查询词典 approximation method

Then, the stochastic approximation method is applied to determine the optimal control parameters.

应用扰动分析法得到性能指标对控制参数的灵敏度估计，并证明了估计的无偏性，又利用随机逼近技术优化控制参数。

Detection and control of eccentricity in a cold mill based on stochastic approximation method

性质：又称大小头。化工管件之一，用于两种不同管径的联接。

The problem of pricing American options using the quadratic approximation method with stochastic volatility and jumps is considered in the second part of the thesis.

而论文的第二个部分是研究随机波动模型如何扩展到美式选择权上的应用，考虑在可能提早履约的情境下，标的物之随机波动性与代表突发冲击事件之跳跃模式，如何来影响提早履约溢酬的问题。

Firstly, by use of the successive approximation method and a series of classical estimates, the local existence and uniqueness of weak solution are proved.

利用逐次逼近方法和一系列经典的估计，证明了弱解的局部存在性和惟一性。

Any order approximate solution of the equation was presented, and its convergence was mathematically proved by the successive approximation method.

采用逐次逼近法，求得任意阶近似解，并证明解的收敛性。

In order to determine flood discharges in rivers without any previous hydrometric record, estimation according to its trace is the only approximation method that is comparatively reliable.

工程设计中，欲在未经水文测验的河流上定出设计用的洪水流率，依据洪水痕迹估算是唯一此较可靠而近似的方法。

In order to determine flood discharges in rivers without any previous hydrometric record, estimation according to its trace is the only approximation method that is comparatively reliable.

工程設計中，欲在未經水文測驗的河流上定出設計用的洪水流率，依据洪水痕跡估算是唯一此較可靠而近似的方法。

Most of hob design for non-involute gears are nowadays taken by approximation method.For example,the normal sectional profile of hob worm therad is usually regarded approximately as its basic rack profile.Recently, some new methods have been developed in this respect but, perhaps, they appear overelaborate since the principle of spacing engagement is based on. For this reason , the paper offers a new design procedure for hob worm based on the planar engagement principle with the intention of simplific...

本文应用平面啮合原理精确设计各种非渐开线齿轮滚刀的基本蜗杆，提出并应用啮合线的投影原理从工件齿轮端截面的啮合线直接求得刀具蜗杆的端面齿形，而不必求出媒介齿条的齿形，方法很简单，还从啮合线的投影原理简明而形象地证明了一对螺旋齿轮直接啮合过程的啮合线是一条垂直于齿向的平面曲线。

The acceleration profile of the crane motion is designed to induce minimum payload pendulation during transpo rt,while the deceleration stage is designed to ensure freed om of residual oscillation near the end of the transport,and to deliver the payload at the target point.The techniques induce payload pendulation at least one half ofan oscillation cycle or integer multiples during each of the acceleration and deceleration stages.Starr(1995)designed a symmetric two-step acceleration and deceleration profile to transfer a suspended object.The duration on the constant acceleration steps is assumed to be negligible relative to the period of the payload oscillation.A linear approximation method of the oscillation period is used to generate the two-step symmetric acceleration profile.

3.1投入成型技术，各种形式的投入shapers ， convolved参考命令，产生形投入指挥，驾驶起重机提出一套距离沿一套path.the加速度概况起重机议案旨在诱使最低载重pendulation期间transpo rt ，虽然减速阶段，目的是确保freed om残余振荡接近尾声的运输，并交付载荷到达目标point.the技巧诱使载荷pendulation至少一半ofan振荡周期或整数倍数。

The Fourier approximation method is applied to solving wave height and wavelength problems of waves shoaling、for providing a normalization concept. We normalize the waves scope of depth and deep water to breaking depth into the range of 2~1. Finally、we check the experience formula computations.

中文摘要本文利用富立叶近似法解析波浪浅化过程中波高及波长的变化，并提出正规化水深之概念，将波浪存在之水深范围，深水至碎波水深正规化为2~1后，进行经验公式的推求。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。