检索结果-内蒙古大学图书馆

Zero and few shot learning with semantic feature synthesis and competitive learning

学校读者我要写书评

暂无评论

arXiv 2018年

作者： Lu, Zhiwu Guan, Jiechao Li, Aoxue Xiang, Tao Zhao, An Wen, Ji-Rong Beijing Key Laboratory of Big Data Management and Analysis Methods School of Information Renmin University of China Beijing100872 China School of Electronics Engineering and Computer Science Peking University Beijing100871 China School of Electronic Engineering and Computer Science Queen Mary University of London LondonE1 4NS United Kingdom Samsung AI Centre Cambridge United Kingdom

Zero-shot learning (ZSL) is made possible by learning a projection function between a feature space and a semantic space (e.g., an attribute space). key to ZSL is thus to learn a projection that is robust against the often large domain gap between the seen and unseen class domains. In this work, this is achieved by unseen class data synthesis and robust projection function learning. Specifically, a novel semantic data synthesis strategy is proposed, by which semantic class prototypes (e.g., attribute vectors) are used to simply perturb seen class data for generating unseen class ones. As in any data synthesis/hallucination approach, there are ambiguities and uncertainties on how well the synthesised data can capture the targeted unseen class data distribution. To cope with this, the second contribution of this work is a novel projection learning model termed competitive bidirectional projection learning (BPL) designed to best utilise the ambiguous synthesised data. Specifically, we assume that each synthesised data point can belong to any unseen class;and the most likely two class candidates are exploited to learn a robust projection function in a competitive fashion. As a third contribution, we show that the proposed ZSL model can be easily extended to few-shot learning (FSL) by again exploiting semantic (class prototype guided) feature synthesis and competitive BPL. Extensive experiments show that our model achieves the state-of-the-art results on both problems. Copyright © 2018, The Authors. All rights reserved.

关键词： Semantics

On energy-efficient NOMA designs for heterogeneous low-latency downlink transmissions

学校读者我要写书评

暂无评论

arXiv 2018年

作者： Xu, Yanqing Shen, Chao Chang, Tsung-Hui Lin, Shih-Chun Zhao, Yajun Zhu, Gang State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China School of Science and Engineering Chinese University of Hong Kong Shenzhen China Shenzhen Research Institute of Big Data Shenzhen China Department of Department of Electronic and Computer Engineering National Taiwan University of Science and Technology Taipei Taiwan Algorithm Department Wireless Product RandD Institute ZTE Corporation Shenzhen China

This paper investigates energy-efficient resource allocation for the two-user downlink with strict latency constraints at users. To cope with strict latency constraints, the capacity formula of the finite blocklength codes (FBCs) is adopted, in contrast to the classical Shannon capacity formula. The FBC formula explicitly specifies the trade-off between blocklength and reliability. We first consider the case where the transmitter uses super-position coding based non-orthogonal multiple access (NOMA). However, due to heterogeneous latency constraints and channel conditions at users, the conventional successive interference cancellation may be infeasible. We thus propose to use different interference mitigation schemes according to heterogeneous user conditions and solve the corresponding NOMA design problems. Though the target energy function is non-convex and implicit, optimal user blocklength and power allocation can still be identified for the considered NOMA schemes and checking the problem feasibility is simple. It is observed that when the latency requirements are more heterogeneous, the NOMA scheme cannot achieve the best energy-efficiency of the downlink. In view of this, a hybrid transmission scheme which includes time division multiple access (TDMA) and NOMA as special cases is considered. Although the energy minimization is even challenging than the pure NOMA design problem, we propose a concave approximation of the FBC capacity formula which allows to obtain computationally efficient and high-quality solutions. Simulation results show that the hybrid scheme can benefits from both NOMA and TDMA. Copyright © 2018, The Authors. All rights reserved.

关键词： Energy efficiency

Research on energy recycle percentage of servo motor 2

学校读者我要写书评

暂无评论

Research on energy recycle percentage of servo motor

2nd International Conference on Precision Machinery and Manufacturing Technology, ICPMMT 2017

作者： Tseng, Yen-Ming Chen, Li-Shan Pan, Jeng-Shyang Huang, Jing Key Laboratory of Big Data Mining and Application School of Information Science and Engineering Fujian University of Technology Fuzhou City Fujian350118 China School of Management Fujian University of Technology Minhou Fuzhou City Fujian350118 China School of Information Science and Engineering Fujian University of Technology Fuzhou City Fujian350118 China

