基于AI问题的一种"最优"解方法及实现

基于AI的搜索方法包括深度优先搜索、最低成本法搜索等,可以从众多的解决方案中寻找一个“最优”的解决方案。文章以列车信息搜索为例,采用路径删除法生成多种解,然后再用改进的深度优先搜索与最低成本法搜索相结合的方法从中寻找一个最优解。     

零成分搜索法的模拟分析

主要考察了零成分搜索法的模拟分析.首先简述了零成分搜索法的计算步骤,其次用一个模拟例子阐述了零成分搜索法的应用过程;最后模拟计算了零成分搜索法进行列显著性判断时所犯两类错误概率的大小.模拟分析结果表明,零成分搜索法不仅可以较好地识别不显著列,而且对误差方差的估计也有不错的结果.     

已排序数组三分搜索法的研究

二分搜索法在已排序数组中搜索某给定数时有着较重要的作用,但二分搜索法并未很好地利用已知数组的信息,本文对二分搜索法进行分析,给出三分搜索算法,并对两种算法进行比较.     

一种基于传统全搜索法的运动估计改进算法

提出了一种称为准全搜索法的块匹配改进算法。该算法在传统全搜索法的基础上引入了差值块DCT系数为0的判断条件,在螺旋搜索的遍历过程中可以最快地搜索到满足条件的匹配块,在大大提高搜索速度地同时也保证了一定的搜索精度。     

基于混沌变量的模式搜索法及其应用

提出了基于混沌变量的模式搜索法.在探索移动中,由混沌遍历性来生成移动方向和步长;在模式移动中,针对粗搜索与细搜索分别采取最优一维搜索和直接模式搜索.将全局优化能力强的混沌优化融入到模式搜索法中,且采取二级模式移动,搜索效率高.算法应用于模糊神经网络权值优化,仿真验证了其优良性能.     

基于Powell搜索法的简化微粒群算法

利用Powell搜索法求解精度高、收敛速度快和局部强搜索能力强等优点,在简化微粒群算法的基础上,结合Powell搜索法,提出一种新型简化微粒群算法—Powell-SPSO算法.改进算法将Powell搜索法融合在简化微粒群算法中,让Powell搜索法与简化微粒群算法进行交替搜索.同时微粒的迭代利用了Powell搜索法的强搜索能力,使得算法改善了简化微粒群算法因每个微粒采用相同迭代公式进行进化而造成的微粒间的弱差异性,避免了易出现早熟、搜索速度慢等缺点.仿真结果表明,与标准微粒群算法(PSO)、简化微粒群算法(SPSO)、文献[10]算法相比较,不论是对高维函数还是低维函数,改进的算法都能够有效地避免早熟问题,并能显著地提高收敛速度和收敛精度.     

一种适用于低码率图象压缩的运动估计算法

三步搜索法已经广泛地应用于低码率图象压缩中．由于三步搜索法第一步过于粗糙,容易陷入局部最小,对于那些小的运动矢量往往效果不太好,在此基础上提出了新三步搜索法,它在一定程度上弥补了三步搜索法的不足．针对低码率图象编码的特点,提出了一种新的运动估计算法,它具有与新三步搜索法相当的效果,速度上比新三步法和三步法有较大的提高．     

直接搜索方法的改进

本文提出一种六分搜索法。与DSC法相结合。提供了对于连续函数的最有效而且可靠的一维直接搜索方法。对于离散变量函数的一维搜索,按Fibonacci数增、减步长是一种有效的直接搜索方法。改进方法的计算程序简单,可用于某些n维直接搜索法之中。     

一种基于传统全搜索法的运动估计改进算法

提出了一种称为准全搜索法的块匹配改进算法。该算法在传统全搜索法的基础上引入了差值块DCT系数为0的判断条件，在螺旋搜索的遍历过程中可以最快地搜索到满足条件的匹配块，在大大提高搜索速度地同时也保证了一定的搜索精度。     

一维搜索的双切线法和双割线法

本文将函数负梯度的概念应用于一维搜索中,提出了一维搜索的新方法——双切线法和双割线法.特别是双割线法与0.618法和抛物线插值法相比.可使一维搜索的效率明显提高.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that