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A Great Across-the-Century Planning to Build Modernized Capital——The Revision of beijing city Overall Plan

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China city Planning Review 1993年第4期10卷 2-6页

作者： Ke Huanzhang beijing Institute of Urban Planning and Design

The revision work of the overall plan from 1991 to1992 under the auspices of the beijing Institute of Planning and Design(BIPD) has been completed in an all-round *** article sums upthose background conditions,guiding... 详细信息

关键词： Rev The Revision of beijing city Overall Plan A Great Across-the-Century Planning to Build Modernized Capital

Views　on　Three　Milestones　in　the　Construction　of　beijing　city

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China city Planning Review 1995年第3期12卷 26-32页

作者： Hou Renzhi (Academician, Chinese Academy of Science and Professor, beijing University)

ＶｉｅｗｓｏｎＴｈｒｅｅＭｉｌｅｓｔｏｎｅｓｉｎｔｈｅＣｏｎｓｔｒｕｃｔｉｏｎｏｆＢｅｉｊｉｎｇＣｉｔｙ￥ＨｏｕＲｅｎｚｈｉ（Ａｃａｄｅｍｉｃｉａｎ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅａｎｄＰｒｏｆｅｓｓ... 详细信息

ＶｉｅｗｓｏｎＴｈｒｅｅＭｉｌｅｓｔｏｎｅｓｉｎｔｈｅＣｏｎｓｔｒｕｃｔｉｏｎｏｆＢｅｉｊｉｎｇＣｉｔｙ￥ＨｏｕＲｅｎｚｈｉ（Ａｃａｄｅｍｉｃｉａｎ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅａｎｄＰｒｏｆｅｓｓｏｒ，ＢｅｉｊｉｎｇＵｎｉｖｅｒｓ...

关键词： Milestone

The diurnal and seasonal characteristics of urban heat island variation in beijing city and surrounding areas and impact factors based on remote sensing satellite data

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Science China Earth Sciences 2005年第Z2期48卷 220-229页

作者： ZHANG Jiahua, HOU Yingyu, LI Guicai, YAN Hao YANG Limin & YAO Fengmei The Chinese Academy of Meteorological Sciences, beijing 100081, China The National Meteorological Center, beijing 100081, China The National Satellite Meteorological Center, beijing 100081, China Joint Laboratory for Geoinformation Science, The Chinese University of Hong Kong, Hong Kong, China Department of Geosciences, Graduate School of Chinese Academy of Sciences, beijing 100039, China The Chinese Academy of Meteorological Sciences Beijing 100081 China The National Meteorological Center Beijing 100081 China The National Satellite Meteorological Center Beijing 100081 China Joint Laboratory for Geoinformation Science The Chinese University of Hong Kong Hong Kong China

Based on the land surface temperature (LST), the land cover classification map,vegetation coverage, and surface evapotranspiration derived from EOS-MODIS satellite data, and by the use of GIS spatial analytic technique and multivariate statistical analysis method, the urban heat island (UHI) spatial distribution of the diurnal and seasonal variabilities and its driving forces are studied in beijing city and surrounding areas in 2001. The relationships among UHI distribution and landcover categories, topographic factor, vegetation greenness, and surface evapotranspiration are analyzed. The results indicate that: (i) The significant UHI occur in beijing city areas in the four seasons due to high heat capacity and multi-reflection of compression building, as well as with special topographic features of its three sides surrounded by mountains,especially in the summer. The UHI spatial distribution is corresponding with the urban geometry structure profile. The LST difference is approximately 4-6℃ between beijing city and suburb areas, comparatively is 8- 10℃ between beijing city area and outer suburb area in northwestern regions. (ii) The UHI distribution and intensity in daytime are different from nighttime in beijing city area, the nighttime UHI is obvious. However, in the daytime, the significant UHI mainly appears in the summer, the autumn takes second place, and the UHI in the winter and the spring seem not obvious. The surface evapotranspiration in suburb areas is larger than that in urban areas in the summer, and high latent heat exchange is evident, which leads to LST difference between city area and suburb area. (iii) The reflection of surface landcover categories is sensitive to the UHI, the correlation between vegetation greenness and UHI shows obviously *** scatterplot shows that there is the negative correlation between NDVI and LST (R2 = 0.6481).The results demonstrate that the vegetation greenness is an important factor for reducing the UHI,and la

关键词： urban heat island, vegetation cover, LST, MODIS, beijing city and surrounding areas.

