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With the help of item funds including the experimentation technology of the total accouterments department and the martial research and Ordnance Engineering College's fund, a series of research work have been finished, which is about the high power laser damage to optical material, optical elements, optoelectronic sensors and optoelectronic system.

本论文在总装试验技术项目、军队科研项目和解放军军械工程学院重点基金等的资助下,开展了强激光对光学材料、光学元器件、光电探测器件和光电系统的干扰、破坏以及强激光防护技术的研究工作。

Regarding anisotropic material (including orthogonal aeolotropy) crack expansion question analysis and research, the people although have done the massive research work, but accumulates data is actually limited.

对于各向异性介质中裂纹扩展问题的分析和研究,人们虽已做过大量的研究工作,但所积累的资料却十分有限。

To give the definition of the mass concrete and to concrete\'s cracks together with practical meanings of control ,and give a brief review on the research in the field at home and abroad, at last, methods to control temperature crack of the mass concrete from several aspects such as design measures,concrets material, construction schedules.etc are summed up; To explain the physical mechanics of the concrete and computing methods-Difference Method and Finite Element Method, and illustrate the application of their specific methods repectively;Several temperature factors that can influence the temperature stress of mass concrete baseplate are analyzed. The influence degree of temperature factor can be got through the ANSYS simulation computation the control of temperature can control the temperature stress, consequently control the temperature crack of mass concert baseplate; through the influence of the crack resistance ability of mass concrete baseplate which takes the reinforcement as a part is analyzed. By ANSYS simulation, the best suited volume ratio of reinforcement is found out, at same time the layout of reinforcement with the same volume ratio can also affect the resistance ability of mass concrete baseplate. Sum up of above analysis, anti-crack function of steel bar in early mass concrete baseplate is obvious, so it\'s necessary to consider beneficial effect of construction steel bar in research of temperature control on mass concrete baseplate.

本文先容了大体积混凝土及混凝土裂缝的基本概念,对国内外在这个领域里的研究现状作了扼要叙述,并从结构设计、混凝土材质、施工措施等方面总结了大体积混凝土温度裂缝控制的方法及防止措施;阐述了混凝土的基本物理力学性能,总结了大体积混凝土温度计算的方法——差分法和有限元法,并分别举例说明其具体应用的方法;分析了影响大体积混凝土底板温度应力的几种温度因素,利用ANSYS模拟计算,得出了每种因素的影响程度,通过分析提出了在这几种温度影响因素下如何通过控制温度以达到控制温度应力从而来控制裂缝的具体建议;针对大体积混凝土基础底板中配筋的不同对混凝土底板抗裂能力的影响不同,利用ANSYS进行模拟分析,得出底板中最合适的体积配筋率,同时分析了在相同体积配筋率下钢筋的具体布置对大体积混凝土基础底板抗裂能力的影响,分析表明,配置钢筋对混凝土结构的开裂阻止作用明显,在研究大体积混凝土温度裂缝题目时,要考虑钢筋在其中的有利作用。

Taking as research method, field work as "the special skill" of the ethnology, also no doubt is the important research method of this article. Gaining the first material through different forms of visiting, talking,investigation and so on, has made the historical materials and field work double win. The historical literature is the direct foundation of tracing the nationality source and studying with textual. The history data of local chronicle, history book, genealogy, genealogy, etc. can make field date and literature date bring out the best in each other.

从研究方法而言,田野调查作为民族学的"看家本领",无疑也是本文的重要研究方法,通过访谈、调查、走访等不同形式获取的第一手资料奠定了材料和立论的可信度;历史文献是追溯族源、考究历史的直接依据,地方志、史书、(来源:A4acaBC论文网www.abclunwen.com)族谱、家乘等史料使得田野资料和文献资料相得益彰;对白族的任何研究,如果脱离它与大理白族的联系孤立开展,将带有很大的局限性,因此联系的观点和比较的方法也是本文的重要方法。

One is research on choice and optimization of clapboard material s of split columns, the other is research on technique of construction of split columns.

从两个方面对改善短柱特别是超短柱抗震性能的分体柱技术进行了进一步的试验研究,一是分体柱的隔板材料选择和优化的试验研究,二是分体柱施工工艺的试验研究。

Vibration control of structures using SMA material is one of important research direction which is well-shown applicable value of this advanced material.

开状记忆合金是一类应用前景广阔的智能材料系统,利用形状记忆合金材料控制结构振动是最能体现这种先进材料应用价值的重要研究方向之一。

Silver vanadium oxide cathode material has been widely used in implantable cardiac defibrillator power system,and is a cathode material of high value in research and development.

钒酸银正极材料目前已广泛应用于可植入式心脏复律除颤器电源中,是一种极具研究和开发价值的电极材料。

In this research, tungsten trioxide as a photochromic material had been synthesized and WO3/PAA hybrid films were prepared by blending method. UV light was employed as the energy source for the photochromic reaction of the material in order to perform the NIR absorption.

中文摘要本研究成功制备三氧化钨光致变色材料,利用有机无机混掺法将三氧化钨与聚丙烯酸混掺成膜,藉由紫外光作为变色反应的驱动力,达到吸收近红外光效果。

This research gives an introduction to the basic properties of pbospbogypsum and its treatment way; the influence factors of phosphogypsum self-leveling material properties such as different additives and material mix proportion and etc were studied.

本研究介绍磷石膏的基本性质以及处理过程;研究不同晶形转化剂处理的磷石膏配制自流平材料时,对其性能的影响;并且研究了自流平材料的组成对其性能的影响和自流平材料的微观结构。

Disadvantage of this device is high voltage, in order to reduce the operating voltage to achieve the purpose of actual use, screening of high dielectric constant material as the dielectric layer material is topic of future research.

缺点是工作电压偏高,需要进一步筛选出介电系数高的物质来作为介电绝缘层材料,以便降低工作电压,达到实际可以使用的目的。

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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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力