检索结果-内蒙古大学图书馆

15th WSEAS International Conference on Systems, Part of the 15th WSEAS CSCC Multiconference

作者： Wee, Lai Khin Chai, Hum Yan Wen, Lee Siew Supriyanto, Eko Department of Clinical Science and Engineering Faculty of Health Science and Biomedical Engineering Universiti Teknologi Malaysia UTM Skudai 81310 Johor Malaysia Faculty of Computer Science and Automation Institute of Biomedical Engineering and Informatics Technische Universität Ilmenau 98684 Ilmenau Germany

ISBN: (纸本)9781618040237

Ultrasound scanning system is a non ionizing technique for breast mammography. Unfortunately, ultrasound has not approved by FDA as a screening tool yet due to the lack of spatial resolution and high operator dependent. Therefore, the quality of imaging depends on the operator technique and experience. The purpose of this project is to develop an automated 2D motion system for ultrasound scanning designed for breast cancer patient. The scanning was performed by automated movement of a transducer during image acquisition. Therefore, the automated motion system needs a very high precision of position control system which integrated with a microcontroller and two appropriate distance sensors on each axis. Besides, graphical user interface has been designed to interface between the microcontroller and personal computer. The control method for the automated motion system can achieve a resolution of 2mm. This is used to replace the conventional handholding ultrasound probe and to increase the spatial resolution of ultrasound.

关键词： Controllers

来源：评论

学校读者我要写书评

暂无评论

A novel programmable waveform generator for ultrasound therapy machine using FPGA

A novel programmable waveform generator for ultrasound thera...

引用

15th WSEAS International Conference on Systems, Part of the 15th WSEAS CSCC Multiconference

作者： Wee, Lai Khin Supriyanto, Eko Department of Clinical Science and Engineering Faculty of Health Science and Biomedical Engineering Universiti Teknologi Malaysia UTM Skudai 81310 Johor Malaysia Faculty of Computer Science and Automation Institute of Biomedical Engineering and Informatics Technische Universität Ilmenau 98684 Ilmenau Germany

ISBN: (纸本)9781618040237

The current ultrasound therapy machines are implementing continuous waveform, which in fact, is not an optimum technique for therapy treatment process. Apparently, pulse waveform appearing as a more effectively way of signal generation in terms of its power consumption, low cost hardware and short timing used. In order to overcome these drawbacks of conventional therapy machines, we proposed a programmable pulse generator for pulse waveform production with high frequency more than 1MHz through Cyclone 2 Field Programmable Gate Array (FPGA) development board. The generator is developed with maximum controllable 10 number of burst and clock frequency 50MHz. Register Transfer Level designs with Very-High-Speed Integrated Circuit Hardware Description Language (VHDL) coding are also implemented throughout this project. Pin assignment was used to assign the pin connection in FPGA for linkage of input and output data of FPGA. The result of generated waveforms were observed using oscilloscope. Based on the findings, the developed programmable FPGA is able to produce high frequency signal effectively and accurately.

关键词： computer hardware description languages

来源：评论

学校读者我要写书评

暂无评论

Edge detection in ultrasound images using speckle reducing anisotropic diffusion in Canny edge detector framework

Edge detection in ultrasound images using speckle reducing a...

引用

15th WSEAS International Conference on Systems, Part of the 15th WSEAS CSCC Multiconference

作者： Chai, Hum Yan Wee, Lai Khin Supriyanto, Eko Department of Clinical Science Engineering Faculty of Health Science and Biomedical Engineering Universiti Teknologi Malaysia UTM Skudai 81310 Johor Malaysia Faculty of Computer Science and Automation Institute of Biomedical Engineering and Informatics Technische Universität Ilmenau 98684 Ilmenau Germany

ISBN: (纸本)9781618040237

Conventional Canny edge detector can detect edges in image with additive noise effectively but not ultrasound image that are corrupted by multiplicative speckle noise which alleviates image resolution resulting in inaccurate characterization of object features. In this paper, we proposed to incorporate the modified SRAD into the Canny edge detector to replace the Gaussian blurring in the conventional Canny edge detector in order to suppress the multiplicative noise effectively while preserving the edge of the object in ultrasound image. The result shows that the proposed method can provide better result than conventional method in a much wider range of parameter values. The proposed method through experimental result indicates that it is capable of producing promising edge detection result in ultrasound image.

关键词： Edge detection

来源：评论

学校读者我要写书评

暂无评论

Extended robust diffusion algorithm for two dimensional ultrasonic images

Extended robust diffusion algorithm for two dimensional ultr...

