• Title/Summary/Keyword: Performance conversion

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Interpolation Error Concealment Method of Motion Compensated Interpolated Frame for Motion Compensated Frame Rate Conversion (움직임 보상 프레임 율 변환 기법을 위한 움직임 보상 보간 프레임의 보간 오류 은닉 기법)

  • Lee, Jeong-Hun;Han, Dong-Il
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.927-928
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    • 2008
  • In this paper, a interpolation error concealment algorithm of motion compensated interpolated frame for motion compensated frame rate conversion to reduce the block artifacts caused by failure of conventional motion estimation based on block matching algorithm is proposed. Experimental results show good performance of the proposed scheme with significant reduction of the block artifacts.

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A Large Trans/cis Conversion Ratio In Redox-Conjugated Single-Light Reversible Isomerization of a Cobalt Complex with meta-Bipyridylazobenzene Ligands

  • Kume, Shoko;Kurihara, Masato;Nishihara, Hiroshi
    • Journal of the Korean Electrochemical Society
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    • v.5 no.4
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    • pp.189-191
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    • 2002
  • Reversible trans-cis isomerization of meta-bipyridylazobenzene coordinated to cobalt was achieved by a combination of photoirradiation with a single UV light source and a Co(II)/Co(III) redox reaction. The trans/cis conversion performance was significantly improved in the meta-form compared with the meta-form ligated to cobalt.

Frame Rate Up-Conversion Using the Motion Vector Correction based on Motion Vector Frequency of Neighboring blocks (주변 블록의 움직임 벡터 빈도수에 기반한 움직임 벡터 교정을 적용한 프레임 율 변환 기법)

  • Lee, Jeong-Hun;Han, Dong-Il
    • Proceedings of the IEEK Conference
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    • 2007.07a
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    • pp.259-260
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    • 2007
  • In this paper, a frame rate up-conversion algorithm using the motion vector frequency of neighboring blocks to reduce the block artifacts caused by failure of conventional motion estimation based on block matching algorithm is proposed. Experimental results show good performance of the proposed scheme with significant reduction of the erroneous motion vectors and block artifacts.

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Optimization of Color Format Conversion of WebCam Images Using the CUDA (CUDA를 이용한 웹캠 영상의 색상 형식 변환 최적화)

  • Kim, Jin-Woo;Jung, Yun-Hye;Park, Jin-Hong;Park, Yong-Jin;Han, Tack-Don
    • Journal of Korea Game Society
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    • v.11 no.1
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    • pp.147-157
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    • 2011
  • Webcam doesn't perform memory-alignment in order to reduce the transmission time of image data. Memory-unaligned image data is unsuitable for the processing on GPU. Accordingly, we convert it to available color format for optimization in high speed image processing. In this paper, we propose a technique that accelerates webcam's color format conversion by using NVDIA CUDA. We propose an optimization which is about memory accesses and thread composition, also evaluate memory and computing performance for verifying a hypothesis which is the performance of the proposed architecture and optimizing degree on low-performance GPU. Following the optimization technique, we show performance improvements over maximum 68 percent.

COMPARATIVE PERFORMANCE OF BROILER CHICKS ON COMMERCIAL AND CORN-SOYBEAN MEAL BASED RATIONS

  • Ali, A.;Azim, A.;Zahid, S.;Rasool, Z.;Rehman, K.U.
    • Asian-Australasian Journal of Animal Sciences
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    • v.6 no.1
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    • pp.115-122
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    • 1993
  • A study was conducted to compare the effect of feeding commercial formula ration and corn-soybean meal based rations on growth performance, feed conversion ratio, mortality percentage, dressing percentage, carcass composition and economics of raising broiler chicks at commercial farms. 3000 day old broiler chicks were randomly divided into 4 groups with 3 replicates of 250 birds in each. Four iso-nitrogenous and isocaloric rations (A, B, C and D) were prepared and randomly allotted to each group. Ration A was a commercial broiler ration whereas ration B had the same formula with the exception that all the animal protein sources were replaced with soybean meal (SBM). Ration C was based on only corn and SBM. Ration D contained corn, SBM and 25% fullfat soybean (FFSB). The birds were given the experimental rations starter from day 1 to 28 and finisher from 29 to 49. The results indicated that the birds fed on corn-soybean meal based rations gained significantly figher weights showed better feed conversion ratio, gave higher dressing percentage with better carcass composition, lower mortality and higher net profits as compared to those fed on commercial ration. The replacement of animal protein sources in commercial ration with SBM (ration B) although did not show any significant differences in the performance of birds as compared to ration A, a little improvement was visible indicating that SBM can be used as a good substitute of animal protein sources. Similarly the replacement of SBM with FFSB up to a level of 25% did not affect the broiler performance as compared to only SBM.

Power Generation Efficiency Model for Performance Monitoring of Combined Heat and Power Plant (열병합발전의 성능 모니터링을 위한 발전효율 모델)

  • Ko, Sung Guen;Ko, Hong Cheol;Yi, Jun Seok
    • Plant Journal
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    • v.16 no.4
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    • pp.26-32
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    • 2020
  • The performance monitoring system in the power plant should have the capability to estimate power generation efficiency accurately. Several power generation efficiency models have been proposed for the combined heat and power (CHP) plant which produces both electricity and process steam(or heating energy, hereinafter expressed by process steam only). However, most of the models are not sufficiently accurate due to the wrong evaluation of the process steam value. The study suggests Electricity Conversion Efficiency (ECE) model with determination of the heat rate of process steam using operational data. The suggested method is applied to the design data and the resulted trajectory curve of power generation efficiency meets the data closely with R2 99.91%. This result confirms that ECE model with determination of the model coefficient using the operational data estimate the efficiency so accurately that can be used for performance monitoring of CHP plant.

