erhai lake were analyzed, and the main factors affecting water quality in Erhai lake were explored. The results indicated that the water quality of Erhai lake was worse than its target water quality, and total nitrogen (TN) and total phosphorus (TP) exceeded the Class Ⅱ standards (TN: 0.5 mg L−1, TP: 0.025 mg L−1) of China’s Environmental Quality Standard for Surface Water (GB3838-2002). In terms of changes across seasons, the overall lake water quality in the dry season was better than that in the wet season, and TN and TP reached the peak value in September. In terms of spatial distribution, water quality of the northern area was better than that of the southern area in the dry season, whereas water quality of the southern area was better than that of the northern area in the wet season. At present, Erhai lake is at a critical turning point of water eutrophication, and its nutrition status is mainly affected by both nitrogen and phosphorus. The pollution load from the land area is the main factor affecting the deterioration of Erhai lake. Our results can provide a scientific basis for the treatment of the water environment of Erhai lake.

CaBi2Nb2-xCoxO9 ceramics were prepared by a solid-state reaction method. The effect of Co doping on their piezoelectric, dielectric and conductive properties was studied. The results show that the structure of Co doped CBN ceramics is the orthorhombic symmetry and CaBi2Nb1.95Co0.05O9 ceramics are found with impurity phase. All of the CBNCo ceramics have compact structures and are in good sinter condition. The density and the piezoelectric activity of CBN ceramics are obviously improved with Co doping contents. Co dopant greatly decreases the dielectric loss values and slightly increases the Curie-temperature of CBN ceramics. Meanwhile, the introduction of Co dopant increases the number of defects and thus changes the conductive mechanism.

C/SiC composites had been prepared by PIP process. The evolution of microstructure and mechanical properties after high-temperature (>1500 °C) oxidation were discussed and compared. The results showed that PIP-C/SiC composites had been severely damaged after oxidation tests, micro-cracks and holes emerged along with the increasing of the oxidation temperature, which lead to the decreasing of mechanical properties. After high-temperature flexural tests, the thermal mismatch between C fibers and SiC matrix gradually caused the expansion of micro-cracks, which lead to the decreasing of flexural strength. The mechanical performance deteriorated because defects in the matrix increased and some fibers were oxidized. For long-time use at higher temperature (≥1600 °C), it was necessary to develop a more protective coating with higher stability and melting temperature.

ZrB2-SiC coating was prepared on C/SiC composites surface by slurry method, and then the thermal fatigue behavior of ZrB2-SiC coated C/SiC composites was studied. The composition of the coating layers was characterized by XRD, SEM and EDS. With the thickness was 200 μm, the coating was ZrB2 and SiC. During thermal cycle between 1773 K in air and 373 K in boiling water, the weight of the ZrB2-SiC coated composites decreased lightly. The decrease of the flexural strength during the thermal cycle was primarily due to the debonding of the fiber–matrix interfaces and the oxidation of the coated samples. Compared with the uncoated C/SiC composites, the coating played an important role in enhancing the resistance to the thermal shock.

Fracturing ability is the characteristic used to measure whether the tight reservoir could be effectively fractured and form network in the process of hydraulic fracturing in order to improve the production of oil and gas. Research shows that the more brittle the reservoir is, the weaker the fracture toughness is, the more developed the natural fracture is, the higher the maturity of organic matter is, the lower the organic carbon content is, and the better the fracturing ability is. In addition, factors such as crustal stress, sedimentary environment and internal structure of the reservoir also affect the fracturing ability. The analysis of reservoir fracturing ability plays a key role in the strata selection, multi-stage fracturing design and prediction of oilfield economic benefits.

Carbon fiber-reinforced silicon carbide (C/SiC) composites were well-established light weight materials combining high specific strength and damage tolerance. For high-temperature applications, protective coatings had to provide oxidation and corrosion resistance. The literature data introduced various technologies and materials, which were suitable for the application of coatings. Coating procedures and conditions, materials design limitations related to the reactivity of the components of C/SiC composites, new approaches and coating systems to the selection of protective coatings materials were examined. The focus of future work was on optimization by further multilayer coating systems and the anti-oxidation ability of C/SiC composites at temperatures up to 2073 K or higher in water vapor.

A evaluation system was constructed and each weight of the indexes was calculated based on the principle of AHP (Analytic Hierarchy Process), which were benefit of safety and sustainable development of chemical enterprise, emergency response capacity, accidents numbers and property losses The results show that emergency prevention capability and emergency preparedness capability are the key elements in the first-level indicator system. The plan initiation, drill, hazard source control and monitoring and early warning, emergency command, coordination and rapid response capability are the key elements in the secondary indicators.

This study investigates how Chinese scholars in Applied Linguistics construct different authorial stances in their English and Chinese research articles (RAs) by using interactional metadiscourse comprising boosters, hedges, and self-mentions. A specially designed corpus of 22 Chinese and 22 English RAs written by the same group of Chinese scholars was compiled and examined for metadiscourse forms and functions. We found that (a) while the Chinese scholars employed similar frequencies of boosters in both their Chinese and English RAs, they used significantly more hedges in their English RAs than in their Chinese RAs; (b) while they used more boosters than hedges in their Chinese RAs, a reverse pattern was found in their English RAs; (c) they used significantly more self-mentions, particularly first-person pronouns in their English RAs, than in their Chinese RAs. These findings indicate that the same Chinese scholars have displayed different epistemic stances and authorial identities in their Chinese-medium and English-medium publications.