检索结果-内蒙古大学图书馆

2006 IEEE International Conference on Computational Cybernetics, ICCC

作者： Mazurowski, Maciej A. Szecówka, Przemyslaw M. Department of Electrical and Computer Engineering University of Louisville Louisville KY 40292 United States Faculty of Microsystem Electronics and Photonics Wroclaw University of Technology Wroclaw Poland

ISBN: (纸本)1424400716

In this paper the limitations of the sensitivity analysis method for feedforward neural networks in the cases of dependent input variables are discussed. First, it is explained that in such cases there can be many functions implemented by neural networks that will accurately approximate training patterns. Then it is pointed out that many of these functions do not allow for proper estimation of the inputs importance using the sensitivity analysis method for neural networks. These two facts are demonstrated to be the reason why one can not completely rely upon the results of this method, when evaluating a real importance of inputs. Examples with graphs visualizing the discussed phenomena are presented. Finally, general conclusions about overall usefulness of the method are introduced.

关键词： Sensitivity analysis

来源：评论

学校读者我要写书评

暂无评论

Special Issue on Variable Structure System Control — New Designs and Applications

引用

Asian Journal of Control 2008年第4期5卷

作者： Prof. Jian-Xin Xu Prof. Leonid Fridman Department of Electrical and Computer Eng. National University of Singapore 4 Engineering Drive 3 Singapore 117576 Tel +65 6874-2566 Fax +65 6779-1103 Dr Jian-Xin Xu received his Bachelor degree from Zhejiang University China in 1982. He attended the University of Tokyo Japan where he received his Master's and Ph.D. degrees in 1986 and 1989 respectively. All his degrees are in Electrical Engineering. He worked for one year in the Hitachi research Laboratory Japan and for more than one year in Ohio State University U.S.A. as a Visiting Scholar. In 1991 he joined the National University of Singapore and is currently an associate professor in the Department of Electrical Engineering. His research interests lie in the fields of learning control variable structure control fuzzy logic control discontinuous signal processing and applications to motion control and process control problems. He is the associate editor of Asian Journal of Control member of TC on variable structure systems and sliding mode control of IEEE Control Systems Society and a senior member of IEEE. He has produced more than 90 peer-refereed journal papers near 160 technical papers in conference proceedings and authored/edited 4 books. Division de Estudios de Posgrado Facultad de Ingenieria National Autonomous University of Mexico DEP-FI UNAM Edificio “A” Circuito Exterior Ciudad Universitaria A. P. 70–256 C.P.04510 Mexico D.F. Mexico Tel +52 55 56223014 Fax +52 55 56161719 Dr. Leonid M. Fridman received his M.S in mathematics from Kuibyshev (Samara) State University Russia Ph.D. in Applied Mathematics from Institute of Control Science (Moscow) and Dr. of Science degrees in Control Science from Moscow State University of Mathematics and Electronics in 1976 1988 and 1998 respectively. In 1976–1999 Dr. Fridman was with the Department of Mathematics at the Samara State Architecture and Civil Engineering Academy Samara Russia. In 2000–2002 he was with the Department of Postgraduate Study and Investigations at the Chihuahu

来源：评论

学校读者我要写书评

暂无评论

Organic vaporensors based on single-walled CNTs

Organic vaporensors based on single-walled CNTs

引用

2006 5th IEEE Conference on Sensors

作者： Chaisitsak, Sutichai Chaithongrat, Buaworn Nukeaw, Jiji Tuantranont, Adisorn Department of Electronics Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand Department of Applied Physics King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand National Electronics and Computer Technology Center Pathumthani 12120 Thailand

ISBN: (纸本)1424403766

An investigation of the influence of organic vapor (ethanol, methanol and acetone) on the characteristics of simple-structure sensors fabricated from single-walled carbon nanotube (SWCNT) thin films is reported. SWCNTs were directly deposited, by using atmospheric pressure CVD using alcohol-ferrocene mist, on the patterned Al electrodes to fabricate a sensor. It was found that the characteristic of SWCNT-based sensors depended on the depositing position in CVD reactor. The sensor response could be optimized by adjusting the depositing position along the inner quartz reactor. The sensor reproducibility could be improved by light soaking after switching to air. © 2006 IEEE.

关键词： Organometallics

来源：评论

学校读者我要写书评

暂无评论

Design, functionality and testability of a multi-channel ASIC for digital X-ray imaging

Design, functionality and testability of a multi-channel ASI...

