船闸人字闸门易磨损件材料的应用

结合万年闸船闸人字闸门维修,分析问题原因,探讨船闸人字闸门运转件中易磨损件材料的选择,阐述对国内自润滑材料的认识。     

新造船舶有害物质清单编制方法

考虑到IMO在2009年已通过了"香港国际安全与无害环境拆船公约",虽然该公约尚未生效,但随着国际社会对环保的呼声日益高涨,此公约提前生效的可能性极大,为了研究如何实施该公约,通过对一艘5.5万t散货船的有害物质清单调查与编制,探讨编制流程与编制要领,分析需解决的问题,供新造船舶有害物质清单的编制参考。     

Response of benthic infauna and epifauna to ocean disposal of red clay dredged material in the New York Bight: A study using sediment-profile imaging, surface imaging and traditional methods

In 1997, approximately 1 million cubic yards of consolidated red clay was dredged from Newark Bay in New Jersey and deposited on the seafloor at an open-water dredged material disposal site located on the inner continental shelf of the New York Bight. To address concerns about the ability of benthic organisms to colonize the seafloor deposits of this compact, organic-poor red clay, monitoring surveys were conducted in 1998 (1 year after disposal) and 2002 (5 years after disposal). The surveys used a combination of sediment imaging and traditional grab sampling methods to characterize physical and biological conditions over the surface of the red clay deposits in comparison to nearby reference areas consisting of either naturally-occurring, sandy surface sediments or deposits of unconsolidated, muddy dredged material. Sediment-surface and sediment-profile images (SPI) collected in summer 2002 indicated that the surface of the red clay deposits had become much smoother and more heterogeneous in texture compared to images collected in 1998. The images also indicated that these deposits had become colonized to a much greater degree by relatively abundant and diverse infaunal and epifaunal communities compared to 1998. Taxonomic analysis of benthic grab samples confirmed the imaging results and indicated relatively high infaunal organism abundance and diversity over the red clay deposits in 2002 compared to the reference areas. However, the structure of the benthic community inhabiting the red clay was fundamentally different from the communities in the reference areas, due to the differences in sediment texture and composition. The combination of imaging and traditional taxonomic approaches used in this study provided much greater insight on the red clay colonization process than either approach by itself.     

彩色防滑材料新技术在公路中的应用研究

彩色路面防滑系统是一种双组分丙烯酸改性树脂材料路面防滑系统,不仅对景观美化和道路安全方面有着明显的改进,同时因其面层耐磨耗,可以对普通路面起到延长寿命的作用。彩色防滑路面的引入,对改善我国交通恶化的现状,有着积极深远的意义。     

水泥砼路面滑模施工布料机械配置探讨

从技术、经济和操作使用角度，对水泥砼路面滑模施工中的布料机械配置情况进行了探讨，建议有关单位采用轮胎式挖掘机布料，较方便、合理     

基于SQL的机车检修数据库构建技术的研究

机务段建立重点检修设备网络系统是适应机务管理网络化的要求,对提高机车检修质量具有重要意义,检修数据库的构建是其中一个重要的组成部分,在简要介绍重点检修设备网络系统的总体构成设想基础上,分析了检修数据库建立的软硬件环境,提出用结构化查询语言来构建检修数据库是较好的选择,对数据库的逻辑设计、物理设计和安全性设计等方面提出了初步建议和设想,以建立一个完整、安全和实用的机车检修数据库.     

耐久性混凝土对水泥品质的要求

铁路客运专线要求采用耐久性混凝土,其中对所用水泥的品质要求比常规混凝土严格,结合对《铁路混凝土结构耐久性设计暂行规定》和《铁路混凝土工程施工质量验收补充标准》的理解,介绍耐久性混凝土所需水泥的主要技术要求。     

混凝土连续梁桥沥青铺装有限元分析

利用通用有限元软件对三跨预应力混凝土连续梁桥的沥青混凝土铺装进行应力分析,通过荷载不同位置下的沥青混凝土铺装层拉应力、剪应力分析,确定出荷栽的最不利布置位置。分析荷载最不利布置下铺装层模量对铺装层拉应力及层间剪应力的影响规律,为桥面铺装层材料选择及研究提供参考。     

高校教材建设及教材管理改革研究

教材管理与教材建设是高等学校基本教学条件建设之一,是搞好教育改革、提高教学质量的关键．本文结合近年来我国高等教改革发展趋势和教材建设与管理方面的实践,论述了如何适应高等教育教学改革需要,加强高等院校教材建设与管理的思路和措施。     

纳米科技发展的思考

纳米科技是20世纪后期逐步发展起来的新兴科技.文章介绍了纳米科技在发达国家的发展和应用状况,且在分析我国纳米科技的发展状况的基础上,结合我国的国情,提出了加快我国纳米科技发展的建议和策略.