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abscissa of uniform convergence相关的网络例句

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与 abscissa of uniform convergence 相关的网络例句 [注:此内容来源于网络,仅供参考]

A differential difference type adaptive law and an adaptive iterative learning controller are constructed to ensure the asymptotic convergence of tracking errors in the sense of square error norm on the finite interval, by introducing a Lyapunov-like function, a sufficient condition of the convergence of the method is given.

通过引入微分-差分自适应学习律,设计了一种自适应控制策略,使得跟踪误差在一个有限区间上的积分渐近收敛于零;通过构造Lyapunov-like函数,给出了闭环系统收敛的一个充分条件。

Hence we first propose a globally optimized random search algorithm and prove its asymptotic global convergence; then to improve its convergence velocity and reduce implementation complexity, we propose a practical sub-optimal random search algorithm and analyze its implementation complexity.

为此本文首先给出了一种用于OFDM符号估计的全局最优随机搜索方法,并证明了其渐进全局收敛特性;同时为了改进全局最优的随机搜索算法的收敛速度和实现复杂度,提出了一种可实现的次优的随机搜索算法,并结合实现分析了所提的次优随机算法的计算复杂度。

We introduce the general sigma point selection framework, and give two kinds of efficient methods: a reducing the computing complexity by decreasing the number of the sigma point; b scaling the sigma points to influence the effects of the higher order moments, then improve the accuracy of the UT; c Convergence analysis of the UKF, when used as an observer for nonlinear deterministic discrete-time system, is presented. Based on the UKF that captures the posterior mean and covariance accurately to the second or third order term (in terms of Taylor series expansion) for any form of nonlinearity, sufficient conditions to ensure local asymptotic convergence are established.

论文介绍了sigma点的一般选取规则,并给出了两种有效的方法:a通过减少sigma点集合的元素的数目来减少计算复杂度,b通过增加参数来逼近泰勒展开的高阶项,从而提高UT变换的精度;c论文研究了UKF算法应用于非线性确定性离散时间系统时的收敛性问题。

Though comparing Canny operator and center B spline dyadic wavelet, the following conclusion is proven in this dissertation: a Center B spline function has tight support and Canny operator hasn't. b Center B spline function asymptotic convergence to Gaussian function and the derivative of Center B spline function asymptotic convergence to Canny operator. c The derivative of fourth order center spline B function is more suitable as a optimal edge detector than Canny operator. d Center B spline function can balance the smoothing and approximation of original data, and the fourth center B spline function is the only optimal solution of two order smoothing problem. e The error between the valve of time-frequency uncertainty of the fourth center B spline function and the lower bound of time-frequency uncertainty does not exceed 0.143% of the lower bound. f The derivative of center spline B function can construct a stability dyadic wavelet and can give a fast algorithm for multiscale edge detection, but Canny operator can do neither.

作者给出了Canny算子与中心B样条二进小波严格的比较证明,得出如下结论:a中心B样条函数具有紧支集,Canny算子不具有紧支集。b中心B样条函数的极限收敛于高斯函数,中心B样条函数的导数收敛于Canny算子。c四阶中心B样条函数的导数比Canny算子更接近最佳边缘检测滤波器。d中心B样条函数比高斯函数更能兼顾对原函数平滑和逼近的折中要求,并且四阶中心B样条函数是二阶逼近问题的唯一最优解。e四阶中心B样条函数的时频测不准关系值与时频测不准关系下界的逼近误差不超过0.143%。f中心B样条函数的导数可以构成稳定的二进小波,存在快速的多尺度算法;而Canny算子不构成稳定的二进小波,无法给出快速的多尺度算法。

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。

Firstly, convergence condition of a binomial is discussed, and along with the calculating formula of region of convergence, the matching band of fractance circuit attained by binomial expansion method is indicated definitely.

首先讨论了二项式的收敛条件,并结合收敛域的计算公式,明确指出使用二项展开法所得到的分抗电路的逼近带范围。

FR conjugate gradient methods with perturbations are proposed. The global convergence property of the first method is proved under the condition of main directions' sufficient descent. Whereas, in the proof of the convergence for the other two methods, we only need main directions' descent. Importantly and quite interesting, boundedness conditions such as objective function being bounded below, boundedness of level set are not needed. Chapter 5 presents a version of Dai-Yuan conjugate gradient method with perturbations.

在主方向充分下降的条件下证明了第一个方法的全局收敛性,而后两个方法的收敛性是在主方向下降的条件下证明的,这些收敛性证明的一个共同特征就是不需要目标函数有下界或水平集有界等有界性条件,第5章采用Wolfe或Armijo步长规则提出了带扰动项的Dai-Yuanabbr。

Based on present work of genetic algorithms, the arising process of incest and premature convergence is discussed. The operating efficiency of genetic algorithms is analyzed from different view of points, and the conclusion is drawn from the analysis that there exists a lot of caducous operation during the evolution in the case of premature convergence.

在遗传算法现有研究成果的基础上,讨论了近亲繁殖和早熟收敛的产生过程,并从不同角度对遗传算法的操作效率进行了分析,得出在早熟收敛的情况下遗传操作存在大量无效操作的结论; 3。

However,authors still do not find the relevant references on convergence and symmetric problems of the semi-analytical solution.Based on the semi-analytical solution for Hamilton canonical equation theory,the formulations of the clamp and simply supported and symmetric boundary conditions on the Hamiltonian element are derived by the variational principle.Several numerical examples show that with increase of meshes,the convergence rate of the semi-analytical solution is faster than the convergent rate of traditional finite element method based on displacement.

①在厚度上没有任何位移和应力模式的假设,由于传递矩阵方法的引入,从理论上讲,不受板壳厚度或层合板壳层数的限制;②采用弹性力学的Hamilton正则方程半解析法,可以克服边界的局部化效应[8];③由于在平面内或圆柱壳的曲面内采用了有限元法,所以一般的板壳问题不受结构侧面边界条件的限制,在复杂工程板壳问题上具有广泛的应用领域。

SIP modularity and SOC have important effects on 3C industry convergence. Modulization, industry convergence not only change the base of production structure but also the ...

模块化、产业融合不仅使生产结构基础改变了,竞争的基础也发生了转变,使企业之间的合作与竞争都达到了极致,这集中表现为企业之间的合作竞争,而企业之间的竞争又分为两个层面:设计规则的标准竞争和模块供应商之间激烈的"背对背"竞争。

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The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他,我不喜欢他的这种性格。

As we know the price of traditional product is composed of the cost and the profit of the company involving market competition, monopolizes and many other factors.

我们知道作为传统的商品,定价的模式往往是在成本的基础上增加厂商的预计利润而形成其价格,当然也要考虑到市场竞争、垄断等其他方面的因素。