查询词典 central element

The lens axicon is based on the use of the spherical aberration of the mirror surfaces,which is inexpensive and easy to manufacture into a element with large apertures as compared with diffractive axicons,refractive cone axicons,and earlier lens axicons with aspheric surfaces;the opaque disk can offer the Bessel beams with long non-diffracting distances,and the diameter of the central peak is adjusted by choosing the focal length of the collimating lens;the tunable fluidic conical lens is a new device for generating Bessel beams,which can obtain the Bessel beams with different parameters by varying the refractive indexes of the solution which is filled in the device.

双透镜轴棱锥法主要基于透镜球面像差的运用，与衍射轴棱锥、折射轴棱锥和早期的非球面轴棱锥相比，具有加工简单、便宜，易于制作大尺寸的特点；不透明障碍物法得到的贝塞尔光束具有很长的无衍射距离，其直径可通过选择不同焦距的准直透镜来得到调节；可调流体轴棱锥是一种产生贝塞尔光束的新型器件，它可以很容易地通过改变注入器件的液体的折射率来得到不同参量的贝塞尔光束。

The second scheme shows super-approximation for flux function at central point of element as grids ate orthogonal.

在正交网格下，第二种格式对流函数在单元中心点的值还具有超逼近性。

When the lock ring simultaneously with the question cone gear engagement ring gear, cone after contact friction moment in the role of the rapid speed of gear to reduce to synchronize with the speed equivalent to lock ring, the two synchronous rotation, relative to gear Central lock synchronization speed is zero, thus inertia torque also disappeared, then in force under the impetus of engagement sets unhindered and synchronization lock Gear engagement ring, and further engagement with the question of gear engagement ring gear and completed Shift process The topics mainly through the Pro / E synchronization software for the car to three-dimensional modeling structural design, and through the parameters of the design process to achieve its structure, and on this basis, the use of ANSYS FEM software structure of the typical synchronization And a finite element analysis, through structural analysis of its structural design is reasonable to assess and make recommendations to improve the design

当同步锁环内锥面与待接合齿轮齿圈外锥面接触后，在摩擦力矩的作用下齿轮转速迅速降低到与同步锁环转速相等，两者同步旋转，齿轮相对于同步锁环的转速为零，因而惯性力矩也同时消失，这时在作用力的推动下，接合套不受阻碍地与同步锁环齿圈接合，并进一步与待接合齿轮的齿圈接合而完成换档过程本课题主要是通过Pro/E软件对汽车同步器进行三维造型结构设计，并通过参数化实现其结构设计程序化，在此基础上，利用ANSYS有限元软件对典型同步器结构进行有限元计算与分析，通过结构分析对其结构设计的合理性作出评价并提出改进设计建议

In vitro killing effect of adenovirus - mediated herpes simplex virus thymi- dine kinase gene under regulation of hypoxic response element on hepatoma cell line HepG2WANG Xiao - zhong, PENG Qi - quan, PENG Yun - heng, LIAO Wen - peng Department of Hepatobiliary Surgery, Central Hospital of Shantou City, Shantou 515031, China.

王小忠 彭启全彭云恒廖文鹏广东省汕头市中心医院肝胆外科，广东汕头515031摘要：目的：构建携带受低氧反应元件调控的单纯疱疹病毒胸苷激酶基因的重组腺病毒载体，探讨该重组腺病毒对体外培养的肝癌细胞HepG2的特异性杀伤活性。

By using explicit central difference algorithm and finite element software ANSYS/LS-DYNA, the numerical simulation of involute spline shaft's cold-rolling forming was realized.

利用显式中心差分算法，借助有限元分析软件ANSYS/LS-DYNA，通过数值模拟，实现了花键冷滚轧成形过程的可视化。

Phosphorus is an element that has been central to the development of our modern way of life.

磷是我们的现代生活模式的发展重点的一种元素。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了