检索结果-南通市图书馆

Duration and its application in continuous speech recognition

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Journal of Acoustics 2000年第3期19卷 259-269页

作者： ZHAO Qingwei XIAO Xi WANG Zuoying LU Dajin (department of electronic engineering, Tsinghua {3. {4. 100084.

DDBHMM (Duration Distribution Based Hidden Markov Model) solved the defects of traditional HMM (Hidden Markov Model). Based on DDBHMM, the problem of how to effectively utilize the duration information is studied in detail. The approach on estimating the duration distribution is introduced first, then the data file is classified according to the speak rate. The recognition experiment shows that, the duration information behaves best on the data of low speak rate, behaves normal on the data of medium speak rate and has little effect on the data of fast speak rate. Therefore, the most importance of duration is that by it the more accurate state segmentation point could be obtained and then the recognition rate can be improved. At the same time, the robustness of the system to speaking rate is improved with the employment of the duration information. Furthermore, the method of classified duration and normalized duration is also put forward and studied in detail, it shows that both of the two method can improve the performance. In order to study the dependency between the duration, the method of using the Bigram of the duration is proposed and analyzed. At last, the approach of post processing duration is studied, it shows that only based on DDBHMM, and utilizing the duration information synchronously in the recognition process, then the performance can be improved greatly.

关键词： IEEE

维普期刊数据库

Formal Validation of Software Requirement

在线全文

学校读者我要写书评

暂无评论

Formal Validation of Software Requirement

第二届国际测量仪器与测试自动化学术会议

作者： Li Zhen Liu Bin Yin Yongfeng (department of System engineering of engineering Technology Beihang {3. {4. 100083.China)

＜正＞It is vital to guarantee software quality and reduce development cost by acquiring proper software requirement.A formal description of software requirement and a logical testing can find the fault of requirement and design and improve their *** Prolog,a logical programming design language,is suitable to solve the AI problem with the functions of pattern match,recursion,backtracking,object mechanism, fact and predicate database *** paper describes the software requirement formally and gives an example by applying them in a domain.

关键词： software engineering software testing software requirement Prolog

Low Bit and Variable Rate Speech Coding Using Local Cosine Transform

在线全文

cnki会议

学校读者我要写书评

暂无评论

Low Bit and Variable Rate Speech Coding Using Local Cosine T...

2002年IEEE十区计算机、通信、控制和电机工程会议

作者： Dong Enqing Zhao Heming Li Yongli department of Communication & electronic engineering, Soochow {3., Su Zhou 215021,China School of electronic and information engineering, Xi'an Jiaotong {3. Xi'an 71004.,China

An average 1.6kb/s low bit and variable rate speechcoder based on local cosine transform (LCT) algorithm for atwo-way conversational speech is designed for the first timein the paper. The result of the voice activity detector (VAD)based on support vector machine (SVM) and theclassification method of the voicing modes of the GSM halfrate standard for active speech are adopted in the design ofthe variable bit rate coder. The moderately voiced mode andthe strongly voiced mode of the voicing modes are combinedas a voicing mode, the new combined voicing mode isnamed as a moderately and strongly voiced mode. A fewsegment vector quantizers of the LCT coefficients for eachvoicing mode and silence voicing frame (background noise)are employed, and LGB algorithm is applied to design thecodebooks. A tree fast search technique is used to select thevector of the LCT coefficients for each segment. Theevaluation using subject informal listening tests and a fewobject parameters indicates that the speech quality(intelligibility and naturalness) of the designed speech coderis better than that of the FS1015 standard coder. The newcoder has higher robust than the FS1015 standard coder,which is suitable for speech coding in any environments.

关键词： Low Bit and Variable Rate Speech Coding Using Local Cosine Transform

在线全文

cnki会议

学校读者我要写书评

暂无评论

高校人事管理信息系统的设计与实现

实验技术与管理 2011年第4期 244-245页

作者：徐燕军刘倩汪健陈怀楚清华大学人事处北京农业职业学院机电工程学院清华大学计算机与信息管理中心

以清华大学为例,介绍了高校人事管理系统的建设目标、功能模型、设计和实施。高校人事管理系统是数字化校园的基础系统,人事数据也是学校信息化建设的基础数据。高校人事管理系统的建设以人员招聘、入校、在校、离退离校的业务过程为主... 详细信息

以清华大学为例,介绍了高校人事管理系统的建设目标、功能模型、设计和实施。高校人事管理系统是数字化校园的基础系统,人事数据也是学校信息化建设的基础数据。高校人事管理系统的建设以人员招聘、入校、在校、离退离校的业务过程为主线,实现对全校教职工的综合管理与服务,提高高校人事管理水平,并通过跨部门的业务集成和数据共享,为学校人才引进、师资发展、评价考核的管理决策提供信息化支持。

关键词：人事管理高校信息系统

2.4.b/s Low Bit Rate Speech Coding Based on Local Cosine Transform

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

2.4kb/s Low Bit Rate Speech Coding Based on Local Cosine Tra...

