基于VC++和OpenGL的OBJ人脸模型的读取与交互操作

基于Open GL和OBJ模型文件格式的研究,本文实现了在Open GL中OBJ人脸模型的读取与显示及相关交互操作。重点介绍了OBJ文件的文件格式及如何利用Open GL来构建模型、绘制模型,同时,利用Open GL的强大功能来实现三维显示和交互操作,并应用于人体三维建模、地形建模以及虚拟现实等领域。     

虚拟场景中的3D音频的分析与实现

本文从我国的虚拟场景中音频制作现状出发,分析了虚拟场景中的3D音频的产生因素及各种音效实现技术现状,最后介绍了Directx8.0技术并用DirectSound8实现3D声音播放的例子,通过使用Directx8.0其中的DirectSound8实现虚拟场景的3D音频效果,使声音听上去更为真实。     

水下作业观测系统布局可视化仿真软件的研究

利用基于Windows平台的全参数化特征造型软件SolidWorks绘制水下作业平台及水下实况观测设备、水下观测目标的三维立体模型,利用Deep Exploration专业图形格式转换软件将3D模型转换成Open GL库函数可读取的数据列表格式,在OpenGL图形开发环境中进行了3D模型材质颜色设计、水下观测设备视场设计和3D场景的光照、漫游、缩放、旋转等功能设计,并在基于VC++2010的MFC软件开发平台下构建软件程序框架,设计出一套水下作业观测记录系统布局人机交互的可视化仿真软件,软件实现了布局场景显示及视角变换、设备布局调整及视场覆盖效果显示、观测目标显示及位置调整、观测设备布局效果图及安装布局参数保存等功能。     

基于改进半边数据结构的计算机仿真3D建模平台研究

研究并实现了一个交互式的三维建模系统,该系统以边界表示法表达三维模型为理论基础,同时提出一种改进的半边数据结构来表达三维模型,通过欧拉算子生成各种形体。系统实现了模型切割、实体交并差的布尔运算,以及对实体的体积、表面积的计算。在场景渲染方面,利用Open GL或者Direct3D的库函数结合系统所采用改进的半边数据结构实现了3D模型的渲染。在仿真模块实现了三维实体的体素化算法,该算法采用正四面体和长方体相结合的八叉树三维空间分割法对实体进行空间分割,实现了对物体重心的计算,最后用该系统实现了一个螺纹铣削加工的仿真实例。     

基于VB的串口通信在虚拟现实系统中的应用

在WindowsXP的软件环境下,以3D引擎技术为基础,创建3D虚拟空间,利用影像处理系统获取现实场景中的影像并与虚拟场景合成,实现最佳的图像融合效果;利用VB中的MSComm控件实现工业控制计算机与动力系统、影像处理系统、灯光照明系统的串口通信,将现实世界中的速度信息通过采集处理程序传递给虚拟场景,控制场景的视角变化和位移变化,较好地保证了任意时间作用于虚拟空间的信号与现实中变送器发出的信号的同步性,最终达到对3D虚拟空间的综合控制。     

基于Web3D的虚拟设备构建及动态生成技术

针对构成生产线几大要素的虚拟设备,在Web 3D平台上的动态实时生成技术。首先建立虚拟设备库,对虚拟设备进行分类构建,根据拖放命令,将虚拟设备调入虚拟场景并实时生成,并能在保证加载速度的情况下对Virtools和Web Service中实现实时生成。     

引江济太工程三维模拟系统研究及实现

探讨了引江济太工程三维模拟系统的结构、功能和实现方法，讨论了三维场景构建和交互驱动的关键技术．提出了大规模场景实时生成的优化方法，给出了动态网格快速生成的解决办法，并利用Open GL三维引擎在PC机系统上开发了引江济太工程三维模拟系统。     

芯原利用Vivante图形解决方案扩展SoC平台

Vivante Corporation（Vivante）与Veri Silicon（芯原）共同宣布：Vivante授权芯原将前者可扩展的2D、3D图形技术方案引入到其庞大的系统级IP库中。这项协议的达成,让芯原可以采用Vivante已经得到硅验证的Open GL ES 2．0／1．1和OpenVG1．1的图形处理IP核,从而使得芯原能够更好的为移动及家庭娱乐应用提供基于虚拟交互技术的SoC设计服务。     

基于Web3D的虚拟场景演示系统框架的开发和研究

随着互联网与虚拟现实技术的发展,Web3D已成为互联网发展的必然趋势。基于Web3D技术的虚拟场景演示系统框架为场景演示提供了通用的开发模式。本文通过对虚拟场景演示框架实例的建立验证了本框架所具有的实用性以及科学性。     

基于OpenGL的3D天空模型

工程应用中使用OpenGL对三维场景进行渲染时,常需要对场景中的天空进行重构。为了达到到逼真的效果,要求3D天空模型能进行纹理渲染并具有动态效果。本文对目前常用的两种3D天空模型在Qt环境下利用OpenGL进行重构,对比了这两种天空模型的优缺点。     

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.     

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.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks