上交换的

The relation between the rank of a matrix and the rank of its compound adjoint matrix over any commutative ring is given.

建立交换环上矩阵A的秩与A的复合伴随矩阵C*k的秩之间的关系。

In particular, when thereis an alternating group A_5 action on a Spin 4-manifold X, we obtain: If X is smooth Spin4-manifold with non-positive signature and b_1=0, denote k=-σ/16 and m=b_2~+,then 2k+3≤m if b_2~++b_2~+≠2b_2~+(Z/A_5) and b_2~+≠0,where and are subgroups of A_5 generated by the elements s=∈A_5and t=∈A_5 respectively.

特别地，在Spin 4-流形具有非交换群A_5作用时，我们得到了：若X为光滑的具有非正符号差的Spin 4-流形，b_1=0，令k=-σ／16，m=b_2~+，如果X上具有Spin交错群A_5作用，且满足b_2~++b_2~+≠2b_2~+(X／A_5)，b_2~+≠0，则2k+3≤m，其中和分别为s=∈A_5和t=∈A_5生成的A_5的子群。

In chapter 1, the relations between spectrum displacement problem and controllability, observabiity for linear systems over a commutative Banach algebra have been discussed, the open problem about spectrum displacement posed by Kaashoek have been solved, and the if and only if conditions for stability, stabiizabit~ detectability have been obtained.

第一章，讨论了交换Banach代数上线性系统的谱配置问题与可控性、可观性的关系，解决了Kaashoek等提出的关于谱配置的公开问题，给出并证明了判定其稳定性、可稳定性、可检测性的充要条件。

The extracts of water and alcohol were separated by ion exchange resin. The eluates of neutral solution were the most effective against hydroxyl radicals and the highest rate of inhibiting hydroxyl radicals was 81%. The eluates of basic solution were also effective, the inhibit rate of which was 60%.

将发酵灵芝粉的水和醇提取物上离子交换树脂柱，依次用酸性、中性、碱性淋洗液洗脱分组，发现中性洗脱部分对羟基自由基抑制作用最强，抑制率最高可达81％；碱性洗脱部分亦具有抑制羟基自由基的效果；酸性洗脱部分抑制羟基自由基的作用不强，且占很少比例。

Based on the field surveys on a wide scale, the systematic studies were made on soil acid properties, particle fractions, exchangeable performances, saturated base, free feeric properties, clay chemical components, clay mineral types and their properties of genesis.

在大量野外调查的基础上，系统地研究了土壤的酸性特征、颗粒组成、交换性能、盐基饱和度、铁的游离度、粘粒化学组成及粘土矿物类型等发生学性质。

As children became more valuable in emotional terms, she argues, their "exchange" or "surrender" value on the market, that is, the conversion of their intangible worth into cash terms, became much greater.

她说，正如儿童在情感方面会更加珍贵，他们在市场上的&交换&或&转让&价值，即将他们无形价值朝现金形式的转化，要更大的多。

This paper focuses on the implement of Internet Protocol quality of service based on certain packet switch processor in a layer 3 switch.

本文研究的重点是服务质量在具体包交换芯片上的实现研究。本论文主要分为以下四个部分：第一部分分析了声信息在网络传输的特点。

On the commodities exchanges, for example, dealers in metals, grains, and pork bellies trade in totally undifferentiated generic products.

在日用品交换，经济平均主义上，金属，喱和猪肉的商人使完全地不区别的总称产品的贸易鼓胀。

This means that any board that supports Intel quad-core processors will require four adjustment potentiometers in order to modify all signal switching logic levels.

这意味着任何支持四核处理器的主板上都必须有四个可调整的电位器用来修改所有的信号交换逻辑值。

However, the reporting contents of the aviation information are much similar because the two kinds of taxonomy used in China and European Union are both designed according to ICAO standards. So, the exchange of aviation safety information between China and Europe is feasible from the contents of information.

笔者认为，虽然存在3种差异，但两个分类法都是基于国际民航组织航空安全信息分类法设计的，信息报告内容具有很大的相似性，因此，从信息内容上看，中欧进行航空安全信息交换是可行的。

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。