检索结果-内蒙古大学图书馆

作者： Chiang, Cheng-Yen Chen, Kun-Shan Chu, Chih-Yuan Department of Computer Science and Information Engineering National Central University Taiwan Communication System Research Center National Central University Taiwan G-AVE Technology Ltd. Taiwan

The new polarization decomposition method of four components with total power algorithm provides more information to recognize the targets' mechanism. The region of basic RGB color space that was used to represent the chroma for fully polarization data is not cover the human perceptual system completely. In this paper, we introduced a new color assignment framework for fully polarization data using uniform perceptual color space called Lab color space which preserves not only color tone by four scattering mechanism, but also the targets' structure derived by total power significantly. In our framework, the explainability and portability using standard embedded color profiles technology was considered. The effective interpretability by chromatic contrast increasing, structure enhancement and flexibility in data trimming was presented with real space borne data. © VDE VERLAG GMBH · Berlin · Offenbach, Germany.

关键词： Polarization

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A review of webapp authoring tools for e-learning

A review of webapp authoring tools for e-learning

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IEEE Global engineering Education Conference

作者： M. Latorre A. Robles-Gomez L. Rodriguez P. Orduna E. San Cristobal A. C. Caminero Ll. Tobarra I. Lequerica S. Ros R. Hernandez M. Castro D. Lopez-de-Ipina J. Garcia-Zubia Electrical and Computer Engineering Department UNED Control and Communication System Department UNED DeustoTech - Deusto Institute of Technology University of Deusto Faculty of Engineering University of Deusto

ISBN: (纸本)9781479931927

The lack of tracking and storing capabilities for the results of web-based learning activities is an issue that remains unsolved. Transitions or interactions defined by teachers through a set of conditions still require programming skills that stay far beyond the desired final results. In addition to this, authoring tools should bepowerful enough to let lecturers generate contents which are high-quality, interactive, and tuned to each student's cognitive preferences and progress. Availability and processing capabilities, or motivation, relevance, etc., must also be aspects to address in this context. For these reasons, this paper aims to review the existing web application authoring toolkits focusing on distance education. In particular, we analize their main features, requirements and issues, as well as the most promising areas for future improvemenst in this field.

关键词： Webapps Authoring tools E-learning Distance education Customization

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Low-cost remote laboratories for renewable energy in distance education

Low-cost remote laboratories for renewable energy in distanc...

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International Conference on Remote engineering and Virtual Instrumentation (REV)

作者： Llanos Tobarra Salvador Ros Roberto Hernández Rafael Pastor Antonio Robles-Gómez Agustín C. Cammero Manuel Castro Control and Communication System Department Spanish University for Distance Education Madrid Spain Control and Communication System Department UNED - Spanish University for Distance Education Madrid Spain Electrical and Computer Engineering Department Spanish University for Distance Education Madrid Spain

Remote laboratories are nowadays essential in distance learning, as our case is, since students are not able to use face-to-face traditional laboratories. These remote laboratories can be employed by teacher within virtual classrooms, so that students can carry out their on-line experiments from anywhere and at anytime. The main drawback of these kinds of laboratories is their cost; this is more noticeable in the field of renewable energy. For this reason, this work proposes the use of low-cost remote laboratories, aimed at the study of solar and wind renewable energy. The described remote laboratory is based on using the popular robotic kit, named Lego Mindstorms NXT v2.0. robotic kit, which allows teachers to have flexibility when designing the laboratory and adapt it to the educational necessities of a course. The programming of these laboratories has been performed by using RESTful web services with Lab VIEW, a novel approach that enables users the creation of multiplatform laboratories.

