检索结果-内蒙古大学图书馆

UPB Scientific Bulletin, Series C: Electrical engineering and Computer Science 2020年第4期82卷 275-286页

作者： Wu, Qianqiong Chang, Xiaoying Zhao, Meihua Li, Mingwei College of electrical engineering and automation Luoyang Institute of Science and Technology Luoyang China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

A rotor position observer based on hysteresis comparator (HC) was presented to acquire the rotor position angle of the Doubly-fed induction generator (DFIG) under unbalanced grid Voltage conditions. The position and velocity of DFIG’s rotor were estimated by the observer with hysteresis comparator. The system structure is relatively simple, without adjusting any parameters, easy to achieve. Simulation model for wind energy generation system-with DFIG is set up. The simulation results show that the control strategy is feasible and efficient. © 2020, Politechnica University of Bucharest. All rights reserved.

关键词： Asynchronous generators

来源：评论

学校读者我要写书评

暂无评论

Body Shape Recognition and Prototype Construction Based on LightGBM Algorithm

Body Shape Recognition and Prototype Construction Based on L...

引用

2021 International Conference on Applied Mathematics, Modeling and Computer Simulation, AMMCS 2021

作者： Wang, Lanmin Wang, Hongmin Liu, Li Liu, Hao School of Textile Science and Engineering Tiangong University Tianjin China School of Fashion Art and Engineering Beijing Institute of Fashion Technology Beijing China Institute of Smart Wearable Electronic Textiles Tiangong University Tianjin China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781643682549

The regional characteristics of middle-aged women in Xinjiang are obvious, and the phenomenon of incompatible clothing is prominent. In order to avoid the information loss of principal component analysis or factor analysis during body type classification, this study uses the LightGBM algorithm to establish a body type recognition model based on the results of K-Means clustering, and compares it with random forest and linear regression recognition models. It is found that the LightGBM model has the best body type recognition effect. it is good. Through correlation analysis and regression analysis, regression equations between variables are obtained. Based on the new cultural prototype, Liu Ruipu women's clothing prototype, and Donghua prototype, a clothing prototype suitable for middle-aged women in Xinjiang is established. Through virtual fitting evaluation and actual fitting, the experimental prototypes established based on the Donghua prototype and the Liu Ruipu prototype can meet the needs of middle-aged women for the comfort and aesthetics of clothing. The experimental prototype established by the Donghua prototype has the best effect. © 2022 The authors and IOS Press.

关键词： K-means clustering

来源：评论

学校读者我要写书评

暂无评论

Certificateless non-interactive key exchange protocol without pairings

Certificateless non-interactive key exchange protocol withou...

引用

International Conference on Security and Cryptography (SECRYPT)

作者： Yun Wei Fushan Wei Chuangui Ma State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Information Science and Technology Institute Zhengzhou China

Non-interactive key exchange (NIKE) allows two parties to establish a shared key without communications. In ID-based non-interactive key exchange (ID-NIKE) protocols, private key generator (PKG) knows user's private key, so it can calculate the shared key between two participants, and most constructions of ID-NIKE need expensive pairing operation. To overcome these disadvantages, a security model of certificateless non-interactive key exchange (CL-NIKE) is proposed in this paper. And a scheme without pairings is also given. The proposed protocol is proved secure in the Random Oracle Model (ROM) based on the gap Diffie-Hellman (GDH) and computational Diffie-Hellman (CDH) problem. In the new protocol, key generation center (KGC) only knows user's partial key and is not able to calculate the shared key. Moreover, the new protocol is more efficient than the existing ID-NIKE schemes because it is pairing-free.

关键词： Protocols Games Computational modeling Public key cryptography Probabilistic logic

来源：评论

学校读者我要写书评

暂无评论

A Parallel Probabilistic Approach to Factorize a Semiprime

引用

American Journal of Computational Mathematics 2018年第2期8卷 175-183页

作者： Jianhui Li Department of Computer Science Guangdong Neusoft Institute Foshan City Foshan China State Key Laboratory of Mathematical Engineering and Advanced Computing Wuxi China

In accordance with the distributive traits of semiprimes’ divisors, the article proposes an approach that can find out the small divisor of a semiprime by parallel computing. The approach incorporates a deterministic search with a probabilistic search, requires less memory and can be implemented on ordinary multicore computers. Experiments show that certain semiprimes of 27 to 46 decimal-bits can be validly factorized with the approach on personal computer in expected time.

