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2009 International Multimedia, Signal Processing and Communication Technologies最新文献

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Programmable multi channel monitoring and control Linux based data acquisition system 基于Linux的可编程多通道监控数据采集系统
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164173
Rita Nagar, S. Sadistap, K. Rao
Linux with programming tools Qt is becoming popular to develop applications in the field of agricultural, medical and sports practice. This paper describes the low cost implementation of multi channel Automated I/O controller using Industrial PC and high performance data acquisition (DAS) card. The developed system aimed to monitor and control the different process parameters by using Qt tool under Linux along with 12-bit data acquisition system (PCL818-HG). The system monitors different parameters from different types of sensors and the control algorithms generate an ON/OFF command to t h e actuators through a SOLENOID VALVE UNIT according to the set points. There are also provisions to display measured parameters as a trend graphs and history graphs form the stored data in files. Further system communicates to host computer or other embedded system through RS232 or Wireless IEEE1451.3 network. The developed embedded system, being an open platform not only reduces the software cost but also reduces the development time.
Linux与编程工具Qt在农业、医疗和体育实践领域开发应用程序正变得越来越流行。本文介绍了利用工业PC机和高性能数据采集卡实现多通道自动I/O控制器的低成本实现方法。该系统采用Linux操作系统下的Qt工具,配合12位数据采集系统(PCL818-HG)对不同的工艺参数进行监测和控制。系统监控来自不同类型传感器的不同参数,控制算法根据设定值通过电磁阀单元生成ON/OFF命令来启动执行器。还规定将测量参数显示为趋势图和历史图,形成存储在文件中的数据。系统通过RS232或无线IEEE1451.3网络与上位机或其他嵌入式系统通信。所开发的嵌入式系统作为一个开放的平台,不仅降低了软件成本,而且缩短了开发时间。
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引用次数: 1
Low component voltage mode Universal Biquadratic Filter using low voltage DOCCII 低分量电压模式通用双二次滤波器采用低压DOCCII
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164178
T. Parveen, M. Ahmed, I. A. Khan
The paper presents a new Multi Inputs and Single Output (MISO) VM Universal Biquadratic Filter (UBF) employing only two low voltage dual output current conveyors (DOCCIIs) along with two resistors and two capacitors. The proposed circuit realizes six standard biquadratic responses, viz., low pass high pass, non inverting band pass, inverting band pass, band elimination and all pass. The filter enjoys attractive features, such as, low active and passive component count, low sensitivity performance, operation of low supply voltage (± 0.75V) and power consumption of 3.2mW. The filter was designed and verified using PSPICE with convincing results.
本文提出了一种新的多输入单输出(MISO)虚拟机通用双二次滤波器(UBF),该滤波器仅采用两个低压双输出电流传送带(doccii)以及两个电阻和两个电容器。该电路实现了低通、高通、非反相带通、反相带通、带消除和全通六种标准双二次响应。该滤波器具有低有源和无源元件数、低灵敏度、低电源电压(±0.75V)、功耗3.2mW等特点。利用PSPICE对该滤波器进行了设计和验证,得到了令人信服的结果。
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引用次数: 1
SPICE model for optoelectronic xor gate based on Light Amplifying Optical Switch (LAOS) 基于光放大光开关(LAOS)的光电xor门SPICE模型
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164232
H. Alhokail
In this paper an optoelectronic XOR gate based on Light Amplifying Optical Switch (LAOS) was modeled by SPICE. The equivalent circuit used to implement this gate consists of only one LAOS and four HPTs. The input and output of the circuit are all optical. The model was used to demonstrate the functionality of such gate. This model can be used to improve and study the physical factors that affect such gate.
