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2014 International Conference on Control, Instrumentation, Communication and Computational Technologies (ICCICCT)最新文献

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Hybrid modulation based STATCOM with an external photovoltaic source 基于外部光伏源的STATCOM混合调制
V. Rahul, G. Devadhas
This paper presents a hybrid modulation based multilevel static synchronous compensator (STATCOM) voltage control method. A multilevel STATCOM is a combination of high voltage converter and low voltage converter with an energy source. STATCOM use either a battery or storage element as the energy bank. Most probably STATCOM consists of capacitors as reactive power supplying or reactive power absorbing element. During the operation of STATCOM, the capacitor voltage may vary from its value, there the importance of this work. A new control strategy is introduced in this paper in focus on the capacitor voltage. An experimental model is developed by using MATLAB SIMULINK block and the result shows that the STATCOM along with the new control technique perform satisfactorily.
提出了一种基于混合调制的多电平静态同步补偿器(STATCOM)电压控制方法。多电平STATCOM是一个带电源的高压变换器和低压变换器的组合。STATCOM使用电池或存储元件作为能源银行。STATCOM最可能由电容器作为无功电源或无功吸收元件组成。在STATCOM的工作过程中,电容器的电压值可能会发生变化,因此这项工作的重要性。本文重点介绍了一种新的电容电压控制策略。利用MATLAB SIMULINK模块建立了实验模型,实验结果表明,STATCOM与新控制技术的结合效果良好。
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引用次数: 0
Recent studies on microaneurysm detection: A review 微动脉瘤检测研究进展综述
K. Sreeja, S. Sushanth Kumar
Diabetic retinopathy is an open topic on which research has been ongoing for the past few decades. The damage caused by diabetic retinopathy can be prevented by the early detection of microaneurysm in the retina. This review focuses on microaneurysm detection, which is the commonly observed complication in diabetic patients. Some of algorithms used for microaneurysm detection from retinal fundus images are reviewed and summarized.
糖尿病视网膜病变是一个开放的话题,在过去的几十年里一直在进行研究。糖尿病视网膜病变引起的损害可以通过早期发现视网膜上的微动脉瘤来预防。本文综述了微动脉瘤的检测,这是糖尿病患者常见的并发症。综述了目前用于视网膜眼底图像微动脉瘤检测的几种算法。
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引用次数: 1
Three switch quasi Z-source series resonant inverter 三开关准z源串联谐振逆变器
J. Saravanan, P. Manikandan
This paper proposed new topology of quasi Z-source series resonant inverter by using three switches. The main advantages of new three switch quasi Z-source series resonant inverter is simple control strategies, widely varying input voltages, obtain a sine wave output voltage in high frequency. It consists of quasi Z-source boost converter with single switch and series resonant inverter. Moreover obtain a required frequency by setting series resonant inverter frequency. Theoretical analysis of three switch quasi Z-source series resonant inverter presented. The proposed inverter is a wide range of voltage gain. It is suitable for applications in photovoltaic (PV) systems, fuel cell. A simulation result is presented to verify the proposed inverter concept and theoretical analysis.
本文提出了一种采用三个开关的准z源串联谐振逆变器的新拓扑结构。新型三开关准z源串联谐振逆变器的主要优点是控制策略简单,输入电压变化幅度大,在高频处获得正弦波输出电压。它由单开关准z源升压变换器和串联谐振逆变器组成。另外,通过设定串联谐振逆变器的频率来获得所需的频率。对三开关准z源串联谐振逆变器进行了理论分析。所提出的逆变器具有宽范围的电压增益。适用于光伏(PV)系统、燃料电池等。仿真结果验证了所提出的逆变器概念和理论分析。
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引用次数: 0
High throughput arbitrary sample rate converter for software radios 用于软件无线电的高吞吐量任意采样率转换器
Nitin O. Mathur, B. Lakshmi
In modern digital communication systems, arbitrary sample rate conversion is the most computation intensive task. In addition, a reconfigurable sample rate converter is often required to meet the sampling rate requirements of different radio standards. This paper proposes a pipelined architecture for FPGA implementation of arbitrary rate converter employing cut-set retiming and Sum-Of-Power-Of-Two (SOPOT) techniques to achieve high throughput while reducing the hardware. The proposed architecture for 16 bit precision is designed and implemented using Xilinx ISE 14.2 and XC3S500E-4FG320 FPGA device. The implementation results show that the proposed architecture improves throughput by 4.5 times.
在现代数字通信系统中,任意采样率转换是计算量最大的任务。此外,通常需要可重构采样率转换器来满足不同无线电标准的采样率要求。本文提出了一种用于FPGA实现任意速率转换器的流水线结构,采用割集重定时和2次幂和(SOPOT)技术来实现高吞吐量,同时减少硬件。采用Xilinx ISE 14.2和XC3S500E-4FG320 FPGA器件设计并实现了16位精度的架构。实现结果表明,该架构的吞吐量提高了4.5倍。
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引用次数: 1
A low phase noise CMOS voltage-controlled differential ring oscillator 一种低相位噪声CMOS压控差分环振荡器
R. Rahul, R. Thilagavathy
The paper presents a novel low phase noise voltage-controlled ring oscillator designed in UMC 0.18μm technology. The proposed design contains nine stages of differential delay cells with multiple-pass loop architecture. Linear frequency - voltage characteristics are exhibited over a wide tuning range. The tuning range of nine-stage ring oscillator is 1.1-2.3 GHz. A phase noise of -108.13dBc/Hz was estimated at an offset of 1MHz from a center frequency of 1.8 GHz. The design uses a 1.8V supply and consumes a maximum power of 65mW while operating at 1.8GHz.
