The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Xie Zhiming - One of the best experts on this subject based on the ideXlab platform.
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gray level value Natural Logarithm ratio neighborhood filters method for image denoising
Journal of Computer Applications, 2009Co-Authors: Xie ZhimingAbstract:A new method based on gray-level value Natural Logarithm ratio neighborhood filters was presented for image de-noising.Starting from the present neighborhood filters model,the denoising principles and the existing problem of the gray-level value in normalization factor were analyzed.As a solution,a new gray-level value Natural Logarithm ratio range filter kernel was pointed out for the Bilateral filtering,a representative method of Neighborhood filters.The new gray-level value Natural Logarithm ratio Bilateral Neighborhood filtering method can not only well restrain noise but also keep weak edges and details of an image as many as possible,and preserve the original color transition of color images.Experimental results show that the effectiveness for image de-noising of the new method is better.
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A Gray-Natural Logarithm Ratio Neighborhood Filters Method for Biomedical Image Denoising
2008 2nd International Conference on Bioinformatics and Biomedical Engineering, 2008Co-Authors: Chen Guannan, Xie Zhiming, Chen Rong, Chen Jianxin, Huang Zufang, Feng Shangyuan, Li Yongzeng, Yang KuntaoAbstract:Denoising biomedical images can be completed by a spatial averaging of nearby pixels. Neighborhood filters are usually preferred. In this paper, we perform an analysis of neighborhood filters where the size of the gray Euclidean distance is small. We prove that the weak edges and details are smoothed and the gray level transition tends to become mild filtering with these neighborhood filters. As a solution, we propose a gray-Natural Logarithm ratio bilateral neighborhood filter. The new gray-Natural Logarithm ratio bilateral neighborhood filter method can not only well restrain noise but also keep much more weak edges and details of a biomedical image, and preserve the original gray level transition of gray level images. Experimental results show that the effectiveness for biomedical image denoising with our method is better.
Ivonne M.c.m. Rietjens - One of the best experts on this subject based on the ideXlab platform.
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Quantitative structure activity relationships for the electron transfer reactions of Anabaena PCC 7119 ferredoxin-NADP+ oxidoreductase with nitrobenzene and nitrobenzimidazolone derivatives: mechanistic implications.
FEBS letters, 1999Co-Authors: Zilvinas Anusevicius, A.e.m.f. Soffers, Narimantas Cenas, Jonas Šarlauskas, Marta Martínez-júlvez, Ivonne M.c.m. RietjensAbstract:The steady state single electron reduction of polynitroaromatics by ferredoxin-NADP+ oxidoreductase (EC 1.18.1.2) from cyanobacterium Anabaena PCC 7119 has been studied and quantitative structure activity relationships are described. The solubility of the polynitroaromatics as well as their reactivity towards ferredoxin-NADP+ oxidoreductase are markedly higher than those for previously studied mononitroaromatics and this enabled the independent measurement of the kinetic parameters-k(cat) and Km. Interestingly, the Natural Logarithm of the bimolecular rate constant, k(cat)/Km, and also the Natural Logarithm of k(cat) correlate with the calculated energy of the lowest unoccupied molecular orbital of the polynitroaromatic substrates. The minimal kinetic model in line with these quantitative structure activity relationships is a ping-pong mechanism which includes substrate binding equilibria in the second half reaction.
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Quantitative structure activity relationships for the electron transfer reactions of Anabaena PCC 7119 ferredoxin‐NADP+ oxidoreductase with nitrobenzene and nitrobenzimidazolone derivatives: mechanistic implications
FEBS Letters, 1999Co-Authors: Zilvinas Anusevicius, A.e.m.f. Soffers, Narimantas Cenas, Jonas Šarlauskas, Marta Martínez-júlvez, Ivonne M.c.m. RietjensAbstract:Abstract The steady state single electron reduction of polynitroaromatics by ferredoxin-NADP+ oxidoreductase (EC 1.18.1.2) from cyanobacterium Anabaena PCC 7119 has been studied and quantitative structure activity relationships are described. The solubility of the polynitroaromatics as well as their reactivity towards ferredoxin-NADP+ oxidoreductase are markedly higher than those for previously studied mononitroaromatics and this enabled the independent measurement of the kinetic parameters kcat and Km. Interestingly, the Natural Logarithm of the bimolecular rate constant, kcat/Km, and also the Natural Logarithm of kcat correlate with the calculated energy of the lowest unoccupied molecular orbital of the polynitroaromatic substrates. The minimal kinetic model in line with these quantitative structure activity relationships is a ping-pong mechanism which includes substrate binding equilibria in the second half reaction.
