码

Since the 2-D perfect difference codes have a MUI cancellation property and cross-correlation much lower than that of conventional 2-D spectral/spatial codes, such as Maximal-area matrices codes, the proposed system can completely eliminate the MUI and effectively suppress the PIIN.

由於二维完美相差码系具有一多使用者干扰相消特性，并且其交叉相关系数系远小於传统之二维频谱/空间码，如最大面积矩阵码maximal-area matrices codes， i.e。

It is well known that the multi-value CDMA spreading codes can be designed by means of a pair of mirror multi-rate filter-banks based on some optimizing criteria. The dissertation indicates that there exists a theoretical bound in the performance of its circular correlation property, which can be described by an explicit expression.

研究了基于两带镜像多速率滤波器组来设计的多值CDMA扩展码的方法，并推导出了基于这种方法设计的码序列在循环相关特性方面所能达到的极限，以及达到此理论极限时应满足的条件；在此基础上，提出了一种基于熵最大化准则来产生CDMA扩展码的设计方法。

This method estimates Doppler frequency by eliminating PN code two-phase modulation effect, then gains code phase estimation by circular correlation.

该方法利用伪码二相调制特性，通过乘法消除伪码影响，得到多普勒估计值，在此基础上运用圆周相关法得到的伪码相位估计值。

This paper proposes a codebook design method based on genetic algorithm and the LBG algorithm.

1引言目前的LBG[1]码书设计算法受到初始码书的影响，往往产生局部最优码书。

The three key techniques of basic VQ are codebook design, codeword search and codeword index assignment.

矢量量化的关键技术是码书设计、码字搜索和码字索引分配。

In order to improve the minimum distance of the self-orthogonal code, a new expurgating method and the combinatorial construction of one-step completely orthogonalizable codes are proposed.

为了提高自正交码的码距，本文给出了增余删信法和一步完备可正交码的组合构造。

Based on cyclic shifted perfect code sets and traditional mutually orthogonal complementary sets, the designed set can obtain multiple subsets, and the number of complementary codes in each subset comes up to theoretical bounds.

该码集基于循环移位的完美码集和相互正交的传统互补码集，可以获得多个互补码子集，每个子集中码的数目都达到了互补码集的理论界。

We integrate world-wide advanced manufacturing technique, mechatronics technology, automation technology, and network technology into our dry end corrugator equipments.

多年来广州市开源达喷码技术有限公司致力于电脑喷码机设备关健技术的应用与开发，特别是在喷码机稳定性技术的研究方面取得了令全国同行瞩目的成就，达到国内先进水平，赢得了用户的广泛赞誉。

In this paper, new classes of linear block codes over finite fields of the algebraicinteger ring of quadratic number fields Qd~(1/2 modulo irreducible elements with norm p or p~2 are presented. These codes can correct one error which takes from the cyclic subgroup of the multiplicative group of the finite fields. The results presented in this paper extend the corresponding results of previous papers.

在处理适用于二维信号的线性分组码时，我们考虑类数为1的有理数域二次扩域Qd~(1/2的代数整数环，利用范数为p或p~2的不可约元构造有限域，给出剩余类域的一组完全陪集代表元系，从而构造出一类有限域上的线性分组码，当错误取值于有限域乘法群的一个循环子群时，所得到的适用于二维信号的线性分组码可以纠单个错，推广了文[14-16]的结果。

The traditional software that reduce toxin is with the feature code means reduces toxin, diagnostic code takes virus example former course namely, put forward a paragraph of of similar dactylogram unique code in the program, add in the software that reduce toxin, scan next all files, if have yard of this paragraph of feature, it is virus, can be killed.

传统杀毒软件都是以特征码方式杀毒，特征码即把病毒样本原程序拿到，提出程序中类似指纹的一段独一无二的代码，加到杀毒软件中，然后扫描所有文件，如果有这段特征码，就是病毒，即可被杀掉。

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。