检索结果-内蒙古大学图书馆

Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Aadeel Akhtar Levi J. Hargrove Timothy Bretl Department of Electrical & Computer Engineering University of Illinois at Urbana-Champaign (UIUC) and with the Medical Scholars Program University of Illinois College of Medicine Urbana IL 61801 USA Department of Physical Medicine and Rehabilitation Northwestern University Evanston IL 60208 USA and with the Center for Bionic Medicine at the Rehabilitation Institute of Chicago Chicago IL 60611 USA Department of Aerospace Engineering UIUC Urbana IL 61801 USA

ISBN: (纸本)9781424441198

Current state-of-the-art upper limb myoelectric prostheses are limited by only being able to control a single degree of freedom at a time. However, recent studies have separately shown that the joint angles corresponding to shoulder orientation and upper arm EMG can predict the joint angles corresponding to elbow flexion/extension and forearm pronation/ supination, which would allow for simultaneous control over both degrees of freedom. In this preliminary study, we show that the combination of both upper arm EMG and shoulder joint angles may predict the distal arm joint angles better than each set of inputs alone. Also, with the advent of surgical techniques like targeted muscle reinnervation, which allows a person with an amputation intuitive muscular control over his or her prosthetic, our results suggest that including a set of EMG electrodes around the forearm increases performance when compared to upper arm EMG and shoulder orientation. We used a Time-Delayed Adaptive Neural Network to predict distal arm joint angles. Our results show that our network’s root mean square error (RMSE) decreases and coefficient of determination (R2) increases when combining both shoulder orientation and EMG as inputs.

关键词： tate-of-the-art EMG can predict targeted muscle reinnervation

来源：评论

学校读者我要写书评

暂无评论

Lateral organic photodetectors for imaging applications

Lateral organic photodetectors for imaging applications

引用

Medical Imaging 2011: Physics of Medical Imaging

作者： Shafique, Umar Karim, Karim S. Nano-Technology Program Electrical and Computer Engineering Department University of Waterloo Canada

ISBN: (纸本)9780819485038

Organic semiconductor detectors have always been in active research interest of researchers due to its low fabrication cost. Vertical organic detectors have been studied in the past but not much of the works have been done on lateral organic detectors. The lateral design has an advantage over the vertical design that it is easy to fabricate and can be easily integrated with the backplane TFT imager circuit. Integrating an organic photodetectors with TFT imager can improve the over all sensitivity of the imager. However the lateral design limits the fill-factor. Here in our work we propose a new bilayered lateral organic photodetectors with Copper-Phthalocyanine (CUPC) as top and Perylene- Tetracarboxylic Bis- Benzimidazole (PTCBI) as the bottom layer organic material. The bottom organic semiconductor layer work as both, charge transport layer and photon absorption layer. The top and bottom layer provides and heterojunction a potential gradient enough to separate the photo generated excitons in to electrons and holes. The incident photons are absorbed in the two layers active layers giving an exciton. These excitons see a potential barrier at the CUPC-PTCBI heterojunction and separated into holes and electrons. The separated electrons are directed by the external applied electric field and thus give a increase in photocurrent. Lateral organic photodetectors are simple to design and have low dark current. The photo-response of these photo detectors is observed approximately three orders higher in magnitude compare able to its dark response. The dual layer has an advantage of tuning the devices for different absorption wavelengths and were observed more stable comparable to vertical devices. © 2011 SPIE.

关键词： Photodetectors

来源：评论

学校读者我要写书评

暂无评论

A distributed reconfigurable active SSD platform for data intensive applications

A distributed reconfigurable active SSD platform for data in...

