检索结果-内蒙古大学图书馆

International Conference on Computational Intelligence and Security

作者： Hejun Xuan Yuping Wang Shanshan Hao Zhanqi Xu Xiaodong Li Xiaozhi Gao School of Computer Science and Technology Xidian University Xi'an Shaanxi China School of Computer Science and Information Technology Royal Melbourne Institute of Technology Melbourne Australia State Key Lab of Integrated Service Network Xidian University Xi'an Shaanxi China School of Engineering Science Lappeenranta University of Technology Finland

ISBN: (纸本)9781509048410

The routing, core allocation and spectrum assignment (RSA) problem in elastic optical networks with multi-core is a well-known NP-hard problem and the network information security is also an important problem in elastic optical networks. In this paper, we combine these two problems to investigate the routing, core allocation and spectrum assignment problem with the guaranteed secure level in elastic optical network with multi-core. We establish a new optimization model to determine an optimal routing, core allocation scheme with the guaranteed secure level by minimizing the maximum sequence number of frequency slots. To solve the model effectively, we propose a hybrid algorithm for routing and core allocation. First, the candidate secure paths, which can guarantee the required secure level for connection requests, are determined by using a heuristic algorithm. Then, to get an optimal routing and core allocation scheme, an effective genetic algorithm with a tailor-made crossover operator and a well-designed mutation operator is designed. Finally, simulation experiments are conducted, and the experimental results indicate that the effectiveness of the proposed model and algorithm.

关键词： Routing Resource management Optical fiber networks Sociology Statistics Multicore processing Security

来源：评论

学校读者我要写书评

暂无评论

Micro-Expression Recognition based on 2D Gabor Filter and Sparse Representation

引用

Journal of Physics: Conference Series 2017年第1期787卷

作者： Hao Zheng Key Laboratory of Trusted Cloud Computing and Big Data Analysis School of Information Engineering Nanjing XiaoZhuang University Nanjing China MOE Key Laboratory of Computer Network and Information Integration School of Computer Science and Engineering Southeast University Nanjing China State Key Laboratory for Novel Software Technology Nanjing University Nanjing China

Micro-expression recognition is always a challenging problem for its quick facial expression. This paper proposed a novel method named 2D Gabor filter and Sparse Representation (2DGSR) to deal with the recognition of micro-expression. In our method, 2D Gabor filter is used for enhancing the robustness of the variations due to increasing the discrimination power. While the sparse representation is applied to deal with the subtlety, and cast recognition as a sparse approximation problem. We compare our method to other popular methods in three spontaneous micro-expression recognition databases. The results show that our method has more excellent performance than other methods.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Novel conformal Vivaldi antenna fed by CPW 9

Novel conformal Vivaldi antenna fed by CPW

引用

9th International Conference on Microwave and Millimeter Wave technology, ICMMT 2016

作者： Tao, Lin Lizhong, Song Shangji, Liu Yongjian, Wang Zexiu, Li School of Information and Electrical Engineering Harbin Institute of Technology at Weihai Weihai264209 China Research Institute for Special Structures of Aeronautical Composite AVIC Aeronautical Science Key Lab for High Performance Electromagnetic Windows Ji'nan Shandong250023 China National Computer Network Emergency Response Technical Team Coordination Center of China Beijing100029 China

ISBN: (纸本)9781467389815

In order to realize the function of angle measurement for passive radar seeker, a novel Vivaldi antenna fed by CPW is designed. The novel structure can be more suitable for conformal because of its single side property. Elliptical slot is introduced to improve the distribution of surface current. Side fed has achieved miniaturization. The proposed antenna including the feeding line and transition measures 229×218×1mm3 and has a peak gain >4.2dBi over the 0.8-4 GHz frequency range. © 2016 IEEE.

关键词： Antenna feeders

来源：评论

学校读者我要写书评

暂无评论

Research on a kind of anti-podal Vivaldi antenna 16

Research on a kind of anti-podal Vivaldi antenna

引用

16th IEEE International Conference on Ubiquitous Wireless Broadband, ICUWB 2016

作者： Weixing, Yang Lizhong, Song Tao, Lin Shangji, Liu Yongjian, Wang School of Information and Electrical Engineering Harbin Institute of Technology Weihai Shandong Weihai264209 China Research Institute for Special Structures of Aeronautical Composite AVIC Aeronautical Science Key Lab for High Performance Electromagnetic Windows Ji'nan Shandong250023 China National Computer Network Emergency Response Technical Team Coordination Center of China Beijing100029 China

ISBN: (纸本)9781509013173

This paper researched a kind of antipodal Vivaldi antenna for passive guidance radar application on the missile. In order to achieve better characteristics of end-fire, a rectangular slot was used to change the antenna surface current distribution on the basis of the original antenna. To solve the problem of low gain for the conventional antipodal Vivaldi antenna, an ellipse parasitic patch was introduced at the end of radiation zone of the antipodal Vivaldi antenna. Simulation results showed that the average gain of the antenna is increased by 2.5dBi. Finally, this paper discussed the performance changes of the antipodal Vivaldi antenna unit when it is conformal with the surface of a cylinder. The analysis and simulation result were provided and can be as a technical reference for the practical engineering application. © 2016 IEEE.

