上电

The numerical results of stationary and transient Green'sfunction for high-velocity surface-head wave on some selected crystals are comparedThrough the above analyse,it is indicate that the first arrival wave mode is thelongitudinal-wave head-wave,and its propagate velocity is equal to the groupvelocity of the longitudinal bulk wave alone the surface.Furthermore,this modedoes not have the Δv/v effect,i.e.,its velocity is the same no matter the surface isfree or metalized.

通过对表面激发的瞬态和稳态Green理论分析和数值计算，表明在压电晶体表面上实际上看到的最高速的最先到达的波动模式是纵波头波，它具有沿表面纵波的群速度，而且对压电晶体，它不具有Δv/v效应，即在自由表面和金属化表面其传播速度是一样的，而压电晶体表面波及伪表面波均存在Δv/v效应。

Based on analyzing various overseas designs of electrical connectors and their working conditions, the author redesigns a new type electrical connector.

在分析研究了国外各种电接头设计的基础上，根据电接头工作状态和环境，重新设计出一种新型电接头。

They explain the interaction between these parameters, and help to the design of active vibration control system of piezoelectric smart cantilever beam. On the above, the optimal model with m pairs of PZT sensor/actuator and state equation are established, and the PZT films position/length and the feedback control gain are optimized with the method of moving asymptotes.

在此基础上，本文进一步研究了同位布置多对压电传感/致动元件的悬臂梁关于压电传感/致动单元对的布置、长度和控制增益的优化设计模型，并利用MMA(the method of moving asymptotes)算法对压电片的位置、尺寸和控制增益进行了优化计算。

Based on the fundament of analyses of abroad and our country CNG engine technology, the developing strategy of CNG engine has suggested. Based on the EQD180-20 diesel which the basic construction unchanged, the necessary modified designing for CNG engine was made which included combustion system, intake and exhaust system, cylinder head, piston, and turbocharger.

在分析国内外天然气发动机技术的基础上，提出了满足国3排放的电控喷射单燃料CNG发动机开发方案；以EQD180-20柴油机为基础机型，在基本不改变原机结构的前提下，对燃烧系统、进排气系统、气缸盖、活塞和增压中冷系统进行相应的变型设计；采用稀薄燃烧、增压中冷、低涡流燃烧系统、电控分组点火、开环控制、电控CNG喷射系统和氧化型催化器等技术，降低排放，保持天然气发动机的动力性和经济性。

This invention relates to a circular small UHF antenna with high dielectric constant and its processing method, among which, the UHF antenna characterizes that 1,it is composed of a radiation plate, a feed point and a medium chip, 2, the radiation plate is closely adhered to the top surface of the medium chip, the bottom surface is the metal ground face, the chip and the radiation plate is rectangle or square, 3, the feed point is at the 1/3 place of the diagonal line of the rectangular or square radiation plate apart from the top point.

本发明涉及一种高介电常数圆极化小型超高频天线及其制作方法。UHF天线特征在于(1)所述的超高频天线是由辐射贴片、馈电点和介质基片组成；(2)辐射贴片紧贴在介质基片的上表面，介质基片的下表面为金属接地面；介质基片和辐射贴片呈矩形或正方形；(3)馈电点位于矩形或正方形的辐射贴片的对角线离顶点的1/3处。其制作方法是采用ε≥38高均匀性陶瓷基片，再结合丝网印刷技术完成厚膜焙银后形成辐射贴片，然后再圆极化。具有制作工艺成熟、体积小及使用灵活等特点。

No US-pin plastic treatment therapy, a comprehensive alternative to traditional plastic injection of the United States (with the needle and micro-needle) is efficient, non-invasive and safe,"mesoderm into beauty therapy" is the latest technology of water use and water channel protein electrophoresis principle of development Note the infiltration hole electric technology to non-needle injection principle, the use of "point to a plane," AMD permeation technology in skin electroporation Act under the influence of pulsed current stimulation, so that pores have a physical reaction to the rapid spread in two seconds 650-800 of fine pores, forming an instant electronic delivery channels of nutrition, nutrition Note dialysis therapy immediately with electrophoresis, soft laser stimulation and ice, etc., in the most secure and fast, the skin will be required for nutritional products , 99% transmitted to the basal cells, and can be stored as long as 72 hours, the skin smooth and more compact, creating a perfect Beautiful Skin.

B。电穿孔技术：直接作用于皮肤，瞬间增强皮肤组织的可渗透性。在电击的作用下，细胞的脂质二重层上形成电击孔。在电击孔形成的同时，使得原先无法被细胞吸收的亲水性分子能够穿透并进入细胞内部。电击孔一旦形成，则根据电击的长度，在数秒种至数分钟之内保持打开状态。C。电渗透技术：电渗主要作用于将要分散的物质分子，帮助其顺利穿透并进入肌肤内部，性质相同的电荷相互排斥，因此对正极的营养分子施加正电流，可将营养分子推入皮肤组织。此时，中性分子也一道穿透并进入肌肤内部。

Dynamics theory of ferroelectric polarons, which was developed from the shielding theory of ferroelectricity, is used to explain the polarization switch of ferroelectricity.

在铁电屏蔽理论的基础上发展铁电极化子动力学理论，用来解释铁电体的极化反转现象。

Spin injection make the spin density of the polarons different at the different position in the organic semiconductor.

计算结果表明，极化子电导的自旋相关性是自旋注入引起的，和电流的自旋极化率密切相关；在自旋注入发生后，有机半导体内不同位置上极化子自旋态密度不同，由此产生的极化子电导也不相同，极化子电导是位置的函数。

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，微型温差发电器在微机电系统中的应用前景引起了人们极大的兴趣，电化学沉积方法在制备微米级尺寸的温差电材料方面具有显著的优势，本文对Bi~(3+)和HTeO~(2+)离子的电化学还原过程展开了详细的研究，并尝试了利用电化学沉积方法制备Bi_2Te_3纳米线材料，在温差电材料研究的基础上，对微型温差发电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，以不同的介电系数和微带线结构形成对电磁波的有效引导；(2)利用微带线构成馈电网络可以方便地与辐射缝隙进行匹配；(3)增大缝隙的宽度，并利用馈电微带线的枝节形成双谐振，以增加天线的带宽。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。