检索结果-南通市图书馆

Development Zones and Evolvement of Urban Spatial Structure: A Case Study on lanzhou City

在线全文

学校读者我要写书评

暂无评论

China City Planning Review 2009年第4期18卷 35-41页

作者： ZHANG Zhibin, Professor, College of Geography and Environment Science, Northwest Normal University, lanzhou, P. R. China. SHI Anlong, Postgraduate Student, College of Geography and Environment Science, Northwest Normal University, lanzhou, P. R. China SHI Ke

In the 20 years since they first emerged as influential elements in urban China, development zones have become an impor tant factor in promoting the spatial optimization of urban

关键词： lanzhou District expand Chongqing emerged resident

SUBSIDENCE AND DIFFUSION OF ELEVATED RELEASE SOURCES OVER THE VALLEY CITY lanzhou

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1984年第10期29卷 1370-1374页

作者：陈长和黄建国施介宽郦桂芬彭楚渊 lanzhou University Gansu Provincial Institute of Environment Protection Northwest Power Designing Institute

The proposed second lanzhou heat and power plant is to centralize winter heat supply and to discharge waste gases with a high chimney so as to ease air pollution in winter. In the winter of 1980, experiments were carried out to assess the impact of the proposed second lanzhou heat and power plant (the proposed plant for short) on the atmospheric environment of the urban areas.

关键词： winter lanzhou gases mountains altitude OVER apparently aerial winds neutral

在线全文

学校读者我要写书评

暂无评论

Author Spotlight

CCS Chemistry 2024年第3期6卷 532-536页

Yanli Tang(唐艳丽)Prof.Tang received her B.S.degree in chemical engineering in 2001 from the Department of Chemistry and Chemical Engineering at Henan University,China,and her M.S.degree in chemistry in 2004 from Lanz... 详细信息

关键词： Henan lanzhou Spotlight

THE NECESSARY AND SUFFICIENT CONDITIONS FOR LIPSCHITZ LOCAL HOMEOMORPHISM

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 1992年第1期13卷 40-45页

作者：范先令 Department of Mathematics Lanzhou UniversityLanzhou 730000GansuChina.

For a locally Lipschitz map f:Rn→En,the well known inverse function theoremgives a sufficient condition for f to be a Lipschitz local homeomorphims at a point x0,that is,（?）f（x0）is invertible.In this paper,it is ... 详细信息

关键词： LOCAL inverse locally neighborhood satis assume valid proof 十布 lanzhou

Concentrations and light absorption properties of PM_(2.5) organic and black carbon based on online measurements in lanzhou, China

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2023年第9期131卷 84-95页

作者： Pengfei Chen Shichang Kang Qinyi Gan Ye Yu Xianlei Yuan Yajun Liu Lekhendra Tripathee Xiaoxiang Wang Chaoliu Li State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)Lanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions Northwest Institute of Eco-Environment and ResourcesCASLanzhou 730000China Xinjiang Bayingolin Mongolian Autonomous Prefecture Meteorological Bureau Korla 841000China

To elucidate the variations in mass concentrations of organic carbon(OC)and black carbon(BC)in PM_(2.5) and their light absorption characteristics in lanzhou,we conducted one-year online measurements by using a newly developed total carbon analyzer(TCA08)coupled with an aethalometer(AE33)from July 2018 to July 2019.The mean OC and BC concentrations were 6.4±4.4 and 2.0±1.3μg/m^(3),respectively.Clear seasonal variations were observed for both components,with winter having the highest concentrations,followed by autumn,spring,and summer.The diurnal variations of OC and BC concentrations were similar throughout the year,with daily two peaks occurring in the morning and evening,respectively.A relatively low OC/BC ratio(3.3±1.2,n=345)were observed,indicating that fossil fuel combustion was the primary source of the carbonaceous components.This is further substantiated by relatively low biomass burning contribution(f_(biomass):27.1%±11.3%)to BC using aethalometer based measurement though f_(biomass) value which increased significantly in winter(41.6%±5.7%).We estimated a considerable brown carbon(BrC)contribution to the total absorption coefficient(b_(abs))at 370 nm(yearly average of 30.8%±11.1%),with a winter maximum of 44.2%±4.1%and a summer minimum of 19.2%±4.2%.Calculation of the wavelength dependence of total b_(abs) revealed an annual mean AAE_(370-520) value of 4.2±0.5,with slightly higher values in spring and winter.The mass absorption cross-section of BrC also exhibited higher values in winter,with an annual mean of 5.4±1.9 m^(2)/g,reflecting the impact of emissions from increased biomass burning on BrC concentrations.

