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本文论述应用光学薄膜技术对汽车窗口玻璃和塑料的若干性能进行改进的技术发展水平,这些性能包括塑料表面的硬化,红外区的反射,紫外区的吸收,偏振化作用,双折射,憎水性以及光学角度选择性等,评论等离子体处理和物理蒸汽淀积薄膜工艺近来应用的一些例子。对于物理蒸汽淀积薄膜所提供的异常功能连同实际使用中它们的耐久性作了特殊的强调。 相似文献
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针对目前大功率固体激光加工系统的特点,结合相关产品使用的网络构架,研制开发了一套基于Internet的远程监控系统。它是一种将网络技术与系统监控相结合,在异地通过Internet实时监控系统的运行状态,并为系统的故障诊断提供依据的技术。该系统具有高效性、准确性和实时性等特点。在设计方面采用了先进的软件构架,可以实时监控激光加工系统的操作情况和参数状态;查询激光加工系统的当前数据和历史数据,并对开放权限的数据进行修改;通过和用户在线沟通完成疑难问题的解答。 相似文献
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Fereydoon Laal Amir Hossein Khoshakhlagh Esmaeil Zarei Rohollah Fallah Madvari Somayeh Farhang Dehghan 《声与振动》2022,56(4):297-306
After controls, including engineering and management, the final way to control noise is to use hearing protection devices. Due to the lack of a standardized questionnaire regarding investigating workers’ use of hearing protection devices on the basis of the BASNEF behavioral model, the present study was conducted to investigate the effect of health education based on the BASNEF model on the use of hearing protection devices in workers of an automobile manufacturing plant in Iran. This quasi-experimental and prospective intervention study was performed on 80 workers at an automobile manufacturing plant who are exposed to noise levels above 85 decibels and do not use hearing protection devices. In this study, 40 people working in a cast iron foundry were selected as the intervention group, and 40 working in aluminum casting were chosen as the control group. Questionnaires were analyzed at the beginning of the intervention and three months after the intervention in the intervention and control groups. There was no significant difference between the intervention and control groups before the intervention. There was a significant difference between the intervention and control groups after the intervention in the area of knowledge. A significant correlation was observed between the intervention and control groups after the intervention program in all areas of the BASNEF educational model except behavioral intention. In this study, the effect of educational intervention on the use of hearing protection devices was investigated, and with the educational intervention, it was tried to get help from influential people and enabling factors in education based on the BASNEF model. The results showed that the educational intervention based on the BASNEF model can improve the knowledge of individuals in both the intervention and control groups. 相似文献
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近红外传感器在汽车改造技术中的应用研究 总被引:3,自引:1,他引:3
利用反射式近红外传感器及语音录放组件,研究了汽车倒车防撞语音提示器。当汽车倒车时,只要距车身后尾一定的距离内有人或物体存在,就会有一部分红外光信号经人或物体反射回来,被与发射管同排安装的光敏接收管收到并转换成同频率的电信号后,由模块内部电路进行放大、解调、整形、比较处理后,在输出端输出控制信号,控制语音录放组件工作,告诉司机车后有人、车后有物体。由于近红外线传感器、语音录放组件均为一体化结构,成本低、接线简单、抗震能力强、测量准确、工作稳定可靠,适合在汽车上安装使用。 相似文献
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A method on how to take into account pump statistics and spontaneous atomic decays when calculating the photon-number distribution of lasers in photon-number representation is presented. The intracavity phonon-number and extracavity photocount distributions with binomial pump and spontaneous atomic decays are calculated. In two limit cases, the results of calculations transit respectively to the photon-number distributions of systems with common Poissonian pump and regular pump, and both with the spontaneous atomic decays being suppressed. 相似文献
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对交通事故的汽车碰撞进行简化分析,运用经典物理定律研究了汽车碰撞,较为简洁的分析了汽车碰撞过程中速度复杂的变化,希望在科学处理交通事故中提供一种简单方法。 相似文献
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