HCR水第金属冷冲压润滑剂的性能研究

本文通过实验测定了ＨＣＲ水系金属冷冲压润滑剂的各项性能参数，并详细论述了该助剂的各项性能，实验结果表明该助剂具有良好的油膜强度和摩擦系数，具有润滑，同油漆系合，对焊接无任何影响等综合性能。     

聚乙烯,聚氯乙烯薄膜在冷冲压拉深工艺中的应用

结合生产工艺,本文介绍了聚乙烯(PE)、聚氯乙烯(PVC)薄膜在拉深工艺中的应用,分析了聚合物薄膜的摩擦性能,润滑机理,重点论述了PE,PVC薄膜在小型单缸柴油机油底壳拉深工艺中的润滑作用,结果表明固体润滑剂具有比油脂润滑剂更优越的性能,同时指出,聚乙烯、聚氯乙烯等聚合物自润滑薄膜在金属塑性加工工艺中具有广泛的应用价值。     

电化学传感器批量测试系统设计

设计了一个电化学传感器批量测试系统,由传感器、放大电路、NI采集卡及CVI软件组成。该系统自动计算传感器各项指标,判断传感器是否合格,并对测得的数据进行处理、显示、绘图和保存等,最终实现了对电化学传感器性能进行批量智能测试的功能。该系统采用多线程编程,充分发挥了CVI函数库及NI采集卡的强大功能,保证各项工作的同时进行,具有操作简单方便、界面友好、测试效率高、可扩展性强、成本低和可靠性高的优点。经过对一氧化碳气体测试实验,该系统可及时有效地自动批量测试电化学传感器,实验准确度为100%。     

不锈钢冷冲压成形中的摩擦与润滑探讨

本文简要讨论了不锈钢机械性能对冷冲压加工性能的影响;冷冲压加工时的摩擦特点;目前所用润滑剂情况;润滑剂中各种添加剂的作用,提出研制新的专用润滑剂的必要性。     

多功能金属加工助剂的制备及性能研究

采用不同的有机羧酸醇胺盐作为防锈剂与丙二醇嵌段聚醚酯消泡剂复配,制备了多功能金属加工助剂,并研究其消泡、防锈、润滑性能。结果表明:防锈剂分子中极性基团越多,防锈剂添加量越大,防锈性能越好;添加防锈剂会削弱金属加工助剂的消泡效果,消泡性能随防锈剂添加量的增加而减弱;水溶液pH值对防锈性影响较大,较高的pH值对防锈及抑制工作液的腐败有一定的积极作用,而pH值对消泡性能影响较小。正交试验结果表明:采用质量比为1∶2的三元羧酸(三己酸-6,6′,6″-三聚氰胺)醇胺盐和蓖麻油酸醇胺盐为复合防锈剂,聚醚酯与复合防锈剂质量比为2∶1时,制备的金属加工助剂不仅具有良好的消泡效果,还具备良好的防锈性。通过考察润滑性能发现,该金属加工助剂还能显著提高水的承载能力,表现出较好的极压、抗磨减摩特性及润滑稳定性。     

基于汽车座椅的多功能加载试验机

为了对各种汽车座椅的各项性能指标按国家标准进行检测,研制了多功能加载试验机。该试验机系统包括加载模块、机架模块、升降模块与加载方向转换模块等,对各功能模块进行了设计。根据标准的测试要求,采用了两套力闭环控制系统,采用PID的控制思想,对伺服系统进行了控制。最后。利用本试验机对丰田卡罗拉汽车座椅头枕进行了测试实验。实验结果表明：该系统能实时地显示运行结果,实时地调整控制参数,具有性能可靠、稳定性好等特点,且需达到的力矩值和位移量在要求的误差范围内,满足了对汽车座椅性能的精确测量要求。     

微乳切削液防锈性研究

介绍了一种可用于微乳切削液的防锈水的防锈性能,并给出加入一定量该防锈水的微乳切削液的性能及应用情况。结果表明：本实验所得微乳切削液为浅黄色透明液体;该切削液中加入自制防锈水后,各项性能不仅达到国标要求,而且满足挂片实验15天不生锈的要求;该产品经使用实验证明防锈性、润滑性、冷却性、清洗性好,低泡沫,对环境无污染,对设备无腐蚀。对身体无毒害。长期使用无霉变。     

提高ABS塑料的抗老化性能研究

本文介绍了一种在１５０拖拉机盖板树脂原料ＡＢＳ中加入助剂来提高盖板的耐老化性能的方法。实验表明，加入树脂量０．８％的助剂能够显著缓解ＡＢＳ塑料的老化变色及机械性能的急剧下降，延长制品的使用寿命。     

基于 ATmega16的简易核桃烘干控制器设计

针对市场以及用户对核桃烘干提出的各项要求,研制一种简易的核桃烘干控制器。阐述了该控制器采用的关键技术以及设计方法,描述了功能验证及性能测试的相关实验及实验数据的分析。     

CRY—96切削液的合成研制

简要介绍了水溶性极压润滑添加剂、防锈添加剂、消泡剂以及助剂的合成筛选过程,最终研制出定名为CRY—96的化学合成型金属切削液,并通过了各项性能指标试验的评定和生产试验的检验,具有较高的实用价值。     

Experimental study of cavitation intensity using a novel hydrodynamic cavitation reactor

Journal of Mechanical Science and Technology - The cavitation intensity of a novel hydrodynamic cavitation reactor (HCR) was experimentally evaluated in terms of the amount of bubble generation and...     

