一种流媒体不良信息实时监控技术的研究与实现

为了实现对网络上丰富的流媒体中的色情、反动等不良信息的实时监控,该文提出了一种综合了流媒体的流量识别和捕获技术、流媒体的文件重组技术、流媒体图像专频获取技术、图像识别技术和声音识别技术等技术的流媒体实时监控技术,开发了一种流媒体实时监控系统.系统运行结果表明本系统具有流媒体识别成功率较高、流量的截获及重组还原精度较高等特点.     

流媒体技术促进远程教育模式融合

随着网络技术、多媒体技术与通信技术的飞速发展,大量多媒体信息在网上的传输显得越来越重要,便产生了新型的传播媒体——流媒体.流媒体的出现彻底改变了传统因特网只能表现文字和图片的缺陷,它集音频、视频及图文于一体,使之成为未来因特网应用的主流.流媒体技术的产生与发展,必将对远程教育的发展产生重要影响.本文简要介绍了流媒体技术的基本原理、流媒体在网络中的传输格式,并介绍了流媒体技术的教学特点以及它在远程教育中的应用.     

流媒体技术在网络教学中的应用与探讨

流媒体技术是以流的方式在网络上传送多媒体数据的技术,是多媒体网络教学的主流技术.首先对流媒体技术进行简要介绍,然后详细讨论了流媒体技术在网络教学中特点、应用及存在的问题,最后对流媒体技术在网络教学的应用进行了展望.     

流媒体技术在网络中的应用与发展空间

从流媒体技术原理、流媒体传输的网络协议、流媒体相关技术标准、流媒体的发展空间等方面探讨了流媒体技术在网络中的应用与发展空间.     

流媒体技术及其格式

随着流媒体技术的发展及在广播电视领域的应用,使得广播电视在Internet上得以延伸和发展.本文介绍了流媒体实现的关键技术流式传输,论证了流媒体文件格式在流媒体系统中占有重要地位,分析了流媒体文件格式及其对流媒体服务器的影响.     

流媒体技术研究及应用

随着Internet的普及,各种各样的多媒体应用层出不穷,其中尤以流媒体应用最为迅速.本文主要介绍了流媒体系统的组成,流媒体关键支撑技术,分析了流媒体技术的优、缺点,并简要讨论了其在在线学习中的应用.     

基于校园网的流媒体系统方案探讨

随着流媒体技术的发展以及大学网络带宽的不断增加,极大地推动了流媒体技术在大学中的应用.本文主要从流媒体服务软件、网站及其服务方面进行分析,初步探讨在大学中流媒体系统建设的方案.     

流媒体技术及其在远程教育中的应用

介绍了流媒体技术,研究了流媒体技术的原理、传输协议和文件格式以及基于该技术的一个产品--windows Media Service,提出了流媒体在远程教育中的一个应用方案.     

基于Multi-agent的P2P流媒体分发技术的研究与实现

基于P2P方式的流媒体技术很好的解决了传统流媒体带宽不足的问题,从而得到广泛研究,但由于流媒体严格的时序性要求,使得P2P流媒体技术的使用存在瓶颈.提出了一种基于Multi-Agent的P2P流媒体分发技术,通过多Agent之间互相协作,可以有效的解决Peer服务节点的搜索定位和失效处理等问题.     

流媒体技术及其在学校教育中的应用

本文首先阐述了流媒体技术的一般概念,流式传输的基本原理以及媒体服务器硬件平台;其次阐述了流媒体技术的优势;最后主要介绍了流媒体技术的几种教育应用.     

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.