关键词： Black carbon Brown carbon Light absorption Source lanzhou

Study on Strip-shaped City Agglomeration in Upstream Area of Yellow River

在线全文

学校读者我要写书评

暂无评论

China City Planning Review 2007年第1期16卷 40-48页

作者： LI Mingji, Lecturer, College of Resources and Environment, Ningxia University, Yinchuan, P. R. China. SHI Peiji, Professor, Dean of College of Geography and Environment, Northwest Normal University, lanzhou, P. R. China.QIAN Fang

As a new kind of spatial structure, the strip-shaped city agglomeration has been concerned by the academic world – . There are many studies focusing on the spatial structure of city agglomerations in the developed ar... 详细信息

关键词： shaped agglomeration upstream lanzhou concerned Ba

Caution on Planning NBR Projects

在线全文

学校读者我要写书评

暂无评论

China Chemical Reporter 2010年第4期21卷 28-29页

作者： Liang Tao,PetroChina lanzhou Research Center of Chemical Industry

With the rapid development of China’s automobileindustry,the consumption of automobilecomponents has increased remarkably andthe quality requirements on components havealso become more stringent.There is also thedevelopment of other application sectors suchas electric wires/cables,adhesives and printingrubber rollers.The demand for acrylonitrilebutadienerubber (NBR) in China has thereforegrown rapidly and the average annual con-

关键词： stringent rubber butadiene lanzhou resins remarkab

TRITIUM CONTENT OF SNOW-ICE SAMPLES IN THE AREAS OF HARS GLACIER IN ALTAI MOUNTAINS AND GLACIER No. 1 AT THE SOURCE OF RMQI RIVER

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1984年第1期29卷 83-87页

作者：王平骆洪珍林瑞芬卫克勤王志祥 lanzhou Institute of Glaciology and Cryopedology Academia Sinica Guiyang Institute of Geochemistry Academia Sinica

Natural cosmogenic tritium or artificial tritium from thermonuclear tests takes the form of HTO to circulate. Before thermonuclear tests, the tritium content in precipitation was meagre, mean value 5—10 TU. After 1954, however, great influence has apparently been exerted by artificial tritium from numerous thermonuclear tests. In 1963,

关键词： apparently numerous SOURCE MQI RIVER Nanjing Tianshan lanzhou latitude outside exerted

Biological Effects of Endosperm of Triticum aestivum L Implanted by Energetic Heavy Ions

在线全文

学校读者我要写书评

暂无评论

IMP & HIRFL Annual Report 2001年第1期 68-69页

作者： Wei Zengquan, Li Xinglin, Wang Xiaojuan, Gao Qingxiang, Wang Yafub Xie Zhongkui, Xie Hongmeia and Li Wenjiana State Key Laboratory of Arid Agroecology, lanzhou University, lanzhou 730000, P.R.China.Gaolan Station of Ecological Agriculture, lanzhou Branch, the Chinese Academy of Sciences, 730200, P.R.China.School of Life Sciences, lanzhou University, lanzhou, China.

36 MeV/u^(16)O^(8+)ion beams with different doses were used to implant into endosperms of seeds of cultivars 86336 and 14615,spring wheat(Triticum aestivum L.).The ions with 1×10~7,5×10~7,and 1×10~8 ion/cm2~ were f... 详细信息

关键词： Triticum implant wheat grafting chromosomal aberration biochemical irradiated doses lanzhou