Research on fast real-time adaptive audio mixing in multimedia conference   总被引：2，自引：0，他引：2  

樊星  顾伟康  叶秀清 《浙江大学学报(A卷英文版)》2005,6(6):507-512

INTRODUCTION As one of the main applications in Packet-based network (PBN) environment, multimedia communi-cation is developing rapidly, with many service pro-viders starting to offer new services. Audio interactive operation is one of the most basic components in multimedia conference. Because of absence of QoS mechanism in most application environments of PBN, network blocking will cause problems such as data loss and audio jitter in end-to-end communication (Yang et al., 2001). Th…  相似文献   

环境建设中的技术与艺术融合--河北软件职业技术学院校园规划与设计问题剖析讲座     

张英武 《河北软件职业技术学院学报》2003,5(4):27-29

本文系作者通过河北软件职业技术学院校园规划与设计问题的剖析,较全面、准确地总结了规划与设计中的优缺点,从而阐述了环境建设中技术与艺术融合的必要性和重要性,为今后的规划设计工作提供了宝贵的经验教训,同时作为学术讲座讲给学生,成为一次生动的现场教学.  相似文献   

商系统的周期稠密性、混沌性以及拓扑混合性     

邓义华 《衡阳师范学院学报》2006,27(6):11-13

设(X,f)是一个拓扑动力系统,X/R是X的一个商空间,那么由f可诱导出一个连续映射F:X/R→X/R,从而得到一个动力系统(X/R,F),本文称这样的系统为商系统。文中讨论了一个动力系统与它的商系统的周期稠密性、混沌性以及拓扑混合性之间的相互关系,得到了这些性质分别是相互等价的等结论,从而得到了研究动力系统混沌性的一个重方法。  相似文献   

新规范下长短深层搅拌桩在工程中的应用分析          下载免费PDF全文

娄永忠 《惠州学院学报》2007,27(3):91-95

以惠州一建筑工程为例, 分析了新规范下长短深层搅拌桩在高层建筑中的应用, 对影响深层搅拌桩在高层建筑中应用的几个关键问题进行了论述, 并采用Ansys 系统对桩体的受力进行了分析, 并讨论了垂直荷载沿桩体的分布规律。  相似文献   

混合Flow Shop调度问题的遗传算法求解     

王结南 《鄂州大学学报》2005,12(3):28-30

该文构造了一种新的遗传启发搜索算法，用于求解混Flow—Shop调度问题，通过分析和实例计算表明，该算法能够有效地适用于大规模加工过程中调度问题的优化计算，在运行时间、适应性和最优率等方面都具有很好的搜索优势。  相似文献   

对中国金融业混业经营的有关探讨   总被引：2，自引：0，他引：2  

许晓云 《广东广播电视大学学报》2005,14(1):89-91,97

混业经营是目前发达国家金融业普遍的经营方式和全球金融业的发展趋势。本文从我国金融业目前分业经营的现状出发，探讨我国改革金融体系，逐步向混业经营转变的必要性和可行性，并提出要从多方面做好相应配套措施的改革、调整工作的建议。  相似文献   

不锈钢氩氧脱碳精炼过程的物理和数学模型     

魏季和 《上海大学学报(英文版)》2002,6(1):1-23

The available studies in the literature on physical and mathematical modeling of the argon-oxygen decarburization(AOD) process of stainless ssteel have briefly been reviewed.The latest advances made by the author with his research group have been summarized.Water modeling was used to investigate the fluid flow and mixing characteristics in the bath of an 18t AOD vessel,as well as the “back-attack” action of gas jfets and its effects on the erosion and wear of the refractory lining,with sufficiently full kinematic similarity.The non-rotating and rotating gas jets blown through two annular tuyeres,respectively of straight-tube and spiral-flat tube type.Were employed in the experiments.The geometric similarity ratio between the model and its prototype(including the straighttube type tuyeres)was 1:3 ,The influences of the gas flow rate,the angle included between the two tuyeres and other operating parameters,and the suitability of the spiral tuyere as a practical application,were examined.These latest studies have clearly and successfully brought to light the fluid flow and mixing characteristics in the bath and the overall features of the back-attack phenomena of gas jfets during the blowing.nd have offered a better understanding of the refining process.Besides,mathematical modeling for the refining process of stainless steel was carried out and a new mathematical model of the process was proposed and developed.The model performs the rate calculations of the refining and the mass and heat balances of the system.Also,the effects of the operating factors,including adding the salg materials.crop ends,and scrap,and alloy agents;the non-isothermal conditions;the changes in the amounts of metal and slag materials,crop ends,and scrap,and alloy agents;the non-isothermal conditions;the changes in the amounts of metal and slag during the refining;and other factors were all considered.The model was used to deal with and analyze the austenitic stainless steel making (including ultra-low carbon steel) and was tested on data of 32 heats obtained in producing 304 grade steel in an 18t AOD vessel.The changes in the bath compostion and temperature during the refining process with time can be accurately predicted using this model.The model can provide some very useful information and a reliable basis for optimizing the process practice of the refining of stainless steel and control of the process in real-time and online.  相似文献   

ρ-混合序列的停时和与超出的完全收敛性     

唐干武 《桂林师范高等专科学校学报》2004,18(2):105-108

本文讨论了同分布ρ-混合序列的停时和与超出的完全收敛性。  相似文献   

An Approach to the Estimation of the Packing Efficiency by Considering Gas and Liquid Axial Mixings     

唐忠利  刘春江  袁希钢  余国琮 《天津大学学报(英文版)》2004,10(3)

Axialmixing ,or“longitudinaldispersion”and“backmixing”interminology,isanimportantnon idealflowphenomenoncommonlyoccurringinchemicalengi neeringprocess,suchasdistillation ,absorption,extrac tion,etc.Thisphenomenonrepresentsadeviationfrompistonflowandusuallyformsaparabolicaxialconcentra tionprofilealongtheflowdirection.Theunfavorableef fectofaxialmixingisthatitdecreasesthemasstransferdrivingforcesandfinallyleadstopoorerseparationeffi ciency.Instructuredpackedtower,althoughtheaxialmixingcanbe…  相似文献   

论网络时代我国传媒业的发展     

刘景慧 《零陵学院学报》2003,24(5):165-167

互联网络的兴起和迅速扩张，使得网络媒体以其特有的优势影响着传统媒体的发展，中国成为世贸组织的正式成员，又让传媒业面临着国外大型媒体的激烈竞争，我国传媒业必须多媒体融合、多元化经营、多功能发展，才能在国际传播和信息新秩序中赢得一席之地。  相似文献