序列性

The nucleotide and amino acid homology of the 5 isolates is higher than 94% and 96% respectively.

PRSV 5个分离物核苷酸序列的同源性在94%以上，氨基酸序列的同源性在96%以上。

The results show that all the hmgr genes from pigs, cattle and chickens are astable enzyme proteins with the same gene sequence characteristics and encoding protein and physical and chemical properties; all the amino acid sequences have a high degree of homology, containing two conservative HMG-CoA binding motifs and two NADPH binding motifs; all the amino acid sequences, containing signal peptide, are secreted proteins; they are all hydrophobic transmembrane proteins with five transmembrane domains; random coil and α-helix are the main structural elements in the HMGR polypeptide chain; all the predictions of three-dimensional structure are V- shaped; there are more closer evolution relationship between the HMGR gene from pigs and cattle.

结果表明：猪、牛和鸡HMGR基因序列特点及编码蛋白质理化性质基本相同，均属不稳定类酶蛋白；保守结构域氨基酸序列具有高度的同源性，均含有保守的2个β-羟基-β-甲基戊二酸单酰辅酶A结合基序和2个还原性烟酰胺腺嘌呤二核苷酸结合基序；均有信号肽，属分泌型蛋白质；属于跨膜的疏水性蛋白，均有5个跨膜结构域；无规则卷曲和α-螺旋是HMGR多肽链中的主要结构元件；三维结构预测都呈"V"字形；猪和牛HMGR基因的进化关系最近。

This dissertation is concerned with some problems regarding the asymptotic property of nearest-neighbor density estimator for α—mixing and nagetive quadrant dependent samples. The results extend the corresponding theorems in i.i.d.

本文主要考虑了最近邻密度估计在α—混合序列和两两NQD混合序列情形下的大样本性质，推广了独立同分布和其它相依情形下最近邻密度估计的大样本性质，如相合性、渐近正态性等。

The sequence analyzing revealed that a sequence with a total length of 861 bp including 842 bp nucleotides of ATPase8 ATPase6 gene and partial sequence of the mitochondria CO Ⅱ was cloned. The ATPase8 and ATPase6 genes of Columba livia were proved to have good homology(88.1%~75.0%) with the other 5 species of birds recorded in the GenBank and it has 88.1% and 86.5% homology with Streptopelia orientalis.

结果表明：克隆得到了家鸽ATPase8-ATPase6基因842 bp及COII的部分序列共861 bp，用DNA分析软件对家鸽ATPase8和ATPase6基因与Genbank中的5种鸟类的ATPase8和ATPase6基因序列进行比较分析，表明家鸽与其他5种鸟类的ATPase8和ATPase6基因具有较高的同源性(88.1%~75.0%)，其中与山斑鸡的同源性最高，分别为88.1%和86.5%。

There are mainly four innovations made in this thesis: By introducing the notion"collectively compact operator sequence"into the study of composition operators, we give a sufficient and necessary condition on generalized Nevanlinna counting functions of the inducing maps for {C〓} to be collectively compact, extend some previous results and enrich the content of the study of composition operators.

本文主要在以下几个方面有所创新：第一，把逼近论中的算子序列总体紧性的概念引入到复合算子理论的研究中来，并通过值分布理论中的广义Nevanlinna计数函数给出了Hardy空间与加权Bergman空间之间的复合算子序列的总体紧性的刻画，从而推广了Shapiro的结果，丰富了复合算子理论的内容。

In the prediction of protein structural classes, the residue order along the sequences takes an important role; while as in the prediction of protein subcellular locations, the amino acid composition is the most important factor.

在蛋白质的亚细胞定位预测中，氨基酸组成仍然是最重要的特征，蛋白质的亚细胞位置与序列同源性的关系没有结构与序列同源性的关系强。

If the Landweber method and pre-iteration method were convergent, the residue sequence would be monotone decreasing. By analyzing the convergence, the fact is demonstrated that for the severe ill-conditioned matrix of sensitivity coefficient, because of the limitation of the precision of the computer, the residue sequence is not monotone decreasing; thereby the reconstruction images diverge from the true distribution of the conductivity. So the generalized inverse method with threshold is established and the selection way of the regularization parameter is presented, by which the better images are reconstructed.

Landweber法和预迭代法收敛，则其残差序列单调递减，通过对它们的收敛性进行分析，证实对于病态性严重的灵敏度系数矩阵，由于受计算精度的限制，迭代过程中的残差序列不再单调递减，从而导致重建图象偏离实际电导率分布，因此作者建立了带阈值的广义逆算法，提出了规则化参数选择方法，获得了较好的图象重建质量。

Sensitivity comparison between the novel one-step RT-PCR and DAS-ELISA for PVX revealed that the former method was 20 times more sensitive than the later one. The novel one-step RT-PCR system was also successfully tested with field samples of turnip mosaic virus in 8 different crucifer vegetable crops.

为验证该设想，本研究建立了一步RT-PCR技术扩增体系，并利用该体系扩增和分析了国内几种蔬菜作物部分CMV分离物的2b基因序列同源性，选择特定分离物的全长2b基因，先利用PVX侵染性载体初步分析其正义和反义序列间的互作，再构建植物表达载体转化烟草和番茄，并研究转基因烟草抗CMV的表现，获得了抗CMV的转基因烟草植株。

The deduced amino acid sequence of Carassius auratus gibelio had high similarity with that of Carassiu auratus,Danio rerio,Ictalurus punctatus,Oncorhynchus mykiss and Takifugu rubripes. The similarities were 92%, 88%, 79%, 75% and 72%,respectively. The full-length TLR3 of Carassius auratus gibelio contained a signal peptide in the first 21 amino acid residues, 15 leucine-rich regions from 50th to 695th amino acid residue, a transmembrane region from 704th to 726th residue, a Toll/IL-1R homologous region from 754th to 897th residue.

经序列同源性分析显示，其编码的氨基酸序列与金鱼Carassius auratus］、斑马鱼、斑点叉尾鮰、虹鳟和红鳍东方鲀有较高的相似性，其相似性分别为92%、88%、79%、75%和72%，说明TLR3在长期的进化中具有较高保守性。

Secondly,by reduction to absurdity and the sequentially compactness of the space,the minimality of a homeomorphism on a sequentially compact space is discussed.

其次，利用反证法结合空间的序列紧致性对序列紧致空间上的同胚映射的极小性进行讨论。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。