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This paper describes the basic principle of velocity pursuit guidance law and body pursuit guidance law of trajectory correction projectiles , researches the terminal correction trajectory and miss distance under pursuit guidance laws by 6—DOF trajectory simulation program, researches the orbit of laser detector ray axis and ground projection area of laser detector spatial viewpoint.

文中对速度追踪制导律和弹体追踪制导律的工作原理进行了研究，利用六自由度弹道仿真程序对弹道修正弹两种追踪方式下的末段修正弹道和脱靶量进行了对比计算，研究了两种追踪方式下激光探测器光轴的轨迹及激光探测器空间视场在地面投影区域的变化；弹体追踪方式命中精度虽然较低，但由于工程实现简单、成本低，仍有其工程使用价值。

In clover lands, there is decreasing soil organic matter and other nutrients, and soil physical properties are better with lower salinity due to less human disturbance. On other hand, azotobacter of legume increases the available nitrogen content in surface soil.

苜蓿地由于管理粗放，对土壤扰动少，容重较低，孔隙度和毛管孔隙度较高，盐碱度较低；每年对苜蓿的采收显著降低了苜蓿地土壤有机质和养分含量，而豆科固氮菌的存在，使表层速效氮含量较高。

Low backlash, low noise and high reliability are the main characteristics of Tandler Products.

低齿隙、低噪音和高可靠性是Tandler产品的主要特点。

The results were as follows.(1) In the backward handspring, the trajectory of CM and horizontal velocity of CM in junior-high and college gymnasts were lower and higher than those of senior-high gymnast, so the vertical velocity is better when they perform tucked backward somersault. College gymnast has higher vertical velocity than junior-high and senior-high gymnasts in take-off moment of backward handspring phase.(2) Senior-high and college gymnasts have more elbow and shoulder angle in take-off moment of backward handspring and tucked backward somersault phase. Therefore, angle of both arm is bigger for performing in hand push away phase in the backward handspring, and increased the reaction force with body in the tucked backward handspring.(3) College gymnast has large knee flexions in hand support and push away moment in the backward handspring, it would increase rotation radius and better moments of inertia in the backward handspring.

结果显示：在后手翻阶段中，较低的重心轨迹和较高的水平速，有於后续空翻的垂直速；大专选手在后手翻阶段起跳瞬间有较高的垂直速；高中及大专选手在后手翻起跳脚地瞬间和团身后空翻起跳脚地瞬间时，肘、肩关节角皆大於国中选手，使其在后手翻起跳地瞬间时，双臂的伸展於后手翻的手推地面的动作，而团身后空翻起跳脚地时，双臂向上摆於身体向上伸展方向的掌握，并使重心有一定的腾空高；大专选手在后手翻阶段的手著地瞬间和手地瞬间的膝关节角较大於高中和国中选手，使其可增加身体的旋转半径，并能获得较佳的下摆动能，而膝关节角小则形成屈膝的动作，导致重心水平速低，减少下摆动能和影响整体动作的节奏和韵。

In order to avoid the cumbersome design,the bandpass filter is indierect designed by relationship between it and lowpass filter.

摘 要：为了避开直接设计带通滤波器的繁琐设计步骤要求，利用低通滤波器与带通滤波器的关系，间接设计带通滤波器是创新之处，即通过设计简单的低通滤波器从而达到设计带通滤波器的要求。

Absrtact: After analyzing market of body 2building industry in five provinces of northwestern China by using theory of industrial orga2 nization ,the conclusion as follows : In recent years the healthy body club quantity rose quickly , the club management scale gradually expands , the industrial market capacity increases causes northwest five provinces sports healthy body industry market concentration ratio to belong to the low market concentration ratio ; I ts product di fference low; The club enters/ withdraws from the market the bar2 rier to be bigger.

摘 要：采用产业组织理论对西北五省体育健身产业市场进行分析。近年来健身俱乐部数量上升快、俱乐部经营规模逐渐扩大、产业市场容量增大致使西北五省体育健身产业市场集中度属于低市场集中度；其产品差别度低；俱乐部进入/退出市场的壁垒较大。

I have eight main products plant water barium hydroxide, a water barium hydroxide powder, a crystal water barium hydroxide, barium borate partial, thiourea, barium carbonate, barium chloride, barium nitrate, after I plant refined products up to no chlorine, no sodium, low Sr, low iron.

我厂主要产品有八水氢氧化钡、粉体一水氢氧化钡、晶体一水氢氧化钡、偏硼酸钡、硫脲、碳酸钡、氯化钡、硝酸钡等，经过我厂精制的产品可达无氯、无钠、低锶、极低铁。

After the water-based clean, the low K dielectric layer is formed on the surface of the barrier layer to achieve the composite layer that has a low K.

在以水为基础者清理之后，低的 K 电介体层在障碍层的表面上被形成达成有低的 K 的含有种种要素的层。

The determined thermal conductivity values vary from 0882 to 678 W/m?K and the calculated heat flow values in Jianghan Basin range from 419 to 609 mW/m2,with a average of 523 mW/m2.It shows that the influence of tectonothermal event before Cenozoic in Jianghan Basin has faded away,and the basin has cooled down.

结果显示江汉盆地热流419～609 mW/m2，平均523 mW/m2，盆地总体表现为较低的大地热流，反映了中新生代以来构造活动逐渐减弱，盆地不断冷却的结果；从盆地内热流分布看，热流分布南高北低，反映了江汉盆地构造活动的不均一性。

At present, basing on network and computer applications, more and more enterprises realize digital product development.

目前，尽管越来越多的企业实现了企业内部基于网络和计算机应用系统的数字化产品开发，但低水平的产品开发过程管理以及低效率的企业间产品数据交换。。。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。