Road construction and landscape fragmentation in China

The landscape fragmentation caused by road construction has many direct and indirect impacts on wildlife and ecosystems. By using the GIS and statistic software of fragmentation computation, a comprehensive index, road-induced landscape fragmentation index (RLFI), is proposed to quantify the degree of landscape fragmentation resulting from different levels of road constructions. The results show that road-induced fragmentation index in China ranges from 0.987 to 3.357, with a mean of 1.846 in 2002. The regional differences of landscape fragmentation are obvious and scoring sequence is: North China (2.65) > East China (2.62) > Central China (2.60) > South China (2.51) > Southwest China (2.34) > Northeast China (2.19) > Inner Mongolia (1.88) > Northwest China (1.67) > Qinghai-Tibet Plateau (1.65). The anisotropic analysis indicates that the variation of fragmentation index in east-west direction is larger than that in south-north direction.     

开封市开放空间系统的设计与营建

开封市是我国"七大古都"之一,是"中原城市群"的重要成员,在河南省城市体系中发挥着"豫东区域性中心城市"的重要作用。将开放空间系统作为城市生态调控的"容器",通过开放空间系统的设计和营建来加强生态城市建设,是推动该市进入可持续发展状态的重要途径。文章在分析开封城市特色的基础上,论述了该市开放空间系统设计与营建的必要性及其应遵循的原则,提出开放空间系统圈层一体化的设计方案,以及绿色开放空间和灰色开放空间营建的要点。     

中国的公路建设与景观破碎程度

The phenomenon of habitat fragmentation which was resulted from anthropogenic disturbances for natural landscape or ecosystems such as removing original land cover, creating edge habitat, altering landscape structure and function, and increasing access fo…     

SMW工法在南京地铁钓鱼台暗埋段基坑支护工程中的应用

SMW工法支护体系具有工艺简单、操作方便等特点。通过南京地铁钓鱼台暗埋段工作井的基坑SMW工法支护结构的施工实践，对其变形情况和适用性作了分析。     

广州华南快速路桥基钻(冲)孔灌注桩施工技术

广州华南快速路工程有若干座桥梁，采用钻(冲)孔灌注桩基础，共112根，桩径10、15及18 m三种，桩长44~51 m，由于地质条件变化大，部分地层中有断层夹泥与溶洞等不良地质，主桥桩基位于深约8 m的水中，具有一定的施工难度。对其施工方法与技术措施作了介绍。     

THE GREATER MIDDLE EAST AND REFORM IN THE BUSH ADMINISTRATION'S IDEOLOGICAL IMAGINATION

ABSTRACT. In pursuit of its foreign‐policy goals, the administration of President George W. Bush has attempted a dramatic reshaping of the vision of the Middle East in the American mind. References to the “new” or “greater” Middle East now include countries far outside traditional concepts of the region, including those in West Africa, Southeast Asia, and Central Asia. The administration argues that this region is defined not by cultural (Arab) or religious (Islam) characteristics but by a lack of democracy; hence a grand strategy is needed to execute reform. This article examines current U.S. efforts to achieve reform in the region, the components of the ideological construction of the New Middle East, the perceived role of Iraq, Turkey's potential role as a “model” for the region, and responses from the region to current U.S.‐led reform efforts.     

雅玛里克断裂南支断层形变监测与分析

利用跨断层短水准测量,建立了跨雅玛里克断裂南支断层形变监测网,通过资料分析得出该断裂带断层活动特征, 确定了雅玛里克断裂为全新世早期活动断裂.     

A review of soil and water conservation in China

The preservation and sustainable development of soil and water resources is one of the basic principles for the development of China. Throughout the course of history, all the social improvement and economic development are deeply concerned with soil loss and ecological environmental protection. It is now a common sense that soil and water conservation is the safety insurance for national ecology and its development. For the past long period of time, soil and water loss has been recognized as "the No.1 killer" to the ecological environment. The nation is on the stage of the critical conditions for its development. China has massive mountain and upland area with complicated geological conditions and accelerated human destruction and serious soil and water loss. Based on rich historical documents, renovating experience and detailed analysis of the data collected in field experiments and field surveys for soil and water conservation, this paper aims to review the general characteristics of soil and water loss, to explore the relationship between soil and water conservation and sustainable economic development, and to provide relevant strategies for soil and water conservation in China.     

大型有限元软件ANSYS在堆山工程中的应用

建筑垃圾堆山造景是生态城市建设中的一个新课题,是有效处理及利用建筑垃圾的新方法,然而地基基础沉降和山体稳定性是建筑垃圾堆山造景中山体设计的关键.现利用大型有限元通用软件ANSYS对山体在自重载荷作用下的沉降和稳定性进行实体模型仿真计算,并与工程常用简化计算进行比较,两者结果基本一致.并在有限元计算中,利用ANSYS有限元软件中的参数化设计语言(APDL)编制了山体塑性判别程序,进而对山体堆填过程的沉降和稳定性有一个整体的了解,这对山体的施工有巨大的指导意义.这将为类似工程山体设计和施工控制提供有效依据.     

公路建设中的环境地质灾害及防治对策

文章论述了公路建设中的环境地质灾害问题，并提出了相应的工程对策，对在建和拟建道路工程及环保工作具有指导和参考意义。