提出了一种采用UMC 0.18μm工艺设计的新型低相位噪声压控环形振荡器。提出的设计包含9级差分延迟单元,具有多通环路结构。线性频率-电压特性在很宽的调谐范围内表现出来。九级环形振荡器的调谐范围为1.1-2.3 GHz。在中心频率为1.8 GHz的偏移1MHz时,估计相位噪声为-108.13dBc/Hz。该设计使用1.8V电源,工作在1.8GHz时最大功率为65mW。
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引用次数: 8
An approach to design a matrix inversion hardware module using FPGA 一种基于FPGA的矩阵反演硬件模块设计方法
G. V. A. Kumar, T. Subbareddy, Bommepalli Madhava Reddy, N. Raju, V. Elamaran
This study work is basically aimed at designing and testing of hardware module to perform inversion operation of a matrix in a small time. Here, an approach is made for calculating 3×3 matrix inverse. There are many mathematical methods available for performing matrix inversion and out of them a suitable method, like Adjoint Matrix Method is selected by analysing the computational requirements. The mathematical method of calculating the inverse of matrix is then suitably converted into VHDL code. The code is then tested for simulation using a set of test matrices. After simulation is verified by checking the results of test inputs the code is tested for synthesizability. After the synthesizability is verified then it is finally tested for hardware verification by dumping into FPGA. Altera's DE1 board which consists a Cyclone-II series FPGA EP2C20F484C7 FPGA is used for this study. The test inputs can be fed in either by using on board GPIO or UI or S RAM. The outputs are taken the same way either by GPIO or UI or written to S RAM and are then to be verified by comparing with actual results.
本研究工作的主要目的是设计和测试硬件模块,在短时间内完成矩阵的反演运算。本文给出了一种计算3×3矩阵逆的方法。进行矩阵反演的数学方法有很多,通过对计算需求的分析,选择了伴随矩阵法等一种适合的方法。然后将计算矩阵逆的数学方法适当地转换为VHDL代码。然后使用一组测试矩阵对代码进行模拟测试。通过对测试输入的结果进行仿真验证后,对代码进行了可合成性测试。在对可合成性进行验证后,将其导入FPGA进行硬件验证。本研究使用Altera公司的DE1板,由Cyclone-II系列FPGA EP2C20F484C7 FPGA组成。测试输入可以通过板载GPIO或UI或S RAM输入。输出以同样的方式通过GPIO或UI或写入S RAM,然后通过与实际结果进行比较来验证。
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引用次数: 11
Improved transmission control protocol model 改进的传输控制协议模型
A. Parashar
Transmission Control Protocol is one of the key protocol of Transport Layer in TCP/IP Protocols suite. While IP transmits data between individual computers on the Internet, TCP transfers data between actual applications running on the system. TCP provides connection oriented and reliable data stream. TCP achieves this reliability by assigning a sequence number to each segment it transmits and requiring a acknowledgment (ACK) from the receiving end. If the ACK is not received within the time-out interval, the data is retransmitted. This research paper describes improved Transmission Control Protocol model which transfers data efficiently among its peer.
传输控制协议是TCP/IP协议套件中传输层的关键协议之一。当IP在因特网上的单个计算机之间传输数据时,TCP在系统上运行的实际应用程序之间传输数据。TCP提供面向连接的可靠数据流。TCP通过为它传输的每个段分配一个序列号并要求接收端确认(ACK)来实现这种可靠性。如果在超时时间内未收到ACK,则重传数据。本文提出了一种改进的传输控制协议模型,该模型可以有效地在对等体之间传输数据。
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引用次数: 1
Efficient computation of configuration space transforms for collision-free motion planning 无碰撞运动规划中构型空间变换的高效计算
Rachit Sapra, Michael J. Mathew, S. Majumder
Robot motion planning in workspace suffers from issues like multiple Inverse Kinematics solutions and computationally expensive collision detection. The concept of Configuration Space was thus introduced in robotics to ease the problem of motion planning. This paper presents an approach to transform obstacles in the workspace to obstacles in the Configuration space for a 2 Degree of Freedom (DOF) R-R planar manipulator. The proposed algorithm uses a single primitive using which various convex and non-convex obstacles in the world can be transformed to their configuration space equivalent. The explicit construction of entire obstacle in configuration space is computationally expensive. Thus, only the boundaries of obstacle in configuration space have been generated by utilizing the properties of configuration space transforms. This approach can be generalized, with some modifications, to represent configuration space obstacles for robots with higher DOF. After reading this paper, the reader should be able to understand the need for configuration space in robotics, some of its essential properties and be able to construct one for planar manipulators.
