查询词典 precise

The worm gear and the worm shaft is adopt precise process and precise match checking, Insure the satable transmission、 low temperature、low noise level、high efficiency and long life.

蜗轮蜗杆输入、输出部分采用精密光整处理，确保整机不生锈，提高产品档次和使用寿命。

It indicates that our study on magnetic suspension train has entered advanced cavalcade.In this paper, combining the actual circumstances of precise engineering survey of magnetic suspension train project in Shanghai, the setting and observation of construction network in each course are introduced. The making of tramroad girder is introduced, and the control survey technology of precise regulating is also analyzed in detail.

本文结合上海市磁悬浮快速列车工程精密工程测量的实际情况，介绍了上海磁悬浮工程基础施工控制网的布设、观测，以及各施工放样阶段控制网的布设、观测及精度要求分析，并对轨道梁的制作和轨道梁的精调测量控制技术作了较为细致的分析介绍，最后讨论了磁悬浮工程变形监测的方法。

The principle and the mathematical model of reduced-dynamic precise orbit determination are discussed based on precise point positioning technique by zero-differenced dual-frequency P codes and epoch-wise differenced carrier phase data. Then the key issue in the reduced-dynamic POD, i. e. the pseudo stochastic pulses and their impact on orbit determination accuracy are analyzed.

论述了基于低轨卫星星载GPS双频观测值的精密单点定位技术的简化动力学定轨方法的数学模型，分析了简化动力学定轨中的关键问题―伪随机脉冲的设置问题及其对定轨精度的影响。

The CNC machined tubes are machined and lathed with extremely tight tolerances to hold the focuser and lens cell in precise alignment The tubes have internal light baffles spaced by aluminum rods for precise positioning to avoid vignetting during medium format photography and when using wide field 2 eyepieces.

镜桶及附属装置以 CNC 被机器制造而且与精密又稳定地支持其中的透镜组装置。在精确的对光中光轴已经为精确的定位，被铝竿隔开避免在使用观测摄影中被移位。

Is the most precise clock, 4 the least precise one.

只在打印时间为'有时'时生效。

With precise model of satellite motion, osculating parameters and earth shape, the determination of the position information of each pixel is precise, and the accuracy of direct location can be improved to be 3km.

该方案通过建立精确的卫星运动轨道模型、卫星摄动模型，采用对称椭球体的地球形态模型和融入卫星姿态的地面扫描点位置的计算方法，使直接定位精度达到3个像元。

In the direct-location, with the precise model of satellite motion and its osculating parameters, a more accurate formula for the orbit calculation of satellite is obtained. Meanwhile, the determination of the position information of each pixel is more accurate with the precise model of earth shape.

二、直接定位中，通过建立精确的卫星运动轨道模型、卫星摄动模型，优选确定了卫星轨道计算公式，以提高卫星轨道计算精度；同时，采用对称椭球体的地球形态模型和融入卫星姿态的地面扫描点位置的计算方法，可使确定的地面扫描点的地理位置更精确。

At last, the research test the logistic regression model with sample dada. The results are as the following:(1)Based on the time series dada, the financial early-warning model contains more crucial information reflecting the dada characters, so it can avoid the obvious logic problem in the other analysis such as single section dada and multi-section dada analysis. The test result indicate that the new model have a more accuracy than others.(2) the research adopt the global principal component analysis to settle the problem of multiple collinearity, so the model would be more normative and precise.(3)the early-warning model uses the backward method to regress, so it gets a terser model of only five variables, but it still has a precise forecasting ability.

通过本文研究说明：（1）建立以时序数据为基础的财务危机预警模型，提高了样本中重要财务趋势特征的信息含量，从而克服了国内外单截面及多重截面分析中普遍存在的明显逻辑问题，检验结果表明，利用时序数据建立的logistic财务危机判别模型较截面数据基础模型的判别准确率要高；（2）采用全局主成份分析方法解决了模型中因子间的多重共线性问题，这一处理使logistic回归方法应用的规范度和严谨度得到明显改善；（3）我们采用向后逐步回归的办法进行回归，使模型大大得到了简化，其中只包含五个自变量，但是它的整体预测准确性却仍然比较高，使模型更具有实用性。

Ephemeris data by comparison is very precise orbital and clock correction for each SV and is necessary for precise positioning.

Ephemeris 数据相比之下是十分精确的轨道和时钟纠正信息，每一颗卫星只会广播自己的Ephemeris 数据，这类数据的有效期或许有几个小时（取决于广播信息的包含的内容）。

The precise satellites clock error estimation algorithm of navigation satellites is studied in this paper. The computation of precise satellites clock error based on the non-difference phase is realized and the results are compared with the products provided by IGS analysis centers.

研究了导航卫星精密钟差的估计算法，编程实现了基于非差载波相位的精密卫星钟差的解算，并同IGS若干分析中心提供的精密钟差产品进行了比较。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。