2—羟基—4—仲辛基—二苯甲酮肟与HEHEHP对钯的协同萃取

研究了２羟基４仲辛基二苯甲酮肟（Ｎ５３０）与２乙基已基２乙基已基膦酸（ＨＥＨＥＨＰ）的氯仿溶液,从高氯酸介质中对钯的协同萃取。采用斜率法确定萃合物的组成为：Ｌ·Ｐｄ·Ａ。协萃反应平衡常数为ｇ Ｋ１２＝ １６５８,协同萃取配合物的生成常数为β１２＝ １７４。计算了协同萃取反应的热力学函数值     

牙轮钻头滑动轴承仿生鲨鱼皮织构化表面润滑性能

牙轮钻头在超深井和大水平井的使用受到广泛关注,由于地层环境复杂化,为了使牙轮钻头有更高的稳定工作性。通过对合金材料表面织构化处理减摩效果的研究,结合鲨鱼皮减阻润滑的优势,针对牙轮钻头薄弱环节滑动轴承摩擦结合面进行了仿生鲨鱼皮织构化处理,基于所选取仿生织构的形貌参数构建滑动轴承流动润滑理论模型,采用有限差分法求解,获取润滑油的油压分布、承载能力及滑动轴承摩擦力,并探究阶跃冲击载荷下滑动轴承动压油膜的响应情况。结果表明：牙轮钻头滑动轴承流体润滑状态下,深径比大于0.3且面积率大于0.25的仿生表面织构对油膜承载力有增强效果;仿生表面织构在较低油膜压力下对油膜摩擦力影响突出,油膜摩擦力提高了14.12%;偏心率越大仿生表面织构对油膜承载力的提升效果越好,在偏心率为0.8时承载力提高效果达到200.45%;同时仿生织构的对滑动轴承流体润滑的轴向稳定性有提升效果。牙轮钻头滑动轴承仿生织构化处理有效地改善了滑动轴承润滑性能。可见,合适的织构尺寸能进一步提高滑动轴承处于流体润滑的适用工况范围,提高牙轮钻头的使用寿命。     

有机磷农药——敌敌畏时间分辨化学发光分析的研究

文中根据鲁米诺-H2O2体系中敌敌畏与Co2+化学发光动力学性质的不同,建立了敌敌畏的时间分辨化学发光分析法.该法可对存在于一些金属离子的混合溶液中的敌敌畏进行测定,在最优条件下,混和溶液中的敌敌畏浓度在2×10-8～3×10-6g@mL-1范围内(Co2+浓度小于3.0×10-2μg·mL-1)呈较好的线性关系.     

间硝基苯乙酮双缩硫代对称二氨基脲与CuCl_2、NiCl_2、CoCl_2配合物及其抗癌活性研究

合成了间硝基苯乙酮双缩硫代对称二氨基脲（ＨＬ）及其与ＣｕＣｌ２、ＮｉＣｌ２、ＣｏＣｌ２的配合物,通过元素分析、红外光谱、紫外光谱、磁化率、摩尔电导等对配体和配合物进行了表征．测试了配体和配合物的抗癌活性     

Scale dependence of tensile strength of micromachined polysilicon MEMS structures due to microstructural and dimensional constraints

The success of microelectromechanical systems (MEMS) as a key technology in the 21st century depends in no small part on the solution of materials issues associated with the design and fabrication of complex MEMS devices. The reliable mechanical properties of these thin films are critical to the safety and functioning of these microdevices and should be accurately determined. In order to accomplish a reliable mechanical design of MEMS, a new microtensile test device using a magnetic-solenoid force actuator was developed to evaluate the mechanical properties of microfabricated polysilicon thin films with dimensions of 100—660 mm length, 20—200 mm width, and 2.4 mm thickness. It was found that the measured average value of Young抯 modulus, 164±1.2 GPa, falls within the theoretical bounds. The average fracture strength is 1.36 GPa with a standarddeviation of 0.14 GPa, and the Weibull modulus is 10.4—11.7, respectively. Statistical analysis of the specimen size effect on the tensile strength predicated the size effect on the length, the surface area and the volume of the specimens due tomicrostructural and dimensional constraints. The fracturestrength increases with the increase of the ratio of surfacearea to volume. In such cases the size effect can be tracedback to the ratio of surface area to volume as the governing parameter. The test data account for the uncertainties inmechanical properties and may be used in the future reliability design of polysilicon MEMS. The testing of 40specimens to failure results in a recommendation for design that the nominal strain be maintained below 0.0057.     

Application of Fuzzy Mathematics in the Evaluation of Textbooks in institutions of Higher Learning

ＡｐｐｌｉｃａｔｉｏｎｏｆＦｕｚｚｙＭａｔｈｅｍａｔｉｃｓｉｎｔｈｅＥｖａｌｕａｔｉｏｎｏｆＴｅｘｔｂｏｏｋｓｉｎｉｎｓｔｉｔｕｔｉｏｎｓｏｆＨｉｇｈｅｒＬｅａｒｎｉｎｇ￥ＬＩＪｉａｎｎｉｎｇ；ＹＡＮＸｉａｎｍｉｎｇ（ｓｈａｎｘｉＵｎｉｖｅｒｓｉｔｙ...     

Casimir Force Correction Between Parallel Polysilicon Plates

IntroductionIn 1 948Casimir predicted an attractive forcebetween two neutral metal plates.The force is dueto the metal boundaries altering the zero pointelectromagnetic energy E=Σ∞n (1 /2 ) hωn,wherehωn is the photon energy in each allowed photonmode n[1] .The Casimir effectis significantin someareas in the physics and cosmology of thin films,and may present strong restrictions on theconstants of hypothetical long- range interactions.Casimir equation combines the macroscopic and themicro…     

KPO_3-MoO_3体系平衡固相的研究

本文对ＫＰＯ３－ＭｏＯ３体系平衡固相作了较详细的研究．用Ｘ－射线衍射证明在５０ｍｏｌ％ＫＰＯ３－５０ｍｏｌ％ＭｏＯ３处及７５ｍｏｌ％ＫＰＯ３－２５ｍｏｌ％ＭｏＯ３处有两化合物存在．３１Ｐ核磁共振进一步证实它们的化学式为ＭｏＯ３·ＫＰＯ３和３ＫＰＯ３·ＭｏＯ３的可靠性，同时测定了各平衡固相的熔化热     

活塞环自由型线CAD系统研制探讨

介绍活塞环自由型线ＣＡＤ系统的设计思想,系统以弹性力学理论和数值计算方法为基础,能自动生成活塞环的轮廓曲线,环周－径向压力分布图,编写加工工艺,编制技术文件,并为活塞环的数控加工提供精确的数据。系统操作简便,实用性强。     

多媒体网络技术与未来教育模式

本文介绍了多媒体网络概念及多媒体网络技术的现状与发展。展望了多媒体网络技术在未来教育中的应用前景。