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Quantitative structure activity relationships for the conversion of nitrobenzimidazolones and nitrobenzimidazoles by DT-diaphorase: implications for the kinetic mechanism
FEBS Letters, 1998Co-Authors: Zilvinas Anusevicius, A.e.m.f. Soffers, Narimantas Cenas, Jonas Šarlauskas, Juan Segura-aguilar, Ivonne M.c.m. RietjensAbstract:Abstract Quantitative structure activity relationships (QSARs) for the conversion of nitrobenzimidazolones and nitrobenzimidazoles by rat liver DT-diaphorase (EC 1.6.99.2) are described. The parameter used for description of the QSARs is the energy of the lowest unoccupied molecular orbital (E(LUMO)) of the nitroaromatic compounds. Interestingly, correlations with E(LUMO) were observed for both the Natural Logarithm of kcat, but also for the Natural Logarithm of kcat/Km. The minimal kinetic model in line with these QSARs is a ping-pong mechanism that includes a substrate binding equilibrium in the second half reaction.
Fadly Jashi Darsivan - One of the best experts on this subject based on the ideXlab platform.
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ICARCV - Natural Logarithm sliding mode control (ln-SMC) using EMRAN for active engine mounting system
2010 11th International Conference on Control Automation Robotics & Vision, 2010Co-Authors: Andika Aji Wijaya, R. Akmeliawati, Wahyudi, Fadly Jashi DarsivanAbstract:Robustness of the controller becomes major important factor in active engine mounting system to ensure the vibration of the engine can be attenuated in entire range of operating speed. As robustness is the main advantage of sliding mode control, it has been proposed for vibration control applications. However, most of the proposed sliding mode control are using linear sliding surface. In addition, there is no schematic method to determine the optimum sliding function. In this paper, Natural Logarithm-based sliding function is introduced. By its nature, Natural Logarithm function is nonlinear function. Since it consists of one parameter only, which is related to maximum allowable vibration level, it is more easily to be determined by the designer. Moreover, the advantage of fast on-line training using Extended Minimum Resource Allocating Network (EMRAN) algorithm, made it possible to design feedback control law without having to obtain the precise system model which is normally becomes major difficulties of sliding mode approach.
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Natural Logarithm sliding mode control (ln-SMC) using EMRAN for active engine mounting system
2010 11th International Conference on Control Automation Robotics & Vision, 2010Co-Authors: Andika Aji Wijaya, R. Akmeliawati, Fadly Jashi DarsivanAbstract:Robustness of the controller becomes major important factor in active engine mounting system to ensure the vibration of the engine can be attenuated in entire range of operating speed. As robustness is the main advantage of sliding mode control, it has been proposed for vibration control applications. However, most of the proposed sliding mode control are using linear sliding surface. In addition, there is no schematic method to determine the optimum sliding function. In this paper, Natural Logarithm-based sliding function is introduced. By its nature, Natural Logarithm function is nonlinear function. Since it consists of one parameter only, which is related to maximum allowable vibration level, it is more easily to be determined by the designer. Moreover, the advantage of fast on-line training using Extended Minimum Resource Allocating Network (EMRAN) algorithm, made it possible to design feedback control law without having to obtain the precise system model which is normally becomes major difficulties of sliding mode approach.
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intelligent sliding mode control using Natural Logarithm sliding surface
2010Co-Authors: Ridhuan Siradj, Fadly Jashi DarsivanAbstract:In automotive, engine mount is a component used to support the car engine on the chassis and at the same time isolates engine vibration. Ideally engine mount system should isolate engine vibration caused by engine disturbance force in engine speed range and prevent engine bounce from shock excitation. Nowadays, active engine mounting system has been considered as the next generation of engine mounts.
