双面加筋挡墙结构的应用及其有限元分析

针对辽宁省石佛寺水库枢纽一期坝顶加高工程申存在现场土石料短缺、土石料运距远和单价高等技术经济难题.将双面格栅加筋挡土墙结构用于大坝加高工程以降低对回填料性质的要求,并对双面加筋挡墙结构进行非线性有限元分析计算,综合比较实测结果与计算结果表明:双面格栅加筋挡土墙能有效控制顶部的变形,筋材应力与应变值处于较低水平,加筋结构安全和整体效果好,对土工格栅在筑坝工程中的应用有重要参考意义.     

试论水库除险加固中的设计误区

文章针对近几年水库加固的实际施工技术方案,结合施工和管理实际,对设计施工中的问题进行了分析总结,指出了水库除险加固中的安全误区,水库设计应服从于安全、但安全和效益两个角度同等重要!     

Automating the Construction of Internet Portals with Machine Learning

Domain-specific internet portals are growing in popularity because they gather content from the Web and organize it for easy access, retrieval and search. For example, www.campsearch.com allows complex queries by age, location, cost and specialty over summer camps. This functionality is not possible with general, Web-wide search engines. Unfortunately these portals are difficult and time-consuming to maintain. This paper advocates the use of machine learning techniques to greatly automate the creation and maintenance of domain-specific Internet portals. We describe new research in reinforcement learning, information extraction and text classification that enables efficient spidering, the identification of informative text segments, and the population of topic hierarchies. Using these techniques, we have built a demonstration system: a portal for computer science research papers. It already contains over 50,000 papers and is publicly available at www.cora.justresearch.com. These techniques are widely applicable to portal creation in other domains.     

ReinforcementBased Fuzzy Neural Network Control with Automatic Rule Generation

１　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ａｆｕｚｚｙｎｅｕｒａｌｎｅｔｗｏｒｋｃｏｎｔｒｏｌｌｅｒｂａｓｅｄｏｎｔｈｅｃｏｍｂｉｎａｔｉｏｎｏｆｆｕｚｚｙｌｏｇｉｃｓｙｓｔｅｍａｎｄｎｅｕｒａｌｎｅｔｗｏｒｋｈａｓｕｎｉｑｕｅｃｈａｒａｃｔｅｒｉｓｔｉｃｓ．Ｉｔｎｏｔｏｎｌｙｈａｓｔｈｅｆｕｎｃｔｉｏｎｏｆｌｅａｒｎｉｎｇａｎｄａｓｓｏｃｉａｔｉｖｅｍｅｍｏｒｙｂｕｔａｌｓｏｃｌｅａｒｌｙｒｅｐｒｅｓｅｎｔｓａｋｉｎｄｏｆｓｔｒｕｃｔｕｒｅｄｋｎｏｗｌｅｄｇｅａｎｄｄｏｅｓｆｕｚｚｙｉｎｆｅｒｅｎ…     

钢筋混凝土环形截面受弯构件正截面强度计算

在平截面假定的前提下,推导了钢筋混凝土环形截面受弯构件正截面非均匀配筋的计算公式,并且应用MathCAD数学工具软件对某一环形截面均匀及非均匀配筋方式分别进行了不同弯矩作用下的配筋计算.计算结果分析表明,<混凝土结构设计规范>(下简称<规范>)简单套用偏心受压构件的计算公式是不妥的;所推导的新计算公式,补充完善了<规范>中环形截面正截面受弯构件强度计算的内容.