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As a special micro-power source, thermoelectric micro-generator is of interest for its applications in Micro-Electro-Mechanical Systems. Electrochemical deposition method took the advantage at the fabrication of thermoelectric material in micrometer scale. In this paper, the detailed reduction processes of Bi~(3+) and HTeO~(2+) were studied for the first time. And thermoelectric nanowires were also prepared by electrochemical deposition. On the basic study of thermoelectric material, detailed exploration was made to the design and fabrication process of thermoelectric micro-generator.

作为一种特殊的微动力能源,微型温差发器在微机系统中的应用前景引起了人们极大的兴趣,化学沉积方法在制备微米级尺寸的温差材料方面具有显著的优势,本文对Bi~(3+)和HTeO~(2+)离子的化学还原过程展开了详细的研究,并尝试了利用化学沉积方法制备Bi_2Te_3纳米线材料,在温差材料研究的基础上,对微型温差发器的结构设计和制造过程进行了详细的探讨。

In this thesis, the radiation principle and the structure of slot antenna are studied and the impacts on its performance of every structure parameter in a slot antenna design are analyzed. On this foundation, a design plan of planar slot array antennas is proposed. The design has some structural feature as follows:(1) with different dielectric layers and microstrip line structure to guide the electromagnetic wave effectively;(2) the feeding network formed of microstrip line can match with the radiating slots expediently;(3) in order to increase the bandwidth of the antenna, the wider slot and branched feeding microstrip line are adopted to form a double resonance.

本文对缝隙辐射的原理、缝隙天线的结构作了探讨,分析了缝隙天线设计中各结构参数对其性能的影响,并在此基础上提出一种平面型缝隙天线的设计方案,它具有以下的特点:(1)采用分层结构,以不同的介系数和微带线结构形成对磁波的有效引导;(2)利用微带线构成馈网络可以方便地与辐射缝隙进行匹配;(3)增大缝隙的宽度,并利用馈微带线的枝节形成双谐振,以增加天线的带宽。

It is indicated that only a single resonance peak appears in the amplitude versus frequency curve without spurious resonance peaks during the procedure. The direct actuation enables to improve the tuning accuracy, weaken the possible sample damage by the tip, and enhance the atomic force microscope bandwidth and imaging rate.

研究表明,采用压探针的直接激振方法在探针振动的幅频曲线中仅有单一谐振峰,可以避免在压陶瓷管激振方法下由液体振动造成的寄生谐振峰,因此使用压探针不仅提高了探针振动频率的控制精度,而且减小了针尖对样品的损坏,还提高了仪器的带宽和成像速度。

Purpose To approach to e fficacy of transcutaneous electrical ner ve stimulation for labor pain of parturient.Methods 120 parturients were randomly divided into TENS,oxytocin and control groups,and labor pain,pain tendency,cervical opening time,effcetive uterine contraction rate and blood cort isol content were compared in the three groups.

为探讨皮刺激对产妇分娩镇痛的效果,在针刺穴位的应用及皮刺激机理的研究的基础上,将120例产妇随机分为皮组、催产素组、空白组3个组,分别对分娩疼痛程度、疼痛进展趋势、宫口张开时间、有效宫缩频率及血中皮质醇含量等多项目进行对比。

Analyses the features and the problems of the hydraulic station with the cross spring electro-hydraulic pressure regulator and improves the station by replacing the cross spring electro-hydraulic pressure regulator with the electromagnetic proportional valve.

分析了十字弹簧液调压装置液压站的特点及存在的问题,采用BYMD型磁比例阀代替十字弹簧液调压装置,对液压站进行改造,实践证明,改造后的液压站性能明显优于改造前,提高了提升系统的安全可靠性,对正在使用十字弹簧液调压装置液压站的改造具有推广价值。

The hole mobility in vertical and horizontal directions were measured by means of time-resolved or transient electroluminescence and field-effect transistor methods for poly2-methoxy-5-(2'-ethylhexyloxy-1,4-phenylenevinylene.

以时间解析激发光和场效应晶体方法可分别量测得MEHPPV的垂直方向与平行方向之洞载子迁移率。

However, the problem depends on majority electromotor is not very effective, resemble induction motor, universal motor and wasteful electromotor instrument drive in that way efficiency is low.

然而,问题在于绝大部门念头都不长短常有效,就像感应念头、交直流两用念头和不经济的念头械驱动器那样效率低下。

Curing kinetics of epoxy resin and the effects of different compositions on curing reaction were researched by using the differential scanning calorimeters. Relationship between curing temperature and curing converting rate had been studied. Curing conditions for the system were determined. Modified nano-Al2O3/epoxy resin and core shell/epoxy resin composites were prepared by means of blending method. The influence of the composition on the properties was discussed. The thermal and dielectric properties of these composites were investigated using differential scanning calorimetry, Thermogravimetry and dielectric analyzer.

首先,论文通过差示量热扫描仪分析研究了环氧树脂与酸酐固化体系的固化反应动力学及固化工艺;然后,通过共混法和超声分散法制备了一系列纳米氧化铝/环氧树脂及核壳粒子/环氧树脂两相复合材料;进而通过DSC及热重分析仪测试了复合材料的玻璃化温度、热降解温度等热学性能,并采用介分析仪测试分析了复合材料的介常数、介损耗等介性能,讨论了组成对复合材料的热学性能及介性能的影响。

ABSTRACT The principle and characteristics of Solid Oxide Fuel Cell were analyzed systematically.

本文系统地分析了固体氧化物燃料池的原理与特点,研究了SOFC系统中的催化作用机理,比较了SOFC中的各种阴极催化剂和阳极催化剂的。。。

Based on the situation of COD over standard from gas field wastewater ,the study work of COD degradation process and procedures parameters with iron chip electrolyse method is carried out.

针对四川气田水外排COD超标问题,研究了内解法脱除气田水中COD工艺及方法,并推荐了内解法处理气田水的工艺流程及参数,介绍了通过室内实验及现场放大试验结果,证明了内解法处理气田水中COD可达到排放标准要求。

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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。