A systolic image difference algorithm for RLE-compressed images

A new systolic algorithm which computes image differences in run-length encoded (RLE) format is described. The binary image difference operation is commonly used in many image processing applications including automated inspection systems, character recognition, fingerprint analysis, and motion detection. The efficiency of these operations can be improved significantly with the availability of a fast systolic system that computes the image difference as described in this paper. It is shown that for images with a high similarity measure, the time complexity of the systolic algorithm is small and, in some cases, constant with respect to the image size. A formal proof of correctness for the algorithm is also given     

虚拟仪器--梯度仪控制系统

研究了虚拟仪器技术在梯度仪控制系统测试中的应用。通过软、硬件技术的结合 ,完成虚拟仪器———梯度仪的设计。     

PLC-5后备通讯技术在锅炉控制系统中的应用

以75t/h锅炉控制系统为例.详细地阐述了与PLC-5的硬件安装、后备系统工作流程、软件设计及后备程序调试等有关的后备技术问题.从而有效地避免了PLC硬件系统故障造成的控制过程中断,实现了利用后备(冗余)通讯技术,进行连续,不间断的过程控制。     

浅议沙河渡槽槽身侧墙钢模台车施工方法

沙河渡槽的槽身混凝土通过采用钢模台车浇筑方案,加快了施工进度,减少了施工缝,改善了混凝土外观,提高了混凝土实体工程质量。本文介绍了沙河渡槽槽身侧墙钢模台车施工实践经验,可供其他类似工程参考借鉴。     

我国海水利用发展现状与国外经验借鉴

为解决淡水资源短缺,应对水资源危机,世界许多沿海国家及地区积极开展海水淡化和综合利用,为解决区域水资源短缺问题找到了一条有效途径.近年来,我国沿海地区水资源短缺形势日益严峻,如何利用海水资源有效缓解水危机是我国长期以来十分关注的问题.从我国的基本国情水情出发,分析我国海水资源化利用的发展现状,分析海水利用发展过程中存在的问题及原因,在借鉴国外海水利用经验的基础上,提出促进我国海水利用发展的对策建议,为相关部门加强海水淡化和综合利用管理提供参考.     

绿色施工方案评价的OWGA和CWGA集成方法

绿色施工评价走向标准化,但对绿色施工等级评价却没有统一方法.在总结已有评价方法的基础上,通过建立绿色施工方案评价的典型指标,评价绿色施工方案的节能环保性.运用有序加权几何平均算子（OWGA算子）和组合加权几何平均算子（CWGA算子）的集成评价方法,结合绿色施工影响因素和社会、生态效益发挥影响因素,通过对各指标的专家打分值进行纵向和横向集结,消除专家受个人感情等主观因素的影响,增加中间值的作用,使得方案的评价结果更加科学合理.最后,通过工程实例验证该方法的实用性、有效性和可行性.     

MULTISTAGE ANALYSIS OF HYDROLOGIC ALTERATIONS IN THE YELLOW RIVER,CHINA

Natural river flow regimes provide an array of ecological and social functions by sustaining the health of riverine ecosystems. To identify the hydrologic alterations in the lower Yellow River basin caused by natural factors and human activities, we developed multistage hydrologic analysis to investigate the temporal variability of the river's flow regimes. We used a cumulative departure curve and Mann–Whitney–Pettitt nonparametric tests to determine possible change points based on hydrologic data from 1950 to 2006. We then used the range of variability approach to characterize and to quantify the temporal variability of the hydrologic regimes that were associated with perturbations such as dam operation, flow diversions or intensive conversion of land use within the watershed. In the case study, three stages in hydrologic alterations of the flow regime were found: a stage without human impacts, a stage with excessive human impacts and a reservoir‐regulation stage. Our results indicated that (i) after 1997, dam operation efficiently achieved flood control using sediment regulation activities; (ii) although effective in flood control, the Xiaolangdi Reservoir could not handle situations with extremely low flow, such as during droughts; and (iii) under the arid climate of the Yellow River basin, water consumption by agriculture was the main cause of water shortages. The current study shows that multistage hydrologic analysis can greatly assist regional water resources management and the restoration of riparian eco‐environmental systems affected by dam construction under a changing environment. Copyright © 2012 John Wiley & Sons, Ltd.     

H9000系统在高坝洲水电站监控改造中的应用

简要介绍了高坝洲水电厂计算机监控系统改造的设计思想、基本结构、设备配置以及成功应用,对计算机监控系统改造的实现有着重要的意义,为中型以上水电厂的自动化提供了有益的经验。     

柔性防护结构在长港河道整治工程中的应用

通过鄂州长港河道整治工程的实际工程应用,提出了可普遍应用于河道流域治理的柔性防护结构解决方案,通过与传统刚性防护结构进行比选,归纳总结柔性防护结构在安全、经济、施工、生态方面的突出特点,为类似工程提供了一种可借鉴的解决办法。     

基于WebGIS的防汛决策支持系统研究

空间地理信息和防汛信息密不可分,将地理信息系统技术运用在防汛信息中,对信息的采集、处理、管理、分析和表达上起到关键作用。本文通过分析防汛信息的特点,运用面向服务体系架构的WebGIS技术,基于地理信息系统技术进行防汛决策系统设计。防汛决策系统具备防汛实时数据和空间信息特点,符合水电信息化、现代化、科学化发展基础要求,能够为防汛决策提供有力的技术支持和保障。