R. Akmeliawati - One of the best experts on this subject based on the ideXlab platform.
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ICARCV - Natural Logarithm sliding mode control (ln-SMC) using EMRAN for active engine mounting system
2010 11th International Conference on Control Automation Robotics & Vision, 2010Co-Authors: Andika Aji Wijaya, R. Akmeliawati, Wahyudi, Fadly Jashi DarsivanAbstract:Robustness of the controller becomes major important factor in active engine mounting system to ensure the vibration of the engine can be attenuated in entire range of operating speed. As robustness is the main advantage of sliding mode control, it has been proposed for vibration control applications. However, most of the proposed sliding mode control are using linear sliding surface. In addition, there is no schematic method to determine the optimum sliding function. In this paper, Natural Logarithm-based sliding function is introduced. By its nature, Natural Logarithm function is nonlinear function. Since it consists of one parameter only, which is related to maximum allowable vibration level, it is more easily to be determined by the designer. Moreover, the advantage of fast on-line training using Extended Minimum Resource Allocating Network (EMRAN) algorithm, made it possible to design feedback control law without having to obtain the precise system model which is normally becomes major difficulties of sliding mode approach.
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Natural Logarithm sliding mode control (ln-SMC) using EMRAN for active engine mounting system
2010 11th International Conference on Control Automation Robotics & Vision, 2010Co-Authors: Andika Aji Wijaya, R. Akmeliawati, Fadly Jashi DarsivanAbstract:Robustness of the controller becomes major important factor in active engine mounting system to ensure the vibration of the engine can be attenuated in entire range of operating speed. As robustness is the main advantage of sliding mode control, it has been proposed for vibration control applications. However, most of the proposed sliding mode control are using linear sliding surface. In addition, there is no schematic method to determine the optimum sliding function. In this paper, Natural Logarithm-based sliding function is introduced. By its nature, Natural Logarithm function is nonlinear function. Since it consists of one parameter only, which is related to maximum allowable vibration level, it is more easily to be determined by the designer. Moreover, the advantage of fast on-line training using Extended Minimum Resource Allocating Network (EMRAN) algorithm, made it possible to design feedback control law without having to obtain the precise system model which is normally becomes major difficulties of sliding mode approach.
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Natural Logarithm based sliding mode control for two dof active engine mounting system
International Conference on Instrumentation Communications Information Technology and Biomedical Engineering, 2009Co-Authors: A. W. Andika, J. D. Fadly, R. AkmeliawatiAbstract:The needs of powerful engine and lighter car body has adverse effect to the vibration occurred in the car. Obviously the presence of the engine vibration will imposed to the discomfort of the driver and passengers as well. To isolate the vibration, Active Engine Mounting (AEM) has been proposed as the new generation of engine mounting. The control method becomes key factor of successfulness of AEM system. This paper presents a control method using Natural Logarithm-based Sliding Mode Control (ln-SMC) for two degree-of-freedom (DOF) active engine mounting system. The performance of the controller is evaluated by applying sinusoidal and random disturbance to the system. Robustness of the proposed controller can be evaluated by increasing magnitude of the disturbance. The result shows that proposed control method not only able to attenuate the vibration of the different types of disturbance but also robust for magnitude variation of disturbance.
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Natural Logarithm-based sliding mode control for two DOF active engine mounting system
International Conference on Instrumentation Communication Information Technology and Biomedical Engineering 2009, 2009Co-Authors: A. W. Andika, J. D. Fadly, R. AkmeliawatiAbstract:The needs of powerful engine and lighter car body has adverse effect to the vibration occurred in the car. Obviously the presence of the engine vibration will imposed to the discomfort of the driver and passengers as well. To isolate the vibration, active engine mounting (AEM) has been proposed as the new generation of engine mounting. The control method becomes key factor of successfulness of AEM system. This paper presents a control method using Natural Logarithm-based sliding mode control (ln-SMC) for two degree-of-freedom (DOF) active engine mounting system. The performance of the controller is evaluated by applying sinusoidal and random disturbance to the system. Robustness of the proposed controller can be evaluated by increasing magnitude of the disturbance. The result shows that proposed control method not only able to attenuate the vibration of the different types of disturbance but also robust for magnitude variation of disturbance.
