系统树

In the fourth chapter, some general equations are studied, of which Abel equation and some equations that have been intensively studied are the special cases.

第三章利用Abel方程已有的结果来讨论多项式系统的极限环的存在性，个数和稳定性，推广了水树良和蔡燧林的相关工作。

So we can deductive the influence of environmental hormone to dendritic cells is one of the reasons that cause the immune system have aberrance.

所以可以推论环境荷尔蒙对树突细胞的影响，是造成免疫系统的异常的原因之一。

The accession number of this gene is EU590683. The sequence of this gene was arranged and analyzed with Mega software package having a phylogenetic tree built up in DNADist and Neighbor.

此外，采用Bioedit和Mega2软件构建了Fe-氢酶的NJ系统进化树，结果表明该Fe-氢酶基因与产气荚膜梭菌聚为一类。

Key words: Amanita; rDNA; ITS sequence analysis; classification and identification; Macrofungi

本研究在对采自浙江西南部丽水山区的7个鹅膏菌标本进行初步鉴定的基础上，对7个鹅膏菌的rDNA ITS区段进行序列测定和序列特征比较分析，并进一步对ITS序列进行核酸序列数据库GenBank同源性检索比对，构建起系统发育树以期为基于传统形态特征对7个鹅膏菌做出的分类鉴定提供分子依据。

Models for the electromagnetic interaction between the target and trunks or between the trunks and trunks are developed, and these models are used to derive the coherent fields scattered by the target and fractal forest. Then, the polarization angular correlation function is calculated by using azimuthal angular averaging, and used to detection target buried in forest.

本文用L系统对森林环境进行了理论建模；研究了有限长分层介质圆柱的树干散射模型；分析了倾斜粗糙地面上树干及分形树的电磁散射特性；讨论了环境对确定目标电磁散射特性的影响；研究了环境与隐蔽目标复合电磁散射，用角相关函数、极化角相关函数对隐蔽目标进行了检测。

The phylogenetic-tree analysis demonstrated that in Arachis the FAD sequence was conservative and highly homogenous to those in other species.

系统进化树分析表明，FAD序列在花生属植物进化过程中较为保守；与其他物种的FAD序列也具有较高的同源性。

Finally, an improved IDS using decision tree to implement protocol analysis is realized based on the typical NIDS Snort.

最后，利用典型的网络入侵检测系统Snort实现了改进的利用决策树进行协议分析的入侵检测系统。

After pathogenic fungi identified,we found 26 of them can cause cotton leaf spot. The 26 pathogenetic strains were carried out morphological and molecular identification of the firm. The initial identification of the pathogens is through the morphological observation such as the determination of growth, colony morphology, conidia and conidial stalk.

通过对生长量的测定，菌落形态，分生孢子和分生孢子梗等形态学观察进行形态学鉴定；通过PCR扩增真菌核糖体基因转录间隔区序列并测序，并将序列在GenBank上进行同源性比对和构建系统系统发育树等方法进行分子鉴定，鉴定出这26株真菌分属链格孢属、镰孢属、黑孢属、刺盘孢属、匍柄霉属等5个属。

As data object has been usually named in the one-dimensional space, the efficiency of traditional file system was very low to manage a large number of data object. After the linear hash Lookup algorithm has been adopted, the load factor controls splitting and merging.

由于数据对象是通常在一维空间中命名，传统文件系统管理大量数据对象的效率是极其低，采用线性哈希查找算法，由负载因子控制分裂和合并，与传统文件系统的树结构查找相比，哈希法查找时间复杂度为O(1)。

Neral contracts enterprises with indistinct and synthetical judgment method, analyze the main work of the general contracts enterprises with the theory of PAEI; the developing stage, build the value sharing chain of general contracts enterprises, and value sharing system, bring forward that the general contract enterprises must pay attention to develop the core value chain and the no core value chain; the leading stage, introduce the key competitiveness of the business ecosystem, analyze general contracts enterprises'the value of core value chain and enhance the key competitiveness of enterprises; the renewal stage, analyze update mode of business ecosystem and development trend of general contracts enterprises.

开拓阶段，以模糊综合评价法来选择总承包企业的伙伴企业，并且以PAEI理论分析了此阶段工程总成承包企业的工作重点；发展阶段，构建了工程总承包企业的价值共享树，建立价值共享体系，并且提出总承包企业要注意发展核心价值链和非核心价值链；领导阶段，介绍了商业生态系统的核心竞争力，对总承包企业的核心价值链进行价值分析，提高企业的核心竞争力；更新阶段，分析商业生态系统的更新方式和工程总承包的发展趋势。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。