引用

15th WSEAS International Conference on Systems, Part of the 15th WSEAS CSCC Multiconference

作者： Wee, Lai Khin Chai, Hum Yan Supriyanto, Eko Department of Clinical Science and Engineering Faculty of Health Science and Biomedical Engineering Universiti Teknologi Malaysia UTM Skudai 81310 Johor Malaysia Faculty of Computer Science and Automation Institute of Biomedical Engineering and Informatics Technische Universität Ilmenau 98684 Ilmenau Germany

ISBN: (纸本)9781618040237

Ultrasound medical imaging is widely used nowadays in clinical application due to its intuitive, convenient, safety, non-invasive, and low cost. However, ultrasound image formation always comes with speckle-noise which will greatly reduce the image quality, and makes the identification and analysis of image detail become more challenging. Hence, we present an extended robust diffusion algorithm for optimum diffusion while retain the edge of image features. Total eight spreading diffusion directions are implemented in the proposed algorithm. Finding showed that this method is able to provide consistent and more objective results.

关键词： Speckle

来源：评论

学校读者我要写书评

暂无评论

Diagnosis of industrial systems driven by electrical machines with a low cost platform

Diagnosis of industrial systems driven by electrical machine...

引用

8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2011

作者： Munteanu, Radu Moga, Daniel Petreus, Dorin Stroia, Nicoleta Barabas, Zsolt Hrebenciuc, Florin Faculty of Electrical Engineering Technical University of Cluj- Napoca Romania Faculty of Automation and Computer Science Romania Faculty of Electronics and Telecommunication Power Electronics Romania Power Electronics Society Romania Control Engineering Technical University of Cluj-Napoca Romania Electrical Engineering Technical University of Cluj-Napoca Romania

ISBN: (纸本)9781424493036

A low cost hardware platform consisting of a measurement system, a communication system and a data processing system is presented. Wired and wireless sensors are developed for supporting motor current signature analysis (MCSA), vibration signature analysis (VSA) and operational temperature monitoring. A "plug and play" software application is implemented for allowing remote computers to share this sensor data using OPC technology. Using Matlab as an OPC client, time-domain and frequency-domain signal processing techniques are used in order to determine the signatures associated with faults of locally or remote operating electrical machines. © 2011 IEEE.

关键词： MATLAB

来源：评论

学校读者我要写书评

暂无评论

Comparative Performance Evaluation of Large FPGAs with CNFET-and CMOS-based Switches in Nanoscale

引用

Nano-Micro Letters 2011年第3期3卷 178-188页

作者： Mohammad Hossein Moaiyeri Ali Jahanian Keivan Navi Faculty of Electrical and Computer Engineering. Shahid Beheshti University G.C. Nanotechnology and Quantum Computing Lab. Shahid Beheshti University G. C. VLSI Design Automation Lab. Shahid Beheshti University G. C.

Routing resources are the major bottlenecks in improving the performance and power consumption of the current FPGAs. Recently reported researches have shown that carbon nanotube field effect transistors(CNFETs) have considerable potentials for improving the delay and power consumption of the modern FPGAs. In this paper, hybrid CNFET-CMOS architecture is presented for FPGAs and then this architecture is evaluated to be used in modern FPGAs. In addition, we have designed and parameterized the CNFET-based FPGA switches and calibrated them for being utilized in FPGAs at 45 nm, 22 nm and 16 nm technology *** results show that the CNFET-based FPGA switches improve the current FPGAs in terms of performance, power consumption and immunity to process and temperature variations. Simulation results and analyses also demonstrate that the performance of the FPGAs is improved about 30%, on average and the average and leakage power consumptions are reduced more than 6% and 98% respectively when the CNFET switches are used instead of MOSFET FPGA switches. Moreover, this technique leads to more than 20.31%smaller area. It is worth mentioning that the advantages of CNFET-based FPGAs are more considerable when the size of FPGAs grows and also when the technology node becomes smaller.

关键词： Carbon nanotube field effect transistor(CNFET) FPGA switches Performance evaluation Power consumption Process variation

来源：评论

学校读者我要写书评

暂无评论

An intelligent approach for speed stability analysis of a travelling wave ultrasonic motor based on genetic k-NN algorithm

An intelligent approach for speed stability analysis of a tr...

引用

2011 5th International Conference on Application of Information and Communication Technologies, AICT 2011

作者： Colak, Ilhami Yesilbudak, Mehmet Sagiroglu, Seref Kahraman, H. Tolga Department of Electrical and Electronics Engineering Faculty of Technology Gazi University Ankara Turkey Department of Electronics and Automation Vocational College of Haci Bektas Veli Nevsehir University Nevsehir Turkey Department of Computer Engineering Faculty of Engineering Gazi University Ankara Turkey Department of Software Engineering Faculty of Technology Karadeniz Technical University Trabzon Turkey

ISBN: (纸本)9781612848310

Driving voltage, driving frequency, phase difference and operating temperature are the parameters which affect the speed stability of a travelling wave ultrasonic motor (TWUSM). The weight coefficients of these parameters should be determined for the purpose of ensuring the speed stability of a TWUSM with a maximum level under different operating conditions. In this paper, a novel approach is proposed for the speed stability analysis of the TWUSM using genetic k-nearest neighbor algorithm (k-NN) and the speed stability classes of new test observations are achieved accurately. Furthermore, the genetic k-NN algorithm is compared with the classic k-NN algorithm in terms of prediction accuracy using Euclidean, Manhattan and Minkowski distance metrics. As a result of experimental studies, it is shown that the TWUSM parameters weighted by the genetic k-NN algorithm increase the speed stability of the TWUSM significantly and the genetic k-NN algorithm outperforms the classic k-NN algorithm for all of distance metrics. © 2011 IEEE.

