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Abstract: The evolution course of Chinese solid rocket propulsion technology for space missions since 1950s is presented.The technical features,development process,ground tests and flight records of nine typical solid motors are described.These motors wer
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文摘:叙述了20世纪50年代以来中国航天固体火箭推进技术的发展历程,介绍了9种最具代表性的固体火箭发动机的技术特征、研制过程、地面试验和飞行情况,这些发动机分别应用于中国的探空火箭、运载火箭上面级和应用卫星变轨系统.文中还简要地评述了中国固体推进各单项技术的发展水平. |
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Abstract: The exhausting of resources and the deteriorating of env ironment are common in old industry bases.Science and Techology have been widely applied to traditional industrial structure in Anshan.On the other hand,the ste ps of adjusting industral s
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文摘:老工业基地普遍存在着资源枯竭，环境污染严重的问题.为此，鞍山市在传统产业中加大科技投入，实行二次能源的综合利用，加快产业结构的调整步伐，即在三次产业结构中突出发展绿色产业，以实现老工业基地的可持续发展，从而取得初步成效. |
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Abstract: The experience of dealing with of biomaterial with microwave digest method was summairzed.Several rapid,accurate,convenient methods for treating biomaterial in the determination of trace elements were provided.
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文摘:总结了利用微波消化法处理生物材料的工作经验，为微量元素测定中的生物材料处理提供了几种快速、准确、方便的方法。 |
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Abstract: The experiment about ignition property of solid e nergetic materials was done by laser which was generated by big powerful laser i nstrument-ND:YAG.The influence on the ignition property of difference enery,puls e width and different frequency o
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文摘:使用大功率Nd:YAG激光器产生的激光，对固体含能材料的激光点火性能进行了实验研究，分析了不同能量、脉冲宽度、调制频率及药粒尺寸等因素对点火特性的影响，为激光点传火系统的研制提供了实验依据。 |
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Abstract: The experiment mechanism of strata around roadways is analyzed with the procedure simulation of resemble,combined with the deformation characteristics of roadway in coal mine.The resemble simulation experiment on procedure for the failure of sof
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文摘:对模拟实验原理进行了阐述，结合现场实际破坏特征，对软弱层状岩石巷道的破坏过程进行了相似模拟实验，根据试验结果和计算机仿真结果，对其破坏过程进行了分析，对现场施工具有指导意义. |
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Abstract: The experiment results of anisotropy of brass H68 mechanicalproperties in ironing are introduced in this paper. It is ironing coefficient to influence anisotropy of mechanical properties.
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文摘:列出了在变薄拉伸过程中形成H68黄铜毛坯的机械性能各向异性的实验研究结果。指出了主要影响机械性能各向异性变化的是变薄系数。 |
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Abstract: The experimental design plans were determined on analyzing main factors to affect infiltration capability of muddy water.
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文摘:在分析了影响浑水入渗主要因素的基础上，提出了试验方案。 |
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Abstract: The factors that affect the city planning have many, the article thinks that the nature factor shoulds be more to rises in city planning predominant function.
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摘要:：影响城市规划的因素有许多,文章认为自然因素应该更多的在城市规划中起到主导作用。 |
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Abstract: The false preset of pragmatics is a kind of language phenomenon that process the messages outside of the common field of knowledge shared by the two communicating parties as the preset information.
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摘要：虚假语用预设是一种把非言语交际双方知识共有场中的信息处理为预设信息的语言现象。 |
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Abstract: The far-field spot characteristics of laser converted by random phase plate are analyzed theoretically,including the shape,size,rotational symmetry and diffractive efficiency of the spots,as well as the distribution of subsidiary spot.By compari
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文摘:从理论上分析了激光经随机位相板变换后在远场的光斑特性(包括光斑的形状、大小、旋转对称性、衍射效率以及旁瓣分布)，通过比较三种形状位相元(等边三角形、正方形和正六边形)的远场光斑特性，得知正六边形位相元结构的随机位相板更适合于激光聚变中的束匀化。 |
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Abstract: The fast Hankel transformation algorithm is used to study the diffractive modulation property of laser beam propagation in high power laser facility.
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文摘:利用快速汉克尔变换算法研究了高功率激光在自由空间传输过程中形成低频调制的规律，给出了衍射调制深度与光束宽度及传输距离等参数之间的变化关系。 |
