基于蚁群优化代理的移动Adhoc网络资源搜索研究

由于移动网络的动态拓扑结构,网络资源搜索过程又需要大量的信令分组和通信链路的支持,移动网络中 的资源搜索变得异常困难.通过分析移动网络中资源搜索的关键问题,提出了一种基于代理的网络架构,并在这种 架构上运用改进蚁群算法解决这些问题.该方法首先在移动网络中引入代理节点以确定网络拓扑,然后在这种引 入代理节点的网络架构中使用改进蚁群算法,同时利用全局和本地信息素来寻找资源.仿真比较了传统蚁群算法 和改进蚁群算法的资源搜索性能,仿真结果显示相对于传统蚁群算法,这种新算法在基于代理的移动网络中可以 大大提高移动网络资源搜索的效率.     

MANET的IDS中移动代理部署算法的研究

MANET(移动自组织网络)由于采用无线信道、分布式控制等原因,比有线网络更易受到安全威胁。MANET对带宽和计算量的敏感性使得移动代理成为MANET安全架构的首选。文中介绍了一种基于移动代理的MANET的入侵检测系统(IDS)模型。重点分析了该模型中的网络监测代理的部署算法,并基于已有的算法提出了一种改进算法———IDANMA(Improved D isposal A lgorithm forNetwork Mon itoring Agent)。IDANMA通过两轮投票选举在规定通信半径内可达节点最多的节点为网络监测代理节点。用NS软件对IDANMA进行仿真的结果表明,IDANMA有效地克服了已有算法的缺陷,通信开销更小,网络监测代理分布更均匀,算法收敛性好。     

双信道无线传感器网络移动代理路由算法

针对移动代理在信道竞争过程中的相互碰撞及相互抑制问题,提出了一种移动代理联合优化路由算法(MACORA).首先利用双层图模型将双信道无线传感器网络中的信道变换问题转化成双层图中的路由问题,进而可将寻路业务和数据传输业务分别放在双层图的控制层和数据层中同步传输,然后将双层图的控制层和数据层融合成一个双层网络,并在这个双层网络中为每个业务实时选路,最后充分利用不同网络层间的空闲信道资源来减少移动代理在信道竞争过程中的相互碰撞及相互抑制概率,达到降低网络堵塞率及数据包传递失误率2个目标.仿真结果表明,与动态传感器网络移动代理路由算法及无线传感器网络移动代理路由算法相比,MACORA算法能将数据包的传递成功率提高15%,并能有效降低网络的平均通信延迟.     

对等联网网络模式下运用移动代理实现的智能网络招聘系统

针对目前存在的网络招聘系统的缺陷 ,提出了一种新的基于对等联网网络模式 ,运用移动代理实现智能网络招聘系统的方案 ,并对系统的体系结构和技术特点作了深入的论述 .把对等联网 (新的网络模式 )与移动代理 (新的分布式计算方法 )运用于网络招聘系统中 ,是对新技术的一次尝试     

基于OpenFlow的光与无线融合接入网控制架构

为了有效提高光接入网网络资源利用率,满足不同用户差异化服务质量(quality of service,QoS)的业务需求,解决不同用户数据流量缺乏动态控制和智能调度的问题,提出一种基于OpenFlow的光与无线融合接入网控制架构。该架构通过部署OpenFlow代理,延伸了控制器的控制深度到光线路终端(optical line terminal,OLT)和光网络单元(optical network unit,ONU),设计了智能化控制权限的动态下放和回收机制,从而实现了功能的整体控制和资源的灵活调度。该控制架构能够以全局视角实时获取网络、用户及业务信息,根据网络状态以及网络资源的情况,动态灵活智能地制定和调整各个交换节点的数据处理规则,实现资源优化配置,可以有效提高网络资源利用率和满足不同用户差异化的业务需求。     

分布式移动代理网络管理研究

分析了当前复杂现代网络管理技术的现状,建立了一种分布移动代理网络管理系统模型,该模型主要为在单一代理情况下的代理理移服务.为了量化Agent的移动性,设计了一个移动Agent在一个域中成功完成任务的时间估算公式.     

无线传感器网络多代理平台中间件设计

针对基于移动代理应用模式在无线传感器网络中的设计实现问题,该文提出了一种基于静态代理的多代理平台模型和支持移动代理应用模式的传感器节点软硬件分层结构,阐述了移动代理模式在无线传感器网络中的应用优势,描述了基于静态代理的多代理平台和各静态代理的作用及协作过程.基于移动代理模式的应用说明了多代理平台能够便利地实现移动代理在无线传感器网络中的应用,最后通过客户端/服务器模式和移动代理模式应用对比,说明了基于多代理平台的网络具有较高网络重复利用率和应用灵活性优势.     

基于移动代理的多媒体网络QoS分布式关联监测方法研究

采用分布式监测机制来实现多媒体网络业务QoS(服务质量)保证是一个重要的研究方向。首先分析当前多媒体网络QoS分布式监测方法的相关研究;然后将移动代理技术引入QoS分布式监测方法,提出一种基于移动代理的QoS分布式关联监测框架;并以该框架为基础提出一种基于移动代理的QoS劣化网段定位方法。仿真表明了该方法的实时性和有效性,也表明提高了网络接口利用率和减少了网络时延。     

基于J-Sim的移动代理网络仿真研究

利用现有的移动代理模型结合J-Sim的技术特点,借鉴主动网络的思想,在J-Sim平台基础上通过扩展数据包、协议、添加移动代理模块的方法实现了移动代理网络仿真软件. 仿真实验证明,该仿真软件能够有效地仿真移动代理的行为和分析网络的性能,可以作为研究移动代理网络的仿真工具.     

企业新风

华为发布新一代网络架构华为日前在北京发布全球首个以业务和用户体验为中心的敏捷网络架构及全球首款敏捷交换机S12700,旨在满足云计算、BYOD移动办公、SDN(软件定义网络)、物联网、多业务以及大数据等新应用对更高可靠、大带宽、更大规模以太网的要求。通过这个以业务和用户体验为中心的敏捷网络架构,华为把SDN引入园区网络,让网络更敏捷地为业务服务。敏捷交换机S12700可以支持网络部署管理自动化、全网协同安全、灵活支持业务多变、全网可编程等功能,并由此引发新     

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.     

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.     

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.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.