查询词典 experimental research

To improve the stability of Arcjet discharge plasma in low current and high voltage mode, research on the demand of output characteristics of Arcjet Power Conditioning Unit was conducted. In this paper, based on PWM invertors and current mode control, using MOSFET as the main power device, an Arcjet Power Conditioning Unit was developed. Through adding a closed loop feedback circuit of output voltage, it can make the output characteristics of PCU be positive resistance to ensure the stability of Arcjet discharge plasma. The experiment indicates that this PCU can make Arcjet engine work at high voltage mode (100 V, 10 A) and ensure the stability of arcjet discharge plasma. Finally, it provides the experimental data of Arcjet when working.

为了解决小电流、高电压下电弧火箭等离子体的稳定性问题，研究了电弧火箭发动机对电源调理单元的输出特性要求，基于逆变电源脉宽调制技术与峰值电流型控制原理，以MOSFET为主功率器件，研制了一台电弧火箭电源调理单元，给出了Arcjet工作时的实验数据，通过增加PCU输出电压的闭环反馈电路，可以使PCU的输出外特性呈现正阻性，保证电弧的稳定燃烧，实验结果表明，该电源调理单元能使电弧火箭发动机达到高电压工作模式(100V， 10A)，保持电弧工作的稳定性。

The traditional technology of iron carbide production exists the problem that the reaction time is too long. The research of adding the additive into the ore of the fluid-bed was carried out in order to find the catalyst of this reaction. It was found out that K2CO3 and CaCl2 can be the catalysts of this reaction. The reacting time and equilibrium data in addition of K2CO3 and CaCl2 were examined and were campared with the contrastive experimental results respectively. The theoretical dynamics analysis also reveals that both K2CO3 and CaCl2 can accelerate the iron carbide forming reaction.

摘 要：传统的碳化铁生产工艺存在反应时间较长的难题，为此通过在流化床入炉矿石中配加部分添加剂的还原实验研究，以寻求该反应可能的催化剂，缩短反应时间，提高碳化铁生产效率和经济效益采用CaCl2和K2CO3作为反应的催化剂，利用反应所测数据，与对比实验相比较，并结合动力学分析，得出CaCl2和K2CO3可以加速碳化铁还原反应进行的结论。

To meet the teaching requirement, an intelligent apparatus laboratory is needed. Under this background, we research and develop an experimental device of intelligent protection for motors in mine.

我校为满足教学的需要，建设智能电器实验室，在此背景下，我们自主研制矿用电动机智能保护实验装置。

Research on biological effects of low-intensity electromagnetic field is always inconsistent with each other,which comes from low strictness and low repeatability of experimental results.

由于实验结果的不严密和重复性较差，弱电磁场生物效应的研究一直存在着较大的分歧。

In order to analyze and design the fiber optical isolator with YIG sphere, it is necessary to thoroughly research on the coupling efficiency, the optimization and the measurement for the coupling of monomode fibers with a lens as well as the theoretical analysis and experimental measurement of "Lamipol"polarizer.

本文介绍有关光纤隔离器的一些研究内容，着重探讨一种以磁光晶体球为主体的光纤隔离器，引入Lamipol高性能薄膜偏振器，使器件调节环节少，有利于器件的小型化。

The Division of Neurology is primarily dedicated to teaching and research in neurology including molecular aspects of xenobiotic enzymes, epilepsy, percutaneous carotid and vertebral artery angioplasty, In vitro and in vivo experimental studies on neuroprotective effects of neuropeptides during focal cerebral ischaemia, cardiovascular and autonomic complications during the acute stage of stroke.

神经学分部主要致力于神经学的教学与研究，其研究领域包括异生化合酶类的分子相，癫痫，颈动脉和脊椎动脉血管成形术，脑局部缺血中神经肽的体内和体外神经保护，急性中风时的心脏血管和自发的并发症等。

In the first part of this research, a thermal chip was wised for developing an automatic experimental and measurement system to simulate the temperature arising during the real operation condition of a chip.

研究的第一部份，应用热晶片发展一套自动化实验及量测系统，模拟真实封装体工作时内部之升温情形。

There are three groups in our research design, two of them are experimental groups, in which we will respectively test the effectiveness of regenerating and reconstructing palate bone defect, another group act as negative control one.

本研究中设计两组实验组和一组阴性对照组，分别来验证胶原膜和复合Hr-BMP的多功能胶原膜对实验动物腭部骨质缺损的再生及修复作用。

Ccording to the needs of structure vibration monitoring and active control technique, a research on fiber optic smart structure vibration shape perception and SMA actuating control was conducted by using space sailboard structure as an experimental model.

bstract 以模拟太空帆板结构为试验模型，针对振动状态监测与主动控制技术需求，着重进行柔性光纤机敏结构振动形态感知及其形状记忆合金致动控制研究。

The traditional algorithms of classification are no longer suitable because of the effect of the concept drift in data streaming. The research on fast and stable data mining systems with high accuracy has become more valuable in both theory and practice. The effect of low frequency concepts on time and space performance is studied and an LFCR algorithm is proposed in this paper, which reduces the low frequency concept with some mechanisms. The extensive experimental study shows that LFCR has improved performance in classification in comparison with RePro.

由于数据流中概念漂移现象的影响，使得传统的分类方法不再适用，因此研究快速、精确及稳定的数据流挖掘方法和系统具有较高的理论和应用价值；文章研究了基于频度的概念漂移中低频概念对分类时空性能的影响，提出了对其中的低频概念进行消减的算法，实验表明LFCR算法比RePro算法有更好的分类性能。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。