混合粒子群算法在地震波阻抗反演中的应用

为提高地震波阻抗反演的精度，提出了一种结合了混沌和遗传思想的混合粒子群算法。算法在搜索初期，加入了混沌思想，使算法具有了遍历性。在粒子更新过程中，又加入了选择、交叉、变异思想，增强了粒子之间的联系和粒子的多样性，使算法收敛速度更快，更容易跳出局部极值。针对模型对该算法进行了测试与对比，测试结果表明，该算法在反演精度上明显优于传统粒子群算法; 对算法的抗噪性进行了分析，在模型中加入15%噪声时，虽有一定误差，但符合度依然较好，表明本算法具有一定的抗噪声能力; 最后将算法用于实际地震资料，得到了良好的效果，表明本算法具有一定的实用价值。     

BP 算法的可视化研究与 BP 智能算法

本文利用算法的可视化技术，从ＢＰ算法的基本原理出发，分析、研究了梯度、共轭自适应算法的长与短，提出了共轭梯度自适应算法的设想，并在此基础上，利用模拟退火算法思路，构制了ＢＰ智能算法。最后对实际资料进行了多种算法的对比试算，证实了共轭梯度法和ＢＰ智能算法与原算法相比，提高了速度，增强了算法对不同对象的自适应性和智能性。     

改进的LS-DRMTCMA算法

针对TD-SCDMA系统的帧结构的特征，将Z．Rong（1996）提出的LS-DRMTCMA算法改进，提出了LMS-DRMTCMA算法．这种算法相对于LS-DRMTCMA算法大大降低了基站处理的运算量，并且提高了算法的实用性，仿真实验表明，该算法比原算法具有更低的误码牢．     

改进的非常快速模拟退火算法

在研究模拟退火机理分析的基础上，提出了一种改进的算法（MVFSA算法）的具体方案，目的是为了改进原算法（VFSA算法）中存在的缺陷，以提高算法的效率．在模型试验中，对改进后的算法与原算法的过程和结果进行了一系列的比较，发现改进后算法不仅保持了原算法全局寻优的优点，而且提高了算法的稳健性和效率．这就为模拟退火算法在更多方面的实际应用打下了良好的基础．     

基于关联规则算法的研究

本文主要介绍了数据挖掘中的关联规则，分析了关联规则中的主要算法，包括Apriori算法、FP-Growth算法以及CRApriori算法，并且阐述了各种算法的主要特点。     

自适应回波抵消器的算法分析与比较

在简单介绍回波产生背景及回波抵消器的基本原理后，详细阐述了当前普遍采用的各种自适应回波算法，并比较了各算法的性能，指出了各算法的适用场合．LMS算法是所有算法的基础，NLMS算法是对其的归一化，改进RLS算法则针对多重回波而言，变步长的LMS算法及MVS算法主要是对LMS算法的步长值由固定突破为因输入信号或误差信号而可调节的函数．     

基于Apriori优化算法的IDS模型研究

Apfiofi算法是数据挖掘技术中关联规则的经典算法，为了解决在入侵检测系统中使用Apfiofi算法进行模式匹配的低效率问题，提出了针对Apfiofi算法的优化，提出一种基于基于事务压缩和项目压缩的优化算法，该优化算法比Apriori算法具有明显的效率，提高了模式匹配的精度．     

智能搜索算法设计和分析

提出了人工智能博弈树搜索ＳＳＳ＊算法的两种改进算法ＢＳ＊和ＤＳ＊算法，给出了ＢＳ＊和ＤＳ＊搜索博弈树端结点的充分必要条件，由此证明了，如果能估计一个合适的上界，则ＢＳ＊算法优于ＳＳＳ＊算法．同时还证明了ＤＳ＊算法优于α－β算法．论述了ＤＳ＊算法搜索深度为奇数的博弈树时，在一般情况下也优于ＳＳＳ＊算法，且这两种算法都降低了存储开销．     

覆盖平面上给定点集的最小凸多边形的算法

研究求覆盖平面上给定的若干个点的最小凸多边形的算法．给出了两种算法，讨论了算法的基本思想，描述了算法步骤，得出了算法的时间复杂度．结果表明，算法的平均计算时间复杂度为平面上给定点的数量的线性函数，即为Ο（ｎｍ），在最坏情况下可为Ο（ｍ２）     

改进的遗传模拟退火算法在TSP中的应用

在介绍遗传算法和模拟退火算法的理论基础上，分析遗传算法和模拟退火算法的主要优缺点，提出了一种改进的遗传模拟退火算法。结合两种算法的优点，对其中的复制、交叉、变异操作进行了改进，并将该算法应用于TSP问题的求解之中。最后给出用该算法求解TSP问题的具体实现过程，并进行仿真实验，验证了该算法的有效性。     

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