The Experts below are selected from a list of 1230 Experts worldwide ranked by ideXlab platform
Nong Zhang - One of the best experts on this subject based on the ideXlab platform.
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an interval uncertain optimization method for vehicle suspensions using chebyshev metamodels
Applied Mathematical Modelling, 2014Co-Authors: Jinglai Wu, Yunqing Zhang, Nong ZhangAbstract:This paper proposes a new design optimization framework for suspension systems considering the kinematic characteristics, such as the camber angle, caster angle, kingpin inclination angle, and toe angle in the presence of uncertainties. The coordinates of rear inner hardpoints of upper control arm and lower control arm of double wishbone suspension are considered as the design variables, as well as the uncertain parameters. In this way, the actual values of the design variables will vary surrounding their nominal values. The variations result in uncertainties that are described as interval variables with lower and upper bounds. The kinematic model of the suspension is developed in software ADAMS. A high-order response surface model using the zeros of Chebyshev polynomials as sampling points is established, termed as Chebyshev metamodel, to approximate the kinematic model. The Chebyshev meta-model is expected to provide higher approximation accuracy. Interval uncertain optimization problems usually involve a nested computationally expensive double-loop optimization process, in which the inner loop optimization is to calculate the bounds of the interval design functions, while the outer loop is to search the optimum for the deterministic optimization problem. To reduce the computational cost, the interval arithmetic is introduced in the inner loop to improve computational efficiency without compromising numerical accuracy. The numerical results show the effectiveness of the proposed design method.
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An interval uncertain optimization method for vehicle suspensions using Chebyshev metamodels
Applied Mathematical Modelling, 2014Co-Authors: Jinglai Wu, Yunqing Zhang, Zhen Luo, Nong ZhangAbstract:This paper proposes a new design optimization framework for suspension systems considering the kinematic characteristics, such as the camber angle, caster angle, kingpin inclination angle, and toe angle in the presence of uncertainties. The coordinates of rear inner hardpoints of upper control arm and lower control arm of double wishbone suspension are considered as the design variables, as well as the uncertain parameters. In this way, the actual values of the design variables will vary surrounding their nominal values. The variations result in uncertainties that are described as interval variables with lower and upper bounds. The kinematic model of the suspension is developed in software ADAMS. A high-order response surface model using the zeros of Chebyshev polynomials as sampling points is established, termed as Chebyshev metamodel, to approximate the kinematic model. The Chebyshev meta-model is expected to provide higher approximation accuracy. Interval uncertain optimization problems usually involve a nested computationally expensive double-loop optimization process, in which the inner loop optimization is to calculate the bounds of the interval design functions, while the outer loop is to search the optimum for the deterministic optimization problem. To reduce the computational cost, the interval arithmetic is introduced in the inner loop to improve computational efficiency without compromising numerical accuracy. The numerical results show the effectiveness of the proposed design method. © 2014 Elsevier Inc.
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Study on steering wheel shimmy with clearance of kingpin
International Journal of Vehicle Noise and Vibration, 2013Co-Authors: Bing Zhou, Nong ZhangAbstract:The non-linear factors of tyre lateral force and contact-impact force of kingpin clearance are considered in this paper. They are brought in the shimmy model by the tyre magic formula and dynamic model of a two-state clearance mechanism. The non-linear mathematical model of steering wheel shimmy with non-independent suspension is established by using Lagrange equation method. And the influences of different initial incentives and parameters are numerically investigated. The simulation results indicate that the clearance of kingpin can increase the amplitude of steering wheel shimmy, the speed range become larger, and the non-sensitive parameters may have an impact on the steering wheel shimmy.
Jinglai Wu - One of the best experts on this subject based on the ideXlab platform.
