适用于剥离工艺的光刻胶图形的制作技术及其机理讨论

研究了AZ－1350胶的正、负转型和形成适用于剥离技术的倒台面图形的工艺技术，并对一些机理性问题进行了讨论。     

碳纤维增强塑料手术台

英国福瑟吉尔与哈维(Fothergill&Harvey)公司复合材料部用碳纤维增强塑料模制了一种新型的手术台台面。这种手术台台面可使手术简化,并能更好地进行X光检查。手术台台面要求坚牢,有刚性。多数手术台台面是由几个可以独立定位的部件构成的,以便用各种方式支撑病人。大多数手术台台面是钢制的,并带有可使手术台部件移动的金属传动机构,这些金属材料是照射X光的巨大障碍。因此,在对病人进行X光检查时,必须将病人在手术台台面上移动,直至要检查的部位对准台面     

振动台在无限流体域中台面附加质量研究

 船舰外壳装有声纳传感器用来接收来自水下的声纳信号，船体的振动必然会对声纳传感器的工作产生影响，因此有必要设计水下振动台来模拟水中船体的振动，然后在振动台的台面上安装传感器来进行模拟研究．设计一个工作台面在水体中的振动台，必须考虑水介质对台面的附加影响，这对振动台所需的推力设计、台面几何形状设计等是十分重要的．从振动台台面流固耦合运动方程出发，通过有限元方法，分别计算了台面在空气中和水下振动的加速度谐响应．通过比较台面上不同部位上几个关键结点耦合前后平均加速度值的变化，计算出了各个频率下的附加质量，并对附加质量给振动台设计带来的影响进行了研究．     

实验室台面的新革命

众所周知，实验室台面在整个实验室家具中占有重要的份额，实验室台面性能的高低，直接影响到实验室操作人员的安全和实验室台面的使用年限。与目前中国市场上的实验室台面相比，美国DURCON公司研发的都抗板更符合实验室台面的操作条件和使用要求。在菲律宾马尼拉，美国DURCON公司的一个客户虽然更换了多次柜体，但正在使用的实验室台面依然是40年前从美国DURCON公司购买的都抗板。     

亚毫安室温连续工作InGaAs垂直腔面发射激光器

报道了ＩｎＧａＡｓ应变量子讲垂直腔面发射激光器（ＶＣＳＥＬ）的室温连续工作。在ＭＢＥ生长过程中利用红外高温仪测量了表观衬底热辐射振荡，实现了原位厚度监测；采用阶梯型分布布拉格反射器（ＤＢＲ）及腐蚀倒台面结构，降低了器件串联电阻。对于２×３μｍ２的台面结构ＶＣＳＥＬ，室温连续工作阈值电流一般为１．５ｍＡ，最低达到０．７ｍＡ，阈值电压为２．５伏，输出功率达到０．５ｍＷ，激射波长为０．９４ｕｍ，量子效率为１２％。     

加速度计高频振动校准中的相关技术问题

加速度计在高频振动校准中会出现中低频校准中不存在的问题,本文对这些问题:加速度计的连接、台面弯曲的影响、加速度计的相对运动等做了分析,并通过实验给出了台面均匀性修正参数。     

地震模拟振动台试件与台面相互作用的力反馈补偿控制

电液伺服地震模拟振动台试验过程中存在试件与台面相互作用,导致振动台系统的幅频特性曲线在试件自振频率及附近范围产生峰值和陷波,影响台面振动的实际输出。为消除试件与台面相互作用对振动台系统控制性能的影响,在三参量控制的基础上引入力反馈补偿控制,并通过单台振动台试验中单自由度试件、多自由度试件模型进行了试验仿真分析,结果表明力反馈补偿控制补偿了试件与台面相互作用对振动台系统性能的影响,通过控制方法的误差影响分析验证了该方法对于振动台试验控制的有效性。     

机械振动台台面的结构分析与优化设计

以某一机械式振动台的台面为研究对象,利用UG对其进行了三维实体建模,然后以IGES格式导入有限元分析软件ANSYS Workbench,对其进行模态分析,得到了台面的前6阶振型和相应振型。经过对台面进行结构优化设计,提高了台面的固定频率,使其满足预定要求,同时也为整个台面设计以及后续的动力学特性研究提供了理论依据。     

用多齿分度台检定平板仪

由于光学平板仪的照准仪没有坚轴，在检校过程中进行正倒镜变换时只能依仗校验台面和两枚标针定位，这既不精确，又很繁琐，且操作劳动强度大。引人精密多齿分度台后，可以淘汰标针，实现照准仪的完全固定安置，避免重复定位，检校的精度和效率都有所提高，劳动条件亦有所改善。本文论述的正是走这一途径的正确性与具体做法。     

影响动态公路车辆自动衡器的因素分析

对影响动态公路车辆自动衡器的几种非计量器具本身特性的因素：上坡、下坡、扭曲路面、汽车轴间距、动态汽车衡台面高于路面、动态汽车衡台面低于路面、动态汽车衡台面呈斜坡等作了计算分析,并得出了相关结论及相互关系。     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.     

