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The more the absolute value of entropy is, the more the structure of system is out of order.

从熵定律角度来研究城市发展,可以帮助我们建立一种新的城市发展观。

In the first approach the metadata extraction is viewed as a classification problem. Three statistic classification models, including Support Vector Machines, Perceptron with Uneven Margins, and Maximum Entropy are studied. The approach suffers from the problems of ignoring the variance in lengths of documents and ignoring the dependency of text units within documents. To solve the problems, our second approach takes the metadata extraction as a sequence data labeling problem and makes full use of the sequential information.

论文首先研究了基于分类的元数据抽取方法,考察了支持向量机、非对称间隔感知机和最大熵模型在ADME中的应用;然后针对分类方法中存在的忽略文档之间的差异、不考虑文档上下文等问题,提出了基于序列数据标注模型的抽取方法,并结合最大熵马尔可夫模型、投票感知机模型和条件随机场模型进行了研究;最后本文根据前两种方法的设计思想和优缺点,研究提出一种新的结构预测模型—— CDASP(Coordinate Descent Algorithm for Structure Prediction),并将其应用于元数据的自动抽取中。

Firstly, we consider the problem of the representation formula for the transition probability density of a right process under Girsanov transform. Secondly,we consider the problem of the MEMMs (minimal entropy martingale measure)for Markov switching Levy processes, and justify that the minimal entropy martingale measure is obtained by some regime switching Esscher transform. At last,we consider the problem of the invariant measure and the ergodic property of recurrent right processes. This paper includes 5 chapters.

首先,我们考虑了满足一定条件的右过程在Girsanov变换下的转移概率密度的表达式问题;其次,我们考虑了由Markov调制的Lévy过程的最小相对熵鞅测度的问题,证明了其最小相对熵鞅测度是某个状态转换Esscher变换;最后,我们考虑了右过程的不变测度及其遍历性的问题。

The batch seeded isothermal desupersaturation experiments of SPM in aqueous solution were carried out and the overall crystal growth kinetics parameters were determined by the nonlinear optimization techniques. Assuming that the volume diffusion rate at growth is equal to the mass transfer rate at dissolution under the same conditions, the two-step crystal growth rate parameters can be determined. At the fow supersaturation, the surface integration rate is proportional to relative surface supersaturation.

通过测量螺旋霉素均相成核动力学,获得了表面能的值,估算出表面熵因子的值在1.41~1.56之间,从而可以推断出螺旋霉素晶体生长的表面反应速率同表面相对过饱和度成线性关系,这种生长机理同第四章得到的结果是相吻合的;利用估算的表面熵因子的值,把螺旋霉素晶体看作为简单的立方科瑟尔晶体,根据能量最低原理,对螺旋霉素的晶体生长进行了模拟。

Then, according to phase space reconstruct technique from one-dimensional and multi-dimensional time series, the quantitative criterion and rule of system chaos which combine neural network, analyses, computations and sort are conducted on EEG signals of five kinds of human consciousness activities. The author finds that statistic results of the determinism computation in time series indicate that chaos characteristic may lie in human consciousness activities, and central tendency measure is consistent with phase graph, so it may become one division way of attractor; approximate entropy of different subjects exists discrepancy; correlation dimension and Lyapunov exponent of different consciousness activities indicate that attractors of human activities are all fractional; nonlinear quantitative criterion and rule, which unites neural network, can distinguish different styles of consciousness activity in principle, and the result of sortation takes on that consciousness activity type of arithmetic is distinguished more easily than that of abstract.

采用一维与多维时间序列相空间重构技术和系统混沌的定量判据准则,结合神经网络,对五种思维作业方式的脑电信号进行了分析、计算与分类,发现确定性计算的统计结果表明人类的意识活动中可能蕴含混沌特性,中心趋向测量(Central Tendency Measure,CTM)与相图吻合较好,可作为EEG吸引子的区分方法之一;功率谱分析反映出单个受试者的各种意识形态的差异很小,但是不同意识活动谱中的活跃频段还是略有差异的;个体之间的近似熵存在差异,同种状态下近似熵大的人可能具有更好的创新性;关联维数和Lyapunov指数的计算结果表明大脑的运动落在具有分维的奇怪吸引子上;非线性量化方法与神经网络相结合,可对人脑思维活动进行较好的分类,并且从分类结果来看数理计算类思维活动较抽象类思维活动有着更好的区分度。

The experimental results show the validness of the mechanism analyses.2. According to the generation mechanism of the leak acoustic signal, the characteristics of the leak acoustic signal are investigated. The auto correlation technology is adopted to descript the leak signal characteristics due to the ability to analyze the coherence of time series. A new procedure to identify the leak acoustic signal from the disturbed noises is proposed based on the conjunction of correlation and approximate entropy algorithm.3. The principle and application in leak location of the correlation and the adaptive filter techniques are introduced. The problems of the traditional leak location methods are analyzed.4. In order to establish the leak detection signal model, the leak acoustic propagation characteristics are investigated experimentally.