Dynamic optimization of spur gears

This paper presents a global optimization method focused on gear vibration reduction by means of profile modifications. A nonlinear dynamic model is used to study the vibration behavior; such model is validated using data available in literature. The optimization method considers different regimes and torque levels; the objective function can be the static transmission error or the maximum amplitude of the gear vibration in terms of dynamic transmission error. The procedure finds the optimal profile modification that reduces the vibrations over a wide range of operating conditions. In order to reduce the computational cost, a Random-Simplex optimization algorithm is developed; the optimum reliability is estimated using a Monte Carlo simulation. The approach shows good performances for the computational efficiency as well as the reliability of results. Finally, an application to High Contact Ratio (HCR) gears is presented and an extremely good performance is obtained by combining optimization procedures and HCR properties.     

MODELING METHOD FOR PRODUCT STRUCTURE MAPPING BASED ON REVERSE SOLVING OF LOCUS AND MOTION

Aiming at the problem of structure design in reverse-design of mechanism, a structure mapping method based on reverse solving of locus and motion (RSLM) is presented. The mechanism scheme meeting the requirements of geometric and structural features is obtained through RSLM. The element instance subsets related to component are established based on the element type mapping, pair structure type mapping and design knowledge mapping between components and elements layer by layer. The assembly position mapping of elements is established based on the topological structure information of mechanism scheme, and the product modeling of structure mapping is realized. The algorithm program and prototype system of product structure mapping based on RSLM are developed. Application samples show that the method implements the integration of scheme design, assembly design and structure design, and modeling for product structure mapping based on RSLM. The feasibility of assembly is analyzed in scheme design that contributes to reducing the design error, and raising the design efficiency and quality.     

Histochemical and ultrahistochemical localization of heavy metals in calf organs

Cadmium, zinc, selenium, and copper were administered, singly or in combination, orally or subcutaneously. Experiment I included 32 calves of both sexes; six received Cd (two groups), Zn, Cd, and Zn, and Cd and Se (two groups) and one group was a control. In Experiment II (21 bulls), three were given Cd, Cd, and Cu, and Cd and Zn, respectively, and one group was a control. For light microscopy, in Experiment I the highest amounts of silver granules were present in the samples of liver, small intestine, and vesicular gland of all the exposed groups; in Experiment II the most affected organs were liver, kidney, and small intestine. For electron microscopy, in Experiment I, after administration of Cd and Zn, the highest amounts of granules were seen in the cytoplasm of hepatocytes and cells of the proximal and distal renal tubules and the lowest amounts were found in glandular cells of the pancreas. Administration of Cd and Se resulted in the presence of large numbers of granules in the nuclei and nucleoli of spermatogonies. In Experiment II, ingestion of Cd and Zn in feed led to the appearance of highest amounts of granules in the nucleoli, nuclei, and cytoplasm of cells in testes, kidneys, and pancreas. Following Cd intake, the highest accumulation of granules was observed in the nucleoli of hepatocytes and cells of the proximal and distal renal tubules. Combined Cd and Cu produced the highest number of granules in cells of the proximal and distal renal tubules and in the nucleoli and nuclei of germinal epithelium.     

Mass spectrometry analysis of the influenza virus

The role of mass spectrometry to probe characteristics of the influenza virus, and vaccine and antiviral drugs that target the virus, are reviewed. Genetic and proteomic approaches have been applied which incorporate high resolution mass spectrometry and mass mapping to genotype the virus and establish its evolution in terms of the primary structure of the surface protein antigens. A mass spectrometric immunoassay has been developed and applied to assess the structure and antigenicity of the virus in terms of the hemagglutinin antigen. The quantitation of the hemagglutinin antigen in vaccine preparations has also been conducted that is of importance to their efficacy. Finally, the characterization and quantitation of antiviral drugs against the virus, and their metabolites, have been monitored in blood, serum, and urine. The combined approaches demonstrate the strengths of modern mass spectrometric methods for the characterization of this killer virus. [This article was published online 10 September 2008. An error was subsequently identified. This notice is included in the online and print versions to indicate that both have been corrected 7 November 2008.]     

