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Changes of Population, Built-up Land, and Cropland Exposure to Natural Hazards in China from 1995 to 2015

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International Journal of Disaster Risk Science 2019年第4期10卷 557-572页

作者： Yimin Chen Wei Xie Xiaocong Xu School of Geography and Planning Sun Yat-sen UniversityGuangzhou 510275China Guangdong Key Laboratory for Urbanization and Geosimulation Sun Yat-sen UniversityGuangzhou 510275China

By using the latest China population grid and land-use data,we assess the changing exposure of China’s population and land uses to the hazards of storm surges,droughts,earthquakes,floods,and landslides from 1995 to2015.We found that the single-hazard areas and the multihazard areas covered 43%and 26%of China’s territory,respectively.Population grew faster in the hazard-prone areas than in the non-hazard areas.Built-up area expanded more rapidly in the areas prone to earthquakes and landslides.Cropland changed rapidly in many hazard-prone areas.The hazard-prone areas affected by floods featured the highest cropland loss rates,while the areas prone to earthquakes and landslides featured the highest cropland growth rates.We detected areas with significant exposure changes by using hot spot analysis.It was found that population and built-up land in the Pearl River Basin were increasingly exposed to storm surges,floods,and landslides.The Haihe River Basin and Huaihe River Basin also showed a consistent increase of population and built-up land exposure to droughts and earthquakes.These findings can provide a foundation for the design and implementation of protection and adaptation strategies to improve the resilience of Chinese society to Natural hazards.

关键词： China Exposure to Natural hazards Population change Built-up land Cropland

Fabrication of Rice Husk Ash/Natural Rubber Composites by the Latex Process

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Journal of Wuhan University of Technology(Materials Science) 2020年第1期35卷 42-46页

作者：曾宗强 LI Yongzhen ZHAO Pengfei 余和平 Key Laboratory of Tropical Crop Product Processing Ministry of Agriculture and Rural Affairs of the People’s Republic of ChinaAgricultural Product Processing Research InstituteChinese Academy of Tropical Agricultural SciencesZhanjiang 524001China Rubber Research Institute Chinese Academy Of Tropical Agricultural Sciences Danzhou 571731China

Rice husk ash/Natural rubber composites were fabricated by modifying rice husk ash with the rare earth coupling agent DN-8102. The structure of the rice husk ash and the morphological dispersion of the rice husk ash in a rubber matrix were charactered by scanning and transmission electron microscopy, respectively.The mechanical properties of the composites were experimentally studied. The surface energy and the interaction between rice husk ash particles can be reduced by surface modification of rice husk ash with a rare earth coupling agent, which reduces the agglomeration of rice husk ash in both liquid and rubber matrices and enhances the interactions between rice husk ash and the rubber phase, and thus results in improved mechanical properties for the resulting rice husk ash/Natural rubber composite. The modulus of the composites will increase as the loading level of modified rice husk ash increases. A maximum tensile strength of 25.96 MPa for the composites can be obtained when the modified rice husk ash loading level is 4%.

关键词： Natural rubber rice husk ash composite

青藏高原边界地区天然水的水化学性质及其成因（英文）

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Journal of Geographical Sciences 2019年第11期29卷 1876-1894页

作者：田原余成群查欣洁高星戴尔阜 Lhasa National Ecological Research Station Key Laboratory of Ecosystem Network Observation and ModellingInstitute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China

The special geography and human environment of the Qinghai-Tibet Plateau has created the unique hydrochemical characteristics of the region’s Natural water,which has been preserved in a largely Natural state.However,as the intensity of anthropogenic activities in the region has continued to increase,the water environment and hydrochemical characteristics of the Qinghai-Tibet Plateau have altered.In this study,water samples from the western,southern,and northeastern border areas of the Qinghai-Tibet Plateau,where human activities are ongoing,were collected,analyzed,and measured.The regional differences and factors controlling them were also investigated.The key results were obtained as follows.(1) Differences in the physical properties and hydrochemical characteristics,and their controlling factors,occurred in the different boundary areas of the Qinghai-Tibet Plateau.These differences were mainly the consequence of the geographical environment and geological conditions.(2) The water quality was good and suitable for drinking,with most samples meeting GB (Chinese national) and WHO (World Health Organization) drinking water standards.(3) The chemical properties of water were mainly controlled by the weathering of carbonates and the dissolution of evaporative rocks,with the former the most influential.(4) The biological quality indicators of Natural water in the border areas were far superior to GB and WHO drinking water standards.

