To improve the convergence speed of sliding mode variable structure control, a new nonlinear sliding mode surface is proposed. 针对滑模变结构控制的收敛速度问题,提出了一种新的非线性滑模面。
It is pointed out that the strong upward motion associated with surface convergence forced by underlying surface is the trigger mechanism of the torrential rain process. 下垫面强迫所导致的辐合上升运动是这次暴雨过程的触发机制。
The convergence of error brought about by the curvature of earth's surface obviously has no counterpart in free space. 地球表面曲率产生的误差是收敛的,显然,在自由空间没有类似的情况。
The convergence for this method is proved and applied to solve inverse problem of fractal rough surface. 最后将这一算法运用于分形粗糙面的反演问题中,得到了很好的反演效果。
Furthermore, peripheral displacement convergence and settlement of vault and ground surface are monitored on-site. 现场对隧道周边位移收敛值、拱顶下沉值和地表下沉值进行监测。
The forward movement of the tail is in a way of propagation and closely linked with divergence and convergence of near surface flow. 尾部的向前移动方式是传播性的,且与近地层气流的辐散辐合紧密联系。
The convergence on the unit spherical surface in Orlicz space 0rlicz空间单位球面上的收敛性
A fitness scaling technique is introduced into simple genetic alogrithm ( SGA) to improve its convergence performance and an adaptive genetic algorithm ( AGA) is proposed for the stability analysis and the most dangerous slip surface search of broken jointed rock slope. 通过在简单遗传算法(SGA)中引入适应度变换技术改进其收敛性能,提出了节理破碎岩体边坡稳定性分析和最危险滑动面搜索的自适应遗传算法(AGA)。
The computational procedure shows that the method and the measures of the paper have good convergence property and stability, which is independent of selecting of the initial free surface. 计算过程表明,本文方法及措施具有很好的收敛性与稳定性。且收敛性与自由面初始位置的选择无关。
Influence of interaction between the shift of warm pool and that of equatorial convergence zones on atmospheric surface winds fields during 1982/ 1983 ENSO 在1982/1983ENSO过程中暖池和赤道辐合带相互作用对大气表面风的影响
On the convergence of the finite element method for EQUI-VALUED surface boundary value problems 等值面边值问题有限元法的收敛性
Based on the convergence and continuity theories of the non-stationary 4-point interpolation subdivision algorithm, the solution of the object function associated with surface area is calculated as the free parameter in the subdivision algorithm, and then we obtain the needed fairing minimal surface. 在非静态四点法收敛和连续性理论的基础上,通过使细分曲面的面积目标函数极小,反求出所需的参数值,从而细分得到光顺的极小曲面。
The rainstorm forming is closely related to the mesoscale convergence system in surface stream field and meso-β-scale convective system in satellite cloud picture. 暴雨的形成与地面流场上中尺度辐合系统、卫星云图上中β尺度对流系统(MβCSs)等密切相关。
The convergence of a positive linear operator sequence is discussed, and then the basis functions often used in the construction of the free surface are obtained. 考虑了一个正线性算子列的收敛性,并由此得到了在自由形式曲面生成中常见的几种基函数。
Estimation of Convergence of Doo-Sabin Surface Control Meshes Doo-Sabin曲面控制网格的收敛估计
It is the convergence and lifting of the tropical air mass which releases the convective instability and induces the surface moist air rising to the middle troposphere. 降水区域内,中层对流层的大量水份,是由于辐合或抬升的作用,使潜势的对流不稳定性成为现实的不稳定性,而由下层空气上升带上去的。
An algorithm for first order second moment method is presented to improve its convergence, and the nonlinear adaptive approximation algorithm of structural failure surface using two points is discussed and some amendments are made. 首先,针对一次二阶矩法有时不收敛的情况提出了一种改进方法,对两点自适应法拟合失效曲面的算法作了修正;
Effect of Left Ventricular Outflow on Flow Convergence Region on the Left Septal Surface in Ventricular Septal Defect 左室流出道血流对室间隔缺损左室面血流会聚区影响的研究
The axes of low-layer helicity plus center is concurrent with shear line and the convergence line of surface inversion trough. 低层螺旋度大值中心轴线与切变线和地面倒槽辐合线走向一致,高层螺旋度与高空急流有关。
And convergence and equality of solutions is controlled through fitness sharing technique, which makes solutions converge to optimal trade-off surface. 同时通过共享技术实现对遗传操作过程中解的收敛性和均匀性进行控制,使得解朝着最优权衡曲面收敛,从而得到问题的Pareto最优解。
The characteristic of the ternary subdivision scheme is fast convergence speed, and is suitable for the reconstruction subdivision surface of large-scale data set. 三分细分模式的特点是收敛速度快,适合快速构建大规模重建网格的细分曲面。
The Water-tank experiments also confirmed the balance of the land surface side heat convergence and air advection from the ocean to the land surface. 水槽实验也证实了陆面上方热辐合和空气自海洋到陆面的平流之间存在的平衡。
The range-dependent variation of sound velocity resulted by mesoscale eddy and oceanfront can cause the changing of convergence zone structure and the emergence or disappearance of surface duct. 中尺度涡旋和海洋锋面引起声速剖面的水平非均匀性变化,并进一步引起会聚区结构特性的改变和表面声道效应的出现或者消失。
The experiment shows that ternary loop subdivision method is faster in the speed of convergence than binary loop subdivision, and can ensure the smooth of the subdivision surface. 试验结果表明三进制loop细分方法具有更快的收敛速度,且能保证细分曲面的光滑性。
The formation stages: positive vorticity, convergence and vertical wind shear high value area appear at the middle layer and below, surface instability energy increases rapidly, and the maximum updraft and non-divergence level develop to high layer. 上海中尺度对流天气形成阶段的主要特征为中层以下为正涡度、辐合运动和垂直风速切变大值区,底层不稳定能量快速增加;最大上升速度和无辐散层发展至高层。
In monitoring methods, mainly introduced the surface and hole deformation observation, peripheral convergence, vault sink, surface subsidence monitoring technology and settlement standards etc. And the data processing theory were introduced. 在监控方法上,主要介绍了地表下沉、周边收敛、拱顶下沉等监测技术和沉降准则,并对数据处理理论进行了介绍。
We compare of convergence speed and networks output errors of tangent planes to constraint surface algorithm and gradient descent algorithm in the training of neural networks and draw the conclusion that the tangent planes algorithm converges speedily under the same circumstance. 我们比较了梯度下降和限制平面的切平面两种算法在训练人工神经网络时的收敛速度和网络输出误差,得到了在相同条件下,切平面法比梯度下降法收敛得更快的结论。
The results show that, Kriging-GA method has more accuracy but slow convergence than the polynomial response surface methods. 研究结果表明,Kriging-GA优化法较多项式响应面方法的预测精度高,但收敛慢。