某柴油机用单体泵主要参数优化设计

针对某配用单体泵柴油机在运行中出现的油耗增加、排放变差、凸轮早期磨损等情况,建立了单体泵运动件的三维模型,通过运动学和动力学分析并结合喷油泵台架试验,指出了问题最主要根源——原单体泵凸轮型线工作段包角过小。根据这种情况和国Ⅳ排放要求对单体泵凸轮型线和柱塞弹簧等进行了重新设计。     

再谈ZXJ型弹性支承的应用──兼答复衡阳轴承厂杨连江同志的意见

为不断提高制造厂的产品质量，我们开发了“用户之声”专栏。欢迎广大用户充分利用这专栏，反映机床及其配套产品使用中出现的问题，让制造厂解答，以便充分发挥产品的效能。下面就是成都市清江机械厂厂长对我们去年第１２期用户之声的答复。     

储层沉积微相与储层非均质性关系研究--以文留油田文65断块沙二下为例

文留油田文65块发育水下分流河道、水下分流河道侧翼、水下天然堤、水下分流间湾、滨浅湖泥5种微相。储集砂岩以水下分流河道为主．水下分流河道侧翼和水下天然堤次之。水下分流河道砂岩分层系数大,砂岩密度高．顺物源方向砂体连通性较好．垂直物源方向连通性变差．渗透率的垂向韵律表现为复合韵律或均匀型．非均质性程度中等偏弱。水下分流河道侧翼、水下天然堤等微相分层系数小．砂岩密度低．渗透率表现为正韵律．非均质性程度中等偏强。     

新型复合缓蚀剂对青铜文物的防腐蚀研究

为评价苯骈三氮唑(BTA)和甲酸钠(SFA)复合缓蚀剂对青铜文物的防腐保护能力,利用电化学方法研究了复合缓蚀剂对青铜试样在3％(质量分数)NaCl溶液中电化学行为的影响,并通过X射线光电子能谱技术(XPS)分析了复合缓蚀剂对青铜表面膜成分的影响.结果表明,SFA的加入增强了BTA对青铜的腐蚀抑制作用,提高了青铜表面膜电...     

A new cleaning process combining non-ionic surfactant with diamond film electrochemical oxidation for polished silicon wafers

This paper presents a new cleaning process for particle and organic contaminants on polished silicon wafer surfaces.It combines a non-ionic surfactant with boron-doped diamond(BDD) film anode electrochemical oxidation. The non-ionic surfactant is used to remove particles on the polished wafer's surface,because it can form a protective film on the surface,which makes particles easy to remove.The effects of particle removal comparative experiments were observed by metallographic microscopy,which showed tha...     

基于化学机械动力学的碱性铜抛光液平坦化机理研究

The planarization mechanism of alkaline copper slurry is studied in the chemical mechanical polishing (CMP) process from the perspective of chemical mechanical kinetics.Different from the international dominant acidic copper slurry,the copper slurry used in this research adopted the way of alkaline technology based on complexation. According to the passivation property of copper in alkaline conditions,the protection of copper film at the concave position on a copper pattern wafer surface can be achieved without the corrosion inhibitors such as benzotriazole(BTA),by which the problems caused by BTA can be avoided.Through the experiments and theories research,the chemical mechanical kinetics theory of copper removal in alkaline CMP conditions was proposed. Based on the chemical mechanical kinetics theory,the planarization mechanism of alkaline copper slurry was established. In alkaline CMP conditions,the complexation reaction between chelating agent and copper ions needs to break through the reaction barrier.The kinetic energy at the concave position should be lower than the complexation reaction barrier,which is the key to achieve planarization.     

基于AHP-Entropy的电网营销服务网点投资合理性模糊综合评价研究

为解决当前电网营销服务网点投资分析效率低、局限于主观经验或只局限于客观数据评价的问题,提出了一种综合AHP-Entropy和模糊综合评价法的综合评价方法,针对电网营销服务网点投资合理性的综合评价目标,设计了一整套评价指标体系,运用AHP-Entropy主客观结合的方式求取指标权重,建立了一套适合于电网营销服务网点投资合理性评价的多目标模糊数学模型。该模型可为营销服务网点投资合理性评价提供有效的支持,且能够对营销服务网点撤并方案提供有效的辅助支撑。     

油酸异辛酯的合成新方法

以甲基磺酸钙为催化剂催化异辛醇与油酸的酯化反应合成油酸异辛酯,考察了催化剂用量、反应温度、醇酸配比及反应时间对酯化反应的影响。当催化剂用量为0.5%(以总物质的质量计),反应温度120～130℃,当异辛醇与油酸的量比为1.3∶1,反应时间5h时,酯化率可达99.6%。     

移动统一通信产品的分析探讨

移动统一通信市场正在迅猛发展，新功能以疯狂的速度不断增加。因此，我们将确定供应商的这个大类，找出它们的总体性能，以此区分它们的显著特点。对于企业内部如何实现统一通信，提出了一些解决方法。