关键词： Barium Hafnium Conferences Instruments DH-HEMTs

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Development of an embedded smart home management scheme

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International Journal of Smart Home 2013年第2期7卷 15-26页

作者： Perumal, Thinagaran Sulaiman, Nasir Md Sharif, Khaironi Yatim Ramli, Abd Rahman Leong, Chui Yew Department of Computer Science Faculty of Computer Science and Information Technology UPM Serdang Malaysia Department of Computer and Communication System Engineering UPM Serdang Malaysia

This paper describes the development of an embedded smart home management scheme over the Ethernet network. The platform of the smart home management system is built using bespoke embedded system design. An embedded control module developed by exploiting the Web Services mechanism, consist of 15 monitoring channels based on XML SOAP standards. Each channel is integrated to dedicated smart home management scheme and performs bi-directional real-time control. In the event of server unavailability, a mobile based communication module using GSM has been deployed as an alternate management mechanism. The proposed embedded-enabled solution offers bi-directional real-time management as well as optimized performance for smart home environment.

关键词： Interoperability

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Performance analysis of stopping turbo decoder iteration criteria

Performance analysis of stopping turbo decoder iteration cri...

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International Colloquium on Signal Processing & Its Applications, CSPA

作者： Roslina Mohamad Harlisya Harun Makhfudzah Mokhtar Wan Azizun Wan Adnan Kaharudin Dimyati Aerospace Engineering Department Universiti Putra Malaysia Serdang Selangor Malaysia Computer and Communication System Engineering Department Universiti Putra Malaysia Serdang Selangor Malaysia Electrical and Electronics Engineering Department Universiti Pertahanan Nasional Malaysia Kuala Lumpur Malaysia

The invention of turbo codes has attracted many researchers to explore various fields regarding turbo codes since it provides better error rate performance compared to the existing codes. Good error rate performance gives a penalty to the complexity of the codes. It includes the complexity of decoding algorithm and iterative decoding. This paper reviews the history of turbo codes and its structures. This paper also discusses the turbo decoding stopping criteria algorithm and analyses the performance of fixed and cross-entropy (CE) based stopping criteria. From the results, both criteria fail to terminate early in low SNR. However, CE-based stopping criteria outperform the fixed stopping criterion at high SNR and able to save more iteration and delay. This leads to an energy saving preservation while maintaining the performance of turbo codes.

关键词： Decoding Turbo codes Bit error rate Iterative decoding Signal to noise ratio Thyristors Signal processing algorithms

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Global evolution of an analyzer angle on the Faraday anomalous dispersion optical filter at 1529 nm

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Chinese Science Bulletin 2013年第36期58卷 4582-4587页

作者： TAO ZhiMing WANG YanFei HONG YeLong WANG DongYing ZHUANG Wei CHEN JingBiao State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum Electronics School of ElectronicsEngineering and Computer Science Peking University Department of Physics Bijie University

In order to realize laser frequency stabilization,the global evolution of an analyzer angle on the electrodeless-discharge-vaporlamp-based excited-state Faraday anomalous dispersion optical filter(LESFADOF)with a single transmission peak operating on the Rb1529 nm(5P3/2-4D5/2)is *** find that the transmission of the line center peak at 80°arrives at 14%in a 3 cm length lamp contained natural Rb mixed with 2 torr Xe buffer gas operating at 250°C with 176 MHz radio *** it is used to realize laser frequency stabilization,the LESFADOF at near 80°is *** a single transmission peak or double transmission peaks depend on the rf voltage when two polarizers are crossed.

关键词：法拉第反常色散光学滤波器演进激光稳频无电极放电无线电频率频率稳定激发态

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Distribution of populations in excited states of electrodeless discharge lamp of Rb atoms

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Chinese Science Bulletin 2013年第16期58卷 1876-1881页

作者： TAO ZhiMing WANG YanFei HONG YeLong WANG DongYing ZHANG ShengNan ZHUANG Wei CHEN JingBiao State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum Electronics School of Electronics Engineering & Computer Science Peking University Department of Physics Bijie University

The intensity of fluorescence spectral lines of Rb atoms in the region of 350-1110nm is measured in eletrodeless discharge lamp. The population ratio between the excited states is calculated according to the spontaneous transition probabilities with rate equations. At the same time, the population density of energy level is also obtained. The results provide the potential applications of electrodeless discharge lamp in atomic filter and optical frequency reference at higher excited states without a pumping laser.

