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Hybrid genetic-paired-permutation algorithm for improved VLSI placement

Ignatyev, Vladimir V.,Kovalev, Andrey V.,Spiridonov, Oleg B.,Kureychik, Viktor M.,Ignatyeva, Alexandra S.,Safronenkova, Irina B. Electronics and Telecommunications Research Instit 2021 ETRI Journal Vol.43 No.2
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  ScienceON
  
  KCI
This paper addresses Very large-scale integration (VLSI) placement optimization, which is important because of the rapid development of VLSI design technologies. The goal of this study is to develop a hybrid algorithm for VLSI placement. The proposed algorithm includes a sequential combination of a genetic algorithm and an evolutionary algorithm. It is commonly known that local search algorithms, such as random forest, hill climbing, and variable neighborhoods, can be effectively applied to NP-hard problem-solving. They provide improved solutions, which are obtained after a global search. The scientific novelty of this research is based on the development of systems, principles, and methods for creating a hybrid (combined) placement algorithm. The principal difference in the proposed algorithm is that it obtains a set of alternative solutions in parallel and then selects the best one. Nonstandard genetic operators, based on problem knowledge, are used in the proposed algorithm. An investigational study shows an objective-function improvement of 13%. The time complexity of the hybrid placement algorithm is O(N2).
2
한국어 거절 화행에 대한 중국인 학습자와 러시아인 학습자의 인식 연구

강경민(Kyongmin Kang),김은진(Eunjin Kim),서만(Man Xu),옥사나(Ignatyeva Oxana),이다연(Dayeon Lee)이명봉(Mingfeng Li) 국제한국어교육문화재단 2017 국제한국어교육 Vol.3 No.1
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The purpose of this study is to analyze Korean refusal speech acts in various situations and contexts and to clarify Korean language cultural characteristics and their communicational components. Besides, by collecting and analyzing refusal expressions of Chinese speaking Korean learners and Russian speaking Korean learners in given situations, we tried to understand Chinese and Russian language cultural characteristics from a cross-cultural point of view. The result of this study can be utilized as fundamental materials for textbooks or data for explanation, references for discussion. Refusal is to express the willingness to ignore the other’s suggestion or to turn down the other’s request. It can be offensive sometimes. Therefore refusal is often conducted through special language strategies or certain expressions. Koreans’ refusal speech acts are also often performed without clear expression of refusals. Because of this many foreign learners have experienced the actual failure in communications with Korean native speakers even though they have reached high level of Korean language competence. This kind of communicational failure is not because they do not know certain supposition expressions nor certain interrogative expressions. Misunderstanding of Korean language culture and transferring their own pragmatic knowledge into the speaking situation in Korea bring communication failure. We think that the fundamental solution for this kind of problem is to let foreign students understand language culturalmechanism working in Korean refusal speech acts. To extract the language cultural characteristics of Korean refusal speech acts we designed a set of DCT and developed structured interview questions. We conducted these surveys of Korean native speakers, Chinese speaking learners and Russian speaking learners. As a result, we could deduce 5 Korean language cultural characteristics from refusal speech acts, which are modesty, grant, bond, face, sympathy. And also we could notice that China has similar language culture from Korean while Russians show quite different features in terms of directness, politeness and clearness.This study can be used as basic materials for textbooks or explanatory data, references for discussions, hopefully.