It is concluded that the precision of these points is attenuated equidistantly as concentric circles. Its center is the weighted average of the coordinates of known points with the radius determined by the precision, the quantity and the distribution of known points. The precision of station points is almost independent of intersection angle, and the precision of known points is almost independent of station point. In some circumstance, the detail points may be more precise.

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The simulation shows that the high accuracy FFT with Blackman windows has the higher accuracy ,especially for the phases.

在諧波分析中論文對比分析了FFT算法、高精度FFT法九色永久地址、遞歸FFT法黄片、com好吊操视频、STFT法的算法優(yōu)劣性，采用了加Blackman窗的插值高精度傅立葉算法国产真实偷人视频在线看，仿真分析表明高精度FFT算法精度遠高于FFT自拍偷拍15，尤其是相位精度的提高更為明顯。

Through reforming the YC7150 gear grinding machine of conical surface of grinding wheel by CNC,the proposed approach will be of much help in increasing the accuracy of the grinding machine tools and can also be used to change the equipment of gear process,and can give rise to the principle dividing precision less one pulse equivalent .

對高精度齒輪加工設備的傳動原理進行了分析，具體研究了在高精度數(shù)控分度時計算分度指令脈沖數(shù)所采用的均勻分配脈沖數(shù)的方法欧美精品一区二区观看，并用此算法對 YC715 0錐面砂輪磨齒機進行數(shù)控改造性交配视频网站35，以進一步改善齒輪加工設備，提高機床加工精度99超碰免费，使理論分齒精度小于一個脈沖當量操操射射。

The matching device automatic test-board is the checking tool checked the matching device capability, precision and reliability are the technique of the the matching device, the precision is the precondition of checking the matching device, the reliability is credibility degree of the decision checking consequent.the topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent ac to transfer dc module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2the feedback self-checking module is constructed by singlechip compositive 16 high accuracy a/d , established a closed-loop control system through this module and improved system's overall precision effectively.

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The research of both theories and practices of gridding in the dissertation shows that: Linear interpolation based on triangulation is simple computationally and fast, but its gridding results isn't smooth and its precision is low; Multiquardric method is also simple computationally with high precision and good effect, but its gridding is slow because it is based on global calculation; Minimum curvature method is fast with high precision and good effect, but its gridding quickly degrades over areas with sparse data control when grid spacing smaller than the actual grid spacing is used; Ordinary Kriging method is high-precision, but its gridding is slow because of large calculation; Inverse interpolation is a computationally fast, efficient and robust method with high accuracy and perfect effect, and its gridding results of different gridding orientations are basically identical. Inverse interpolation is suitable for thegridding of geophysical irregular data, especially for large-scale geophysical irregular data.

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Main job is to guarantee the scraping interaction and equipment on both sides of the friction surface or can obtain higher precision and accuracy, precision and shape accuracy, precision and contact transmission because of good lubrication, manual and repeatedly is worthy, large amounts of wind, time-consuming, scraping the time needed for different devices vary, such as boring slider and slide block wind profiling, between the match before measuring clearance between the original value, and then according to the technical requirement to measure the value of time and scraping scraping, then apply DanFen red on the slider, manual let slip on the slide seat back and forth, they do straight-line movement between full contact and friction, reoccupy scraper scraping friction creates the contact point, so repeatedly, until the technical requirements for the match, single within 2 days, must blow to the boring if all the time to work with wind, a half month is required.

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The results showed that:(1) some governing points, which were measured by submeter precision GPS, were utilized to correct the 1 m precision remote sensing image and it could satisfy the desired precision of geometrical correction, therefore, this method could be used as geometrical correction in the region where was short of the big scale relief map;(2) the density of the original data was the main factor to affect precision of the volume, and the precision of the calculated volume of earthwork could be improved to more than 90% when using the test points and feature points; the sparser the data density were, more significant could be improved; On the base that elevation of test points were measured by the submeter precision GPS, the error of the volume, which was produced by vectoring relief map to obtain DEM, could be calculated, and the calculation precision of the earthwork could be improved markedly.

結果表明：利用平面精度達亞米級的GPS測量控制點坐標對1米分辨率的遙感衛(wèi)星影像進行幾何校正日本女子婬荡视频一区二区三区，能夠滿足其幾何校正的精度要求，可以解決缺乏大比例尺地形圖地區(qū)的高分辨率遙感衛(wèi)星影像的幾何校正問題国产JizzJizz毛片；通過對模型數(shù)據(jù)的分析日韩福利片影音先锋在线播放网站视频，數(shù)據(jù)密度是影響體積精度的主要因素，利用檢測點高程和特征點可以提高土方量計算的精度中文字幕日韩三级片一区二区，使土方量計算的精度達到90％以上亚洲天堂嗯舒服好爽啊，數(shù)據(jù)密度越稀疏，精度提高越顯著国产作爱视频免费播放；采用高程精度達厘米級的RTK(Real Time Kinematic實時動態(tài)差分)測量檢測點的高程岛国毛片高清观看在线wy999，對用地形圖掃描矢量化形成的DEM模型進行檢測求出誤差體積，可以大大提高土方量的計算精度亚洲无码色色色。

Whether the inner cylinder is drilled or not do not affect obviously the measurement accuracy. The accuracy of the drilled outside cylinder is higher than the undrilled ones, and the drilled holes are better to be equally distributed, further more, the number is less than 36 with the diameter of 3mm. The sealed outside cylinder can lower the measurement accuracy. The thinner material of sealed inside cylinder is and the more ventilative function is, the higher accuracy will be achieved. Moreover, when the space between inside and outside cylinder is smaller, the measurement accuracy also becomes higher.

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When the disturbing potential of 1m2/s2 accuracy, or the approximate velocity of accuracy less 2mm/s in the formula of the rotation of the gravity potential is required, the satellite orbit data not satisfied the potential rotation computing demand are rejected from the GFZs Rapid Science Orbit and TUMs ReducedDynamic Orbit. If the disturbing potential is desired 05m2/s2 at satellite track, the satellite velocity required in formula of the rotation of the gravity potential should be recomputed or the GFZs Postprocessed Science Orbit is adopted.

當要求在衛(wèi)星軌跡處獲得1m2/s2精度的擾動位時，也即要求位旋轉效應公式中衛(wèi)星速度的近似精度小于2mm/s時激情综合丁香五月，GFZ的快速科學軌道中国AV黄色网站、TUM的約化動力法軌道只需要剔除那些速度精度不滿足要求的衛(wèi)星軌跡點；當要求在衛(wèi)星軌跡處獲得05m2/s2精度的擾動位時成年美女黄网站18禁免费动漫，應當重新估算上述軌道的速度信息香港一级婬片A片AA，或采用精度更高的GFZ事后科學軌道。

Shadi major equipment may be walking a wire Cutting Machine; Taiwan-Green high-precision surface grinder; significant number of high-precision milling, precision and outside circular grinding, NC Fast thread cutting machines, ultrasonic composite die polishing machine, and other precision integrity Mechanical processing equipment, and to introduce the most advanced domestic and foreign 5/10000 accuracy of the Japanese optical projector, and high-precision tool microscope and a high degree of precision measurement orbit testing equipment such as the high-precision product quality assurance.

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