检索结果-内蒙古大学图书馆

IEEE International Smart Cities Conference (ISC2)

作者： Alexandros Angelopoulos Damianos Gavalas Charalampos Konstantopoulos Damianos Kypriadis Grammati Pantziou School of Electrical & Computer Engineering Computer Technology Institute & Press “Diophantus” Patras Greece Dept. of Cultural Technology and Communication Institute & Press “Diophantus” Patras Greece Dept. of Informatics University of Piraeus Greece Dept. of Informatics & Telecommunications Institute & Press “Diophantus” Patras Greece Dept. of Informatics Computer Technology Institute & Press “Diophantus” Patras Greece

ISBN: (纸本)9781509018475

The major operational problem in one-way vehicle sharing systems is the vehicle stock imbalance problem. In this paper, we address this problem by proposing a new approach for dynamically allocating vehicles to users based on “incentivization” schemes which use reservations to coordinate supply-and-demand mismatches and price incentives for rewarding users, if they accept to pick up their vehicle from an oversupplied station and/or to drop off it to an under-supplied station. The system incentivizes users based on the priorities of vehicle relocations from station to station, taking into account the fluctuating demand for vehicles and parking places at different stations over time. We present two different schemes for incentivizing users to act in favour of the system. Both schemes consider budget constraints and are truthful and budget-feasible. We extensively evaluated our approach through simulations and observed significant improvements in the number of completed trips and system revenue.

关键词： Vehicles computers Resource management Presses informatics Legged locomotion Pricing

来源：评论

学校读者我要写书评

暂无评论

Construction of 3D FDTD Schemes with Frequency-Dependent Operator Coefficients

Construction of 3D FDTD Schemes with Frequency-Dependent Ope...

引用

European Conference on Antennas and Propagation

作者： Theodoros Zygiridis Nikolaos Kantartzis Christos Antonopoulos Theodoros Tsiboukis Dept. of Informatics & Telecommunications Engineering Univ. of Western Macedonia Kozani Greece Dept.of Electrical & Computer Engineering Aristotle University of Thessaloniki Thessaloniki Greece

ISBN: (纸本)9781509022342

Aiming at the minimization of numerical dispersion effects in finite-difference time-domain (FDTD) simulations, we investigate the potential of introducing frequency-dependent coefficients in the approximations of differential operators. The proposed methodology exploits some previous results on optimized finite-differences, but initially avoids the necessity for selecting a specific optimization point. Herein, the operators' coefficient formulae are approximated by a low-order polynomial, which is transformed into a finite-difference counterpart using the Helmholtz equation. This modifies the initial spatial stencil and improves performance over all frequencies, which can be further controlled with the least-squares method, leading to various new FDTD schemes of augmented reliability.

关键词： Discretization error finite-difference timedomain (FDTD) methods numerical dispersion spatial operators

来源：评论

学校读者我要写书评

暂无评论

Human Action Recognition Based on Action Forests Model Using Kinect Camera

Human Action Recognition Based on Action Forests Model Using...

引用

International Conference on Advanced Information Networking and Applications Workshops (AINAW)

作者： Chi-Hung Chuan Ying-Nong Chen Kuo-Chin Fan Dept. of Applied Informatics FoGuang University Yilan Taiwan Dept. of Computer Science & Information Engineering National Central University Taiwan

ISBN: (纸本)9781509024629

Human action recognition is one of the most important issues in computer vision. In this paper, the main idea is to design a general approach to recognize the human behavior. This approach is based on a pre-collected action database, which extracted by the depth images and forms the sequences of skeletons, and trained by the proposed Action Forests (AF) model. AF extends the random forest algorithm by using different decision functions to fit the skeletal features in 3D space. The system achieves the real-time classification result without the limitation of background and camera position. In the experiments, we collected several human behavior with single-character actions and two-character interactions to train the AF model. The skeleton features were retrieved from the depth sensor Kinect. We investigated the effect of several training parameters in AF. In conclusion, AF can learn the skeletal features efficiently and runs at 30 frames per second on action classification with high accuracy.