引用

International Conference on Mixed Design of Integrated Circuits and Systems, MIXDES 2006

作者： Gryboś, P. Idzik, M. Maj, P. Świentek, K. AGH University of Science and Technology Poland Faculty of Physics and Applied Computer Science AGH University of Science and Technology Al Mickiewicza 30 30-059 Kraków Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics AGH University of Science and Technology Al Mickiewicza 30 30-059 Kraków Poland

ISBN: (纸本)8392263219

This paper presents the design and results of first measurements of a fast binary readout architecture ASIC aimed for digital X-ray imaging. The ASIC called DEDIX includes 64 readout channels, a number of DACs for different bias and threshold settings, voltage reference, temperature sensor circuit, calibration circuit, I/O circuit and a control logic circuit. Each readout channel consists of charge amplifier, PZC circuit, shaper, two discriminators and two 20-bit counters. The DEDIX is supposed to work in a relatively complex systems featuring several hundred detector channels. For this reason particular attention was paid to general system solutions and the circuit testability. This paper is essentially dedicated to these aspects of DEDIX operation. The circuit was implemented in a 3.3 V 0.35 μm CMOS technology. First tests confirm full functionality of the ASIC. Copyright © 2006 by Department of Microelectronics & computer Science, Technical University of Lodz.

关键词： Application specific integrated circuits

来源：评论

学校读者我要写书评

暂无评论

Adaptive routing and wireless location for 3G Ad-Hoc networks in multipath fading channels

Adaptive routing and wireless location for 3G Ad-Hoc network...

引用

23rd National Radio Science Conference, NRSC 2006

作者： Ashry, Moustafa F. Saeb, Magdy M. El-Khamy, Said E. Department of Electronics and Communication Engineering School of Engineering Arab Academy for Science and Technology and Maritime Transport Alexandria Egypt Department of Computer Engineering School of Engineering Arab Academy for Science and Technology and Maritime Transport Alexandria Egypt Department of Electrical Engineering Faculty of Engineering Alexandria University Alexandria 21544 Egypt IEEE

The aim of this paper is to propose a new adaptive technique to improve the performance of 3G Ad-Hoc networks based on CDMA2000 in fading channels. The RAKE receiver combined with channel searchers provide improved estimation of the Time of Arrival and Amplitude of Arrival of the strongest received signal. Ad-Hoc networks based on the Grid protocol are considered for the analysis and simulation. A novel two-dimension figure of merit is suggested to describe the channel effects on delay and amplitude estimation. Errors in delay are corrected by adaptively increasing the number of RAKE fingers while the amplitude errors are corrected through adaptive power control.

关键词： Multipath fading

来源：评论

学校读者我要写书评

暂无评论

DEDIX - Development of fully integrated multichannel ASIC for high count rate digital x-ray imaging systems

DEDIX - Development of fully integrated multichannel ASIC fo...

引用

2006 IEEE Nuclear Science Symposium, Medical Imaging Conference and 15th International Workshop on Room-Temperature Semiconductor X- and Gamma-Ray Detectors, Special Focus Workshops, NSS/MIC/RTSD

作者： Grybos, P. Maj, P. Szczygiel, R. Ramello, L. Idzik, M. Swientek, K. Stobiecki, T. Faculty of Electrical Engineering Automatics Computer Science and Electronics Department of Measurement and Instrumentation AGH University of Science and Technology Al. Mickiewicza 30 30-059 Cracow Poland Dip. Scienze e Tecnologie Avanzate Universita del Piemonte Orientale INFN Alessandria Italy Faculty of Physics and Applied Computer Science AGH University of Science and Technology Al. Mickiewicza 30 30-059 Cracow Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics Department of Electronics AGH University of Science and Technology Al. Mickiewicza 30 30-059 Cracow Poland

ISBN: (纸本)1424405610

We present the development of a 64 channel readout ASIC called DEDIX for high count rate position-sensitive measurements using semiconductor detectors. The ASIC is designed in 0.35 μm CMOS process and its total area is 3400×5000 μm2. The DEDIX has a binary readout architecture. Each channel is built of a charge sensitive amplifier (CSA) with a pole-zero cancellation circuit, a shaper, two independent discriminators and two independent 20-bit counters. The size of the input device in CSA has been optimized for a detector capacitance in the range of 1-3 pF per strip. An equivalent noise charge of 110 el rms has been achieved for a total detector capacitance of 1 pF at the shaper peaking time of 160 ns. Internal correction DAC implemented in each channel independently ensures the low spread of effective threshold of discriminators at 0.4 mV on one sigma level. The mean gain in the multichannel ASIC is 54 μV/el, with a good uniformity from channel to channel (sd/mean = 0.8%). Low noise performance and high rate capability have been demonstrated by the measurement up to and above 1 MHz of average rate of input signals. © 2006 IEEE.

关键词： Imaging systems

来源：评论

学校读者我要写书评

暂无评论

Correcting Infrared Focal Plane Array Sensor Non Uniformities Based Upon Adaptive Filter

Correcting Infrared Focal Plane Array Sensor Non Uniformitie...

