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Optimization Model of Reliable Data Storage in Cloud Environment Using Genetic Algorithm
Feng Liu,Haitao Wu,Xiaochun Lu,Xiyang Liu 보안공학연구지원센터 2014 International Journal of Grid and Distributed Comp Vol.7 No.6
Massive data storage is one of the great challenges for cloud computing service, and reliable storage of sensitive data directly affects quality of storage service. In this paper, based on analysis of data storage process in cloud environment, the cost of massive data storage is considered to be comprised of data storage price, data migration and communication; and the storage reliability consists of data transmission reliability and hardware dependability. A multi-objective optimization model for reliable massive storage is proposed, in which storage cost and reliability are the objectives. Then, a genetic algorithm for solving the model is designed. Finally, experimental results indicate that the proposed model is positive and effective.
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Parallel Distributed Acceleration Based on MPI and OpenMP Technology
Feng Liu,Haitao Wu,Xiaochun Lu,Xiyang Liu 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.6
In order to speed up data processing in a signal monitoring and evaluation system, we need to use a parallel method. It is obvious that the traditional stand-alone store has no ability to satisfy the performance requirements, and the use of single core CPU is unable to content the severe requirement of speed. Consequently, multi-machine parallel acceleration technique based on MPI (cooperated with multi-core parallel acceleration technique based on OpenMP) can effectively solve all above problems. In this paper, a parallel distributed acceleration framework based on MPI and Open MP technology was given. Experimental tests were carried to verify our proposal. Finally, some suggestions to speed up the data processing was given.
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Nie, Haitao,Wang, Ziyu,You, Jihao,Zhu, Gang,Wang, Hengchang,Wang, Feng Asian Australasian Association of Animal Productio 2020 Animal Bioscience Vol.33 No.1
Objective: The effects of Pleurotus ostreatus on the feed utilization of broad bean stalks (BBS), rape straw (RS), paddy straw (PS), and corn stalk (CS) was examined. Methods: The four roughages were co-cultured with Pleurotus ostreatus. The chemical composition; enzyme activities of laccase, carboxymethylcellulase (CMCase) and xylanase; carbohydrate and protein fractions (based on The Cornell Net Carbohydrate and Protein System [CNCPS]) were assessed at different days after inoculation (7, 14, 21, 28 d) and un-inoculated roughages (control, 0 d). The digestibility of nutrient components and the gas production of roughage with various incubation times were monitored at 0, 2, 4, 6, 9, 12, 24, 36, 48, 60, and 72 h using an in vitro ruminal fermentation method. Results: A higher CMCase activity (0.1039 U/mL) and earlier time to peak (14 d) were detected in Pleurotus ostreatus cultured with CS (p<0.05). Significantly, the incubation length-dependent responses of cumulative gas production were observed from 24 to 72 hours post fermentation (p<0.05), and these incubation length-dependent effects on cumulative gas production of PS and CS appeared earlier (24 h) for PS and CS than those (48 h) for BBS and RS (p<0.05). The fast-degradable carbohydrate (CA) content for all four roughages significantly increased over time (p<0.05). Nonetheless, increased degradation efficiency for CA treated with Pleurotus ostreatus was detected at both 21 and 28 days of incubation (p<0.05). With the exception of PS (p<0.05), there were no significant difference among the roughages (p>0.05) in slowly-degradable carbohydrate (CB2) at different incubation times (p<0.05). Conclusion: Assessment of the alterations in chemical composition, CNCPS system fractions, and the fermentation kinetics after biological pretreatment may yield a valuable database for evaluating the biological pretreatment of Pleurotus ostreatus in ruminant feed.
