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Customization of FeNi alloy nanosheet arrays inserted with biomass-derived carbon templates for boosted electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 812-824页

作者： Xuanqi Yang Honghan wang Jing Chen Qingda An Zuoyi Xiao jingai Hao Shangru Zhai Junye Sheng Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefineryCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China Qingdao Medical College Qingdao UniversityQingdao 266071China

Electromagnetic wave(EMW)-absorbing materials have considerable capacity in the military field and the prevention of EMW radiation from harming human ***,obtaining lightweight,high-performance,and broadband EMW-absorbing material remains an overwhelming *** dielectric/magnetic composites with customized structures is a strategy with great promise for the development of high-performance EMW-absorbing *** layered double hydroxides as the precursors of bimetallic alloys and combining them with porous biomass-derived carbon materials is a potential way for constructing multi-interface heterostructures as efficient EMW-absorbing materials because they have synergistic losses,low costs,abundant resources,and light ***,FeNi alloy nanosheet array/Lycopodium spore-derived carbon(FeNi/LSC)was prepared through a simple hydrothermal and carbonization ***/LSC presents ideal EMW-absorbing performance by benefiting from the FeNi alloy nanosheet array,sponge-like structure,capability for impedance matching,and improved dielectric/magnetic *** expected,FeNi/LSC exhibited the minimum reflection loss of-58.3 dB at 1.5 mm with 20wt%filler content and a widely effective absorption bandwidth of 4.92 ***/LSC composites with effective EMW-absorbing performance provide new insights into the customization of biomass-derived composites as high-performance and lightweight broadband EMW-absorbing materials.

关键词： spore-derived carbon FeNi alloy nanosheet array multi-interface heterostructures synergistic effect efficient electromagnet-ic wave absorption

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Hazard Assessment of Urban Flood Disaster and Safety Protection Strategy for Flood Disaster Prevention and Reduction in China

Hazard Assessment of Urban Flood Disaster and Safety Protect...

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2004安全科学与技术国际会议

作者： wang jingai1 2 3 wang Jue1 2 & YE Tao1 3 (1 School of Geography Beijing Normal University Beijing 100875 China) (2 Key Laboratory of Regional Geography of Beijing Normal University Beijing Normal University Beijing 100875 China) (3Key Laboratory of Environmental Change and National Disaster of Ministry of Education of China Beijing Normal University Beijing 100875 China)

Based on disaster system theory and analysis of 70 cities in China whose population is over 600 thousand, a hazard assessment system has been established combining hazard-formative environments, hazar

关键词： urban flood disaster system integrated hazard index security of urban areas security protection strategy for flood prevention and reduction

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A novel flexible nerve guidance conduit promotes nerve regeneration while providing excellent mechanical properties

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Neural Regeneration Research 2025年第7期20卷 2084-2094页

作者： Tong Li Quhan Cheng jingai Zhang Boxin Liu Yu Shi Haoxue wang Lijie Huang Su Zhang Ruixin Zhang Song wang Guangxu Lu Peifu Tang Zhongyang Liu Kai wang Department of Orthopedics the Fourth Medical Center of Chinese PLA General HospitalBeijingChina Department of Training and Sports Medicine Characteristic Medical Center of Chinese People’s Armed Police ForceTianjinChina Medical School of Chinese PLA BeijingChina Key Laboratory of Bioactive Materials for the Ministry of Education College of Life SciencesNankai UniversityTianjinChina Department of Orthopedics Tianjin HospitalTianjinChina Department of Rehabilitation Medicine Er Quan Hospital of PAPWuxiJiangsu ProvinceChina

Autografting is the gold standard for surgical repair of nerve defects>5 mm in length;however,autografting is associated with potential complications at the nerve donor *** an alternative,nerve guidance conduits may be *** ideal conduit should be flexible,resistant to kinks and lumen collapse,and provide physical cues to guide nerve *** designed a novel flexible conduit using electrospinning technology to create fibers on the innermost surface of the nerve guidance conduit and employed melt spinning to align ***,we prepared disordered electrospun fibers outside the aligned fibers and helical melt-spun fibers on the outer wall of the electrospun fiber *** presence of aligned fibers on the inner surface can promote the extension of nerve cells along the *** helical melt-spun fibers on the outer surface can enhance resistance to kinking and compression and provide *** novel conduit promoted nerve regeneration and functional recovery in a rat sciatic nerve defect model,suggesting that it has potential for clinical use in human nerve injuries.