关键词： Skeleton Vegetation Training Feature extraction Shoulder Cameras Databases

来源：评论

学校读者我要写书评

暂无评论

Timing error mitigation in microprocessor cores

Timing error mitigation in microprocessor cores

引用

IEEE International Conference on Electronics, Circuits and Systems (ICECS)

作者： Stefanos Valadimas Angela Arapoyanni Yiorgos Tsiatouhas Dept. of Informatics and Telecommunications National and Kapodistrian University of Athens Athens Greece Dept. of Computer Science and Engineering University of loannina loannina Greece

ISBN: (纸本)9781509061143

Timing errors in the memory elements of a design are of increasing importance in nanometer technology microprocessor cores. In this work, we present a flip-flop oriented timing error detection and correction technique. It exploits a transition detector at the input of the flip-flop for error detection along with an asynchronous local error correction scheme to provide timing error tolerance. To validate the proposed approach, it has been applied in the design of a 32-bit MIPS microprocessor core which was fabricated in a 65nm CMOS technology.

关键词： Logic gates Latches Delays Pipelines Registers Microprocessors

来源：评论

学校读者我要写书评

暂无评论

A Density Based k-Means Initialization Scheme 15

A Density Based k-Means Initialization Scheme

引用

16th International Conference on engineering Applications of Neural Networks, EANN 2015

作者： Gourgaris, Panagiotis Makris, Christos Dept. of Computer Engineering and Informatics University of Patras Greece

ISBN: (纸本)9781450331876

In this paper we present the results from some versions of a new initialization scheme for the k-Means algorithm. k- Means is probably the most fundamental clustering algorithm, with application in lots of _elds, such as Signal Processing, Image Colour Segmentation as well as Web data management. The initialization process of the algorithm is of great interest, raising two big challenges. The _rst one, is to _nd out what is k, the number of clusters. The second one, is to determine which are the initial k seeds. We here mainly focus on the later. Our approach is heuristic hence profound mathematical arguments are not being presented. We are based mainly on criteria like density, Euclidean distance and the Mardia's multivariate kurtosis statistic. In order to test the quality of our results, a few cluster validity measures, other than the commonly used Sum Squared Error( SSE) are applied, which in our belief are suitable to be used for evaluation purposes © 2015 ACM.

关键词： Clustering algorithms

来源：评论

学校读者我要写书评

暂无评论

Regularized ICI Cancellation in V2V Communications 15

Regularized ICI Cancellation in V2V Communications

引用

16th International Conference on engineering Applications of Neural Networks, EANN 2015

作者： Vlachos, E. Mavrokefalidis, C. Ampeliotis, D. Berberidis, K. Computer Engineering and Informatics Dept. University of Patras Greece

ISBN: (纸本)9781450331876

In this work, we consider a V2V commnunication system operating over high relative speeds. In this scenario, the wireless channel is characterized by double selectivity, which results into intercarrier interference (ICI) at the receiver. To mitigate this effect, several equalization schemes have been proposed, which usually adopt a banded approximation of the frequency domain matrix, in order to reduce the complexity cost. However, these approximations also decrease significantly the performance of the equalizer. To recover this performance loss, we propose a regularized estimation framework for ICI cancellation. The performance superiority of the proposed method against existing ones is verified through extensive simulations which were performed in accordance with the IEEE 802.11p standard. It must be stressed that this improved performance is achieved without increasing the required computational complexity. © 2015 ACM.

关键词： Orthogonal frequency division multiplexing

来源：评论

学校读者我要写书评

暂无评论

Human Activity Recognition using depth body part histograms and Hidden Markov Models

Human Activity Recognition using depth body part histograms ...

引用

International Conference on Innovations in Science, engineering and Technology (ICISET)

作者： Md. Zia Uddin Jim Torresen Taskeed Jabid Department of Computer Education Sungkyunkwan University Seoul Republic of Korea Dept. of Informatics University of Oslo Oslo Norway Dept. of Computer Science and Engineering Sogang University Seoul Republic of Korea

ISBN: (纸本)9781509061235

This paper proposes a novel approach for human activity recognition based on body part histograms and Hidden Markov Models. From a depth video frame, body parts are segmented first using a trained random forest. Then, a histogram for each body part is combined to represent histogram features for a depth image. The depth video activity features are then applied on hidden Markov models for training and recognition. The proposed method was superior when compared with other conventional approaches.

