云南白马寨铜镍硫化物矿床形成过程的定量模拟

岩浆的分离结晶作用和地壳同化混染作用是造成硫饱和的重要因素。本文以金平-Song Da地区二叠纪低钛苦橄岩为原生岩浆,使用MELTS程序模拟了岩浆在分离结晶和围岩同化混染作用的控制下达到硫饱和,发生硫化物熔体的熔离。模拟结果表明,低钛苦橄质岩浆从源区上升到浅部岩浆房的过程中发生了约10%的橄榄石的分离结晶,形成高镁的玄武质岩浆。高镁玄武质岩浆在浅部岩浆房内同化混染>18%的围岩,并经历约27%硅酸盐矿物的分离结晶后达到硫饱和。熔离的硫化物熔体在岩浆通道内聚集形成了白马寨铜镍硫化物矿。经历硫化物熔体熔离后的残余岩浆喷出地表形成了金平地区亏损Ni和Cu并具有强烈地壳混染特征的低钛玄武岩。     

时统设备的PCI设备驱动程序设计

介绍了在Windows系统下用Visualc＋＋、DDK和DriverStudio软件对PCI（peripheral component interconnect）设备驱动程序的编写。阐述了PCI设备驱动程序的分层结构和编写方式。PCI驱动属于内核模式驱动程序中的即插即用驱动,PCI的即插即用功能是本丈重点介绍对象。另外介绍了PCI设备驱动通过配置空间获取设备资源的过程与方法,以及驱动程序与操作系统之间的通讯机制。     

3维GIS技术在建设方案规划审查中的应用研究——以重庆某项目4号地块为例

将3维GIS引入到建设方案的分析与审查过程中,通过建立真实的3维场景,将建设方案纳入到3维场景中,借助GIS的空间分析工具,从不同的角度和视点对建设方案进行了分析,模拟了不同建设方案建成后对周围景观的影响,从而有力地支撑了方案的审查。     

卫星导航运营管理系统的研究与实现

在卫星导航系统稳定运行的基础上,提出了运营管理系统的设计理念,介绍了该系统的功能组成、工作原理,以及各功能模块之间的工作流程关系,以实现卫星导航系统值班与维护工作的规范化、智能化,提高值班人员的综合业务素质和快速解决系统突发问题的能力,确保卫星导航系统的正常稳定运行,该运营管理系统对所有卫星导航系统的运营管理具有重要的应用价值和借鉴意义。     

序列状态的林业资源时空数据模型研究

对林业地理实体时空演变过程进行分析,认为林业地理实体的演变总体上是渐变和突变交替的时空过程,而且各专题属性和空间分布的演变类型和演变频率不尽相同。在此基础上,提出由序列快照和事件方法组合而成的序列状态时空表达方法,以状态集表达时空对象在生命周期内的演化历程,并针对林业数据的特点,采用面向对象的数据组织方式设计了林业资源时空数据模型。模型可对不同演变类型进行组合,并实现了对渐变和突变的统一表达,另外,模型也允许采用不确定数据以加强对渐变过程的表达。通过原型系统验证了模型的可行性。     

RURAL REGIONAL GOVERNANCE IN THE UNITED STATES: THE CASE OF THE RESOURCE CONSERVATION AND DEVELOPMENT PROGRAM*

Rural governance has drawn considerable attention from both local government officials and scholars in the United States since the early 1990s. It is touted as a way to mitigate the limitations of the traditional government unit‐based approaches to problem solving and decision making and to foster partnerships across both jurisdictional boundaries and sectors (public, private, and nonprofit). Established in 1962, the Resource Conservation and Development (rc&d ) program of the U.S. Department of Agriculture provides a unique model of rural regional governance. Acting as a coalition of governments, private businesses, individuals, and interest groups, the rc&d program provides the flexibility needed to deal with issues at the appropriate spatial scale. It incorporates aspects of both grassroots and governmental organizations and can bring together local interests and expertise with governmental policy and support in service provision, problem solving, and economic development. The approach does not necessarily entail loss of power on the part of the state, but it does provide a mechanism for local people to exercise their agency, to tackle their problems, and to decide which elements of their lives they want to sustain.     

THE CONTENT OF RATZEL'S POLITISCHE GEOGRAPHIE

The concentration of poor, service-dependent groups in aging central cities results both from suburbanization of the affluent and from the reliance of the service-dependent population upon place-specific human services provided by the public sector. Such concentration of services and their users in deteriorating inner-city sites may be functional for the larger society, but it has adverse impacts upon those who are service dependent. This paper argues that the implications of locational interdependence between such groups and their support services demand a paradigm for urban geography that centers upon the fundamental structure and impacts of population/service-provision linkages.     

REPORT OF THE AAG DELEGATE TO THE CANADIAN ASSOCIATION OF GEOGRAPHERS

Formal program evaluation is one of the most widely used tools for program termination decisions in universities. By understanding and anticipating program evaluation, a farsighted geography department can convert it from a threat into a strategy for survival in the 1980s. In the process, many departments will be renewed and improved.     

Flexible substructure online hybrid test system using conventional testing devices

This paper presents a substructure online hybrid test system that is extensible for geographically distributed tests.This system consists of a set of devices conventionally used for cyclic tests to load the tested substructures onto the target displacement or the target force.Due to their robustness and portability,individual sets of conventional loading devices can be transported and reconfigured to realize physical loading in geographically remote laboratories.Another appealing feature is the flexible displacement-force mixed control that is particularly suitable for specimens having large disparities in stiffness during various performance stages.To conduct a substructure online hybrid test,an extensible framework is developed,which is equipped with a generalized interface to encapsulate each substructure.Multiple tested substructures and analyzed substructures using various structural program codes can be accommodated within the single framework,simply interfaced with the boundary displacements and forces.A coordinator program is developed to keep the boundaries among all substructures compatible and equilibrated.An Internet-based data exchange scheme is also devised to transfer data among computers equipped with different software environments.A series of online hybrid tests are introduced,and the portability,flexibility,and extensibility of the online hybrid test system are demonstrated.     

小庄矿井办公楼桩基工程质量监理控制计划

监理公司在建设项目实施过程中受建设单位委托,对建设工程施工过程中的质量、安全、进度和造价进行全面控制与管理。本文通过陕西彬长矿区小庄矿井及选煤厂办公楼桩基工程施工实例,论述桩基工程施工过程中质量监理控制计划问题。