共查询到16条相似文献，搜索用时 156 毫秒
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根据布氏硬度试验原理编制程序在MTS880试验机上进行硬度试验,经过反复试验论证,此方法是可行的,操作简单,数据精确,且具有诸多优点,解决了许多实际问题,开发了该类试验机新功能。 相似文献
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针对四种腰骶骨内固定器制品,自行设计、制造了可与MTS809拉扭试验机通用夹头过渡连接的、测试非对称薄壁曲面试件压缩和扭转结构力学性能的辅助夹具。试验结果表明,借助该辅助夹具,实现了试件与通用试验机过渡连接;辅助夹具有效地传递了压缩载荷和扭转载荷,并保持力和力矩中心线在试验过程中始终不变。 相似文献
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说明了Delphi5对三层结构和MTS/COM+技术的支持机制,阐述了以MTS/COM+为中间件的三层结构的典型构建过程,并介绍了应用实例。 相似文献
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对GH4169镍基高温合金制成的薄壁圆管试样的多轴循环相关特性进行了研究。试验在MTS809-250 kN/2000 Nm电液伺服拉-扭低周疲劳试验机上进行,采用恒幅总应变控制,对称加载,轴向应变与扭转应变的加载采用三种不同相位(0°、45°和90°),其加载频率分别为0.1 Hz和0.2 Hz,试验温度为650℃.通过对薄壁圆管高温多轴比例和非比例循环加载试验,研究了该材料在多轴循环载荷下的应力-应变响应和循环相关特性。试验结果表明,GH4169合金在试验温度下不通加载路径下均呈现为循环软化现象,其循环软化程度与等效应变和轴向与剪切方向之间的相位差密切相关。 相似文献
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介绍了EX1629数采系统在某型飞机复合材料方向舵剩余强度试验中的准备和应用过程,为损伤复合材料结构剩余强度的判定提供了精确数采结果。试验前,针对飞机复合材料结构损伤特点,采用无损检测手段确定损伤区贴片具体位置,先后解决了损伤结构贴片、飞机试件表面数采布线及试验现场传感器配置等问题。根据试验传感器特性对各数采通道进行两点线性度标定,同时满足了试验数据采集与计量审定要求。最终,利用AeroPro软件完成EX1629数采设备与MTS控制加载设备的协同应用,更好地发挥了试验设备数据采集的数据完整性、配置灵活性、高度集成性以及网络连通性。 相似文献
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《实验室研究与探索》2007,(11)
MTS工业系统(上海)有限公司是MTS系统公司的中国全资子公司,MTS系统公司成立于1966年,并在美国NASDAQ独立上市,其总部位于美国明尼苏达洲的首府明尼亚阿波利斯市,是全球最大的高科技力学性能测试及模拟系统制造商,是该领域的先驱和领导者。其产品和服务主要应用于科研、产品开发、质量控制等领域,范围涉及试验设备、分析软件和优秀工程解决方案咨询,主要包括:动静态材料试验系统、汽车零部件及整车台架试验系统、飞机零部件及整机结构试验系统、生物结构测试及模拟系统、建筑结构测试及地震模拟系统、地质及土壤测试系统、纳米硬度表… 相似文献
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李红宇 《江西电力职业技术学院学报》2011,24(3):18-21
介绍了在南海发电一厂1号机组汽轮机DEH系统调试过程中,汽轮机挂闸、并网、甩负荷试验、阀门活动试验方面出现的问题,分析了造成这些问题的原因,并给出了解决方案. 相似文献
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WANG Dong-hua 《实验室研究与探索》2007,(10)
利用NI的LabVIEW软件平台及其DAQ卡等硬件构建多通道数据采集系统,与MTS试验机配合使用,既保留了MTS试验机精确稳定可靠的优点,又发挥了LabVIEW虚拟仪器强大灵活的信号采集及处理特长,在实际试验中高效准确地生成并记录了需要的数据,出色的完成了预期的试验任务。 相似文献
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WANG Liang 《实验室研究与探索》2007,(10)
文中介绍了MTS810-5T疲劳试验机的数字函数发生器单元(410.31)无法产生正常各种试验波形的故障情况、并分析出现该故障的原因以及制定相应的维修方案。本次故障是算术逻辑部件(ALU)不能进行正常的数学运算所造成的,更换算术逻辑部件(ALU)之后,试验机的函数发生器单元恢复正常使用。 相似文献
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In Experiment 1, we used six procedures in a series of unsuccessful attempts to obtain relational learning using trial-unique pictorial stimuli in pigeons. The Experiment began by testing conventional (three-key) matching-to-sample (MTS) and nonmatching-to-sample (NMTS); in subsequent stages of the experiment we progressively incorporated features of techniques that do obtain relational learning in a single-key apparatus. In Experiment 2, we found that acquisition of NMTS using pictorial stimuli proceeded no more rapidly than acquisition of a conditional discrimination. Experiment 3 showed that acquisition of NMTS was more rapid than acquisition of MTS when plain colored stimuli were