精度

The maximum perturbation accelerations and their percentage contribution in the sum of all accelerations due to the lunisolar perturbations,Earth tides,ocean tides,atmospheric tides,pole tides,relativity effects,atmospheric drag and solar radiation pressure are computed on the basis of simulated orbit.

结果表明：①在1.0ⅹ10-9m/s2的非保守力测量精度内，除大气潮可忽略外，其余摄动必须考虑；②考虑GOCE预期定轨精度(3 cm)，在弧长小于2.0 h的短弧定轨中，固体极潮和大气潮的影响可忽略，在长弧定轨中，忽略任何一种保守力的轨道预报时间均不足0.5 d；③各种潮汐对重力梯度观测值的影响量级均小于GOCE预期的测量精度(3 mE)。

The rice with higher milling degree shows not only better appearance, but also more appetizing and more welcome by consumers. However, the more milling time is, the more nutrimental component will be lost in the process. There is illogicality between milling degree and nutrimental quality. Therefore, prompt inspectation of the milling degree of rice is very important.

大米的加工精度越高，不仅其外观品质更好，而且口感也更佳，更受消费者欢迎；但是在大米加工过程中，碾米的次数越多，大米中的部分营养成分会失去的越多，即存在着加工精度与营养品质之间的矛盾，因此，确定合适的大米加工精度十分重要。

Then, concerning the difficulty of ascertaining hysteresis time of piezometric tube, Genetic Algorithm-Radial Basis Function Neural Network model is developed according as the method that reservior level is rectilinear correlation with piezometric tube level, which not only could be calculated by computer but also is showed logical and feasible.

针对以往监测模型预测精度难以保证的的问题，本文在分析比较了几种土石坝安全监测预报模型的基础上，提出了一种新的安全监测预报模型——遗传回归模型，该模型通过遗传染色体对建模因子进行优选，并在适应度函数中综合考虑模型拟合精度与预测精度平衡。

A stereo pair of SPOT-5 imagery acquired in across-track mode is selected and used. The empirical results have shown that the proposed geometric model, compared with the original model which considers the CCD line-scanner side watch angle as a constant, can improve the x-coordinate accuracy of image points, and can also raise the height accuracy of object space coordinates significantly while maintain the same level of the planimetric accuracy.

经对一SPOT-5异轨立体像对的试验表明，利用改进的几何模型和视CCD线阵列侧视角为常数的仿射变换模型对立体影像进行几何处理，前者较后者的像点x坐标精度有一定的改善，物点的高程精度有所提高，平面精度两者基本一致。

Four sets of actual aerial photos are used to test;which are at different scale and in different terrain.The empirical results verify that image elements of exterior orientation obtained by a POS can satisfy the accuracy requirements of topographic mapping,no matter which scale and terrain the empirical block is classified to.However,to satisfy the accuracy requirements of object point in elevation,the accuracy requirements of exterior orientation elements are at least one time higher than that in planimetric mapping.

通过对摄自不同地区、多种摄影比例尺航摄影像的实验表明，由POS系统获取的影像外方位元素进行安置元素测图完全可以满足各种比例尺、不同地形图测绘的精度要求，但为了满足地物点的高程精度，对影像外方位元素的精度需求较用于平面测图时的至少要高出一倍以上。

Address the characteristics of non-uniform speed transmission, position function control and transmission ratio function control were presented to realize electronic gearbox. The differences between position function curve interpolation and general NC interpolation were analyzed. Considering the effect of uncontrollable continuous principal motion, interpolation slope and position function precompensation interpolation were presented. The relationship among interpolation, servo dynamic response and transmission precision was studied. The coordinate linkage relationship and electronic gearbox scheme in noncirclar gear hobbing were studied.

对电子齿轮箱实现非匀速比传动进行了研究，提出了位置函数控制与传动比函数控制两种非匀速比传动关系的实现方法；对位置函数控制方式，分析了位置函数曲线的插补与普通数控插补方法的区别，提出了插补斜率的概念与位置函数曲线的预补偿插补方法；对非匀速比电子齿轮箱传动精度进行研究，得出了插补精度、伺服系统动态性能指标与传动精度之间的关系；研究了非圆滚齿加工坐标联动的非匀速比传动关系，列出了多种可以满足要求的电子齿轮箱传动方案。4。

In the amino-acid composition with auto-covariance function-added approach, the overall resubstitution accuracy is 96.71%, the overall accuracy of Jackknife test is 82.19% and the overall accuracy of the cross-validation test is 86.88% when Wold's index is used.

在氨基酸组成和自协方差函数相结合的方法中，采用Wold等的疏水值时，训练库的自检验的总精度为96.71 %，其Jackknife检验的总精度为82.19 %，检验库的他检验的总精度为86.88 %。

In the amino-acid composition with auto-correlation function-added approach, the overall resubstitution accuracy is 95.34%, the overall accuracy of Jackknife test is 81.92% and the overall accuracy of the cross-validation test is 86.61% when Miyazawa and Jernigan's index is used.

结果表明：对非同源蛋白质数据库，在氨基酸组成和自相关函数相结合的方法中，采用Miyazawa和Jernigan的疏水值时，训练库的自检验的总精度为95.34%，其Jackknife 检验的总精度为81.92%，检验库的他检验的总精度为86.61%。

8400B AUTOSAL Laboratory Salinometer is a high accuracy instrument to determine salinity levels in saline samples by measuring the equivalent conductivity ratio Accuracy is better than ±0 002psu over 24 hours without recalibration It's widely used in sea-borne or land base laboratory High accuracy characteristic is especially manifested in deep ocean investigation and observation This paper gives a detailed and complete introduction to the instrument's capability, utilization, operational steps and...

AUTOSAL 84 0 0 B型实验室盐度计是一种高精度的测量海水电导率的仪器，其测量精度可达到± 0 。0 0 2 psu，被广泛应用于海洋环境测量以及现场和实验室仪器定标等领域。它的高精度测量特性在深海大洋中显得尤其重要。本文将详细介绍该盐度计的性能，以及操作步骤和使用技巧等，以便充分展示和发挥该盐度计的作用

The conditions to measure accurately and the principles to select parameters of the multi— probes EST method are proposed, and the theoretical research, computer imitation and the experiment on a machine tool prove that these principles and suggestion are necessary and effective. The influence of the initial value errors of the probes, the installation error of the probes system, and the remaining error caused by the radical error motion are analyzed quantitively on the measurement accuracy of the multi—probes EST method. The influence of the error caused by the probe's axes which is not in a plane and the perpendicularity error of the plane which the probe's axes is in to the stational axis are discussed on the measurement results.

结合理论分析，对这些EST方法进行了计算机仿真分析和研究，重点研究了这些方法的应用条件和误差分离精度，所得出的结论是：三测头法EST基本上能实现各项误差的完全分离，适于在位测量使用；二测头法在恰当地选择测头安装角的条件下，可以得到较高测量精度，适于大型零件圆度、圆柱度、径向圆跳动和全跳动的在位测量；对置两测头时域法可以在一定程度上改善单测头法测量精度，但对随机径向误差无能为力；对置两测头频域法存在严重的谐波损失。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。