查询词典 parametric estimation

Based on the Bouc-Wen model, the parametric identifications of nonlinear structures are completed in this paper.

本文基于Bouc—Wen模型，对结构的参数识别问题，进行了一系列研究。

Numerical simulations and analytical results show: in longitudinal and oblique seas, ship may be subjected to primary parametric resonance with large roll amplitude and even capsizing, when encounter frequency is near the twice of roll natural frequency, wave length and ship length are of the same order and the wave height is larger than a certain value; in oblique seas, ship roll motion is a forcedly-parametrically excited oscillation, primary resonance occur as the encounter frequency is near the roll natural frequency, which may lead to large rolling and capsizing too.

数值仿真和解析分析结果表明：在纵浪和斜浪中，当遭遇频率接近船舶横摇固有频率的两倍，波长和船长接近，波高超过某一阈值的时候，船舶会发生主参数共振，产生大幅横摇甚至倾覆；在斜浪中，船舶发生的是参强激励横摇运动，遭遇频率接近横摇固有频率时，还会激起横摇主共振，同样会产生大幅横摇甚至倾覆。

Primary parametric resonance of a parametrically excited simply supported thin rectangular plate on nonlinear elastic foundation is analyzed.

分析非线性弹性地基上受参数激励小挠度矩形薄板的主参数共振问题，由冯卡门方程和伽辽金方法得到系统的非线性振动方程，它是杜分-马休型方程，应用非线性振动的多尺度法得到平均方程。

Numerical results showed that estimators of percentiles from the proposed approach are robust to the parametric models lacking information on the original response distribution.

模拟和实例结果表明，在无感度分布模型的信息时，使用该方法所得分位点的估计是稳健的。

Application of uniform free resolutions shows what family of polynomials with parametric exponents is good.

一致性自由分解的直接应用表明什么是好的带指数参数的多项式组。

The results of this method agree well with the theory data. On the same time, the present method costs much less than numerical methods. In a whole, it is applicable to the parametric design for the heat shield of projectile.

采用这种方法计算出的表面热流、温度与理论值吻合较好，而计算效率又远远高于纯数值方法，适合于弹头防热方案的初步设计阶段。

ABSTRACT As one of the key techniques of the new generation CAD system, the featurebased parametric CAD has been becoming the current resea...

作为新一代CAD系统的关键技术之一，基于特征的参数化技术已经成为当前的一个研究热点。

Parametric equalizer: center freq, bandwidth, gain.

参数均衡：中心频率，带宽，增益。

It is show that the proposed scheme is robust for systems with parametric uncertainties and unstructured uncertainties.

理论分析和仿真表明了该文算法对系统的参数不确定性和结构不确定性具有一定的鲁棒性。

Based on the fog droPlet spectra obtained at Zhou Shan Archipelago in 1985, the coefficients of Parametric formulae about visibilities and extinction coefficients in fogs are determined.

应用实测的舟山海雾滴谱资料，计算了雾能见距离与光衰减系数参数化公式中各系数的值。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。