调制的

E. block-pulse functions , a arbitrary piecewise constant functions which are orthogonal and unconcerned are introduced to analyze and synthesize fluid PWM system to solve some related problems of PWM system.

第一章首先通过对流体脉冲调制及相关技术的研究发展现状综述，阐明了寻求高效的分析与设计手段以推动流体脉冲调制系统研究、发展和应用的必要性和重要意义。

Then three candidate modulation schemes exploiting spatial dimensions are proposed. At last, the three modulation schemes are compared by power efficiency and bandwidth efficiency. It shows that spatial quadrature amplitude modulation scheme is appropriate for long distance wireless optical communications for its high bandwidth efficiency and spatial circular symmetry.

参照传统时域信号设计方案，提出了三种空间调制信号具体设计方案，并从带宽效率和功率效率两性能上进行了比较，结果表明正交幅度调制具有带宽效率高、功率效率低的特点，而且采用的信号点越多其带宽效率就越高，另外其空间信号图案还具有圆对称性，因此非常适合在空间带宽有限的远距离无线光通信中使用。

In this paper,a design method of two dimensional Linear Phase Nearly Perfect Reconstruction filter banks based on a new class of cosine modulation systems is presented,which can be described as follow: firstly,the Parks-McClellan algorithm is adopted for designing the prototype filter,then by employing cosine modulation,a series of analysis and synthesis filters can be obtained,accordingly a one-dimensional LP-NPR filter banks can be constructed;Secondly,cascading two one-dimensional LP-NPR filter banks in the form of tree structure and using the unimodular transformation,a two dimensional nonseparable LP-NPR filter banks can be obtained.

提出了一种基于一类新余弦调制系统的二维线性相位-近似完全重构滤波器组的设计方法，设计过程分为两个步骤：首先采用Parks-McClellan算法来计原型滤波器，再经过余弦调制能到一系列的线性相位分析和综合滤波器，从而可以构造一维LP-NPR滤波器组；然后利用树状结构来结合两个一维LP-NPR滤波器组，并运用单位模变换，可以得到二维不可分离LP-NPR滤波器组。

The chirp parameter of modulators is an important index of performance evaluation in fiber-optic communicalion system.

在光纤通信系统中，调制器的啁啾参数是衡量调制器性能的重要参数之一。

Simulations of the full system demonstrate that the development of the MI in the former regime leads to the establishment of a regular or chaotic array of pulses if the MI saturates, or a chain of well-separated peaks with continuously growing amplitudes if the instability does not saturate.

系统仿真结果表明：如果充分考虑调制不稳定性，则该系统将产生规则或者不规则的脉冲序列。反之，如果不考虑调制不稳定性它将产生一连串具有连续增长振幅的离散峰。

The key technologies of novel photoelectron elements to support RoF are optical generations and receivers technologies for millimeter wave subcarrier, including external modulator method, radio frequency up-conversion method, self-heterodyne method, generator of optical pulse self-modulation, and so on.

近年来，支撑RoF技术的新型光电子器件的关键技术有毫米波副载波光学产生技术和接收技术，其中包括外调制器方法、射频上转换法、光学外差法、毫米波调制光脉冲发生器等等。

Meanwhile, the company's Marriott chain is training bartenders to make cocktails with fresh juices, fruit and herbs, which means muddling raspberries and blueberries, or crushing mint leaves for the perfect mojito.

同时，该公司的万豪连锁酒店还培训酒保，用鲜果汁、水果和香草调制鸡尾酒，就是把覆盆子和蓝莓搅在一起，或把薄荷叶捣碎，调制一杯完美的「莫西多」。

Third, the orbital velocity of ocean wave was considered as the basic dynamic factor, and the imaging model calculates the influence on raw data by the wave movement according to the orbital velocity.

研究了海面的电磁波后向散射模型和海浪对SAR信号的调制机理，其中，重点研究了复合表面模型和速度聚束调制机理，在此基础上建立了适合于海面的SAR成像模型。

The constraints of oversampled cosine modulated filter banks with perfect reconstruction are deduced in this paper and then we propose an iterative method for designing the prototype filter.

接下来我们推导了过采样余弦调制滤波器组的完全重构条件，提出了一种迭代算法设计完全重构的过采样余弦调制滤波器组。

The effects of Mach-Zehnder Modulator bias-drifting and chirp on the single sideband radio over fiber link were investigated and simulated.

分析了光纤无线通信系统中的马赫-曾德尔调制器偏置漂移和啁啾效应，计算了单边带调制RoF链路输出目标谐波的功率抖动和谐波抑制比。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。