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A Solution of Human-Computer Remote Interaction with Tactile Feedback

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A Solution of Human-Computer Remote Interaction with Tactile...

International wireless communications and Mobile Computing Conference, IWCMC

作者： Shouxiang Ni Jianxin Chen Yanan Chen Mingkai Chen Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing China

In human-computer interaction, we need to use human's multiple sensory channels and motion channels to improve its naturalness and efficiency. These channels include voice, handwriting, posture, vision, expression, etc. Visual-based human-computer interaction systems are often mentioned in the literature. The system uses a camera to monitor and track the operator's posture, and sets corresponding commands to control the movement of the robot. On top of that, we add tactile feedback to allow the robot to accomplish more tasks. In the vision system, first we obtain color images and depth images through a depth camera. Secondly, we estimate the human posture through OpenPose. Finally, we map the motion of the human arm to the motion of the robotic arm. In the tactile system, first we control the movement of the magic hand through the exoskeleton. Secondly, we obtain the force values of the fingers through the magic hand. Finally, we provide force feedback to each finger through the exoskeleton.

关键词： Human computer interaction Machine vision Exoskeletons Robot vision systems Force Force feedback Tactile sensors

EM and SAGE algorithms for DOA estimation in the presence of unknown uniform noise

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arXiv 2022年

作者： Gong, Ming-Yan Lyu, Bin School of Information and Electronics Beijing Institute of Technology Beijing100081 China Key Laboratory of Ministry of Education in Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing210003 China

The expectation-maximization (EM) and space-alternating generalized EM (SAGE) algorithms have been applied to direction of arrival (DOA) estimation in known noise. In this work, the two algorithms are proposed for DOA estimation in unknown uniform noise. Both the deterministic and stochastic signal models are considered. Moreover, a modified EM (MEM) algorithm applicable to the noise assumption is also proposed. These proposed algorithms are improved to ensure the stability when the powers of sources are unequal. After being improved, numerical results illustrate that the EM algorithm has similar convergence with the MEM algorithm and the SAGE algorithm outperforms the EM and MEM algorithms for the deterministic signal model. Furthermore, numerical results show that processing the same samples from the stochastic signal model, the SAGE algorithm for the deterministic signal model requires the fewest iterations. Copyright © 2022, The Authors. All rights reserved.

关键词： Stochastic systems

EM-Type Algorithms for DOA Estimation in Unknown Nonuniform Noise

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arXiv 2022年

作者： Gong, Ming-Yan Lyu, Bin The School of Information and Electronics Beijing Institute of Technology Beijing100081 China The Key Laboratory of Ministry of Education in Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing210003 China

The expectation–maximization (EM) algorithm updates all of the parameter estimates simultaneously, which is not applicable to direction of arrival (DOA) estimation in unknown nonuniform noise. In this work, we present several efficient EM-type algorithms, which update the parameter estimates sequentially, for solving both the deterministic and stochastic maximum–likelihood (ML) direction finding problems in unknown nonuniform noise. Specifically, we design a generalized EM (GEM) algorithm and a space-alternating generalized EM (SAGE) algorithm for computing the deterministic ML estimator. Simulation results show that the SAGE algorithm outperforms the GEM algorithm. Moreover, we design two SAGE algorithms for computing the stochastic ML estimator, in which the first updates the DOA estimates simultaneously while the second updates the DOA estimates sequentially. Simulation results show that the second SAGE algorithm outperforms the first one. © 2022, CC BY.

关键词： Direction of arrival

Single-Satellite Interference Source Locating Based on Four Co-efficiency Beam 11th

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Single-Satellite Interference Source Locating Based on Four ...

11th EAI International Conference on wireless and Satellite Systems, WiSATS 2020

作者： Zhao, Laiding Zhiwei, Li Ruan, Cen Zheng, Yue Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing210003 China College of Communication Engineer Nanjing University of Posts and Telecommunications Nanjing210003 China College of Information Science and Electronic Engineering ZheJiang University ZheJiang310058 China

ISBN: (纸本)9783030690717

With the previous method based on the signal strength of the three-beam interference source [1], after studying and deriving the antenna gain pointing model, this paper proposes a single-star interference source localization method based on the signal strength of the four-beam interference source. As for solving the nonlinear directional equations, this paper proposes an improved particle swarm optimization algorithm to obtain its numerical solution, which is compared with the previous ordinary particle swarm optimization algorithm [2]. Then, using the least square method, the multi-group data is used to determine the interference source with the smallest error. First orientation and then positioning. After the simulation test of the proposed positioning method, the feasibility of the algorithm for positioning is proved. The method proposed in this paper is compared with the previous positioning method to prove the robustness of the algorithm. © 2021, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.