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an interval uncertain optimization method for vehicle suspensions using chebyshev metamodels
Applied Mathematical Modelling, 2014Co-Authors: Jinglai Wu, Yunqing Zhang, Nong ZhangAbstract:This paper proposes a new design optimization framework for suspension systems considering the kinematic characteristics, such as the camber angle, caster angle, kingpin inclination angle, and toe angle in the presence of uncertainties. The coordinates of rear inner hardpoints of upper control arm and lower control arm of double wishbone suspension are considered as the design variables, as well as the uncertain parameters. In this way, the actual values of the design variables will vary surrounding their nominal values. The variations result in uncertainties that are described as interval variables with lower and upper bounds. The kinematic model of the suspension is developed in software ADAMS. A high-order response surface model using the zeros of Chebyshev polynomials as sampling points is established, termed as Chebyshev metamodel, to approximate the kinematic model. The Chebyshev meta-model is expected to provide higher approximation accuracy. Interval uncertain optimization problems usually involve a nested computationally expensive double-loop optimization process, in which the inner loop optimization is to calculate the bounds of the interval design functions, while the outer loop is to search the optimum for the deterministic optimization problem. To reduce the computational cost, the interval arithmetic is introduced in the inner loop to improve computational efficiency without compromising numerical accuracy. The numerical results show the effectiveness of the proposed design method.
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An interval uncertain optimization method for vehicle suspensions using Chebyshev metamodels
Applied Mathematical Modelling, 2014Co-Authors: Jinglai Wu, Yunqing Zhang, Zhen Luo, Nong ZhangAbstract:This paper proposes a new design optimization framework for suspension systems considering the kinematic characteristics, such as the camber angle, caster angle, kingpin inclination angle, and toe angle in the presence of uncertainties. The coordinates of rear inner hardpoints of upper control arm and lower control arm of double wishbone suspension are considered as the design variables, as well as the uncertain parameters. In this way, the actual values of the design variables will vary surrounding their nominal values. The variations result in uncertainties that are described as interval variables with lower and upper bounds. The kinematic model of the suspension is developed in software ADAMS. A high-order response surface model using the zeros of Chebyshev polynomials as sampling points is established, termed as Chebyshev metamodel, to approximate the kinematic model. The Chebyshev meta-model is expected to provide higher approximation accuracy. Interval uncertain optimization problems usually involve a nested computationally expensive double-loop optimization process, in which the inner loop optimization is to calculate the bounds of the interval design functions, while the outer loop is to search the optimum for the deterministic optimization problem. To reduce the computational cost, the interval arithmetic is introduced in the inner loop to improve computational efficiency without compromising numerical accuracy. The numerical results show the effectiveness of the proposed design method. © 2014 Elsevier Inc.
Yunqing Zhang - One of the best experts on this subject based on the ideXlab platform.
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an interval uncertain optimization method for vehicle suspensions using chebyshev metamodels
Applied Mathematical Modelling, 2014Co-Authors: Jinglai Wu, Yunqing Zhang, Nong ZhangAbstract:This paper proposes a new design optimization framework for suspension systems considering the kinematic characteristics, such as the camber angle, caster angle, kingpin inclination angle, and toe angle in the presence of uncertainties. The coordinates of rear inner hardpoints of upper control arm and lower control arm of double wishbone suspension are considered as the design variables, as well as the uncertain parameters. In this way, the actual values of the design variables will vary surrounding their nominal values. The variations result in uncertainties that are described as interval variables with lower and upper bounds. The kinematic model of the suspension is developed in software ADAMS. A high-order response surface model using the zeros of Chebyshev polynomials as sampling points is established, termed as Chebyshev metamodel, to approximate the kinematic model. The Chebyshev meta-model is expected to provide higher approximation accuracy. Interval uncertain optimization problems usually involve a nested computationally expensive double-loop optimization process, in which the inner loop optimization is to calculate the bounds of the interval design functions, while the outer loop is to search the optimum for the deterministic optimization problem. To reduce the computational cost, the interval arithmetic is introduced in the inner loop to improve computational efficiency without compromising numerical accuracy. The numerical results show the effectiveness of the proposed design method.