关键词： border area of the Qinghai-Tibet Plateau Natural water hydrochemical characteristics controlling factors

Natural products as a crucial source of anti-inflammatory drugs: recent trends and advancements

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Traditional Medicine Research 2019年第5期4卷 257-268页

作者： Yan-Hang Wang Ke-Wu Zeng State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Beijing China

Natural active molecules are key sources of modern innovative drugs. Particularly, a great amount of Natural active molecules have been reported to possess promising therapeutic effects on inflammatory diseases, including asthma, rheumatoid arthritis, hepatitis, enteritis, metabolic disorders and neurodegenerative diseases. However, these Natural active molecules with various molecular structures usually exert anti-inflammatory effects through diversiform pharmacological mechanisms, which is necessary to be summarized systematically. In this review, we introduced the current major anti-inflammatory Natural active molecules based on their chemical structures, and discussed their pharmacological mechanisms including anti-inflammatory molecular signaling pathways and potential target proteins, which providing a referential significance on the development of novel anti-inflammatory drugs, and also revealing new therapeutic strategies for inflammatory diseases.

关键词： Natural products Anti-inflammation Traditional Chinese medicine Mechanism of action Drug target

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液化天然气池火固体火焰模型及预测工具

消防科学与技术 2015年第1期34卷 120-122页

作者：刘昌华党文义化学品安全控制国家重点实验室山东青岛266071 中国石油化工股份有限公司青岛安全工程研究院山东青岛266071

通过对陆上和水上LNG大尺寸火灾实验测试结果进行分析,得到影响LNG池火灾热辐射的关键参数,包括最大燃烧速率、最大表面热辐射能及LNG池火燃烧速率、表面热辐射能、火焰形状和传输率预测模型,并据此开发了基于固体火焰模型的LNG池火热... 详细信息

通过对陆上和水上LNG大尺寸火灾实验测试结果进行分析,得到影响LNG池火灾热辐射的关键参数,包括最大燃烧速率、最大表面热辐射能及LNG池火燃烧速率、表面热辐射能、火焰形状和传输率预测模型,并据此开发了基于固体火焰模型的LNG池火热辐射预测工具LNGFHR。与LNGFIRE 3模型的计算结果进行对比,表明LNGFHR在陆上圆形LNG池火灾热辐射预测值与LNGFIRE 3接近;对于水面LNG池火,LNGFHR采用了最新的大尺寸LNG水面池火实验的研究结果,其预测结果大于LNGFIRE 3模型的预测值。

关键词：液化天然气 LNG池火热辐射安全评估固体火焰模型 LNGFIRE 3 liquefied Natural gas (LNG) LNGFIRE 3

Research on the effect of Reynolds correlation in Natural convection film condensation

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Nuclear Science and Techniques 2017年第6期28卷 169-178页

作者： Lei Wu Hai-Jun Jia Xi-Zhen Ma Yang Liu Xing-Tuan Yang Jun Wang Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua University Engineering Physics Institute University of Wisconsin Madison

Film condensation is a vital phenomenon in the nuclear engineering applications,such as the gas-steam pressurizer design,and heat removing on containment in the case of postulated accident.Reynolds number in film condensation can be calculated from either the mass relation or the energy relation,but few researches have distinguished the difference between them at present.This paper studies the effect of Reynolds correlation in the Natural convection film condensation on the outer tube.The general forms of the heat transfer coefficient correlation of film condensation are developed in different flow regimes.By simultaneously solving a set of the heat transfer coefficient correlations with Re_(mass) and Re_(energy),the general expressions for Re_(mass) and Re_(energy) and the relation between the corresponding heat transfer coefficients are obtained.In the laminar and wavefree flow regime,Re_(mass) and Re_(energy) are equivalent,while in the laminar and wavy flow regime,Re_(mass) is much smaller than Re_(energy),and the deviation of the corresponding average heat transfer coefficients is about 30% at the maximum.In the turbulent flow regime,the relation of Re_(mass) and Re_(energy)is greatly influenced by Prandtl number.The relative deviation of their average heat transfer coefficients is the nonlinear function of Reynolds number and Prandtl number.Compared with experimental results,the heat transfer coefficient calculated from Re_(energy) is more accurate.

