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Optimum Design for Airliner Environmental Control System

Fang Lin,Wang Jun

Strategic Study of CAE 2006, Volume 8, Issue 1,   Pages 77-80

Abstract: Generalized multiplier combined with simplex method is used to seek the optimum solution.The optimized results can be used as the theoretic foundation for the design and research of airliner

Keywords： airliner     environmental control     optimum design    

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Estimation of optimum design of structural systems via machine learning

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1441-1452 doi: 10.1007/s11709-021-0774-0

Abstract: Three different structural engineering designs were investigated to determine optimum design variables, and then to estimate design parameters and the main objective function of designs directly, speedilyestimation for structures is an effective, successful, and speedy tool to forecast and determine the real optimumresults for any design model.

Keywords： optimization     metaheuristic algorithms     harmony search     structural designs     machine learning     artificial neural networks    

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Optimum design and preliminary experiments of a novel parallel end traction apparatus for upper-limb

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 726-746 doi: 10.1007/s11465-021-0651-5

Abstract: Robot-assisted technology has been increasingly employed in the therapy of post stroke patients to deliver high-quality treatment and alleviate therapists’ burden. This paper introduces a novel parallel end traction apparatus (PETA) to supplement equipment selection. Considering the appearance and performance of the PETA, two types of special five-bar linkage mechanisms are selected as the potential configurations of the actuation execution unit because of their compact arrangement and parallel structure. Kinematic analysis of each mechanism, i.e., position solutions and Jacobian matrix, is carried out. Subsequently, a comparative study between the two mechanisms is conducted. In the established source of nondimensional parameter synthesis, the singularity, maximum continuous workspace, and performance variation trends are analyzed. Based on the evaluation results, the final scheme with determined configuration and corresponding near-optimized nondimensional parameters is obtained. Then, a prototype is constructed. By adding a lockable translational degree of freedom in the vertical direction, the PETA can provide 2D planar exercise and 3D spatial exercise. Finally, a control system is developed for passive exercise mode based on the derived inverse position solution, and preliminary experiments are performed to verify the applicability of the PETA.

Keywords： parallel mechanism     upper-limb rehabilitation     singularity and workspace analyses     performance evaluation     optimumdesign    

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Effectiveness analysis and optimum design of the rotary regenerator for thermophotovoltaic (TPV) system

Xi WU, Hong YE, Jianxiang WANG, Jie HE, Jian YANG

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 193-199 doi: 10.1007/s11708-012-0184-z

Abstract: The influence of the period of rotation on the effectiveness of the thermophotovoltaic (TPV) rotary regenerator was theoretically and experimentally investigated. It was found that the deviations of the theoretical results from the experimental ones decrease with the increase of the period of rotation. To the TPV system of 10 kW combustion power, the deviation is 3.5% when the rotation period is 3 s; while the deviation decreases to 1.5% when the rotation period increases to 15 s. The deviation could be mainly attributed to the cold and hot fluids carryover loss which was not considered in the model. With a new model taking account of the carryover loss established, the predicted results were greatly improved. Based on the modified model, the influence of geometrical parameters of rotary regenerator on the effectiveness was analyzed for TPV systems of various combustion power. The results demonstrate that the effectiveness increases with the increase of the rotary regenerator diameter and height, while fluid carryover loss increases at the same time, which weakens the impact of geometrical parameters.

Keywords： thermophotovoltaic (TPV) system     rotary regenerator     effectiveness     carryover loss    

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Ranking of design scenarios of TMD for seismically excited structures using TOPSIS

Sadegh ETEDALI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1372-1386 doi: 10.1007/s11709-020-0671-y

Abstract: free search of the TMD parameters is performed using a particle swarm optimization (PSO) algorithm for optimumSimulation results indicate that the minimization of the maximum story displacement is the optimum designFurthermore, H of the displacement vector of the structure exhibited optimum ranking among the adopteddesign scenarios in the constrained case for the maximum TMD stroke.The findings of this study can be useful and important in the optimum design of TMD parameters with respect

