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24 results on '"Su, Zhiyuan"'

3. An Efficient Charging Algorithm for UAV-aided Wireless Sensor Networks

Author

Zhixiong Na, Su Zhiyuan, Haibing Yang, Yang Long'an, and Feng Yan

Subjects
business.industry, Computer science, Node (networking), ComputerApplications_COMPUTERSINOTHERSYSTEMS, 020206 networking & telecommunications, 02 engineering and technology, Inductive charging, Obstacle avoidance, 0202 electrical engineering, electronic engineering, information engineering, Wireless, ComputerSystemsOrganization_SPECIAL-PURPOSEANDAPPLICATION-BASEDSYSTEMS, Wireless power transfer, business, Algorithm, Wireless sensor network, Energy (signal processing), Efficient energy use
Abstract

Limited battery capacity is one of the most critical factors which limits the development of wireless sensor networks (WSN). In recent years, breakthrough in the field of wireless energy transmission and rechargeable batteries have provided an opportunity for the development of WSN. In tis paper, UAVs with large-capacity batteries can be used as a mobile charger to transmit energy to sensor nodes. At the same time, we proposed a route algorithm for UAVs with controllability and obstacle avoidance characteristics, which can replenish energy for seniors in WSN. Given that the sensor will run out of energy. In the case of not being charged in time, the sensor can be charged by UAVs with the help of wireless charging technology. In order to minimize the dead node in the WSN and maximize the energy efficiency in the charging process, we built a mathematical model which can realize our goal. Compared with NJNP, we prove the validity and rationality of our algorithm.

Published
2020

15. A Navigation Method of Information Fusion and Mutual Aid Based on Map for Logistic AGV

Author

Li Zhongming, Weng Xun, and Su Zhiyuan

Subjects
Engineering, business.industry, ComputerApplications_COMPUTERSINOTHERSYSTEMS, Mobile robot, Sensor fusion, Motion control, Odometer, Mobile robot navigation, Robustness (computer science), Information model, Computer vision, Motion planning, Artificial intelligence, business
Abstract

According to the problem of robustness and realtime performance in AGV by vision navigation, a navigation method is present in this paper, in which information fusion and mutual aid based on map is adopted. Information model of path is build and direction type of path element is defined. Turning direction for all turning points in whole route can be got by table of judgment rule. Angle of turning can be computed by position information stored in database. Different sensors information is used to control motion of AGV in straight line path and turning path. Map system is developed and can integrate with other sensors information. This method is verified by experiment.

Published
2014

16. Fidelity management and evaluation in logistics system

Author

Liu Yu-Kun, Fu Yu, Su Zhiyuan, and Zhou Xiaoguang

Subjects
Distribution center, Engineering, Index (economics), business.industry, media_common.quotation_subject, Systems engineering, Fidelity, business, media_common, Reliability engineering
Abstract

This paper discusses fidelity of simulation in logistics systems. A method to manage fidelity is developed, and three standards according to which fidelity levels can be described are presented. To quantify the differences between different fidelity levels, a Book Retrieval Module in a Book Distribution Center Design Project is studied, three models with different fidelity levels are built, and a method to calculate the differences is given. A system of evaluation index is developed. Some suggestions about fidelity management and evaluation are given at last.

Published
2009

17. GroupTrust: Dependable Trust Management.

Author

Fan, Xinxin, Liu, Ling, Li, Mingchu, and Su, Zhiyuan

Subjects
SCIENTIFIC computing, OPEN systems theory, CORPORATE image, SERVER farms (Computer network management), INTERNET of things
Abstract

As advanced computing and communication technologies penetrate every aspect of our life, we have witnessed the persistent growth of open systems where entities interact with one another without prior knowledge or experiences. Trust becomes an important metric in such open systems. This paper presents a dependable trust management scheme—GroupTrust, and a working system to support GroupTrust. It makes three original contributions. First, we identify a set of vulnerabilities that are common in existing reputation based trust models. We show that reputation trust built solely on direct experiences or by combining direct experiences with uniform trust propagation can be vulnerable. Second, we develop GroupTrust, a dependable trust management scheme to provide reliable trust management in the presence of dishonest ratings, malicious camouflage, and malicious collusive behaviors. The GroupTrust scheme is novel in two aspects: (i) we develop a pairwise similarity based feedback credibility to enhance the resilience of trust computation in the presence of dishonest ratings; (ii) we propose to propagate trust based on a Susceptible-Infected-Recovered (SIR) model, which defines trust propagation threshold to control how trust should be propagated. Finally, we evaluate the effectiveness of GroupTrust against four threat models using both simulated and real world datasets. Our experimental results show that feedback credibility based local trust computation can effectively constrain strategically malicious participants from taking advantages of their dishonest ratings. SIR-based trust propagation control enables safe trust propagation and blocks irrational trust propagation. We show that GroupTrust scheme significantly outperforms other trust models in terms of both performance and attack resilience in the presence of dishonest feedbacks, sparse feedbacks, and strategically malicious participants against four representative threat models. [ABSTRACT FROM PUBLISHER]

Published
2017
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