引用

13th IEEE International Workshop on FTDCS 2011, the 8th International Conference on ATC 2011, the 8th International Conference on UIC 2011 and the 13th IEEE International Conference on HPCC 2011

作者： Abbani, Noor Ali, Ali Otoom, Doa'A Al Jomaa, Mohamad Sharafeddine, Mageda Artail, Hassan Akkary, Haitham Saghir, Mazen A.R. Awad, Mariette Hajj, Hazem Department of Electrical and Computer Engineering American University of Beirut Beirut Lebanon Electrical and Computer Engineering Program Texas A and M University at Qatar Doha Qatar

ISBN: (纸本)9780769545387

In this paper, we propose to combine active solid state drives and reconfigurable FPGAs into a storage-compute node to use as a building block in a distributed, high performance computation platform for data intensive applications. We propose a complete framework for middleware functionality through an API abstraction layer that hides the complexity of accessing and processing data stored on these distributed nodes, thus allowing program.ers to focus on the application, and not the underlying specialized architecture. The application in turn is re-architected to maximize its performance by delegating selected computations down to the storage-compute node. We present preliminary results measured on a real hardware prototype of a single-node. These results show that our proposed architecture provides more than a 2x improvement in performance over non-reconfigurable active-disk architectures that use electromechanical disks for storage and a 6x improvement in performance over a platform that performs the computation on the middle server. © 2011 IEEE.

关键词： Middleware

来源：评论

学校读者我要写书评

暂无评论

Building better interdisciplinary scientists: creating graduate level courses to address the communication gap in interdisciplinary research

引用

BMC Bioinformatics 2012年第12期13卷 1-2页

作者： Denise R Koessler Elizabeth G Johnson Jordan M Utley Harry A Richards Cynthia B Peterson Department of Electrical Engineering and Computer Science The University of Tennessee Knoxville TN 37996 USA Department of Microbiology The University of Tennessee Knoxville TN 37996 USA UT/ORNL Graduate School of Genome Science and Technology The University of Tennessee Knoxville TN 37996 USA SCALE-IT Program Administrator The University of Tennessee Knoxville TN 37996 USA Department of Biochemistry and Molecular Biology The University of Tennessee Knoxville TN 37996 USA

来源：评论

学校读者我要写书评

暂无评论

Microstructural and electrical properties of Ce_0.9Gd_0.1O1.95 thin film electrolyte in solid oxide fuel cells (vol 26, pg 854, 2011)

引用

JOURNAL OF MATERIALS RESEARCH 2011年第11期26卷 854-859页

作者： Cho, Sungmee Yoon, Jongsik Kim, Jung-Hyun Zhang, Xinghang Manthiram, Arumugam Wang, Haiyan [a1 ]Department of Electrical and Computer Engineering Texas A&M University College Station Texas 77843-3128[a2 ]Electrochemical Energy Laboratory and Materials Science and Engineering Program University of Texas at Austin Austin Texas 78712[a3 ]Department of Mechanical Engineering Texas A&M University College Station Texas 77843-3123[a4 ]Electrochemical Energy Laboratory and Materials Science and Engineering Program University of Texas at Austin Austin Texas 78712[a5 ]Department of Electrical and Computer Engineering Texas A&M University College Station Texas 77843-3128

Microstructural and electrical properties of Gd-doped CeO2 (GDC; Ce0.9Gd0.1O1.95) thin films prepared by pulsed laser deposition as an electrolyte in solid-oxide fuel cells (SOFCs) were investigated. The GDC thin film... 详细信息

Microstructural and electrical properties of Gd-doped CeO₂ (GDC; Ce_0.9Gd_0.1O_1.95) thin films prepared by pulsed laser deposition as an electrolyte in solid-oxide fuel cells (SOFCs) were investigated. The GDC thin films were prepared on various substrates including single-crystal yttria-stabilized zirconia (YSZ) and magnesium oxide (MgO) substrates. The GDC thin-film electrolytes with different grain sizes and grain morphologies were prepared by varying the deposition parameters, such as substrate temperature, oxygen partial pressure, target repetition rate, and laser ablation energy. The microstructural properties of these films were examined using X-ray diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM). Alternating-current (AC) and direct-current (DC) electrical measurements through in-plane method show that the electrical property of the GDC thin film strongly depends on grain size, e.g., the total conductivity of the films deposited at 700 C (7.3 10³ S/cm) is about 20 times higher than the ones deposited at room temperature (3.6 10⁴ S/cm) at the measurement temperature of 600 C.

