精度

Supervised and unsupervised image classification were applied to the study area TM image and t o the paddy field TM image. And the early rice areas were calculated by each met hod. Using the proposed methodology improved the quantitative accuracy of ear ly rice area estimated up to 93.98%, whereas it was 82.83%when image classific ation was used only. The extracted information from the c lassification is belonging to the early rice and not to any other vegetation. Si nce the GIS database is available, the method is easily applicable to any new RS images.

不同方法比较结果表明：非监督分类法不能用于提取丘陵山区的水稻种植面积；只用TM资料估算龙游县早稻面积，与统计数据相比，平行六面体分类法、最大似然分类法精度分别达到82.83%和59.95%；而用GIS 与TM资料集成技术对水田分布图进行分类估算早稻面积，平行六面体分类法、最大似然分类法的估算精度分别达到93.98%和60.65%，所以利用平行六面体分类法对南方丘陵山地早稻种植面积估算是可行的。

Cogging force deteriorates significantly positioning accuracy and tracking accuracy of servo system in a permanent magnet linear motor.

直线电动机cogging力是影响伺服控制定位精度和跟踪精度的重要因素。

It has comparably high accuracy and is widely used to check the volumetric performance of CMM and machine tools.

Renishaw检查规具有较高的检测精度，广泛应用于三坐标测量机和数控机床的空间精度检定。

Taking a example for verilying the feasibility and computation precision of the approach,the computation results show that the PSO-based approach is a useful tool for solving such nonlinear optimization problems as cylindricity evaluation with complicated goal function and more parameters. It is superior to that given by the Least Square Method and a little better than or equal to those given by GA-based method and another Minimum Zone Method.

计算结果表明，该方法对于圆柱度误差评定这类具有复杂目标函数和较多参数的非线性优化问题有很好的计算性能，优于最小二乘法；与遗传算法和其它满足最小区域条件计算方法相比，计算精度略优于前者或者与前者相当，能够获得精度较高的结果，而突出优点是简单，易于实现而且计算效率较高。

The research results showed that: The accuracy of dimidiate pixel model is better than that of the experiential model during the vegetation retrieval.The curve degree of the cubic curve fitting is the best during the three built experiential models, but the experiential model is very simple and used widely.

研究结果表明：植被盖度反演中，像元二分模型的精度高于经验模型的精度，在建立的三个经验模型中，又以三次拟合曲线的拟合度最高。

With the ETM+ as data source,the Dimidiate pixel model was established based on vegetation index to extract vegetation coverage in Maowusu sandland.

以ETM+为数据源，基于植被指数建立像元二分模型，对毛乌素沙地进行了植被覆盖度提取，然后根据实地调查数据对提取结果进行了精度验证，二者线性相关系数达到了0.92，平均精度为79.4%。

With the increasing of transmiting current and reducing of the minimal discriminable voltage, the influence of geological interference becomes more evident, so it is very necessary to introduce feasible mathematical methods to direct and inverse calculation of TEM, such as ANN, GA. Via an experiment on a known-profile in a copper mine, it is validated that the flexibility of the system and feasibility of the interpretation software.

数据采集软件、后期处理解释软件的编制及解释精度问题由于发送电流的加大和最小可测电压的提高，在加大了勘探深度的同时，地质噪声和各种效应的影响将更加明显，从而对解释软件也提出了更高的要求，传统的数据处理解释软件不能满足要求了，因此有必要引入成熟的数学方法：如神经网络等，增加一维、二维的解释精度与速度，并对于特殊三维体作正演计算。

The control methods in existence can not suffice for the needs of tracking precision bit by bit. How to improve the tracking precision has come to be the disquisitive highlight recently.

现有的控制方法已渐渐不能满足控制精度的要求，如何提高伺服系统的跟踪精度成为近年来研究的热点。

The result indicates that the accuracy of automatically determining orbits is better than that from GPS broadcasting ephemerides.

模拟结果表明，在空间测距精度一定的情况下，自主定轨精度能高于GPS广播星历，因而能较精确地维持卫星系统的坐标框架。

In the field of spaceborne remote sensing, a geometric collinearity equation of pushbroom sensor with the Kepler parameters of the satellite orbit and the attitudes of sensor has been developed. Testing the sensor model on a SPOT-5 imagery, the planimetric accuracy of object positioning is 83.392m on the ground. According to the orbital dynamical model and the kinematics model of satellite attitude, an algorithm of extrapolative location is developed. Testing the algorithm on CBERS-2 high resolution satellite imageries of central China, when the depth of extrapolation is 300km, the planimetric precision is 53.555m including the measurement errors as well as the modeling error over than the 568m which is the planimetric precision of systematic rectification.

航天遥感方面，利用6个卫星轨道开普勒参数和3个传感器姿态建立了推扫式卫星遥感影像的严格构像方程，经对一景SPOT-5影像实施无地面控制对地目标定位获得了83.392m的平面精度；根据遥感卫星的运动规律，提出了卫星轨道参数、传感器姿态和扫描侧视角的外推算法，用于资源二号卫星影像的外推对地目标定位，当外推深度达300km时，目标定位精度不低于50m。

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。