混凝土多孔砖应用技术研究

在分析了多孔砖力学特点的基础上,通过分析和研究,找出克服由于设计、施工原因造成的混凝土多孔砖砌体强度下降的措施。     

基于GPS的高层建筑环境激励动态特性研究及应用

本文结合重庆大学主教学楼工程实例,对GPS技术在环境激励下的动态特性进行监控的情况进行了分析和论述。研究结果表明,在高层建筑施工中,应用GPS技术进行建筑物环境激励动态特性监控是一种行之有效的方法。     

深基坑土钉支护的有限元分析

本文阐述了土钉支护的发展简史，针对济南济享大厦土钉支护开挖深基坑进行有限元分析并取得较准确的结果，说明在深基坑土钉支护设计中应注意的问题．     

Ultrasonic thin-walled tube wave structure for sensing devices

Theoretical and experimental investigations of thin-walled tube acoustic wave devices for gravimetric sensing applications are presented. Integrated sensor configurations have been demonstrated by employing a sol-gel processed thin piezoelectric lead zirconate titanate (PZT) film. This was coated coaxially on stainless steel tubes and interdigital transducers (IDT) fabricated as the transmitter and receiver on the curved tube surfaces. We have observed tube waves along both the axial and circumferential directions between 1 and 6.6 MHz. We have also analyzed the mass sensitivities of different modes propagating along the tubes and shown that high mass sensitivity can be achieved by keeping the tube wall thin     

BaO—CaO—Na2O—CaF2—Cr2O3渣系的不锈钢脱磷

测定了１５００℃时磷在ＢａＯ－ＣａＯ－Ｎａ２Ｏ－ＣａＦ２－Ｃｒ２Ｏ３渣子和０．１２Ｃ－０．７１Ｓｉ－１８Ｃｒ不锈钢熔体之间的分配比，试验结果表明，该渣系的不锈钢脱磷能力比ＣａＯ基渣好，与ＢａＯ基渣相当。     

Cast bulk ZrTiAlCuNi amorphous alloys

Cylindrical bulk amorphous samples with diameters up to 10 mm have been prepared by casting ZrTiAlCuNi alloys in a copper mould. In order to rank glass-forming ability as a function of alloy composition, alloys were also cast into wedge-shaped moulds; to a first approximation, the thickness of the amorphous region obtained can be taken as an indication of glass-forming ability. The compositions which lead to the production of bulk glasses all have reduced glass transition temperatures in excess of 0.65 and the extremely high glass-forming ability of these compositions is discussed. We suggest that both the Al and Ti contents are determining factors for the production of bulk amorphous samples and these are believed to reduce the driving force for, and hence the rate of, crystallisation. These amorphous alloys have been found to display high thermal stability and can be annealed for several minutes in the supercooled liquid region. They are ductile at room temperature and have a high value of yield stress.     

ADSP2101FEL－ICE开发系统

本文介绍了一种数字信号处理器（ＡＤＳＰ－２１０１）的开发系统──ＡＤＳＰ２１０ＩＦＥＬ－ＩＣＥ。描述了它的基本功能和设计思想。     

三峡地区生态环境治理保护对策

三峡地区是全国山地灾害频发的地区之一，而由于工业的发展，沿江域镇环境污染已对长江水质构成威胁，三峡建库后，随着库区水位的抬高，长江流速变缓，排污能力减弱，易在城镇岸段和回水区形成污染带，为此，建议持续实施农业综合开发工程，扩大自然保护区，治理水土流失，改善农业生态环境，加大“长江上游防护林工程”、“长江上游水土保持工程”、“中低产田改造工程”的投资比重和治理范围，对于山地灾害防治的重点为地质灾害严     

Al2O3/TiB2/SiCw三元复合材料的力学性能及显微结构

以Al₂O₃为基体,SiC晶须和TiB₂颗粒两种增韧剂,采用热压烧结工艺制备了Al₂O₃/TiB₂/SiC_w三元复合陶瓷材料。研究了热压工艺参数对材料致密度的影响和晶须含量对该复合材料的力学性能和显微结构的影响。结果表明;随晶须含量的增加,该复合材料的热压温度和保温时间需要相应的增加;晶须拔出、裂纹偏转和晶须的桥接为该复合材料的主要增韧机理;随晶须含量的增加,该材料的室温断裂韧性增加;该材料的断裂韧性随温度的升高而呈增大趋势,并且晶须含量越高,材料的高温断裂韧性增幅越大。