|
Abstract: The concept, absolute utilization rate of approach speed in long jump refers to the ratio of the athlete's horizontal speed of CG at the moment of taking off to his/her absolute speed in running.
|
|
|
文摘:“跳远助跑速度绝对利用率”是指：运动员踏板瞬间人体重心水平速度与运动员平跑中人体重心最高水平速度（绝对速度）的比值。 |
|
Abstract: The condensation heat-exchange characteristic of a separate-type heat-pipe was studied on a 1:1 model.The heat pipe is heated by electricity,and working fluid is distilled water,and it is cooled by air.The experimental results show that,(1)when
|
|
|
文摘:建立了空气冷却实验台，热管的加热方式为电加热，工质为蒸馏水.在1∶1模型上对分离式热管管内凝结换热特性、不凝性气体对凝结换热的影响及不凝性气体的扩散规律进行了试验，得出分离式热管有一最佳充液率，其值为45%左右；凝结换热系数随着蒸汽压力的增加略有降低，在实验的压力范围内，降低了9.5%；不凝性气体对分离式热管的凝结换热仅影响冷凝段下部较小部分，通过排气阀排出不凝性气体可有效地改善冷凝段下部的凝结换热；随着压力的增加，不凝性气体对分离式热管冷凝段的影响减少.这些结论可用于分离式热管换热器的工程设计和控 |
|
Abstract: The condition of wavelength stability of laser under harmonic vibration ω=1 is analyzed in this paper.
|
|
|
文摘:本文分析了在ω=1的谐振动调制外场条件下，激光器输出波长的稳定性条件。 |
|
Abstract: The conformal flat space-time solutions in electromagnetic and scalar theory are shown,and the indefiniteness of the plane-symmetric solutions and the method for defining a noncontinuous field by the intersection of multi-solutions are demonstra
|
|
|
文摘:给出电磁场和标量场在共形平直时空中的解,发现了平面对称解的不确定性及由多重解的交集来定义一个非连续场的方法. |
|
Abstract: The constitution,process principle and parameters of a continuous desulphurization system used to desulphurize the base iron for nodular iron was introduced.The characteristics of the system and its operation instruction was explained.
|
|
|
文摘:介绍了一种炉外球铁原铁液连续脱硫系统的组成、工艺原理及有关参数，说明了该系统的使用方法及特点。 |
|
Abstract: The construction of the liquid angular sensor in the laser beacon is designed , the work principle and magnify circuit are analysed .
|
|
|
文摘:对激光基准信标仪中所采用的液体摆角传感器的结构进行设计，分析其工作原理、放大电路。 |
|
Abstract: The consumption of luxury brand by Chinese consumers is increasing rapidly not only domestically, but also abroad.
|
|
|
摘要：中国奢侈品的消费正在快速增长，不仅在国内，而且在海外大量购买。 |
|
Abstract: The content of Fe,Zn,Cu,Mn,Ca,Mg,Na,K and Pb in the hair of 120 normal children in a kindergarten in Changchun was determined by AAS.
|
|
|
文摘:用原子吸收光谱法测定了长春市某幼儿园120名正常儿童头发中铁、锌、铜、锰、钙、镁、钠、钾、铅九种元素含量。 |
|
Abstract: The continually increase in digitized information resour ces such as disc publications and on-line databases,which put forward new task s for the collection construction of library,requires that the libraries of coll eges and universities shoud
|
|
|
文摘:光盘出版物、联机数据库等数字化信息资源的不断增长，给图书馆的馆藏建设提出了新的任务.这就要求高校图书馆必须重新制定馆藏采购标准，适当加大数字化信息资源的投入比例，并在新的采购标准指导下，不断优化本地馆藏，充分利用计算机网络上的虚拟馆藏，同时做好网络时代图书馆的重要馆藏资源——网址及数字化出版物的收集与管理工作. |
|
Abstract: The contrast experimental trials of three refining processes are car ried out for ladle bottom bubbling with nitrogen,nitrogen-argon or argon .The results show that the nitrogen content in steel has an important influence on the stretchability o
|
|
|
文摘:进行了钢包底吹氮、底吹氮-氩和底吹氩三种精炼工艺对比试验，结果显示，钢中对钢丝拉拔性能影响显著。 |
|
Abstract: The control reconfigurable aircraft with multi-surfaces needs robust basic flight control system to support enough time for failure detection and isolation.When partial surface loses,it can keep the damaged aircraft stable.In this paper,multivar
|
|
|
文摘:控制可重构飞机要求其基本飞行控制系统对舵面部分缺损故障具有强的鲁棒特性，在故障发生后保证飞机的稳定性，提供足够的时间进行故障的检测和隔离，为控制系统重构提供条件.本文采用高速采样PI控制器设计输出反馈跟随系统，给出了控制器的设计方法，并分析了它对于控制舵面部分缺损故障的鲁棒特性.仿真结果表明，这种控制器具有好的鲁棒特性. |