Analysis of the Construction Cost Prediction Performance according to Feature Scaling and Log Conversion of Target Variable (피처 스케일링과 타겟변수 로그변환에 따른 건축 공사비 예측 성능 분석)

  • Kang, Yoon-Ho;Yun, Seok-Heon
    • Journal of the Korea Institute of Building Construction
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    • v.22 no.3
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    • pp.317-326
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    • 2022
  • With the development of various technologies in the area of artificial intelligence, a number of studies to application of artificial intelligence technology in the construction field are underway. Diverse technologies have been applied to the task of predicting construction costs, and construction cost prediction technologies applying artificial intelligence technologies have recently been developed. However, it is difficult to secure the vast amount of construction cost data required for machine learning, which has not yet been practically used. In this study, to predict the construction cost, the latest artificial neural network(ANN) method is used to propose a method to improve the construction cost prediction performance. In particular, to improve predictive performance, a log conversion method of target variables and a feature scaling method to eliminate the difference in the relative influence of each column data are applied, and their performance in predicting construction cost is compared and analyzed.

Performance Evaluation for Fast Conversion from Urea to an Ammonia Conversion Technology with a Plasma Burner (플라즈마 버너를 적용한 요소수에서 암모니아로의 고속 전환 기술 성능 평가)

  • Jo, Sungkwon;Kim, Kwan-Tae;Lee, Dae Hoon;Song, Young-Hoon
    • Journal of Korean Society for Atmospheric Environment
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    • v.32 no.5
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    • pp.526-535
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    • 2016
  • Recently, fine dust in atmosphere have been considerably issued as a harmful element for human. Nitrogen oxide ($NO_x$) exhausted from diesel engines and power plants has been disclosed as a main source of secondary production of fine dust. In order to prevent exhausting these nitrogenous compounds into atmosphere, a treatment system with selective catalytic reduction (SCR) catalyst with ammonia as a reductant has been used in various industries. Urea solution has been widely studied to supply ammonia into a SCR catalytic reactor, safely. However, the conversion of urea solution to ammonia has several challenges, especially on a slow conversion velocity. In the present study, a fast urea conversion system including a plasma burner was suggested and designed to evaluate the performances of urea conversion and initial operation time. A designed lab-scale facility has a plasma burner, urea nozzle, mixer, and SCR catalyst which is for hydrolysis of isocyane. Flow rate of methane that is a fuel of the plasma burner was varied to control temperatures in the urea conversion facility. From experimental results, it is found that urea can be converted into ammonia using high temperature condition of above $400^{\circ}C$. In the designed test facility, it is found that ammonia can be produced within 1 min from urea injection and the result shows prospect commercialization of proposed technology in the SCR facilities.

Effects of Operating Variables on CO Conversion of WGS Catalyst in a Fluidized Bed Reactor Equipped with Bed Insert (내부 삽입물을 적용한 유동층 반응기에서 WGS 촉매의 CO 전화율에 미치는 조업변수들의 영향)

  • Park, Jihye;Lee, Dongho;Park, Youngeheol;Moon, Jongho;Rhee, Youngwoo;Ryu, Hojung
    • Journal of Hydrogen and New Energy
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    • v.25 no.2
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    • pp.209-217
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    • 2014
  • To enhance the performance of SEWGS system by holding the WGS catalyst in a SEWGS reactor, a spring type bed insert was developed. In this study, effects of operating variables such as steam/CO ratio, gas velocity, syngas concentration on CO conversion were investigated in a fluidized bed reactor using the spring type bed insert to hold the WGS catalyst as tablet shape. CO conversion increased initially as the steam/CO ratio increased. But further increment of the steam/CO ratio caused decreasing of CO conversion because of increment of gas velocity and decrement of syngas concentration. Moreover, CO conversion decreased as the gas velocity increased and the syngas concentration decreased at the same steam/CO ratio. Continuous operation up to 48 hours (2 days) was carried out to check reactivity decay of WGS catalyst supported by spring type bed insert. The average CO conversion was 99.04% and we could conclude that the WGS reactivity at those conditions was maintained up to 48 hours.

Effect of Operating Condition Change on the Conversion Efficiency of TWC with HCNG Engine (운전조건 변화가 HCNG 엔진용 삼원촉매 전환효율에 미치는 영향)

  • Kim, Chang-Gi;Lee, Sung-Won;Yi, Ui-Hyung;Park, Cheol-Woong;Lee, Sun-Youp;Choi, Young;Lee, Jang-Hee
    • Journal of the Korean Institute of Gas
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    • v.19 no.6
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    • pp.40-46
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    • 2015
  • Stoichiometric combustion engine with Three-way catalyst had an advantage that can reduce the harmful emissions effectively. Fuel equivalence ratio controlled from engine is very important because Fuel equivalence ratio with high conversion efficiency was narrow. This study analyzed the conversion efficiency under whole range of operating area for to evaluate the performance of three-way catalyst. In order to identify the Optimum conversion efficiency, the conversion efficiency due to change the control value of fuel equivalence ratio was investigated. The result show that conversion efficiency of emissions(more than 95%) has discovered by means of fuel equivalence ratio control at each test condition. As engine power increases, optimal fuel equivalence ratio tended to increase linearly under operating conditions of similar exhaust gas temperature.