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利用PC机、单片机及传感器等,提出了设计思路,通过对系统的组成框图、电路实现、程序流程、检测项目等的介绍,开发研制了一种新型的智能电子台秤检测系统。该系统经实验测试,表明性能优良,原先手工测试需要十几分才能完成一台电子台秤测试项目,现在只需3－5分就能完成,使电子台秤出厂检验效率提高了2倍以上。具有良好的推广应用价值。 相似文献
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本文从分析雷达工程类专业毕业学员岗位任职能力和部队需求入手,结合地方院校雷达专业课程设置方案,针对部队院校的专业特殊性和新型装备的特点,以适应部队岗位需求为目标,探讨雷达工程类专业教学模式的改进方法。 相似文献
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介绍了该离心泵性能测试系统的测试原理及测试过程,给出了该系统硬件电路的方案设计,将计算机硬件接口电路与数字电路相结合。以实现离心泵性能检测控制的目的．系统的软件设计包括3部分:数据采集程序, 数据处理程序,绘性能曲线并实现打印、打印预览程序． 相似文献
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《实验室研究与探索》2020,(4):102-106
车载音响设备已成为汽车必不可少的一部分,因此有必要进行汽车音频系统的性能检测。为解决目前音频设备测量仪器功能单一、图形显示效果差、可扩展性差和价格昂贵等问题。利用虚拟仪器技术构建了一个车载音响性能检测系统,实现了对AM、FM和音频功率放大器性能的测试。硬件系统由数据采集卡、车载音频设备、音频信号发生器和个人计算机搭建而成。软件系统用LabVIEW设计,测试结果可以直观地显示在显示器上。系统参照国家标准,相对误差在0%～12%,3次测量相对误差平均值在0%～5%,基本满足技术要求。传统音频测试需要140 min;该系统在测试时间上与传统音频测试方式相比缩减了40 min左右,提高了音频测试效率。该设计可为汽车性能检测系统的研发提供参考依据。 相似文献
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随着国民经济的快速发展与科学技术的不断提高,同时由于国际市场不断增长的需求,我国电机行业得到了快速发展。由于电机种类与数量的增加,用于电机性能与质量指标测试的电机测试技术也不断发展。针对职业院校教师开展电机测试实验教学效果差以及一些负责电机检测的企事业单位实验效率低、人员劳动强度大等问题,提出并设计了一套基于虚拟技术的电机型式实验测试系统,包括计算机、控制柜、测量仪器柜等,可以实现空载实验、负载实验、堵转实验、温升实验等电机测试实验。经实验验证,该电机型式实验测试系统性能稳定,效果良好,弥补了现有电机测试技术中的缺陷。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献