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The computation implies that the influence of truncation error of up/downwards continuation is about 0.001 m2·s-2, the maximum error is only 0.11 m2·s-2, which can be ignored in CHAMP gravity field recovery. The influence of the reference gravity field error of up/downwards continuation is less than 0.1 m2·s-2 in general, but the maximum error can reach 1.3 m2·s-2. To reduce this error, a high-precision gravity field model should be used in the up/downwards continuation.

计算表明:延拓误差中的截断误差部分影响量级约0.001 m2·s-2,最大误差仅为0.11 m2·s-2,可完全忽略;延拓误差中的参考重力场模型误差影响随参考场选取的不同而有所差异,整体而言小于0.1 m2·s-2,但最大误差可达1.3 m2·s-2,采用高精度的参考重力场模型能大大减小延拓误差影响。

The new method is given to design the optimum profile modification curve design The effects of optimum profile gear in improving the dynamic performance of gear transmission are verified in the Gear Dynamic Performance Test Rig In this dissertation, the main study contents and creative results are shown as following: The influences on the gear transmission system caused by the gear's accumulated error (periodic error and harmonic error) are theoretically studied. A new method is developed to simulate the gear's harmonic error by using the 2-order MARKOV process A simulated model of the dynamic performance which is excited by the gear's accumulated error is obtained.

本文在前人大量研究的基础上,结合作者承担的国家自然科学基金项目"齿轮传动动态系统辨识与三维修形研究"和山东省自然科学基金项目"齿轮传动动态性能仿真及结构参数、齿形的优化修形",采用理论和试验相结合的新思路,系统地研究了齿轮传动的动态性能,建立了能正确描述齿轮传动系统动态性能的仿真模型和系统辨识模型,给出了确定齿轮传动轮齿修形曲线的优化设计方法,利用自行研制的齿轮传动动态性能试验装置,验证了优化修形齿轮对提高齿轮传动动态性能的突出作用。

A measuring system which mainly consists of a high precision motorized translation stage of one dimension, POINT GREY Flea2-14S3 CCD camera and LED light source was designed and constructed. Based on a detailed analysis for experiment results, the periodic changing law of system error of LED facula centroid location in this measuring system was found. The results indicate that based on Flea2-l4S3 CCD camera, the random error of facula centroid location is about 0.018 pixels, the system error is about 0.06 pixels, and the total error is about 0.063 pixels (1/15 pixels). According to the total error above, this CCD imager can be widely used in many measuring systems which count on facula centroid subpixel detection.

利用高精度一维电动平移台、POINT GREY Flea2-14S3 CCD相机和LED光源构建了测试系统,对测试结果进行研究和讨论,发现了测试系统LED光斑质心定位系统误差的周期性变化规律,计算得到了基于Flea2-14S3 CCD相机的光斑质心定位随机误差为0.018pixels,系统误差为0.06pixels,总体误差为0.063pixels(约1/15pixels),能够应用于以光斑质心检测为手段的测量系统中。

It is pointed out that the error of indication E0 for the calibrated test length which are measured when the offset length between the ram axis and the stylus tip is zero shall neither exceed the maximum permissible error MPEE0 nor exceed 1/3 of the probe error,that the repeatability of E0 shall neither exceed the maximum permissible error MPE Rnor exceed the repeatability error of the probe,and that if the measuring data is rejected in acceptance and reverification,measurement must be carried at least 5 times at the same position for reducing the possibility of misjudgement.

提出探测轴探针针头零偏置长度的校准测试长度的示值误差E0应不超过最大允许校准测试长度的示值误差MPEE0,且不应超过测头误差的1/3;E0的重复性误差R不应超过最大允许重复性误差MPER,且不应超过测头的重复性误差。建议验收校准测量数据超差剔除后,必须在相应位置重复测量5次以上,以减小误判的可能性。

Check method of residual error was used to judge data error, as if sum of front K residual error was unlikeness with sum of back n-K residual error in measure row, it shown that exist linear system error in measure row.

