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This paper discusses the reason of failure in gray cast iron ingot mould under thermal cycling condition from temperature field, thermal stresses ,the change process of coefficient of crack sensitivity,graphite oxidization and growth of cast iron in high temperature in the process of using ingot mould.

从钢锭模使用过程中的温度场、热应力、裂纹敏感系数的变化过程以及石墨氧化、高温下铸铁生长等角度对灰铸铁钢锭模在热循环条件下的失效原因进行了探讨。

This article describes the conditions of production and application of middle and small-sized RE-Mg ductile iron ingot mold during the last three years, and gives main properties of these ingot molds mechanic properties at room and high temperatures, resistance to oxidation and thermal fatigue, critical phase transformation temperatures and coefficient of thermal expansion,etc.

本文介绍了三年来采用稀土镁球铁材质制造中、小型钢锭模的生产试制和使用情况。报导了此种钢锭模的主要性能(常温与高温机械性能、抗氧化与热疲劳性能、临界相变点与热膨胀系数等)和表示出机械性能与化学成分间相互关系的回归方程。

Result］ The light inhomogeneity had effect on success rate of establishment of diabetes rat model but had no influence on the stability of the model.

结论］光照的不均匀性对糖尿病大鼠成模率有一定的影响，但对其成模后模型的稳定性无影响。

The temperature time curve of the heated die cavity and the relation between temperature and time under different initiatory temperature were determined .

测定模膛加热的温度-时间曲线及不同起始温度下模膛温度与时间的关系。

In this paper, we further research P-injective modules, define the concept of prime injective modules and prime injective dimension of module, and discuss the properties of them.

本文在[3]的基础上进一步研究了P-内射环，对于交换环我们引入了素内射模和模的素内射维数的概念，讨论了它们的性质。

Input offset voltage, input bias current, and even CMR may be quite GOOD over PART of the common-mode range , but much worse in the region where operation shifts between the NPN and PNP devices.

在各自的共模范围内，输入失调电压、输入偏置电流甚至共模抑制CMR也许都十分的好，但在NPN元件和PNP元件间的工作交替的区域却更坏。

Maximum input bias current is 10 pa and typically remains below 300 pa over the entire industrial temperature range. despite the jfet inputs, the ad8220 typically has a noise corner of only 10 hz.

为了满足高性能、便携式仪器、已最低的ad8220共模抑制比在86分贝直流模抑制比生理电信号80分贝，最低为5克=1千赫。

This system is designed based on SPCE 061A microcontroller to measure the close loop parameters of the amplifier. The system can measure the input offset voltage、the input offset current、the open loop AC differential mode voltage gain、the AC common mode rejection ratio and unit gain bandwidth,using the measure method of assistant amplifier. What is more, data printing is completed in this system.

摘要本系统是基于SPCE 061A 单片机的运算放大器闭环参数测试系统，该系统采用辅助运放测试方法，可对运放的输入失调电压、输入失调电流、交流差模开环电压增益和交流共模抑制比以及单位增益带宽进行测量，并具有将测试数据打印输出的功能。

This paper discusses common model Insert Loss and differential mode IL of electromagnetic interference filters of switching mode power supply,and studies theoretical analysis and measure is gained,various reasons of effect IL are analysed and its improvement methods is got.

研究了电磁干扰滤波器的共模和差模插入损耗，并进行理论分析和测量；分析了影响IL的各种原因及改进方法。

Precision round pin, mode pin, insert molding mold parts; Division I accumulated more than ten years work experience, can produce high-precision products, such as the complexity of T-mode, such as set pieces.

精密圆梢、模针、成型镶件模具零配件；我司积累十余年工作经验，能生产出高精度的产品，如复杂笔模、镶件等。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。