关键词： aligned fibers anti-kinking helical fibers nerve guidance conduit nerve regeneration peripheral nerve injury topological guidance

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基于氧含量的自然地带区划新认识

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地理教学 2024年第6期 4-7页

作者：胡金鹏胡小康王静爱北京师范大学地理科学学部北京100875

自然地带区划是培养学生的人地协调观、综合思维、区域认知等地理学科核心素养的重要途径。本文以“三维自然地带”分布规律为基础,对比分析了青藏高原地表氧含量新区划与原有自然区划,得到了新的认识:基于地表氧含量的自然地带区划能... 详细信息

自然地带区划是培养学生的人地协调观、综合思维、区域认知等地理学科核心素养的重要途径。本文以“三维自然地带”分布规律为基础,对比分析了青藏高原地表氧含量新区划与原有自然区划,得到了新的认识:基于地表氧含量的自然地带区划能够反映更加综合定量的地域分异特点;氧含量的地域差异能够反映人地关系的地域差异。本文可为相关课程的教学提供新的视角,帮助学生综合认知区域自然环境特点和人地缺氧健康风险。

关键词：自然地带区划地表氧含量青藏高原地理学科核心素养

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Spatiotemporal Changes of Hazard Intensity-Adjusted Population Exposure to Multiple Hazards in Tibet During 1982–2015

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International Journal of Disaster Risk Science 2018年第4期9卷 541-554页

作者： Anyu Zhang jingai wang Yao Jiang Yanqiang Chen Peijun Shi Key Laboratory of Environmental Evolution and Natural Disaster Ministry of EducationBeijing Normal UniversityBeijing 100875China Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Key Laboratory of Regional Geography Beijing Normal UniversityBeijing 100875China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China Qinghai Normal University Xining 810008QinghaiChina

The dynamic changes of population exposure to hazards in high-altitude areas are an important factor in the scientific evaluation of environmental risks. In this study,the hazards of hypoxia, earthquakes, and snowstorms in Tibet were respectively described by the percentage of oxygen at sea level, earthquake intensity, and mean annual maximum snow depth. The rates of population affected by hypoxia, earthquakes, and snowstorms were calculated by chronic mountain sickness and historical disaster *** on these, the study examined the change in population exposure to the three hazards and their combinations by hazard intensity level at the 1 km 9 1 km grid scale in1982–2015. The results show that population exposures to hypoxia, earthquakes, and snowstorms were about 745 thousand, 97 thousand, and 168 thousand in 2015,respectively, among a total population in Tibet of 3.24 million. These exposures were mainly concentrated in the3400–5000 m above sea level zone. The population exposed to hypoxia and earthquakes showed a rising trend from 1982 to 2015, while the population exposed tosnowstorms decreased after 2000 due to reduced snowstorm intensity. Hypoxia-earthquake and hypoxia-snowstorm are the main multiple hazard combinations that people in Tibet suffered from and their personátime exposures were estimated at around 842 thousand and 913 thousand in 2015, respectively, with an average annual increase of 1.7% and 1.3%. Hypoxia is the most important health risk in Tibet. The areas of high personátime exposure to multiple hazards of hypoxia-earthquake-snowstorm are the key areas for strengthening integrated risk governance.

关键词： Earthquake High altitude Hypoxia Population exposure Snowstorm Tibet

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Maize drought disaster risk assessment of China based on EPIC model

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International Journal of Digital Earth 2012年第6期5卷 488-515页

作者： Huicong Jia jingai wang Chunxiang Cao Donghua Pan Peijun Shi State Key Laboratory of Remote Sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal UniversityBeijing 100101P.R.China Key Laboratory of Regional Geography College of Geography and Remote Sensing ScienceBeijing Normal UniversityBeijing 100875P.R.China National Disaster Reduction Center of China Ministry of Civil Affairs of the People?s Republic of ChinaBeijing 100124P.R.China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875P.R.China

Digital Agriculture is one of the important applications of Digital *** the global climate changes and food security becomes an increasingly important issue,agriculture drought comes to the focus of *** is a typical monsoon climate country as well as an agricultural country with the world’s largest *** East Asian monsoon has had a tremendous impact upon agricultural ***,a maize drought disaster risk assessment,in line with the requirements of sustainable development of agriculture,is important for ensuring drought disaster reduction and food ***,soil,land use,and agro-meteorological observation information of the research area were collected,and based on the concept framework of‘hazard-inducing factors assessment(hazard)-vulnerability assessment of hazard-affected body(vulner-ability curve)-risk assessment(risk),’importing crop model EPIC(Erosion-Productivity Impact Calculator),using crop model simulation and digital mapping techniques,quantitative assessment of spatio-temporal distribution of maize drought in China was *** results showed that:in terms of 2,5,10,and 20 year return periods,the overall maize drought risk decreased gradually from northwest to southeast in the maize planting *** the 20 year return period,high risk value regions(drought loss rate]0.5)concentrate in the irrigated maize region of Northwest china,ecotone between agriculture and animal husbandry in Northern China,Hetao Irrigation Area,and north-central area of North China Plain,accounting for 6.41%of the total maize *** results can provide a scientific basis for the government’s decision-making in risk management and drought disaster prevention in China.

