软土地基水泥搅拌桩室内配合比试验分析

对广州南沙某工程软土地基搅拌桩室内不同配比的水泥土标准试件进行对比试验,研究软土地基搅拌桩施工中水泥、石膏等添加剂的最佳配比方案,对指导搅拌桩的现场施工有着重要的意义。     

P油田长4+52小层孔隙度三维模型的建立

为了更准确的评价P油田主要产层长4 52小层的储集能力，以随机模拟建模方法对该层的孔隙度进行研究，建立孔隙度分布三维模型。研究表明，长4 52小层属于低孔储层，平均孔隙度为11．85％。根据P油田储层物性分类原则，该储层在本区分布较为广泛，是今后挖潜的重点。     

机械锁定式地层测试技术研究与应用

机械锁定式测试技术操作简单，测试一次成功率高，资料录取准确全面，且测试结束后可直接进行封堵作业；解封时，机械锁紧产生一个向上的震击力，有利于解封，没有换位机构的测试阀在关井期间使管柱处于自由拉伸状态，有利于保护油管。在N阀上部管柱中加1-2根伸缩接头，便可用于海洋井测试。     

平面药包抛掷爆破的漏斗特征解析

根据惠州港通用码头陆域平面药包抛掷爆破的实爆堆积测量分析成果 ,结合药包设计的主要参数 ,对平面药包产生的爆破漏斗的范围与形态、不同药包部位的残方比与抛掷率、药包的长抗比与圆柱体药包的应力波形演变关系予以解析 ,供硐室爆破的理论研究、模拟试验和总结条形药包特性时参考     

Effect of polymerization conditions on o‐phenylenediamine and o‐phenetidine oxidative copolymers

A series of new o‐phenylenediamine (OPD)/o‐phenetidine (PHT) copolymers with partly phenazine‐like structures has been successfully synthesized at three polymerization temperatures by chemically oxidative polymerization in four different polymerization media. The molecular structures and properties of the resulting OPD/PHT polymers were investigated by IR, UV–vis and high‐resolution ¹H NMR spectroscopies, and DSC, in order to ascertain the effect of reaction temperature, comonomer ratio and acid medium. The copolymerization mechanism of OPD with PHT monomers has been proposed. It is found that the statistical OPD/PHT copolymer obtained at a temperature of 118 °C has a higher degree of polymerization than that obtained at 12–17 °C. The OPD content in the copolymers calculated from NMR spectroscopic analysis is higher than that in the feed OPD content, whereas the OPD content calculated from element analysis is slightly lower than the feed OPD content. It can be predicted that denitrogenation takes place in the OPD units during the polymerization process at OPD/PHT molar ratios of 90/10 and 100/0. These OPD/PHT copolymers exhibit a much better solubility than the OPD homopolymer, hence suggesting an incorporation of PHT units into the phenazine structure of the homopolymer. The thermal behavior of the copolymers was also studied. Copyright © 2004 Society of Chemical Industry     

参数强迫激励下非线性振子尖点型奇点的分叉

本文首先研究了不具有Z_2—对称性时的规范形理论和退化向量场的普适开折理论。然后利用这些理论研究了参数激励与强迫激励联合作用下非线性振动系统的尖点型奇点的余维2退化分叉。     

新一代开放式自动抄表系统平台

本文提出了建立新一代的开放式自动抄表平台的思想,并着重介绍了构建平台的基本原则、技术要求和设计方式。     

Emulsifying Capacity and Emulsion Stability of Soy Proteins Compared with Corn Germ Protein Flour

Both emulsifying capacity (EC) and emulsion stability (ES) increased with increasing concentrations from 0.4% to 0.8% of soy flour (SF), soy concentrate (SC), soy isolate (SI) and corn germ protein flour (CGPF) when studied by response surface methodology. EC and ES increased as pH increased from 6 to 8 in all samples. Increasing incubation temperatures of protein solutions from 20–70°C or from 4–20°C did not affect EC or ES, respectively. SF had the highest EC, followd by SI, SC, and CGPF.     

DS18S20在单总线多点测温系统中的应用技巧

DS18S2 0是一种新型的单总线数字温度传感器。该器件在实际应用中 ,如果使用不当不但无法发挥其优势 ,反而会引入不必要的误差 ,文章重点阐述了它的使用技巧和方法     

工程制图精品课程建设的探索与实践

论述了为培养高素质人才,全面提升高等教育教学质量,必须积极推进和实施工程制图精品课程建设及其建设目标。从加强师资队伍建设、教学内容与课程体系、教学方法与手段、教材与教学资源、实践教学、教学效果等方面探索了工程制图的教学改革和课程建设实践。总结了制图精品课程建设的特色和所取得的成果,并提出了进一步应探讨和研究的一些问题。