一种分布式动态负载均衡调度算法

目前计算机应用服务系统经常采用集群系统,负载均衡调度是集群系统的关键。在通用负载均衡调度算法的基础上,提出一种分布式动态负载均衡调度算法.该算法动态收集、统计和分析服务器的信息,以此为根据完成服务器负载均衡的任务,能够实现集群正常调度.在此基础上,采取分布式调度的策略,提高负载均衡调度的效率、性能,以使其对业务系统整体性能的影响最小。     

基于改进随机云滴法的云相似性计算

现有随机云滴法得出的相似度随云滴数目的增加而存在趋势性变化,以致无法给出较为稳定、合理的计算结果。为此提出了一种改进方法,对随机云滴法出现的趋势性变化现象进行了分析和讨论,给出了相关定理及证明过程。通过探讨问题产生的实质,忽略云滴数目,将相似度统一建立在云滴距离这一物理概念上,重新定义了相似度表达式。仿真实验的结果表明,改进方法能够获得相对稳定的相似度计算结果,有效解决了原算法相似度的趋势性变化问题,具有较好的适用性。     

基于短信增值服务的物流管理调度平台的建设

近年来随着国民经济的发展,物流业与电信行业迅速发展.文章通过对基于短信增值服务和物流管理调度的研究,架构了基于短信增值服务的物流管理调度平台.平台包括物流管理系统、运输公司指挥调度系统以及短信应用服务系统,这几套系统即可独立使用又可整合成一个大型的物流调度信息平台.整合后的系统在物流调度平台的基础上,建立一个基于手机短信和互联网的物流电子商务网络平台,对物流调度平台进行补充和完善.     

多核平台下一种新的实时调度模型

针对当前嵌入式多核平台下的实时调度模型没有考虑实时周期任务之间的制约关系这一不足,提出了一种能够描述实时周期任务之间存在简单制约关系的任务时序图(TTOG)模型,该模型不仅能体现任务实时性需求,还能反映周期任务之间的依赖关系.根据该模型,提出了一种剩余执行时间越短越优先(RETSF)的调度方法.该方法将根据某个周期任务距离时限的剩余执行时间动态地调整调度方案,与先来先服务(FCFS)算法相比较,在提高系统利用率,以及降低时限丢失率方面有很大改善.     

基于内容交换的分布调度集群系统研究

提出一种新的基于内容交换的分布调度方法,克服了单点失效问题,基本解决了其易成为系统瓶颈的问题.同时,由于采用分布调度方法,能够很好地均衡负载,从而提高了整个集群系统的并行服务能力.     

基于含熵期望曲线的云模型相关性度量方法

针对现有基于云模型的相关性度量方法缺少必要约束条件的问题,提出一种基于含熵期望曲线的云模型相关性度量方法．将云模型中超熵期望曲线的与区域和或区域的面积比作为相关性的度量基准,解决云模型的区间约束以及半云度量问题．利用3熵（3σ）约束增加云滴的聚集,减少计算开销．将超熵纳入计算,考虑云滴厚度对云模型相关性的影响．本方法克服了面向随机云滴的距离度量方法和数字特征变换方法中存在的计算复杂度高、结果不稳定的问题,同时满足了三类约束的实际计算需求．实验表明该方法能够客观有效地对云模型相关性进行度量,并在基于云模型的系统评价任务中得到了验证．     

云滴优化的路由选择方法分析

针对无线传感器网络(WSN)节点路由估计问题,提出一种云滴优化的估计方法.在考虑节点簇头传输延迟的情况下,建立精确的WSN路由估计模型,并在粒子滤波的框架内进行优化估计的实现.为了克服粒子退化问题,采用差分进化进行粒子优化选择,并通过云滴优化方法改善全局优化能力.对建立的通信模型进行了仿真分析,结果表明,该方法具有较高的节点剩余能量估计精度和节点生存能力,生存概率保持在90%以上.     

网络应用服务审计系统的研究

如何有效的收集网络应用服务的基本信息,是服务审计系统的一个难点.采用接人控制的方式,在每台服务器上强制安装信息采集控件,用于对各种网络应用服务信息进行采集并上报给审计服务器进行审计,用户接入网络前必须经过应用服务的审计,从而对众多的应用服务进行有效的管理.     

机场飞行区航空器与除冰车协同优化调度方法

针对现行“先到先服务”的机场除冰车调度方式效率不高的问题。以最小化除冰车行驶总距离和航空器等待总时间为目标函数,构建机位除冰车辆和航空器协同调度模型,并提出一种改进的遗传算法对模型进行求解。采用西安机场某天142条航班数据进行仿真实验,并与随机调度算法和贪心算法进行比较。结果表明,改进的遗传算法相较于随机调度算法和贪心算法分别节约15.23%和7.81%的行驶总距离,且航空器等待除冰时间大幅度减少。证明了所提算法在指导除冰车作业方面的优越性。     

基于遗传算法的集群虚拟机资源调度研究

针对集群虚拟机的调度问题,提出了一种基于遗传算法的调度方法.此方法根据虚拟机调度问题的具体情况构造染色体和初始种群,进而根据选择、交叉、变异操作衍生种群.在适应度函数构建过程中,充分考虑了虚拟机调度中对CPU、内存、带宽的资源利用率要求、调度时间需求和服务费用需求.实验结果表明,本文调度方法获得的调度结果在资源利用率和执行时间方面都具有明显的优势.     

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