本文利用SPICE软件对基于光放大光开关的光电异或门进行了建模。用于实现该门的等效电路仅由一个老挝和四个hpt组成。电路的输入和输出都是光的。该模型被用来演示这种门的功能。该模型可用于改进和研究影响该闸门的物理因素。
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引用次数: 0
OFC based versatile circuit for realization of impedance converter, grounded inductance, FDNR and component multipliers 基于OFC的通用电路,实现阻抗变换器、接地电感、FDNR和分量乘法器
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164179
T. Parveen, M. Ahmed
This paper presents a new versatile active circuit for the realization of impedance converter, ideal grounded inductance, FDNR, and R/C multipliers through appropriate selection of passive elements. The proposed circuit is realized using low voltage CMOS Operational Floating Conveyors (OFC) and grounded passive components, without using any matching constraints. This makes it attractive for IC implementation. As an application the proposed grounded inductance simulator is used to realize a multifunctional filter, which provides low pass (LP), band pass (BP) and high pass (HP) responses. The circuit also enjoys attractive features, such as, low supply voltage, low component count, low sensitivities, high Q and independent Q-tuning without affecting its pole frequency. Simulation results show excellent performance with low voltage of ± 0.75 volts.
本文提出了一种新的通用有源电路,通过适当选择无源元件来实现阻抗变换器、理想接地电感、FDNR和R/C乘法器。该电路采用低压CMOS操作浮动输送机(OFC)和接地无源元件实现,不使用任何匹配约束。这使得它对集成电路实现具有吸引力。作为一种应用,所提出的接地电感模拟器用于实现一个多功能滤波器,该滤波器提供低通(LP)、带通(BP)和高通(HP)响应。该电路还具有低电源电压、低元件数、低灵敏度、高Q和独立调Q而不影响其极频等吸引人的特点。仿真结果表明,在±0.75伏的低电压下,系统具有良好的性能。
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引用次数: 3
Smoothing cephalographs using modified anisotropic diffusion filter 使用改进的各向异性扩散滤波器平滑脑电图
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164192
A. Kaur
For the automatic detection of cephalometric landmarks in digital skull X-ray, enhancement is required for selective emphasis and suppression of information in the image with the aim of increasing the image's usefulness, image smoothing filters are used for noise removal and blurring for removing small details which clutter the main shape. This image smoothing leads to better edge detction for recognizing the landmarks on the edges. This paper proposes a new smoothing technique based on anisotropic diffusion which gives improved results.
为了自动检测数字颅骨x射线中的头颅标志,需要增强以选择性地强调和抑制图像中的信息,以增加图像的有用性,图像平滑滤波器用于去除噪声,模糊用于去除干扰主要形状的小细节。这种图像平滑导致更好的边缘检测,以识别边缘上的地标。本文提出了一种新的基于各向异性扩散的平滑技术,得到了较好的平滑效果。
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引用次数: 0
Development of CMOS based gas sensors 基于CMOS的气体传感器的开发
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164196
R. Kumar, S. A. Imam, M. R. Khan
In this paper we review the development of CMOS compatible sensors for detection of injurious chemical compounds present in gas. Among the most serious limitations facing the success of future consumer gas identification systems are the drift problem and the real-time detection due to the slow response of most of today's gas sensors. We reviewed gas identification approach based on a microelectronic gas sensors technology and GMM. And found that performance is achieved using GMM with a success rate of 94% obtained for different principal components which is much better response with respect to other well known traditional as well as advanced pattern recognition algorithms such as KNN, MLP, SVM, and PPCA. This points out to an important result, which suggests that higher generalization performance can be obtained by using feature reduction and selection techniques as preprocessing techniques. Using the operating temperature as a parameter to tune the selectivity of the sensor chip to different target gases was also proven to be an effective way to improve performance of the overall system. This approach is able to overcome drift problem.
