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81 results on '"Wang, YanWei"'

17. Trusted Edge Cloud Computing Mechanism Based on FPGA Cluster

Author

Shen Yanmei, Dongdong Su, Li Rengang, Wang Yanwei, Kan Hongwei, and Liu Wei

Subjects
business.industry, Computer science, Cloud computing, Encryption, law.invention, law, Embedded system, Server, Internet Protocol, Data center, Enhanced Data Rates for GSM Evolution, business, Field-programmable gate array, PCI Express
Abstract

To solve the problem of computing overload in cloud, we intend to design a trusted edge cloud computing model and method based on FPGA (Field Programmable Gate Array) clusters. Firstly, a device, named FPGA Box, with PCIe (Peripheral Component Interconnect Express) power supply capability is used to manage the FPGA accelerator in the model. Besides, the FPGA cluster provide heterogeneous accelerated computing services for the data center through the network. Furthermore, we proposed a trusted edge cloud computing method based on FPGA cluster. On the one hand, a bi-level encryption algorithm based on RSA is proposed to generate an authorized use code, which implied the FPGA accelerator IP (Internet Protocol) address and other information. On the other hand, based on the programmable features of the FPGA accelerators, we set FPGA registers as use status bits, which can control different working status of accelerator. Specifically, when the accelerators has been assigned, we also need upload the deadline of usage to it. Finally, the software activity process of the entire trusted edge cloud system is described in detail, including the process of generating authorized use code. Simulation results show that the edge cloud computing mechanism based on FPGA cluster is proved to be trusted and effective.

Published
2020

18. Design of building equipment Internet of things system based on blockchain technology

Author

Leilei Pan, Wang Yanwei, Guiqing Zhang, and Xiaoqian Liu

Subjects
020203 distributed computing, Blockchain, business.industry, Computer science, Multi-agent system, Data security, 020206 networking & telecommunications, 02 engineering and technology, Computer security, computer.software_genre, Reliable transmission, Order (business), 0202 electrical engineering, electronic engineering, information engineering, Internet of Things, business, computer
Abstract

At present, with the rapid development of Internet of things technology, there are more and more intelligent devices connected to the Internet of things, which are faced with many problems such as unsafe data, easy disclosure of privacy and difficult sharing of data. In order to solve these problems, this paper proposes a flat and center-less building equipment Internet of things system based on blockchain technology, so as to better realize accurate perception, reliable transmission and intelligent processing of the Internet of things. The application of blockchain technology and Internet of things technology in intelligent buildings ensures data security, improves system operation efficiency and provides a new method to solve the problems of Internet of things.

Published
2019

26. Characteristic properties of High Consistency Rubber and Liquid Silicone Rubber

Author

Masoud Farzaneh, Liu Tianqi, Guo Jingang, Ying Lin, Wang Yanwei, Fanghui Yin, and Liming Wang

Subjects
Thermogravimetric analysis, Tear resistance, Materials science, Vulcanization, Dynamic mechanical analysis, Silicone rubber, law.invention, chemistry.chemical_compound, Natural rubber, chemistry, law, visual_art, Ultimate tensile strength, visual_art.visual_art_medium, Thermomechanical analysis, Composite material
Abstract

High temperature vulcanized silicone rubber (HTV) insulators are widely used in power transmission systems due to their excellent mechanical, electrical, and hydrophobic properties. The characteristic properties of materials are of great importance to the safety of power systems. In general, HTV materials are divided into two groups, high consistency rubber (HCR) and liquid silicone rubber (LSR). Mechanical properties (hardness, tensile strength, elongation at break, and tear strength), electrical properties (volume resistivity, relative dielectric constant, dielectric loss tangent, and breakdown strength), hydrophobicity, and low molecular weight silicones (LMWs) of HCR and LSR were measured. Thermo gravimetric analysis (TGA) and dynamic thermal mechanical analysis (DMTA) were also performed to analyze the thermal stability and cold resistance of these two materials. In addition, the groups of HCR and LSR were compared by Fourier Transform Infrared Spectrum (FTIR) to explain the differences between the two materials. It was found that LSR was softer and with better tensile properties, electrical properties, temperature resistance, and more LMWs than HCR. However, due to large amount of accumulated charges on the surface, the hydrophobicity of new vulcanized LSR was poor, which could however be improved by grounding and immersing in water. Besides, LSR is more suitable for cold and hot regions.

Published
2018

33. The planning and evaluation method of power system reserve capacity considering risk assessment

Author

Kou Yu, Jiang Jiangfeng, Sun Jibo, Yang Yinguo, Liu Fan, Wang Yanwei, and Bie Zhaohong

Subjects
Engineering, Index (economics), business.industry, 020209 energy, media_common.quotation_subject, 02 engineering and technology, Reliability engineering, Renewable energy, Electric power system, 0202 electrical engineering, electronic engineering, information engineering, Reserve capacity, business, Risk assessment, Function (engineering), Reliability (statistics), Energy (signal processing), media_common
Abstract

Reliability and economy both have influence on the reserve capacity planning of power system. Based on the quantitative risk assessment, this paper analyzes the comprehensive evaluation index of power system reserve by the use of equivalent energy function, and then proposes a fast computing method of reserve capacity balancing reliability with economy. Furthermore, considering renewable energy integration has great impact on the reserve planning and a multi-state renewable power modeling is employed. Finally, on the basis of a real-life power system, three kinds of models are simulated and compared to verify the rationality and feasibility of the proposed method.

Published
2016

37. Data mining technology and its possible applications in city planning

Author

Shi Baohui, Wang Yanwei, and Wu Jian

Subjects
Artificial neural network, Computer science, Urban planning, Fuzzy set, Economic shortage, Data mining, Rough set, Resolution (logic), computer.software_genre, Development theory, Data science, computer, Data warehouse
Abstract

It is very hard to acquire the information what you really want with the accumulation of large amount of data. Data mining technology has been achieved a great progress with the rapid development of computer science, artificial intelligence, and warehouse. City planning is a job with strong subjective which promotes the development of digital city planning. This makes an increasing demand of data mining technology in areas of digital city planning. This paper described the history and theory development of data mining technologies, especially, rough set whose chief advantage is that it does not need any preliminary or additional information about data. Then some successful applications of rough set were introduced. Furthermore, merits and shortages of some data mining techniques such as rough sets, fuzzy sets, and neural networks were discussed. Finally, the problems faced by city designers were addressed and the possible resolution was also presented.

Published
2010

40. A Survey on Peer-to-Peer Streaming System's Neighbor Number

Author

Ju Liu, Wang Yanwei, Ren Zhenfeng, and Fenglin Qin

Subjects
Distribution (number theory), Computer science, business.industry, Theory model, Bandwidth (signal processing), Topology (electrical circuits), Peer-to-peer, computer.software_genre, Video quality, Probability model, Server, Data mining, business, computer, Computer network
Abstract

In this paper, we describe a probability model to analyze the effect of neighbor number size based on two performance metrics: video quality and distribution delay. Some simulation is done to prove the theory model. The theoretical analysis and the simulation both show that increasing the neighbor number size does little to the system video quality when the buffer size is large enough, but can reduce the distribution delay of chunk effectively

Published
2009

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