基于正交小波变换和谱减法的语音增强研究

随着语音处理技术研究的深入和实际应用的增多,各种语音处理系统面临着进一步提高性能的问题。语音增强技术广泛地用来提高语音处理系统前端预处理的抗噪声能力和输入信号的信噪比,改善语音质量、可懂度和系统的性能,而作为预处理或前端处理模块存在于语音处理系统中。因此,对语音增强技术的研究具有十分重要的意义。本文基于正交小波变换理论和谱减法对语音增强问题进行了研究。     

一类数据查询结果的自动语音处理

基于电话网络的数据查询语音系统的一般实现及应用,提出了基于语音MODEM的低成本实现方案,给出了程序实现流程图,并重点解决了语音处理的连续性问题。在语音信息服务领域具有较好的应用价值。     

DSP技术在IP电话系统中的应用

介绍了IP电话及其DSP技术相关问题，并针对于IP电话QOS不能得到保证的问题，提出了可以利用针对于IP电话的DSP语音处理系统来解决关键技术的方案，同时介绍了基于TMS320C6211B的实时压缩语音处理系统方案。     

一种教学用蓝牙语音传输装置的设计

本论文首先分析了传统教室扩音系统的不足以及蓝牙技术应用于模拟扩音系统的优势，在此基础上提出了基于蓝牙技术的模拟扩音系统应用方案。然后对基于蓝牙技术的模拟扩音系统终端进行了软硬件设计。并对蓝牙语音传输系统的有效通信距离和稳定性等参数进行了实际测试和结果分析。测试结果表明，蓝牙语音传输系统的有效通信距离和稳定性满足课堂教学的需要。     

过抽样混沌序列的语音通信加密应用

通过对混沌系统特性的研究,设计出一种安全性高、加密速度快的通信加密方案.首先根据数字混沌序列的特性对混沌的迭代过程进行改进,实现对Chebyshev混沌序列的过抽样处理.设计语音信号传输系统,在发送端实现混沌序列对语音信号的加密,调制后进入高斯白噪声信道,在接收端接收到密文后对加密语音信号进行解调和解密,得到解密后的语音信号.实验证明,过抽样技术应用在混沌扩频通信中,可以极大地提高无线通信的保密性.     

基于非特定人车载电器语音控制系统的研究与实现

文章以整车非安全性车身电器为控制对象,给出了一种基于HMM算法的非特定人语音集成控制方案,详述了系统的硬件、软件设计方法,并实现了系统样机的研制。其中,系统语音识别单元是以Soc语音处理芯片SDA80D51为核心,并应用飞思卡尔高性能MCU——MC9S12XEP100作为执行单元主控芯片,实现了对非安全性车灯、自动空调、汽车雨刮、电动车窗和汽车音响的语音识别与集成控制。该系统在样机上进行了车载电器语音控制测试,测试结果表明系统在相对安静环境下的平均识别率可达94%。     

语音回声隐藏技术及分析

将信息隐藏技术用于实现语音安全通信,对语音安全通信的一种新方法———语音回声隐藏技术进行了分析和研究,给出了实现该技术的系统方案,并进行仿真和分析,从人耳听觉特性具体要求的角度具体讨论了该系统的实现细节。     

新型16位单片机在嵌入式语音系统中的应用

介绍了一种新型的16位单片机(SPCE061A)在嵌入式语音系统中的应用。首先简单介绍SPCE061A的性能和优点,然后对传统方式下嵌入系统语音功能的实现方法与采用SPCE061A在嵌入系统中语音功能的实现方法进行对比。SPCE061A具有多种语音处理功能,使嵌入系统中的语音应用开发变得方便、快捷。     

基于基音同步叠加的汉语文语转换

提出了一种将基音同步叠加技术用于汉语文语转换系统的方法。主要介绍了系统的基本组成、语音基元选择、语音库的结构和检索、文本的预处理、合成规则、基音同步叠加技术等。该系统在语言学处理中采用了分词精度较高的基于词形统计的汉语文本切分算法 ;韵律处理采用了能有效控制合成语音韵律的语音合成规则 ;声学处理采用了基音同步叠加技术进行语音合成 ,易于调整合成语音的音高、音长和音强。测试表明 ,本系统语音输出清晰度达 95 % ,自然度达 8.1分 (按 10分制 ) ,基本达到实用的要求     

语音音质客观评价系统的实现

语音质量评价始终是语音处理系统研发中极为关心和重视的问题。要对日益庞杂的语音系统进行测评,研制灵活、方便、快捷、可靠的语音质量评价系统极其必要。通过介绍语音音质客观评价方法的基本原理,分析ITU—T最新建议标准P．862中的PESQ算法,最终提出了基于PESQ算法的语音音质客观评价系统的软硬件实现方案,并重点介绍了系统各部分的设计思想、实现难点以及解决策略。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that