Relationship between Tourism Development and Ecological Protection in Songshan National Nature Reserve,beijing city

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Chinese Forestry Science and Technology 2008年第2期7卷 72-77页

作者： CHEN Liang1 ZHAO Chun1 HUANG Weiping2 1. Department of Economics and Management, beijing Forestry University, beijing 100083, P. R. China 2. English Department, Dalian University of Foreign Language, Dalian 116044, P. R. China

Nowadays Songshan National Nature Reserve attracts a rapidly increasing number of tourists. However, the development of a tourist economy and the further exploitation of the natural landscape threaten the ecology and management of the reserve. Therefore, defining the relationship between ecological tourism and ecological protection can provide a framework for the management and exploitation of the reserve. Based on the analysis of current situation and questions of the reserve, this paper probes into the relationship between tourism development and ecological protection. Furthermore, it provides specific measures and suggestions for the existing problems.

关键词： tourism development ecological protection Songshan National Nature Reserve

Development and Utilization of the Underground Space of the conservation districts of historic sites in the Old city of beijing——Opportunities and Challenges

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Development and Utilization of the Underground Space of the ...

Analysis on background magnetic field to generate eddy current by pulsed gradient of permanent-magnet MRI

第12届国际地下空间联合研究中心年会

作者： Chen Jun①Planner and Chinese Registered Planner of beijing Municipal Institute of city Planning and Design(BICP) Urban Design Department China

＜正＞beijing is a world famous ancient city and a renowned national historic *** old city lies in the heart of beijing city and is an intensive reflection of the urban nature and characteristics of *** the old city,there are currently 33 conservation districts of historic sites（"Conservation districts"）,accounting for about 33%of the total area of the old city and constituting an important part of the famous historical and cultural city. Some of the Conservation districts have now shown signs of decay and feature a urgent need to improve the municipal infrastructure conditions,a high population density and worsening shortage of land *** development and utilization of underground space for effective expansion of the spatial resources of the Conservation districts will create conditions for improving the ageing municipal facilities,easing up the strains of ground transport and protecting and sustaining the traditional scenes. In recent years,large-scale planning and construction of track traffic have provided a good opportunity for the development and utilization of the underground space of the Conservation ***,the efforts face serious challenges due to the harsh requirements for the protection and renovation of the Conservation districts on the one hand and,on the other hand,the fact that a good mode for implementation of the protection and renovation of the Conservation districts in the old city has yet to materialize. This article roughly classifies the Conservation districts into three types according to their primary functions and suggests that different modes should be tried for the development and utilization of underground space in different types of Conservation districts in combination with the major stations of tack traffic to blaze new trails for the protection and renovation of the Conservation districts and for sustainable development.

关键词：

来源： cnki会议评论

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Science China(Technological Sciences) 2010年第4期53卷 886-891页

作者： ZU DongLin,HONG LiMing,CAO XueMing & TANG Xin Institute of Heavy Ion Physics,beijing city Key Laboratory of Medical Physics and Engineering,School of Physics,Peking University,beijing 100871,China Institute of Heavy Ion Physics Beijing City Key Laboratory of Medical Physics and Engineering School of Physics Peking University

In this paper the analytical expressions for the magnetic field H and induction B in iron-pole plates generated by MRI gradient coil are given using line-current and the multilayer dielectric plate model with the mirror-image *** current emanates from the magnetic flux in the iron-pole *** order to fully suppress the eddy current,this magnetic flux should be fully *** research results indicate the magnetic permeability of the resist-eddy plate must be bigger than that of magnetic pole material,*** iron,and that the resist-eddy plate should be thick enough to be far away from its magnetic saturation.

