查询词典 amplitude modulation

Although hasten of near future of upriver cooking benzene is firm, but the range that the market rises is not big, each manufacturer is maintained more move smoothly, the amplitude modulation on shipment price is lesser, to suitable anhydride market prop up gradually firm, if crude benzole market goes high further, driving the possibility that cooking benzene rises is not to do not have, the crude benzole stock of manufacturer of each cooking benzene and benzene hydrogenation manufacturer is not at present much, the crop of cooking benzene is not big, market supply of goods is not much, do not eliminate small to walk along high probability.

虽然上游焦化苯近期趋稳，但市场上涨的幅度不大，各厂家多维持平稳运行，出货价格上调幅度较小，对偏苯三酸酐市场的支撑渐稳，若粗苯市场进一步走高，推动焦化苯上涨的可能性不是没有，目前各焦化苯厂家和苯加氢厂家的粗苯库存并不多，焦化苯的产量不大，市场货源不多，不排除小幅走高的可能。

It is shown a new way for fast implementation of CWT based on amplitude modulation techniques for generating wavelet chain.

该方法利用幅度调制技术产生小波链实现小波变换，为小波变换的快速实现提供了新的途径。

The CPM signal can be expressed as a sum of finite number of time limited amplitude modulation pulses by Laurent Decomposition. The optimum receiver of CPM is simplified by Laurent Decomposition.

引入了Laurent分解技术将非线性的CPM分解为一系列的PAM波形叠加的形式，利用Laurent分解的特性在保持性能的条件下给出了CPM的最佳接收机的简化模型。

In the past, the high frequency resonance technique is usually applied in the envelope detection for a vibration signal with amplitude modulation. When applying the Hilbert transform in the high frequency resonance technique for the envelope detection of vibration signals, the computing burden is very high. On the other hand, when applying the linear least squares analysis method, the computing burden is lower. When applying the envelope detection in the lowest vibration mode, an accelerometer with the low-pass filtering cutoff frequency at 4kHz should be choose.

在过去的研究方法中，振动讯号之振幅调变通常以高频解调分析法应用於包络讯号侦测，而高频解调方法应用希尔伯特转换的包络分析，所需要的计算量是非常的高，若以线性最小平方分析法应用於高频解调分析法中，则所需要的计算量较小，如果以最低模态来估测包络讯号时，可以适当的选取加速规来代替低通滤波器，而加速规的截止频带必须在4kHz左右。

White noise generator, can be amplitude modulation, frequency, phase.

白噪声发生器，可以调制幅值，频率，相位。

Their vocal quality is better than non-passerine, but still much less than oscine passerine. Compared with non-passerine, they appeared longer syllable length, higher basic frequency and more viable frequency ranges. Though the amplitude modulation properties enhanced their vocal production, the type of syllable is still stable and less of variety. So thephrase consisted of syllables are comparatively few and changes of the tone are relatively less.

且表现出很强的频率调制特性和特有的幅度调制特性，相对的音节时程比较长，基频较高且频率变化范围较大，所特有的幅度调制特性更增加了其控声的能力，但其音节的种类仍很单一，缺乏变化，由音节所组成的句型较少，音调变化幅度不大，因此，其叫声质量尽管较非鸣禽有所改善，但相对鸣禽而言却又远远不如。

This invention discloses a data retransfer method based on bit conversion which is to exchange positions forming bits, according to selected exchange way before quadrature amplitude modulation to each retransferred data.

本发明公开了一种基于比特变换的数据重传方法，该方法的关键是在每次重传数据进行正交振幅调制之前，对数据内各组成比特的位置按照选定的变换方式进行调换；该方法还进一步包括：a。

The Mixed pole-changing simplex winding multispeed motor can eliminate the imbanlance current in parallel branch circuits of parallel pole-changing windings, this is another significant breakthrough after " pole and amplitude modulation speed " in the pole-changing motor development history and is at the world leading position.

混相变极的单绕组多速电动机能消除并联换相变极绕组诸并联支路间不平衡环流，是变极电机发展史上继&极幅调速法&之后又一重大突破，处于世界领先地位。

Three approximate methods (called as scaling, rectangle and trapezia methods respectively) for performance analysis of orthogonal space-time block code with M-ary phase shift keying and M-ary quadrature amplitude modulation over flat Rayleigh fading channels are proposed, and their approximate performance expressions are given.

在平坦瑞利衰落信道下，提出了3种正交空时分组码在MPSK和MQAM调制下的近似性能分析方法(分别称为放缩法、矩形法和梯形法)，并给出其近似表达式。

Three approximate methods (called as scaling, rectangle and trapezia methods respectively) for performance analysis of orthogonal space-time block code with M-ary phase shift keying and M-ary quadrature amplitude modulation over flat Rayleigh fading channels are proposed, and their approximate performance expressions are given-The analysis of approximate results shows that OSTBC can obtain full diversity orders.

在平坦瑞利衰落信道下，提出了3种正交空时分组码在MPSK和MQAM调制下的近似性能分析方法（分别称为放缩法、矩形法和梯形法），并给出其近似表达式。通过对近似结果的分析，OSTBC能获得满分集增益。

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。