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： Sinisa Colic Rob Wither James H. Eubanks Liang Zhang Berj L. Bardakjian Department of Electrical and Computer Engineering University of Toronto Department of Physiology University of Toronto Division of Genetics and Development Department of Surgery and University of Toronto Epilepsy Research Program University of Toronto Division of Fundamental Neurology Department of Medicine and University of Toronto Epilepsy Research Program University of Toronto Department of Electrical and Computer Engineering and Institute of Biomaterials and Biomedical Engineering University of Toronto

ISBN: (纸本)9781424441211

Rett syndrome is a neurodevelopmental disorder of the brain that affects females more often than males. Its cause is linked to the mutations within the gene encoding methyl CpG-binding protein 2 (MeCP2). Presently, there is little information regarding how the loss of MeCP2 affects brain activity. It has been documented that during awake but immobile state, the MeCP2 deficient mice exhibit spontaneous, rhythmic electroencephalogram (EEG) seizure-like events (SLEs) in the range of 6-9 Hz. In this study, we analyze the cortical EEG activity in female MeCP2-deficient mice over 24 hour recordings. Characterizing the SLE and inter-SLE durations by fitting to a gamma distribution we show similarity to previous in vivo epilepsy studies. These results suggest that the SLE and inter-SLE dynamics differ. More precisely, the SLE terminations appear to be a result of time-dependent mechanisms, whereas the inter-SLEs are a result of a random process.

关键词： Methyl-CpG-Binding Protein 2 Electroencephalography Systemic Lupus Erythematosus Gamma Distribution Mus Seizures Neurodevelopmental Disorders Stochastic Processes Brain Diseases Rett Syndrome awake Mouse brain activity CXXC1 gene

来源：评论

学校读者我要写书评

暂无评论

Stabilization of hydroxyl-terminated silanes in porous silicon for in-situ DNA synthesis

引用

Physica Status Solidi (C) Current Topics in Solid State Physics 2011年第6期8卷 1851-1855页

作者： Lawrie, Jenifer L. Weiss, Sharon M. Interdisciplinary Graduate Program in Materials Science Vanderbilt University Nashville TN United States Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN United States

Passivation of porous silicon sensors is a critical issue for achieving high sensitivity and selectivity toward biomolecule targets that may be detected in complex physiologic solution. Without appropriate passivation, degradation of the porous silicon matrix inhibits the repeatability of optical measurements and limits applications in complex media. In this work, we present a method for stabilizing TEOS-HBA monolayers in porous silicon. Annealing of the silane at 200°C for 16 hours, followed by a deionized water wash for a minimum of one hour, results in a porous silicon surface that is highly stable in a number of solvents. Annealing improves cross-linking of surface-attached silane molecules for added stability, and hydrolyzing facilitates removal of weakly bound multilayers. This surface treatment procedure is of considerable interest in applications such as DNA synthesis where hydroxyl functionality is critical and a thick silane surface coating is not desired. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Passivation

来源：评论

学校读者我要写书评

暂无评论

Brain-muscle-computer interface using a single surface electromyographic signal: Initial results

Brain-muscle-computer interface using a single surface elect...

引用

International IEEE/EMBS Conference on Neural engineering, CNE

作者： Sanjay S. Joshi Anthony S. Wexler Claudia Perez-Maldonado Scott Vernon Department of Mechanical and AeroSpace Engineering University of California Davis USA University of California Davis Davis CA US Biomedical Engineering Graduate Group University of California Davis USA Electrical & Computer Engineering Graduate Group University of California Davis USA

We review progress towards developing a new human-computer interface that uses only a single sEMG sensor to achieve complex control of external devices. The interface relies on an underlying neuromuscular result, in which we showed that the human neuromuscular system can simultaneously manipulate partial power in two separate frequency bands of a sEMG power spectrum at a single muscle site. Subjects are trained using visual feedback based operant conditioning. The two frequency bands can then be used as two separate control channels to achieve multidimensional control of external objects, using only a single measured sEMG signal. Our first results showed that subjects could hit targets on a computer screen in two-dimensions with a cursor. Cursor manipulation was then paired with a finite-state machine to achieve control of simulated and actual power wheelchairs. Work on brain-muscle-computer interfaces is still in its infancy, and fundamental questions must still be answered in terms of training, usability, and underlying neurophysiological mechanisms. However, our early results show promise that these interfaces may provide a new option to benefit the lives of severely paralyzed persons.