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Xiaoju Liu,Haitao Feng,Yang Li,Xiaoyan Ma,Fang Chen,Qilong Yan 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
Three novel ferrocene-based hydrazone energetic transition-metal complexes denoted as M/E-FcDz-TMCs (M = Co (II), Fe (III), and Co(II)Fe(III)), were successfully prepared to improve the thermal decompositionof ammonium perchlorate (AP) and anti-migration performance of Fc-based catalysts. 1-hydrazinoethylene-ferrocene (E-FcDz) with unique electronic structure and energy bonds (C@N, NAN)as ligand reacted with transition metal Co, or Fe mono-metal nodes, and Co-Fe bimetal nodes, respectively. The chemical structure, crystalline texture, and morphology were confirmed, and the catalytic performancewas investigated. The thermal decomposition kinetics were estimated by applying Kissinger,FWO, and KAS methods. The results revealed that M/E-FcDz-TMCs had superior catalytic performancesfor AP decomposition compared to the traditional catalyst catocene due to their high electron transportcapacity. Especially, CoFe/E-FcDz-TMCs showed the best catalytic efficiency due to the hybridizationbetween Co (II) 3d and Fe (III) 3d orbitals in the structure led to electron redistribution, driving the optimalsynergistic catalytic effect of the bimetal Co-Fe nodes and E-FcDz, and further enhancing catalysis forAP. Moreover, AP/CoFe/E-FcDzTMCs showed the best combustion performance. In addition, the thermaldecomposition products of AP were explored by TG/FTIR, and the AP thermal decomposition processcould be explained by a possible mechanism following the principle of electron transfer theory.
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양한승 ( Yang Han Seung ),이비 ( Li Fei ),풍해도 ( Feng Haitao ),황진 ( Hwang Jin ) 한국스포츠심리학회 2021 한국스포츠심리학회지 Vol.32 No.2
목적: 이 연구는 프로농구선수들이 시합상황에서 경험하는 ‘농구 몰입’에 대한 심층적인 정보를 제공하는 것이다. 방법: 프로농구선수 11명을 대상으로 몰입 상황, 몰입 전 또는 순간에 대한 느낌, 몰입 이후 필수요소 등의 질문을 통해 심층 면담을 실시하고 귀납적 내용분석을 통해 결과를 도출하였다. 결과: 몰입발생 이전과 몰입 진입 단계에서 경기 전에 나타나는 몰입 단서를 통해 몰입의 전조 증상을 진술했으며 이를 통해 플레이에 보다 집중하는 것으로 나타났다. 몰입경험 중에는 몰입상황을 통제할 수 없었으며 시합상황 파악, 상대 움직임 예측, 완벽한 컨디션 그리고 시간의 변형 같은 몰입을 경험하는 것으로 나타났다. 몰입결과 단계에서는 시합 영상분석을 통해 몰입 유지 및 재정비를 하는 것으로 나타났으며, 부상 통증을 잊고 경기에 뛰거나, 몰입경험의 놀라움 반응 등의 몰입의 특별함이 진술되었다. 결론: 이상의 결과를 바탕으로 몰입상황을 유지하고 적응하기 위해서 자기 수행에 긍정적인 요소들이 활성화 되어야하며, 더 많은 경험을 추구할 수 있는 충분한 기회의 제공 여건이 마련되어야 할 것이다. Purpose: The purpose of this study was to provide in-depth information on ‘basketball flow’ that professional basketball players experience in real game situations. Methods: 11 professional basketball players were given in-depth interviews based on questions about flow situations, their feelings before and at the moment of flow, and the essential factors after flow. The results were derived from inductive contents analysis. Results: The results of the study said that before flow and at the beginning of flow, players stated signs of flow through the clues to flow occurring before games and those signs helped players to pay more attention to games. The results also said that players couldn’t control flow situation but experienced flow such as the grasp of the game situation, the prediction about the opponents, perfect condition, and the transformation of time. At the stage of flow result, players were provided with self-regulatory feedback through analysis of video images of the game and they stated reactions of surprise about their flow experiences like finishing games without recognizing their pain from injury. Besides, players’ mood states, routine, feelings of achievement, and their relations with coaches were mentioned. Conclusion: Discussions were made based on results and more follow-up research on professional sport players’ flow was suggested.
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