The energy recycle circuit fed back the energy to batteries is one of the important means to extend the travel distance of action vehicle for an electric vehicle or hybrid vehicle by driven batteries. In order to achieve energy recycle must be use, such as the motor characteristics, the principle of motor controller and design of circuit to reach the energy recycle of motor in action vehicles. Focus on the 24 V 8A 150W servo motor and its shaft coupling with a condition by magnetic brake to simulate as the analog load and adjust the brake to 0.2 Newton-meter. According to the characteristics of the motor, the principle of the motor controller and the design and energy recovery of the circuit system for discussion, that include drive control circuit of motor and based on the former to design the circuit of energy recycle circuit of motor and to feed back the energy to the driving batteries. According to the characteristics of the motor, the principle of the motor controller and the design and energy recovery of the circuit system for discussion, that include drive control circuit of motor and based on the former to design the circuit of energy recycle circuit of motor and to feed back the energy to the driving batteries. By mean of the architecture of energy recycle circuit to test the power recovery which divide into without load and without energy collector, without load and with energy collector, with load and without energy collector and with load and energy collector four cases under these conditions to investigate the power recovery analysis. For the statistics of energy, the average energy recovery power percentage by without load and without energy collector is 9.7%, the average energy recovery power percentage by without load and with energy collector is 20.5%, the average energy recovery power percentage by with load and without energy collector is 1.82%, and the average energy recovery power percentage by with load and with energy collector is 3.1%. © 2017

关键词： Electric network analysis

Erratum to 'Radiomics analysis of placenta on T2WI facilitates prediction of postpartum haemorrhage: A multicentre study'

学校读者我要写书评

暂无评论

EBioMedicine 2020年 55卷 102773页

作者： Qingxia Wu Kuan Yao Zhenyu Liu Longfei Li Xin Zhao Shuo Wang Honglei Shang Yusong Lin Zejun Wen Xiaoan Zhang Jie Tian Meiyun Wang Department of Medical Imaging Henan Key Laboratory of Neurological Imaging Henan Provincial People's Hospital People's Hospital of Zhengzhou University People's Hospital of Henan University Zhengzhou Henan China. School of Biomedical Engineering Shanghai Jiao Tong University Shanghai China CAS Key Laboratory of Molecular Imaging Institute of Automation Chinese Academy of Sciences Beijing China. CAS Key Laboratory of Molecular Imaging Institute of Automation Chinese Academy of Sciences Beijing China University of Chinese Academy of Sciences Beijing China. Collaborative Innovation Centre for Internet Healthcare Zhengzhou University Zhengzhou Henan China. Department of Radiology the Third affiliated Hospital of Zhengzhou University Zhengzhou Henan China. Beijing Advanced Innovation Centre for Big Data-Based Precision Medicine School of Medicine Beihang University Beijing China. Department of Radiology the Third affiliated Hospital of Zhengzhou University Zhengzhou Henan China. Electronic address: zxa@***. University of Chinese Academy of Sciences Beijing China Beijing Advanced Innovation Centre for Big Data-Based Precision Medicine School of Medicine Beihang University Beijing China Engineering Research Centre of Molecular and Neuro Imaging of Ministry of Education School of Life Science and Technology Xidian University Xi'an Shanxi China. Electronic address: jie.tian@***. Department of Medical Imaging Henan Key Laboratory of Neurological Imaging Henan Provincial People's Hospital People's Hospital of Zhengzhou University People's Hospital of Henan University Zhengzhou Henan China. Electronic address: mywang@***.

Strong Decays of The Explicitly Exotic Doubly Charmed Ddk Bound State

学校读者我要写书评

暂无评论

arXiv 2019年

作者： Huang, Yin Liu, Ming-Zhu Pan, Ya-Wen Geng, Li-Sheng Martínez Torres, A. Khemchandani, K.P. School of Physics Beihang University Beijing100191 China School of Physics Beijing Advanced Innovation Center for Big Data-based Precision Medicine Beihang University Beijing100191 China School of Physics Zhengzhou University ZhengzhouHenan450001 China Instituto de Física Universidade de São Paulo C.P. 66318 São Paulo São Paulo05389-970 Brazil School of Physics and Nuclear Energy Engineering Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang University Beijing100191 China Universidade Federal de São Paulo C.P. São Paulo01302-907 Brazil

Nowadays, it is generally accepted that the DK interaction in isospin zero is strongly attractive and the D∗s0(2317) can be described as a DK molecular state. Recent studies show that the three-body DDK system binds as well with a binding energy about 60∼70 MeV. The DDK bound state has isospin 1/2 and spin-parity 0−. If discovered either experimentally or in lattice QCD, it will not only provide further support on the molecular nature of the D∗s0(2317), but also provide a way to understand other exotic hadrons expected to be of molecular nature. In the present work, we study its two-body strong decay widths via triangle diagrams. We find that the partial decay width into DDsπ is at the order of 2 ∼ 3 MeV, which seems to be within the reach of the current experiments such as BelleII. As a result, we strongly recommend this decay channel of the DDK bound state to be searched for experimentally. Copyright © 2019, The Authors. All rights reserved.