Analysis of marine hydrobiont lipid extracts as possible cryoprotective agents

We studied a combined effect of the cryoprotectants both of lipid and carbohydrate origin at the presence of DMSO or without it on cell viability and the RNA synthesis in the embryonic mollusc and echinoderm cell cultures obtained at different developmental stages. Cryoprotective properties of exogenous lipids correlated with their thermotropic behavior. Lipid extracts from marine hydrobiontes, which thermal transitions are characterized by relatively small part of calorimetric thermogram area lying at temperatures above 0 °C (6–18%), were found to possess a considerable cryoprotective activity. The results are discussed in relation to the prediction of the cryoprotective activity of lipid extracts for marine animal cells. In addition, it was found that marine invertebrate cells can be cryopreserved without DMSO at the presence of trehalose and lipid extracts of some marine hydrobiontes.     

Low-Temperature Properties of Silver

Pure silver is used extensively in the preparation of high-temperature superconductor wires, tapes, films, and other configurations in which the silver not only shields the superconducting material from the surrounding materials, but also provides a degree of flexibility and strain relief, as well as stabilization and low-resistance electrical contact. Silver is relatively expensive, but at this stage of superconductor development, its unique combination of properties seems to offer the only reasonable means of achieving usable lengths of conductor. In this role, the low-temperature physical (electrical, thermal, magnetic, optical) and mechanical properties of the silver all become important. Here we present a collection of properties data extracted from the cryogenic literature and, to the extent possible, selected for reliability.     

Early ironwork in Biscay: Survey,excavation, experimentation and materials characterization. An integral study of the mountainside ironworks (ferrerías de monte or “haizeolak”)

ABSTRACT

The production of iron in Biscay (Basque Country, Spain) has been a hallmark of this territory of the North of the Iberian Peninsula throughout its history. The Archaeology team of the Basque Country Mining Museum has spent 13 years, so far, studying the origins of this activity through the evidences left at the old pre-hydraulic iron production workshops known as mountainside ironworks (ferrerías de monte) or haizeolak. It has catalogued 170 archaeometallurgical sites of this type in Biscay, and the archeological excavation of some of them has led to the knowledge of the different stages of the production process that took place in these workshops. The team has also experimentally reproduced the work carried out in a mountainside ironworks from the High Middle Ages, and it has currently started the characterization process of this type of activity through the study of the collected materials.     

Mechanism Study on the Wear of CrAlTiN Coated High-Speed Steel Twist Drills Under Dry Cutting Conditions

As demands about environment protection are growing up, dry cutting technology is getting more and more concerns from all over the world. Main works performed here are study on dry cutting performances and wear mechanisms of M2high-speed steel (HSS) twist drills with CrAlTiN multicomponent coatings, which was deposited using magnetron sputter ion plating system, in drilling 45 and 30CrMnSiA steel, and their comparisons to those in drilling the same steel but using monolayer CrN and commercial TiN coated drills. Drilling performances of drills are evaluated mainly through the measurements of width on outer corner flank land and the cutting forces. Results show that performances of CrAlTiN coated drills are better than those of monolayer CrN and TiN coated drills. In drilling 45 and 30CrMnSiA steel, the average tool life of the CrAlTiN coated drills are 17.2 and 11.8 times higher than those of the uncoated drills. Observing wear of the drill with scanning electronic microscope, results show that there is no crack or spallation of the CrAlTiN coatings in wear zones. Main mechanism of the wear here is adhesion.     

Study on Bond Ability of Arc-Spraying Coatings with Different Surface Pretreatment on Cast-Iron

Arc spraying coatings are widely used in various applications, but uncommon in cast iron substrate. Different surface pretreatment technology is tested on substrates of gray cast iron. Surface roughness and residual stress were measured by TR200 and X-ray diffraction analyzer. Influence of different surface pretreatment methods ( dry blasting and fusebond) on roughness and residual stress was analyzed. The arc-sprayed coatings of wire 3Cr13 (φ2mm) on gray cast iron substrate is studied. The microstructure and interface of bonding layer were observed by SEM. The bond strength was taken by tensile test. Results show that bond strength with grit blasting is higher than fuse-bond; it is feasible to make wire 3Cr13 coating with arc spraying on cast iron substrate roughened by grit blasting.     

Structural Characteristics of TiO2 Ceramic Coating by Micro-Plasma Oxidation

TiO2 ceramic coatings with thickness of 20 μm were formed on the surface of pure titanium by micro-plasma oxidation. Their micro-structures were investigated by by using X-ray diffraction and their surface images were detected by using scan electronic microscope. There were three kinds of TiO2 coatings, pure anatase type TiO2 phase, mixed phases consisted of rutile type TiO2 phase and anatase type TiO2 phase, pure rutile type TiO2 phase. The coating surface with the pure anatase type TiO2 phase is rough, while the coating surface with the pure rutile type TiO2phase is smooth. The upper coating surface with the mixed type TiO2 phases is anatase type TiO2 structure and the subsurface of the TiO2 coating is rutile type TiO2structure.     

Evaluation of fatigue life of steel using steel grain size

The insightful discussion of the relationship between the construction of metallographic and fatigue life and proposition of mathematical relationships describing this relationship was conducted in the paper. This paper presents a method for estimating the fatigue life, based on the construction of the microstructural material taking into account the grain size and the participation of ferrite and pearlite phase.