查询词典 duadic

About the existence of duadic codes, Ward and Zhu(1994) obtained necessary and sufficient conditions for existence of duadic abelian codes, Zhang(1997) gave the existent conditions for such codes by some parameters and obtained necessary and sufficient conditions for existence of central duadic group algebra codes.

对duadic群代数码的存在性问题，Ward和朱烈(1994)解决了域上duadic阿贝尔码存在性；张胜元(1997)年用参数形式给出更具体的判定条件和中心duadic群代数码存在的充分必要条件。

Rushanan(1991) generalized them to duadic abelian codes and Zhu(1996) further generalized them to duadic group algebra codes.

它是由Leon等人(1984)作为二元域上二次剩余码的推广而提出的；Rushanan(1991)把它推广到duadic阿贝尔码；朱烈(1996)进一步推广到duadic群代数码。

A survey of duadic codes is presented firstly, necessary and sufficient conditions for the existence of nontrivial duadic abelian codes over Z_4 are presented secondly.

文中首先综述duadic码；其次给出了Z4上存在非平凡duadic阿贝尔码的充分必要条件；最后给出了Z4上劈分为μ-1的非平凡duadic阿贝尔码存在的充分必要条件，这些条件也是存在Z4上非平凡自偶阿贝尔码的充分必要条件。

Recently, duadic codes over Z_4 are presented by Langevin and Sole(2000), but the existent problem of duadic abelian codes over Z_4 hasnt been solved yet.

Langevin和Sole(2000)首次提出环上duadic阿贝尔码的定义，对于环上duadic阿贝尔码存在性问题仍未被解决。

Zhang(1997) further generalized them to central duadic group algebra codes.

张胜元(1997)又进一步推广到中心duadic群代数码。

Duadic codes are a class of good error-correcting codes which include quadratic residue Q.

Duadic码是一类性能优良的二元循环码，它真包含二次剩余码

The problem of constructing and enumerating the duadic codes with arbitrary lengths remains open up to now.

Duadic码的构造方法和计数，以及不等价的Duadic码的计数一直是Duadic码研究中的公开问题。

Under the conditions of q=2, G is a finite group of order mn ,where both m and n are odd prime numbers, the splitting is μ-1 , the necessary condition and sufficieat condition for the existence of such duadic codes are presented.

考虑q＝2，G为mn阶非阿贝尔群且劈分为μ－1的duadic码存在的充分条件和必要条件。

Sodium citrate; calcium carbonate; calcium hydroxide; potassium bicorbonate; magnesium carbonate; ferrous sulphate; Zinc sulphate; copper sulphate; manganese sulphate; potassium iodide; sodium selenite.

柠檬酸钠；碳酸钙；氢氧化钙；碳酸氢钾；碳酸镁；硫酸亚铁；硫酸锌；硫酸铜；硫酸锰；碘化钾；亚硒酸钠。

All this to say that I'm glad filmmaking hasn't become completely ironic. I can enjoy an ironic film as much as the next person, but they usually involve a message of some sort. One that's delivered in a smirkingly clever way that requires little in the way of talent.

所有这些都是说，我很高兴电影制作没有变成完全讽刺艺术，我可以和下一个人一样享受讽刺电影的乐趣，虽然他们经常会被划归到一定级别，技术方面不需要很高的才能。