精度

In the system of high precision and low speed, Because of the existence of the nonlinear friction, the static and dynamic performance of the servo system is very bad, such as stick slip, hunting, large error and so on, Because the traditional control of PID is hard to solve the nonlinear problem of the servo system, so this paper begins to introduce a new control method which is named adaptive fuzzy PID, It utilizes the rule of the fuzzy control to adjust the parameter of proportion, integral and differential on line, So this control method has some intelligence to improve the static and dynamic performance of the servo system.

在高精度、超低速伺服系统中，由于非线性摩擦环节的存在，使系统的动态及静态性能受到很大程度的影响，主要表现为低速时出现爬行现象，稳态时有较大的静差或出现极限环振荡；由于传统的PID 控制很难解决伺服系统中的非线性问题，因而不能适用于高精度、超低速伺服系统；本文通过引入模糊自适应整定PID控制，利用模糊规则在线调整比例、积分、微分环节，使系统具有一定的智能，从而非常明显的改善伺服系统的静态及动态性能。

Based on digital cadastral surveying, the paper discusses Standard Operation Procedure of Cadastral Surveying by studying on cadastral investigation mode in Gulin county. and determines the general procedure of property investigation, priciples of land parceling and cadastral coding, and the investigation way of differrent land types. With field data collection and indoor work processing, the new cadastral map in Gulin county with the scale of 1:500 which meets the precision requirement. has been finally plotted.

本文正是在此基础上，从数字化地籍测量的角度出发，通过对古蔺县建成区和规划区的地籍调查作业模式的研究，探讨了标准地籍测量作业方法，并确定了权属调查的一般流程和宗地划分原则，地籍编号原则，以及社界、地类、农田的调查方法，通过对外业数据采集和调查所获取数据进行内业处理和精度分析，最终编制了满足精度要求的1：500比例尺古蔺县地籍图。

Products are widely applied to various: bend, water, stamping products, electronic products, and promptly, pen holder, piston, banding belt, clamp, toys, kitchen equipment and accessories, frame, welcome, vortex spring, tape, timer and starter, etc Our company owns advanced equipment and technology, high precision rolling mill, slitting machine, twisted, polishing machine, mirror 8K machine, automatic cutting machine, heat treatment, such as wind forming machine equipment, high precision instrument parts.

产品广泛应用到各类：折弯，水涨，冲件制品，电子产品、制管、弹片、笔夹、活塞环、捆扎带、卡箍、玩具、厨房设备、纺织机配件、综丝、洗尘器、涡形弹簧、卷尺、定时器和启动器等我公司拥有先进的设备和工艺、高精度轧机、分条机、拉绞机、抛光机、镜面8K机、自动剪切机、热处理流水线、发条成形机等设备以及高精度的测试仪件器。

When using γ-ray penetrance method to measure soil water content in the big model test, several influencing factors on measurement accuracy of the γ-ray penetrance method are analyzed comprehensively.

在运用γ射线透射法测量大型滑坡模型土体含水量的过程中，为了提高试验的精度，综合分析了影响γ射线透射法测量精度的多种因素。

In the dissertation the influences from the fabricating error and operation status of a pentagonal prism were discussed. The factors influencing the measurement accuracy of the system were analyzed theoretically.

文中还论述了五角棱镜的制造误差和工作状态对系统测量精度的影响，对大尺寸形位误差测量系统的精度进行了分析和实验，理论分析与实验结果相符。

There are many ways to calculate GPS satellite azimuth and elevation, but the precision is low. A new method to decide GPS satellite position using the broadcast ephemeris is presented, the way to checkup the precision is also given, and some research are made to analysis the error feature of the position which is calculated by the broadcast ephemeris as well, the results show the error is periodic.

GPS卫星高度角、方位角计算方法众多，但精度低；针对这点，提出了一种利用广播星历计算卫星高度角、方位角的方法，对该方法能够达到的精度提出了鉴定的途径，并分析了利用广播星历计算卫星高度角以及方位角的误差特点，结果表明利用广播星历计算的卫星高度角、方位角呈现出周期性变化的规律。

A new method to decide GPS satellite position using the broadcast ephemeris is presented, the way to checkup the precision is also given, and some research are made to analysis the error feature of the position which is calculated hy the broadcast ephemeris as well, the results show the error is periodic.

GPS卫星高度角、方位角计算方法众多，但精度低；针对这点，提出了一种利用广播星历计算卫星高度角、方位角的方法，对该方法能够达到的精度提出了鉴定的途径，并分析了利用广播星历计算卫星高度角以及方位角的误差特点，结果表明利用广播星历计算的卫星高度角、方位角呈现出周期性变化的规律。

By measuring missile movement inertia with torsion pendulum, the influences of periodic measurement error, systemic damp, period of swing object and corporative period of t he measured object and swinging object were analyzed. The relation among measurement error of movement inertia, measureme nt period, the period of swing object,corporaˉ tive period of tested object and swing object was proved. The maxi mal ratio between movement inertia for swinging obˉ ject and the measured object under conditions of different errors w as given under typical measurement precision.

通过扭摆测量导弹转动惯量的方法，分析了周期测量误差、系统阻尼、摆动体周期以及被测件和摆动体共摆周期对转动惯量测量精度的影响，得出转动惯量测量误差和周期测量误差、摆动体摆动周期、被测件和摆动体共摆周期之间的关系，给出了在典型的测量精度要求，不同的周期测量误差情况下，摆动体转动惯量和被测件转动惯量之间的最大比值。

With this method,carrier Doppler was firstly estimated with Periodogram Spectral Analysis method;then LOS Doppler velocity was calculated;and finally,the velocity of the receiver was compu...

首先应用周期图法估计片段GPS信号的多普勒频移，计算视距变化率，然后建立视距变化率方程，进而求得接收机的速度。通过Matlab模拟的信号和GPS仿真器模拟产生的高动态信号仿真验证了多普勒频移的估计精度和用户速度的测量精度。

We constructed a finite volume scheme of fifth order Hermite type with high accuracy for twopoint boundary value problems, choosing trial and test spaces as the fifthorder finite element space of Hermite type and the piecewise linear function space respectively. We didn't use higher derivatives as interpolation conditions, which is the same as the thirdorder finite element of Hermite type, but the scheme obtained had higher accuracy.

构造求解两点边值问题的一种Hermite型五次元高精度有限体积法，其中试探函数空间取Hermite型五次有限元空间，与Hermite型三次元相同，未引入更高阶导数作为插值条件，检验函数空间取分段线性函数空间，这样构造的格式求解精度更高。

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。