Design and Experimental Studies of Single-stage and Double-stage Pulse Tube Refrigerators;
单级和两级脉冲管制冷机的设计和实验研究
Analysis of a single-stage high power factor electronic ballast with class-E resonant inverter is proposed.
提出了一种E类驱动结构的谐振式电子镇流器,将E类结构和buck-boost功率因数校正结构整合成一种单级式电子镇流器。
A single-stage and high power pulse tube cooler working between 20~40 K has been designed and constructed in order to precool the second stage of a 4 K separate two-stage pulse tube cooler.
为了满足液氦温区分离型二级脉管制冷机第二级预冷的需要,设计制作了1台20～40K温区单级大功率脉管制冷机。
Experiment of single stage G-M coaxial pulse tube refrigerator;
单级G-M型同轴脉冲管制冷机实验
The single stage and two stage SBR systems were investigated for treating high concentrated cattle farm wastewater and the performances were compared in terms of the removal efficiencies of carbon, solids and nitrogen.
对单级和两级序批式反应器 (SBR)用于牛场高浓度有机污水的处理进行了试验研究 ,对其污水处理性能进行了比较。
The introduction of dual-boost single stage DC/AC converter is firstly shown,the analysis of the converter s working principle is taken,and the logical relationship of the driver train to the power devices when they are working at SPWM state in the inverter is given.
介绍了双Boost DC/AC单级正弦波逆变电路结构,并分析了其工作原理。
The contradiction between cement density,cementing quality and leak in the hole can be solved by using the technology of single stage double plugging.
为提高固井质量,保证各开套管安全下送到位,采用内插法固井解决了超大套管固井的窜槽问题;采用单级双封固井工艺解决了超长易漏封固段固井质量、水泥浆密度与漏失的矛盾;采用先悬挂后回接的固井工艺实现超长管柱固井作业;采用塑性防窜超低密度水泥浆体系解决了恶性漏失地层的固井漏失问题;采用防塌、防气窜、抗高温水泥浆体系,解决了超深井段所固有的超高压、超高温引发的固井难题。
The technique of single stage extraction and continuous counter- current extraction have been opti- mized respectively.
采用单因素实验法对单级提取豆粕中的大豆异黄酮的工艺条件进行优化,同时优化连续逆流提取的工艺条件。