关键词： Nearest neighbor search

来源：评论

学校读者我要写书评

暂无评论

An intelligent decision support tool for a travelling wave ultrasonic motor based on k-nearest neighbor algorithm

An intelligent decision support tool for a travelling wave u...

引用

10th International Conference on Machine Learning and Applications, ICMLA 2011

作者： Sagiroglu, Seref Kahraman, H. Tolga Yesilbudak, Mehmet Colak, Ilhami Department of Computer Engineering Faculty of Engineering Gazi University Ankara Turkey Department of Software Engineering Faculty of Technology Karadeniz Technical University Trabzon Turkey Department of Electronics and Automation Vocational College of Haci Bektas Veli Nevsehir University Nevsehir Turkey Department of Electrical and Electronics Engineering Faculty of Technology Gazi University Ankara Turkey

ISBN: (纸本)9780769546070

Driving frequency, amplitude and phase difference of two-phase sinusoidal voltages are the input parameters which have influence on speed stability of travelling wave ultrasonic motors (TWUSMs).These parameters are also time-varying due to the variations in operating temperature. In addition, a complete mathematical model of the TWUSM has not been derived yet. Owing to these reasons, a machine learning approach is required for determining the compatibility of operating parameters related to speed stability of TWUSMs. For this purpose, an intelligent decision support tool has been designed for TWUSMs in this study. The input parameters such as driving frequency, amplitude, phase difference of two-phase sinusoidal voltages and operating temperature were evaluated by the k-nearest neighbor algorithm in the decision support tool. The results have shown that the proposed tool provides effective results in the compatibility determination of operating parameters related to speed stability of TWUSMs. © 2011 IEEE.

关键词： Piezoelectric motors

来源：评论

学校读者我要写书评

暂无评论

Dual Graph Error Propagation Model for Mechatronic System Analysis

引用

IFAC Proceedings Volumes 2011年第1期44卷 9893-9898页

作者： Andrey Morozov Klaus Janschek Institute of Automation Faculty of Electrical and Computer Engineering Technische Universität Dresden 01187 Germany

Abstract Error propagation analysis is an important part of a system development process. This paper addresses a model based analysis of spreading of data errors through mechatronic systems. Error propagation models for such kind of systems must use an abstraction level, which allows the proper mapping of the mutual interaction of heterogeneous system elements such as software, hardware and physical parts. A number of appropriate approaches have been introduced in recent years. The majority of them are based only on a data flow analysis. It is shown in this paper that for a complete picture the system control flow has to be considered as well. A new approach based on probabilistic control flow and data flow graphs is presented. The structures of the graphs can be derived systematically from an UML/SysML model of a system. The knowledge about an operational system profile allows the definition of additional system properties. Initially this model was developed for software errors localization. This paper shows its applicability to the error propagation analysis of an entire mechatronic system. The paper presents the modeling concept, the complete mapping process and application of the model for error localization. A reference robot control example demonstrates the main modeling steps.

关键词： Control system analysis Data flow analysis Error analysis Markov models

来源：评论

学校读者我要写书评

暂无评论

Trajectory tracking control of pendulum with variable length by partial energy shaping

Trajectory tracking control of pendulum with variable length...

引用

作者： Xin, Xin Shinji, Tatsuya Yamasaki, Taiga Sun, Changyin Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan School of Automation Southeast University Nanjing 210096 China

ISBN: (纸本)9783902661937

This paper concerns a trajectory tracking control problem for a pendulum with variable length, which is an underactuated mechanical system of two degrees-of-freedom with a single input of adjusting the length of the pendulum. We aim to study whether it is possible to design a time-invariant control law to pump appropriate energy into the variable-length pendulum for achieving a desired swing motion (trajectory) with given desired energy and length of the pendulum. First, we show that it is difficult to avoid singular points in the controller designed by using the conventional energy-based control approach in which the total mechanical energy of the system is controlled. Second, we propose a tracking controller free of singular points by shaping only the kinetic energy of rotation and the potential energy of the pendulum and not utilizing the kinetic energy related to the motion along the rod. Third, we analyze globally the motion of the pendulum and clarify the stability issue of some closed-loop equilibrium points;and we also provide some conditions on control parameters for achieving the tracking objective. Finally, we present numerical simulation results to validate the presented theoretical results. © 2011 IFAC.

关键词： Pendulums

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：