使用残余误差校核法,若测量列中前K个残余误差之和与后个残余误差之和不相等,则测量列存在线性系统误差。

The measurement accuracy of the photoelectric theodolite is decided based on measurement requirement of the ballistic trajectory. Two simple equations were derived mathematically, one expression for positioning error of the ballistic trajectory, angle error of the photoelectric theodolite, ranging error, target slant range and height when one instrument is used, another expression for positioning error of the ballistic trajectory, angel error of the photoelectric theodolite, target slant range and intersection angle when two symmetrical intersection instruments are used.

通过数学解析的方法,推导建立了2个简洁的公式:1)单站定位体制下弹道点位精度和光电经纬仪测角、测距精度以及目标斜距、高角之间的数学表达式;2)对称交会测量体制下弹道点位精度和光电经纬仪测角精度以及目标斜距、交会角之间的数学表达式。

In order to decrease the error rate of speech recognition, speaker adaptation techniques are often used to adjust speaker-dependent acoustic models. MLLR (Maximum Likelihood Linear Regression) and MAP are two of the most popular techniques in recent years. MLLR uses the technique of regression trees. It calculates the transform matrix for each leaf node of the tree. This makes it possible to use fewer sentences to decrease the error rate of HMM-based speech recognition. However, while we examined the recognition result, we found that although the overall error rate decreased, but the error rate of certain confusable phones was higher. In order to solve this problem, we propose the use MPE (Minimum Phone Error Discriminative Training) to solve this problem.

在语音辨识技术的实际应用上,语者调适技术常被用做调整语者无关之声学模型,使其对於特定语者之辨识率有所提升,常见的语者调适技术有最大化相似度线性回归(Maximum Likelihood Linear Regression),其精神在於透过对语音辨识模型相近的mixture做群聚,再对各个群聚做调整,以期能达到利用少量语料,提升辨识率的目的,但其缺点为,在发音上相近的模型,其mixture原本就极为近似,若再分类为同一群聚做调整,容易因为使用者的发音习惯,而使模型偏向ㄓ或ㄗ,因此虽然整体的辨识率获得提升,但却造成混淆音的错误率上升。

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。

A commutation error is then considered in addition to the conventional residual error to generate the innovative residual error. Such an error is applied into cost functions to derive finite impulse response and infinite impulse response filter-based adaptive algorithms for ANC applications, referred to as FxRLS/CE and FuRLS/FRE+CE algorithms, respectively. Convergence analyses based on Lyapunov stability criteria for time-varying discrete-time systems can be carried out for the FxLMS/CE, FxRLS/CE and FuRLS/ FRE+CE algorithms to ensure stability. Computer simulations and experiments demonstrate that the innovative residual error-based adaptive algorithms can free the restriction of the slow-adaptation assumption in the conventional ANC approaches.

本文中也定义一交换误差并且加入到传统残留误差行形成新残留误差来改善适应性演算法的收敛速度,使用新残留误差推导出了有限脉冲响应滤波器与无限脉冲响应滤波器之适应演算法的新适应性演算法分别为: FxLMS/CE、 FxRLS/CE 和 FuRLS/FRE+CE 演算法,并且以离散时间的 Lyapunov 稳定性准则来证明演算法的收敛性,电脑模拟与实验也显示新演算法免除以往滤波器的参数必须缓慢更新的条件。

In order to evaluate aiming error of missile on the warship or on the submarine, including the error of warship position, the error of reference azimuth and the error of transfer measurement given by the navigation system, and try to divided them from the general error, it is highly important that we estimate and evaluate missile system of mobile bedding launching.

为了评估从舰船/潜艇上发射导弹的瞄准误差,包括舰船导航系统给定的船位误差、基准方位误差及其传递测量误差,并试图把它们从总的瞄准误差中分离出来,这对于动基座发射导弹武器的瞄准精度的评价极为重要。

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相关中文对照歌词
The Dark Wood Of Error
Trial & Error
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Un Error De Los Grandes
Trial And Error
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Un Error
Dark Wood Of Error
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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

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