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An interval uncertain optimization method for vehicle suspensions using Chebyshev metamodels
Applied Mathematical Modelling, 2014Co-Authors: Jinglai Wu, Yunqing Zhang, Zhen Luo, Nong ZhangAbstract:This paper proposes a new design optimization framework for suspension systems considering the kinematic characteristics, such as the camber angle, caster angle, kingpin inclination angle, and toe angle in the presence of uncertainties. The coordinates of rear inner hardpoints of upper control arm and lower control arm of double wishbone suspension are considered as the design variables, as well as the uncertain parameters. In this way, the actual values of the design variables will vary surrounding their nominal values. The variations result in uncertainties that are described as interval variables with lower and upper bounds. The kinematic model of the suspension is developed in software ADAMS. A high-order response surface model using the zeros of Chebyshev polynomials as sampling points is established, termed as Chebyshev metamodel, to approximate the kinematic model. The Chebyshev meta-model is expected to provide higher approximation accuracy. Interval uncertain optimization problems usually involve a nested computationally expensive double-loop optimization process, in which the inner loop optimization is to calculate the bounds of the interval design functions, while the outer loop is to search the optimum for the deterministic optimization problem. To reduce the computational cost, the interval arithmetic is introduced in the inner loop to improve computational efficiency without compromising numerical accuracy. The numerical results show the effectiveness of the proposed design method. © 2014 Elsevier Inc.
B. Reyes - One of the best experts on this subject based on the ideXlab platform.
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Reeves kingpin: A high-yielding mid-season potato variety suitable for fry processing
American Journal of Potato Research, 2006Co-Authors: Z. N. Ganga, G. A. Porter, D. H. Lambert, G. Sewell, A. Bushway, B. ReyesAbstract:Reeves Kingpin is a mid-season processing potato variety developed and selected at the University of Maine’s Aroostook Research Farm in Presque Isle, Maine. Its main attribute is its high-yielding potential, giving an average yield of 47 mt/ha. Reeves Kingpin is suitable for processing into french fries due to its large tubers, high specific gravity, and acceptable fry color. The average specific gravity of Reeves Kingpin is 1.085 which is comparable or better than ‘Russet Burbank’ and ‘Shepody’. Reeves Kingpin has received good baking scores, which may qualify it for fresh market; however, its tuber appearance generally does not meet fresh market standard. The tubers have netted to lightly russeted skin and are long and blocky in shape. The tubers rarely exhibit the pointed and knobby characteristics of Russet Burbank. The incidence of misshapen tubers, sunburn, and growth cracks can be high under some conditions; however, hollow heart, internal heat necrosis, and vascular discoloration are not usually a problem. Tubers of Reeves Kingpin are relatively tolerant to shatter and black spot bruise. The plants of Reeves Kingpin are relatively taller, with greener leaves, more flowers, and moderate to heavy fruit set compared to Russet Burbank. The late-season vigor of Reeves Kingpin is an advantage compared to Shepody, but its haulms can be hard to kill prior to harvest, particularly if over-fertilized. Reeves Kingpin is resistant to tuber net necrosis and moderately resistant to verticillium wilt and early blight. However, it is susceptible to golden cyst nematode, late blight, bacterial ring rot, and corky ring spot virus and moderately susceptible to common scab. Reeves Kingpin es una variedad de papa para procesamiento de madurez medianamente temprana, desarrollada y seleccionada en la Granja Experimental Aroostook de la Universidad de Maine en la Isla Presque, Maine. Su mayor atributo es el tener un alto rendimiento potencial con un promedio de 47 t/ha. Reeves Kingpin es apropiada para papa frita por tener tubérculos grandes, gravedad específica alta y color de fritura aceptable. Tiene un promedio de gravedad específica de 1.085, comparable o mejor que Russet Burbank y Shepody. Reeves Kingpin tiene buen puntaje de papa para horneado que la calificaría para su mercadeo en fresco, a pesar de que la apariencia del tubérculo no alcanza los estándares exigidos para este fin. Los tubérculos tiene la piel reticulada a ligeramente rosada, son alargados, de forma cúbica y rara vez exhiben las características de aguzados y nudosos propios de Russet Burbank. La incidencia de tubérculos deformes, rajaduras de crecimiento y por rayos solares, pueden ser altas bajo determinadas condiciones, pero generalmente no presentan problemas de corazón vacío, necrosis interna por calor y descoloramiento vascular. Los tubérculos de Reeves Kingpin son relativamente tolerantes a las rajaduras y magulladuras por mancha negra. Las plantas de Reeves Kingpin son relativamente altas con hojas más oscuras, mayor número de flores y fructificación moderada a alta en comparación con Russet Burbank. El vigor tardío de Reeves Kingpin es una ventaja cuando se compara con Shepody, pero sus rastrojos pueden ser difíciles de destruir antes de la cosecha, particularmente si las plantas han sido sobre fertilizadas. Reeves Kingpin es resistente a la necrosis en red del tubérculo y moderadamente resistente a la marchitez por Verticillium y tizón temprano, pero es susceptible al nematodo dorado, tizón tardío, pudrición bacteriana en anillo y al virus de la mancha corchosa en anillo y moderadamente susceptible a la sarna común.