关键词： MRI suppress eddy current gradient coil resist-eddy plate mirror-image method

Retrieving crop leaf area index by assimilation of MODIS data into a crop growth model

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Science China Earth Sciences 2010年第5期53卷 721-730页

作者： WANG DongWei1,2,3, WANG JinDi1,2 & LIANG ShunLin4 1 State Key Laboratory of Remote Sensing Science, Jointly Sponsored by beijing Normal University and Institute of Remote Sensing Applications, CAS, beijing 100875, China 2 School of Geography, beijing Key Laboratory of Environmental Remote Sensing and Digital city, beijing Normal University, beijing 100875, China 3 Haihe River Water Conservancy Commission, Tianjin 300170, China 4 Department of Geography, University of Maryland, College Park, MD 20742, USA State Key Laboratory of Remote Sensing Science Jointly Sponsored by Beijing Normal University and Institute of Remote Sensing Applications CAS Beijing China School of Geography Beijing Key Laboratory of Environmental Remote Sensing and Digital City Beijing Normal University Beijing China Haihe River Water Conservancy Commission Tianjin China Department of Geography University of Maryland College Park USA

Leaf area index (LAI) is an important parameter in monitoring crop growth. One of the methods for retrieving LAI from remotely sensed observations is through inversion of canopy reflectance models. Many model inversion methods fail to account for variable LAI values at different crop growth stages. In this research, we use the crop growth model to describe the LAI changes with crop growth, and consider a priori LAI values at different crop growth stages as constraint information. The key approach of this research is to assimilate multiple canopy reflectance values observed at different growth stages and a priori LAI values into a coupled crop growth and radiative transfer model sequentially using a variational data assimilation algorithm. Adjoint method is used to minimize the cost function. Any other information source can be easily incorporated into the inversion cost function. The validation results show that the time series of MODIS canopy reflectance can greatly reduce the uncertainty of the inverted LAI values. Compared with MODIS LAI product at Changping and Shunyi Counties of beijing, this method has significantly improved the estimated LAI temporal profile.

关键词： inversion leaf area index crop growth model time series MODIS

Views on the Planning for Wangjing New District

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China city Planning Review 1989年第1期6卷 53-61页

作者： Jin Deshi beijing city Construction and Development Corporation

*** FeaturesThe Wangling new district lies inJiuxianqiao district in northeastern beijing,with the Capital Airport and Jingshun Roadto the east, the Beixiao River to the north,the planned Fourth Ring Road to the south... 详细信息

关键词： Views on the Planning for Wangjing New District

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双参数层析校正的聚焦深度分析

石油地球物理勘探 2004年第3期39卷 275-282页

作者：宋炜石油大学(北京)CNPC物探重点实验室

叠前偏移速度分析的难点是速度模型的迭代修正。本文以深度聚焦分析和双参数反射层析成像两种不同的速度估算方法为基础 ,通过时移 ,利用克希霍夫积分法深度偏移获取深度聚焦分析面板 ,利用 CRP层析成像方法来调整速度和深度模型 ,不仅... 详细信息

叠前偏移速度分析的难点是速度模型的迭代修正。本文以深度聚焦分析和双参数反射层析成像两种不同的速度估算方法为基础 ,通过时移 ,利用克希霍夫积分法深度偏移获取深度聚焦分析面板 ,利用 CRP层析成像方法来调整速度和深度模型 ,不仅克服了常规深度聚焦分析中模型修正公式的三个基本假设条件 (小倾角反射层、小偏移距和简单上覆层 )的限制 ,而且推出了一种新的地震速度估计和修正的方法。该方法通过聚焦深度分析和 CRP射线追踪来获得剩余时差 ,避免了叠前反射层析成像繁重的旅行时拾取工作。从数值模型的计算结果看 ,本文方法对常规速度分析难以处理的速度横向剧烈变化和复杂上覆层问题有较好的适应性和处理效果。

关键词：层析成像技术深度偏移技术速度分析速度模型地震勘探技术地震资料处理技术