IP服务质量及其实现方案

随着IP业务的飞速发展，IP QoS成为实现多业务网络的关键技术。介绍了IP QoS的概念，讨论了IP QoS的实现方案，并重点列举了国际上主要标准组织IETF在IP QoS方面建议的一些服务模型和机制。     

移动全IP网络电话实现的一种方案

提出移动全IP(Internet Phone)网络电话实现的一种方案．介绍了移动节点快速切换链路时在移动节点和基站之间的QoS保证和在移动IP上提供端到端的QoS机制．通过在网络中实现QoS的服务来防止传输延迟、抖动和包丢失，满足IP电话业务对于实时性的要求。     

IP QoS体系结构综述

简要说明了IP QoS含义,针对集成业务、区分业务、多协议标签交换、业务量工程以及约束路由等方案,重点探讨了在IP网络上支持IP QoS的体系结构,提出了今后的发展动向。     

IP QoS体系结构综述

简要说明了IP QoS含义,针对集成业务、区分业务、多协议标签交换、业务量工程以及约束路由等 方案,重点探讨了在IP网络上支持IP QoS的体系结构,提出了今后的发展动向。     

IP网络QoS技术浅谈

传统IP网络所提供的尽力而为的服务不能满足当前网络中不同业务的QoS需求,文章综述了IP网络中保证业务QoS的两种策略,对这两种策略的共同基础、业务感知技术进行了分析,并对网络QoS技术的发展方向提出了自己的看法。     

IP网络服务质量控制的策略与机制

伴随着Internet网络规模和容量的爆炸性增长,人们的生活与工作方式正发生着深刻的变革,电子邮件、网上游览和下载已成为普通人生活中的一部分;与此同时,各种基于Internet的新型业务不断涌现,网络经济已初现端倪。在这种情况下,Internet或更广义地说IP网络如何提供QoS已成为世人关注的焦点,在分析和研究了IP网络中各种QoS机制及两种QoS服务模型后,探讨了一种IP网络中的QoS实现策略。     

IP网服务质量标准研究 

目前，IP QoS研究是个热点，国外各个标准组织竞相开展IP QoS标准化工作。我国各运营商在完成骨干网的建设后，也面临在IP网上提供QoS保障业务的急迫需求。在跟踪国外IP网QoS标准化工作进展的基础上，结合自身研究，对我国在IP QoS方面应做的工作做了探讨，并提出了符合中国国情的相关标准建议。      

MPLS网络的QoS及其管理框架实现方式

论述了MPLS网络的两种QoS技术:MPLS流量工程以及结合IP QoS体系，并指出DiffServ和流量工程技术相结合可以在MPLS网络中很好地保证业务的QoS。以这一技术为基础，在管理层面提出了相应的MPLS网络QoS管理框架及实现方式。     

IP网络QoS机制与SLA保证

近年来,关于IP网络提供QoS的各种技术与机制逐渐成为研究的热点,本文首先讨论了IP QoS的结构与机制,重点讨论了综合业务(Int-Serv)及区分业务两种结构模型(Diff-serv),然后介绍了MPLS技术,最后给出了两种适合电信运营商采用的保证QoS/SLA的方案。     

MPLS网络的QoS及其管理框架实现方式

论述了MPLS网络的两种QoS技术：MPLS流量工程以及结合IP QoS体系，并指出DiffServ和流量工程技术相结合可以在MPLS网络中很好地保证业务的QoS。以这一技术为基础，在管理层面提出了相应的MPLS网络QoS管理框架及实现方式。     

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.