查询词典 residual errors

Based on Baard's theory of data snooping, this paper studies the charactri- stics of the reliability matrix in dynamic surveying system. The influence pattern of the gross errors in models of state and observation on the residual errors is discused.

自巴尔达教授提出可靠性理论和数据探测法以来，经各国学者的进一步研究和完善，在静态测量系统的数据处理中得到广泛的应用，并形成了比较完备的理论体系。

In model experiments, we find that the deviation of the first derivative calculated by Fourier transform is very large to comparing with the theoretical derivative, but the fitting effect of the derivative of anomalies calculated by cosine transform is very good. The calculation accuracy of data are all very high except that errors of several data on the boundary are large because of the residual Gibbus effect induced by finite truncation of gravity anomalies. Errors are -009%～5%.

模型实验中发现，用Fourier变换计算的一阶导数与理论导数偏差很大，而余弦变换计算的导数与理论异常导数拟合效果非常好，除边界几个数据因重力异常的有限截断产生的吉布斯效应残留使误差较大外，数据的计算精度均很高，误差为-009%～5%。

Moreover, blobs may move too close to the boundary because of advection errors or other numerical errors. It may cause serious fluctuations in evaluating the strength of the vortex sheet. In order to reduce the fluctuations, these near-wall blobs are also manipulated in use of the concept of "residual vorticity". Finally, we apply the so-developed solver to a simulation of the flow past an impulsively started circular cylinder at different Reynolds numbers.

此外既有涡泡也可能因对流或其他数值误差造成过於靠近边界，因此我们也设计一专门处理过於靠近边界涡泡之方法，以其他计算元素取代这些涡泡，降低进入物体内部之环量，进而降低涡片强度计算上的扰动。

Based on the analysis of the mechanism of robot manipulators, a trajectory tracking controlling research model is first built up with ADAMS, and its mathematical model is formulated through the study of robot kinematics and dynamics. After the modeling errors are analyzed in practical robotic systems, a conception of centralized error is brought forward according to the theory of weighting functions. In the case of modeling errors' exist, the robotic uncertain model is derived by introducing an auxiliary control variable into inverse dynamic analysis. The control strategy of robust exponential convergence is applied to the robotic uncertain model, the applicable conditions and the applicable controller with this application are presented. The stable control effect under three main model uncertainties (parametric errors, joint disturbs, joint frictions) are systematically studied on the previously built research model. The problems of robust exponential convergence controller which often results in unstable output and so produces a large relative error when the input trajectory is in a small range are resolved by adjusting the control parameters based on the controller's structure.

本文在机械手的机械结构分析基础上，利用ADAMS建立了用于机械手轨线跟踪控制研究的机械手模型；通过对机器人运动学和动力学问题的研究，建立了机械手研究的数学模型；分析了机器人系统中模型误差的主要来源，根据加权函数法分析，提出了模型集中误差的概念；在存有模型误差的情况下，采用逆动力学结构并引入辅助控制量，由机器人误差模型推导了机器人非确定性模型；提出了采用鲁棒指数收敛法对上述机器人非确定性模型进行鲁棒镇定的控制策略，并给出了对机器人进行鲁棒指数收敛控制时系统不确定因素应满足的匹配条件；针对机械手研究模型，深入研究了鲁棒指数收敛控制器对机器人系统中常见的模型参数误差、关节扰动、关节摩擦等不确定因素的镇定控制效果；针对鲁棒指数收敛控制器易产生控制量振荡的问题以及在小范围内系统轨线跟踪的稳态误差过大问题，本文分别提出了基于控制器结构的控制参数调整法和基于轨线跟踪范围大小的控制参数分段切换法。

Then , aiming at characteristic of MCG data , we design the object of error analysis and make concrete analysis by error theory . We draw the conclusions that MCG signals measured by SQUID include obvious random errors and no system errors and crassitude errors .

本文根据心磁信号的测量过程，分析了测量过程中可能产生的误差，针对心磁数据的特点设计了误差分析对象，应用误差理论进行分析计算，得出了通过SQUID测得的心磁信号包含明显的随机误差，无根据怀疑存在系统误差和粗大误差的结论。

Hard disk partition table errors are serious errors, different errors will cause a different degree of loss.

分区表错误是硬盘的严重错误，不同错误的程度会造成不同的损失。

The abnormal values and pseudo-modes existed in the measured FRF can usually introduce errors into the result of structure modification, for the purpose of eliminating these errors and carrying on dynamic modification of complex structures in a large scale, the fictitious force modification method, which is based on constructed FRF, is proposed and it can restrain the influences of test errors on modification results remarkably. Furthermore, it is more convenient and precise.

实测频响函数中存在异常值或虚假模态对结构修改会产生较大的误差，为消除其影响，并进行复杂结构的动力大修改，本文还提出了基于构造频响函数的拟力修改法，这种方法能显著地抑制测试误差对修改结果的影响，且处理方便、精度高。

Hard disk partition table errors are serious errors, different errors might lead to different losses.

分区表错误是硬盘的严重错误，不同的错误程度会造成不同的损失。

Through virtual experiment to obtain large sample data respectively on errors of displacement, velocity and acceleration with regard to the executive mechanism, and there out obtained the distribution law of errors and acquired the reliability of errors.

通过虚拟实验分别获取关于执行机构位移、速度、加速度误差的大样本数据，并由此得到误差的分布规律，求取误差的可靠度。

The model of errors analysis is established by applied force and transferring law of original errors. The modal with universality can be applied to position errors analysis of plane and spatial mechanism.

该方法通过机构中作用线、运动线研究原始误差传递的规律，建立误差分析模型，概念清晰，具有一般性，适用于平面与空间多种机构的位置误差分析。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。