查询词典 back pressure

There is a small action range in archery.Simple methods and analysis is inadequate,so the author,on the basis of testing the archery athletes in national team with the Qualisisy infrared photoelectric testing system,Footscan sole pressure testing system,Noraxon myoelectricity remote testing system, etc,analyzes comprehensively the action technique of the athletes in national team from the posture,body motion characteristics,body posture equilibrium and stability,distribution of centre sole pressure, myoelectricity characteristics,etc,with the methods of relative software and data statistics.The conclusions and the suggestions are as follows:Conclusion:Firstly,the communality of posture angle,muscle strength,the activation order of main muscle during raising the bow, raising the bow and the timing of the raising could be used as the evaluation index of technique action in archery;Secondly,the length of the time needed in the different periods couldn\'t be used as technique evaluation index since it has no relation with the result.But the time of raising and pulling back the row is relatively fixed,and the time has a positive relation with the archery achievement of the national team in China.Thirdly,the central index of the sole pressure could be used as the reference criterion of selecting athletes and forecasting achievement.During playing archery,the interrelation between the central index of the sole pressure and the achievement is different individually and in different periods.Fourthly,there is low stability of the archery athletes in the front and back direction during the action, caused by the athletes\' posture disequilibrium of dorsal abdominal muscle and non-professional sport shoes..Fifthly,kinematics and electromyography shows that the people on archery in China haven\'t taken the raising and pulling back the row seriously.

射箭的肢体动作幅度小，简单的手段和分析不能满足其需要，笔者结合各种运动生物力学仪器优点及射箭项目的特性，选用Qualisisy红外光点测试系统、Footscan足底压力测试系统、Noraxon肌电遥测系统等对国家队射箭队运动员进行多方位的测试，运用相关软件及数理统计方法，对运动员的射箭动作技术，从射箭动作的姿态构架、肢体运动特点，身体姿态平衡稳定性、足底压力中心分布、肌电特性等进行全面分析，结论及建议如下：结论：第一，姿态角、肌肉用力激活程度、举弓阶段主要用力肌肉激活顺序、举弓、开弓时间等的一致性可作为射箭技术动作评价指标；第二，各动作阶段所用时间的长短不能作为技术评价指标，但举、开弓的时间相对较固定，开举弓时间比与中国国家队射箭成绩正弱相关达到显著性；第三，闭眼状态下足底压力中心单位面积轨迹长与144支箭最好成绩正相关达到显著性，可作为身体素质、选材及成绩预测的参考依据；实射时身体平衡的足底压力中心指标与成绩的相关程度具有个体性差异、阶段性差异；第四，射箭运动员实射时身体在前后方向上的稳定性较差，这与运动员的站立姿态、腹背肌力量的不匹配以及射箭没有专业运动鞋有关；第五，运动学及肌电学都表明中国射箭训练对举弓、开弓阶段的重视不够，背部肌肉用力特征不明显，撒放技术合理性不高。

High Back Pressure Vacuum Breaker Flush Connection , Spud Coupling and Flange for 1 1/4 Top Spud

回路高压真空断路阀冲水连结装置，进水口连结和用于1 1/4英寸上部进水口的法兰。

"High Back Pressure Vacuum Breaker Flush Connection with One-Piece Bottom Hex Coupling Nut, Spud Coupling and Flange for 1 1/2"Top Spud

回路高压真空断路阀冲水连结装置，带一体化底部六角连结螺母，进水口连结和用于1 1/2英寸上部进水口的法兰。

Undercooling is small, steam leakage rate of less than 3%, the maximum back-pressure rate of 75%, connectors are more sensitive than the free float steam trap.

过冷度小，漏汽率小于3%，最大背压率为75%，连接件比较多，灵敏度不如自由浮球式疏水阀。

PLUG VALVES Undercooling is small, steam leakage rate of less than 3%, the maximum back-pressure rate of 75%, connectors are more sensitive than the free float steam trap.

过冷度小，漏汽率小于3%，最大背压率为75%，连接件比较多，灵敏度不如浮球式疏水阀。

PLUG VALVES Undercooling is small steam leakage rate of less than 3% the maximum back-pressure rate of 75% connectors are more sensitive than the free float steam trap.

过冷度小，漏汽率小于3%，最大背压率为75%，连接件比较多，敏捷度不如浮球(_lian jie jian bi jiao duo _ling min du bu ru fu qiu)式疏水阀。

Thus the working mechanism of the rigid foundation has been demonstrated. The back pressure varies much at initial stage, which largens in corner point area and lessens in center area.

刚性基础在荷载作用下，计算区域基底反力在加荷初期变化比较大，角点区域反力变大，中心区域反力变小，随着时间的增长，反力逐渐趋于稳定。

Both back pressure turbines and reducers can be used in steam using system to provide steam of different pressures.

背压汽轮机和减温减压器都可以用于用汽系统，提供不同等级的蒸汽。

The effect of back pressure on the weight precision in injection molding was investigated via experiments of injecting to air.

通过对空注射方式对影响精密制品质量重复精度之一的背压进行实验和理论研究。

Obstruction is one of the most important abnormalities of the urinary tract, since it eventually leads to decompensation of the muscular conduits and reservoirs, back pressure, and atrophy of renal parenchyma.

梗阻是泌尿道最重要的异常之一，因其最终使肌性管道及其容器失去代偿能力，发生反压及肾实质萎缩。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。