关键词： Hidden Markov models Shape Histograms Legged locomotion Image segmentation Activity recognition Training

来源：评论

学校读者我要写书评

暂无评论

Design of Efficient 1's Complement Modified Booth Multiplier

Design of Efficient 1's Complement Modified Booth Multiplier

引用

Euromicro Symposium on Digital System Design

作者： Kiamal Pekmestzi Constaninos Efstathiou Dept. of Electrical and Computer Engineering National Technical University of Athens Athens Greece Dept. of Informatics Technological Educational Institute of Athens Athens Greece

The 2's complement representation is widely adopted, since compared to the other signed number systems has the advantage of simpler addition and single representation of zero. Sing-magnitude representation is used in digital signal processors for the representation of digital signals for low-power purposes. The 1's complement representation compared to the 2's complement one has the advantages of the simpler conversion to and from the sign-magnitude representation, simpler negation and that truncation of negative numbers is equivalent to that of the sign-magnitude representation. Therefore, the design of efficient arithmetic units for this system should be examined. In this work 1's complement modified Booth multipliers with complexity similar to that of the 2's complement ones are proposed.

关键词： Digital signal processing Adders Algorithm design and analysis Generators Complexity theory Encoding Switches

来源：评论

学校读者我要写书评

暂无评论

Magnetotransport properties of nanogranular Bi and Co(c=0.2)Bi(1-c) thin films

引用

Journal of Physics: Conference Series 2017年第1期903卷

作者： P Athanasopoulos Th Speliotis C Christides Dept. of Computer Engineering & Informatics University of Patras 26504 Rion Patras Greece. Institute of Nanoscience and Nanotechnology NCSR 'Demokritos' 15310 Athens Greece

A nanogranular thin film structure with concentration Co(c=0.2)Bi(1-c), and thickness 25 nm, exhibits: (i) a progressive crossing of Hall coefficient RH(B) curves from negative at lower fields to positive sign at higher fields between 5K and 200K, and (ii) the perpendicular magnetoresistance (PMR), ρ⊥(B,T)/ρ⊥(B=0,T), curves are separated, exhibiting two different components above and below |B|≈2T. The low field PMR component can be described by the two band-model of bulk Bi. The effect of the low-field PMR component increases from 5K up to 300K by: Δρ⊥(ΔB=2T,300K)≈3Δρ⊥(ΔB=2T,5K), following the same trend with RH(B,T) curves. Below 100K and for |B|≥2T the second component in PMR curves can be simulated by a power law: ρ i (B)=bBκ , with an exponent κ: 1.3 ≤ κ < 2, which can be understood as a result of the two band-model equation. However, above 100K and for |B|≥2T this second PMR component becomes linear in B: ρ i (B)=bB, up to 300K. This behavior coincides with the temperature and field regions where the RH(B) curves reverse the sign of Hall coefficient. Such a linear MR with B can be related to an edge-resistance: Redge ~ B ⊥, providing evidence for an edge conduction channel in grain boundaries of Co and Bi that competes the bulk component of bulk Bi, over the temperature and field regions.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Smart and simple method for encrypting and decrypting image based on crossover of GA

Smart and simple method for encrypting and decrypting image ...

引用

International Conference on Information Communication and Embedded Systems (ICICES)

作者： Gamil R.S. Qaid Alo Abdo M. Al-kubati Dept. of Computer Engineering Hodeidah University Hodeidah City - Yeman Dept. of Informatics Systems Community College Bisha University Bisha City-KSA

ISBN: (纸本)9781509025534

The current age is called the age of information technology. The security of transmitting and storing this information are facing a huge challenge. Traditional and classical methods are not suitabel to protect this information, especially when the type of this information is a part of multimedia such as image, audio and video. This type of information needs the high level of security. For that purpose, many researchers designed novel and smart techniques and methods. In this paper suggests a new algorithm to investiage the quality of encryption based on genetic algorithm to find out an optimization solution for security, robustness, quality and speed of encryption algorithm. In this method, the genetic algorithm has been incorportaed within encryption algorithm to find a optimization solution minimize possible time and maximize the performance algorithm.

关键词： encryption algorithm Security level information technology Gallium Genetic Crossing Over Genetic Algorithm (GA) Imagery (Psychotherapy) Image images cryptography MULTI-MEDIA SYSTEM

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：