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Reeves Kingpin: a high-yielding mid-season potato variety suitable for fry processing
American Journal of Potato Research, 2006Co-Authors: Z. N. Ganga, G. A. Porter, D. H. Lambert, A. Bushway, Gary H. Sewell, B. ReyesAbstract:Reeves Kingpin is a mid-season processing potato variety developed and selected at the University of Maine’s Aroostook Research Farm in Presque Isle, Maine. Its main attribute is its high-yielding potential, giving an average yield of 47 mt/ha. Reeves Kingpin is suitable for processing into french fries due to its large tubers, high specific gravity, and acceptable fry color. The average specific gravity of Reeves Kingpin is 1.085 which is comparable or better than ‘Russet Burbank’ and ‘Shepody’. Reeves Kingpin has received good baking scores, which may qualify it for fresh market; however, its tuber appearance generally does not meet fresh market standard. The tubers have netted to lightly russeted skin and are long and blocky in shape. The tubers rarely exhibit the pointed and knobby characteristics of Russet Burbank. The incidence of misshapen tubers, sunburn, and growth cracks can be high under some conditions; however, hollow heart, internal heat necrosis, and vascular discoloration are not usually a problem. Tubers of Reeves Kingpin are relatively tolerant to shatter and black spot bruise. The plants of Reeves Kingpin are relatively taller, with greener leaves, more flowers, and moderate to heavy fruit set compared to Russet Burbank. The late-season vigor of Reeves Kingpin is an advantage compared to Shepody, but its haulms can be hard to kill prior to harvest, particularly if over-fertilized. Reeves Kingpin is resistant to tuber net necrosis and moderately resistant to verticillium wilt and early blight. However, it is susceptible to golden cyst nematode, late blight, bacterial ring rot, and corky ring spot virus and moderately susceptible to common scab.
Peter L Fitzgerald - One of the best experts on this subject based on the ideXlab platform.
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drug Kingpins and blacklisting compliance issues with u s economic sanctions part 2
2008Co-Authors: Peter L FitzgeraldAbstract:The proliferation of different sanctions programs and their accompanying blacklists over the last decade poses a number of issues for those seeking to comply with the Government's controls in good faith. To explore these issues Congress created the Judicial Review Commission on Foreign Asset Control when it passed the Foreign Narcotics Kingpin Designation Act, and directed that the Commission conduct a "review of the current judicial, regulatory, and administrative authorities" relating to the sanctions and "evaluate the remedies available to United States persons" affected by the sanctions. In order to carry out its duties, it's essential that the Commission consider the Kingpin Act sanctions against the backdrop of the Office of Foreign Assets Control's other sanctions programs. While individual sanctions programs are typically created by Government policy makers with a narrow focus on a specific objective, the compliance programs that private parties must craft must integrate all the various programs into a coherent whole in order to manage their business dealings. Accordingly, the full impact of the requirements of any one set of controls, such as the Kingpin Act sanctions, can only be fully appreciated when compared to OFAC's other programs. The aim of this paper is to survey these "compliance" issues. It is an effort to highlight, without delving into the political policies motivating any particular sanctions program, the practical difficulties facing private parties in meeting the requirements of OFAC's disparate programs, including the Kingpin Act sanctions. This is Part 2 of a three part series.
