检索结果-内蒙古大学图书馆

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

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

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

Investigation of single-wall carbon nanotubes at THz antenna

Investigation of single-wall carbon nanotubes at THz antenna

引用

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：

来源：评论

学校读者我要写书评

暂无评论

Review - coating methods of carbon nanotubes and their potential applications

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

Emc measurement in a reverberation chamber

Emc measurement in a reverberation chamber

引用

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

来源：评论

学校读者我要写书评

暂无评论

Metal artefact correction algorithm based-on DSAT technique for CT images

Metal artefact correction algorithm based-on DSAT technique ...

引用

IEEE EMBS Conference on Biomedical engineering and Sciences (IECBES)

作者： N.D. Osman M.S. Salikin M.I. Saripan M.Z.A. Aziz N.M. Daud Radiological and Oncological Cluster Universiti Sains Malaysia Penang Malaysia Medical Imaging Department Universiti Teknologi MARA Puncak Alam Malaysia Department of Computer and Communication System Engineering Universiti Putra Malaysia Serdang Malaysia Radiology Department Hospital Universiti Sains Malaysia Kubang Kerian Malaysia

This paper presents a correction algorithm for metal artefacts in CT images using a novel technique known as dual-step adaptive thresholding (DSAT). The proposed artefact correction algorithm was applied to selected artefactual phantom and clinical CT images. The missing projection data due to metal is detected and extracted by double-thresholding technique. The DSAT-based algorithm allows significant reduction of the artefact and preserves most of the anatomical structures in the corrected CT images.

关键词： Metals Computed tomography Imaging phantoms Image segmentation Image reconstruction Phantoms Interpolation

来源：评论

学校读者我要写书评

暂无评论

Stepping experiment analysis of a biaxial piezoelectric actuated stage

引用

2013 International Conference on Advances in Materials Science and Manufacturing Technology, AMSMT 2013

作者： Mou, Shann Chyi Zhuang, Yu Ren Department of Mechanical Engineering Chien Hsin University of Science and Technology Taiwan Institute of Computer Communication and System Engineering Ching Yun University Taiwan

ISBN: (纸本)9783037857984

In this research, our research team used the self-designed piezoelectric actuator to achieve the micro/nanometer level precise positioning biaxial piezoelectric actuated stage through the redesign of stage mechanism. A novel piezoelectric actuator structure - 4-9-9-14 piezoelectric actuator is constructed, and it is made of piezoelectric buzzer to drive the stage. The movement of the piezoelectric actuated stage is read and analyzed by means of NI PCI-6115 data acquisition card and Lab- VIEW software operating in conjunction with a linear encoder. The new consideration of tuning time Ton is used to place of traditional method of changing the magnitude of driving voltage to control the stepping distance of the stage. Under a constant driving voltage, the displacement of the stage increases with time Ton, and the displacement of the stage decreases with time Ton. The aforesaid phenomenon occurs to leftward or rightward movement of the upper stage and forward or backward movement of the lower stage. Given a constant time Ton, the displacement of the stage in motion decreases with the driving voltage, and the displacement of the stage in motion increases with the driving voltage. © (2013) Trans Tech Publications, Switzerland.

关键词： Piezoelectric actuators

来源：评论

学校读者我要写书评

暂无评论

Implementation of radar map using gps in vehicular networks

Smart Innovation, Systems and Technologies

引用

Smart Innovation, systems and Technologies 2013年 20卷 663-672页

作者： Kuo, Chun-I Wang, Po-Ching Lin, Chih-Hsun Shieh, Ce-Kuen Tsai, Ming-Fong Institute of Computer and Communication Engineering Department of Electrical Engineering Nation Cheng Kung University Taiwan ICT Design and Validation for Vehicles Department Div. for Telematics and Vehicular Control System Information and Communications Research Laboratories Industrial Technology Research Institute Hsinchu Taiwan

ISBN: (纸本)9783642354519

In the highway environment, many applications require localization. It is common to use the Global Positioning system (GPS) to find the current position, but GPS is easily influenced by the external environment and has many internal errors. Dead Reckoning (DR) is a common method for correcting the GPS position. However, the related applications do not have a notice system that can show the number of and distances to neighboring vehicles. In this paper, we design a map application on the Android operating system for vehicular networks. In this map application, the road map would be shown on a monitor, and the neighboring vehicles could also be drawn on this map. Users can easily understand the road conditions. Moreover, the application can exchange traffic information with other vehicles, and the map can also show the vehicles which are out of range. Furthermore, the application can show the time to collision between two vehicles. The experimental results will show the adjustment of position corrected by DR on Google Map, and the radar map on the Android operating system. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Android (operating system)

来源：评论

学校读者我要写书评

暂无评论

Multi-objective parametric analysis of pem fuel cell performance for modified flow field based on Taguchi method and PCA

引用

ICIC Express Letters 2013年第5期7卷 1649-1656页

作者： Ku, Hui-Wen Chang, Chi-Yuan Hsu, Chao-Hsing Department of System and Naval Mechatronic Engineering National Cheng Kung University No. 1 Ta-Hsueh Road Tainan 701 Taiwan Department of Computer and Communication Engineering Chienkuo Technology University No. 1 Chiehshou North Road Changhua City 500 Taiwan

This paper is to perform an experimental and numerical study on the various arrangements of cuboids transversely installed in the side of field plates and then to investigate how the flow characteristics and the heat and mass transfer affect the performance of PEM fuel cell. Then, for the best arrangement of the cuboids in the channel, the Taguchi method and PCA for the multi-objective parametric optimization is then used in the experiment to determine the optimal combination of five primary operating parameters for maximum electrical power and minimum pressure drops. The results show that the electrical power is more for multi-objectives than for single-objective by 30%, average RPQL more for multi-objectives than for single-objective by 51.28%, but the pressure drops less for multi-objectives than for single-objective by 275%. © 2013 ISSN 1881-803X.

关键词： Taguchi methods

来源：评论

学校读者我要写书评

暂无评论

An analysis of the radar backscatter from oil-covered sea surfaces using moment method and Monte-Carlo simulation: preliminary results

引用

Acta Oceanologica Sinica 2013年第1期32卷 59-67页

作者： YANG Chan-Su PARK Seong-Min OH Yisok OUCHI Kazuo Korea Ocean Satellite Center Korea Institute of Ocean Science & Technology (KIOST) Marine Environmental System Science University of Science and Technology ISR R&D Laboratory LIG Nex1 Company Department of Electronics Information and Communication Engineering Hongik University Department of Computer Science School of Electrical and Computer Engineering National Defense Academy

An analysis of the radar backscattering from the ocean surface covered by oil spill is presented using a mi- crowave scattering model and Monte-Carlo simulation. In the analysis, a one-dimensional rough sea sur- face is numerically generated with an ocean waveheight spectrum for a given wind velocity. A two-layered medium is then generated by adding a thin oil layer on the simulated rough sea surface. The electric fields backscattered from the sea surface with two-layered medium are computed with the method of moments （MoM）, and the backscattering coefficients are statistically obtained with N independent samples for each oil-spilled surface using the Monte-Carlo technique for various conditions of surface roughness, oil-layer thickness, frequency, polarization and incidence angle. The numerical simulation results are compared with theoretical models for clean sea surfaces and SAR images of an off-spilled sea surface caused by the Hebei （Hebei province, China） Spirit oil tanker in 2007. Further, conditions for better oil spill extraction are sought by the numerical simulation on the effects of wind speed and oil-layer thickness at different inci- dence angles on the backscattering coefficients.

关键词： method of moments Monte-Carlo technique oil spills backscattering coefficient

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：