关键词： Binding energy

Information Dissemination of Two Ways on Complex Networks

学校读者我要写书评

暂无评论

Information Dissemination of Two Ways on Complex Networks

2017 4th International Conference on Machinery,Materials and Computer(MACMC 2017)

作者： Chen Wenbin Qin Peng Shanxi Provincial Key Laboratory for Biomedical Imaging and Big Data North University of China School of Electrical and Control Engineering North University of China

An SIS information dissemination model is studied based in social network. QQ and We Chat are employed as the carrier of information dissemination. We assume that uninformed individuals can get information from either their informed QQ friends or their informed We Chat friends, and the relationship between two individuals can only be QQ relationship or We Chat relationship. Informed individuals forget the information at a certain probability. Basic reproduction number was obtained by mathematical analysis. Global stability of the disease-free equilibrium and the existence and uniqueness of endemic equilibrium were demonstrated. To illustrate our theoretical analysis, some numerical simulations are included in this paper.

关键词： information dissemination complex network reproduction number stability

Android Malware Detection Using Local Binary Pattern and Principal Component Analysis

学校读者我要写书评

暂无评论

Android Malware Detection Using Local Binary Pattern and Pri...

The Third International Conference of Pioneering Computer Scientists, Engineers and Educators,ICPCSEE 2017(originally ICYCSEE)

作者： Qixin Wu Zheng Qin Jinxin Zhang Hui Yin Guangyi Yang Kuangsheng Hu College of Computer Science and Electronic Engineering Hunan University Hunan Key Laboratory of Big Data Research and Application Hunan Institute of Metrology and Test

Nowadays, analysis methods based on big data have been widely used in malicious software detection. Since Android has become the dominator of smartphone operating system market, the number of Android malicious applications are increasing rapidly as well, which attracts attention of malware attackers and researchers alike. Due to the endless evolution of the malware, it is critical to apply the analysis methods based on machine learning to detect malwares and stop them from leakaging our privacy information. In this paper, we propose a novel Android malware detection method based on binary texture feature recognition by Local Binary Pattern and Principal Component Analysis, which can visualize malware and detect malware accurately. Also,our method analyzes malware binary directly without any decompiler,sandbox or virtual machines, which avoid time and resource consumption caused by decompiler or monitor in this process. Experimentation on 5127 benigns and 5560 malwares shows that we obtain a detection accuracy of 90%.

关键词： Android malware detection Binary texture feature Local binary pattern Principal component analysis

Nonleaky and accelerated population transfer in a transmon qutrit

学校读者我要写书评

暂无评论

Physical Review A 2017年第2期96卷 023843-023843页

作者： Xiao-Jing Lu M. Li Z. Y. Zhao Chun-Li Zhang Hong-Pei Han Zhi-Bo Feng Yun-Qing Zhou School of Electric and Mechatronics Engineering Xuchang University Xuchang 461000 China Department of Physics Key Laboratory of Oceanographic Big Data Mining & Application of Zhejiang Province Zhejiang Ocean University Zhoushan 316000 China

We propose a theoretical scheme for implementing nonleaky and accelerated population transfer with a transmon qutrit. For a transmon-regime artificial atom with weak level anharmonicity, the leakage effects on the target population transfer are considerable. Allowed by the level-transition rule, a two-photon resonant interaction can be obtained between the qutrit and microwave drivings. In the regime of large detuning, by adopting the technique of invariant-based inverse engineering, the population transfer with no leakage errors can be sped up drastically when compared with the adiabatic operation. Moreover, the accelerated operation is highly robust against decoherence effects. Thanks to these distinctive advantages, the proposed protocol could offer a promising avenue to optimal quantum operations on transmon artificial atoms.

关键词： Adiabatic quantum optimization Quantum control Quantum information architectures & platforms

A novel distance matric: Generalized relative entropy

学校读者我要写书评

暂无评论

arXiv 2017年

作者： Liu, Shuai Lu, Mengye Liu, Gaocheng Pan, Zheng College of Computer Science Inner Mongolia University Hohhot China Inner Mongolia Key Laboratory of Data Mining and Knowledge Engineering Hohhot China

Information entropy and its extension, which are important generalization of entropy, have been applied in many research domains today. In this paper, a novel generalized relative entropy is constructed to avoid some defects of traditional relative entropy. We presented the structure of generalized relative entropy after the discussion of defects in relative entropy. Moreover, some properties of the provided generalized relative entropy is presented and proved. The provided generalized relative entropy is proved to have a finite range and is a finite distance metric. Copyright © 2017, The Authors. All rights reserved.

关键词： Defects