语音情感转换技术综述

随着情感信息处理的研究不断深入,语音信号中的情感转换越来越受到人们的重视。与传统的信息处理技术不同,语音的情感转换是用机器来实现理解和认识。本文首先探讨了情感的分类;接着,将语音情感转换系统分为：特征提取、参数转换和语音合成,并从特征提取和参数转换两方面进行了阐述,分析了相关的理论及算法,对各方法的优缺点进行了比较。最后,对语音情感转换研究方向进行了讨论。     

基于碲基光纤SRS效应的全光波长转换研究

通过对碲基光纤拉曼增益谱曲线进行线性拟合,利用光纤中N信道前向瞬态受激拉曼散射效应(SRS:Stimulated Raman Scattering)的非色散限制的分析理论对碲基光纤拉曼波长转换进行了数值模拟,并对影响拉曼波长转换的因素进行了分析,同时与普通硅基光纤拉曼波长转换进行了比较。结果表明:在采用同样功率泵浦信号光的情况下,较普通硅光纤波长转换而言,利用碲基光纤进行拉曼波长转换采用的光纤长度较短,且得到的峰值转换效率高。     

用于水下拖体的数字光端机的设计

设计了一种应用于水下拖体与母船之间通信的数字光端机,包括3路模拟通道和1路数字通道。光端机发送端对模拟信号进行A/D转换,对数字信号进行TTL电平转换,然后通过调制、编码及PECL电平转换由光发射模块发送到光纤上进行传输。接收端的光接收模块将光纤传输的光信号转换为电信号,进行PECL电平转换、解码、解调及D/A转换后对信号进行还原。     

抚顺广电宽带网的地址转换

本文对地址转换的原理、过程及优缺点进行了详细描述,对地址转换在抚顺广电宽带网的实际应用进行了详细的描述,并对NE40路由器的地址转换的实际应用进行了详细介绍.     

基于傅立叶-贝塞尔展开的语音转换算法

文中介绍了基于FB展开的语音信号表示的基本理论,并对用FB展开系数表示语音的能力进行了分析。提出了基于FB展开的语音转换算法,并对该算法进行了仿真实验。对转换后语音所进行的ABX测试表明,该算法能够较好的完成语音转换,转换后语音的自然度和目标人趋向度比较高。     

基于SOA的XPM全光波长转换器转换信号消光比特性分析

对XPM波长转换器的转换信号及消光比特性进行了详细分析。讨论了偏置电流对转换波形的影响，以及偏置电流和转换速率对转换后信号消光比的影响。     

语音转换及相关技术综述

给出了语音转换的定义,介绍了语音转换的用途,分析了表征说话人个性特征的语音参数,研究了语音转换的系统结构,对语音转换的实现主要从频谱包络和韵律两个方面的转换进行了研究讨论,分析并介绍了语音转换现在的发展水平及存在的问题。     

浅谈数字音频采样率转换的插值算法

数字音频采样率转换的核心是插值算法,其决定了转换后音质损失的多少。本文介绍了音频A/D转换及采样率标准的基础知识,汇总了一些音频采样率转换的插值算法,并通过编写测试程序对音频数据进行采样率转换,将不同算法的计算耗时及插值结果进行比较后,总结各算法的优缺点及其适用场景。     

语声转换技术发展及展望

语声转换通过改变语音信号的声学特征参数来调整语音的个性特征，从而使得转换后的源说话人语音听起来就像是目标说话人的声音一样。系统地介绍了当前语声转换技术的发展状况，在描述语声转换技术的应用场景和系统框架的基础上，着重阐述了系统的转换模块，即声道特性的转换和韵律转换，特别是重点介绍了声道特性的转换算法。简要地介绍了系统性能的测试方法，最后对全文进行了总结，并针对当前语声转换技术还存在的一些问题，对未来的发展进行了展望。     

基于光纤中四波混频效应波长转换的实验研究

为了实现波长转换,利用环形腔掺铒光纤激光器作为大功率泵浦光源,对基于光纤中四波混频效应的波长转换进行了实验研究,成功实现了在泵浦光的两侧产生波长转换信号,波长转换范围约6.5nm左右.同时对实验中出现的一些特殊现象进行了分析.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.