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Simulating the transfer and fate of hexachlorocyclohexane in recent 50 years in beijing, china

Science china Earth Sciences 2005年第12期48卷 2203-2213页

作者： CAO Hongying1, LIANG Tao1 & TAO Shu2 1. Institute of Geographical Sciences and Natural Resources research, Chinese Academy of Sciences, beijing 100101, china 2. laboratory for Earth Surface Processes, Peking University, beijing 100871, china 1. Institute of Geographical Sciences and Natural Resources research Chinese Academy of Sciences 100101 Beijing China 2. laboratory for Earth Surface Processes Peking University 100871 Beijing China

Taking beijing as a study area, a dynamic fugacity model was used to simulate the transfer and fate of technical HCHs according to the physic-chemical properties of the studying environment and HCH isomers. Dynamic changes of the transfer fluxes and concentrations of HCH isomers during 1952―2003 were simulated and the model results suggest good agreement between the calculated and measured concentrations of HCH isomers. During 1952―1983, the average input and output amount of HCHs through agricultural application and degradation are 130 t and 150 t respectively. The dominant transfer processes of HCHs in the study area are air-soil deposition, soil erosion and soil-air diffusion, transfer fluxes of these processes are 80 t?a?1, 16 t?a?1 and 11 t?a?1, which account for 92% of total transfer fluxes of HCHs isomers. There were approximately 253t HCHs in all environmental compartments of the study area during this period and 97% of which existed in soil compartment. Air and water advection became the dominant input sources of HCHs after 1984 when the application of technical HCHs was prohib-ited, concentration of HCHs quickly descended to a quite low level in several years. Total amount of HCHs isomers remaining in the study area environment now is less than 5% that before 1983, and this percentage may descend to 0.5% after 20 years by prediction.

关键词： fugacity model, hexachlorocyclohexane, compartment, transfer flux, fate.

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Relationship between Environmental Pollution of Coal Mine and Spectral Characteristics of Nearby Plants

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Journal of University of Science and Technology beijing 2001年第1期8卷 10-14页

作者： Liqing Lei Institute of Geographic Sciences and Natural Resources research, Chinese Academy of Sciences, beijing 100101, china Chinese Acad Sci Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China

Remote sensing technology, as the most advanced method for collecting data, along with the common ways often used in the past on research of environmental science, was integrated to study the relationship between environmental pollution of coal mine and spectral characteristics of nearby plants. With compositive index and mean reflectivity at near infrared, a regression equation was established, and a conclusion was made that spectral reflectivity can be used to distinguish regions with different pollution degree. Through testing with real status of the research region, it is verified that this kind of integration and conclusion not only are helpful for human being in controlling the movement law of pollutants and the corresponding change of coal mine environmental quality but also bring a new way for the research of environment problems of coal mine.

关键词： remote sensing spectral characteristics reflectivity pollution index compositive index atmospheric pollution

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Gasflow style level posture sensor and angular velocity gyroscope assembled inertial sensor

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Progress in Natural Science:Materials International 2007年第8期17卷 971-978页

作者： Zhang Fuxue~(**) Mao Xu (research Centre of Sensor Technology,beijing Information Technology Institute,beijing 100101,china) [a]research Centre of Sensor Technology Beijing Information Technology Institute Beijing China

The compensational loop consisting of a gasflow style angular velocity gyroscope and gasflow level posture sensor is pro- posed to improve the signal of gasflow style *** compensational loop could remove acceleration interfere from the signal of *** assembled gasflow type inertial sensor not only measures static state angular,but also restrains the acceleration which interferes the output signal of level posture sensor in dynamic ***,the precision of outputs signal increases ***,the output sig- nal includes the angle velocity signal.

关键词： gasflow style inertia sensor

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第十一届江苏省园博园主展馆及傲途格酒店,南京,江苏,中国

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世界建筑 2024年第4期 58-59页

作者： china Architecture Design & research Group 中国建筑设计研究院有限公司

项目选址在南京汤山一处始建于1970年代的水泥厂遗址。总建筑面积50,000m^(2),包括园艺主展馆建筑群,以及为庆典后场馆持续运营服务的五星级度假酒店,同时对基地现存的工业遗产建筑进行选择性修复和景观改造。设计采用“轻介入”的设计... 详细信息

项目选址在南京汤山一处始建于1970年代的水泥厂遗址。总建筑面积50,000m^(2),包括园艺主展馆建筑群,以及为庆典后场馆持续运营服务的五星级度假酒店,同时对基地现存的工业遗产建筑进行选择性修复和景观改造。设计采用“轻介入”的设计策略,依托场地内多样的工业建筑遗存和丰富的高差,以纤细的钢构装配体系实现轻盈的现代化展厅群落,使绿色的艺术花园弥漫萦绕在粗粝的工业厂房之间,用绿色空间弥合工业生产对山体和自然产生的破坏。

关键词：工业生产绿色空间项目选址景观改造南京汤山主展馆工业厂房设计策略

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Report on Cardiovascular Health and Diseases in china 2023:An Updated Summary

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Biomedical and Environmental Sciences 2024年第9期37卷 949-992页

作者： National Center for Cardiovascular Diseases The Writing Committee of the Report on Cardiovascular Health and Diseases in china Shengshou Hu .