关键词： physical vulnerability risk assessment agriculture drought maize production EPIC model China Digital Earth GIS

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组织工程血管的研究进展

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现代仪器与医疗 2024年第4期30卷 1-9页

作者：智登科张靖爱程曲汉王恺孔德领领博生物科技(杭州)有限公司南开大学生命科学学院

心血管疾病已成为全球死亡的主要原因，血管移植术（置换/搭桥）是临床上治疗严重心血管疾病的有效手段。然而，迄今为止，临床上尚无可以医用的小口径人工血管产品。组织工程血管（Tissue-Engineered Vascular Graft,TEVG）因具有良好... 详细信息

心血管疾病已成为全球死亡的主要原因，血管移植术（置换/搭桥）是临床上治疗严重心血管疾病的有效手段。然而，迄今为止，临床上尚无可以医用的小口径人工血管产品。组织工程血管（Tissue-Engineered Vascular Graft,TEVG）因具有良好的生物相容性，能够促进组织再生、宿主整合以及血管功能的实现而受到研究者的青睐。本文简述近年TEVG的研究进展，简要介绍制备技术、分析存在的缺陷和改进方向，以期为TEVG的研究发展提供参考。

关键词：心血管疾病血管置换血管搭桥人工血管组织工程血管

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Climate change regionalization in China(1961–2010)

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Science China Earth Sciences 2014年第11期57卷 2676-2689页

作者： SHI PeiJun SUN Shao wang Ming LI Ning wang jingai JIN YunYun GU XiaoTian YIN WeiXia State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education Beijing Normal University Academy of Disaster Reduction and Emergency Management Ministry of Civil Affairs & Ministry of Education School of Geography Beijing Normal University Key Laboratory of Regional Geography Beijing Normal University

Since climatic condition is the important foundation for human subsistence and development and the key factor in sustainable development of economy and society, climate change has been a global issue attracting great attentions of politicians, scientists, governments, and the public alike throughout the world. Existing climate regionalization in China aims to characterize the re gional differences in climate based on years of the mean value of different climate indexes. However, with the accelerating climate change nowadays, existing climate regionalization cannot represent the regional difference of climate change, nor can it reflect the disasters and environmental risks incurred from climate changes. This paper utilizes the tendency value and fluc tuation value of temperature and precipitation from 1961 to 2010 to identify the climate change quantitatively, and completes the climate change regionalization in China （1961-2010） with county administrative regionalization as the unit in combination with China＇s terrain feature. Level-I regionalization divides China＇s climate change （1961-2010） into five tendency zones based on the tendency of temperature and precipitation, which are respectively Northeast China-North China warm-dry trend zone, East China-Central China wet-warm trend zone, Southwest China-South China dry-warm trend zone, Southeast Ti- bet-Southwest China wet-warm trend zone, and Northwest China-Qinghai-Tibet Plateau warm-wet trend zone; level-lI region- alization refers to fourteen fluctuation regions based on level-I regionalization according to the fluctuation of temperature and precipitation.

关键词： climate change regionalization temperature precipitation tendency fluctuation China

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THEORY AND PRACTICE FOR COMPILING THE ATLAS OF NATURAL DISASTERS IN CHINA

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Journal of Geographical Sciences 1994年第Z2期4卷 103-111页

作者： wang jingai(Department of Resources and Environmental Sciences, Bejing Normal University, Beijing 100875 People’s Republic of China)

This article inquires into theoretical and practical problems on compilation of an atlas of regional natural disasters. (1) The basic theory of compiling an atlas of regional disasters has been founded on the combination of the sciences of disasters, cartography and regional geogrphy. The content structure of a regional disaster atlas should be composed of at least the following five parts:hazard-formative environments and hazard-affected bodies,hazards, disaster effects, monitoring and warning system for natural disasters, and countermeasures for natural disaster reduction. (2) Contents of cartographic design of a regional disaster atlas should be composed of at least the following five parts: base map system, cartographic representation, Symbol System, color system, map edition and map layout system. (3) Based on theory and cartographic design of compiling an atlas of regional disaster, the Atlas of Natural Disater in China, which reveals objectively the temporal and spaial pattern of regional natural disasters of China,has been compiled and published.

关键词： atlas compilation natural disaster theory practice

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Effect of Lecithin on Safety of Composition B

Effect of Lecithin on Safety of Composition B

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2004安全科学与技术国际会议

作者： ZENG Qingguo1, wang Liqiong1, wang Xiaoning1, TIAN jingai1, ZHANG Ming2 & HUANG Yong2 (1 State Key Laboratory of Prevention and Control of Explosion Disasters, Beijing Institute of Technology, Beijing 100081, China) (2 Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China)

By means of experiments of emulsification, stability and observations of microscope photographs, it shows that mixture of NC and lecithin can emulsify wax very well in composition B. Two kinds of leci

关键词： dispersion and emulsification microstructure lecithin safety

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