检索结果-内蒙古大学图书馆

Numerical Simulation of Infrared Photodetectors with Au Gratings by FDFD Method

Numerical Simulation of Infrared Photodetectors with Au Grat...

The 6th International Symposium on Microwave,Antenna,Propagation,and Electromagnetic Compatibility Technologies(MAPE 2015)

作者： Lulu Cheng Zhixiang Huang Jie Xu Xianliang Wu Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University

Quantum-well infrared photodetectors have been studied extensively due to their night vision, astronomy and environmental monitoring research in recent years. However, responsivity and detectivity are relatively low in these photodetectors without the Au gratings. Therefore, the Au grating will be employed on the surface of photodetector with periodic structure due to the principle of spoof plasmon resonance. The new design mainly aims to enhance the absorption in the QW active region based on the Au grating and can be numerically simulated by using finite-difference frequency-domain method. With optimal grating parameters, the absorption can be enhanced by hundreds of times compared with that in the reference structure without grating. The theoretical results provide the realistic organic infrared photodetectors with theoretical basis and technical support.

关键词： Au grating photodetector finite-difference frequency-domain plasmon resonance

来源：评论

学校读者我要写书评

暂无评论

A Novel DGS to Bandpass Filter Design

A Novel DGS to Bandpass Filter Design

引用

2015 2nd International Workshop on Materials Engineering and Computer Sciences(IWMECS 2015)

作者： Hongqing He Minquan Li Yu Zhang Key Laboratory of Intelligent Computing & Signal Processing Ministry of EducationAnhui University

In this paper, a novel symmetrical split-ring resonators defected ground structure(DGS) wideband bandpass filter is proposedThis filter exhibits advantages such as miniaturization, large range of bandwidth and easy fabricationThis paper analyzes the symmetrical split-ring resonators DGS unit and the bandpass filter with three symmetrical split-ring resonators DGS is designedThe simulation and testing show that the bandpass filter with the novel DGS provides insertion loss of 0.9d B, return loss of-12.5d B, and the relative bandwidth achieves 7%.

关键词： bandpass filter defected ground structure miniaturization split-ring resonator

来源：评论

学校读者我要写书评

暂无评论

A Novel Open Slot Wideband Antenna with Enhanced Bandwidth

A Novel Open Slot Wideband Antenna with Enhanced Bandwidth

引用

2015 International Conference on Electrical and Electronics: Techniques and Applications(EETA 2015)

作者： Yuan ZHU You DING Min-quan LI Key Laboratory of Intelligent Computing & Signal Processing Ministry of EducationAnhui University

In this paper, a novel open slot wideband antenna with enhanced bandwidth is presentedMultiple resonances are generated by the rectangular patch and a C-shaped slot etched on the groundFurthermore, a metal cylinder is used in antenna structure which leads to the bandwidth enhancement of the proposed antennaBoth the simulated and measured results show that the proposed antenna can provide a wide impedance bandwidth of 94.1% from 3.13 to 8.7 GHz with 10-dB return lossCompared with the conventional L-slot wideband antenna with an impedance bandwidth of 72.7%, ranging from 3.1 to 7.0GHz, the impedance bandwidth of the proposed antenna is increased by 21.4%Moreover, the impedance bandwidth can be altered by changing the dimension of the metal cylinder's radius within limits.

关键词： Bandwidth enhancement Impedance bandwidth Open slot Wideband antenna

来源：评论

学校读者我要写书评

暂无评论

Dynamic Analysis of Urban Landscape Patterns of Vegetation Coverage Based on Multi-temporal Landsat Dataset

Dynamic Analysis of Urban Landscape Patterns of Vegetation C...

