The studies in existence showed that the solid solutions which based with mg2si and doped with other elements are good thermoelectric semiconductors working at mid - temperature ( 400 - 700k ) 已有的研究表明，以mg _ 2si为基、通过掺杂得到的固溶体是优秀的中温区( 400 - 700k )热电半导体材料。
Investigations have been made on the influence of the heating power , working pressure , stack packing ratio , and the opening of the orifice valve and the double - inlet valve on the performance of the system 以氦气为工质，获得了119 . 7k的脉管无负荷制冷温度，在国内首次用热声机械进入低温温区。
( 2 ) based on the analysis of lightning and satellite data , it was found that cg flashes generally occur in the cloud region with tbb < - 60 . negative flashes mainly occur at the front part of 负闪电主要发生在mcc云体的前部且云顶亮温最低的区域( <一70 ) ，正闪电主要出现在mcc最低云顶亮温区的后部。
A tunability of 60 % and figure of merit of 133 have been achieved under 30v dc bias , demonstrating their usefulness for frequency - agile microwave devices at the liquid nitrogen temperature 在液氮温区表现出很好的微波器件应用前景。 4 、采用pld方法制备了高凰100 )取向的bao . ssr05五o创51卿si集成薄膜。
Conclusion temperature is the biggest climate factor for the effect on the citellophilus tesquorum sungaris , its temperature range of survival has no obviously differences with other insects under the condition free of host 结论温度是对方形黄鼠蚤松江亚种生存影响最大的气候因子，游离状态下其生存温区与其他昆虫无明显区别。
3 . the upper guide pipe could avoid temperature zone on the spot by increasing its length , so as to make the temperature of junction end keep in normal condition , thus assuring high stability and precision in measurement 3 .上接管长度增长，避开现场外环境温区，使热电偶接线端处于常温状况，温度不受干扰，保障了测试精确度稳定性
The electric - heating - expanding of vermiculite was studied by using self - preparated electro - expanding furnace with multi - thermal areas . the influences of various factors on experimental results were analyzed and discussed 摘要利用自己研制的多温区电加热膨胀炉，对蛭石电加热膨胀进行了试验研究，并对影响试验结果的因素进行了分析讨论。
The suitable liqulfied nitrogen temperature range for special cryo - cotalal electric detectors , for measureing the tusmittal time of a shock wave , are developed , in order to create an optdrial precondition to test cryo - liquid twxtur more accuraely 专门研制的适用于液氮温区的低温同轴电探针(冲击波速度传感器) ，为精确测定低温混合液样创造了先决条件。
The large - scale superconducting magnets are presently widely used in modern high - energy particle accelerators and nuclear fusion experimental device , which generally operate at liquid helium temperature region . cryogenic technology is developing with the requirement of operation for superconducting magnets 而超导磁体大都运行在约4 . 5k ( - 269 )的液氦温区,这又促进了低温技术的发展。
The anticipant control curve approximating strategy and corresponding self - learning strategy are submitted and implemented very well . the result of expert control in three - tank liquid level equipment and three - zone high temperature furnace is satisfying 提出了期望曲线逼近策略及相应的自学习机制，并在专家控制器中得到较好的实现，在对三容水槽和三温区高温加热炉实施的专家控制中得到了较好的控制效果。
