差分序列

Almost defference sets have strong relationship with binary sequences with optimal 3-level autocorrelation, which are of significant applied bachground. We constructed 2 new infinite families of almost difference sets by using cyclotomy; Perfect binary sequences and perfect binary sequences pairs are of significant theoretical value and applied background, they correspond to cycle Hadamard matrices and difference sets pairs respectively.

几乎差集与具有最优3级自相关二元序列密切相关，具有强烈的应用背景，我们借助分圆方法构造了几乎差集的两个新的无穷类；最佳二进序列和最佳二进序列偶有着重要的理论价值和应用背景，它们分别对应着循环Hadamard矩阵和差集偶。

It is shown that these two sequences converge monotonically to a unique solution of the finite difference system.

给出一类求解具时滞边界条件的时滞反应扩散方程的数值方法，证明了迭代序列的单调收敛性以及差分格式的收敛

As a result, quantile regression method is better than other methods in both measuring systematic risk and nonsystematic risk.

在度量非系统性风险方面，主要应用于度量市场风险，并与利用GARCH模型度量VaR的方法和历史模拟方法进行比较，通过后验测试，结果表明，分位数回归在模拟VaR序列方面更为准确些；而在系统性风险度量方面，无论是根据平均绝对离差指标还是方差指标来看，结果发现利用分位数回归计算的系数要优于普通最小二乘估计和M估计。

Time series model can simulate and predict the increase of Quercus variabilis population by the difference, periodic method.

时间序列分析可以通过差分、周期的方法，对植物种群的增长进行模拟与预测。

Both of them use the technique of fractional differencing to remove the long-range dependence in the time series.

首先它们都通过分数差分的方法消除时间序列中的长相关性，然后分别用模糊自回归模型进行建模或预测。

The mathematical expression between DOP and DGD is derived for arbitrary waveshape and Gaussian pulse. Then the relationship of DOP-DGD with different power splitting ratio, width of pulse, and amount of pluses is theoretically analyzed.

推导出了准单色光波情况下任意波形和高斯脉冲的偏振度的数学表达式，理论分析了高斯脉冲情况下分光比、脉冲宽度和连续脉冲个数分别对偏振度与差分群延时关系的影响，并用10 Gbit/s归零/不归零伪随机码序列进行了实验，实验证明了理论推导和理论分析的正确性。

After explaining correlation theory and its important features, the rescaled range analysis、modified rescaled range analysis and detrended fluctuation analysis are analysed. As for the drawbacks produced by the rescaled range analysis when faced with short term correlation, a modified rescaled range analysis based on short term correlation model is applied to Shanghai stock market and Shenzhen stock market. The result is explained and compared.

在阐述了分形时间序列的相关理论和重要特征后，对经典重标极差分析法、修正重标极差分析法和趋势消解波动分析法等一维分形分析方法进行了系统分析，针对重标极差分析法对短期相关会产生有偏结果的缺点，给出了一种基于短期相关的改进的重标极差分析法，把各种一维分形分析方法应用于上证综合指数和深圳成分指数序列进行实证分析，并对结果进行了比较和解释。

The paper consists of five parts. Firstly I carry on a review to the domestic and foreign scholars" research on the stock price manipulation, in the second part, the paper takes an objective analysis of the way in which china"s stock market is manipulated and the cause of the manipulation. In the third chapter, firstly I find that auto-correlation of time series of stock return and persistency of the GARCH model could be an index for speculative price by comparing the characters between the speculative price and non-speculative price presented by GARCH modeling, and then stick out that low β coefficient is an important symbol of stock price manipulation through empirical study.

本文的研究分五个部分，首先对国内外学者对股价操纵方面的理论和研究成果进行了回顾，在第二部分中结合中国股市的实际情况对中国股票市场的操纵手法及形成的原因进行了客观的分析，第三章首先通过比较非操纵价格与被操纵价格的时间序列GARCH模型的特点，证明被操纵价格存在序列相关，时变条件方差不稳定的特点，然后通过实证研究表明低贝塔系数是市场操纵过程中股价异动的重要标志。

Secondly, the pseudo-chaotic stream cipher based on searching plaintext in a pseudo-random symbolic sequence is analyzed, by several successful cryptanalytic attacks such as one-time pad attacks, bifurcation diagram attacks, entropy attacks, differential attacks and key recovery attacks etc..

第二章研究了基于搜索机制的数字混沌序列密码算法，并详细分析了包括一次一密攻击，分叉图攻击，熵攻击，差分攻击以及基于符号动力学的攻击方法。

It was presented that a dynamic retrieving differential equation mode of two-variable hydrologic time series considering one main cycle.

3提出一种考虑一个主周期的水文二元时间序列动力反演微分方程模式，并应用双向差分法和最小二乘法推导微分方程参数，给出求解公式。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。