序列

Using the estimates of character sums over Galois rings and the trace de scription of primitive sequences over Zpe, we obtain an estimate for the frequency of the occurrences of any element in Zpe in one period of a primitive sequence, which is better than Kuzmin's results[1] if n ＞ 4e, where n is the degree of the generating polynomial of the primitive sequence.

范淑琴 ，韩文报文研究了Zpe上本原序列的元素分布。利用Ga，lois环上的指数和估计和本原序列的迹表示，得到了Zpe中各元素在本原序列的一个周期中出现频率的一个估计。当n＞4e时(n为本原序列生成多项式的次数)。我们的估计优于Kuzmin的结果[1]。

The primitive polynomial of 3-12 pseudo-random sequence generator is obtained after the deductions. The better nonlinear feedback function of all states pseudo-random sequence generator can be picked out according to the characteristic of pseudo- random sequence signal, then using all states of shifting counter through modifying the linear shift register feedback network to realize the all states pseudo-random sequence signal.

经过推导可以得到3-12 bit伪随机序列发生器的本原多项式，再根据伪随机序列信号的特性选择出较好的全状态伪随机序列发生器的非线性反馈函数，即通过修改线性移位寄存器的反馈网络将移位型计数器的全部状态加以利用，实现全状态伪随机序列信号。

In the thesis the theory of time series analysis, several models about time series analysis and the dynamic feature of time series analysis are expatiated in detail; how to use autocorrelation function and partial correlation function to judge the model is analyzed; a kind of better rule to determined rank is determined by comparing several kinds of determined rank; thereby the reverse function can be used to forecast.

本文详细阐明了时间序列的基本思想、几种常见的时间序列模型以及时间序列的动态特征；分析如何利用自相关函数和偏相关函数来对模型进行判定；通过对时间序列的几种定阶准则的比较，确定出一种较好的定阶准则来建立模型，从而利用逆函数法进行预报。

In order to get suitable binary sequences for key streams, binary generalized cyclotomic sequences of order eight on the two-prime residue class ring were considered. By means of the polynomial theory over finite fields, minimal polynomials and linear complexity of these sequences were obtained.

为了从剩余类环上的二元广义割圆序列中寻求满足需要的密钥流序列，考虑了双素数积剩余类环Z上的一类二元广义8阶割圆序列，利用有限域理论，给出了该序列在不同情形下的极小多项式，进而得到了它的线性复杂度。

First, the traffic flow time series chaotic feature is extracted by chaos theory. pretreatment for traffic flow time series, and the wavelet neural networks model was build by this. Second, the chaotic mechanism and the chaotic probability is described. Based on chaotic learning algorithm, and the wavelet neural networks fast learning algorithm of traffic flow time series is designed based on chaotic algorithm. Last, a single-step and multi-step prediction of traffic flow chaotic time series is researched by BP neural networks, wavelet neural networks and wavelet neural networks based on chaotic algorithm. The results showed that the wavelet neural networks predictive performance is better than the BP networks and the wavelet neural networks by the simulation results and root-mean-square value.

首先，通过混沌理论提取了交通流量时间序列的混沌特征，并在此基础上建立了小波神经网络交通流量时间序列模型；接着，阐述了混沌学习算法的混沌机理、混沌产生的概率，设计了基于混沌算法的小波神经网络交通流量混沌时间序列快速学习算法；最后利用交通流量混沌时间序列对BP网络、非混沌算法的小波神经网络以及基于混沌算法的小波神经网络进行了单步预测和多步预测，并对预测结果的仿真图和真实值与预测值的方均根进行了比较，结果表明基于混沌学习算法的小波神经网络的预测性能明显优于应用BP网络和非混沌算法的小波神经网络。

The results showed that Me-c84 shared 98% similarities with the 26S ribosomal RNA gene from Sarracenia purpurea, while M14-86 shared97% similarities with the 26S ribosomal RNA gene from Portulaca Grandiflora.

将已经获得的两条cDNA序列与NCBI网站上的GenBank数据库进行同源序列比对，结果显示Me-c84核苷酸序列与瓶子草等植物的26S核糖体RNA部分基因同源性达到98％。M14-86核苷酸序列与大花马齿苋等植物的26S核糖体RNA部分基因同源性达到97％。

According to the calculation results of some seismometry index of the aftershock sequences,the whole aftershock sequence could be divided into two sub-sequences,or the main event-aftershock sequence distributed in the Wenchuan area at the south-west part of the fault and the seismic swarm sequence with several large events of ...

根据对汶川地震余震序列的部分测震学指标计算，结果表明，汶川地震序列可能是由以绵竹为界，其西南段的汶川主-余震序列和绵竹北东段的北川-青川6级震群地震序列组成，汶川地震可能具有龙门山活动构造的继承性运动特点。

A pair of primers based on conservative sequences of Drosophila melanogaster was designed to amplify the p53 gene. The fragment with 1156 base pair was obtained and sequenced. The percent identity between others' and ours' was 99.4%, with the other biological sequence of p53 existing some differences.

从紫外刺激的果绳抽提总RNA，通过RT-PCR方法扩增得到有完整读码框的p53基因，并且通过对p53基因的序列分析表明，所得到的序列与网上已经登陆的果蝇p53序列有99.4%的相似系数，而与其他生物的p53序列存在一定的分歧。

Firstly got the sequence of the contour points with one pixel width of the image to be assembled.

首先求出待匹配图像单像素宽的轮廓曲线上像素点的坐标序列，然后利用轮廓上各点和与其相差六个点的像素点之间的位置关系及行列坐标差的平方代数和对轮廓进行表示，得到两轮廓曲线的表示序列后；接着采用寻找两轮廓表示序列的最长公共子序列的方法进行匹配，并在匹配过程中引入了"断点续配"的概念，有效提高了算法的容错性。

Because the special points can be regarded as features,and used as references in segmentation and alignment.This paper proposed an approach based on approximate string match to match the sequence of special points.

实现签名认证的方法大体上可以分为两类，第一类是从签名样本中提取一些全局参数作为特征，第二类则把签名样本的整个信号序列，如坐标序列ux，uy、压力序列up、速度序列uv等看作是时间的函数，把这些函数作为签名的特征[4~6]。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。