引用

IEEE International Conference on Image Processing

作者： Ajay Kumar S. Sarkar R.P. Agarwal Department of Electronics & Computer Engineering Indian Institute of Technology India Department of Electronics & Computer Engineering Indian Institute of Technology Roorkee India Faculty of Engineering and Technology Mody Institute of Technology Sikar Rajasthan India

The spatial and temporal non-uniformities in infrared focal plane array (IRFPA), which is called as fixed pattern noise, results a slowly varying pattern on the thermal image thus degrading the resolving capabilities of thermal imaging system considerably. An adaptive filter based technique is presented to correct fixed pattern noise. This method uses kalman filter and corrects both the additive and multiplicative types of fixed pattern noise thus eliminating the need of halting the operation of thermal camera for calibration. A FPGA based approach is presented for implementing the proposed method. The result obtained and the performance parameter of the algorithm is presented.

关键词： Sensor arrays Infrared sensors Adaptive arrays Adaptive filters Additive noise Infrared imaging Thermal degradation Spatial resolution Image resolution Optical imaging

来源：评论

学校读者我要写书评

暂无评论

Straight and Circular Road Driving Control for Power Assisted Wheelchair Based on Fuzzy Algorithm

Straight and Circular Road Driving Control for Power Assiste...

引用

Annual Conference of Industrial electronics Society

作者： Hirokazu Seki Susumu Tadakuma Department of Electrical Electronics and Computer Engineering Faculty of Engineering Chiba Institute of Technology Chiba Japan

This paper describes a novel straight and circular road driving control scheme for electric power assisted wheelchairs. "Electric power assisted wheelchair" which assists the driving force by electric motors is expected to be widely used as a mobility support system for elderly people and disabled people, however, the performance of the straight and circular road driving must be further improved because the two wheels drive independently. This paper proposes a novel driving control scheme based on fuzzy algorithm to realize the stable and reliable driving on straight and circular roads. The suitable assisted torque of the right and left wheels is determined by fuzzy algorithm based on the posture angular velocity of the wheelchair and the human input torque proportion of the right and left wheels. Some experiments on the practical roads show the effectiveness of the proposed control system

关键词： Wheelchairs Fuzzy control Roads Wheels Torque Electric motors Senior citizens Drives Angular velocity Humans

来源：评论

学校读者我要写书评

暂无评论

Novel Step Climbing Control for Power Assisted Wheelchair Based on Driving Mode Switching

Novel Step Climbing Control for Power Assisted Wheelchair Ba...

引用

Annual Conference of Industrial electronics Society

作者： Hirokazu Seki Takashi Iijima Hideaki Minakata Susumu Tadakuma Department of Electrical Electronics and Computer Engineering Faculty of Engineering Chiba Institute of Technology Chiba Japan

This paper describes a novel step climbing control scheme for electric power assisted wheelchairs. "Electric power assisted wheelchair" which assists the driving force by electric motors is expected to be widely used as a mobility support system for elderly people and disabled people. This research aims at realizing the safe and reliable step climbing motion control of power assisted wheelchairs because power assisted wheelchairs are in danger of overturning backward when raising the front wheels due to the excessive driving torque and of stopping in front of steps when the rear wheels try to climb over steps due to the insufficient driving torque. This paper proposes a novel step climbing control scheme for power assisted wheelchairs based on driving mode switching. The first driving mode, "front wheel raising mode", applies torque control system with the variable assistance ratio to prevent the dangerous overturning. The second driving mode, "rear wheel climbing mode", applies position control system based on the polynomial trajectory to surely climb over steps and stop at the suitable position. The mode switching control based on these two driving modes can generate the safe and reliable step climbing motions. Some experiments show the effectiveness of the proposed control system

关键词： Wheelchairs Wheels Motion control Electric motors Senior citizens Power system reliability Torque control Position control Polynomials Control systems

来源：评论

学校读者我要写书评

暂无评论

Implementation of 4-channel image transmultiplexer in FPGA

Implementation of 4-channel image transmultiplexer in FPGA

引用

International Conference on Signals and Electronic Systems, ICSES'06

作者： Sypka, Przemyslaw Rajda, Pawel J. Sudól, Martin Department of Electronics AGH University of Science and Technology al. Mickiewicza 30 30-059 Kraków Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics AGH University of Science and Technology al. Mickiewicza 30 30-059 Kraków Poland

A transmultiplexer combines several images into one image to be sent through a single communication channel is presented. The paper presents the implementation of such system in Field Programmable Gate Arrays. The pro... 详细信息

ISBN: (纸本)8392117263

关键词： Field programmable gate arrays (FPGA)

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：