1) random wave
随机波
1.
In order to investigate the mechanism of instability and failure of the deeply embedded large cylindrical structure under random waves, wave flume experiments with different wave conditions were carried out and the corresponding dynamic earth pressures on the structure were measured.
为探究随机波作用下沉入式大圆筒结构的失稳破坏机理 ,文章进行了不同波浪条件下的随机波水槽实验并测取了结构表面的动土压力时程 ,通过在时域和频域的综合分析并结合结构的实际失稳状态 ,文章对沉入式大圆筒结构的失稳破坏机理进行了探索和阐释。
2.
Considering comprehensive effects of wave shoaling,refraction,diffraction,reflection and breaking,an improved numerical simulation model is proposed to compute the random wave propagation and transformation with the introduction of Wen s frequency spectrum.
考虑波浪的浅水变化、折射、绕射、反射和破碎等现象的影响,以文氏谱作为输入谱,建立了浅水区域随机波浪传播变形的改进数值模型。
2) Random waves
随机波
1.
Simulation of ship maneuvering motion in random waves
船舶在随机波浪中操纵运动预报
2.
The second order solution of random waves is obtained.
求出了二阶随机波的解,讨论了同一水平位置自由面高度的时闻相关函数和二阶谱。
3) random fluctuation
随机波动
1.
To describe the characteristic of turbulence as 3D transient phenomenon with random fluctuations which is highly nonlinear, turbulence modeling ranging from approximate to highly rigorous was proposed.
为了准确描述湍流三维非稳态随机波动这一高度非线性的特性,简述湍流物理现象的特点,引出基于不同角度建模的湍流模型,在理论上对大涡模拟进行分析,并运用并行计算机、FLUENT6。
2.
The statistical method focuses on considering the distillate of soil variability by separating the certain component that can be depicted by the function of trend and the disturbance component that can be characterized by the random fluctuation efficiently.
结果表明:土性指标变异性并非土体分层后层与层之间土性指标的差异,而是层内土性点与点之间的空间变异;相对于传统随机变量的建模方法,这种空间变异性用随机场理论建模更加科学合理;随机场理论用空间趋势函数和随机波动分量分别表征土性指标的确定性部分和随机扰动部分,通过去趋势化处理,可把握土性参数不确定性的核心;实例分析显示,本文提出的方法可更加精确地了解土性参数的不确定性,为可靠性理念在实际工程中的应用提供有利的途径。
4) random wave
随机波浪
1.
Dynamic response analysis model for large diameter cylinder breakwater under the action of random wave;
随机波浪作用下大直径薄壁圆筒防波堤的动力分析模型
2.
Study on bottom shear stress of laminar boundary layer under the action of random waves;
随机波浪作用下底部层流边界层剪应力谱的研究
3.
Experimental research on random wave impact on three-dimensional structure in splash zone;
随机波浪对浪溅区三维结构物冲击作用试验研究
5) random waves
随机波浪
1.
The hydrodynamic characteristics and the pile grouping effect of the transverse forces on three piles in side-by-side arrangement and tandem arrangement are experimentally investigated in random waves and the relations between the transverse coefficients and KC number and 1/D are given in this paper.
本文试验研究了随机波浪作用于串列及并列三桩桩列上的横向力的水动力特征及组成桩间的群桩效应，给出了横向力系数与ＫＣ、ＬＤ两参数的相关曲线。
2.
The spectral densities of nonlinear random waves, the velocities and accelerations of water particles are obtain.
首先将波面方程、海水质点水平速度用一阶波面分量的非线性组合表示 ,应用平稳随机过程高阶矩的降阶计算法则 ,得到了波面方程及海水质点水平速度与一阶波面分量的自相关函数之间的关系 ,从而确定了Stokes随机波浪的波浪谱密度及海水质点水平速度和加速度谱密度 ,进而求得有关波浪要素的均方根值。
3.
The random waves, non-linear damp and ship non-linear restore moment are taken into consideration and the ship rolling non-linear differential equation is established.
本文考虑随机波浪及船舶的非线性阻尼、非线性恢复力矩,建立船舶横摇运动的非线性微分方程。
6) stochastic volatility
随机波动
1.
Basing on the theory of system,epistemology and of feedback control,a new security pricing model-stochastic volatility pricing model(SVPM) with jump and feedback,is proposed by amending a defect lying in the original models that neglect the important events happened frequently in financial markets,and by importing the interaction between investors and security price.
基于系统论、认识论、反馈控制论,在传统随机波动价格模型的基础上,通过修正其忽略“现实金融市场中,大事件发生比较频繁”这一事实的缺陷,同时引入证券投资者与证券价格之间的交互作用,提出一种新的证券定价模型——带跳及反馈的随机波动模型。
2.
A stochastic volatility model is established.
在证券价格服从随机波动过程下 ,研究了自融资策略下的最优证券组合问题 ,得到了相应的最优投资组合及其效用的解析表达式 。
3.
Analyzing the characteristics of financial data and pointing out the drawbacks of GARCH models,the paper describes the volatilities of daily stock return by stochastic volatility model and employs GMM to estimate the parameters in the model.
通过对金融资产时间序列数据特点的分析,指出GARCH模型在描述金融资产时序数据的局限,尝试用随机波动模型刻画股票收益的波动规律,采用GMM方法估计模型参数,并以上海证券交易所综合指数日收益率数据为样本,对沪市指数收益波动进行实证研究,探讨涨跌停板制度对股市波动的作用。
补充资料：随机数和伪随机数
随机数和伪随机数
random and pseudo-randan numbers
随机数和伪随机数【喇间佣1 al川牌”山一喇闭..m.山娜;cJI了，a如曰e”nce，口oc月卿成.以叹“c月a】 数亡。(特别，二进制数:。)，其顺序出现，满足某种统计正则性(见概率论(probability Uleory)).人们是这样区别随机数(mndomn切mbe比)和伪随机数(PSeudo一mn由mn切mbe岛)的，前者由随机的装置来生成，而后者是用算术算法构造的.总是假设(出于较好或较差的理由)所得(或所构造)的序列具有频率性质，这些性质对于具有分布函数F(z)的某随机变量心独立实现的一个序列来说是“典型的”;因此人们称作根据规律F(习分布的(独立的)随机数.最经常使用的例子为:在区间【O，l]上均匀分布的随机数亡。，尸(亡。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条