查询词典 autocorrelation

Topological indexes of A , B , C and D were all obtained from the different combination of topological vertex degree. A QSAR equation for this series of compounds was established based on the multi-linear regression method and a new group of autocorrelation topological indexes. The results showed that the biological activity is linearly correlated with the volume and branching size of the quinclorac derivatives. Finally, new herbicide was designed based on all QSAR results.

针对应用经典结构参数和量子化学参数得出的结果不够理想的问题，对点价自相关拓扑指数进行了研究，建立了一组新型的点价自相关拓扑指数A、B、C、D；首次将该指数用于除草剂氯喹酸酯类化合物的定量构效关系研究中，建立了很好的定量构效关系方程，综合分析所有的QSAR结果设计出了潜在的新型除草剂氯喹酸烯丙酯。

Good results have been made from the application of the autocorrelation topological index to the QSAR study of organic chemicals.

将该类指数用于有机化合物分子QSAR研究，取得了良好的结果。

The new autocorrelation topological index was only dependent on the molecular topology, not on the experiment as the traditional index.

本文还对新的拓扑指数实现了矩阵化描述，并以此为基础开发出相应的计算机软件。

We shall conclude that autocorrelation fluctuate from period to period, and amplitude of correlation variation is decreasing and tending to zero. This implicate that the markt is coming more efficiency with the lapse of time, and the market efficiency is undulatory authentically.

检验结果发现，序列相关系数呈现波动性特征，但波动幅度随着时间的推移越来越小，向零收敛，这一方面证明市场效率的波动性，另一方面说明市场的渐近有效性。

The elements of each sequence in odd-periodic perfect almost binary sequence pair are "1" or "-1" with exception of a single zero element, and odd-periodic perfect almost binary sequence pair possess a perfect odd-autocorrelation function.

奇周期最佳几乎二进序列偶中2个序列中均有一个元素为"0"元素，其他元素取值均为"＋1"或"－1"，并且其奇周期自相关函数为单值脉冲函数。

Spatial autocorrelation and semi-variance analysis of GeoStatistics were used to study the patch scale structure of red deer (Cervus elaphus xanthopygus Milne-edwards)habitat factors during winter, and the relationship between patch scale structure and red deer distribution was revealed.

应用地理统计学的空间自相关分析和半方差分析技术，研究黑龙江省完达山地区冬季马鹿生境破碎化因子的斑块尺度结构，揭示了马鹿数量分布与生境因子斑块结构之间的内在关系。

Using the autocorrelation function, the principal of homodyne method is explored. The relationship between delay time induced by delay fiber and characteristics of additive frequency-domain fluctuation affixed on homodyne beat noise photoelectric-current spectrum are intensively analyzed.

一、利用自相关函数研究了零拍法测量激光线宽的原理，重点考察了零拍光电流谱线上所附加的频域周期性波动，确定了该波动的频域周期与光纤延时线所产生的时延成反比。

Auditory evoked magnetic fields in relation to the factors extracted from autocorrelation function and interaural cross-correlation function were examined by magnetoencephalography.

利用脑电磁图示的方法对听觉诱发磁场与由自相关系数以及由双耳互相关系数中导出的因子的关系加以检验。

Land use structure change and change of spatial autocorrelation based on Moran's I of land use degree of Guangzhou in 1990,1995,2000 and 2004 were analyzed in the paper.

摘 要：分析了1990－2004年广州市土地利用结构的变化和基于 Moran's I 的土地利用程度空间自相关变化。

The spatial structure of genetic diversity among 17 populations of Cryphonectria parasitica in China was investigated using RAPD markers with the spatial autocorrelation analysis.

应用空间自相关分析方法对中国栗疫病菌 17个居群 RAPD遗传变异的空间结构进行研究，以探讨栗疫病菌居群遗传变异的分布特征及其形成机制。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。