查询词典 Ball

The mechanics model of a ball screw was developed considering the factor of lead angle,and the main curvature of the helical surface was deduced using differential geometry method,and the effect of lead angle on the elastic deformation was analyzed.

考虑螺旋升角的因素，建立了滚珠丝杠副的受力模型，应用微分几何理论推导了螺旋面的主曲率，并进一步分析了螺旋升角对滚珠丝杠副弹性变形的影响。

A measurement pool is made by hanging a pair of nitrogen-filled small glass balls in non-homogenous magnetic field. The angle signal of the dumbbell ball torsion is magnified using light lever. In order to enhance the sensitivity and accuracy, CCD is used to probe the light signal spot. According to the magnetic susceptibilities of NO and NO2, the influences of these two gases on the analyzer are analyzed, and the application environment for the oxygen detector is discussed.

通过在非均匀磁场悬挂一对充氮玻璃小球构成测量池；采用光杠杆对哑铃球扭转的角度信号进行放大，由CCD对光点位置信号进行探测，以提高分析仪灵敏度和精度；由NO、NO2的磁化率特性分析这两种气体对分析仪的影响，说明测氧仪的应用环境。

Whether it was a flat ball down the line or a heavy topspin angle shot, I was able to go after each shot with confidence because of the control I was getting.

无论是要打出平击的底线球还是强烈旋转的大角度的回球，我都能自信的击出，因为它的控制是如此的惊人。

As a tennis player you face the reality of a ball angling away from you.

作为网球选手，你要面对这样的事实，球以角度飞离你。

The mechanism is composed of two ball screws, U-type linear rails, linear bearings and flexible couplings. The permanent magnetic direct current motors are used as actuators. The rotary encoder is used to measure the angular position of the DC motor. The digital controller is implemented on the personal computer and a motion control card (EPCIO-6000). The objective of this thesis is to realize precise positioning control using a real-time motion control system on an X-Y table.

机械结构包括有滚珠导螺杆、U型线性滑轨组、线性轴承及可挠性连轴器等；致动器是采用永磁式直流马达(permanent magnetic direct current motor)；感测器是使用光学式旋转型编码器来量测马达旋转的角度；控制器则是以个人电脑为控制核心，搭配运动控制轴卡(EPCIO-6000)所组成。

Small annulet ball , natural resources is limited .

小小环球，资源有限。

We want to buy Ball, Gate and Check Valves, 2 To 42 Ansi Class 150 To 2500 Valves

我们要采购球，门和止回阀

After many swings he destroyed the whole anthill, but still had not hit the ball.

挥了很多杆以后，他摧毁了蚁堆，可仍然没打到球。

After all the practice and anticipation, Friday has arrived and it's time to play ball.

在所有的准备之后，终于到了周五，动真格的时候到了。

Speed of speed of revolution of base area ball and be in on revolution orbit when rate of positional world revolution is rapidder, earthly revolution arrives perihelion, for at the beginning of January (the summer austral boreal winter) when rate of; world revolution is slower, earthly revolution arrives aphelion, for at the beginning of July of boreal Xia Nadong.

根据地球公转速度快慢及在公转轨道上位置地球公转速度较快时，地球公转到近日点，为1月初；地球公转速度较慢时，地球公转到远日点，为7月初。

This paper analyzes the compound attractor structure of a new three-dimensional autonomous chaotic system.

分析了一种新的三维自治混沌系统吸引子的复合结构。

ON shut rivals out of their transmission systems and shy away from reinvesting their profits in network improvements.

ON将竞争者挡在了其输送体系之后，并不愿将其收益再投资于网络改建工作。