Introduction to the microscopy of erosion

Erosion of materials by the impact of small solid particles, by the impact of liquid drops and by cavitation in a liquid is discussed. Erosion arising from these three sources is described, terminology is defined, and the methods available for erosion testing in the laboratory are reviewed. A brief discussion is presented of the microscopical techniques which have been used to study erosion, and some of their advantages and drawbacks are outlined.     

Introduction to the measurement of psychological attributes

This article introduces the measurement of psychological attributes, such as intelligence and extraversion. Examples of measurement instruments are discussed, as well as a deterministic measurement model. Error sources that threaten measurement precision and validity are discussed, and also ways to control their detrimental influence. Statistical measurement models describe the random error component in empirical data and impose a structure that, if the model fits the data, implies particular measurement properties for the scale. The well-known Rasch model is discussed along with other models, and using a sample of data collected with 612 students who solved 13 arithmetic tasks it is demonstrated how a scale for arithmetic ability is calibrated. The difference between psychological measurement and physical measurement is briefly discussed.     

浅谈感应淬火实际应用

利用感应淬火对轴类和钢板类工件进行局部热处理,使热处理硬度符合规定要求。结果表明：通过选用合适频率的感应设备,调整设备的感应电流和加热时间,并用感应设备对工件进行必要的回火处理,就能使轴类和钢板类工件局部热处理硬度符合要求,同时提高了生产效率,降低了生产成本。     

浅谈翻车机轨道衡的检定

本文简单介绍了翻车机轨道衡检定规程编制原因及变化过程,分析了新旧两种规程下检定方法及允差的差别。提出了新规程带来的不利影响及解决方法。     

浅谈液压系统的防渗漏

详细论述了液压系统渗漏油的主要部位及原因,并针对不同的原因制定了相应的防治措施。     

纳米机器人浅谈

纳米机器人是纳米技术中重要的研究课题之一.文章对纳米机器人的开发及其应用作了简介.     

浅谈雷达的保障性

雷达保障性是雷达可靠性、可维修性、自保障能力以及保障分系统保障能力的综合。从雷达设计者的视角分别从雷达的自保障性和综合保障两个方面阐述了雷达保障性的重要性和必要性。     

天线反射面精度检测

通过6.2 m卫星接收天线反射面精度的检测,简要介绍天线反射面精度的检测方法及数据处理。     

简述变比齿扇的设计

提高转向器的操控性能对于提高整车的操控性和舒适性至关重要。简要介绍变比齿扇的设计过程,提出了一种缩短设计时间和减少成本的范成齿扇的方法,此方法有效并适合同行业的使用。     

化学药品的贮存方法简介

工厂实验室需要用各种化学试剂,其中有不少是有毒的和易燃、易爆的危险药品。所以实验室存在各种不安全因素。如烧伤、中毒、失火、爆炸以及“三废”对环境的污染等。因此,为加强劳动保护管理,确保实验室安全,保护环境,必须了解化学药品的性质及保管方法。