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  by random
     The experimental results show that:in comparison to the traditional equivalent linearization method,the new way given in this paper can solve non-linearity problem effectively,it can be widely applied in a variety of non-linearity system,and a non-linearity system analysis excited by random vibration signal is proceeded.
     实验结果表明:和传统的等价线性化方法比较,提出的新方法解决非线性问题更有效,可广泛地应用于各种非线性系统,进行由随机振动信号激励的非线性系统的分析.
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     In the length of 107.30 m,about 59.3% of the space heterogeneity of the powder sand is caused by random factors,and 40.7% by the space autocorrelations and the rest space heterogeneity is rarely caused by random factors,but by space heterogeneity of autocorrelations.
     在于107.30 m范围内,粉沙约有59.3%的空间异质性由随机因素引起的,而由空间自相关部分引起的空间异质性占40.7%; 其余的空间异质性很少由随机因素引起的,其空间自相关部分引起的空间异质性占绝大部分。
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     The approach is to combine Random Decrement Technique with Polyreference MDOF Method. More than one set of free responses are obtained from stationary random responses of the structure by Random Decrement Technique.
     提出了把随机减量法和多参考点复指数时域法加以结合,由随机减量法从结构平稳随机响应中得到多组自由响应,用多参考点复指数方法同时处理这些自由响应,以识别出模态参数.
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     (3) Fuzzy rough set model based on random set on dual universes is proposed. It gives a way to deal with the uncertainty problems that knowledge in knowledgebase is fuzzy and gained by random reasons, and the described object is also fuzzy.
     (3)引进随机集的选择函数,给出了双论域上基于随机集的模糊粗糙集模型,用来解决知识库中的知识是由随机原因得到的、模糊的并且被描述的对象也是模糊的粗糙近似问题。
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     The spatial variability of organic matter,available N,and available K was mainly caused by structural factors and that of available P was primarily caused by random factors.
     有机质、水解氮和速效钾的空间变异主要是由结构性因素引起的,速效磷的空间变异是由随机因素引起的。
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  a stochastic
     In this paper,the identification problem of stochastic multivariable continuous-time system which is described by a stochastic vector differential equation is discussed.
     本文讨论了由随机向量微分方程描述的多变量连续系统的辨识问题。
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     The voice excitation is composed of a stochastic codebook and an adaptivecodebook,and the vocal tract is formed by the linear prediction filter.
     激励由随机码本和自适应码本构成,声道由线性预测器构成。
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     The learning process of a neural network is considered the process in which neural network variables are changed with a time series of input signals generated from a stochastic information source.
     根据该理论,学习过程就是由随机信息源产生的输入信号驱动神经网络参数不断修改的过程;
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     Aim\ A method to estimate the variance of the initial input data of the inverse problem in one realization of a stochastic process is proposed.
     目的 为了满足正则化方法求解反问题之需要 ,提出了一种由随机过程的一次物理实现估计原始数据方差的新方法 .
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     The upper level problem seeks to minimize the total network cost, while the lower level problem is a stochastic user equilibrium transit assignment model with capacity constraints.
     在一定的公交网络收费结构下 ,乘客在网络上的流量分布可由随机用户平衡分配模型进行估计 .
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  “由随机”译为未确定词的双语例句
     Let{X(t),t∈R+}be a 3-ple Markov Gaussiam process given by X(t)=(t-u)~2dB (u),where{B(t),t∈R_+}is a normalized Brownian motion Process having E{X(t)}=0 and E{B(s)B(t)}=min{s,t}.
     假设{X(t).t∈R_+}是由随机积分(t—r)~2dB(r)所确定的三重马氏过程,这里{B(t)}是规范化的布朗运动过程.
短句来源
     MTS changed their orientation in the cortical cells of the zone of cell division from being randomly oriented to transversely oriented when incubated in 1 mg/L 2,4_D for 1 h.
     1mg/L 2 ,4 D处理 1h ,分生区细胞微管由随机排列变成横向排列 ;
短句来源
     These values were 9.90% for soil organic matter,8.80% for total N,0.26% for total K and 17.10% for total P respectively.
     各土壤养分由随机因素引起的空间变异占空间总变异的比例小,其值分别为9.90%、8.80%、0.26%和17.10%。
短句来源
     The apparent activation energyof the first stage is23.32kJ/mol.
     第一阶段的表观活化能为23.32kJ/mol,遵循Avrami-Erofeev方程,由随机成核步骤控制裂解反应。
短句来源
     The apparent activation energies of the first and the second stage are (208.38) kJ/mol and (339.89) kJ/mol, respectively.
     第一阶段在420℃~610℃区间,裂解活化能为208.38kJ/mol,由随机成核步骤控制裂解反应。
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  by random
The genetic variation of 46 individuals from the population remaining at Pingba (Guizhou Province, China) was assessed by Random Amplified Polymorphic DNA (RAPD) finger-printing.
      