Keywords： seismic-excited building     TMD     optimum design     PSO     design scenario     TOPSIS    

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A novel algorithm for frequency dependent modeling of ferrite ring and its optimum design to study VFTO

Mehrdad MAJIDI, Hamid JAVADI, Moein MANBACHI

Frontiers in Energy 2014, Volume 8, Issue 1,   Pages 90-100 doi: 10.1007/s11708-013-0286-2

Abstract: One of the fundamental issues in gas insulated substations (GIS) which has destructive effects on GIS equipment is the very fast transient over-voltages (VFTOs). This paper models a 400/230 kV substation in order to study the effects of VFTO extensively implemented on EMTP-RV. In addition, the application of ferrite rings for suppressing VFTOs is assessed thoroughly. The main advantage of this paper is its new proposed algorithm according to the ferrite ring frequency dependent modeling that is validated with experimental results. This paper examines the effects of three compositions of the ferrite ring on VFTO suppression. Moreover, it estimates the dimension of the ferrite ring based on the SF6 gas insulation withstand and the maximum effect of ferrite rings on VFTO suppression constraint with the COMSOL multiphysics software. Furthermore, it gains VFTO attenuated percentages due to the installation of the ferrite ring in different GIS nodes. Finally, it analyzes the offered VFTO amendment technique in various GIS switching scenarios.

Keywords： comsol multiphysics     EMTP-RV     ferrite ring     gas insulated substations (GIS)     transient over-voltage     insulation coordination    

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Optimum design of a channel roughened by dimples to improve cooling performance

Abdus SAMAD, Ki-Don LEE, Kwang-Yong KIM, Jin-Hyuk KIM,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 262-268 doi: 10.1007/s11708-010-0012-2

Abstract: Three non-dimensional design variables based on dimple size and channel dimensions and two objectivesincreased much higher than pressure drop and the thermal performance also has shown improvement for the optimumdesign as compared to the reference one.The optimum design produces lower channel height, wider dimple spacing, and deeper dimple as compared

Keywords： Staggered     three-dimensional Reynolds-averaged     multi-objective optimization     reference     transfer    

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Border-search and jump reduction method for size optimization of spatial truss structures

Babak DIZANGIAN, Mohammad Reza GHASEMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 123-134 doi: 10.1007/s11709-018-0478-2

Abstract: This paper proposes a sensitivity-based border-search and jump reduction method for optimum design ofIt is considered as a two-phase optimization approach, where at the first phase, the first local optimumlimited employing an efficient random strategy, and the second phase involves finding a sequence of local optimum

Keywords： optimum design     sensitivity analysis     reduction method     spatial trusses     OpenSees    

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Application of orthogonal optimization design for vehicle maneuverability and structure optimum based

Che Huajun,Chen Nan,Yin Guodong

Strategic Study of CAE 2009, Volume 11, Issue 9,   Pages 81-86

Abstract: Orthogonal optimization design was applied to optimizing vehicle maneuverability with ADAMS software.The design process can be used in industrial organization.

Keywords： virtual prototyping     vehicle maneuverability     orthogonal optimization design    

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System Non-optimum Analysis Theory and Method

He Ping

Strategic Study of CAE 2003, Volume 5, Issue 7,   Pages 40-46

Abstract:

This paper discusses non-optimum analysis theory of system and points out main problem of exploringThe key is short of the non-optimum analysis to the system.The article establishes symptom covey and empirical analysis based on non-optimum category of the system, and puts forward that system is degree measured along with non-optimum traced up to systematic self-organization

Keywords： the non-optimum category of system     non-optimum symptom covey     non-optimum magnanimity     systematic self-organization    

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Determining the optimum economic insulation thickness of double pipes buried in the soil for district

Fating LI, Pengfei JIE, Zhou FANG, Zhimei WEN

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 170-185 doi: 10.1007/s11708-020-0680-5

Abstract: An optimization model to obtain the optimum insulation thickness (OIT) and minimum annual total cost

Keywords： double pipes     optimization model     optimum insulation thickness     minimum annual total cost    