从泄漏声产生机理出发,分析了管道泄漏处湍流拟序结构与空泡间相互作用的机理,认为在该机理作用下,泄漏声信号产生过程具有&不可重复&的特征;由于相关函数具有分析时间序列拟序结构的能力,且近似熵从统计的角度区别时间过程的复杂性,因此,提出将信号相关分析和近似熵理论相结合的方法,提取泄漏声信号&不可重复&的特征,辨识管道泄漏故障发生;在实际检测现场,由于各种管内和管外固定声源噪声(如阀门噪声、工地施工噪声等)常导致泄漏误判和漏点定位错误,重点分析了管内固定噪声源的产生机理和特征,为复杂干扰环境下的泄漏辨识提供理论支持。

Studies on complexity reveal that the existence of human being and the development of society is a complex evolving process during which many factors are interweaved such as sequence and disorder, permanent disintegration and reorganization, harmonious "noise", entropy and minus-entropy. The real world is a "possible domain" consisting of a number of possible state and relations of possible transformation, it is a group of possibility.

复杂性研究表明自然世界、人类的存在和社会的发展是有序与无序、永恒的解体和永恒的重组、和谐的&噪声&、熵和负熵之间相互交织的复杂性演进过程,现实世界是一个由若干可能状态和可能转换关系组成的&可能域&,是诸可能性的集合。

By doing these, the theory of effective classroom teaching would be afforced and fully developed.

一方面,对熵理论在初中化学课堂有效教学的应用研究是对有效教学理论的丰富和发展;另一方面应用熵理论指导初中化学教学实践,在教学过程中充分把握初中化学教学系统的开放性特征、非平衡特征、&自组织&现象进行初中化学有效教学,将有助于我们进一步改善教学方法,优化教学手段,真正意义上实施有效教学,从而提升学生的化学科素养,充分发挥学生的潜能,促进初中新课程的顺利实施,推进素质教育。

The force is dominated by entropy force when the chain isdeformed less than 0.9 of the full-extended chain, while by enthalpy force. Theenthalpy force is contributed by the intro-molecular interaction. Bond stretchcontributes to the force more than bond angle bend. Torsion and VDW contributelittle to the force.3. The internal energy contribution to the elastic force It is in dispute that whether 〓 is dependent on the strain, and it is hard toresolve the problem using present elastic theories because they are athermal.

我们模拟了聚乙烯模型聚合物的SMFS,研究了链长、势能有效距离和温度对力谱的影响,探讨了力谱的本质问题,得到以下结果:改进的分子动力学方法可以很好的模拟聚合物的SMFS;SMFS是链段的性质而不是整个高分子链的性质,对于聚乙烯,该链段碳原子数目大于40;SMFS的本质是熵弹性,形变小于全伸直链的0.9时,力为熵弹力;形变超过全伸直链的0.9时,能弹力占主导地位,这种能弹力完全是分子内相互作用引起的,是由键伸缩和键角弯曲贡献的。3。

For the first time, we investigated the possibility of using non-minimal coupled scalar field (include Real and Complex scalar fields) as the candidate of dark energy---Quintessence or Phantom. A cosmological model droved by real scalar field with accelerating and decelerating, forever cycling and expanding was constructed. Classical and quantum wormholes with Tachyon fields were discussed in detail. The entropy of sphere symmetric black holes due to arbitrary spin fields was studied, and the proportional relations between entropy and fields degeneracy was derived. For the first time, we investigated the neutrino quasinormal modes of stationary black holes in the background of de Sitter space-time, and the quasinormal modes of Schwarzschild black holes with arbitrary spin fields. We also studied the quantum teleportation in the background of curved space-time for the first time.

中文摘要:我们首次研究了非最小耦合标量场作为宇宙暗能量-Quintessence、Phantom的可能性;构造了一个实标量场驱动的加速-减速无限循环,永恒膨胀的宇宙模型;详尽讨论了具有Tachyon场的经典和量子虫洞;研究了一般球对称黑洞缘于任意自旋量子场的熵,给出了熵与量子场简并度之间的正比关系;首次研究了deSitter背景时空下具有中微子场的稳态黑洞的似正规模与具有任意自旋场的Schwarzschild黑洞的似正规模问题;首次研究了弯曲时空背景下的量子通讯问题。

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推荐网络例句

However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.

然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口,替代木托盘,免薰蒸,符合欧盟、北美各国对出口货物包装材料的法令要求;喷涂钢托盘适用于重载上货架之用,托盘表面根据需要制作成平板状、波纹状及间隔形式,满足不同的使用要求。

A single payment file can be uploaded from an ERP system to effect all pan-China RMB payments and overseas payments in all currencies.

付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。