可测的

The principle of three coordinate measuring machine is summarized as follows: Firstly, measured object is placed on the position of three coordinate measuring machine; Secondly, the object surface coordinate values are obtained; Thirdly, the geometry, shape and location of the vane are calculated by mathematic operation.

三坐标测量原理是：将被测物体置于三坐标测量机的测量空间，可获得被测物体上各测量点的坐标位置，根据这些点的空间坐标值，经过数学运算，求出被测物体的几何尺寸、形状和位置。

When signals under test are 单击此处编辑母版标题样式 weak, in order to realize signals transmission especially for long distance, direct current amplification or modulation and demodulation may be adopted.

传感器输出的电信号一般为较低频率分量(在直流至几十千赫兹之间)，当被测信号比较弱时，为了实现信号的传输尤其是远距离传输，的电信号一般为较低频率分量(在直流至几十千赫兹之间)，当被测信号比较弱时，为了实现信号的传输尤其是远距离传输，可，当被测信号比较弱时以采用直流放大或调制与解调。

The experiment results indicate that this structure can measure the micrometer structure through reflection grating and precise process tool mark without shockproof environment.

实验结果显示：透过对於反射光栅、精密加工刀痕等的量测，得知本架构具有量测微结构的初步能力，不需特殊的防震环境，可进行超精密的量测。

To use the well-developed inspection technology, two problems are solved. First, a crank-rocker mechanism is designed to put up and down the probe; and then an output interface equipment is built, which enables the operator observe the measurement results on time, by the communication between the pachometer and the output interface equipment.

考虑利用已成形的测厚技术，本文主要解决了两方面问题：机械上设计了曲柄摇杆机构实现了测厚探头的自动抬放；通过设计输出接口显示装置，利用它与测厚仪之间的通讯实现了测量数据的远距离传输，保证了操作者可实时观测到测量数据。

Through calculating the longest suppositional traverse model, when using grade E GPS to lay the near shaft point and electronic tacheometer (SET22D) to lay 7′′traverse under the shaft, the following results can be drawn: under the same or similar conditions, this design can meet the need of the 8300m longest mine holing through survey distance (the underground traverse is not more than 4300m), or the need of the long tunnels such as 1300m roads and railways.

通过笔者创建的可估算允许最大长度的虚拟导线模型进行推算，当采用E级GPS网测设近井点、全站仪(SET22D)测设井下7′′导线的情况下，得出了在类似测量条件下可满足8300m最长矿井贯通测量路线总距离(其中井下导线长度不超过4300m)、或1300m公路、铁路等长隧道贯通要求的结论。

A set of spectific primers was syn thesized according to HBV DNA sequence of Chinese strain, the whole X region was amplified by PCR method from the serum of 9 patients with chronic HBV infection , and then the PCR products were subcloned into pGEM Teasy vectors. Clones were randomly selected to be sequenced. Comparison of the cloned sequence was made to find the difference. After being compared, each sequence of selected clones is o f difference. The point mutation scattered through X region. Deletion mutations were detected in 19 clones of 37(51.4%), which caused different carboxyl endings of X protein. There is a hot region (after 123 aa code) where deletion mutation frequently happens.

以中国株HBV基因序列为依据，设计特异性多聚酶链反应引物，自9例慢性HBV感染患者血清中扩增HBV X基因，克隆入pGEM Teasy质粒，随机挑选克隆进行D NA测序以确定病毒的变异程度。37例测序结果提示来源于不同患者HBV X基因序列高度保守，但每个序列均不一致。X区除了存在广泛的碱基点替换突变外，序列的缺失突变占测序克隆总数的51.4％（19／37）；氨基酸缺失及移框突变多发生于123位氨基酸残基之后，可导致X蛋白多种羧基端形式。

The equation of ESCDAC is presented. Secondly, Based on this equation and the independent characteristic of observation valves, the ESR of the azimuth measurement error is presented by full - difference of the measurement equation which acts as the precision of ESCDAC.

然后以该方程为基础，根据该方程中各个观测量相互独立的特点，方位测量误差的均方根值可由测向方程的全微分求得，并将其作为电扫描恒差比幅测向的精度，由该精度公式可以看出，电扫描恒差比幅测向有很高的精度，并且在不同的角度上，其精度保持稳定。

To address this situation, I believe that the operation could be improved on are: the installation and adjustment of measuring, the first sub-scale do to adjust the nominal cylinder liner size, and then dial indicator card installed and well well inserted under the initial installation of the traffic card directly into the cylinder table by measuring the smallest cylinder liner wear, the cylinder table adjust the volume of the extended length of rod inserted, so that the volume of the dial indicator cylinder table has small hands around 1.5-2.0 preloading cell volume and cylinder volume table mother under lock locking plug, the final table and then measured the volume of cylinder rod and rod card inserted at the anvil micrometer measuring bar between the seat and the large dial and adjust the dial indicator to zero.

针对这种情况，笔者认为，操作上可改进为：安装和调整量具时，先将干分尺调整到气缸套的公称尺寸，再将卡装好百分表和初步安装好插杆的量缸表直接卡入所测气缸套磨损最小处，调整量缸表插杆的伸出长度，使量缸表的百分表小表针有1.5-2.0格左右的预压量并将量缸表的插杆锁母锁紧，最后再将量缸表的测杆和插杆卡在千分尺的砧座和测杆之间并将百分表的大表盘调整到零。

The outstanding feature of the new cutting dynamometer contrary to other type of dynamometer sensor is that it is more similar to general lathe tool. It can be installed on knife rest, so it is same wit practice state of cutting. Sensitivity of dynamometer is more high, especially main cutting force can attain 7.4pC/N. The calibration results show that it has high static linearity, and its natural frequency is greater than 5 kilohertz, so the cutting dynamometer has fully reached the dynamometer standard stipulated by CIRP-STCC.Finally, in order to measure the cutting force, the orthogonal experiment method in which the three factors are the diameter of cutting, feed and spindle speed is performed.

该新型车削测力仪与原有车削测力仪相比的突出优点是：它的外形接近一把普通的外圆车刀，可直接装夹在刀架上，与实际切削状态相同；传感器的灵敏度更高，尤其是主切削力方向可达到7.4pC/N；标定结果表明该传感器具有良好的线性静态特性，固有频率高于5kHz。

The hammer with the force sensor strikes the static rotor correction plane to send the excitation signals measured by the force sensor to the charge amplifier and to the signal collector.

由带力传感器的力锤敲击静态转子校正平面部位，将力传感器测得的激励信号送入电荷放大器，经放大后送入信号采集器，由电涡流传感器测得转子多个校正平面部位的位移响应信号，经电涡流测振仪放大后送入信号采集器，根据传递函数和影响系数之间的关系，可获得转子校正部位的影响系数。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。