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Unified cycle model of a class of internal combustion engines and their optimum performance characteristics

Shiyan ZHENG

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 367-375 doi: 10.1007/s11708-011-0170-x

Abstract: The influence of the various design parameters such as the high-low pressure ratio, the high-low temperatureThe optimum criteria of some important parameters such as the power output, efficiency and pressure ratio

Keywords： internal combustion engine     irreversibility     power output     efficiency     optimization    

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Biological chip technology to quickly batch select optimum cryopreservation procedure

YU Lina, LIU Jing, ZHOU Yixin, HUA Zezhao

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 316-321 doi: 10.1007/s11708-007-0046-2

Abstract: In the practices of cryobiology, selection of an optimum freeze/thawing program and an idealistic cryoprotectiveof biochip technology was introduced to the field of cryopreservation, aiming at quickly finding an optimum

Keywords： idealistic cryoprotective     concentration     Prototype     technology     alternative    

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Implementation of an optimum algorithm for structural reliability analysis based on FEM

CHENG Ying, TU Hong-mao, FAN Hong-li

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 468-471 doi: 10.1007/s11465-006-0061-8

Abstract: (finite element) method rapidly and efficiently, a method combined with the FE method and gradient optimumResults of an example demonstrate that the method requires fewer FE calculations compared with the design

Keywords： satisfactory     interpretation     algorithm     structural reliability     stochastic FE    

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Optimum nitrogen fertilization of

Wentao ZOU,Ruifeng JIA,Jinchang YANG,Rongsheng LI,Guangtian YIN

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 4,   Pages 368-374 doi: 10.15302/J-FASE-2016120

Abstract: Based on the critical values of leaf N and P concentration and N/P ratio, the optimum amount of nitrogen

Keywords： Calophyllum inophyllum     growth     nitrogen fertilization     nutrient status     photosynthesis    

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Title Author Date Type Operation

Optimum Design for Airliner Environmental Control System

Fang Lin,Wang Jun

Journal Article

Estimation of optimum design of structural systems via machine learning

Journal Article

Optimum design and preliminary experiments of a novel parallel end traction apparatus for upper-limb

Journal Article

Effectiveness analysis and optimum design of the rotary regenerator for thermophotovoltaic (TPV) system

Xi WU, Hong YE, Jianxiang WANG, Jie HE, Jian YANG

Journal Article

Ranking of design scenarios of TMD for seismically excited structures using TOPSIS

Sadegh ETEDALI

Journal Article

A novel algorithm for frequency dependent modeling of ferrite ring and its optimum design to study VFTO

Mehrdad MAJIDI, Hamid JAVADI, Moein MANBACHI

Journal Article

Optimum design of a channel roughened by dimples to improve cooling performance

Abdus SAMAD, Ki-Don LEE, Kwang-Yong KIM, Jin-Hyuk KIM,

Journal Article

Border-search and jump reduction method for size optimization of spatial truss structures

Babak DIZANGIAN, Mohammad Reza GHASEMI

Journal Article

Application of orthogonal optimization design for vehicle maneuverability and structure optimum based

Che Huajun,Chen Nan,Yin Guodong

Journal Article

System Non-optimum Analysis Theory and Method

He Ping

Journal Article

Determining the optimum economic insulation thickness of double pipes buried in the soil for district

Fating LI, Pengfei JIE, Zhou FANG, Zhimei WEN

Journal Article

Unified cycle model of a class of internal combustion engines and their optimum performance characteristics

Shiyan ZHENG

Journal Article

Biological chip technology to quickly batch select optimum cryopreservation procedure

YU Lina, LIU Jing, ZHOU Yixin, HUA Zezhao

Journal Article

Implementation of an optimum algorithm for structural reliability analysis based on FEM

CHENG Ying, TU Hong-mao, FAN Hong-li

Journal Article

Optimum nitrogen fertilization of

Wentao ZOU,Ruifeng JIA,Jinchang YANG,Rongsheng LI,Guangtian YIN

Journal Article