使用MATLAB轻松享受GPU的强大功能

近年来,使用GPU（通用图形处理器）进行科学计算已变得十分普遍。GPU最初设计用于图像密集型视频游戏产业中的图形渲染绘制,但近年来GPU不断发展,现可用于更广泛的用途。研究人员可对其进行程序设计以执行计算,用于数据分析、数据可视化,以及金融和生物建模等应用。     

基于GPU运篡的车辆跟踪算法

随着并行计算技术的高速发展,GPU的架构不断完善,GPU强大的并行计算能力得以充分发挥,在图像处理领域优势更加明显。与以往的系统相比,基于GPU的系统不仅在性能上有着显著的提升,在开发成本和开发周期上也有一定的优势。SIFT描述算子,作为一个图像特征点的描述方法,具有图像旋转、尺度缩放、亮度变化的不变特性,对视角变化、仿射变换、噪声也保持一定程度的稳定性的特点,在医学图像,计算机动画,虚拟现实等领域都有着广泛的应用。SIFT算子涉及到大量的矩阵运算,与之前采用CPU计算的方式相比,GPU并行运算能提高几百甚至上千倍的速度。车辆特征的跟踪涉及到车辆特征的检测、描述与匹配,用GPU的并行运算,让车辆的跟踪真正得以实现。     

基于GPU运算的车辆跟踪算法

随着并行计算技术的高速发展,GPU的架构不断完善,GPU强大的并行计算能力得以充分发挥,在图像处理领域优势更加明显。与以往的系统相比,基于GPU的系统不仅在性能上有着显著的提升,在开发成本和开发周期上也有一定的优势。SIFT描述算子,作为一个图像特征点的描述方法,具有图像旋转、尺度缩放、亮度变化的不变特性,对视角变化、仿射变换、噪声也保持一定程度的稳定性的特点,在医学图像,计算机动画,虚拟现实等领域都有着广泛的应用。SIFT算子涉及到大量的矩阵运算,与之前采用的CPU计算的方式相比,GPU的并行运算能提高几百甚至上千倍的速度。车辆特征的跟踪涉及到车辆特征的检测、描述与匹配,用GPU的并行运算,让车辆的跟踪真正得以实现。     

在GPU上实现Jacobi迭代法的分析与设计

随着GPU技术的快速发展,GPU的浮点运算能力飞速提升。将GPU浮点处理能力用于非图形计算领域正成为高性能计算领域的热点研究问题。Jacobi迭代法是科学计算中常用的计算方法。在分析了GPU和Jacobi迭代法特征的基础上,基于Nvidia的CUDA平台设计并实现了Jacobi迭代算法,并通过实验表明,相对于CPU取得了较好的加速效果。     

图形处理器上的快速傅里叶变换

随着图形处理器(GPU)性能的突飞猛进,以及GPU可编程特性的发展,人们开始将GPU应用到通用计算领域(GPGPU)。目前国内在这方面的研究还相对较少。使用改进的按频率划分(DIF)算法,结合相关研究的新进展,在GPU上实现了快速傅里叶变换(FFT),讨论和分析GPU在GPGPU中的应用技巧和技术原理,比较GPU与CPU在GPGPU设计中的差异以及性能表现。对GPGPU设计具有指导作用。     

GPU在通用计算技术领域的研究

随着当前计算机性能的不断提高,应用范围非常的广泛,各种计算任务及计算的要求都在迅速的上升,这对处理器往通用及专用的两个方向迅速地发展有着非常重要的作用.以CPU为首的通用处理器是近几年的计算机的主要的构成部分,这样不但提高了集成度,性能及功能也得到了完善.处理器在特定领域应用的专用化程度也越来越高,分析GPU用于通用计算的发展优势,说明今后对于GPU的研究领域与建议.     

密码分析的时间-存储器综合法

本文提出了一种密码分析的概率方法,在需要N次运算的预计算之后,这方法以N~(2/3)次运算和N~(2/3)个存储字(平均值)对任何具有N个密钥的密码体制进行密码分析。如果预计算能够在一合理的时间周期(例如几年)内完成,那么这对于把恢复每个密钥需要的附加运算和穷举法(exhaustivesearch)需要的N次运算以及查表法(table lookup)需要的N个存储字进行比较是很有帮助的。当这种方法用来破译采用分组方式的数据加密标准(DES)时,它表明:每个解的费用将在1美元至100美元之间。这方法在选择明文攻击中有利,若未采用密码分组链(Cipher block chaining),这种方法也能够用于唯密文攻击(ciphertext-only attack)。     

基于GPU的AES算法实现

近几年图形处理器GPU的通用计算能力发展迅速,现在已经发展成为具有巨大并行运算能力的多核处理器,而CUDA架构的推出突破了传统GPU开发方式的束缚,把GPU巨大的通用计算能力解放了出来.本文利用GPU来加速AES算法,即利用GPU作为CPU的协处理器,将AES算法在GPU上实现,以提高计算的吞吐量.最后在GPU和CPU...     

基于GPU实现的调频遥测解调方法

调频信号具有优良的航天器飞行尾焰抗干扰能力,被广泛地应用于火箭和导弹遥测信号传输。传统硬件逻辑电路结构复杂、修改时间长,而软解调具有修改简单等特点,但是软解调运算时间长无法进行实时解调。随着集成电路的发展,原先仅用于加速图形计算的GPU逐步应用于数字信号处理。设计了利用GPU的软解调,可以完成实时解调的要求。     

利用CUDA加速连续波雷达测速算法

针对连续波雷达中事后分析系统的运算数据量大,运算时间长的特点,提出了一种利用CUDA平台的GPU进行加速运算的方法,它利用GPU的并行运算功能来完成FFT算法。实验结果表明,相比以往用CPU进行事后分析,利用CUDA平台进行事后分析的速度有明显提升。     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first