Determine input equivalence classes, boundary value analyses, error classes. 确定输入等价类、边界值分析和错误分类;
The numerical solutions of cut-off frequency in two dielectric layered waveguides by using boundary element method an error estimate of BEM to biharmonic equation 求解平面双调和方程边界元法的误差分析
The first boundary error has to be weighted by rotations and second by displacements. 第一个边界误差要用转角来加权,而第二个则用位移来加权。
By using a ruled surface to approach a freedom surface, the problem of getting the boundary is solved, and the error arising from tool paths'computation is avoided by the algorithm. 该方法有效解决了直纹面逼近的曲面边界问题,并通过对叶片偏置面的直纹逼近从根本上避免了刀位轨迹计算时误差的产生。
By introducing the H_ ∞ tracking performance, a design procedure is derived and the upper boundary of the estimation error is inferred, too, which is irrelevant from the parameter to be designed. 同时引入H∞跟踪性能指标,给出了观测器的设计过程,得到了估计误差的上界,并且该估计误差的上界与所设计的待定参数无关。
The boundary of the tracking error is guaranteed. Then, by using the technique of input-output linearization, the stable adaptive control method for general nonlinear systems is proposed. 然后利用输入输出线性化方法,给出广义非线性系统的自适应控制方法;
Effects of Boundary Point Error for Area Accuracy 界址点误差对面积精度的影响
By calculation and analysis, the conclusions may be reached that the boundary discretization error for the quadratic boundary elements is evidently lower than one for the linear boundary elements, and the upper limit of boundary discretization error in 3D is the same as one in 2D. 通过计算分析可以看出,二次边界单元明显地优于线性边界单元,二维与三维情形的边界离散误差上限是相同的。
Boundary envelop of error model to linear entity is not only of the importance for GIS positional uncertainty theory research, but also the critical indicator for GIS positional uncertainty visualization research. 线状实体误差模型包络线既是GIS位置不确定性研究的重要内容,又是GIS可视化研究的关键指标。
Introducing boundary comparing error into determing the tooth number of gear 引入边界相比误差确定齿轮齿数
In this paper, we studied a developing equation on time discretization with initial and boundary problem. So we may change it into an elliptic boundary problem, and get the error estimation of its approximating solution. 研究了一类带初边值问题的发展方程关于时间的离散化,从而把它转化为椭圆型边值问题,得到了近似解的误差估计。
The effect of the treatment of boundary condi-tions on the error of numerical prediction 侧向边界条件处理方式对局部地区数值天气预报误差的影响
Block model has been widely used in ore reserves calculating, mine designing and schedule because its processing is very simple and practical, but for most complicate deposit the application effects are far from satisfaction due to the big boundary error. 块段构模技术因构模简单、实用而广泛用于储量计算、开采设计和计划编制,但对于复杂矿体,则边界误差大,应用效果较差,常采用人工修正模型予以修正。
Boundary element methods and error analysis for the solution of elliptic Neumann problem in r~ 2 二维椭圆Neumann问题的边界元解法及其误差分析
The first order absorption boundary condition is applied to the outside boundary, which can avoid the error caused by the plane wave assumption. 在外边界上统一应用适合于人工源的一阶吸收边界条件来形成边值问题,可减小基于平面波假设造成的人为截断边界的影响。
Then considering the time-domain relativity of ECG, we introduce the wavelet packet decomposition on signal from frequency-domain to time-domain. The ECG eigenvector is used for time-domain decomposition, and the boundary error problem in this process is well solved. 在考虑到心电信号在时域上具有的相关性特点后,本文将频域的小波包分解引入到时域,采用心电特征向量的相关性作为时域分解的判据,并解决了时域分解带来的边界误差问题。
In image processing, the wavelet of L2 ( R) will cause distortion on the boundary by truncation error. In order to exterminate this phenomenon, one must modify the wavelet on the boundary. This gives rise to the wavelet on the interval. 在图像处理中,L~2(R)上的小波基因截断误差会在边界处产生失真,为了消除这种边界效应人们需要对其进行改进,这就产生了区间小波的理论。
