查询词典 variable-density system

In this paper, the form invariance of Nielsen equation for variable mass conservative mechanical system was studied.

形式不变性是不同于Noether对称性和Lie对称性的一种新的对称性理论。

The circuit speed and performance are improved due to the new structure. MPEG2 video decoder includes Inverse Discrete Cosine Transformer, Motion Compensation, Variable Length Decode, Inverse Quantization and System Controller etc.

研究了解码器各个功能块VLSI实现的新方法，从电路结构方面进行探索，有效地减小了电路实现规模，而且在速度、性能等方面比文献报道有所提高。

Characteristics of the Internet traffic data flow are studied based on the chaos theory. A phase space that is isometric with the network dynamic system is reconstructed by using the single variable time series of a network flow. Some parameters, such as the correlative dimension and the Lyapunov exponent are calculated,and the chaos characteristic is proved to exist in Internet traffic data flows. A neural network model is constructed based on radial basis function to forecast actual Internet traffic data flow.

摘 要：应用混沌理论，分析了网络流量，用单变量的网络流量时间序列重构与网络动力系统等距同构的相空间，进而计算了实际网络的关维数和Lyapunov指数，并证实了网络流量存在混沌特性；据此建立了基于径向基函数神经网络的模型，并对实际网络数据流进行了预测。

Detection means of the feeding coal are analyzed in the jigging process,and puts forward a fuzzy control system of the variable construction in order to control the feeding coal .

分析了跳汰过程给料量的检测方法，建立了一个变结构的模糊控制系统用以跳汰过程给料量的控制，系统由3部分组成：Bang-Bang控制、保持控制和模糊控制。

Use similar to offset press rubberand drum, with an automatic page function, you can implement duplex business card printing and membership card making, front-end work with Windows NT platform for Job Ticket for automatic control, data format is PDF, NexStation digital front-end system with Adobe's Extreme structure to accept PDF and PostScript file, or you can implement a variable data business card printing and membership card production, quality control and is available in NexQ and NexPress dry ink technology, Business card printing and membership card making good quality stability and reliability.

该机拔取近似于胶印机的橡皮滚筒，有被迫翻页功用，可达成双背制卡和会员卡制息，后端拔取Windows NT平台工息过程用Job Ticket达成被迫把持，数据不圆式为PDF不圆式，NexStation数字冻后端编制拔取Adobe的Extreme布局，可剥夺PDF及PostScript文件，也可达成可变数据制卡和会员卡制息，并且拔取NexQ质度把持及NexPress潮式油墨技艺，制卡和会员卡制息质度安定，靠得住性好。

Here pis 1 or 2.In chapter 8. we extend the Runge-Kutta methods to variable delay differentialalgebraic system. It is proved that if the Runge-Kutta method which is algebraicallystable and diagonally stable is consistent with order p , the extended Runge-Kuttamethod with Lagrange interpolation procedure is D_A-convergence with order M. HereM=min{p, u + q + 1 }, and u + q is the degree of Lagrange interpolation polynomial.

第八章将求解常微分方程的Runge-Kutta方法改造后用于求解变延迟微分代数系统，并且证明如果代数稳定且对角稳定的Runge-Kutta方法对于常微分方程初值问题在经典意义下是p阶相容的，那么具有Lagrange插值过程的该方法是M阶D_A-收敛的，M=min{p，u+q+1}，u+q为Lagrange插值多项式的次数。

The calculation result shows that the solution method has the character of high convergence precision and high stability, and the method is suit for computing big non-linear libration system model including discrete variable.

计算结果表明该方法具有较高的收敛精度、稳定性，并适合求解包含离散变量的大型非线性振动系统模型。

Using this method, the controller design for performance and robustness can be designed separately, which has the potential to overcome the conflict between performance and robustness in the traditional feedback framework. Third, to make the vehicle meet the performance index in full flight envelop, a H∞ gain-scheduled controller based on Linear Varying Parameter system are designed. A LPV plant with a linear fractional dependent variable can be represented by upper LFT (Linear Fractional Transformation) interconnection.

通过把非线性系统简化为了线性变参数系统，再有通过线性分式变换将LPV系统转化为一个线性定常系统和不确定性组成的LFT互联形式，使之转换成为一个经典鲁棒控制问题，然后通过求解一组线性矩阵不等式得到变增益H_∞控制器。

Using additional variable, a common dynamic reliability system is described by generalized semi-Markov process , and then the second Fred. Holm linear integral equation of lifetime process is obtained.

利用补充变量方法把一般的可靠性系统推广为广义半马尔可夫系统；利用广义半马尔可夫系统的积分模型，建立了描述一般可靠性系统寿命过程的第二类Fred。

The propagation matrix method used widely in stratified media is extended to laterally inho-mogeneous media,and a numerical method known as generalized propagation matrix method for simulating elastic seismic wave propagation in inhomogeneous media is presented by using mixed variable elastic wave equation and matrix exponent solution of system of linear ordinary differential equations.

应用混合变量弹性动力学方程和线性常微分方程组的矩阵指数解法，将层状介质中广泛应用的弹性波传播矩阵解法推广至横向非均匀介质，给出了一种可计算复杂地质体中弹性波传播的广义传播矩阵数值解法。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。