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The error is mainly the system error of the experiment, and the velocity measurement error is the identification of the first arrival of the primary wave and the attenuation measurement is the coupling between the sample and transducer.

对误差分析表明，本文研究中的误差主要来自于实验系统误差，其中速度观测误差来自于对首波初至点的确定，声衰减观测的误差来源于探头与样品之间的耦合状况。

In view of the inclining error in installing to the work-piece in lapping, an analytic method for profile error is presented, new and old rectangular coordinates are established, and error model of work-piece between its actual and ideal curve is deduced through coordinate transform.

针对研磨中工件的安装倾斜误差，提出了导致工件面形误差的分析方法，建立新、原坐标系，应用坐标变换，推导出工件曲线上各点相对理想曲线对应点的误差模型。

Retrace error of nonnull aspheric testing is analyzed in detail with conclusions that retrace error has much to do with the aperture, relative aperture and surface shape error of the apsheric under test.

分析了非球面非零位检测系统中的回程误差问题，得出了回程误差与被测非球面口径、相对口径以及非球面本身面形误差均紧密相关的结论。

As for the super error correction, are similar, not necessarily like super error correction, and some manufacturers to increase the error-correcting power skinhead very good life would be affected.

至于超强纠错都是吹牛的，都差不多，不一定超强纠错就好，有些厂家把光头功率调高了纠错就很好，寿命就受影响了。

Then a mixed-programmed method based on MATLAB and VB was introduced to simulate the shafting error model, and the error model was proved by comparing the simulating and calculating result with the spherical trigonometry method, which provides reference for precision analysis and error correction.

采用MATLAB与VB混合编程的方法对该误差模型进行了仿真分析，通过比较仿真结果与单项误差法计算的结果，验证了该轴系误差模型的正确性，为光电经纬仪的精度分析和误差修正提供了参考。

The matter that statistical error produces is very complex, error sort is various, consequently, the control of statistical error is a very complex project.

统计误差产生的原因十分复杂，误差种类繁多，因而，统计误差的控制是一项非常复杂的工程。

As the existence of qualitative calculation error and statistical error, we have to use the qualitative analysis to examine the scientific nature and effectiveness of the work, making sure to reduce the error of qualitative calculation.

由于在定量计算中系统误差和统计误差的存在，为此在定量分析之后，都有相关定性分析加以分析和解验，以求研究工作的科学性和有效性。

The parameters are tangent vector error, the radius of curvature error and focusing error.

对光线追迹方法的研究，给出光路计算公式和基本流程图。

To improve the pointing accuracy of the telescope mount and the capability of daylight tracking, it is necessary to do more study on the error of telescope axes. The present thesis analyses many kinds of factors that cause the pointing error of telescope mount, and discusses the method for correcting the pointing error by setting up telescope mount model in detail.

本文详细分析了望远镜机架指向产生偏差的各种因素，讨论了通过建立望远镜机架指向误差模型的方法来修正望远镜机架指向误差的方法，通过使用CCD观测恒星来求解望远镜机架指向误差模型参数。

Fist, comprehensive analysis on the current study on data processing is made, and characters of Newton methods about nonlinear surveying and mapping data processing are discussed, and then new solutions to parameters estimate with multi-sources, multi-types, multi-dimension, multi-precision bynonlinear least square are presented such as PSB algorithm, digital continuation and generalized digital continuation algorithm, cone model method, tensor analysis method, GCMA(mixed algorithm of gradient method and conjugate gradient method), combining algorithm based on Newton method and gradient method and confidence region and so on, and a new fast difference iterative algorithm is proposed towards parameters estimation containing random parameters in nonlinear models, and a new solutions to nonlinear least squares surveying and mapping adjustment by parameters estimation both considering the random and nonrandom parameters is presented after studying on nonlinear data processing in deformation monitoring, and at last primary analysis on error propagation of spatial data is made and approximate error propagation formula and error analysis formula to length and area are proposed.

首先比较全面分析了目前测量数据处理理论的研究现状，讨论了牛顿类方法在处理非线性模型参数估计方面的特点，研究并给出了求解多源、多类型、多维、多精度、非线性最小二乘测量平差参数估计的若干种新方法，这包括PSB算法、数值延拓及其广义数值延拓算法、锥模型法、张量分析法、基于最速下降法和牛顿法的组合算法、基于最速下降

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。