引用

The 9th International Conference on Computer and computing Technologies in Agriculture (CCTA 2015)

作者： Dong Liang Ling Teng Linsheng Huang Xinhua Xie Yan Zuo Jingling Zhao Key Laboratory of Intelligent Computing and Signal Processing Ministry of EducationAnhui University

ISBN: (纸本)9783319483566

Dynamic monitoring of vegetation coverage changes, especially on a relatively large temporal scale, have important practical significance in urban planning and environmental protection. The objective of this study is to dynamically investigate the urban landscape patterns of vegetation coverage based on remote sensing techniques. Multi-temporal Landsat images of 1990,2000 and 2013 were firstly used to produce three vegetation coverage maps of HefeiCity, AnhuiProvince, China with five grades using the NDVI(Normalized Difference Vegetation Index) dimidiate pixel model. Subsequently, a total of eight landscape pattern indictors in FRAGSTATS 4.2 were selected to analyze the dynamic characteristics of area, quantity and density for the study area with different vegetation coverage grades. The results showed that(1) the dominant vegetation coverage of 1990, 2000 and 2013 were the high vegetation coverage, the moderate vegetation coverage and the moderate-to-high vegetation coverage, respectively. The acreage of non-vegetation coverage increased by1.89 %, while the high vegetation coverage decreased by 10.48 % from 1990 to2013;(2) the quantity and density of patches decreased by 33.42 % and33.41 % during 1990–2013. Shannon's diversity index and Shannon's evenness index increased from 0.92 in 1990 to 0.97 in 2000, and then declined to 0.96 in2013;and(3) the contagion index had an upward trend and conversely the aggregation index showed no significant changes, but both of them were close to1 during 1990–2013. In comparison with natural in fluences, the primary driving forces causing the changes were ascribed to human factors including the rapid population growth and fast-growing urban areas.

关键词： Landscape pattern Vegetation coverage Normalized difference vegetation index (NDVI) Landsat Remote sensing Coverage Landsat satellites vegetation remote sensing Landscape Patterns Dynamic analysis urban landscape normalized difference vegetation index

来源：评论

学校读者我要写书评

暂无评论

A Novel Coplanar Waveguide Fed Ultra-Wideband Antenna With Dual Band-notched Characteristics

A Novel Coplanar Waveguide Fed Ultra-Wideband Antenna With D...

引用

2015 3rd International Conference on Machinery,Materials and Information Technology Applications(ICMMITA 2015)

作者： Ya-dong Wei Min-quan Li Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University

A novel ultra-wideband( UWB) antenna is proposed in this paper,which has a band-notched characteristic for the interference between the UWB applications and the IEEE802.11 a wireless local area network(WLAN) and the Wi MAX /C-band with combination of notched structures. The proposed antenna fed by coplanar waveguide( CPW),with modified U-slots and general U-slot in echelon patch which can be used to reject the frequency 5.15 to 5.825 GHz, 3.3 to 3.6GHz,and 3.7 to 4.2GHz. The simulation results show that the antenna has obvious band-notched characteristics in the notched band which can effectively prevent the interference of these narrow-band communication systems, and also has well radiation characteristics in the whole band.

关键词： UWB antenna dual-notched bands coplanar waveguide(CPW) combination of notched structures

来源：评论

学校读者我要写书评

暂无评论

Application of a multi-factor model in the grain yield prediction

引用

Metallurgical and Mining Industry 2015年第8期7卷 468-474页

作者： Chen, Lili Guo, Hongjun Laboratory of Intelligent Information Processing Suzhou University Suzhou Anhui China The Key Laboratory of Intelligent Computing and Signal Processing of MOE Anhui University Hefei Anhui China

A multi-factor model for the grain yield prediction based on the previous data and relevant impacting factors is reported. In this model, the weight coefficient of each individual factor that affected the grain yield historically is analyzed by the variation coefficient method and the conversion degree function in the attribute theory. The effects of various factors on the predicted grain yield are then used as standard vectors and subjected to a similarity-based search in the matrix of historical values. The predicted total grain yield is then determined by multiplying the sown area by the unit grain yield which is obtained by the highest similarity between the historical data and those predicted. Compared to the results obtained by the BP nerve network method, this method is simpler, more flexible, less time-consuming, and more accurate.