关键词： Slot antennas

来源：评论

学校读者我要写书评

暂无评论

Pabively Q-switched erbium-doped fiber laser using Fe3O4-nanoparticle saturable absorber

引用

Applied Physics Express 2016年第4期9卷

作者： Bai, Xuekun Mou, Chengbo Xu, Luxi Wang, Shaofei Pu, Shengli Zeng, Xianglong Key Lab of Specialty Fiber Optics and Optical Acceb Network Shanghai University Shanghai200072 China Aston University BirminghamB4 7ET United Kingdom College of Science University of Shanghai for Science and Technology Shanghai200093 China

We experimentally demonstrate pabively Q-switched erbium-doped fiber laser (EDFL) operation using a saturable absorber (SA) based on Fe3O4 nanoparticles (FONPs). As a type of transition metal oxide, the FONPs have a large nonlinear optical response and fast response time. The FONPbased SA pobebes a modulation depth of 8.2% and nonsaturable absorption of 56.6%. Stable pabively Q-switched EDFL pulses with an output pulse energy of 23.76 nJ, a repetition rate of 33.3 kHz, and a pulse width of 3.2 μs were achieved when the input pump power was 110mW. The laser features a low threshold pump power of > 15mW. © 2016 The Japan Society of Applied Physics.

关键词： Saturable absorbers

来源：评论

学校读者我要写书评

暂无评论

A fast traffic classification method based on SDN network

A fast traffic classification method based on SDN network

引用

作者： Li, Wei Li, Guojun Yu, Xiufen Key Lab of Beijing Network Technology School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9781138028302

With the development of mobile Internet, the functionality and portability of mobile device have changed greatly. Many users gradually adapt to using a variety of applications on mobile devices. Mobile applications are combined with other technologies, such as cloud computing and CDN, which make the traffic classification become more and more complex. Application traffic classification is the basis of network quality of service management, security and intrusion detection. A current classification method based on machine learning technology can identify app offline. Subjected to traditional network architecture, online classification is less efficient, and cannot meet the new business demand. This paper proposed a novel method that integrates SDN architecture and nearest application based cluster classifier, then designed a prototype system on a multicore processor platform. A number of experiments are carried out on a real-world traffic dataset to demonstrate the effectiveness and robustness of the proposed approach. © 2015 Taylor & Francis Group, London.

关键词： Intrusion detection

来源：评论

学校读者我要写书评

暂无评论

Fair Downlink Traffic Management for Hybrid LAA-LTE/Wi-Fi networks

Fair Downlink Traffic Management for Hybrid LAA-LTE/Wi-Fi Ne...

引用

IEEE Global Communications Conference

作者： Yang Li Mengying Zhang Yang Yang Xudong Wang School of Information Science and Technology ShanghaiTech University Key Lab of Wireless Sensor Network and Communication Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences UM-SJTU Joint Institute Shanghai Jiao Tong University

ISBN: (纸本)9781509013296

Due to the scarcity of the licensed spectrum, Licensed-Assisted Access Long-Term Evolution (LAA-LTE) network can be deployed in unlicensed spectrum, which is currently occupied by different Wi-Fi systems. It is a very challenging problem to ensure fair coexistence between LAA-LTE and Wi-Fi networks, in terms of spectrum sharing and traffic management. To solve this problem, a Fair Downlink Traffic Management (FDTM) scheme is proposed in this paper for hybrid LAA-LTE/Wi-Fi networks. By using the genetic algorithm, FDTM tunes the minimum Contention Window (CW_(min)) values and assigns feasible weights for the LAA eNBs with different traffic loads, thus to achieve (1) fair spectrum sharing with the existing Wi-Fi networks in unlicensed bands, and (2) fair service differentiation for downlink LAA-LTE traffic. Numerical results show our FDTM scheme can guarantee the throughput of Wi-Fi networks in shared unlicensed spectrum, while supporting proportional fairness for the LAA eNBs with different weights and CW_(min) values.