关键词： Thin Film electrical Properties Physical Vapor Deposition (PVD)

来源：评论

学校读者我要写书评

暂无评论

Joint switched transmit diversity and adaptive modulation in spectrum sharing systems

Joint switched transmit diversity and adaptive modulation in...

引用

2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011

作者： Qaraqe, Khalid A. Bouida, Zied Abdallah, Mohamed Alouini, Mohamed-Slim Department of Electrical and Computer Engineering Texas A and M University at Qatar Doha Qatar Electrical Engineering Program KAUST Thuwal Mekkah Province Saudi Arabia

ISBN: (纸本)9781936968190

Under the scenario of an underlay cognitive radio network, we propose in this paper an adaptive scheme using switched transmit diversity and adaptive modulation in order to minimize the average number of switched branches at the secondary transmitter while increasing the capacity of the secondary link. The proposed switching efficient scheme (SES) uses the scan and wait (SWC) combining technique where a transmission occurs only when a branch with an acceptable performance is found, otherwise data is buffered. In our scheme, the modulation constellation size and the used transmit branch are determined to achieve the highest spectral efficiency with a minimum processing power, given the fading channel conditions, the required error rate performance, and a peak interference constraint to the primary receiver. Selected numerical examples show that the SES scheme minimizes the average number of switched branches for the average and the high secondary signal-to-noise ratio range. This improvement comes at the expense of a small delay introduced by the SWC technique. For reference, we also compare the performance of the SES scheme to the selection diversity scheme (SDS) where the best branch verifying the modulation mode and the interference constraint is always selected. © 2011 ICST.

关键词： Adaptive modulation

来源：评论

学校读者我要写书评

暂无评论

Value of module efficiency in real operating conditions for low energy cost PV systems

Value of module efficiency in real operating conditions for ...

引用

37th IEEE Photovoltaic Specialists Conference, PVSC 2011

作者： Wang, Xiaoting Barnett, Allen Solar Power Program Department of Electrical and Computer Engineering University of Delaware Newark DE United States

ISBN: (纸本)9781424499656

Reduced energy cost is essential for photovoltaics (PV) to be adopted as one of the major electricity sources for terrestrial applications. It is quantitatively proved in this work that PV module efficiency is a critical factor in achieving low cost solar electricity. Especially, for concentrating photovoltaics (CPV) to be competitive with flat plate PV, its module efficiency must be greater than 30% even if the tracker price can be cut by 50%. After recognizing the significance of CPV module efficiency, the efficiency losses in a currently existing high concentration (high-X) CPV module are analyzed under real operating conditions. Based on the understanding of the efficiency loss mechanisms, potential solutions are proposed. © 2011 IEEE.

关键词： Costs

来源：评论

学校读者我要写书评

暂无评论

The use of a novel carbon nanotube coated microelectrode array for chronic intracortical recording and microstimulation

The use of a novel carbon nanotube coated microelectrode arr...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Rebecca A. Parker Sandeep Negi Tyler Davis Edward W Keefer Harvey Wiggins Paul A House Bradley Greger Interdepartmental Program in Neuroscience University of Utah Salt Lake City UT 84112 USA Electrical and Computer Engineering Department University of Utah Salt Lake City UT 84112 Bioengineering Department University of Utah Salt Lake City UT 84112 Plexon Inc. Dallas TX 75206 Department of Neurosurgery University of Utah Salt Lake City UT 84132

ISBN: (纸本)9781424441198

Micro-electrode arrays (MEAs) have been used in a variety of intracortical neural prostheses. While intracortical MEAs have demonstrated their utility in neural prostheses, in many cases MEA performance declines after several months to years of in vivo implantation. The application of carbon nanotubes (CNTs) may increase the functional longevity of intracortical MEAs through enhanced biocompatibility and charge injection properties. An MEA metalized with platinum (Pt) on all electrodes had a CNT coating applied to the electrodes on half of the array. This Pt/Pt-CNT MEA was implanted into feline motor cortex for >1 year. Recordings of action potentials and 1 kHz impedance measurements were made on all electrodes to evaluate device functionality. Additionally, electromyogram (EMG) responses were evoked using micro-stimulation via the MEA to measure device performance. These metrics were compared between Pt and Pt- CNT electrodes. There was no significant difference in the data acquisition or micro-stimulation performance of Pt and the Pt- CNT electrodes. However, impedances were lower on the Pt- CNT electrodes. These results demonstrate the functionality of CNT coatings during chronic in vivo implantation. The lower impedances suggest that for microstimulation applications CNT coatings may impart enhanced interface properties.

