泥沙与鄱阳湖水环境

分析并讨论了鄱阳湖泥沙的来源及其对鄱阳湖水环境质量的影响。     

PLC及其网络在掺混集中监控系统中的应用

介绍了一种掺混集中监控系统,该系统包括4个PLC分站、1个PLC主站和1个操作员站。采用CC-Link网络组成集中监控系统,实现了实时性、分散性控制与智能机器通信等功能。提高了系统的RAS(Reliability可靠性、Availability有效性、Serviceability可维护性),取得了安全生产、节能降耗、提高效率的良好效果。     

Aqueous Tape Casting Process with Styrene-acrylic Latex Binder

A commercial styrene-acrylic latex binder has been investigated as a good binder for aqueous Al₂O₃ suspensions tape-casting process. This paper focuses on the forming film mechanism of latex binder, the rheological behaviors of the suspensions, physical properties of green tapes and drying process of aqueous slurries with latex binder system. The drying process of the alumina suspensions is shown to follow a two-stage mechanism (the first stage: evoporation controlled process; and the second stage: diffusion controlled process). During the drying stage of the suspensions, the compressive force presses the latex particles and makes them be distorted, which results in cross-linking structure in contacted latex particles of the solidified tapes. A smooth-surface and high-strength green tape was fabricated by aqueous tape casting with latex binder system. The results from the SEM images of the crossing section microstructure of green tapes show that the latex is a very suitable binder for aqueous tape casting. CUI Xue-min: Born in 1971 Funded by “973” Program (No. G2000067204-01)     

Molten Salt Synthesis of Ba（ Mgl／3Nb2／3 ）O3 Powder

The single-phrase Ba(Mgl/3Nb2/3)O3(BMN) powder was saccessfully prepared by the KCImolten salt synthesis(MSS) method. The temperature for single-phase BMN powders by MSS was about 400℃ lower than that by the solid-phase method. The average particle size (APS) was about 0.91,u.m at 900℃ and increased with increasing synhesis temperature. Based on the APS, the activation energy for particle growth in theMSS, whose value was 64. 1kJmol^-1.was attained. The sinterability of the powder prepared by MSS method wasbetter than that pretared by solid-phase method.     

互联网时代乌镇融合共生发展的规划策略

世界互联网大会的永久落户为乌镇带来发展机遇的同时,也使其面临传统与现代的交织和碰撞。文章结合乌镇现阶段的发展问题及未来的发展趋势,在原有的传统水乡格局上注入了互联网基因,提出乌镇新时期的发展将传承水乡文化融合共生的精神内涵,促进人与自然、人与人、古今与中外、城镇与乡村、线上与线下等多方面的融合共生,建设互联网时代的"共生城市"。     

中国近代火车站之天津西站研究

铁路的建设与发展在中国近代史中占据着极其重要的地位,火车站房建筑也随之成为近代中国的重要公共建筑类型之一。本文的研究对象——天津西站,不仅因其独特的建设背景在当时呈现出别具一格的建筑风采,其中西融合、复杂多样的建筑设计语言更使其在百年之后仍以饱含文化韵味的建筑姿态吸引众多学者去探索、研究。文章从西站的建设背景——津浦铁路入手,通过整理分析史实资料,梳理其历史发展脉络,同时结合19世纪末20世纪初的欧洲建筑变革情况,对天津西站主楼的平立面、建筑细部设计、建筑风格、社会影响进行解析。     

声波平面斜测法在拱坝混凝土构件质量检测中的应用

该文主要介绍了声波平面斜测法在拱坝混凝土构件质量检测中的应用。通过实例介绍了该方法的测线布置,成果分析,开挖验证,表明方法的有效性。同时,也阐述了实例中的不足和缺憾,分析了该方法的应用条件。该文可供同行们参考。