关键词： Film condensation Reynolds correlation Heat transfer coefficient Natural convection

Advances in research on the anticancer mechanism of the Natural compound cucurbitacin from Cucurbitaceae plants:a review

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Traditional Medicine Research 2019年第2期4卷 68-81页

作者： Jing Liang Dan Chen Department of Pharmacology School of Basic Medical Sciences Tianjin Medical University Tianjin China

Cucurbitacins are highly oxidized tetracyclic triterpenoids that are widely found in plants belonging to Cucurbitaceae family and exert various pharmacological effects.Many cucurbitacin derivatives are available,of which cucurbitacins B,D,E,and I are important members of the cucurbitacin family and exert anticancer effects against various cancers.This review summarizes the advances in research on cucurbitacins B,D,E,and I in inducing tumor cell apoptosis,cytoskeletal destruction,cell cycle arrest,and autophagy and in regulating various cancer-related signaling pathways.In addition,this review summarizes the latest research on the synergistic effects of the combination of cucurbitacins and clinically approved chemotherapeutic drugs.The findings summarized in this review suggest that cucurbitacins are multi-targeting and multi-functional anticancer drugs and that their complex anticancer mechanisms should be examined in future studies.Because of their proven benefits,cucurbitacins have the potential to be used as anticancer drugs in the clinical setting.

关键词： Natural compound Cucurbitacins Anticancer

Identifying multi-component drug candidates in Natural products via association rule mining

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中国药理学与毒理学杂志 2015年第S1期29卷 99-100页

作者： SuhyunHA KyungrinNOH MoonshikSHIN SunyongYOO JaejoonCHOI HojungNAM DoheonLEE Department of Bio and Brain Engineering Korea Advanced Institute of Science and Technology Daejeon 305-701 South Korea School of Information and Communications Gwangju Institute of Science and Technology Gwangju 500-712 South Korea

OBJECTIVE To identify compound combinations as candidate multi-component drugs for the type 2 diabetes from Natural product information.METHODS Chemical composition information of herbs in Natural medicine was acquired by integrating conventional databases;Traditional Chinese Medicine Information Database(TCM-ID)and Traditional Chinese Medicine Integrated Database(TCMID).Therapeutic effect of each herb on the type 2 diabetes was examined by analyzing annotated function information with a text-mining method.The Apriori algorithm,which is a classical method for extracting associations between object in large-scale databases,was employed to infer association rules between compound combinations and therapeutic effect on the target disease.The chemical composition and therapeutic information of each herb was used as a transaction,which consists of the chemical compound combination as an antecedent item set and the therapeutic effect as a consequent item.The association rules with high support and confidence value were suggested as candidate multi-component drugs for the type 2 diabetes.RESULTS Totally 40 941 association rules were inferred with support lower bound 0.05% and maximum rule length 4.With respect to support and confidence,the top-ranked compound combination was puerarin and daidzin(support=0.15%,confidence=100%).In addition,the top 16 compound combinations were composed of 11 individual chemical compounds;puerarin,daidzin,abscisic acid,batatisine,dopamine,cholesterol,daidzein,gamma-aminobutyric acid,stigmasterol,campesteryl ferulate,and campesterol.To validate therapeutic effect of the proposed compound combinations,literature evidences of each individual compound were investigated.Among the 11 individual compounds,six compounds were reported to be effective for the treatment of the diabetes mellitus.CONCLUSION By analyzing Natural product in formation with association rule mining,16 compound combinations are suggested as candidate multi-component drugs for the type 2 diabetes.These compound combinations a

关键词： polypharmacology Natural products association rule

Flow characteristics of Natural circulation in a lead–bismuth eutectic loop

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Nuclear Science and Techniques 2017年第3期28卷 97-103页

作者： Chen-Chong Yue Liu-Li Chen Ke-Feng Lyu Yang Li Sheng Gao Yue-Jing Liu Qun-Ying Huang School of Nuclear Science and Technology University of Science and Technology of China Key Laboratory of Neutronics and Radiation Safety Institute of Nuclear Energy Safety Technology Chinese Academy of Sciences

Lead and lead-alloys are proposed in future advanced nuclear system as coolant and spallation target.To test the Natural circulation and gas-lift and obtain thermal-hydraulics data for computational fluid dynamics(CFD) and system code validation, a lead–bismuth eutectic rectangular loop, the KYLIN-Ⅱ Thermal Hydraulic Natural circulation test loop, has been designed and constructed by the FDS team. In this paper, theoretical analysis on Natural circulation thermal-hydraulic performance is described and the steady-state Natural circulation experiment is performed. The results indicated that the Natural circulation capability depends on the loop resistance and the temperature and center height differences between the hot and cold legs. The theoretical analysis results agree well with,while the CFD deviate from, the experimental results.

关键词： Accelerator-driven systems Lead–bismuth eutectic Natural circulation CFD