核电工程数据中心建设研究     

万峻 《中国勘察设计》2013,(11):80-82

在电厂的建设过程中,从规划设计、采购、施工安装到调试运维等各阶段都会产生大量的数据信息,这些信息对电厂的运行管理将产生重要的影响。本文将从核电工程管理实际出发,通过阐述工程数据中心建设的必要性、所采用的理论、技术以及构建方法等4个方面内容,寻找到适用于AP1000三代核电工程特点的核电工程数据中心的建设方式。  相似文献   

Dual high‐strength steel eccentrically braced frames with removable links     

D. Dubina  A. Stratan  F. Dinu 《地震工程与结构动力学》2008,37(15):1703-1720

Structural damage in buildings designed according to the dissipative design philosophy can be significant, even under moderate earthquakes. Repair of damaged members is an expensive operation and may affect building use, which in turn increases the overall economic loss. If damage can be isolated to certain dissipative members realized to be removable following an earthquake, the repair costs and time of interruption of building use can be reduced. Dual structural configurations, composed of a rigid subsystem with removable ductile elements and a flexible subsystem, are shown to be appropriate for the application of removable dissipative element concept. Eccentrically braced frames with removable links connected to the beams using flush end‐plate bolted connections are investigated as a practical way of implementing this design concept. High‐strength steel is used for members outside links in order to enhance global seismic performance of the structure by constraining plastic deformations to removable links and reducing permanent drifts of the structure. Copyright © 2008 John Wiley & Sons, Ltd.  相似文献   

数据中心集成开发技术: 新一代GIS架构技术与开发模式   总被引：22，自引：16，他引：6  

吴信才 《地球科学》2009,34(3):540-546

解决分布式异构多源空间数据共享、不同厂家的功能共享和合作开发是当前GIS开发和应用领域的难题.提出了数据中心集成开发模型框架, 并基于该框架提出了新一代GIS架构技术和开发模式, 介绍了数据中心的核心技术——数据仓库技术、功能仓库技术、搭建与配置技术等, 同时给出了国土数据中心的应用实例, 为基于数据中心大型信息化系统解决方案的实现提供了一种新的模型.   相似文献   

DCT ANALYSIS DISTRIBUTION FEATURES OF NEAR-SURFACE WIND FIELDS DURING THE LANDFALL OF VONGFONG     

李江南  王安宇  杨兆礼  李国丽  吴池胜  侯尔滨 《热带气象学报(英文版)》2003,9(2):143-151

1 INTRODUCTION The typhoon is a destructive weather phenomenon that stands at the top of ten major natural disasters[1]. Typhoon-related damages are the immediate consequences of weather it brings forth, which include heavy rain, strong winds and storm surges (water gain). They cause flash floods, bring down houses and break through dams[1]. Of the research on typhoons for the recent 10 years[2], new advances have been reported on abrupt changes in the motion, structure and intensity of…  相似文献   

波浪作用下潜标拖缆动力学分析     

朱刚  杜月中 《海洋工程》2007,25(4):15-20

对三维潜标拖缆在规则波作用下的动力响应进行了研究,首先基于集中质量法给出了缆绳在规则波作用下的控制方程,然后提出了两种不同类型的自由端边界条件:质点型和艇型自由端边界条件,前者把拖体视为作三个自由度线运动的质点,而后者把拖体视为作六自由度运动的艇体,最后用有限差分法进行了数值研究。数值计算结果表明潜标拖缆在规则波的作用下,不仅作近似的简谐振动,还会在横向、垂向产生一个偏移量,该偏移量的大小随浪向角的变化而变化,另外受遭遇频率的影响,振动的幅值也随浪向角的变化而呈现不同的特征。  相似文献   

东海陆架前缘斜坡北部的滑塌带   总被引：1，自引：0，他引：1  

李成钢  范奉鑫  阎军 《海洋科学》2007,31(5):90-92

从1994年对东海陆架前缘斜坡北部实测的8条浅地层记录中,我们发现这些测线上都有滑塌构造,并形成了一条平行于陆架转折线的滑塌带,滑塌带呈NNE向展布,平均宽约7.5km,它们是沉积物流从陆坡上部向下移动的证据。  相似文献   

Accumulation phenomena in fluvial processes and the corresponding stochastic model     

Jing  Huan  Zhong  Deyu  Zhang  Hongwu  Shi  Xufang  Wang  Yanjun 《地理学报(英文版)》2020,30(6):1021-1040

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西北干旱区间歇性河流与含水层水量交换研究进展与展望     

王平 《地理科学进展》2018,37(2):183-197

本文依托国家自然科学基金青年项目“河水温度对干旱区宽浅型河床渗透系数影响的定量研究”,并梳理了其他相关研究,总结了中国西北干旱区间歇性河流与含水层水量交换研究所面临的基础科学问题及当前所取得的研究进展。主要结论为：以宽浅型沙质河床为基本特征的西北干旱区内陆河流域下游河流,其河床每年经历数次干湿交替与冻融过程。受河水温度与河流水动力条件的影响,河床作为河流与含水层相互作用的重要界面,其渗透性能具有高度时空变异性,已成为河水与地下水水量交换研究的难点与热点。分析指出,在环境变化和当前交叉学科迅猛发展的背景下,以河流与含水层相互作用为核心的潜流带水文学发展面临新的机遇与挑战。  相似文献   

Data Configurations and the Cokriging System: Simplification by Screen Effects   总被引：1，自引：0，他引：1  

A. Subramanyam  H. S. Pandalai 《Mathematical Geosciences》2008,40(4):425-443

Large cokriging systems arise in many situations and are difficult to handle in practice. Simplifications such as simple kriging, strictly collocated and multicollocated cokriging are often used and models under which such simplifications are, in fact, equivalent to cokriging have recently received attention. In this paper, a two-dimensional second-order stationary random process with known mean is considered and the redundancy of certain components of the data at certain locations vis-à-vis the solution to the simple cokriging system is examined. Conditions for the simple cokriging weights of these components at these locations are set to zero. The conditions generalise the notion of the autokrigeability coefficient and can, in principle, be applied to any data configuration. In specific sampling situations such as the isotopic and certain heterotropic configurations, models under which simple kriging, strictly collocated, multicollocated and dislocated cokriging are equivalent to simple cokriging are readily identified and results already available in the literature are obtained. These are readily identified and the results are already available in the literature. The advantage of the approach presented here is that it can be applied to any data configuration for analysis of permissible simplifications in simple cokriging.  相似文献   

南通海岸带滩涂开发类型选择与空间功能配置研究   总被引：3，自引：0，他引：3  

陈诚 《地理科学》2017,37(1):138-147

海岸带滩涂开发类型选择与空间布局是海岸带综合管理研究的重要内容,对于促进海岸带可持续发展具有重要意义。以海岸带资源环境-社会经济条件与滩涂开发类型对应关系透视为基础,结合南通海岸带滩涂条件、开发类型演变和区域发展背景分析,提出该地区生态旅游、农业和港口–工业–城镇多元化的滩涂综合利用模式,集成适宜性评价与分区、多部门规划冲突与协调等方法,探讨了南通海岸带滩涂地区生态与旅游、农业和港工城等功能区的空间配置路径。南通海岸带地区三类空间适宜比例分别23.5%,32.7%和43.8%,可以作为海岸带综合管理政策制定的参考。  相似文献