速度

Three kinds of cutting material were selected to machine stainless steel machining experiment such as ceramic cutting tools, cermets cutting tools and coated carbide cutting tools, in which the best range of each kind of tool material was founded. For example, LT55 was suitable to be machine lCrl8Ni9Ti as the cutting speed surpasses 120m/min and have a good wearable property.(3) Surface roughness was measured under different cutting conditions. Feed rate played the most important role in impacting surface roughness, and then cutting speed.(4) Chip patterns in different cutting speed with various cutting materials were analyzed. With the increase of turning speed, chip became shorter and was easy to be broken. For instance, serration chip appeared in high sped turning stainless steel with LT55;(5) Work hardening of austenitic stainless steel was analyzed.

陶瓷刀具LT55适合在Vc=120m/min以上切削加工不锈钢，耐磨性好；③通过试验研究了不同刀具材料高速车削加工1Cr18Ni9Ti不锈钢时的表面粗糙度，其中进给量对表面粗糙度的影响最为显著，其次为切削速度；④分析了不同刀具材料在不同切削速度下加工1Cr18Ni9Ti不锈钢的切屑形态，随着车削速度的提高，切屑变短且易断屑，其中LT55陶瓷刀具切削加工时产生了锯齿状切屑；⑤分析了奥氏体不锈钢的加工硬化机理及其对刀具磨损的影响；⑥根据试验结果分析在不同切削条件下切削不锈钢的刀具磨损形式及其磨损机理。

The effect from transverse webs and frames and the effect from collision velocity on ship bow collision properties are also studied in this paper. 7. The idea of buffer bow is put forward from aspects of the overall situation of environmental protection and reducing the damage of struck shipside caused by striking bow. The influence of curvature of bow shape on mode of distortion, collision force, collision force density and energy absorption of bulbous bow is described detailedly through a series of collision numerical simulation for bulbous bows that have different curvature.

发现横向框架对于船艏结构的变形形态，碰撞力及能量吸收都有一定的影响，在进行碰撞分析时不能忽略，在较低的速度范围内碰撞速度对碰撞力及能量吸收没有太大影响，所以可以从较高速度撞击后得到的能量吸收曲线中得到较低速的碰撞能量吸收曲线，从而可以得到低速碰撞时的撞深，然后通过这个撞深在较高速碰撞的碰撞力曲线中可以获得低速碰撞的碰撞力曲线。

After comparing with previously report, conclusion was as follow: when players use take-off spike movement by single-foot, the strides should increase progressively after observing the ball's direction, and raise the height of jump by getting faster horizontal and vertical velocity of body gravity. In order to avoid increasing the time of take-off, the body gravity is inadvisable to drop so much. In air motion period, player's movement of arm swing will influences the time of spike, if we emphasize the quick offensive, it should reduce the movement of arm swing to decrease the time of spike. When spiking, the joint of elbow should flex by a little range to make forearm powerful.

经由本实验结果与过去研究比较后得到以下结论：选手在执行单脚起跳扣球动作时，助跑的步幅宜在观察球的动向后，采取递增的方式助跑，并加快身体重心水平速度及垂直速度，以提高起跳高度；起跳期起跳脚踏入瞬间身体重心不宜大幅度的下降，以避免增加起跳所花费的时间，影响扣球的节奏及战术的执行；空中动作期时，选手的挥臂动作会影响击球时间，若要强调快速的进攻节奏，宜减少扣球的挥臂动作，以降低完成扣球所需的时间；而击球瞬间肘关节宜保持小幅度的弯曲，以发挥前臂的力量和速度。

The environmental laboratory has 1,110 m 2 , in the possession of 20 advanced test equipments that both from China and other countries such as USA , France , Italy , Japan , etc. The speed of decreasing temperature could reach 15 ℃/min, the raising speed of temperature could reach 30 ℃/min and be capable of adjustment continuously. 29 m 3 test box could test temperature, temperature and humidity for large electrician and electronic equipment. The speed of raising temperature could reach 6 ℃/min at best. Vibration test equipment include slipway, it could carry through three axis vibration, and the minimum thrust force is 5 tons.

环境实验室建筑面积 1100 平方米，拥有从美国、法国、意大利、日本等国家引进的国外及国产先进试验测试设备 20 台，降温速度最高可达到 15 ℃/min ，升温速度可达 30 ℃/min且连续可调； 29 立方试验箱能对大型电工电子设备进行温度、温度循环及湿度试验，升温速度最高可达 6 ℃/min ；振动试验设备有滑台，可进行三轴向振动，最大推力可达 5 吨。

Fujian region exhibits a consistent southeastward movement: the average velocity before the earthquake was 32.1 mm/a; the velocity during the earthquake and in the two years after the earthquake t...

福建地区存在一致的南东向运动地震前(第1时段)运动速度平均为32.1mm/a；震时和震后两年时间内(第2时段)运动速度大幅度增加到38.7mm/a；震后第2个两年(第3时段)运动速度相对于第2时段大幅度减小为30.0mm/a；震后第3个两年(第4时段)，运动速率相对第3时段有较大增加并超过了第1时段。

Of, relating to, or capable of speed equal to or exceeding five times the speed of sound .

超波音速的等于或超过音速五倍的速度的，与这种速度有关的，或能达到这速度的

In order to promote the development of speed roller skating smoothly and orderly in our country, and improve the competitive level of our country, we should study the affecting factors for the development of speed roller skating of our country.

为了更好地推动速度轮滑运动在我国稳步而有序地发展，提高我国速度轮滑的竞技水平。有必要对影响我国速度轮滑运动发展的因素及对策进行研究。

This he calls terminal velocity,the speed where objects of equal mass all travel at the same speed.

这就是他所说的终极速度，一个相同体积的物体以同一速度运行的速度。

Under maximal flux (Vi = 4.3 m/s),fluid field of 16 cross sections in the model were investigated, the tangential velocity empirical equation of each partition was got, and empirical equations of axial and radial velocity on the ring partition between baffle bar and cylinder wall were obtained.

在全气速（Vi = 4.3 m/s）下测得了流场中各部分共计16个截面的流场分布，分别拟合得到各区域外旋流中切向速度分布经验公式；拟合得到在导流体与筒壁间环形段轴向速度分布和径向速度分布经验公式。

Then, the distribution of tangential, radial, axial components of velocity and pressure is given.

同时得到了流场内部切向速度、径向速度、轴向速度及压力分布规律。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