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

The ICL-TUM-PASSAU approach for the MediaEval 2015 "affective impact of movies" task

The ICL-TUM-PASSAU approach for the MediaEval 2015 "affectiv...

引用

Multimedia Benchmark Workshop, MediaEval 2015

作者： Trigeorgis, George Coutinho, Eduardo Ringeval, Fabien Marchi, Erik Zafeiriou, Stefanos Schuller, Björn Department of Computing Imperial College London United Kingdom Machine Intelligence and Signal Processing Group Technische Universität München Munich Germany Department of Complex and Intelligent Systems University of Passau Germany

In this paper we describe the Imperial College London, Technische Universitat München and University of Passau (ICL+TUM+PASSAU) team approach to the MediaEval's "Affective Impact of Movies" challenge, which consists in the automatic detection of affective (arousal and valence) and violent content in movie excerpts. In addition to the baseline features, we computed spectral and energy related acoustic features, and the probability of various objects being present in the video. Random Forests, AdaBoost and Support Vector Machines were used as classification methods. Best results show that the dataset is highly challenging for both affect and violence detection tasks, mainly because of issues in inter-rater agreement and data scarcity.

关键词： Adaptive boosting

来源：评论

学校读者我要写书评

暂无评论

Author Correction: BigNeuron: a resource to benchmark and predict performance of algorithms for automated tracing of neurons in light microscopy datasets

引用

Nature methods 2024年第10期21卷 1959页

作者： Linus Manubens-Gil Zhi Zhou Hanbo Chen Arvind Ramanathan Xiaoxiao Liu Yufeng Liu Alessandro Bria Todd Gillette Zongcai Ruan Jian Yang Miroslav Radojević Ting Zhao Li Cheng Lei Qu Siqi Liu Kristofer E Bouchard Lin Gu Weidong Cai Shuiwang Ji Badrinath Roysam Ching-Wei Wang Hongchuan Yu Amos Sironi Daniel Maxim Iascone Jie Zhou Erhan Bas Eduardo Conde-Sousa Paulo Aguiar Xiang Li Yujie Li Sumit Nanda Yuan Wang Leila Muresan Pascal Fua Bing Ye Hai-Yan He Jochen F Staiger Manuel Peter Daniel N Cox Michel Simonneau Marcel Oberlaender Gregory Jefferis Kei Ito Paloma Gonzalez-Bellido Jinhyun Kim Edwin Rubel Hollis T Cline Hongkui Zeng Aljoscha Nern Ann-Shyn Chiang Jianhua Yao Jane Roskams Rick Livesey Janine Stevens Tianming Liu Chinh Dang Yike Guo Ning Zhong Georgia Tourassi Sean Hill Michael Hawrylycz Christof Koch Erik Meijering Giorgio A Ascoli Hanchuan Peng Institute for Brain and Intelligence Southeast University Nanjing China. Microsoft Corporation Redmond WA USA. Tencent AI Lab Bellevue WA USA. Computing Environment and Life Sciences Directorate Argonne National Laboratory Lemont IL USA. Kaya Medical Seattle WA USA. University of Cassino and Southern Lazio Cassino Italy. Center for Neural Informatics Structures and Plasticity Krasnow Institute for Advanced Study George Mason University Fairfax VA USA. Faculty of Information Technology Beijing University of Technology Beijing China. Beijing International Collaboration Base on Brain Informatics and Wisdom Services Beijing China. Nuctech Netherlands Rotterdam the Netherlands. Janelia Research Campus Howard Hughes Medical Institute Ashburn VA USA. Department of Electrical and Computer Engineering University of Alberta Edmonton Alberta Canada. Ministry of Education Key Laboratory of Intelligent Computation and Signal Processing Anhui University Hefei China. Paige AI New York NY USA. Scientific Data Division and Biological Systems and Engineering Division Lawrence Berkeley National Lab Berkeley CA USA. Helen Wills Neuroscience Institute and Redwood Center for Theoretical Neuroscience UC Berkeley Berkeley CA USA. RIKEN AIP Tokyo Japan. Research Center for Advanced Science and Technology (RCAST) The University of Tokyo Tokyo Japan. School of Computer Science University of Sydney Sydney New South Wales Australia. Texas A&M University College Station TX USA. Cullen College of Engineering University of Houston Houston TX USA. Graduate Institute of Biomedical Engineering National Taiwan University of Science and Technology Taipei Taiwan. National Centre for Computer Animation Bournemouth University Poole UK. PROPHESEE Paris France. Department of Neuroscience Columbia University New York NY USA. Mortimer B. Zuckerman Mind Brain Behavior Institute Columbia University New York NY USA. Department of Computer Science Northern Illinois Universit