关键词： Muscles Wheelchairs Training computers Humans Testing Band pass filters

来源：评论

学校读者我要写书评

暂无评论

Accelerated oxidation of silicon due to x-ray irradiation

Accelerated oxidation of silicon due to x-ray irradiation

引用

European Conference on Radiation and its Effects on Components and Systems (RADECS)

作者： Shweta Bhandaru En Xia Zhang Daniel M. Fleetwood Robert A. Reed Robert A. Weller Sharon M. Weiss Interdisciplinary Graduate Program in Material Science Vanderbilt University Nashville TN USA Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN USA

Enhanced rates of oxide growth have been observed on silicon when exposed to high-energy x-ray irradiation. This observed effect could potentially be utilized for remote total ionizing dose-sensing applications.

关键词： Silicon Radiation effects Oxidation Atomic measurements Temperature measurement Optical sensors Atomic layer deposition

来源：评论

学校读者我要写书评

暂无评论

An early design estimation approach to synthesize the low-power pre-computation-based content addressable memory

An early design estimation approach to synthesize the low-po...

引用

IEEE Conference on Open Systems (ICOS)

作者： Rueichi Shen Chinhung Peng Feipei Lai Department of Electrical Engineering National Taiwan University Taipei Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei Taiwan

Content addressable memory (CAM) is often used in many applications which require searching in high speed such as network router, translation look-aside buffer (TLB), Huffman decoding, discrete cosine transform or the applications having quick lookup table operation. Due to its operational characteristic of parallel data searching, the power consumption is also exacerbated. In this paper, we propose a methodology for synthesizing a low power pre-computation-based content addressable memory (PB-CAM) effectively. The concept of discrete uniform distribution is adopted in pre-computation block so as to verify the outcomes of power reduction when the adaptive parameter extractors are synthesized in a different manner. With our proposed approach, we are able to estimate the tendency towards power consumption efficiently and determine which type of parameter extractor is superior in power reduction for the specific data. Experiment shows the power consumption of our approach is better by at least 29% compared with original parameter extractors.

关键词： Power demand Data mining Logic gates Conferences computer architecture Open systems Associative memory

来源：评论

学校读者我要写书评

暂无评论

Adaptive Comb Filtering for Motion Artifact Reduction from PPG with a Structure of Adaptive Lattice IIR Notch Filter

Adaptive Comb Filtering for Motion Artifact Reduction from P...

引用

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

作者： Boreom Lee Youngwook Kee Jonghee Han Won Jin Yi Graduate-program of Medical System Engineering (GMSE) Gwangju Institute of Science and Technology (GIST) Department of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Department of Biomedical Engineering Hanyang University Department of Oral and Maxillofacial Radiology Seoul National University School of Dentistry

ISBN: (纸本)9781424441211

Photoplethysmographic (PPG) signal can provide important information about cardiovascular and respiratory conditions of individuals in a hospital or daily life. However, PPG can be distorted by motion artifacts significantly. Therefore, the reduction of the effects of motion artifacts is very important procedure for monitoring cardio-respiratory system by PPG. There have been many adaptive techniques to reduce motion artifacts from PPG signal including normalized least mean squares (NLMS) method, recursive least squares (RLS) filter, and Kalman filter. In the present study, we propose the adaptive comb filter (ACF) for reducing the effects of motion artifacts from PPG signal. ACF with adaptive lattice infinite impulse response (IIR) notch filter (ALNF) successfully reduced the motion artifacts from the quasi-periodic PPG signal.

关键词： SRGN gene Motion artifacts Self tuning Trap Filter Butyl rubber artifact reduction

来源：评论

学校读者我要写书评

暂无评论

SOI TFET $I_{\rm ON}/I_{\rm OFF}$ Enhancement via Back Biasing

引用

IEEE Transactions on Electron Devices 2011年第10期58卷 3283-3285页

作者： Alex Guo Peter Matheu Tsu-Jae King Liu University of California Berkeley CA USA Applied Science & Technology Graduate Program University of California Berkeley CA USA Department of Electrical Engineering and Computer Sciences University of California Berkeley CA USA

The effect of back biasing on the performance of a planar tunnel field-effect transistor (TFET) implemented on a silicon-on-insulator substrate is investigated. It is found that reverse back biasing reduces the subthreshold swing SS and increases the range of drain current over which SS is less than ( k B T / q ) ln (10); hence, it is effective for improving the TFET on/off current ratio for low operating voltages (≤ 0.5 V).

关键词： Logic gates Tunneling Doping Transistors Silicon Photonic band gap Junctions

来源：评论

学校读者我要写书评

暂无评论

Improving node localization in WSN by using obstruction level indicator

Improving node localization in WSN by using obstruction leve...

