Advances in SVM-Based System Using GMM Super Vectors for Text-Independent Speaker Verification

For text-independent speaker verification, the Gaussian mixture model （GMM） using a universal background model strategy and the GMM using support vector machines are the two most commonly used methodologies. Recently, a new SVM-based speaker verification method using GMM super vectors has been proposed. This paper describes the construction of a new speaker verification system and investigates the use of nuisance attribute projection and test normalization to further enhance performance. Experiments were conducted on the core test of the 2006 NIST speaker recognition evaluation corpus. The experimental results indicate that an SVM-based speaker verification system using GMM super vectors can achieve appealing performance. With the use of nuisance attribute projection and test normalization, the system performance can be significantly improved, with improvements in the equal error rate from 7.78% to 4.92% and detection cost function from 0.0376 to 0.0251.     

螺纹钢筋（棒材类）的精确计数方法

本文提出了用数学形态学的腐蚀，膨胀操作边界循环扫描收缩和消除伪象素点等算法对螺纹钢筋进行计数，经实验验让使用本文所提出的算法可获得１００％的精确计数。     

聚丙烯酸-高岭土杂化高吸水材料的合成与性能

在高岭土存在下，以Ｎ－Ｎ－亚甲基双丙烯酰胺作交联剂，以过硫酸钾作引发剂，部分中和的丙烯酸单体进行聚合交联反应，合成高聚物／无机杂化高吸水性材料，采用正交设计法，研究中和度，单体用量，引发剂量，交联剂量，高岭土加入量及反应温度对吸水率的影响。     

FM-SCA无线寻呼射频的单片接收

首先介绍了FM－SCA无线寻呼的传统接收结构，重点提出超外差与零中频相结合以单片化实现FM－SCA射频接收的拓朴结构，并给出了数学推导，证明了该拓朴结构能有效地恢复出原始信号。     

Super resolution reconstruction of moving objects from low resolution surveillance video

Construction of high resolution images from low resolution sequences having rigid or semi-rigid objects with unified motions is often important in surveillance and other applications. In this paper a novel object-based super resolution reconstruction scheme was proposed, in which a six-parameter affine model-based object tracking and registration method was first used to segment and match objects among a sequence of low resolution frames. The motion model was then further extended to the traditional maximum a posterior (MAP) super resolution algorithm. The proposed object tracking and registration method was evaluated by both simulated and real acquired sequences. The results have demonstrated the high accuracy of the proposed object based method and the enhanced reconstruction performance of the extended approach.     

低碳Fe-W(Mo)-Co(Ni)合金研究

该文介绍了一种特殊类型高速钢——低碳Fe-W(Mo)-Co(Ni)合金的设计原理、冶炼、锻造、热处理工艺及它的基本性能,并与普通高速钢作了比较。实验结果指出,高钴含量时合金有极强的硬化能力,时效后硬度达68~69HRC,与超硬高速钢(M42)相同。该文还介绍了Fe-W(Mo)-Co(Ni)-Ti-A1合金刀具实验结果。     

对技工学校高技开设电子商务专业的思考

文章针对我国电子商务的快速发展,提出培养大量高素质、复合型的电子商务人才迫在眉睫。     

山西省星级酒店英语培训现状调查及研究

从对山西一家四星级酒店英语培训状况的问卷调查结果分析入手，指出目前酒店在英语培训过程存在的一些误区，提出了要想提高山西省星级酒店涉外服务水平应对，市场竞争能力必须重视的工作及要了解相关注意事项。     

基于80C51单片机的智能电动小车

采用80C51单片机为控制核心,利用超声波传感器检测道路上的障碍,控制电动小汽车的自动避障,快慢速行驶,以及自动停车,并可以自动记录时间、里程和速度,自动寻迹和寻光功能。整个系统的电路结构简单,可靠性能高。     

应用于IEEE 802.11 DCF中减小冲突的方法

为了提高IEEE 802.11 DCF(distributed coordination function)在网络繁忙时的性能,提出一种减小冲突的方法。该方法是将2个时隙组合起来构成一个超时隙。当一个站点在一个超时隙中发包时,它以q的概率选择第1个时隙发包,以(1-q)的概率选择第2时隙发包。因此,当多个站点同时在一个超时隙中发包时,一部分冲突就被转化为成功的发送或虚拟冲突。仿真结果表明:在存在100个站点的网络中应用该方法可以提高22.6%的吞吐量并将冲突所消耗的能量降低为原来的52.7%。这种方法简单易行,较大幅度提高了DCF的性能。