关键词： Parallel Probabilistic Integer Factorization Semiprime

来源：评论

学校读者我要写书评

暂无评论

LENSER: A Channel state Information Based Indoor Localization Scheme for Malicious Devices

LENSER: A Channel State Information Based Indoor Localizatio...

引用

IEEE Internatonal Conference on Mobile Adhoc and Sensor Systems (MASS)

作者： Yongqiang Ma Xiangyang Luo Ruixiang Li Shaoyong Du Wenyan Liu Key Laboratory of Cyberspace Situation Awareness of Henan Province State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

Rapid and accurate localization of illicit micro-recorders, cameras, and other wireless network devices is of great significance for ensuring public privacy and security. However, existing methods are susceptible to environmental noise, have low localization accuracy, high localization time overhead, and require extensive manual involvement. To address these issues, we propose LENSER, a channel state information based indoor localization scheme for illicit wireless network devices. First, we set detection points to capture signal amplitude distribution changes during the antenna array rotation process, thus determining whether there is a line-of-sight propagation relationship between the detection point and the malicious device. Next, we identify the room containing the malicious device based on the line-of-sight propagation relationship and calibrate the measured position and estimate the direction of the malicious device using existing methods within the room. Finally, we establish a linear space based on the direction of the malicious device and propose an iterative comparison method based on received signal strength indicator to localize malicious devices accessing public Wi-Fi networks within the room. We conducted 1200 experiments in four buildings with different layouts and building materials. The results show that LENSER’s average localization time is 12.5 minutes, and the average localization accuracy is 26.4 centimeters, an improvement of 11.1% to 86.1% in average localization accuracy and a reduction of 11.1% to 58.2% in average localization time compared to existing methods, such as Spotfi, Lumos, SCamF, SNOOPDOG, and Region Division.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Bandwidth-based Application-Aware Multipath Routing for NoCs

Bandwidth-based Application-Aware Multipath Routing for NoCs

引用

2015 International Conference on Computer Information Systems and Industrial Applications(CISIA2015)

作者： X.T.Ding C.X.Yang X.W.Ren P J.Ren Institute of Artificial Intelligence and Robotics Xi'an Jiaotong University State Key Laboratory of Mathematical Engineering and Advanced Computing

ISBN: (纸本)9781510805750

Most of routing algorithms for On-chip communication are neither application-aware nor routing packets using multiple *** addition,they hardly consider link bandwidth variation resulting from widely applied global asynchronous local synchronous(GALS) *** this paper,we propose a bandwidth-based application-aware multipath routing(BAMR)algorithm to assign multiple routing paths by leveraging the knowledge of application and network bandwidth *** the increase of number of flows resulting from the split of flows,we present a new method named dynamic-amount fixed-number(DAFN) flow control mechanism to avoid *** compare our algorithm with XY,YX,and OITURN with synthetic traffic patterns and traffic trace of parallel implementation of *** demonstrate that BAMR achieves higher throughput with decrease in ***,the proposed algorithm achieves better workload balance by distributing traffic over multiple paths.

关键词： on-chip network GALS multiple routing

来源：评论

学校读者我要写书评

暂无评论

Fast Scalar Multiplication Algorithm Using Constrained Triple-Base Number System and Its Applications

Fast Scalar Multiplication Algorithm Using Constrained Tripl...

引用

International Conference on Broadband, Wireless computing, Communication and Applications (BWCCA)

作者： Yunqi Dou Jiang Weng Chuangui Ma Fushan Wei Zhengzhou Information Science and Technology Institute State key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

With the rapid development of embedded devices, wireless sensor network and Internet of Things, elliptic curve cryptography as a public key cryptography plays an important role to solve the security challenges. How to improve the efficiency of scalar multiplication is a challenging work for future deployment of these new technologies. Because of its sparsity, triple-base number system is used to accelerate the scalar multiplication in elliptic curve cryptography. Instead of using triple base chain, we introduce the concept of constrained tripe-base number system, which sets maximums for exponents of bases 2, 3 and 5. On this basis, we propose two fast scalar multiplication algorithms for the situations with and without precomputations. Our experiments show that the two algorithms are more efficient than 4-NAF, double-base chain and triple-base chain approaches. The improvement of efficiency makes the two scalar multiplication algorithms more suit for wireless sensor network.

关键词： Elliptic curves Elliptic curve cryptography Wireless sensor networks Greedy algorithms Jacobian matrices

来源：评论

学校读者我要写书评

暂无评论

Network Coordinate System using Non-negative Matrix Factorization based on KL Divergence

Network Coordinate System using Non-negative Matrix Factoriz...

