Analysis of raft foundation design based on considering influence of superstructure stiffness

The finite element method was used for analysis of raft foundation design in high-rise building. Compared with other conventional methods, this method is more adapted to the practical condition since both superstructure stiffness and soil conditions were considered in calculation. The calculation results by example show that the base reaction is more uniform and the maximum reaction decreases obviously. Accordingly, the raft foundation design is more economic without any loss of security for high-rise building.     

ISO9660光盘文件系统在COSIX操作系统上的实现

分析了COSIX文件系统的主要结构和工作原理,阐述了CD-ROM文件系统的组成结构和实现原理。在COSIX文件系统的基础上设计和实现了光盘文件系统,为用户提供了一致的访问方式,访问符合IS09660标准的CD-ROM上的文件。     

移动目标自适应定位与通讯技术研究

本文介绍了自适应定位与通讯的设计原理以及技术路线,通过硬件设计和软件开发相结合的方式,实现了移动目标定位和通讯信号的实时检测和动态切换技术,可自适应选择信号强、费用低的定位和通讯方式,实现全覆盖、低费用的优化实时定位与通讯。自适应定位支持GPS系统定位、CDMA定位和北斗卫星定位系统,自适应通讯支持CDMA、北斗卫星和海事卫星。     

数码城市GIS之虚拟旅游

本文从数码城市GIS入手,介绍了当前比较流行的虚拟旅游。首先,介绍了虚拟旅游的定义和特点,然后介绍了虚拟旅游的类型和国内虚拟旅游网站的发展现状,在此基础上,最后提出了虚拟旅游的发展展望。     

绿色国民经济核算基本问题研究

绿色国民经济核算为自然资源存量价值与耗竭价值核算、环境污染损失价值核算及环境质量恢复与改善价值核算;绿色国民经济核算理论应依据马克思主义的经济理论、价值补偿理论、效用价值理论和可持续发展理论;自然资源存量和耗竭价值核算可采用支付意愿和供求定价模型法;环境污染造成的生产和固定资产损失价值核算可采用市场法;环境污染对人体健康造成的损失价值核算可采用人力资本法;绿色国民经济核算指标体系包括自然资源核算指标和环境保护核算指标;系统讨论绿色国民经济核算内涵、基本理论和方法以及指标体系以促进绿色国民经济核算的深入研究。     

珠江伶仃洋余流垂向分布的季节变化及其与径流的关系研究

对伶仃洋河门湾出口某观测点一整年海流观测数据进行了余流分析,探讨了珠江伶仃洋余流垂向分布的季节变化及其与径流的关系.珠江伶仃洋余流的垂向分布具有明显的上溯流和下泄流分层现象,上溯流和下泄流厚度全年呈周期性变化;实测径流量与上层下泄余流流速有很好的线性关系,底层的上溯流与径流量大小的线性相关性不明显,但实测径流量与底层的上溯流有良好的指数相关性;在洪、枯季转换季节上溯流较小,在洪季和枯季上溯流较大.各月余流的垂线平均纵向水量输送并不一致,在夏季是指向下游,而在其他季节则指向上游,变化与径流量大小有较大的关系.全年的欧拉余流是向上游输送水量的.     

Spatio-temporal Differentiation and Driving Factors of Industrial Ecology of Restricted Development Zone from Adaptive Perspective: A Case Study of Shandong,China

Based on the adaptive analysis paradigm, this paper constructs an evaluation index system and an evaluation model of the level of industrial ecology of a restricted development zone from the perspective of the industrial system and of the environmental system, and studies the spatial-temporal differentiation characteristics and the driving factors of the level of industrial ecology of the restricted development zone of the Shandong Province, China, by using a variety of measurement methods. The results show that: 1) In the temporal dimension, the level of industrial ecology of the research area increased from 2005 to 2017, while in the regional dimension, it was higher in the eastern coastal areas, followed by the northwestern area and the southwestern area; 2) In the spatial dimension, from2005 to 2017 the level of industrial ecology of the research area had a clear spatial dependence, and the regional spatial agglomeration of the restricted development zones with similar industrial ecology levels become increasingly evident; 3) On the whole, the industrial ecology level in the study area had a clear spatial differentiation pattern, as it was higher in the north and in the east and lower in the south and in the west. Moreover, its evolution model changed from a ‘three-core driven model' to a ‘spatial scattered mosaic distribution model', and then to a ‘single-core driven model'; 4) Industrial ecology was positively correlated with economic development, foreign investment, science and technology, and negatively correlated with the government role, while industrial structure and environmental regulation failed to pass the statistical significance test.     

湖北金银山锑矿蚀变矿物红外光谱特征及找矿应用

鄂南锑矿地区是我国重要锑矿产地之一,研究区内发现过大量锑多金属矿床(点)。目前随着浅部锑矿资源被开发殆尽,以往对中深部的找矿勘查仍未有新的进展,因此急需寻找一套快速有效的勘查方法,对该地找矿模型与预测方面进行深入研究,以扩大资源量和找矿成果。本文以金银山锑多金属矿床作为研究对象,利用短波红外光谱技术(SWIR)对于金银山锑矿ZK3101、ZK2701钻孔岩心进行光谱扫描,厘定获得了金银山锑矿蚀变矿物种类、组合、波谱参数等信息,并划分出蚀变矿物分带,分析矿化与蚀变矿物分带之间的关系。金银山锑金矿主要蚀变矿物有云母类、绿泥石类、碳酸盐类等,其中绢云母化带与成矿关系密切。通过计算绢云母族矿物Al—OH光谱特征参数,发现矿化部位绢云母结晶度(IC值)与Al—OH 2200nm 特征峰吸收峰位值(Pos 2200)出现低值异常(IC＜2, Pos 2200＜2205 nm),可作为有效的示矿指标。认为应用短波红外光谱技术可以快速圈定锑金矿体,有效指导矿产勘查,降低找矿成本,提高勘查效率,实现找矿突破。     

基于地面三维激光扫描数据的建筑物三维模型重建

用三维激光扫描技术获得的点云数据可构建建筑物的整体点云模型,同时可根据点云模型进一步生成三角网模型、实体模型。结合实际工程阐述构建模型的方法,同时对建筑物模型的作用作简要分析。     

正确计提资产减值准备

2001年1月1日，《企业会计制度》代替原《股份有限公司会计制度》开始在食业中施行，这是对我国会计核算制度的又一次重大改革，为提高我国企业的会计信息质量，加快会计与国际接轨的进程奠定了良好的基础。有关对资产减值准备规定的完善是这次改革中的一个重要举措，较详细地