Self-clocking principle for congestion control in the Internet

The self-clocking principle (SCP) of Transmission Control Protocol (TCP) had been analyzed for a network implementing a per-flow buffering scheme. The ideal SCP is yet unknown for the Internet which implements a first-in–first-out buffering scheme. This paper derives an ideal SCP for the Internet by formulating the traffic transmission control as a typical control problem and then solving it by a control-theoretic approach. The ideal SCP reveals the defect of the SCP being deployed in the Internet that it is insufficient to avoid congestion by adjusting the packet effective window based on records of the outstanding packets of a single source; instead outstanding packets from other sources also have to be counted. The ideal SCP also reveals the difficulties of developing and implementing an effective self-clocking scheme for congestion control in the Internet.     

按图索骥——图形设计中的信息视觉化

信息图表设计是随着信息技术的发展而兴起的,对复杂的信息进行内容规划和视觉表达,从而使信息快速有效地传达。以信息的视觉设计为研究主体,从信息视觉化的特征、方法以及信息视觉化的现在与未来三个部分进行研究,强调了在当今大容量信息的社会背景下,信息的视觉化作为一种快速、有效、容易的表达方式,成为图表设计中一种必要的手段。     

鱼糜固态发酵工艺与其生化指标动态变化的研究

为了提高海产低值鱼糜食用价值,通过单因素和正交实验,研究利用绍兴腐乳毛霉进行海产低值鱼糜固态发酵的条件,及其发酵过程中生化指标的动态变化规律.结果表明,毛霉固态发酵鱼糜的最佳工艺:鱼糜初始水的质量分数65%,氯化钠质量分数1%,葡萄糖质量分数2%,玉米淀粉质量分数5%,大豆分离蛋白质量分数10%,蒸汽加热后接种,固态培养48h后酶活达60U/g以上,感官评价值为43.5.通过测定固态发酵过程中水的质量分数、pH、总酸、ANN、TVB-N、蛋白酶活力和质构变化,揭示固态发酵过程中的机理.     

用于高层结构减振的高位TLD设计

利用集中质量法,为某高层框架剪力墙结构设计了一套矩形TLD系统,以控制其第一、第二振型的水平地震反应.理论分析表明,该装置能使结构顶部的最大位移下降29.7%.     

教师专业发展评价：依据、型式与转向

教师专业发展是我国高质量教师队伍建设的必由之路。在教师专业发展评价的内容方面应注重其法律准则、价值取向和基础标准的分析;在评价型式方面,要明确评价的方法论和价值取向,应注重多种评价方式和类型的结合;教师专业发展评价应实现从连续性到非连续性生态化转向、教师个人事务到学校管理绩效的多样化转向以及“教龄＋职称”模式到发展性模式的转向。     

微细旦粘胶长丝仿真丝绸面料基本力学性能与风格研究

利用FAST仪器对4种微细旦粘胶长丝仿丝绸面料的基本力学性能与风格进行研究,发现其剪切刚度与总紧度比是真丝绸面料的1．52～2．80倍,面料悬垂性及尺寸稳定性明显优于真丝面料,而耐褶皱能力小于真丝面料且面料交织阻力较大,微细旦粘胶长丝仿真丝绸面料单位紧度透气量及透湿率明显小于真丝绸面料,可对同类产品研究提供借鉴．     

高等院校乒乓球基本功教学及其方法探讨

受到一些因素的影响,很多院校的乒乓球教学难以取得很好的效果,阻碍了这项运动的发展。高等院校体育教育中,乒乓球教学不仅可以增强学生体质,还可以培养学生全面掌握知识及灵活运用知识的能力,让学生具有一技之长,为学生自身择业开辟更广阔的空间,以适应现代经济的发展。     

基于模糊评价法的毕业设计成绩评定体系研究

毕业设计成绩评定是一个多因素综合评价问题,采用模糊评价法能避免评价过程中主观性因素对结果的影响,本文提出了毕业设计模糊评价体系,给出了综合评判义性失效时的解决办法,讨论了各项指标分别评定的优越性．     

Accurate mirror-based camera pose estimation with explicit geometric meanings

An accurate closed form solution is proposed to estimate camera pose by several mirrored reference object images acquired via a planar mirror under different unknown poses. Compared with state-of-the-art methods, our method is more accurate when there are more than three images and has explicit geometric meanings. This method also properly handles cases in which some of the mirror poses are parallel. The central idea is to minimize an error metric based on all reflections of rotation, which enables the camera rotation to be estimated directly by SVD of sum of mirrored camera rotations. After that, the camera translation is computed by solving a large system of linear equations to minimize object space collinearity error. Both synthesized data and real data experiments show the advantages of our approach.