本文综述了用于检测气体中有害化合物的CMOS兼容传感器的研究进展。未来消费者气体识别系统成功面临的最严重限制之一是漂移问题和实时检测,这是由于当今大多数气体传感器的响应缓慢造成的。本文综述了基于微电子气体传感器技术和GMM的气体识别方法。并发现使用GMM可以实现性能,对于不同的主成分获得了94%的成功率,这比其他众所周知的传统和先进的模式识别算法(如KNN, MLP, SVM和PPCA)的响应要好得多。这指出了一个重要的结果,表明使用特征约简和选择技术作为预处理技术可以获得更高的泛化性能。利用工作温度作为参数来调整传感器芯片对不同目标气体的选择性也被证明是提高整个系统性能的有效方法。这种方法能够克服漂移问题。
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引用次数: 0
Recent advances in transport level error control techniques for wireless video transmission 无线视频传输中传输级误差控制技术的最新进展
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164180
Yoong Choon Chang, S. Lee, R. Komiya
Transmission of compressed video over wireless channels remains a challenging task due to the noisy nature of the wireless channels and a single bit error in the compressed video bit-stream might cause the reconstructed video to be severely distorted. Numerous error control techniques have been proposed in the literature in order to minimize the video quality degradation caused by transmission errors in wireless channels. This paper provides a brief review of the recent advances in transport level error control techniques for wireless video transmission. In addition, the transport level error control techniques implemented in the latest mobile TV and digital TV standards will also be briefly discussed.
在无线信道上传输压缩视频仍然是一项具有挑战性的任务,因为无线信道的噪声特性和压缩视频比特流中的单个比特错误可能导致重构的视频严重失真。文献中提出了许多误差控制技术,以尽量减少无线信道中由传输误差引起的视频质量下降。本文简要介绍了无线视频传输的传输级误差控制技术的最新进展。此外,还将简要讨论最新移动电视和数字电视标准中实现的传输级错误控制技术。
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引用次数: 2
Modernization of soild density standards setup to make it a fully computer controlled unattended system 现代化的固体密度标准设置,使其成为一个完全由计算机控制的无人值守系统
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164236
Nisha, Nitu Dhyani, Vijay Sharma, S. Sinha, T. Saxena
A fully computer controlled system has been designed and developed for measuring the density of solids by hydrostatic weighing method. The hardware of the system has been developed around 89C51 microcontroller. In this setup density of the unknown sample is determined with the help of mean density of the two solid density standards. The overall uncertainty has been obtained to be of the order of 0.7ppm.
设计并研制了一套全计算机控制的流体静力称量法固体密度测量系统。系统硬件以89C51单片机为核心进行开发。在此设置中,利用两种固体密度标准的平均密度来确定未知样品的密度。总体不确定度约为0.7ppm。
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引用次数: 1
Separation performance of ICA algorithms in communication systems 通信系统中ICA算法的分离性能
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164195
S. Parmar, B. Unhelkar
In commercial cellular networks, like the systems based on direct sequence code division multiple access (DS-CDMA), many types of interferences can appear, starting from multi-user interference inside each sector in a cell to inter-operator interference. Also unintentional jamming can be present due to co-existing systems at the same band, whereas intentional jamming arises mainly in military applications. Independent Component Analysis (ICA) use as an advanced pre-processing tool for blind suppression of interfering signals in direct sequence spread spectrum communication systems utilizing antenna arrays. The role of ICA is to provide an interference-mitigated signal to the conventional detection. Several ICA algorithms exist for performing Blind Source Separation (BSS). ICA has been used to extract interference signals, but very less literature is available on the performance, i.e., how does it behave in communication environment. This needs an evaluation of its performance in communication environment. This paper evaluates the performance of some major ICA algorithms like Bell and Sejnowski's infomax algorithm, Cardoso's joint approximate diagonalization of eigen matrices (JADE) algorithm, Hyvarinen's fixed point algorithm, Pearson-ICA algorithm and Comon's algorithm in a communication blind source separation problem. Independent signals representing sub-Gaussian, Gaussian and mix users(sub-Gaussian, super-Gaussian and Gaussian) are generated and then mixed linearly to simulate communication signals. Separation performance of ICA algorithms measure by performance index.