2002年第6届信号处理国际会议

作者： Dong Enqing (enqdong@***) Liu Guizhong (Liugz@***) Li Hongliang(hlli@***)(department of Communication & electronic engineering Soochow {3. Su Zhou 215021 China) (School of electronic and information engineering Xi’an Jiaotong {3. Xi’an 71004. China)

＜正＞ A 2.4.b/s low-bit rate speech coder based on local cosine transform （LCT） algorithm is designed for the first time in the paper. Four segment vector quantizers of the local cosine transform coefficients are employed, and LGB algorithm is applied to design the codebooks. A tree fast search technique is used to select the vector of the local cosine transform coefficients for each splitted vector. The evaluation using subject informal listening tests and a few object parameters indicates that the reconstructed speech quality of the designed low bit rate speech coder is better than that of the FS1015 coder in intelligibility and naturalness. The new coder has higher robust than the FS1015 coder, which is suitable for speech coding in any environments.

关键词：

Program Design Based on Parametric of 3. Tunnel for Mine Ventilation Network

在线全文

cnki会议

学校读者我要写书评

暂无评论

Program Design Based on Parametric of 3D Tunnel for Mine Ven...

2011 International Conference on Business management and electronic information(BMEI 2011)

作者： XiaoDong Wang department of Civil and Environmental engineering university of Science & Technology {3. {3. 100083.P.R.China NaiLian Hu department of Civil and Environmental engineering university of Science & Technology {3. {3. 100083.P.R.China

In view of the complicated solution of the mine ventilation system, a table needs to be prepared, which includes the branch numbers and node numbers, before calculation of the mine ventilation network. However, it is tedious and tricky to compile and input this data sheet without program design. To address this problem, there was a program design developed by using Visual C++ and the secondary development tool-3.Mine software whose interface was the same as the platform. According to based data format of mine ventilation network solution software, through the program, the number of branches and nodes was decided in the three-dimensional network diagram of mine tunnels that has been built, and show in Excel. Instead of the manual compiling previous, this program realizes automatic extract process of basic data. Thus, it provides effective data information for the mine ventilation network solution.

关键词： secondary development branch number node number data extraction

在线全文

cnki会议

学校读者我要写书评

暂无评论

电子信息课程体系建设的思考与实践

实验技术与管理 2009年第6期 193-195页

作者：殷卫真严峰北京工业大学实验学院信息工程系

介绍了北京工业大学实验学院电子信息专业实验教学体系建设与教学改革的思考与实践。提出任务导向模式的规划构想,介绍了在保持体系先进性开放性上、在提高学生的工程素质上、在质量理念的贯彻上、在培养复合型人才等方面的一些思考与... 详细信息

介绍了北京工业大学实验学院电子信息专业实验教学体系建设与教学改革的思考与实践。提出任务导向模式的规划构想,介绍了在保持体系先进性开放性上、在提高学生的工程素质上、在质量理念的贯彻上、在培养复合型人才等方面的一些思考与实践。

关键词：任务导向实验教学体系教学改革

Analysis of Energy Saving Potential using Shadings and Natural Ventilation in Four Major Cities in China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Analysis of Energy Saving Potential using Shadings and Natur...

第三十届中国控制会议

作者： XU Xiaoyan~1,JIA Qingshan~2,CHEN Xi~2,GUAN Xiaohong~(1,2),JIANG Ziyan~3.1.School of electronic & information engineering,Xi''an Jiaotong {3.,Xi''an,71004.,Shaanxi Province,P.R.China 2.CFINS,{4. of Automation,Tsinghua {3.,beijing,100084.P.R.China 3.{4. of Building Sciences,Tsinghua {3.,beijing,100084.P.R China

＜正＞There are generally two ways for building energy saving,namely to improve the efficiency of various devices such as HVACs and lighting systems,and to reduce the building loads by using shadings and natural *** most existing studies focus on the first way,the second way does not increase any hardware investments and can be easily implemented in existing buildings,and thus is the focus of this *** order to understand the energy saving potentials, we compare optimal joint controls of shadings and natural ventilation in four cities in China in typical days in summer. Numerical results show that the optimal controls of shadings in different cities do not change much and provide constant energy saving,while the optimal controls of natural ventilation differ greatly but contribute more in energy saving.

关键词： Building energy saving Integrated control Shading natural ventilation

TH FACE2000人脸识别系统的设计与实现

在线全文

cnki会议

学校读者我要写书评

暂无评论

计算机工程与应用 2002年第14期38卷 233-234,241页

作者：杜成清华大学电子系图像图形研究所北京100084

文章着重介绍了THFACE2000人脸自动识别系统的设计思想和实现技术。该系统以人像识别技术为核心,用客户机/服务器模式,建立和维护了一个含有人像特征的综合数据库,从而能够在输入一张未知人像照片时,迅速地询出最接近于待查照片的若干... 详细信息

文章着重介绍了THFACE2000人脸自动识别系统的设计思想和实现技术。该系统以人像识别技术为核心,用客户机/服务器模式,建立和维护了一个含有人像特征的综合数据库,从而能够在输入一张未知人像照片时,迅速地询出最接近于待查照片的若干已登记人员的身份信息。该系统应用到了人像识别,机群,数据库等多种技术。该系统在安刑侦,海关,机场,车站等领域有着广泛的应用前景。

关键词： TH FACE2000 人脸识别系统设计人像查询并行计算 ActiveX控件计算机

维普期刊数据库