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Based on some influential theories of the structure analysis of codeswitching, such as free morpheme constraints, equivalent theory and matrix language frame model, and so on, the author puts forward a pattern, which takes the MLF Model as the basic theoretical frame, considers the concrete situations, and divides the Chines-English codeswitching into intrasentential codeswitching, intersentential codeswitching, and diglossia codeswitching.

并在分析一些语码转换结构研究上较有影响的理论基础上，如自由词素限制、对等限制、母体语言模式等，提出了以母体语言模式为基本理论框架，并与中英语码转换的具体情况相结合的中英语码转换分类模式，即句内转换、句际转换和双语转换。

The elementary event semantic and the causality between parent object and son object are expressed in a form of"subject-predicate-object"as "Parent Object Identity -Event Identity -Son Object Identity ".

用"父亲对象标识码-引起变化的事件标识码-变化后的儿子对象标识码"这样一个"主语-谓语-宾语"的形式表达最基本的事件语义和父子对象之间的因果关系。

According to the system specification of DRM given by ETSI, the channel coding scheme applied to the system is a set of combination schemes of the multilevel coding and modulation.

根据欧洲电信标准化委员会提供的数字调幅广播系统说明书可知，该系统采用的信道编码方案是一套基于删除卷积码的多级编码和调制的组合方案，它机制灵活，可以针对不同的数据通道和不同的信道条件选择不同码率的分量码和星座图。

Unicode has started to replace ASCII, ISO 8859 and EUC at all levels.

Unicode（统一码、万国码、单一码）是一种在计算机上使用的字符编码。

Firstly, it's proved that the base of free monoid is unique, and that the equation of a base, a generating set and a irreducible generating set in the semigroup with length; Secondly, it's given the relation of a primitive word and a word of indecomposable--Let and is indecomposable, then is primitive ;And by using the length's method and chart,some properties of primitive word have been proved and the solutions of the equation , are discussed; Lastly, on the base of some proposition in Free monoids and Languages ,the proofs of some properties are improved by instruction. For example: Let be a primitive word over X, where .Then is a code. And let then if and only if {} is a code.

首先，讨论了含幺半群中基的基本性质及基与最小生成元集的联系，并给出了含幺半群中基、生成元集、不可约生成元集三者之间的关系；证明了在有唯一长度的半群S中，不可约生成元集、基、最小生成元集三者之间的等价关系；其次，讨论了字的组合与分解性，得出了字的本原性与不可分解性之间的关系---若为不可分解的，则一定是本原的，反之，不一定真；并运用图示法证明了字的可补性理论，讨论了方程，的可解性；在此基础上，用归纳法进一步证明了本原字与码的有关命题--若是X上的一个本原字，其中，则是一个码；若则当且仅当{}是一个码。

Four full adder original code, including the simulation code and four counter code.

4位全加器原码，包括仿真码和4位计数器码。

Starting from the configuration of the optical prime code, a kind of key signature code for the optical code-division multiple access system, based on the linear congruence theory in the finite Galois field, the correlation properties of the basic prime code, the extended prime code and the modified prime code are mathematically analyzed, the distribution of cross-correlation values is given and the overlap area of "1"s in the case of periodically circularly shifting is indicated.

摘 要：围绕OCDMA系统的重要地址码类型--光素数地址码的结构模型，根据有限Galois域上的线性全等理论，系统分析了基本素数码、扩展素数码、修正素数码的互相关特性，指出码字中"1"位的重叠区域。

When the generator polynomial of a given linear rank distance code possesses generalized continuous roots set, the sufficient condition that makes the given linear rank distance code forming rank distance BCH code is discussed.

他们指出当线性秩距离码的生成多项式的根集不是连续根集时，确定秩距离码的最小秩距离以及构做极大秩距离码是未解决的问题。

And we have given Hadamard matrix in detail in block design, coding and the specific application in communication., Hadamard code as a nonlinear combinatorial code has catered to the need of development of computer technology, stock systematic data and high speed for realizing and reliable access, request the error control code has not only little redundancy, but also can parallel encoding and decoding with high speed.

Hadamard码作为一种非线性组合码，迎合了计算机技术的发展对实现存储系统数据高速且可靠地存取，要求所采用的差错控制码不但冗余度小，还应当能高速并行编码和译码的需要。

Selected some of the more representative test of the identification code to do the test,.

选取了一些比较有代表性的验证码做了识别的试验，介绍了添加纹理的验证码去除纹理的方法，根据试验的结果，论证了现有验证码不能很有效的保证系统的安全。

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。