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Altogether, the paper contains four major parts:In part one, the character of digital channel is discussed, especially analyse and research the index of error bit, jetter and .

论文具体分为以下几部分:第一部分主要是对数字信道的特点进行研究,重点对数字网传输损伤中的误码、抖动和漂移等度量指标进行理论研究和分析,提出一种和以往的信道模拟思路完全不同的方法,即把数字信道的主要特性映射到基带来模拟。

The design of fuzzy H(subscript ∞) filter is based on T-S fuzzy model, which assures asymptotic stability and prescribed H(subscript ∞) index for the error filtering system.

模型H H滤波器的设计建立在T-S模糊模型上并能确保滤波误差系统的渐近稳定和给定的H H性能指标。

An integral square performance criterion containing tracking error and control energy was defined. Spectral factorization to minimizing the performance index for different systems was applied and corresponding parameter tuning methods of PID controller was derived, which could be used to obtain optimal control performance under control energy constraint.

定义了一个包含跟踪误差和控制能量在内的积分平方性能指标,针对不同系统运用谱分解的方法最小化该性能指标,从而导出相应的PID控制器的参数整定方法,可使系统在控制能量约束条件下具有最优的控制性能。

Analyzing the problems on the industrial structure in Peripheral Zone of Bohai Sea with structure similar coefficient and product specialization coefficient, and measuring the level of interlocal division of labor by the index of location quotient square-error( LQS[2]), as a result, in the manufacturing structure there exists duplication to some extent, while in the manufacturing products structure, the duplication is less serious.

从结构相似系数和产品专业化系数两个指标分别分析环渤海地区产业结构问题,用区位商方差(LQS[2])测度区域内工业行业的区际分工程度。分析表明:该区域制造业结构虽存在相当程度的趋同现象,但产品结构趋同程度较弱,基本不存在同构问题。

The invention refers to a method to correct universal frequency of electric communication technique, its character: make signal index quantization on the complex number of cross product, to directly reflect the quantized numerical value of tangent value and the located quadrant of imaginary and real parts, use inverse tangent ROM table to discriminate the processed result, then make loop filter and phase accumulation on the discriminated result to obtain error-correcting angle, and use digital controlled oscillator to make table look-up and quadrant adjustment to obtain correcting factor; use the relationship of trigonometric function in each quadrant to compress inverse tangent look-up table ROM and digital controlled oscillator look-up table ROM.

一种涉及电通信技术的通用频率纠正的方法,其特征在于:它采用如下步骤:经过叉积的复数进行信号指数量化处理,通过该复数虚、实部信号的指数量化结果的差值及其极性直接反映虚、实部的正切值的量化数值以及所处象限,将处理后的结果通过反正切ROM表进行鉴频,鉴频后的结果经环路滤波和相位累加,得纠偏角度,通过数控振荡器针对纠偏角度进行查表和象限调整,得到纠正因子;通过个象限之间的三角函数关系来压缩反正切查表ROM和数控振荡器查表ROM的大小,本发明资源耗费小,效率高,可极大地节省内存资源。

When it comes to the local prediction of chaotic time series, owing to the fact that the fixed embedding dimension、the number of the nearest neighbours and regularization parameters can cause the added prediction error,we give the adaptive local linear method and discuss the adaptive selection method of regularization parameters, the advantage of which is tested by the Henon map and Lorenz system simulated data and the integrated index in stock market of Shanghai, to show its practicable value.

通过Henon映射和Lorenz系统的仿真和上海证券市场综合指数的实证分析,说明了基于正则化回归的自适应局部线性化方法能减小预测误差、提高计算精度。

The method applies the progressive optimization theory to derive preview control input based on minimalization of performance index of trajectory error area between desired and actual trajectory, the feature of preview control input is that feeback and preview feedforward coefficients are changed in every sampling time.

该方法从目标路径与实际路径之间的面积误差评价函数值最小化观点出发,运用逐次最优化原理来求取最优预见控制输入。

To evaluate the precision of solutions obtained by modal series method, normal form method and linear modal method, an error index describing the approximation to the nonlinear simulation is defined and then applied to the same system.

为比较模态级数法、正规形法和线性模式分析法所得解对时域仿真解的逼近程度,定义一误差指标,并在4机2区系统中做相关分析。

The problem of PI controller design for the multi-input and multi-output system is transformed to that of static output feedback controller design via the new state variable. As to the problem of the static output feedback, a new LMI-based sufficient condition of the controller is presented in this thesis. We can gain the multivariable PI controllers just solving one LMI inequality. The numerical example is provided to illustrate the proposed design approach. 3.The H_∞ robust control is able to solve the multivariable problem, also the control problem characteristic of the modeling error, parameters uncertainties and unknown perturbation, Its application research in the power electronics is beginning now. Considering the characteristics of the PWM DC-DC converters, a multivariable PI controllers which is based on H_∞ Performance Index is designed.

通过构造新的状态变量,可以将多输入多输出系统的PI控制器设计问题转化为静态输出反馈控制问题,利用后者的成熟理论来设计控制器;本文在问题转化后采用更为简便的算法,只需通过求解一个LMI不等式,就能求取基于H_∞性能指标的多变量PI控制器参数,实例验证了算法的有效性。3.H_∞鲁棒控制具有处理多变量问题的能力,可解决具有建模误差、参数不确定和干扰未知系统的控制问题;它在电力电子学中的应用研究刚刚开始。

Considering the ionospheric refractive index in geomagnetic field, the radiowave polarization plane rotation has been calculated. For linear frequency modulation pulse signal, the expression of Doppler shift error due to ionospheric dispersion characteristics is derived.

本文还计算了考虑地磁场时电离层双折射指数特性引起的电波极化面旋转角,推导出对于线性调频脉冲信号电离层介质色散特性引起的合成孔径时间内多普勒频移误差的表达式。

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