查询词典 cyclic method

Cyclic Redundancy Check Cyclic Redundancy Check method of principle as follows :(1) The data to be sent to the corresponding polynomial p.

令T=M+R，采用模2运算，T所对应的数据是在原数据块的末尾加上余式所对应的数据得到的。(6)发送T所对应的数据。

Spatial white noise is considered first then the spatial colored noise. Two method based on 1st and 2nd order cyclic moments, CERA, and then 3rd order cyclic moment, MCERA, are proposed separately.

分白噪声及有色噪声两种情况，分别提出了基于一、二阶循环矩的CERA方法和基于三阶循环矩的MCERA方法。

As to cyclic codes over finite chain rings, we study their stucture and develop the Fourier Transform method to finite chain rings. The permutation groups of cyclic codes and their extended codes are investigated using their Mattson-Solomn polynomials.

对于有限链环上的循环码，我们研究了它们的结构，并把傅立叶变换的方法推广到有限链环，用循环码的Mattson-Solomn多项式对循环码及其扩展码的置换群进行了研究。

Owing to its cyclic symmetry the complex constraint method for the eigenproblems of cyclic symmetric structure is applied to calculating the eigenpairs of the helical gear structure.

根据齿轮结构的循环对称性，以仅含有一个完整轮齿的扇形子结构作为齿轮有限元计算模型，用计算循环对称结构特征值问题的复约束方法，通过求解一个扇形子结构的特征值问题得到整个齿轮结构的特征值和特征向量。

Secondly, according to the spectral correlation theory of second order cyclostationary processes, maximumlikelihood filters are used to estimate the cyclic spectra. By estimating the crossspectra of the two frequency shifted versions of cyclostationary signal, the cyclic spectra can be obtained. The analysis effective bandwidth of maximumlikelihood filters is studied in details. In case of cross-spectra estimation, the analysis effective bandwidth of maximum-likelihood filters is not correct. A new method to calculate the analysis effective bandwidth is presented.

第二，根据二阶周期平稳随机信号的谱相关理论，提出了循环谱密度估计的最大似然滤波器法，即采用最大似然滤波器估计出周期平稳信号的两个频移分量之间的互谱密度，从而得到了循环谱密度的估计；对最大似然滤波器的有效分析带宽做了详细的分析，指出了在互谱密度估计时以往的有效分析带宽不正确，并提出了互谱密度估计时的有效分析带宽的新的计算方法。

The main contributions of the dissertation are as follows: The conjugate cyclic ESPRIT and spectral correlation conjugate cyclic signal subspace fitting method with minimum-redundancy linear-array are presented for narrowband DOA estimation.

利用阵列天线和先进的信号处理技术，可以充分地开发信号中蕴藏的"空间维信息"，形成精细赋形波束，有选择地接收和发送用户信号，从而有效地抑制干扰，提高系统容量和服务质量。

In order to improve the electro-catalytic activity of platinum based catalyst to methanol oxidation, in this thesis, firstly prepare heteropoly acid modified Pt/GC electrode with different concentration by cyclic voltammetry method, and then test the cyclic voltammetry curves individually in vitriolic and methanol solution. The study shows the best concentration for both phosphomolybdic acid and phosphotungstic acid is 1×10~(-3)mol/L. And find the more heteropoly acid modified on electrode, the lower peak-up potential towards methanol because of the existence of oxygenous species.

为了改善铂基催化剂氧化甲醇的催化活性，本论文首先通过循环伏安扫描法制备了不同浓度磷钼酸和磷钨酸修饰的Pt/GC电极，通过研究Pt/GC电极在修饰前后在硫酸溶液中及含甲醇的硫酸溶液中的循环伏安行为发现，磷钼酸和磷钨酸均能在PtRu/C电极上发生氧化还原反应，而且杂多酸修饰浓度对Pt/GC电极氧化甲醇的催化活性有很大影响。

In addition, the new testing method determining the undrained cyclic strength is developed on the basis of the cyclic degradation behaviour of the soft clay in the thesis.

此外，按照软粘土循环弱化特性，本文提出了一种确定不排水循环强度新的试验方法。

cyclic redundancy check code is a very important cyclic code,the coding and decoding methods are simple,easy to realize.it is strong to detect error,the probability of misjudging is nearly zero.it is a method with extremely high efficiency in controlling errors,which can fulfill the requirement of reliable information transmission in communication systems.it has got very extensive application in observing and controlling and data communication.this paper introduces the encoding and decoding principle of crc in detail,analyzes the feasibility of crc by dsp,and gives out the design proposal and flow chart according to the principle,which is very useful in applications.

摘 要：循环冗余校验码是一种重要的循环码，编码和解码方法简单，容易实现，检错能力强，误判概率几乎为零，是一种效率极高的差错控制方法，可以满足通信系统可靠传送信息的要求，在测控及数据通信中得到了非常广泛的应用。详细介绍了循环冗余校验的编解码原理，分析了用dsp实现crc的合理性，最后给出了根据校验原理实现的设计思想及流程图，具有一定的实用价值。

Using acetone as a photosensitizer,and N3· as an oxidant by pulse radiolysis method,the induced oxidation of cyclic-Phe-His in aqueous solution has been also reported in this paper,results similar to the photoionization of cyclic-Phe-His have been found.

而具有亲电子性的丙酮能在该环肽的苯丙氨酸残基的苯环上抽取电子，形成320nm和410nm的特征吸收峰，求出了自由基的有关动力学参数，并用脉冲辐解动态吸收光谱法印证了上述结果。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。