关键词：原子激发态无极灯铷原子种群分布人口密度无极放电灯原子滤光器概率计算

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Investigation of single-wall carbon nanotubes at THz antenna

Investigation of single-wall carbon nanotubes at THz antenna

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International Conference on Electronic Design (ICED)

作者： Yaseen N. Jurn M. F. Malek Wei-Wen Liu Haider K. Hoomod School of Computer and Communication Engineering Universiti Malaysia Perlis (UniMap) Perlis Malaysia School of Materials and Mineral Resources Engineering Universiti Malaysia Perlis (UniMap) Perlis Malaysia School of Electrical System Engineering Universiti Malaysia Perlis (UniMap) Perlis Malaysia Department of Computer Science\College of Education University of Mustansiriyah Baghdad Iraq

This work investigates the fundamental properties of armchair single-wall carbon nanotubes (armchair-SWCNTs) dipole antenna at THz band using Drude method. Due to their metallic conducting properties, the armchair SWCNTs will be utilized in this work. The radiation pattern, s 11 parameters, phase velocity and antenna directivity are presented for this antenna. The results demonstrate that armchair-SWCNTs dipole antenna with a radius of 2.71 nm takes on the resonant frequency properties from 1THz to 18THz, corresponding antenna lengths 1500nm to 50nm. All results in this work can be used for design of CNTs antenna (armchair-SWCNTs antenna) in wide THz band. The evaluation of the antenna's performance was done using computer Simulation Technology (Microwave studio) CST (MWS), which exhibited and analyzed the key parameters of the antenna.

关键词：

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Review - coating methods of carbon nanotubes and their potential applications

Review - coating methods of carbon nanotubes and their poten...

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IEEE International Conference on Control system, Computing and engineering (ICCSCE)

作者： Yaseen Naser Jurn M. F. Malek Wei-Wen Liu Haider K. Hoomod Amal Abbas Kadhim School of Computer and Communication Engineering Universiti Malaysia Perlis (UniMap)/Perlis Malaysia School of Electrical System Engineering Universiti Malaysia Perlis (UniMap)/Perlis Malaysia School of Materials and Mineral Resources Engineering Universiti Malaysia Perlis (UniMap)/Perlis Malaysia Department of Computer Science\College of Education University of Mustansiriyah/Baghdad Iraq

The electrical, mechanical and physical properties of carbon nanotubes have been applied in different fields. The fabrication new composite materials of carbon nanotubes by various methods illustrates how new avenues are used in many areas of science and technology. The coating method of carbon nanotubes is one of the fabrication techniques. This review therefore, aims to present a general lid on different kinds of coating methods employed to fabricate new composite materials of carbon nanotubes. Their potential applications are also addressed. The key conditions of preferable coating methods that commensurate with CNT antennas applications are then proposed in this paper.

关键词： Coatings Composite materials Nanocomposites Temperature Mechanical factors Carbon nanotubes

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Emc measurement in a reverberation chamber

Emc measurement in a reverberation chamber

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2013 Asian Pacific Conference on Mechatronics and Control engineering, APCMCE 2013

作者： Rhee, Eugene Lee, Ji Hoon Department of Computer System Engineering Sangmyung University Korea Republic of Department of Information and Communication Engineering Sangmyung University Korea Republic of

ISBN: (纸本)9783037857373

A reverberation chamber, which is a test facility for various electromagnetic compatibility tests, uses a stirrer to generate a uniform electric field inside it. However, a stirrer is a big unit and has difficulties in maintenance. This paper adopted an idea of a diffuser from acoustics to overcome the problems of a stirrer and presents a substitution effect of a diffuser for a stirrer. To validate the substitution effect of a diffuser, a diffuser and a reverberation chamber for 3.0-5.0 GHz band are designed and fabricated. And the real measurement for analyzing the electric field uniformity in a reverberation chamber is done. The measurement results show that the reverberation chamber with a diffuser satisfies the international standard requirement. © (2013) Trans Tech Publications, Switzerland.

关键词： Electromagnetic compatibility

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