基于WebGIS的江西省山洪灾害预报系统设计与应用

针对南方丘陵多雨地区山洪灾害防御需求,采用B/S三层体系结构设计了基于WebGIS技术和水文预报模型的江西省山洪灾害预报系统。系统提供山洪灾害实时预报、临近预报和短期预报山洪灾害风险产品,发布山洪灾害风险等级、基础地理信息等数据,实现了地图浏览、GIS基本操作、图层管理、数据查询等功能。预报时效检验表明系统预报结果较山洪灾害实际发生时间提前3 h以上,并在2009年7月2—3日赣州地区一次山洪过程进行模拟,能够准确预报出山洪风险等级,应用效果良好。     

Resonance and criticality measure of ground motions via probabilistic critical excitation method

Resonant characteristics of recorded ground motions are investigated and a new measure of criticality of ground motions is proposed. Four classes of recorded ground motions, i.e., (i) near fault motions (rock records), (ii) near fault motions (soil records), (iii) long duration motions (rock records) and (iv) long duration motions (soil records), are taken from Abrahamson N, Ashford S, Elgamal A, Kramer S, Seible F, Somerville P, Proc of First PEER Workshop on Characterization of Special Source Effects, 1998. It is shown that resonant characteristics of recorded ground motions can be captured appropriately by means of the probabilistic critical excitation method due to the present author regardless of the type of ground motions and the distance between the critical response and the actual one can be a new measure of criticality of ground motions. The time-averaged approximate treatment of nonstationary ground motions as stationary ones is shown to be adequate for structures with shorter natural periods subjected to long duration ground motions.     

关于《微功耗遥测地震发讯设备》的研制

本文介绍了用高性能集成电路研制的高稳定性的微功耗遥测地震发讯设备,提供了该设备的设计要求,主要单元电路的设计方法,整机的主要技术指标及其主要参数的设计计算。     

基于面向对象原理的数字地图符号设计方法研究

基于面向对象编程原理，对数字地图的符号按面向对象的分类方法进行分类，详细说明了各类数字地图符号在计算机上的绘制方法，并在对线状符号的处理上改进了以往的传统做法，提出了新的思路，使程序实现更为方便，提高了程序执行效率。     

成都标准基线场的设计及光干涉测量

本文较详尽地阐述了成都标准基线场的设计特点及其理论依据，并介绍了光干涉测量及其配合的EDM测量、光干涉测量计算结果和精度分析。     

一个建筑师眼中的计算机辅助设计

本文从一个建筑师的角度对计算机辅助设计在建筑设计领域的运用进行分析,指出了计算机辅助设计给建筑设计带来的便捷,也说明了容易引起的问题,并提出了自己的思考。     

浙江省地质环境信息管理系统建设方案

地质环境监测过程中涉及到海量的数据信息,使用传统的数据管理手段无法满足当前工作的各项需求,因此,合理规划面向各部门,具有统一数据源,基于GIS技术、B／S、C／S技术模式的管理信息系统,实现数据集中管理,分布使用的目标,将有效地提高数据信息资源的利用率、减少数据资源的维护成本与程序。对于单位的内部各部门的分工协作完成各项工作具有十分重要的促进作用。     

Identification of critical ground motions for seismic performance assessment of structures

A method is established to identify critical earthquake ground motions that are to be used in physical testing or subsequent advanced computational studies to enable seismic performance to be assessed. The ground motion identification procedure consists of: choosing a suitable suite of ground motions and an appropriate intensity measure; selecting a computational tool and modelling the structure accordingly; performing Incremental Dynamic Analysis on a non‐linear model of the structure; interpreting these results into 50th (median) and 90th percentile performance bounds; and identifying the critical ground motions that are close to these defining probabilistic curves at ground motion intensities corresponding to the design basis earthquake and the maximum considered earthquake. An illustrative example of the procedure is given for a reinforced concrete highway bridge pier designed to New Zealand specifications. Pseudodynamic tests and finite element based time history analyses are performed on the pier using three earthquake ground motions identified as: (i) a Design Basis Earthquake (10% probability in 50 years) with 90 percent confidence of non‐exceedance; (ii) a Maximum Considered Event (2% probability in 50 years) representing a median response; and (iii) a Maximum Considered Event representing 90 percent confidence of non‐exceedance. Copyright © 2006 John Wiley & Sons, Ltd.     

单相双电源自动切换装置的研制

叙述了单相双电源自动切换装置的设计要求及思路,实际使用证明该装置完全达到了设计要求,指出,该装置的使用可实现供电系统自动化,可用于“十五”项目的建设。     

提升铁路勘察设计企业绩效管理能力的思考

多数铁路勘察设计企业绩效管理存在着观念落后、配套措施不到位、未充分发挥促进员工发展的作用等问题。为进一步提升铁路勘察设计企业绩效管理能力，本文提出了树立以企业战略为导向的绩效管理观念、坚持“以人为本”的绩效管理理念、建立科学的绩效管理体系、差异化设定考核指标、兼顾财务指标和非财务指标等对策建议。