平行换乘车站基坑外土压力特征及墙体变形

介绍轨道交通平行换乘车站后建车站施工中的基坑外土压力特征及墙体变形性状。在采取"化整为零"的施工技术措施后,根据车站施工得到的实测监测数据,尽管具有非对称特点,靠先建车站侧变形明显偏小;在基坑开挖和回筑阶段,墙后土压力的非对称性更为明显;但在顶板完工后,土压力趋于稳定,非对称性逐渐消失。     

水泵变频调速在供水系统中的应用

为达到更好的节能效果,依据武进水厂的运行经验,建议多台水泵并联运行时采用变频调速来控制.     

探索适应珠江三角洲地区小区休憩环境的新模式——“绿色方舟”概念设计研究

探讨了在富有典型意义的高密度城市商品居住小区中,创造高质量公共休憩环境,营造更具亲和力的社区交往空间的具体途径。提出一个针对珠三角小区休憩环境的探索性概念设计——“绿色方舟”,这个设计是包括住宅群体布局、住宅建筑设计、休憩环境设计等的一个较为系统和全面的方案,并分析了可行性等问题。     

横向设肋对狭长平面上正交正放网架性能的影响

对边长比为１：２的矩形正交正放网架提出将其中部分桁架沿横向（短向）加高，形成横肋以划分结构的方案。并对不同横肋设置和刚度的影响进行了分析。     

北京五合:从海归派到国际化

从上个世纪初建筑的“西学东渐”到今天，中国的“海归派”们已历经数代，他们不仅成为中国与世界发达国家沟通，联系的重要桥梁，并进一步成为引进世界建筑领域先进设计理念和建筑技术的快速通道。今天，越来越多的国内建筑设计师在国外求学有成甚至工作一段时间后，回到中国这个巨大的建筑设计市场。     

装配整体式钢筋混凝土框架梁柱节点的试验研究

介绍一个装配整体式钢筋混凝土框架中柱节点与另一个现浇钢筋混凝土框架中柱节点的对比试验。试验结果表明,梁柱间采用齿槽接头,梁的主筋采用滚轧直螺纹接头的装配整体式梁柱节点的受力性能是可靠的;试验还表明,节点处楼板内的钢筋对梁负弯矩承载力的贡献是很大的,不容忽视,否则就不能满足"强柱弱梁"的要求。     

Calibration of a Parallel Kinematic Machine Tool

The parallel kinematic machinetool(PKMT)is anew-style machine tool[1].Though it has an advan-tage over traditional NC machine tool due to a seriesof characteristics such as si mple structure,fast re-sponse speed and non cumulative errors[2,3],its abso-lute accuracy is not sufficient for a machine tool re-quiring high accuracy.A mainfactor reducingthe ac-curacy is kinematic parameter errors caused by ma-chining and assembling errors[4].Calibration is a solution to this problem.It ismore prac…     

Active learning boosted computational discovery of covalent–organic frameworks for ultrahigh CH4 storage

As an environmental-benign fuel, methane (CH₄) has received considerable interest for developing high-capacity energy storage systems. Herein, we aim to rapidly discover covalent–organic frameworks (COFs) for ultrahigh CH₄ storage among 530,000+ COFs, including one experimental (Curated) and two hypothetical (Berkeley and Genomic) databases. First, the feature space of all the three COF databases is projected by t-Distributed Stochastic Neighbor Embedding (t-SNE) technique, which reveals a potential but unexplored regime in Genomic COFs. Subsequently, an active learning (AL) approach is developed by integrating parallel acquisition with molecular simulation to efficiently explore Genomic COFs. The parallel AL model demonstrates remarkable screening efficiency and shortlists top COFs by evaluating only 50 out of 445,845 Genomic COFs. A record-breaking Genomic COF is identified with CH₄ deliverable capacity of 222.2 v/v, surpassing the current world record (208.0 v/v from experiment and 217.9 v/v from simulation). Our AL approach is significantly faster than brute-force simulation and conventional machine learning, it would accelerate the discovery of advanced porous materials for broad applications.     

A concurrent control architecture for autonomous mobile robots using Asynchronous Production Systems

The quest for efficient real-time response by autonomous robots in hazardous environments necessitates not only fast computational schemes in expert systems but also requires insights on high performance data structures and concurrent algorithms that lead to elegant problem-solving methods in the AI discipline. towards this objective, this paper presents an Asynchronous Production System (APS) of architecture capable of monitoring and processing real-time information.     

江苏江北地区城镇空间格局与南通发展

基于近年来对长江三角洲地区的研究,结合江苏江北地区空间发展的新形势,进一步探讨区域空间结构及其变化趋势,提出要因地制宜地探索江北地区城乡统筹发展的新模式, 并就南通空间发展提出若干建议。