关键词： action functionality CNT

来源：评论

学校读者我要写书评

暂无评论

The United States - Brazil engineering exchange program. Lessons learned

The United States - Brazil engineering exchange program: Les...

引用

118th ASEE Annual Conference and Exposition

作者： Oliveira, Aurenice Menezes Lima Jr., Ivan T. Electrical Engineering Technology Program Michigan Technological University Houghton MI United States Department of Electrical and Computer Engineering North Dakota State University United States

Nowadays, engineering graduates are required to work in an increasingly globalized world, where most large engineering projects currently require multi-national teams of multidisciplinary professionals to work together and, therefore, a better understanding of the global economy, communication skills, cultural awareness, and interpersonal skills are critical to engineers. In this context, universities around the world are increasingly moving to establish international partnerships in their educational and research program.. One of the main purposes of international program. is to provide students value-added technical and cultural experiences. Study abroad program. are recognized as high-impact educational experiences. However, engineering students typically do not have the same variety of offerings of international program.as students of other disciplines have, such as humanities or social science students. In this paper, the authors provide an overview of the critical aspects of developing a consortium among two universities in the U.S. and two Brazilian universities with the goal of establishing a self-sustainable student exchange program.in undergraduate engineering education, and to increase the participation of U.S. students in international experiences. The activities in this program.include the establishment of an agreement betweenthe institutions, the implementation of a course transfer process, and the development of aprocedure for foreign language training and cultural preparation. In addition, we also discuss thekey lessons learned over the first three years of the program. Our program.is under the auspices of the U.S. department of Education's Fund for theImprovement of Postsecondary Education (FIPSE) on the U.S. side, and under the auspices ofthe Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior (CAPES) of the BrazilianMinistry of Education, on the Brazilian side. © 2011 American Society for engineering Education.

关键词： Students

来源：评论

学校读者我要写书评

暂无评论

Spatio-temporal measurement and model for number of occupied channels

Spatio-temporal measurement and model for number of occupied...

引用

2011 18th International Conference on Telecommunications, ICT 2011

作者： Qaraqe, Khalid A. Rahimian, Nariman Celebi, Hasari Georghiades, Costas N. Electrical and Computer Engineering Program Texas AandM University at Qatar Education City Doha Qatar Department of Electrical and Computer Engineering Texas AandM University College Station TX 77843 United States

ISBN: (纸本)9781457700248

Cognitive Radio (CR) systems are a promising solution to the spectrum scarcity problem. However, accurate modeling of spectrum utilization is essential to obtain a better quantitative understanding of important concepts of CR systems. Compact mathematical formulations that describe the realistic spectrum usage would improve the recent theoretical work to a large extent. The data generated from such models would also increase the quality of the simulation based research in the aspect of realism. Besides, in practice, measurement campaigns would prefer if they could characterize results with a few well known parameters instead of exchanging large amount of data. Therefore, in this paper we try to come up with a mathematical model for the spectrum usage by estimating the Probability Mass Function (PMF) of the number of occupied channels. Note that this also gives an insight regarding the spectrum availability. To do this, the data collected from a spectrum occupancy measurement campaign conducted in the State of Qatar is used. The measurements are performed over three consecutive days considering 700-3000 MHz frequency band at four different locations concurrently. We show that after applying the Chi square test, the Log-Normal distribution fits the best among other candidates to the empirical PMF independent of location and the threshold used to define a channel as occupied. © 2011 IEEE.

关键词： Cognitive radio

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：