引用

International Conference on advanced Communication Technology

作者： Lixiang Chai Xiangyang Luo Fan Zhao Mingyue Li Siqi Liu The State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Information Science and Technology Institute Zhengzhou China

ISBN: (纸本)9781509048922

Network coordinate is used to predict the network delay between the network nodes, for the problem that the accuracy of predicting the network delay of the network coordinate system based on non-negative matrix factorization is low, proposing a new network coordinate system using non-negative matrix factorization based on KL divergence (KL-NMF). First, the advantages and disadvantages of classical algorithm for delay prediction of network coordinate system based on matrix factorization are analysed. Then, according to the characteristics of network link delay distributions, proposed a new network coordinate system based on KL-NMF algorithm and the algorithm flow. Experiment based on the four commonly used network delay matrix data set, and the results show that compared to the existing delay prediction algorithm based on NMF network coordinate system, the delay prediction algorithm based on KL-NMF network coordinate system not only reduce the error to reproduce delay matrix, but also improve the network node delay prediction accuracy.

关键词： Network Coordinate Non-negative Matrix Factorization KL Divergence Link Delay Distribution Node Delay Prediction

来源：评论

学校读者我要写书评

暂无评论

Design and Implementation of Links Generation for Inter Domain Routing System 12

Design and Implementation of Links Generation for Inter Doma...

引用

12th International Conference on Information Science and Technology, ICIST 2022

作者： Wang, Yu Qiao, Zhi Yin, Junru Zhang, Mingliang College of Software Henan University of Engineering Zhengzhou China College of Information and Electrical Engineering China Agriculture University Beijing China College of Computer and Communication Engineering Zhengzhou University of Light Industry Zhengzhou China State Key Laboratory of Mathematical Engineering and Advanced Computing Network Research Department Zhengzhou China

ISBN: (数字)9781665485821

ISBN: (纸本)9781665485821

Due to the inherent flaws of BGP protocol, the security of inter domain routing system has been regularly threatened. Since it is difficult to achieve collaborative defense against existing resources and strategies of multiple autonomous systems, this paper designs and organizes them into autonomous system community. Within the community, a precomputing multi-link generation mechanism is proposed based on genetic algorithm. Before the inter domain routing system is attacked, the link set can be generated as complete as possible in advance. Once an attack occurs, the community will quickly select proper precomputing links to replace the failed ones, in order to ensure the stability of inter domain communication. The effectiveness of the mechanism has been proved in function and performance through simulation experiments. © 2022 IEEE.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Interference-assisted kaleidoscopic meta-plexer for arbitrary spin-wavefront manipulation

引用

Light(Science & Applications) 2019年第1期8卷 1141-1150页

作者： He-Xiu Xu Guangwei Hu Ying Li Lei Han Jianlin Zhao Yunming Sun Fang Yuan Guang-Ming Wang Zhi Hao Jiang Xiaohui Ling Tie Jun Cui Cheng-Wei Qiu Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Air and Missile Defense College Air force Engineering University710051 Xi’anChina Hunan Provincial Key Laboratory of Intelligent Information Processing and Applications College of Physics and Electronics EngineeringHengyang Normal University421008 HengyangChina School of Natural and Applied Sciences Northwestern Polytechnical University710072 Xi’anChina Advanced Technique Department Key Lab of Aeronautics Computing Technique710075 Xi’anChina State Key Laboratory of Millimeter Waves Southeast University210096 NanjingChina

Achieving simultaneous polarization and wavefront control,especially circular polarization with the auxiliary degree of freedom of light and spin angular momentum,is of fundamental importance in many optical *** are typically undesirable in highly integrated photonic circuits and ***,we propose an interference-assisted metasurface-multiplexer(meta-plexer)that counterintuitively exploits constructive and destructive interferences between hybrid meta-atoms and realizes independent spin-selective wavefront *** kaleidoscopic meta-plexers are experimentally demonstrated via two types of single-layer spinwavefront multiplexers that are composed of spatially rotated anisotropic *** type generates a spinselective Bessel-beam wavefront for spin-down light and a low scattering cross-section for stealth for spin-up *** other type demonstrates versatile control of the vortex wavefront,which is also characterized by the orbital angular momentum of light,with frequency-switchable numbers of beams under linearly polarized wave *** findings offer a distinct interference-assisted concept for realizing advanced multifunctional photonics with arbitrary and independent spin-wavefront features.A variety of applications can be readily anticipated in optical diodes,isolators,and spin-Hall meta-devices without cascading bulky optical elements.

关键词： arbitrary momentum versatile

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：