Zilvinas Anusevicius - One of the best experts on this subject based on the ideXlab platform.
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Quantitative structure activity relationships for the electron transfer reactions of Anabaena PCC 7119 ferredoxin-NADP+ oxidoreductase with nitrobenzene and nitrobenzimidazolone derivatives: mechanistic implications.
FEBS letters, 1999Co-Authors: Zilvinas Anusevicius, A.e.m.f. Soffers, Narimantas Cenas, Jonas Šarlauskas, Marta Martínez-júlvez, Ivonne M.c.m. RietjensAbstract:The steady state single electron reduction of polynitroaromatics by ferredoxin-NADP+ oxidoreductase (EC 1.18.1.2) from cyanobacterium Anabaena PCC 7119 has been studied and quantitative structure activity relationships are described. The solubility of the polynitroaromatics as well as their reactivity towards ferredoxin-NADP+ oxidoreductase are markedly higher than those for previously studied mononitroaromatics and this enabled the independent measurement of the kinetic parameters-k(cat) and Km. Interestingly, the Natural Logarithm of the bimolecular rate constant, k(cat)/Km, and also the Natural Logarithm of k(cat) correlate with the calculated energy of the lowest unoccupied molecular orbital of the polynitroaromatic substrates. The minimal kinetic model in line with these quantitative structure activity relationships is a ping-pong mechanism which includes substrate binding equilibria in the second half reaction.
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Quantitative structure activity relationships for the electron transfer reactions of Anabaena PCC 7119 ferredoxin‐NADP+ oxidoreductase with nitrobenzene and nitrobenzimidazolone derivatives: mechanistic implications
FEBS Letters, 1999Co-Authors: Zilvinas Anusevicius, A.e.m.f. Soffers, Narimantas Cenas, Jonas Šarlauskas, Marta Martínez-júlvez, Ivonne M.c.m. RietjensAbstract:Abstract The steady state single electron reduction of polynitroaromatics by ferredoxin-NADP+ oxidoreductase (EC 1.18.1.2) from cyanobacterium Anabaena PCC 7119 has been studied and quantitative structure activity relationships are described. The solubility of the polynitroaromatics as well as their reactivity towards ferredoxin-NADP+ oxidoreductase are markedly higher than those for previously studied mononitroaromatics and this enabled the independent measurement of the kinetic parameters kcat and Km. Interestingly, the Natural Logarithm of the bimolecular rate constant, kcat/Km, and also the Natural Logarithm of kcat correlate with the calculated energy of the lowest unoccupied molecular orbital of the polynitroaromatic substrates. The minimal kinetic model in line with these quantitative structure activity relationships is a ping-pong mechanism which includes substrate binding equilibria in the second half reaction.
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Quantitative structure activity relationships for the conversion of nitrobenzimidazolones and nitrobenzimidazoles by DT-diaphorase: implications for the kinetic mechanism
FEBS Letters, 1998Co-Authors: Zilvinas Anusevicius, A.e.m.f. Soffers, Narimantas Cenas, Jonas Šarlauskas, Juan Segura-aguilar, Ivonne M.c.m. RietjensAbstract:Abstract Quantitative structure activity relationships (QSARs) for the conversion of nitrobenzimidazolones and nitrobenzimidazoles by rat liver DT-diaphorase (EC 1.6.99.2) are described. The parameter used for description of the QSARs is the energy of the lowest unoccupied molecular orbital (E(LUMO)) of the nitroaromatic compounds. Interestingly, correlations with E(LUMO) were observed for both the Natural Logarithm of kcat, but also for the Natural Logarithm of kcat/Km. The minimal kinetic model in line with these QSARs is a ping-pong mechanism that includes a substrate binding equilibrium in the second half reaction.