used, but not when pictorial stimuli were used. These three experiments suggest that pigeons do not recognize pictorial stimuli shown on different keys. In Experiment 4, between-key recognition was obtained with familiar but not with novel pictorial stimuli. It is argued that perceptual learning facilitates the detection of the between-key identity of complex stimuli, and that perceptual processes may underlie the difficulty in demonstrating relational learning in pigeons. 相似文献
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论述了在用MTS810材料试验机进行静动态性能测试的原理及方法,并对三种汽车传动轴减振器试件分别进行静刚度、动刚度特性测试。测试结果表明,这种方法简单、有效。试验结果为汽车传动轴减振器的改进提供了参考依据。 相似文献
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Bruria Shayshon Hagar Gal Bertha Tesler Eun-Sung Ko 《Educational Studies in Mathematics》2014,87(3):409-438
The instruction of mathematically talented students (MTS) in heterogeneous classes is an issue of debate. Questions of equity, differential instruction, teacher awareness of their talented students’ needs, and their willingness and competence to face the challenges of nurturing these students are all raised within this context. Our international study compared South Korean, American, and Israeli teachers of mathematics perspectives concerning their (a) perceived competence to teach MTS (b) perceived competence in addressing MTS’ needs through differential instruction, (c) support for separation of MTS into special math classes, and (d) equity views concerning MTS’ needs. Data was collected by means of a questionnaire presented to 80 South Korean, 145 Israeli, and 58 American teachers of mathematics. Findings suggested that most teachers in these countries perceived themselves as competent to teach MTS, while very few of the participants supported the separation of MTS into special classes. South Korean teachers perceived themselves to be less competent in teaching MTS as well as in applying differential instruction and agreed more than their foreign counterparts that the fostering of mathematically weak students is more important than the fostering of MTS. Teachers who had some mathematical background appeared to perceive themselves as more competent to teach MTS than teachers who had no mathematical background. Teachers who predominantly taught large classes felt less competent to teach MTS than teachers who predominantly taught medium-sized classes. Findings were partially interpreted within the perspective of cultural differences. Recommendations for teachers’ professional development are drawn. 相似文献
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马田系统是一种新的模式识别技术,这种技术的主要思想是通过构造一多维基准测量空间对多维数据资料进行诊断与预测。通过对马田系统基本原理的研究,将其应用于Fisher关于鸢尾花类型的判别问题,结果表明,MTS方法具有良好的判别效果。 相似文献
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研究了轧后不同快速冷却工艺对低碳低硅钢组织及性能的影响。试验结果表明,轧后快冷返红温度为600℃时,试验钢的冲击韧性最好;返红温度为550℃时,钢的强度有所上升但塑性降低,冲击韧性有所下降;返红温度控制在650℃时,粗大碳化物从奥氏体晶界析出,导致低温韧性显著降低。 相似文献