引用

IEEE International Conference on Systems, Man and Cybernetics

作者： Salvador Jauregui-Ortiz Mario Siller Felix Ramos Edson Escalabrin Electrical Engineering and Computer Science Department Center of Research and Advanced Studies Guadalajara Jalisco Mexico Graduate Program in Computer Science Pontifical Catholic University of Parana Brazil Curitiba Parana Brazil

Wireless sensor networks can be used in habitat monitoring for detecting fire, in disaster for helping rescue teams and in agriculture for sensing humidity. Node localization is essential for some important sensor network applications. Despite the high relative accuracy of some localization algorithms, node localization is still an opened research area, due to the physical phenomena such as attenuation, reflection, diffraction, scattering and so forth. The current developed algorithms have different accuracy when are tested under dissimilar environments. We propose to use Smart Beacon Nodes (SBNs) to infer the Obstruction Level Indicator over an occupied area, then, use this indicator for estimating the distance among nodes. In our experimental simulation, SBNs decrease the node localization error of Triangular Centroid Localization and Weighted Centroid Localization up to 18%.

关键词： Accuracy Wireless sensor networks Estimation Testing Attenuation Databases Radar

来源：评论

学校读者我要写书评

暂无评论

Structure and magnetic properties characterization of electrodeposited Co37Fe63 alloys containing oxygen for magnetic recording applications

Structure and magnetic properties characterization of electr...

引用

作者： Elhalawaty, S. Carpenter, R.W. George, J. Brankovic, S.R. Materials Science and Engineering Graduate Program School for Engineering of Matter Transport and Energy Arizona State University 85287-6106 United States LeRoy Eyring Center for Solid State Science Arizona State University AZ 85287-9506 United States Center for Nanomagnetic Systems University of Houston TX 77204-4005 United States Electrical and Computer Engineering Department University of Houston TX 77204-4005 United States

ISBN: (纸本)9781118029473

Soft and high magnetic moment Co37Fe63 films were electro-deposited with variable additives on Cu/Ti/Si substrates. The correlation between structure and magnetic properties has been investigated. TEM showed the crystal structure of the films to be BCC with a 〈111〉 texture, and a grain size in the range of 10-20 nm. Oxygen in the deposited films has been identified by EDS and EELS using HAADF STEM. SIMS analysis revealed the presence of hydrogen and oxygen in the deposited CoFe films. Electron microscopy results showed that the oxygen was mainly distributed along the grain boundaries in the CoFe film. In regions where oxygen was present in the films, the Fe content was enhanced relative to Co. The magnetic properties of the deposits have been measured by Vibrating Sample Magnetometer (VSM), quantifying the impact of incorporated oxygen in the film on the saturation magnetization and the coercivity.

关键词： Magnetic properties

来源：评论

学校读者我要写书评

暂无评论

Complex-valued functional link network design by orthogonal least squares method for function approximation problems

Complex-valued functional link network design by orthogonal ...

引用

International Joint Conference on Neural Networks (IJCNN)

作者： Md. Faijul Amin Ramasamy Savitha Muhammad Ilias Amin Kazuyuki Murase Department of Systems Design Engineering Graduate School of Engineering University of Fukui Fukui Japan School of Electrical and Electronics Engineering Nanyang Technological University Singapore Department of Computer Science and Engineering United International University Dhaka Bangladesh Research and Education Program for Life Science University of Fukui Fukui Japan

This paper presents a fully complex-valued functional link network (CFLN). The CFLN is a single-layered neural network, which introduces nonlinearity in the input layer using nonlinear functions of the original input variables. In this study, we consider multivariate polynomials as the nonlinear functions. Unlike multilayer neural networks, the CFLN is free from local minima problem, and it offers very fast learning in parameters because of its linear structure. In the complex domain, polynomial based CFLN has an additional advantage of not requiring activation functions, which is a major concern in the complex-valued neural networks. However, it is important to select a smaller subset of polynomial terms (monomials) for faster and better performance, since the number of all possible monomials may be quite large. In this paper, we use the orthogonal least squares method in a constructive fashion (starting from lower degree to higher) for the selection of a parsimonious subset of monomials. Simulation results demonstrate that computing CFLN in purely complex domain is advantageous than in double-dimensional real domain, in terms of number of connection parameters, faster design, and possibly generalization performance. Moreover, our proposed CFLN compares favorably with several other multilayer networks in the complex domain.

关键词： Polynomials Nonhomogeneous media Educational institutions Algorithm design and analysis Function approximation Neural networks Input variables

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：