Since 1990,china has made considerable progress in resolving the problem of“treatment difficulty”of cardiovascular diseases(CVD).The prevalent unhealthy lifestyle among Chinese residents has exposed a massive proportion of the population to CVD risk factors,and this situation is further worsened due to the accelerated aging population in *** remains one of the greatest threats to the health of Chinese *** terms of the proportions of disease mortality among urban and rural residents in china,CVD has persistently ranked *** 2021,CVD accounted for 48.98%and 47.35%of deaths in rural and urban areas,*** out of every five deaths can be attributed to *** implement a national policy“focusing on the primary health institute and emphasizing prevention”and truly achieve a shift of CVD prevention and treatment from hospitals to communities,the National Center for Cardiovascular Diseases has organized experts from relevant fields across china to compile the“Report on Cardiovascular Health and Diseases in china”annually since *** 2024 report is established based on representative,published,and high-quality big-data research results from cross-sectional and cohort population epidemiological surveys,randomized controlled clinical trials,large sample registry studies,and typical community prevention and treatment cases,along with data from some projects undertaken by the National Center for Cardiovascular *** firsthand data not only enrich the content of the current report but also provide a more timely and comprehensive reflection of the status of CVD prevention and treatment in china.

关键词： Cardiovascular disease Risk factor Prevalence Mortality Rehabilitation Basic research Medical device development Health economics

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成寿寺集体土地租赁住房,北京,中国

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世界建筑 2024年第4期 98-99页

作者： china Architecture Design ＆ research Group 中国建筑设计研究院有限公司

成寿寺社区是北京市首个开工并运营的集体土地租赁住房项目。该项目面向青年客群。设计从“城市空间关系”和“居住行为需求”两个维度去思考和切入,使这个居住项目更具设计性和研究性。设计打破目前住宅区设计完全依据产品和日照自成... 详细信息

成寿寺社区是北京市首个开工并运营的集体土地租赁住房项目。该项目面向青年客群。设计从“城市空间关系”和“居住行为需求”两个维度去思考和切入,使这个居住项目更具设计性和研究性。设计打破目前住宅区设计完全依据产品和日照自成孤岛、与城市割裂的模式,从城市设计、建筑形态、街道环境、内部空间来塑造整体建筑群,使其融入城市,成为街区有机的整体,并激发带动区域活力。

关键词：居住行为建筑形态租赁住房住宅区设计集体土地街道环境居住项目内部空间

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Helping Chinese Brands Go Global

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china Today 2024年第7期73卷 60-61页

作者： INTERNATIONAL COMMUNICATION COMMITTEE OF THE china ADVERTISING ASSOCIATION INTERNATIONAL COMMUNICATION COMMITTEE OF THE china ADVERTISING ASSOCIATION

The activity organized by Navigator has enhanced Chinese enterprises’understanding of the strategy of brands going *** is a research institute built by the International Communication Committee(ICC)of the china Advertising Association devoted to assisting Chinese brands go *** first activity was held at Huawei's headquarters in Shenzhen,aimed at helping the internationalization of Chinese brands.

关键词： Brand enterprises devoted

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Ecological hydraulic radius model to calculate instream flow requirements for transporting sediment in the western water transfer region

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Science china(Technological Sciences) 2009年第11期52卷 3401-3405页

作者： MEN BaoHui1 & LIU ChangMing2 1 Renewable Energy Institute, North china Electric Power University, beijing 102206, china 2 Key laboratory of Water Cycle and Related Land Surface Process, Institute of Geographical Sciences and Natural Resources research, Chinese Academy of Sciences, beijing 100101, china 1. Renewable Energy Institute North China Electric Power University Beijing 102206 China 2. Key laboratory of Water Cycle and Related Land Surface Process Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China

Transporting sediment is a natural function of the river. To maintain the normal evolution of the river certain amount of water flow is required, which is called the instream flow requirements for transporting sediment (IFRTS). We defined the permitting flow velocity by the conception of IFRTS, and also put forward the ecological hydraulic radius model (EHRM) to estimate IFRTS. The calculating process of EHRM is explained by the example of Daofu Hydrological Station on Xianshui branch of Yalong River in the west line first-stage construction of South-North Water Transfer Project. The result shows that the IFRTS occupied 29.7%―59.5% of annual mean discharge in flood season, the average of IFRTS was about 100.2 m3/s during 1966―1987, it is close to the IFRTS 90 m3/s calculated by IFRTS conception. Hence, it is feasible to use EHRM to calculate IFRTS.

