EBF网络特征映射和恢复及其在鲁棒话者识别中的应用     

李昕  郑宇  江芳泽 《上海大学学报(英文版)》2002,6(4)

The performance of speaker verification systems is often compromised under real-world environments. For example, variations in handset characteristics could cause severe performance degradation. This paper presents a novel method to overcome this problem by using a non-linear handset mapper. Under this method, a mapper is constructed by training an elliptical basis function network using distorted speech features as inputs and the corresponding clean features as the desired outputs. During feature recuperation, clean features are recovered by feeding the distorted features to the feature mapper. The recovered features are then presented to a speaker model as if they were derived from clean speech. Experimental evaluations based on 258 speakers of the TIMIT and NTIMIT corpuses suggest that the feature mappers improve the verification performance remarkably.  相似文献   

5-溴水杨醛甘氨酸修饰碳糊电极测定微量Cu2+的研究     

匡云飞  邹建陵  李薇  杨颖群 《衡阳师范学院学报》2006,27(6):44-46

在pH=9.0 H3BO3-Na2B4O7缓冲体系中,以5-溴水杨醛甘氨酸修饰碳糊电极为工作电极,Cu2 于 120mV(vs.SCE)处产生一灵敏的吸附波,其二阶导数峰电流与Cu2 浓度在4.0×10-9~8.0×10-7mol.dm-3范围内呈良好的线性关系,相关系数为0.9964,检出限为6.0×10-10mol.dm-3(3倍信噪比)。应用该法测定发样中Cu2 的含量,结果令人满意。  相似文献   

基于PLC的射砂制芯机控制系统     

黄淑琴 《连云港职业技术学院学报》2004,17(2):45-46

本文详细阐述了射砂制芯机的控制过程以及射砂制芯机控制程序的控制原理，论述可编程控制器(PLC)改造射砂制芯机的电器控制系统。  相似文献   

再论高等职业教育是一种类型     

陈英杰 《三门峡职业技术学院学报》2007,6(3):1-4

本文从世界高等教育发展史、我国高等职业教育发展史和我国学位制度的演变说明高等职业教育是一种类型,并对今后我国职业教育的发展从认识上、制度上、具体办学上相应提出了建议。  相似文献   

Pre-service and In-service Secondary School Teachers’ Knowledge about Attention-deficit Hyperactivity Disorder (ADHD) and Attitudes toward Students with ADHD     

Limeng Liang 《International Journal of Disability, Development & Education》2016,63(3):369-383

This article reports on a mixed-method inquiry into pre-service and in-service secondary school teachers’ knowledge about Attention-deficit Hyperactivity Disorder (ADHD) and attitudes toward students with this disorder in Hong Kong. The inquiry revealed no differences between pre-service and in-service secondary school teachers concerning their knowledge of ADHD and attitudes toward students with ADHD. It also identified possible sources of participants’ knowledge and a variety of factors underlying their attitudes toward students with ADHD including sociocultural beliefs and working conditions. The findings call for teacher educators to develop better education programmes to support both pre-service and in-service teachers in undertaking the challenging task of teaching students with ADHD.  相似文献   

Observations on the temporal correlates of reading failure     

Raymond M. Klein 《Reading and writing》2002,15(1-2):207-231

The definitions of developmental dyslexia andtemporal processing are discussed and severalconstruals of what a temporal processingdeficit might entail are illustrated. Then,using a framework developed by Farmer & Klein(1995), the proposal that a temporal processingdeficit (in vision, audition, or both) might bethe root cause of some proportion of cases ofdevelopmental dyslexia is introduced andvarious research strategies for testing thisproposal are identified. The symposium paperswhich address this general question using arange of these strategies are then criticallyreviewed. It is noted that whereas reading isa recent artifact not yet subject to any directselection pressure, its normal performancerequires the use of, and connections between,the highly evolved modules for visual patternrecognition and language. Within vision andlanguage redundant coding, which permitsperformance in the face of injuries anddegraded input, also makes it difficult todetect subtle deficits (whether temporal, ornot) unless precise tests are used. Yet suchdeficits may degrade performance on tasks (suchas reading) which require the non-copiousconnections between vision and language. Theefficacy of this pathway, I suggest, ismeasured by performance on the rapidautomatized naming (RAN) test.  相似文献   

热休克蛋白7O在乳腺癌和胃癌中的表达及其意义的研究     

程毅 魏贵亮周宁  吴迎爽谢震 祁贺薄爱华  张晓立邢立强 《河北北方学院学报(医学版)》2005,22(5):23-24

目的：探讨热休克蛋白70（HSP70）在人乳腺癌和胃癌中的表达及其意义。方法：应用免疫组织化学的方法对64例乳腺癌和55例胃癌组织中的HSP70进行检测。结果：（1）HSP70在乳腺癌和胃癌组织中的表达分别为78．13％．61.82％。（2）乳腺癌中HSP70的表达与乳腺癌的病理类型．淋巴结转移情况及年龄未发现显著差异（P〉0．05）。（3）胃癌中HSP70的表达与肿瘤浸润深度、淋巴结转移有密切关系（P〈0．05）。结论：HSP70在乳腺癌和胃癌中均呈较高水平表达．其中在胃癌中的表达与肿瘤浸润深度、恶性程度有密切关系,HSP70在乳腺癌和胃癌的发生发展中起重要作用。HSP70可能成为乳腺癌，胃癌的诊断指标之一。  相似文献   

抽象函数的一致强可导性问题     

董立华  刘莉  高秀莲 《德州学院学报》2003,19(6):4-5,38

文中指出从区域G包括于K(K是数域)到Banach空间内的抽象函数x(t)的强一致连续性、强(弱)可导性及一致强(弱)可导性、强囿变之间的关系，并且给出一致强可导的条件。  相似文献   

Starting and Sustaining an Undergraduate Research Program: The SURIEM Experience at Michigan State University     

Robert W. Bell 《PRIMUS》2017,27(3):406-417

Abstract

Mentoring undergraduate students in research is both rewarding and challenging. In this paper we present how we established a summer Research Experience for Undergraduates (REU) program in the mathematical sciences at Michigan State University. A goal of our REU is to include students who are at an early stage of their study of mathematics. We share our experiences in recruiting students, designing research projects, and mentoring our participants. We discuss the challenges we faced and the solutions we found while working with a diverse group of undergraduate students from across the nation.  相似文献   

用“轨道相图”分析有心力场轨道及其稳定性     

张子珍  孙彦  石果梅 《雁北师范学院学报》1997,(2)

利用由比尼公式得到的“轨道相图”分析有心力为轨道的稳定性,证明平方反比有心力作用下的轨道,不论其形式如何都是稳定的,并用线性稳定性方法证明在有心力F=K~2m/r~2的作用下,质点运动轨道稳定与不稳定分界点n的取值范围为2相似文献