• 제목/요약/키워드: maximal clique problem

검색결과 4건 처리시간 0.018초

Maximal Clique Problem을 해결하기 위한 DNA 코딩 방법을 적용한 DNA 컴퓨팅 (DNA Computing Adopting DNA Coding Method to solve Maximal Clique Problem)

  • 김은경;이상용
    • 정보처리학회논문지B
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    • 제10B권7호
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    • pp.769-776
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    • 2003
  • MCP(Maximal Clique Problem)를 해결하기 위해 DNA 컴퓨팅이 사용되고 있다. 그러나 현재의 DNA 컴퓨팅을 MCP에 적용하였을 때, 정점과 간선을 효율적으로 표현할 수 없으며 제한 효소의 잘못된 사용으로 인하여 해를 찾을 수 없는 문제점을 가지고 있다. 본 논문에서는 MCP의 문제점을 해결하기 위해 DNA 컴퓨팅 기법에 DNA 코딩 방법을 적용한 ACO(Algorithm for Code Optimization)를 제안한다. 우리는 ACO를 MCP에 적용하였고, 그 결과 ACO는 Adleman의 DNA 컴퓨팅 알고리즘 보다 가변길이의 DNA 코드를 표현할 수 있으며, 불필요한 정점을 제거한 코드를 생성할 수 있었다. 또한 ACO는 Adleman의 DNA 컴퓨팅 알고리즘 보다 탐색 시간과 생물학적 오류율을 15% 정도 줄임으로써 4배 정도 많은 최종해를 얻을 수 있었다.

Graph coloring problem solving by calculations at the DNA level with operating on plasmids

  • Feng, Xiongfeng;Kubik, K.Bogunia
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2001년도 ICCAS
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    • pp.49.3-49
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    • 2001
  • In 1994 Adelman´s pioneer work demonstrated that deoxyribonucleic acid (DNA) could be used as a medium for computation to solve mathematical problems. He described the use of DNA based computational approach to solve the Hamiltonian Path Problem (HPP). Since then a number of combinatorial problems have been analyzed by DNA computation approaches including, for example: Maximum Independent Set (MIS), Maximal Clique and Satisfaction (SAT) Problems. In the present paper we propose a method of solving another classic combinatorial optimization problem - the eraph Coloring Problem (GCP), using specifically designed circular DNA plasmids as a computation tool. The task of the analysis is to color the graph so that no two nodes ...

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Reduction of the Retransmission Delay for Heterogeneous Devices in Dynamic Opportunistic Device-to-device Network

  • Chen, Sixuan;Zou, Weixia;Liu, Xuefeng;Zhao, Yang;Zhou, Zheng
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제12권10호
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    • pp.4662-4677
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    • 2018
  • The dynamic opportunistic device-to-device (DO-D2D) network will frequently emerge in the fifth generation (5G) wireless communication due to high-density and fast-moving mobile devices. In order to improve the Quality of Experience (QoE) of users with different computing capacity devices in the DO-D2D network, in this paper, we focus on the study of how to reduce the packets retransmission delay and satisfy heterogeneous devices. To select as many devices as possible to transmit simultaneously without interference, the concurrent transmitters-selecting algorithm is firstly put forward. It jointly considers the number of packets successfully received by each device and the device's connectivity. Then, to satisfy different devices' demands while primarily ensuring the base-layer packets successfully received by all the devices, the layer-cooperation instantly decodable network coding is presented, which is used to select transmission packets combination for each transmitter. Simulation results illustrate that there is an appreciable retransmission delay gain especially in the poor channel quality network compared to the traditional base-station (BS) retransmission algorithm. In addition, our proposed algorithms perform well to satisfy the different demands of users with heterogeneous devices.