状态变换

The AR spectrum is not restricted by length of data, and AR spectrum parameters are sensitive for law of condition change. Autoregressive transformation is made to vibration signals, and then AR spectrum coefficients are got which can be utilized as feature vectors. Fault diagnosis method for centrifugal pump Based on AR and 2D-HMM is produced in this paper. The topology of this model and its parameters were introduced too.

利用AR谱不受数据长度的限制，AR模型参数对状态变化规律反映敏感的特点，以振动信号做自回归变换后的AR谱系数作为特征向量，将基于AR的2D-HMM引入到离心泵故障诊断中，提出了一种基于AR的2D-HMM故障诊断方法，并论述了该模型的拓扑结构和主要参数以及相应的训练和识别算法。

But the space that be designed by traditional design method usually makes the space of the partition be placed in the concretionary appearance,and it can't make its free transformation with combine by the person's requirements.

但用传统的设计方法设计出的空间，经常使分割的空间处于凝固的状态，无法使其随人的需求变化而自由变换和组合。

With the aid of inverse Laplace transform, the main reliability indexes of the system such as system availability and reliability can be calculated.

假定每个部件仅有2种状态：工作或失效，那么系统的状态过程是一个时齐的离散的马尔可夫链，它可以产生1列微分方程，借助于拉普拉斯逆变换可计算出该模型的主要可靠性指标--系统的可用度及可靠度。

Adopting generalized Jordan block and algebra equivalence transform method, all of the transfer functions at different load points can be transformed to state-space description with time variable. The steady robustness of three different mode of control systems were researched by mathematic analysis. It shows that: for the high order inertia controlled object with the characteristic of nonlinear and time-variable that described by the set of transfer functions, the Luenberger function observer established according to its any algebra equivalence state-space description, if some conditions can be met, there would be a matrix of T with n′n satisfied the Sylvester matrix equation TA- FT=GC.

采用广义约当块及代数等价变换方法，可将分段的传递函数描述转换为变参数的状态空间描述，对3种典型控制系统的稳定鲁棒性所进行的理论研究表明，对同一组传递函数描述的具有非线性和时变特性的高阶惯性受控对象，依据其任一代数等价的状态空间描述所构建的Luenberger函数观测器，在满足一定的条件时，存在n′n解阵T满足Sylvester矩阵方程TA- FT=GC。

Using Fourier expansion, Laplace transforms and Hankel transforms with respect to the circumferential, time and radial coordinates, respectively, the partial differential equations are reduced to a set of ordinary differential equations. Transfer matrices for this situation are derived and explicitly solved.

利用Fourier级数和Laplace-Hankel变换，将该状态变量方程转换为两组一阶常微分方程组，提出了有限层饱和多孔介质空间非轴对称Biot固结问题的传递矩阵，得到饱和多孔介质空间非轴对称Biot固结问题在状态空间中的解。

The decentralized state feedback controller is obtained by using the linear transformation of the state of each subsystem.

通过子系统状态的线性变换，得到分散状态反馈控制律。

The decentralized state feedback controllers are obtained by using the linear transformation of states of each subsystem.

通过子系统状态的线性变换，得到分散状态反馈控制律。

According to the analysis of reasons of transformer mal-operation in Pingdingshan Electric Power Bureac for years , and according to the present situation of transformer protection studies and applications at home and abroad. This paper points out the shortcomings of discrimination between internal faults and magnetizing inrush, the problems existing in differentiating the slight faults of turn-to-turn in transformer are also advanced. On the base of the electromagnetic characteristics of transformer, the relations between fluxional differential current and voltage of source side analyzed, all the operating states of transformer simulated by EMTP/ATP, the criterion of magnetizing inrush in transformer is got. Through the wavelet analysis of current waveform, using the intense reaction of wavelet transform to the little change of signal, the internal faults of transformer are distinguished by testing local extremum.

本文根据平顶山市电业局历年来变压器保护误动的原因分析，并根据国内外变压器保护使用和研究的现状，指出了现有变压器保护在区分变压器励磁涌流和内部故障方面以及在判断变压器匝间轻微故障方面存在的问题和不足；从变压器电磁特性出发，分析了电源侧电压和电流微分之间的关系，利用电磁暂态仿真程序对变压器各种运行状态进行了仿真，并以此建立了判断变压器是否含有励磁涌流的判据；通过对电流波形的小波分析，利用小波变换对信号微小变化极强的反映能力，通过检测电流的局部极值点来区分变压器运行状态，并作为上述判据的补充。

The nonobvious relation is between the register state R of the original program and the location state R′ of the transformed program. Given that each pseudo-register r is mapped to the location j, we could naively require that R = R′j(r for all r.

原始程序的寄存器状态R和变换后程序的存储状态R′之间的关系并不那么明显，假定每个伪寄存器r映射到分配单元j，我们可以简单地要求对所有r有R = R′j

Visual evoked potentials of twelve healthy volunteers were recorded under two conditions including normal state and one night's sleep deprived state, and were wavelet transformed to time-frequency values between 30 to 60 Hz. The inter-trial phase coherence of prefrontal lobe and the evoked response phase coherence between prefrontal lobe and occipital lobes were calculated.

在正常状态和一夜睡眠剥夺状态下提取12名受试者的视觉ERP，进行30~60 Hz的小波变换，以此计算前额叶区域的导联内相位相干，以及枕叶和前额叶之间的相位相干性。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了