简介:【 摘要 】 目前,城镇公共排水管网建设主体多元化,竣工后的排水管网,无法正常移交到专业单位进行规范化管理。为了解决城镇排水问题,实现水环境质量根本性好转,改善城市生态环境,促进城市生态文明建设,通过先进的技术方法和仪器设备,查清城镇排水管道的健康状况并进行评估,为排水管道养护维修提供重要的基础数据和参考依据。 【 Abstract 】 At present, the main body of urban public drainage network construction is diversified. After completion, the drainage network can not be transferred to professional units for standardized management. In order to solve the problem of urban drainage, realize the fundamental improvement of water environment quality, improve the urban ecological environment and promote the construction of urban ecological civilization, through advanced technology, methods and equipment, the health status of urban drainage pipelines is checked and evaluated, which provides important basic data and reference basis for maintenance of drainage pipelines.
简介:【 摘要】 卫星遥感影像的安全性和国家安全息息相关,但是伴随着卫星遥感影像的商业化程度日益增加,卫星遥感影像也面临着影响国家安全的重大问题。论文 介绍了国外针对国外卫星遥感影像安全出台的控制措施,并且对卫星遥感影像控制策略进行了讨论,旨在为提高卫星遥感影像的使用安全提供一些参考。