精度

In chapter 4, the influence of the wave-front curvature of Raman pulses on the measurement precision of gravitational acceleration in atom interferometers is analyzed with the method of a transmission matrix. It is shown that the measurement precision of gravitational acceleration is highly dependent on the spot size of the Raman pulse, the temporal interval between Raman pulses and the optical path difference of the two counter-propagating Raman pulses.

第四章运用高斯光束传输矩阵的方法计算了原子干涉仪实验中拉曼光束波前弯曲对重力加速度测量精度的影响，得出了精度与拉曼光束光斑大小，拉曼脉冲作用的间隔时间，以及拉曼光束光程差之间的关系。

The theoretical and experimental results show that self-collimation guideway grinder is of excellent stability of precision.

重新调整床身导轨几何精度是一件十分费事费时的工作，不但影响工厂的正常生产，而且机床精度的保持性也差[2 ] 。

With a view to lessen this effect and by referring to the wear pattern,the methods of design and computation of the guideway are thoroughly studied.

本文通过机床导轨的磨损试验，研究机床导轨的磨损规律，研究导轨磨损后所引起的刀架或工作台横向偏移和偏转，研究导轨磨损后对机床加工精度的影响；并从导轨磨损后使其尽可能不影响机床加工精度的观点出发，研究导轨按磨损规律的设计与计算。

Gyro is an important part in these systems, which affects the precision directly.

其中，陀螺仪是导航和定位的关键部件，导航和定位的精度与陀螺的输出精度有着直接的关系。

In this paper, a new type of platform gyrocompass with high accuracy is studied systematically in schema design a...

本文对新型高精度平台罗经进行了系统的研究，分析了方案设计和系统实现两方面的内容，给出了-个新型高精度平台罗经的完整结构。

In this paper, a new type of platform gyrocompass with high accuracy is studied systematically in schema design and system realization, a preliminary structure block diagram of the platform gyrocompass is established.

本文对新型高精度平台罗经进行了系统的研究，分析了方案设计和系统实现两方面的内容，给出了-个新型高精度平台罗经的完整结构。

The system is a high speed powder Hame spraying system,equipped with high precision powder feeder and oxygen acetylene name heat source,with compr- essed air to improve the Hame heat utilization The system consists of three pads:high energy torch,high precision powder feeder and gas supply Unit.

该系统是以氧乙快火焰作热源、用压缩空气提高火焰热能利用率、配备高精度送粉器送粉的高速火焰粉末喷涂装置。由高能喷涂枪、高精度送粉器和供气装置三部分构成。

Results indicate that:(1) by using HANTS, the researchers could get the EVI/NDVI harmonic curves, the mean VIs and the amplitude of the harmonics which then were utilized in the identification of the cultivated land, and EVI appeared to be more precise, with the overall accuracies of 97.17% and 95.99% and Kappa coefficients of 0.7938 and 0.6518, respectively.(2) Multiple cropping index was extracted by counting the number of the curve's peak; and when the threshold of the peak value of the NDVI and EVI curves were set as 0.25 and 0.20, respectively, the fallow land could be well figured out.(3) From harmonic curves, some eigenvalues, such as time of the maximum growth rate, time of peak and the value of peak can be extracted, based on which the crop types can be primarily distinguished. And EVI still performed better than NDVI in this section.

结果显示：（1）利用傅立叶谐波变换得到的EVI和NDVI时间谱曲线的谐波余项及谐波振幅对耕地进行识别，从识别精度来看，EVI要优于NDVI，识别精度分别为97.17%和 95.99%，Kappa系数分别达到0.7938和0.6518；（2）通过计算时间序列曲线的波峰数能够提取耕地的复种指数，并且在EVI和NDVI曲线波峰阈值分别设为0.20和0.25时，休耕地能较为准确地被识别出来；（3）通过提取作物生长期内曲线的VI最大增长速率时间点以及峰值时间点等信息，作物种类能被初步识别，并且EVI较NDVI具有更强的识别能力。

The precision identification has been made by open channel now measurement according to now measurement precision of non-throat flume in headwork of high main canal of the Dashuijiang irrigation project and the availability has also been evaluated based on quantitative and quantitative analysis.

大水港灌溉工程高干渠渠首无喉道量水槽的量水精度，采用明渠测流法进行精度鉴定，并在定量定性的基础上，评定量水槽的适用性。

Keywords: feature point matching,homography,affine transformation,location error compensation,epipolar geometry

为了提高图像匹配的精度，提出了一种针对两幅图像的高精度特征点自动匹配算法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。