气化炉三维扫描测量与数据处理

以德士古气化炉耐火砖的内壁蚀损检测设备为基础,对采集到的点云数据做了进一步处理.通过对数据的筛选和剔除,实现了数据点的平滑降噪细化和精简.然后利用点云对整、网格划分和分色显示等方法,最终完成了内壁腐蚀情况的三维建模.重点讨论了点云数据的预处理及后处理的方法,并根据内壁耐火砖的腐蚀阈值,提出了一种气化炉内壁腐蚀区域的识别与分割方法.对耐火砖的腐蚀分析、气化炉的生产与维修提供了可靠依据,并在工程应用中获得了一致认可.     

Semiautomated methods for cancellous bone histomorphometry using a general-purpose video image analysis system

Semiautomated methods are used to measure elongated, curved and complex branching profiles and isolated perimeter segments in monochrome video images with a general-purpose analysis system. These methods are used to make the major primary measurements of bone histomorphometry. Accuracy and reproducibility of the image acquisition, processing and measurement system is documented by measuring a semicircular standard of known dimensions. Semiautomated applications of the Ar/Le method for measuring areas and perimeters, and calculating lengths and widths of osteoid seams, lengths of mineralization labels and mineral apposition rate, wall width, indirect measurements of eroded, osteoclastic and osteoblastic perimeters without tracing, and measurement of mineralized or total cancellous bone area and perimeter gave values comparable to measurements of the same parameters by tracing or grid counting techniques with equal or better reproducibility and much greater efficiency. Intraindividual variation in measuring multiple bone biopsies was comparable to that reported with current standard methods. Major sources of variability for semiautomated methods were image magnification and selection of profile edges by thresholding, and sources of variability for manual methods are image magnification, numbers of orthogonal intercepts, tracing speed and accuracy of the algorithm used to measure traced pixels. Semiautomated methods are accurate, reproducible and rapid methods suitable for bone histomorphometry.     

DESIGN AND ANALYSIS OF NOVEL ACTIVE ACTUATOR TO CONTROL LOW FREQUENCY VIBRATIONS OF SHAFT SYSTEM

Aiming at providing with high-load capability in active vibration control of large-scale rotor system, a new type of active actuator to simultaneously reduce the dangers of low frequency flexural and torsional vibrations is designed. The actuator employs electro-hydraulic system and can provide a high and circumferential load. To initialize new research, the characteristics of various kinds of active actuators to control rotor shaft vibration are briefly introduced. The purpose of this paper is to introduce the preliminary results via presenting the structure, functions and operating principles, in particular, the working process of the electro-hydraulic system of the new actuator which includes a set of high speed electromagnetic valves and a series of sloping cone-shaped openings, and presenting the transmission relationships among the control parameters from control signals into the valves to active load onto shaft. The course of the work is dynamic, and a series of spatial forces and moments are put on the shaft to get an external resultant force to reduce excitations that induce vibration of shafts. By checking states of vibration, the actuator can control the impulse width and the interval of injection time for applying different control force to a vibration shaft in two circumference directions through the regulating action of a set of combination directional control valves. The results from simulating analysis and experiment show evidence of that this design can satisfy the case of active process of decreasing of flexural and torsional vibrations.     

BODY PRESSURE DISTRIBUTION OF AUTOMOBILE DRIVING HUMAN MACHINE CONTACT INTERFACE

Aiming at the fatigue and comfort issues of human-machine contact interface in automo- bile driving and based on physiological and anatomical principle,the physiological and biochemical process of muscles and nerves in the formation and development of fatigue is analyzed systematically. The fatigue-causing physiological characteristic indexes are mapped to biomechanical indexes like muscle stress-strain,the compression deformation of blood vessels and nerves etc.from the perspec- tive of formation mechanism.The geometrical model of skeleton and parenchyma is established by applying CT-scanned body data and MRI images.The general rule of comfort body pressm'e distribu- tion is acquired through the analysis of anatomical structure of buttocks and femoral region.The comprehensive test platform for sitting comfort of 3D adjustable contact interface is constructed.The test of body pressure distribution of human-machine contact interface and its comparison with subjec- tire evaluation indicates that the biomechanical indexes of automobile driving human-machine con- tact interface and body pressure distribution rule studied can effectively evaluate the fatigue and comfort issues of human-machine contact interface and provide theoretical basis for the optimal de- sign of human-machine contact interface.     

一种角位移电涡流传感器的原理及应用

设计并实现了一种小角度双E形电涡流角位移传感器，可用于加速度计及陀螺仪闭环控制的校正回路。运用涡流等效原理，从理论和计算上分析了其原理，分析了其反力矩的形成，推导了电涡流传感器的输出方程。对该传感器的输出特性和频率响应特性的实验结果作了分析，结果表明了其可行性，对设计和应用同类传感器有一定的指导意义。