The results show the concentrations calculated by the two models are quite close except that the plume area calculated by Random Walk is a little smaller than that by RIMPUFF.
      
In this paper, consideration is given to the stationary point-cycle bifurcation in nonlinear dynamical systems affected by random perturbations.
      
Their analysis suggests that variability of PKPI-B encoding genes in potato is limited and could be explained by cross-hybridization events in the ancestor forms rather than by random mutagenesis.
      
Random flows generated by random processes (properties of random flows, level-crossing problems)
      
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  a stochastic
We develop a method to estimate the power spectrum of a stochastic process on the sphere from data of limited geographical coverage.
      
This paper analyzes the aritrage-free security markets and the general equilibrium existence problem for a stochastic economy with incomplete financial markets.
      
This paper studies a stochastic endogenous growth model with pollution.
      
This paper deals with the problem of maximizing the expected utility of the terminal wealth when the stock price satisfies a stochastic differential equation with instantaneous rates of return modelled as an Ornstein-Uhlenbeck process.
      
A Stochastic Deterministic Model Predictive Control: Its Accuracy
      
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This paper gives us a brief introduction to the complex channel analysis which aims at obtaining the dynamic parameters with the characteristics of surface seismology, such as transient amplitude, transient phase, transient frequency and apparent reflected polarity. It is of great significence either in interpreting the oil-gas reserves and obtaining the lithologic information.

本文概述了复数道分析的目的在于求取表征地震波动力学特征的一些参数——瞬时振幅、瞬时相位、瞬时频率和视反射极性。这对解释油气藏和获取岩性信息有重要意义。 要获得较好的参数剖面,必须正确选择和改进某些计算公式,正确使用合理的处理方法。本文通过对合成记录的处理说明,对瞬时振幅做积分滤波处理可得到光滑可靠的瞬时振幅剖面,并可大大消除由随机干扰造成的假视极性。用反正弦公式代替常用的反正切公式求取瞬时相位,可获得与地震波周期一致的相位剖面,克服了相位畸变。利用经过积分滤波的瞬时振幅对瞬时频率做加权处理,可使瞬时频率更加稳定。 本文借用有限元素表示的射线轨迹法,在6912计算机上对一种常见的构造地质模型作了合成记录,用它计算了瞬时振幅、相位、频率和视极性剖面;分析了这些剖面的特征以及利用这些特征进行地震解释的可能性。 本文还对形成复数道的基本算法——离散希尔伯特变换的各种改进算法进行了比较,计算结果表明,在频率域中做希尔伯特变换较为有利。

In this paper, the random drift rates, sampled at equal time intervals, of a two-degree-of-freedom floated gyro are processed and analysed, employing 601 data points of random drift rates both about the horizontal axis and azimuth axis. In addition, the mathematical model of them is being identified roughly. The result of this investigation shows that:

本文对一个两自由度液浮陀螺以等时间间隔抽样取得的绕水平轴和方位轴的随机漂移率数据各601个,进行丁处理和分析,并对它们的数学模型作了初步的识别.分析结果表明:a.陀螺随机漂移率的自相关函数是由非平稳的斜坡函数和平稳的马尔柯夫过程组合而成.b.一次差分后的陀螺随机漂移数据是正态分布的.它们可以分成两部分:一部分是平稳的随机过程,而另一部分是由随机游动及滑落所组成的非平稳过程.

On the basis of the set theory, a method for determining random samples of zero-up-crossing, monogamy of wave height and wave period, maxima and minima of surface wave obtained from a continuous observation of random surface waves is proposed.

本文根椐集合论提出了一个由随机波动连续记录确定上跨零点,一一对应的波高、波周期,波面极大、极小值等一元及二元随机样本系列的方法.根椐实测资料对非线性不规则波概率模型—推广正态分布、波面极值及其截尾正极值的统计分布进行了检验,讨论了推广正态分布的参数估计方法.

 
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