查询词典 continuous dynamical system

Neutral network is a highly non-linear dynamical system. It has the ability of dealing with parallel distribution, and has high robustness and the abilities of fault tolerance, distribution memory and learning.

神经网络是一个高度非线性动力学系统，具有并行分布处理能力、高度鲁棒性和容错能力、分布存储及学习能力。

In particular, the sufficiency implies a recent result by Akashi: every compact and totally disconnected dynamical system, expansive or not, can be conjugately embedded into a PSDS.

第五章主要给出了一个动力系统可以拓扑共轭嵌入到乘积符号动力系统中的充要条件，而且证明了该条件蕴涵着Akashi在文[2]中给出的主要结论，并由该条件推出了判断一个拓扑空间完全不连通的充分条件。

In many practice problems such as to know the resonnance frequency of a structure and to know the critical value for the stability of a dynamical system,often need to compute the eigenvalues of a symmetric matrix. The chief method to compute the eigenvalues of a symmetric matrix is first to transformate the matrix to a symmetric tridiagonal matrix similarly and orthogonally, then to use the QR method with shift to the symmetric tridiagonal matrix.

很多实际问题，如求结构振动的固有频率，动力系统稳定性的临界值等常常归结为计算对称矩阵的特征值，而首选的计算方法是先把该矩阵正交相似变换成一个对称三对角矩阵，再对这个对称三对角矩阵用带位移的QR方法。1968年J.H。

If a family of time series of the unbeknown nonlinear dynamical system can only be got, how to identify the change of motive properties at different parameters?

若仅知未知系统的系列时间序列，如何识别系统运动性态的变化？

In this paper we have studied the Upper bound for the time derivative of information entropy for a dynamical system driven by colored cross-correlated colored noises. The Fokker-Planck equation was obtained by using the unified colored noise approximation. The upper bound for the rate of entropy change can be calculated explicitly based on the definition of Shannon's information entropy and the Schwartz inequality principle.

" T！ z2 r" j0 S0 F5 J* T 摘要：本文研究了一种由色关联乘性和加性色噪声驱动的随机耗散动力学系统随时间演化的熵变化率上界，通过统一色噪声近似方法给出了该系统的近似Fokker-Planck方程，然后结合Shannon信息熵的定义及Schwartz不等式原理给出了该系统经近似后熵变化率上界随时间演化的精确表达式。

In chapter one, the computational methods for the weak intermolecular interaction and the development of dynamical studies for the He-LiH system are briefly introduced.

第一章简述了分子间弱相互作用的理论计算方法，以及He-LiH体系动力学研究现状。

The analysis results show the effect of non-symmetry film force, nonlinear stiffness and nonlinear friction force on dynamical behavior of rotor system has great relation with rotation speed. The chaotic behavior could exist in a widder parameter region, and the chaotic evolutive rule is more complicated.

发现非对称油膜力、非线性刚度和非线性摩擦力对转子系统动力学行为的影响与转速有很大关系，碰摩转子系统可以在较大参数范围内出现混沌运动状态，并且混沌运动的演化规律更为复杂。

By making a numerical analysis of the bistable stochastic dynamical systems, we find that the effect of an input sinusoidal signal is also a sinusoidal signal in the output, and the effect of the white noise is a Wiener process. When the system parameters are small enough, the coupling effect between the sinusoidal signal and the white noise can be largely weakened.

随机共振是双稳系统在周期信号和噪声的作用下表现出来的非线性现象，当系统的非线性与信号和噪声之间存在某种匹配时，通过对系统施加适当强度的噪声，可以提高系统对信号的响应，系统输出的信噪比对噪声强度表现出一峰状曲线[11] 。

Methods By using the Weili WLJY-9000 color spermato- zoa examination system, we carried out routine semen measurement to acquire accurate sperm density and other dynamical indices.

方法采用wLJY-9000伟力彩色精子检测系统，用动态学分析系统进行精液常规分析，以精确测得精子密度和其他各项动态学指标。

When agreeing with higher education target when these elements, can bring tremendous dynamical; to higher education system conversely, when these elements conflict each other, with respect to the development of can cloggy higher education.

当这些因素都和高等教育目标一致时，就会给高等教育系统带来巨大的动力；反之，当这些因素相互冲突时，就会妨碍高等教育的发展。

I had a lovely dog named PiPi, he was one of my best friends.

我曾经有过一只小狗，它的名字叫皮皮，它很善良，它是我最忠实的朋友。

Newly ovulated mouse oocytes were cultured in the CZB medium supplemented with different concentrations of pyruvate before treated for activation or assayed for MPF activity.

我们猜测卵母细胞在不含丙酮酸的条件下老化的更快，并且卵丘细胞可能通过消耗不含葡萄糖的CZB中的丙酮酸从而促进卵母细胞老化。