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In chapter 4, a novel construction method for LDPC codes with fast encoding is proposed. An approximate lower triangular check matrix is constructed by modified PEGP method.

第四章提出了快速编码LDPC码的构造方法，直接构造具有近似下三角校验矩阵的LDPC码。

And based on Scotton's Markedness Model, the author sets forth the meanings of code-mixing and code-switching.

从Scotton的标记模式的角度对语码混杂、语码转换等概念进行了分析。

The cut-off bits mask should be subset of the info bit mask.

截止位掩码应是信息位掩码的子集。

In this paper,the influence of the Doppler shift on the performance of the PN code acquisition circuit is analyzed,and the method of orthogonally relative elimination is proposed to eliminate the Doppler shift.

文章在分析多普勒频移对PN码捕获性能影响的基础上，采用基带正交对消法去消除多普勒频移，消除了多普勒频移对PN码捕获电路的影响，解决了低信噪比情况下在基带上消除多普勒频移的难题。

Mnemonics are made up of letter to represent the operation code.

助记码是由字母组成，以代表操作码。

The algorithms based on two necessary condition is monotone decreasing, for multi-extreme point in solution space, the distribution of final codebook seriously depend on that of initial codebook, it is difficult to cast off if get in local optimality.

然而这些算法本身属单调梯度下降算法，在解空间存在多极值点时，最终码书的分布较大依赖初始码书分布，一旦落入局部最优区域，很难摆脱。

The heavier bullet reduces muzzle velocity from 3,200 feet per second (975 m/s), to about 3,050 feet per second (930 m/s).

更重的弹头具有较少的初速，从早期型号的3，200码每秒（975米每秒）到A2的大概3050码每秒（930米每秒）。

FOSS including freshmen enrollment management system, library management system and neighborhood property management system, college wage management system.

源码包括新生报名管理系统，图书管理系统，小区物业管理系统，高校工资管理系统。Delphi与数据库结合的源码，简单好用。

Is a transfer mode in which all types of information are organized into fixed form cells on all asynchronous or nonperiodic basis over a range of mediA.(70) is an identifier of a web page.

循环冗余校验(cyclic-redundancy check，CRC)是由分组线性码的分解而来，其主要应用是二元码组，主要应用于数据传输过程中的差错控制。

An error detection code is attached on a per transmission symbol basis and transmission is performed, and, when mobile terminal apparatus 100 at the receiving end detects an error, subcarrier information obtainer 130 counts the number of carriers having received level below predetermined standard on a per group basis, and makes the group having the count value above a threshold level subject to retransmission request.

在要发送的每个发送码元上增加差错检测码，当接收端的移动终端装置(100)检测到差错时，副载波信息获得器(130)对具有低于预定基准的接收电平的副载波的数量计数，并且确定重发具有高于门限值的计数值的组。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。