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Lasers characteristic as a shock wave drive and the advantages of KrF laser are explained. Finally, the progress at home and abroad is enumerated.In chapter two, the basic principle of the EOS study is introduced. Specially, the impedance mismatch effect of the double-layer flyer is mentioned here. It is the primary theoretical basis of this paper.In chapter three, a one-dimension, three-temperature hydrodynamic code HYADES is introduced briefly. it is used to make a qualitative analysis about how the thickness of ablator affect the flyer velocities and stability.In chapter four, the experimental setup is described.
第一章为绪论部分,简要总结了状态方程研究的历史,激光作为冲击波驱动源的特点和KrF激光的优势,以及国内外的进展情况;第二章是本工作的理论基础,讨论了冲击波物理和雨贡纽曲线测量的基本原理和方法,重点介绍了激光飞片法的特点、关键要素和双层飞片的阻抗失配效应,鉴于KrF激光短波长和长脉宽的特点,我们拟对双层飞片的特性展丌研究工作,为实测状态方程做好准备;第三章简单介绍了一维三温流体力学数值模拟程序Hyades并运用它进行了若干状态方程实验的计算和设计,进行了烧蚀层厚度对飞片速度、稳定性的影响的定性分析;第四章是实验平台描述部分,介绍了光束平滑化技术,靶的制作,条纹相机的原理和使用,系统同步控制以及光学记录速度干涉仪系统的简单原理和构成。
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Laser's characteristic as a shock wave drive and the advantages of KrF laser are explained. Finally, the progress at home and abroad is enumerated.In chapter two, the basic principle of the EOS study is introduced. Specially, the impedance mismatch effect of the double-layer flyer is mentioned here. It is the primary theoretical basis of this paper.In chapter three, a one-dimension, three-temperature hydrodynamic code HYADES is introduced briefly. it is used to make a qualitative analysis about how the thickness of ablator affect the flyer velocities and stability.In chapter four, the experimental setup is described.
第一章为绪论部分,简要总结了状态方程研究的历史,激光作为冲击波驱动源的特点和KrF激光的优势,以及国内外的进展情况;第二章是本工作的理论基础,讨论了冲击波物理和雨贡纽曲线测量的基本原理和方法,重点介绍了激光飞片法的特点、关键要素和双层飞片的阻抗失配效应,鉴于KrF激光短波长和长脉宽的特点,我们拟对双层飞片的特性展丌研究工作,为实测状态方程做好准备;第三章简单介绍了一维三温流体力学数值模拟程序Hyades并运用它进行了若干状态方程实验的计算和设计,进行了烧蚀层厚度对飞片速度、稳定性的影响的定性分析;第四章是实验平台描述部分,介绍了光束平滑化技术,靶的制作,条纹相机的原理和使用,系统同步控制以及光学记录速度干涉仪系统的简单原理和构成。
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It is described in graphical mode, as shown in figure 17, the abscissa stands for time, with space interval 60, unit second; the ordinate represents height, with space interval 50, unit 0.1Km.
用图形方式描述,如图17所示,横坐标是时间,刻度间隔是60,单位为秒;纵坐标是高度,刻度间隔是50,单位为0.1Km。
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A new GIS software company in China as well as its industry backgroud,also the GIS industry competition structure and development status. Furthermore, a study was done on both of its competitive structure and other factors against the external environment and of its strengths, weakness, opportunities, threats and other factors facing the internal environment in this field. Based on this study and the mission and the developing target of the company, established the general developing strategy of the company --- based upon Geospatial information industry, continuing to keep the monopoly status and anabasis GIS industry at the same time.Rely on the photogrammetry technique to build the brand in 3D GIS market to gradually form competition advantage.Take technique development tactic, such as intergrate with other kind of techniques, combine with 3D core techniques and purchase 3rd-technique;take tactic to make products cater to market, such as promote the products service definition, enhance the added-value development ability, improve products management and design, adopt 3rd products,etc;And particuliar marketing tactic,such as service marketing, relationship marketing, difference marketing and brand marketing,etc. At last, point out that should import professional managers to promote company quality and industry competition ability.
本文描述了一个新进入 GIS 领域的软件企业——适普软件有限公司的发展历史及所处行业背景,客观分析了它所处 GIS 行业的竞争结构、发展现状等外部环境,通过深入分析公司所面临的机遇、威胁、优势、劣势等因素后,结合公司的宗旨及整体发展目标确立了公司的总体发展战略——立足空间地理信息领域,维护公司在摄影测量市场的垄断地位,同时进军 GIS 市场,以摄影测量核心技术为依托,在三维 GIS 细分市场创立品牌,并逐步形成竞争优势,同时提出采用多种渠道发展技术、产品全方位适应市场、强化市场营销及市场开发多元化的竞争策略,并其进一步细化为技术开发策略,如与其他信息技术的结合、与真三维核心技术的结合、技术收购策略等;产品策略,如提高产品的服务理念、提高产品二次开发能力、提高产品管理和设计、采用第三方产品开发等;以及市场营销策略,如采用服务营销、关系营销、差异化营销、品牌营销等方式;最后提出公司应该引入职业经理人制度从管理角度全面提升公司质量,提高行业竞争力。
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The tortuosity can be described by bit weight in axial direction and the angle change of drill string bynormal can be considered as the torsion angle of the borehole.
弯曲主要体现为狗腿度,挠曲就体现为井眼的扭转。这种空间挠曲和弯曲特性可以通过测量轴向不受钻压作用的下部钻具组合的变形来描述。
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In an approach that is similar to the progression from problem-based to project-based learning described by Barron et al.
在这种方法类似于从问题的进展为基础,以项目为基础的学习所描述的巴隆等人。
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Results The strain grows well in malt wort agar medium,optimized growing temperature is from18to20℃,basid-iospore,pseudohypha and basidium are its characteristic.The results of carbon source assimilation and sugar fermentation are signifi-cantly distinctive,and in accordance with those described in references.
结果 该菌种在麦芽汁-琼脂培养基上生长良好,适宜温度为(20±2)℃,其生长特性为具有担孢子及假菌丝并有芽孢台;碳源同化试验及糖发酵试验均具有特异性,与参考文献所描述的红发夫酵母形态和生化试验结果基本相吻合。
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In this paper, we discuss the open-region boundary conditions based on Finite Element Method.
本文以有限元方法为基础,以开域边界条件为核心,对电磁场开域问题中的有限元算法做详细描述。
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According to fine oil reservoir describe and various kinds of oil reservoir geological model parameter offered that rebuild, again with leave unit of calculating on unit, estimate Wen15 geological reserves, flow Entrance in the level and vertical distribution characteristic that have each to understand, offer the reliable geological basis for tapping the latent power in further adjustment of the oil field.
依据油藏精细描述及重建的各种油藏地质模型所提供的参数,重新以流动单元为计算单元,估算文15块地质储量,了解各流动单元在平面和纵向上的分布特点,为油田的进一步调整挖潜提供可靠的地质依据。
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Shortly after her death,she underwent what has been described as a"secular canonisation",and became widely depicted in the popular culture of the period.The circumstances of her death were distorted to give the impression that she was an employee willing to die for the sake of her employer''s family,and although very little was known about her life,she was widely cited as arole model.
她死后不长,教会宣布她为俗世圣徒,她的事迹也在当时的主流文化中广为传颂,她在人们的描述中演变为一名甘愿为雇主舍命的员工,只管人们对她的生平所知不多,她被广泛列为榜样人物。
- 推荐网络例句
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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。
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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。
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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