关键词： Least squares approximations

Complete analysis of the maximally hyperentangled state via the weak cross-Kerr nonlinearity

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arXiv 2022年

作者： Zeng, Zhi Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Nanjing210003 China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing210003 China

We present a simple method for the complete analysis of maximally hyperentangled state in polarization and spatial-mode degrees of freedom assisted by the weak cross-Kerr nonlinearity. Our method not only can be used for two-photon hyperentangled Bell state analysis and three-photon hyperentangled Greenberger-Horne-Zeilinger (GHZ) state analysis, but also is suitable for N-photon hyperentangled GHZ state analysis. In our protocols, the bit information of hyperentanglement is read out via the nonlinear interaction, and the phase information is obtained by using linear optical element and single photon detector. This approach is achievable with the current technology, and will be useful for the practical high-capacity quantum communication schemes. © 2022, CC BY.

关键词： Photons

Proposal for the complete high-dimensional Greenberger-Horne-Zeilinger state measurement

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arXiv 2022年

A theoretical proposal for the complete analysis of high-dimensional Greenberger-Horne-Zeilinger (GHZ) state is presented in this Letter. We first demonstrate the approach for the complete three-photon GHZ state measurement in three dimensions, and then generalize it to the situation of N-photon system in d dimensions. In our approach, the photonic hyperentanglement and quantum Fourier transform are both utilized. The presented proposal will be useful for the high-dimensional multi-photon quantum computation and quantum communication. © 2022, CC BY.

关键词： Quantum communication

Service Migration Algorithm Based on Markov Decision Process with Multiple QoS Attributes

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Research Square

Research Square 2021年

作者： Ma, Anhua Pan, Su Tao, Shuai Zhou, Weiwei Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education Nanjing University of Posts and Telecommunications Nanjing210003 China

With the rapid development of mobile internet cloud computing, the traditional network structure becomes non-suitable for advanced network traffic requirements. A service migration decision algorithm is proposed in the Software Defined network(SDN) to satisfy differential Quality of Service(QoS) requirements. We divide services into real-time ones and non-real-time ones due to their different requirements on time delay and transmission rates, and construct the revenue function on two QoS attributes i.e. time delay and availab.e transmission rates. We use the Markov decision process to maximize the overall benefits of users and network system to achieve the best user experience. The simulation results show that our proposed algorithm achieves better performance in terms of overall benefits than the exiting algorithms only considering single service and single QoS attribute. © 2021, CC BY.

关键词： Quality of service

Proportional Fairness-Based Energy-Efficient Power Allocation in Downlink MIMO-NOMA Systems with Statistical CSI

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China communications 2019年第12期16卷 47-55页

作者： Yonghai Lin Zhen Yang Haiyan Guo Key Laboratory of Ministry of Education in Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications

In this paper, proportional fairness(PF)-based energy-efficient power allocation is studied for multiple-input multiple-output(MIMO) non-orthogonal multiple access(NOMA) systems. In our schemes, statistical channel state information(CSI) is utilized for perfect CSI is impossible to achieve in practice. PF is used to balance the transmission efficiency and user fairness. Energy efficiency(EE) is formulated under basic data rate requirements and maximum transmitting power constraints. Due to the non-convex nature of EE, a two-step algorithm is proposed to obtain sub-optimal solution with a low complexity. Firstly, power allocation is determined by golden section search for fixed power. Secondly total transmitting power is determined by fractional programming method in the feasible regions. Compared to the performance of MIMO-NOMA without PF constraint, fairness is obtained at expense of decreasing of EE.

关键词： MIMO-NOMA energy efficiency proportional fairness fractional programming method golden section search

Research on the Loading Method of Logistics Vehicle and Cargo Based on IPSO Algorithm

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Research on the Loading Method of Logistics Vehicle and Carg...

第42届中国控制会议

作者： Zewei Zhao Huqing Wang Zhe Sun Lei Xu Guangfu Gong Xiangpeng Xie Zhixin Sun Post Industry Technology Research and Development Center of the State Posts Bureau (Internet of Things Technology) Nanjing University of Posts and Telecommunications Post Big Data Technology and Application Engineering Research Center of Jiangsu Province Nanjing University of Posts and Telecommunications Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of EducationNanjing University of Posts and Telecommunications

Logistics vehicle and cargo matching problem is a typical combination optimization problem,which has important theoretical and application value in the field of logistics *** proved particle swarm optimization(PSO) algorithm is one of the most extensive optimization methods studied in recent years,with excellent global search ability and convergence *** on the IPSO algorithm,this paper proposes an effective IPSO algorithm model for the matching problem of logistics vehicles and goods,and conducts the corresponding comparative *** final experimental results show that the algorithm has good results in practical application and can provide a feasible optimization method for solving the problem of logistics vehicles and goods.

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