序列性

Although many results have been obtained, there are still a number of very interesting questions about composition operators unsolved. There is much more to be learned about the collective compactness and convergence of composition operator sequences, compactness of various product of composition operators, cyclicity, closed range and spectra of composition operators in various settings. Commutants of composition operators seem to be very difficult to characterize. Only a little is known about their reducing invariant subspaces. There has been no work on C〓 algebras generated by composition operators.

尽管已取得如此丰富的结果，但是关于复合算子仍然有大量非常有意义的问题值得研究，例如：复合算子序列的总体紧性及收敛性、复合算子的各种乘积的紧性、复合算子的闭值域问题、复合算子在各种解析函数空间上的谱的描述、换位复合算子的刻画、复合算子诱导的不变子空间问题、循环复合算子的研究、由复合算子生成的C〓-代数的研究、不同解析函数空间之间的加权复合算子及复合算子半群等等问题。

The former need establish an asymptotic sequence, research domain, convergence and limit of the sequence.

Picard逼近法的要点是建立一个逼近序列，然后考察这个序列取值范围、一致收敛性和极限的存在唯一性。

The origin analysis on the source of hosts and terrains was carried out on the base of homology tree and phylogenetic tree founded in 19 isolates on their CP gene nucleotide sequences. The result showed that the gene types and clusters of Cucumber green mottle mosaic virus were not obviously related to the two factors.

对包括该分离物在内的19个CP基因核苷酸序列进行同源性比较和系统进化树构建，并结合寄主来源及地域来源进行LHP的起源分析，结果表明黄瓜绿斑驳花叶病毒不同分离物的序列分群和进化关系与上述两个因素无明显关系。

To assess support for the monophyly of East Asian endemic cyprinid taxa, we used the mitochondrial CO1 gene sequences for phylogenetic reconstruction of the family Cyprinidae.

2为探讨东亚特有鲤科类群的单系性以及其内部物种的系统发育关系，本研究将实验获得的线粒体CO1基因序列与GenBank中下载的序列相结合构建鲤科鱼类的系统发育树。

This paper considers existence of extreme solutions to first-order differential equations with a parameter by the method of lower and upper solutions with monotone iterations,and monotonic sequence is uniformly converged to the extreme value solution of nonlinear equation after being constructed.

文章利用上下解方法和单调迭代技术讨论了含有一个参数的微分问题极值解的存在性，通过构造单调序列使这个单调序列一致收敛于非线性方程的极值解。

Furthermore, the deduced amino acid sequences of PL1 and PL2 in common wheat were compared with the sequences of LMW-1(GenBank number Y18159)and LMW-2(GenBank number AJ007746)in durum wheat .

PL1与PL2的氨基酸序列比较显示，在N-末端和重复区域同源性很高；两者的主要差别在于：C-末端PL1编码的氨基酸序列有一段富含Q、P的16个氨基酸残基的缺失。

Equiprobability is an important character of random key quality,this paper analyzes the lack of frequency test in detecting equiprobability ,then puts forword a test method of random binary sequence in equiprobability .

等概性是随机密钥品质的一个重要特性，分析了频数检验在检测等概性上存在的不足，并提出了一种随机二元序列等概性的检验方法。

On the basis of analyzing the characteristic of the basic immune algorithm and utilizing the ergodic property of the chaotic sequence, an adaptive immune evolutionary algorithm combined with chaotic sequence is proposed and used at the training of the neural networks.

在分析基本免疫算法优化性能的基础上，利用混沌序列的遍历性，给出了一种嵌入混沌序列的自适应免疫进化算法，并将其应用于神经网络的训练中。

The main findings include:(1) the time series of sample returns are not normative;(2) the sample returns follow a Frechet extreme value distribution;(3) The EVT approach provides a more accurate static margin level while the EWMA approach is more suitable for setting dynamic margin level.

主要发现有：（1）样本收益率时间序列不符合正态性假设；（2）样本收益率时间序列服从 Frechet 极值分布；（3）我国国债期货保证金的静态设定应当采用 EVT 理论，动态设定应当采用 EWMA 方法。

To improve the performance of security,periodicity and equality,a finite precision chaotic sequence generator was designed based on the structure of digital filters.

为了提高数字通信系统中产生序列的保密性、周期性和均匀性，设计了一种有限精度非线性数字滤波器结构的混沌序列发生器。

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。