电刷镀技术在港机零件修复中的应用

结合典型的港机零件用电刷镀技术修复的实例，对电刷镀工艺中钝态铬居上的电刷镀、组合镀层中过渡层和工作层的材料选择，凹坑、擦伤和密集伤痕的修复以及镀层质量检验问题进行了探索，进而对港机零件用电刷镀修复的合理性作了初步分析。     

家族文学研究的分层与守界原则

家族文学研究成为学术热点的同时,也出现了结论大而无当     

柑橘皮中橘皮油、果胶、橙皮苷的提取与利用

讨论了柑橘皮中橘皮油、果胶、橙皮苷的提取与综合利用．     

从运行调度角度探讨珠三角管道分输调度计划的编制

以珠三角成品油管道为模型,结合一个输送周期内油品批次运行图,阐述了具有多分输站成品油管道运行调度计划编制过程;通过对运行过程的跟踪分析,介绍了调度计划软件编制过程中应该考虑的几点因素.     

公路工程软土路基处理方法选择

就公路工程中软土路基目前比较常见的加固技术及其适用条件进行阐述,结合现场施工经验,就有些方法的施工要点和施工工艺进行分析,并对施工现场常用的处理软土路基及弹簧土的方法进行论述,供类似工程选择。     

离子渗氮化合物层对4Cr5MoSiV1模具钢热疲劳性能的影响

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　 4Ｃｒ5ＭｏＳｉＶ1ｓｔｅｅｌ (ＡＩＳＩＨ13ｏｒ 84 0 7)ｉｓｏｎｅｏｆｔｈｅｍｏｓｔｐｏｐｕｌａｒｈｏｔｗｏｒｋｉｎｇｄｉｅｓｔｅｅｌｓ .Ａｓａｍａｊｏｒａｌｕ ｍｉｎｕｍｃａｓｔｉｎｇｄｉｅｍａｔｅｒｉａｌ,ｉｔｈａｓｔｏｅｎｄｕｒｅｔｈｅｒｍａｌａｎｄｍｅｃｈａｎｉｃａｌｉｍｐａｃｔｏｆｍｏｌｔｅｎａｌｕｍｉｎｕｍａｔｅｌｅｖａｔｅｄｔｅｍｐｅｒａｔｕｒｅ ,ｗｈｉｃｈｒｅｓｕｌｔｓｉｎｆａｉｌｕｒｅｓ ,ｓｕｃｈａｓ ,ｈｅａｔｃｈｅｃｋｉｎｇ ,ｃｏｒｒｏｓｉｏｎｏｒｓ…     

粉煤灰路面基层试验路的施工

主要介绍了在漳平粉煤灰路面基层试验路的施工过程中,粉煤灰的化学组成、配合比及路基处理、混煤灰的拌和、运输、摊铺、碾压等施工工艺。     

Long memory and nonlinear dependence structure in crude oil futures returns and volatility

In order to investigate the nature of international crude oil futures and present evidence of long memory and nonlinear dependence for crude oil futures volatility as well as returns, a certain number of recent statistical tests, such as the powerful BDS test, the fractional integration test and other known statistics, are applied. The results show that though the returns themselves contain little serial correlation, the market volatility series have significant long-term dependence structures which may have important implications for volatility forecasts and derivative pricing. On the other hand, evidence of strong ARCH effect is also presented, and, moreover, the BDS statistics on the standardized residuals of the fitted GARCH model indicate that the ARCH-type process may generally explain the nonlinearities in the data. It seems that the crude oil futures market can be appropriately modeled by ARCH and fractal processes. These findings indicate that it would be beneficial to assess the behavior of the crude oil and price the oil derivative contracts by encompassing long memory and nonlinear structure.     

气相色谱法测定花生油掺伪的方法研究

用气相色谱法测定了花生油和一些常见植物油的脂肪酸组成及其含量,使用添加法在花生油中掺入不同种类、不同浓度的植物油,并进行了相关分析.发现油中脂肪酸组成及其特征组分的变化成线性规律,由此做出工作曲线,可快速定性、定量掺伪油,且掺伪量的最低检出限可达到5%.     

设备润滑管路的设计与安装

论述了工业生产的大型设备中必不可少的润滑脂管道的设计与安装问题。