关键词： IEEE 802.11 Standard Throughput Downlink Genetic algorithms Long Term Evolution Biological cells Electronic mail

来源：评论

学校读者我要写书评

暂无评论

HANSpeller++: A unified framework for chinese spelling correction 8

HANSpeller++: A unified framework for chinese spelling corre...

引用

8th SIGHAN Workshop on Chinese Language Processing, SIGHAN 2015

作者： Zhang, Shuiyuan Xiong, Jinhua Hou, Jianpeng Zhang, Qiao Cheng, Xueqi CAS Key Laboratory of Network Data Science and Technology China Institute of Computing Technology Chinese Academy of Sciences China University of Chinese Academy of Sciences China

ISBN: (纸本)9781941643570

Increased interest in China from foreigners has led to a corresponding interest in the study of Chinese. However, the learning of Chinese by non-native speakers will encounter many difficulties, Chinese spelling check techniques for Chinese as a Foreign Language(CFL) learners is highly desirable. This paper presents our work on the SIGHAN-2015 Chinese Spelling Check task. The task focuses on spelling checking on Chinese essays written by CFL learners. We propose a unified framework called HANSpeller++ based on our previous HANSpeller for Chinese spelling correction. The framework consists of candidate generating,candidates re-ranking and final global decision making. Experiments show good performance on the test data of the task. © 2015 Proceedings of the 8th SIGHAN Workshop on Chinese Language Processing, SIGHAN 2015 - co-located with 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing, ACL IJCNLP 2015. All rights reserved.

关键词： Decision making

来源：评论

学校读者我要写书评

暂无评论

Scheme for realizing passive quantum key distribution with heralded single-photon sources

引用

Physical Review A 2016年第3期93卷 032312-032312页

作者： Qin Wang Chun-Hui Zhang Xiang-Bin Wang Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing 210003 China Key Laboratory of Quantum Information University of Science and Technology of China Hefei 230026 China Department of Physics and State Key Laboratory of Low Dimensional Quantum Physics Tsinghua University Beijing 100084 China Jinan Institute of Quantum Technology Shandong Academy of Information Technology Jinan China

We present a scheme for realizing passive quantum key distribution with heralded single-photon sources. In this scheme, the idler light from the parametric down-conversion process is split into two parts and sent into two local detectors individually. Then all the clicking and nonclicking events are used to herald the arrival and nonarrival of the signal light. As a result, a precise estimation of the behavior of the single-photon pulses can be achieved without changing the light intensity. Furthermore, we compare our scheme with other existing methods with the Bennett-Brassard 1984 (BB84) protocol through numerical simulations. Our simulations demonstrate that the performance of our scheme can greatly overcome other existing practical methods and approach very close to the asymptotic case of using infinite-decoy-state methods.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

IABC robotic evolutionary model for the foreign exchange rate prediction in Central America trading agreement events

IABC robotic evolutionary model for the foreign exchange rat...

引用

IEEE Symposium Series on Computational Intelligence (SSCI)

作者： Pei-Wei Tsai Jing Zhang Yao He Jui-Fang Chang Li-Hui Yang Wein-Duo Yang College of Information Science and Engineering Fujian Provincial Key Lab. of Big Data Mining & Apps. Fujian University of Technology Fuzhou China Department of International Business National Kaohsiung University of Applied Science Kaohsiung Taiwan

ISBN: (纸本)9781509042418

Taiwanese economy is extremely export-oriented. However, Taiwan also starts to actively look for opportunities for participation, because of the slowdown of multinational liberalizations, and as a result of the advance of the regional economic integration trend. As an example, Taiwan vigorously participates in FTAs with countries in Asia and Central America. International economic conditions are significantly important to the international trade and the volume of export/import volume, which is affected by the foreign exchange rate. If contemporary researchers could take full advantage of the exchange rate forecasting, Taiwan could maximize its trade surplus, thus boosting the economic growth. Conventional foreign exchange rate forecasting is usually provided by analyzing many financial indices or with the time-series method. Our goal is to produce the foreign exchange rate forecasting result by the robotic way with an evolutionary computing method called Interactive Artificial Bee Colony algorithm. Based on the event study methodology, the selected agreements include four FTA that are ECFA, BIA, ASTEP and ANZTEC, and the observation period setting is 70 days of pre-event period and 70 days of post-event period. This paper uses time series model (GARCH, EGARCH) and Interactive artificial bee colony (IABC) to establish the exchange rate predicting models. In addition, we adopt Mean Absolutely Percentage Error (MAPE) to compare the accuracy of exchange rate prediction. There are many exchange rate predicting models and the most frequently one to conduct maybe the time series model. This research reveals that even the IABC is relatively new it is the model has the best predictive ability among all the models.

关键词： Exchange rates Predictive models Forecasting Mathematical model Time series analysis

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：