在商用蜂窝网络中,如基于直接序列码分多址(DS-CDMA)的系统,会出现多种类型的干扰,从小区内每个扇区内的多用户干扰到运营商之间的干扰。此外,由于在同一频段共存的系统,无意干扰也可能存在,而故意干扰主要出现在军事应用中。独立分量分析(ICA)是利用天线阵列直接序列扩频通信系统中盲抑制干扰信号的一种先进的预处理工具。ICA的作用是为传统的检测提供一个抑制干扰的信号。目前已有几种用于盲源分离(BSS)的ICA算法。ICA已被用于提取干扰信号,但关于其性能的文献很少,即它在通信环境中的表现。这就需要对其在通信环境下的性能进行评估。本文评价了Bell and Sejnowski的informax算法、Cardoso的联合近似对角化特征矩阵(JADE)算法、Hyvarinen的不定点算法、Pearson-ICA算法和Comon算法等主要ICA算法在通信盲源分离问题中的性能。生成代表亚高斯、高斯和混合用户(亚高斯、超高斯和高斯)的独立信号,然后进行线性混合,模拟通信信号。用性能指标衡量ICA算法的分离性能。
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引用次数: 16
MUHIS : A Middleware approach Using LiveGraph 使用LiveGraph的中间件方法
Pub Date : 2009-03-14 DOI: 10.1109/MSPCT.2009.5164209
M. Sain, Hoonjae Lee, W. Chung
we build MUHIS (Middleware for Ubiquitous Healthcare Information System) architecture with LiveGraph, J2EE and Oracle to process different ubiquitous healthcare application's data and process that data into useful information, which can play a important role in decision making in ubiquitous Healthcare System. Application developers mostly rely on third party middleware, tools and libraries (i.e., web servers, distributed middleware such as CORBA, XML etc.) to respond the emerging trends of their target domain. With this middleware we tried to enhance the efficiency of application by decrease their memory uses, data processing and decision making on another web module which is independent of each application. In our middleware system, we also proposed an application by which we can find some important conclusion about different health status likewise ECG, Accelerometer. etc., which can be used in various data processing and determine the current health status. In this paper we also analyze some different low level and high level middleware technology which were used to build different kind middleware likewise CAMUS, MiLAN and try to find the best solution in the form of middleware for Ubiquitous Healthcare Information System. T build our Middleware we also analyze different application such as Matlab, Oscilloscope, and JFreeChart and try to extract most common feature, and then try to build a advance LiveGraph which consist most of the common feature of above and also have some advance feature which is most feasible to analyze the data and to take some decision itself.
利用LiveGraph、J2EE和Oracle构建了MUHIS (Middleware for Ubiquitous Healthcare Information System)体系结构,用于处理不同的泛在医疗应用程序的数据,并将这些数据转化为有用的信息,从而在泛在医疗系统的决策中发挥重要作用。应用程序开发人员主要依靠第三方中间件、工具和库(即web服务器、分布式中间件,如CORBA、XML等)来响应目标领域的新兴趋势。通过这个中间件,我们试图通过减少应用程序的内存使用、数据处理和决策在另一个独立于每个应用程序的web模块上进行来提高应用程序的效率。在我们的中间件系统中,我们还提出了一个应用程序,通过该应用程序可以找到不同健康状态的一些重要结论,例如心电,加速度计。等,可用于各种数据处理和确定当前健康状态。本文还分析了采用不同的底层和高层中间件技术来构建不同类型的中间件,如CAMUS、MiLAN等,试图找到泛在医疗信息系统中间件形式的最佳解决方案。为了构建我们的中间件,我们还分析了不同的应用程序,如Matlab, Oscilloscope和JFreeChart,并尝试提取最常见的特征,然后尝试构建一个先进的LiveGraph,它包含了上述大多数常见特征,并具有一些最可行的高级特征,以分析数据并自行做出一些决策。
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引用次数: 3
期刊
2009 International Multimedia, Signal Processing and Communication Technologies
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