序列

372Bp mitochondrial cytochrome b DNA of blue fox, red fox, raccoon dog, and wolf were sequenced. Combined with the DNA fragments of dog, simien fox, and African wild dog, sequences were aligned and analyzed. There are 113 nucleotide sites substituted (30%).

通过对犬科的赤狐、蓝狐、貉和狼4种的线粒体细胞色素b约372bp DNA片段序列分析，结合GenBank中狗、西门豺和非洲野犬3种的该区段DNA序列的比较，共发现113个核苷酸位点存在变异(约30%)。

A time series data set is a sequence of random variables indexed by time.

时间序列数据是以时间为指标的一个随机变量序列。

In this work, we use three different randomized processes to test the result that native sequence have more negative free energy than random sequence.

在工作中，我们用3种随机方法验证了自然序列比随机序列有更低的折叠自由能。

A hybrid model of short-term load forecasting based on chaotic theory, correlation and neural networks is presented in this paper. Firstly, reconstruct attractors in phase spaces using chaotic theory, Secondly fit the attractor's evolvement using BP neural networks, because selecting neural network's input training data using Euclid distance and correlation, improve neural network's associative memory and ratiocinative ability, can better fit the attractor's evolvement.

提出一种将混沌理论、关联度和神经网络相结合的短期负荷预测模型，首先利用混沌理论重构负荷时间序列的相空间吸引子，然后用BP 神经网络来拟合空间吸引子的演化，由于使用空间欧氏距离和关联度联合来选取神经网络的训练样本，这样就提高了神经网络对负荷序列混沌特性的联想和泛化推理能力，能够更好的拟合吸引子的演化。

Firstly, reconstruct attractors in phase spaces using chaotic theory,Secondly fit the attractor s evolvement using BP neural networks, because selecting neural network s input training data using Euclid distance and correlation, improve neural network s associative memory and ratiocinative ability, can better fit the attractor s evolvement.

提出一种将混沌理论、关联度和神经网络相结合的短期负荷预测模型，首先利用混沌理论重构负荷时间序列的相空间吸引子，然后用BP神经网络来拟合空间吸引子的演化，由于使用空间欧氏距离和关联度联合来选取神经网络的训练样本，这样就提高了神经网络对负荷序列混沌特性的联想和泛化推理能力，能够更好的拟合吸引子的演化。

The typical Arithmetic Coding does not map a single source to a word, but maps the whole input symbol sequence to a section of 0,1 on the real number axis, the width of which is equal to the probably of the sequence. A representative binary fraction in the section is chosen as real output to get efficient compressed codes.

典型的算术编码不是将单个的信源符号映射成一个码字，而是将整个输入符号序列映射成为实数轴上0，1区间内的一个小区间，其长度等于该序列的概率；在该小区间内选择一个代表性的二进制小数，作为实际的编码输出，从而达到了高效编码的目的。

To obtain good trade-offs between complexity and performance on peak-to-average power ratio reduction in orthogonal frequency division multiplexing using partial transmitting sequence schemes,a trellis structure based PTS factor search method is proposed.

为了得到部分传输序列降低OFDM信号峰均比方案中复杂度和性能之间的良好折衷，提出了一种基于格形结构的部分传输序列因子的搜索方法。

The results showed that two reduplicate clones (clone 24 and clone 34) were found and the efficiency of different is 94.4%.

用DNAssist序列分析软件对测序结果分析比较，cDNA序列在GenBank数据库中进行同源性比较。

For an objective comparison, the iteration numbers of these methods are: MLEM with 32iterations, OSEM with 4-subset 8 iterations and 2, 4, 8, 16, 20, 40-subset and 20 iterations, RAMLA with 4-subset and 8 iteration and relaxation parameter 0.5 and 1.5, respectively.

本研究取Inveon microPET扫描小鼠的正弦图，以MLEM、OSEM及RAMLA重建，MLEM叠代次数为32次；OSEM序列子集阶层为2、4、8、20、40，叠代次数为8、20次；RAMLA因定松弛系数为0.5、1、1.5，序列子集阶层4，叠代次数为8次。

To sum up, main results of this study were listed as follows:(1) After analyzing the main factors affecting generalization function of neural network, and aiming at poor representativity of hydrologic time series samples, standardization method of transforming extreme was presented to deal with input sample of time series, which could make the input samples lie in the interpolation range of training samples even if they lie in the extension of training samples, so it improved generalization function of neural network and accelerates network convergence speed.

概括起来，本文取得的主要研究成果如下：(1)对影响神经网络泛化能力的主要原因进行了阐述，针对水文时间序列样本的代表性不好这一问题，提出了采用变最值的规范化方法处理时间序列输入样本，使神经网络的输入样本即使为训练样本的外延，规范化后也处于训练样本的内插范围，从而改善神经网络的泛化能力，并加快网络收敛速度。

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。