The paper introduces the concepts of comparing error ed boundary comparing error, and further a computational checking method is approached for applying these concepts to check speed ratio error and revolutional speed error of the machine tool speed changing systems. 本文介绍了相比误差和边界相比误差的要概念,并对这些概念对于机床变速系统中速比误差和转速误差的验算方法进行了探讨。
In this paper, Galerkin approximations of Second order hyperbolic equation is studied with the anisotropic modified rotated Q1-element. By means of integral identities and boundary estimates techniques, the optional error estimation is presented for hyperbolic equation. 运用具有各向异性特征的非协调元(修正的旋转Q1元)对二阶双曲方程进行了Galerkin逼近,通过采用积分恒等式和边界估计技巧,得到了相应的最优误差估计。
The concept of error is not always objective clear-cut. There's not always a distinct boundary between error non-error. 错误的概念并非总是客观、泾渭分明的,在错误和非错误之间并不总是有明显的界限。
The precise time-integration method is proposed for solving four-order rod vibration equation with initial condition and periodic boundary condition. The local truncation error of the method is O(Δ x~ 4). 对于四阶杆振动方程初值和周期边界值问题,提出了截断误差阶为O(Δx6)的精细时程积分法。
A coupling method of difference and boundary finite element and its error estimates for nonlinear parabolic initial boundary value problems 非线性抛物型初边值问题的差分-边界有限元耦合方法及其误差估计
Specially, the effect of boundary error is analysed, and some new algorithms are constructed. 特别分析了边界误差的影响,并构造了一些新的算法。
In some cases, the object contour under observation may be adjacent to some other objects in the background when using Snake algorithm to track moving object. If not be constrained, some control points might be drawn to the background boundary, which result in an error. 用Snake算法跟踪移动目标时,有时会产生目标轮廓与背景中另一些物体靠近的现象,如果不加约束,那么一些控制点将可能因被吸引到背景边缘而产生错误。
At the same time, we discuss the results and make sure that the adaptive boundary element method based on posteriori error estimates are completely feasible, which well validates the efficiency and superiority of them and their extensive application value in practical engineering. 同时以大量的计算及结果讨论证明了以后验误差估计为基础的自适应边界元方法和误差估计方案是完全可行的,进一步证实了其有效性和优越性以及在工程实际中广泛的应用价值。
Firstly, the algorithm chooses patch matching method and the size of patch according to texture features. Then the algorithm considers pixel error, texture structural error and boundary error to improve the structural similarity between matching patch and template patch, thus reduces block effect. 首先根据纹理特征选择块匹配方法和匹配块的大小,并在块匹配过程中综合考虑像素误差、纹理结构误差以及边界误差以提高匹配块的结构相似度,减少块效应影响。
But using the average temperature of cavity surface as boundary condition will cause some error for the heat transfer analysis; this error may affect analysis of the numerical simulation of precision plastic products or thin-walled parts. 但是当以型腔表面平均温度作为边界条件时,将会对传热分析产生一定的误差,这个误差可能对精密注塑件或薄壁制件的数值模拟分析产生影响。
The error finite element model is caused by the assumptions of modeling simplification, the approximate boundary conditions, and the error of physical parameters. 由于建模过程中简化假定、边界条件的近似性、某些物理参数的误差等,都可造成有限元模型的不准确。
Multiscale information fusion halftone method, mixed error measure function of the establishment of multiscale wavelet coefficients fusion to establish the boundary error measure function and improved K-means clustering method to establish the area error metric function. 在多尺度信息融合的半色调方法中,混合误差测度函数的建立是利用多尺度小波系数融合建立的边界误差测度函数和改进的K-means聚类法建立的区域误差测度函数。