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drug Kingpins and blacklisting compliance issues with u s economic sanctions part 1
2008Co-Authors: Peter L FitzgeraldAbstract:The proliferation of different sanctions programs and their accompanying blacklists over the last decade poses a number of issues for those seeking to comply with the Government's controls in good faith. To explore these issues Congress created the Judicial Review Commission on Foreign Asset Control when it passed the Foreign Narcotics Kingpin Designation Act, and directed that the Commission conduct a "review of the current judicial, regulatory, and administrative authorities" relating to the sanctions and "evaluate the remedies available to United States persons" affected by the sanctions. In order to carry out its duties, it's essential that the Commission consider the Kingpin Act sanctions against the backdrop of the Office of Foreign Assets Control's other sanctions programs. While individual sanctions programs are typically created by Government policy makers with a narrow focus on a specific objective, the compliance programs that private parties must craft must integrate all the various programs into a coherent whole in order to manage their business dealings. Accordingly, the full impact of the requirements of any one set of controls, such as the Kingpin Act sanctions, can only be fully appreciated when compared to OFAC's other programs. The aim of this paper is to survey these "compliance" issues. It is an effort to highlight, without delving into the political policies motivating any particular sanctions program, the practical difficulties facing private parties in meeting the requirements of OFAC's disparate programs, including the Kingpin Act sanctions. This is Part 1 of a three part series.
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drug Kingpins and blacklisting compliance issues with u s economic sanctions part 3
2008Co-Authors: Peter L FitzgeraldAbstract:The proliferation of different sanctions programs and their accompanying blacklists over the last decade poses a number of issues for those seeking to comply with the Government's controls in good faith. To explore these issues Congress created the Judicial Review Commission on Foreign Asset Control when it passed the Foreign Narcotics Kingpin Designation Act, and directed that the Commission conduct a "review of the current judicial, regulatory, and administrative authorities" relating to the sanctions and "evaluate the remedies available to United States persons" affected by the sanctions. In order to carry out its duties, it's essential that the Commission consider the Kingpin Act sanctions against the backdrop of the Office of Foreign Assets Control's other sanctions programs. While individual sanctions programs are typically created by Government policy makers with a narrow focus on a specific objective, the compliance programs that private parties must craft must integrate all the various programs into a coherent whole in order to manage their business dealings. Accordingly, the full impact of the requirements of any one set of controls, such as the Kingpin Act sanctions, can only be fully appreciated when compared to OFAC's other programs. The aim of this paper is to survey these "compliance" issues. It is an effort to highlight, without delving into the political policies motivating any particular sanctions program, the practical difficulties facing private parties in meeting the requirements of OFAC's disparate programs, including the Kingpin Act sanctions. This is Part 3 of a three part series.
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drug Kingpins and blacklists compliance issues with us economic sanctions part 2
Journal of Money Laundering Control, 2001Co-Authors: Peter L FitzgeraldAbstract:The proliferation of sanctions programmes over time, each with its own set of regulations and its own peculiar blacklist, makes it more difficult for OFAC to administer the controls in a smooth, consistent and efficient manner. Additionally, unlike other agencies involved in international trade — such as the Commerce Department's BXA, or the State Department's DTC — OFAC has been slow to develop a cooperative relationship with those who must comply with its regulations. While OFAC's singular focus on economic and financial sanctions has enabled it to avoid some of the problems the Commerce Department sometimes experiences as a result of its dual missions of both promoting and controlling trade, it has also fostered a more adversarial relationship with the trading community. As OFAC has focused on each sanctions programme individually, rather than as part of a comprehensive system of controls, it has tended to be insensitive to the needs of those who must integrate its diverse regulatory requirements into an overall business compliance process.