关键词： ecological hydraulic radius model (EHRM) instream flow requirements for transporting sediment (IFRTS) permitting flow velocity ecological hydraulic radius for transporting sediment

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Hydraulic characteristics of converse curvature section and aerator in high-head and large discharge spillway tunnel

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Science china(Technological Sciences) 2011年第S1期54卷 33-39页

作者： LIU ZhiPing 1,2,ZHANG Dong 2,ZHANG HongWei 2 &WU YiHong 1,2 1 State Key laboratory of Simulation and Regulation of Water Cycle in River Basin,beijing 100038,china 2 china Institute of Water Resources and Hydropower research,beijing 100038,china 1. State Key laboratory of Simulation and Regulation of Water Cycle in River Basin Beijing 100038 China2. China Institute of Water Resources and Hydropower Research Beijing 100038 China

The hydraulic characteristics and cavitation erosion near the converse curvature section in the high-head and large discharge spillway tunnel have been important issues of concern to the hydropower *** this paper,the evolutions of hydraulic elements such as pressure,flow velocity,wall shear stress,*** the converse curvature section are analyzed and the impacts of bottom aerator on hydraulic characteristics are discussed,with the commercial software FLUENT6.3 as a platform and combining the k-model and VOF *** flow pattern in the converse curvature section of spillway tunnel is given by the three-dimensional numerical *** indicates that the pressure changes rapidly with great pressure gradient from the beginning to the end of the *** also shows that the shear stress on side wall just downstream the end of the converse curvature curve is still increasing;the aeration cavity formed downstream the bottom aerator may cause the side wall pressure decreased to worsen the cavitation characteristics near the side *** means of the physical model experiment,the three-dimensional aerator composed of side wall baffling aerator and bottom aerator is studied,the baffling aerator suitable for the water flow conditions with water depth of 6.0 to 8.0 m and flow velocity of 35 to 50 m/s is proposed.

关键词： spillway tunnel baffling aerator converse curvature section hydraulic characteristics

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Progress and review of the studies on the end-Triassic mass extinction event

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Science china Earth Sciences 2005年第12期48卷 2049-2060页

作者： DENG Shenghui1,2, LU Yuanzheng1,2,3 & XU Daoyi4 1. research Institute of Petroleum Exploration and Development, beijing 100083, china 2. Key laboratory of Oil and Gas Reservoir of Petrochina, beijing 100083, china 3. china University of Geosciences, beijing 100083, china 4. Institute of Geology, china Earthquake Administration, beijing 100029, china 1. research Institute of Petroleum Exploration and Development 100083 Beijing China 2. Key laboratory of Oil and Gas Reservoir of Petrochina 100083 Beijing China 3. china University of Geosciences 100083 Beijing China 4. Institute of Geology China Earthquake Administration 100029 Beijing China

The mass extinction at the end-Triassic is one of the five biggest in the Phanerozoic. However,it is the least well understood among these five events, and only till last decade it became a great academic interesting subject to geologists. The evidences for this event come obviously from bivalves, brachiopods, ammonites, corals, radiolaria, ostracods and foraminifera of marine habitats, and plants and tetrapods of terrestrial realm. By contrast, for some of other groups, such as marine gastropods and marine vertebrates, no mass extinction has been recog-nized yet. The extinction event is strongly marked at specific level but shown a complicated situa-tion at generic and family levels. Dramatic changing of the environment, such as the temperature raise due to the greenhouse effect, the marine anoxic habitats caused by a sudden transgression after the regression at the end of Triassic, has been claimed to be the main cause of the extinction. Many hypotheses have been suggested to demonstrate the mechanisms of the environment changing, among which two popular ones are the bolide impact and volcanic eruption. The Triassic-Jurassic (Tr-J) boundary mass extinction event is still poorly understood because no enough data have been obtained from the Tr-J boundary successional sections of both marine and terrestrial sediments, and most of these studies were regionally restricted. The basic aspects of the event and its associated environmental conditions remain poorly characterized and the causal mechanism or mechanisms are equivocal. Some authors even doubt its occurrence. china has many successionally developed terrestrial and marine Tr-J sections. Detailed studies of these sections may be important and significant for well understanding of the event.

关键词： progress, review, end-Triassic, mass extinction, mechanism, Tr-J boundary.

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