基于无线MobileAgent的网格GIS模型及其实现

在对网格计算技术和移动智能体（Mobile Agent）分布式计算技术研究的基础上，提出了一种基于无线Mobile Agent的网格GIS模型。该模型集成网格技术、Mobile Agent、GPS、CD-MA、TCP／IP、UDP等技术，可以进行空间信息的网格计算、实时采集与移动服务和移动目标的实时监控，并且该模型在Visual C＋＋和eMbedded Visual C＋＋环境下从底层构建了网格计算环境下的Mobile Agent运行环境、网格GIS分布式服务器、Mobile Agent代理服务器和移动GIS客户端等模块，该模型在上海某区绿化网格化调查与管理应用中进行了试验，结果表明所提出的模型具有较好的灵活性和实用性。     

基于分布式Agent的网格任务调度模型研究

任务调度是实现高性能网格计算的基本问题。文章将分布式的概念引入多Agent技术,采用集中式和分布式相结合的管理方式,对Agent进行功能划分;提出了分布式Agent结构,描述了基于分布式Agent的网格任务调度模型,在此基础上,研究了分布式Agent在制造网格中的应用。     

基于移动Agent的分布式入侵检测系统设计研究

传统集中式入侵检测模型和系统存在诸多问题,无法适应分布式网络环境发展的需要,而利用移动Agent技术改进的入侵检测系统和解决方案则显示了其性能优势。从总结传统集中式的入侵检测模型和系统存在的问题出发,分析了分布式入侵检测系统中应用移动Agent的技术,设计了一种基于移动Agent的分布式入侵检测系统,并对系统进行了实例检测,验证了系统的可用性和有效性。     

数据驱动的多Agent装备器材保障决策支持系统

为提高复杂网络环境和任务需求下器材保障的智能化水平,提出了一个数据驱动的多Agent器材保障决策支持系统DSS(decision support system),系统中的数据、模型以及Agent可分布在不同的网络节点上,高层Agent可由粒度更小的子Agent或Agent部件组合而成;系统中的各类智能Agent相互协作,共同完成异构数据集成、多维数据集构造、器材保障模型挖掘、复杂规划问题求解,以及保障方案自动生成等任务,从而有效降低了系统开发的难度,提高了Agent协作的灵活性。研究结果表明,该系统架构能够显著提升器材保障决策方案的质量和效率。     

基于移动Agent的分布式入侵检测系统

介绍了几种常见的分布式入侵检测系统,针对目前入侵检测系统的不足,将新型分布式处理技术移动 Agent与入侵检测融为一体,提出了一种基于移动代理的分布式入侵检测系统(DIDS)的模型．系统采用层次 结构的探测和响应机制,各Agent相互独立,同时能在网络中自由移动、相互协作,以检测分布式攻击,并具 有良好的灵活性、健壮性和可扩展性．     

嵌套式移动Agent的形式化研究

应用任务Agent和巡航Agent构造了移动Agent分布式网络管理模型,采用进程代数方法p演算对该模型中Agent间的嵌套过程、交互行为和验证过程等部分行为进行了形式化的描述,从理论上验证了在大型网络中使用嵌套式移动Agent进行分布式管理的可能性.     

多Agent在万泉河防汛决策支持系统的应用

基于多Agent和Internet／Intranet的分布式专家系统(DES：Distributed Expert Systems)的体系结构，对DES中的Agent及其相互间通信进行了分类。采取Agent主动学习和基于范例推理的方法，实现了防汛决策系统的集成性和智能化。通过在海南省万泉河流域防汛决策辅助支持系统中的应用，说明多Agent的体系结构有利于降低复杂问题的协同求解难度，实现了专家知识的分布式处理。提高了系统辅助制定有效决策的能力。     

移动Agent在数字图书馆资源检索中的迁移策略

指出了将移动Agent用于信息资源的发现,可以较好地满足数字图书馆资源检索的要求,移动Agent的效率很大程度上取决于迁移策略的优化,提出了一种改进的分布式遗传算法,对多约束条件下移动Agent迁移策略最优问题进行了求解.实验结果表明:所提出的算法在求解速度和质量上取得了较大的改善.     

一种基于移动Agent的分布式入侵检测系统

由于当前单纯基于主机和基于网络的入侵检测系统的局限性,使得基于移动Agent的分布式入侵检测技术显得日益重要。本文从讨论基于主机和基于网络的入侵检测系统的局限性出发,阐述了分布式入侵检测系统和移动Agent技术,提出了一种基于移动Agent的分布式入侵检测系统模型,并对模型进行了详细分析和设计。     

移动Agent在分布式入侵检测系统中的应用研究

本文将移动Agent技术应用于入侵检测,在对入侵检测技术以及Agent技术深入分析的基础上提出了一种基于移动Agent的分布式入侵检测系统模型——DIDSBMA。DIDSBMA利用Agent的自治性、协作性、移动性等特点,有效的提高了入侵检测系统的可扩展性、检测速度以及检测的准确率。     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.