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陶冶 《机械工程与自动化》2014,(6)
介绍了以VC++6.0为开发平台,利用Microsoft Access建立数据库,使用ODBC开放式数据库接口访问数据库,对SolidWorks进行二次开发的方法。通过API函数实现标准件的三维建模,并进行了实例验证。 相似文献
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Forbes RG 《Ultramicroscopy》2008,108(5):455-457
This appendix comments on the input data and simulation results of Radlicka and Lencová (RL), reported in the preceding paper. These simulations relate to the effects of space-charge on the full-width at half-maximum (FWHM) of the ion energy distribution from a gallium liquid metal ion source (LMIS), and on its virtual source size. Corrections are necessary to the input data, relating to LMIS shape, that were supplied by the present author. It is clear from RL's work that their simulations, when applied to the corrected shape data, would generate very good agreement between experimental results and numerical simulations concerning the FWHM. This work confirms that an inappropriate hydrodynamic condition has been used in past modelling programmes for LMIS shapes and current/voltage characteristics; consequently, some quantitative results from these old programmes must be considered unreliable in detail, especially at low emission currents, although qualitative trends have been correctly exhibited. 相似文献
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Atomic resolution imaging using the high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) can be applied to analyze the atomic structures of materials directly. This technique provides incoherent Z-contrast with the atomic number of the constituent elements. In the present work, unique contrasts that make intuitively interpreting the HAADF-STEM image in double perovskite oxide La2CuSnO6 difficult were observed. Multislice simulation confirmed that this occurred as an effect of the channeling process of electrons in combination with the effect of Debye–Waller factors. This was confirmed because in the La2CuSnO6 crystal, two independent Sn atoms and four independent La atoms in the unit cell had different Debye–Waller factors, and the La columns consisted of pairs of columns with a small separation, whereas the Sn atoms were arranged straight. 相似文献
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直流调节控制技术越来越广泛地应用于轧制领域。本文通过对590+全数字直流调速器在轧钢生产线的应用实践,详细描述了直流调节控制系统的基本原理、接口、工作特性,以及在实际应用中基本的控制方法,常规安装、调试过程和常见的故障报警处理方法。 相似文献
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本文介绍一种分段刻纹镀膜光纤温度传感器,它是用光刻法及化学腐蚀的方法在光纤包层上直接形成的。由于它不需要外部敏感元件,因此具有体积小、结构简单、稳定性好、灵敏度高和抗干扰能力强等优点,适合于温度的高速度和安全的远距离测量。这种光纤温度传感器的灵敏度由刻纹数、刻纹深度和镀层等决定。 相似文献
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提出了一种基于ARM7处理器S3C44B0X、以SD卡主控芯片W86L388D为核心的设计方案,为低端嵌入式产品提供SD卡功能.设计出了硬件电路图,并分析了SD卡的控制协议,给出了相应的软件设计方法,编写出了底层的驱动程序.通过实际测试分析了该方案的性能. 相似文献