来源：评论

学校读者我要写书评

暂无评论

An integratable verifiable secret sharing mechanism

引用

International Journal of Network Security 2016年第4期18卷 617-624页

作者： Liu, Yanjun Chang, Chin-Chen Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and Technology Anhui University No. 111 Jiulong Rd Hefei230601 China Department of Computer Science and Information Engineering Asia University No. 500 Lioufeng Rd Wufeng Taichung413 Taiwan Department of Information Engineering and Computer Science Feng Chia University No. 100 Wenhwa Rd Seatwen Taichung413 Taiwan

Threshold secret sharing (SS), also denoted as (t, n) SS, has been used extensively in the area of information se- curity, such as for group authentication, cloud storage schemes, secure parallel communication and wireless mul- tipath routing protocols. However, a (t, n) SS cannot de- tect any deceptions among the dealer and shareholders. Veriable secret sharing (VSS) overcomes the weakness of (t, n) SS in such a way that it is able to detect cheaters by verifying the validity of shares or the correctness of the recovered secret under the condition that both shares and the secret are not compromised. Recently, two non- interactive VSSs based on Asmuth-Bloom's SS were pro- posed by Harn et al. and Liu et al., respectively. Both VSSs require shareholders to examine the range of values of some integers related to the secret before recovering the secret, which is a time-consuming operation. In this paper, we propose a novel integratable VSS mechanism that integrates the concepts of the generalized Chinese remainder theorem (GCRT), Shamir's SS and Asmuth- Bloom's SS. Our proposed VSS can verify that the secret reconstructed by any t or more shareholders is the same as the one that the dealer has generated. Analysis shows that our proposed VSS can provide perfect secrecy and better efficiency.

关键词： Hash functions

来源：评论

学校读者我要写书评

暂无评论

Image authentication and self-recovery scheme based on the rehashing model

引用

Journal of Information Hiding and Multimedia signal processing 2016年第3期7卷 460-474页

作者： Lyu, Wan-Li Chang, Chin-Chen Wang, Feng Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and Technology Anhui University Hefei230039 China Department of Information Engineering and Computer Science Feng Chia University 100 Wenhwa Rd. Seatwen Taichung40724 Taiwan Department of Computer Science and Information Engineering Asia University Taichung41354 Taiwan Department of Mathematics and Physics Fujian University of Technology FuzhouFujian350108 China

An effective image tamper localization and self-recovery scheme that uses the rehashing model is proposed in this paper. The aim of the proposed scheme was to reduce the failure rate in detecting image tamper areas and achieve high rates of successful detection. To achieve this aim, the proposed scheme uses a set of hash functions which are called the rehashing model, gained an optimal decreasing collision method to detect tamper areas With an improved and accurate tamper detection rate, the tampered image can be recovered more accurately. The quality of the proposed scheme was tested with gray and color images. The experimental results indicated that the proposed scheme has good performance in locating tamper locations and allows image recovery with an acceptable visual quality up to 50% of the image content tampered. © 2016.

关键词： Hash functions

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：