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This indicates that the series of prices of Yangtze River electric power stock is a fractal time series and presents obvious long memory .

5,这表明长江电力股票价格序列是一个分形时间序列,呈现明显的长记忆性特征。

Convergence and strong law of large numbers for positively associated sequences, negatively associated sequences has been deeply discussed in all kinds of paper.

各种文献中对PA序列、NA序列的收敛性以及强大数定律等已有深入研究。

This article gives some almost sure convergence properties for the partial sums of random variable sequence by using the strong law of large numbers, which were obtained by Hu.

本文利用胡舒合等获得的强大数定律,给出了随机变量序列部分和的一些几乎必然收敛性,并给出了结果在PA、NA和两两NQD序列场合下的应用。

In the empirical analysis part, statistical descriptions on the sample funds are made firstly, which show that the actual distribution of each sample fund"s daily net value return possesses the characteristic of leptokurtosis. So it is necessary to add student T distribution and GED to capture such leptokurtosis characteristic other than normal distribution. Secondly, ARCH test shows that there exists volatility clustering in each sample fund"s daily net value return, so GARCH related models should be used to describe such volatility clustering characteristic.

实证分析部分首先对样本基金进行统计描述,得出其收益序列均存在尖峰厚尾特征,不服从正态分布,因此有必要在下面的VaR计算中加入T分布和GED分布来捕捉这种尖峰厚尾特征;并且经ARCH检验后得出收益序列存在明显的波动聚集性的特征,因此可以选择GARCH类模型来描述这种特性,经过模型筛选,得出最适合我国开放式股票型基金的收益波动性模型为GARCH(1,1)模型。

Polymerase chain reaction amplification of a portion of a gene encoding a surface protein of Wolbachia was used to detect the Wolbachia infection of the population of Pteromalus puparum and Nasonia vitripennis by universal primers of wsp gene and the specific primers for wsp genes of A and B Wolbachia supergroup.

采用Wolbachia 的通用引物及A和B大组特异性引物对蝶蛹金小蜂Pteromalus puparum和丽蝇蛹集金小蜂Nasonia vitripennis体内Wolbachia的wsp基因进行PCR扩增及序列测定,并对测定的序列进行了同源性比较和基因特征分析。

Secondly, according to the theory of retrieving model using time series and the self-memorization principle, the grey self-memory model based on grey system theory and phase space self-memory model established using chaotic theory are put forward, and the two kinds of models are applied to the analogy and forecasting of hydrologic time series, and the application field of the self-memory model is further expanded from extent and profundity.

更进一步,根据时间序列反演建模基本理论和系统自记忆性基本原理,提出了基于灰色系统理论的灰色自记忆预报模型和基于混沌理论的相空间自记忆预报模型,并应用于水文时间序列的模拟与预测,从广度和深度上更加拓广了自记忆模型的应用范围。

Methods The phage displayed antigens of paragonimus were used to examine the sera of patients with paragonimiasis,schistosomiasis,trichinosis and healthy people,and their sensitivity and specificity were acquired;The templates of the mimic antigen were purified to determine the sequence and the sequence homology was analyzed by Blast.

方法建立肺吸虫噬菌体模拟抗原的ELISA,对肺吸虫病人、日本血吸虫病人、旋毛虫病人及健康者血清进行检测,分析其敏感性和特异性;提纯噬菌体模拟肽的DNA模板进行序列测定,以Blast软件分析其序列同源性。

Results The synthetic GnRH/TRS sequence consisted 90 nueleotides and showed a homology of 100% to that designed.

结果 GnRH/TRS序列由90个核苷酸组成,扩增产物与原设计序列同源性达100%。

It is considered that the DNA sequences and amino acid sequences of psaA are conservative, which is unadvisable to use for molecular interspecific classification ofthe genus Phaeocysitis.

因所获得的psaA基因片段序列及氨基酸序列具有种的极端保守性,不适宜用作Phaeocystis属种间的分子分类研究。

The test conclusions indicates that the long-term equilibrium relationship between SZZS series and its optimal series is not significant, but the short-term dynamic relationship is comparatively significant; since 2007, the ratio of variance to its mean is more than 0.4, which implies that SZZS is deviated from its optimal level to a great extent, which is the basic feature of bull market or bear market, and this also verify the robustness of these conclusions.

实证结论表明,上证指数序列与其均值序列的长期均衡关系不显著,但短期的动态关系比较明显;从2007年开始,上海股市的标准差/均值相当大,超过了0.4,这意味着上证指数偏离其均值的程度较大,这是牛、熊市的基本特征,这也印证了本文结论的强健性。

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