机器人在工作空间中的运动规划受到多个逆运动学解和计算昂贵的碰撞检测等问题的困扰。因此,在机器人技术中引入了构型空间的概念,以缓解运动规划问题。针对2自由度R-R平面机械臂,提出了一种将工作空间中的障碍物转化为位姿空间中的障碍物的方法。该算法采用单一原语,利用该原语可以将世界上各种凸和非凸障碍物转换为它们的构形空间等效。在构形空间中显式构造整个障碍物的计算成本很高。因此,利用构型空间变换的性质,只生成了构型空间中障碍物的边界。该方法经过一些改进,可以推广到具有较高自由度的机器人构型空间障碍物的表示。在阅读本文后,读者应该能够理解机器人对位形空间的需求,它的一些基本性质,并能够构建平面机械臂的位形空间。
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引用次数: 0
Recent methods for the detection of tumor using computer aided diagnosis — A review 计算机辅助诊断检测肿瘤的最新方法综述
P. Y. Muhammed Anshad, S. Sushanth Kumar
Computer Aided Diagnosis (CAD) is one of the trusted methods in the field of medicine. CAD system assists the doctors for the diagnosis of diseases in higher degree of perfection within a short period of time. Now CAD is the most preferable method for the initial diagnosis of cancer using X-ray, CT, mammogram or MRI images. CAD works as an intermediate in between the radiologist and the input images. The output from CAD doesn't think about as a final result however used as a reference for more tests in the relevant field. In fact CAD helps the doctors for detection of cancer more precisely and early. The combination of artificial intelligence, digital image processing technique and radiological image processing etc makes the CAD system more reliable and efficient. Sensitivity, specificity, absolute detection rate etc are the important parameters of the CAD system. Now CAD system is mostly used for breast cancer detection, lung cancer detection, colon cancer, coronary artery disease, congenital heart defect, lung cancer, bone cancer, brain tumor etc. Any part of body can affect cancer and very high possibility to spread other parts. These days CAD system developed to a great extends, however it's not reached to 100% accuracy. In this article that discusses the necessary options, motivation, findings from the early developments and future expansions of CAD systems.
计算机辅助诊断(CAD)是目前医学领域中较为可靠的诊断方法之一。CAD系统可以在较短的时间内帮助医生更完善地诊断疾病。现在,CAD是x光、CT、乳房x光或核磁共振影像对癌症进行初步诊断时最可取的方法。CAD作为放射科医生和输入图像之间的中介。CAD的输出不作为最终结果,而是作为相关领域更多测试的参考。事实上,CAD可以帮助医生更准确、更早地发现癌症。人工智能、数字图像处理技术和放射图像处理等技术的结合,使CAD系统更加可靠和高效。灵敏度、特异度、绝对检出率等是CAD系统的重要参数。目前CAD系统多用于乳腺癌检测、肺癌检测、结肠癌、冠心病、先天性心脏病、肺癌、骨癌、脑肿瘤等。身体的任何部位都可能发生癌症,并且极有可能扩散到其他部位。近年来,CAD系统得到了很大的发展,但它并没有达到100%的准确性。在本文中,讨论了必要的选项、动机、早期开发的结果以及CAD系统的未来扩展。
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引用次数: 23
Proficient receptive combined address generator archetypal for WiMAX and WiFi deinterleaver precinct 精通WiMAX和WiFi脱交织器区域的接收组合地址生成器原型
K. J. Mohan, Riboy Cheriyan
In this paper a combined responsive address generator archetypal for WiMAX and WiFi deinterleaver unit aimed for using in wireless broadband system is being proposed. Deinterleaver is used in conjunction with forward error correction unit for eliminating and correcting different transmission errors which occurs when signals are transmitted from base station to subscriber station. Address generator unit plays a vital role in deciding the overall performance of deinterleaver section. A novel proficient address generator supporting varying modulation schemes such as QPSK, 16-QAM and 64-QAM for both WiMAX and WiFi systems is being proposed in this paper. By combining the address generator unit we can use this design to generate deinterleaver addresses for both WiMAX and WiFi enabled scenarios with ease. The FPGA and 130 nm standard library AS IC results are studied by modelling the design in VHDL.
本文提出了一种用于无线宽带系统的WiMAX和WiFi脱交织器组合响应式地址发生器原型。除交织器与前向纠错单元一起使用,用于消除和纠正信号从基站向用户站传输时发生的不同传输错误。地址产生单元对去交织器部分的整体性能起着至关重要的作用。本文提出了一种支持多种调制方案(如WiMAX和WiFi系统的QPSK、16-QAM和64-QAM)的新型高效地址发生器。通过结合地址生成单元,我们可以使用此设计轻松地为启用WiMAX和WiFi的场景生成去交织器地址。通过VHDL对该设计进行建模,研究了FPGA和130nm标准库AS集成电路的设计结果。
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引用次数: 0
期刊
2014 International Conference on Control, Instrumentation, Communication and Computational Technologies (ICCICCT)
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