Multi-Factor Analysis and Combination Optimization Design of Subway Train Travel Speed

This paper presents an automatic multiobjective hydrodynamic optimization strategy for pump–turbine impellers. In the strategy, the blade shape is parameterized based on the blade loading distribution using an inverse design method. An efficient response surface model relating the design parameters and the objective functions is obtained. Then, a multiobjective evolutionary algorithm is applied to the response surface functions to find a Pareto front for the final trade-off selection. The optimization strategy was used to redesign a scaled pump–turbine. Model tests were conducted to validate the final design and confirm the validity of the design strategy.

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Combination Optimization Design Method of Vibration Isolation and Shock Resistance System

Fracture and Damage Mechanics V - Key Engineering Materials ◽

10.4028/0-87849-413-8.783 ◽

2006 ◽

pp. 783-786

Author(s):

Cun Sheng Zhao ◽

Shi Jian Zhu

Keyword(s):

Optimization Design ◽

Vibration Isolation ◽

Design Method ◽

Combination Optimization ◽

Resistance System ◽

Shock Resistance

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Optimization Design of Vibration and Shock Isolation System

Noise Control and Acoustics ◽

10.1115/imece2006-14035 ◽

2006 ◽

Author(s):

Cun-Sheng Zhao ◽

Shi-Jian Zhu ◽

Zhen-Zhong Zhang

Keyword(s):

Optimal Design ◽

Optimization Design ◽

Vibration Isolation ◽

Design Method ◽

Engineering Application ◽

Experimental Results ◽

Isolation System ◽

Combination Optimization ◽

Shock Resistance ◽

Shock Isolation

The combination optimization design problem of vibration isolation and shock resistance system is studied in consideration of acoustical concealment performance and lifeforce of ships. The weakness of design method based on continuity is pointed out and combination optimal design method is brought forward. Then the limiting performance of shock isolation system is analyzed and two realization methods are discussed. One method is to adopt linear stiffness component with large damping. The other method is to use multiple linear stiffness components without damping. Amplitude of steady excitation is much smaller than that of shock input during experiment. Experimental results showed that the optimal loss factor is still 0.4 when the stiffness of shock bumper is much larger than that of vibration isolator, just the same with that suffered from only shock loads. Experimental results also showed that limiting performance can be achieved by configuration optimal design using multiple linear components. The two discussed methods can be used to direct engineering application.

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Research on Optimization Design of Suzhou Sandalwood Fans Based on Level of Analysis of Female Aesthetic Images

E3S Web of Conferences ◽

10.1051/e3sconf/202123604051 ◽

2021 ◽

Vol 236 ◽

pp. 04051

Author(s):

Lili Zhang ◽

Yue Qian ◽

Ming Xia

Keyword(s):

Factor Analysis ◽

Theoretical Model ◽

Optimization Design ◽

Design Practice ◽

Information Analysis ◽

Feature Identification ◽

Cultural Elements ◽

Analysis Methods ◽

Computer Aided ◽

Level Of Analysis

This study constructs the hierarchical theoretical model of image design to realize more accurate aesthetic feature identification for females. The study mainly takes the scale, material and hollowed-out technique of Suzhou Sandalwood Fans as the carrier for the perception of products’ aesthetic image, then retrieves words of female perceptual image with factor analysis in SPSS and other computer-aided information analysis methods, and evaluates the weights of different aesthetic image factors to screen out case models with higher adaptability, thus improving the market acceptance of subsequent design schemes. Based on relevant Suzhou cultural elements, it carries out the detailed optimization design practice to verify the feasibility of this method.

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Comprehensive Improvement of Mixed-Flow Pump Impeller Based on Multi-Objective Optimization

Processes ◽

10.3390/pr8080905 ◽

2020 ◽

Vol 8 (8) ◽

pp. 905 ◽

Cited By ~ 3

Author(s):

Mengcheng Wang ◽

Yanjun Li ◽

Jianpin Yuan ◽

Fan Meng ◽

Desmond Appiah ◽

...

Keyword(s):

Optimization Design ◽

Design Method ◽

Latin Hypercube Sampling ◽

Surface Model ◽

Pump Efficiency ◽

Mixed Flow ◽

Pump Impeller ◽

Combination Optimization ◽

Pump Head ◽

Flow Pump

The spanwise distribution of impeller exit circulation (SDIEC) has a significant effect on the impeller performance, therefore, there is a need for its consideration in the optimization design of mixed-flow pumps. In this study, a combination optimization system, including a 3D inverse design method (IDM), computational fluid dynamics (CFD), Latin hypercube sampling (LHS) method, response surface model (RSM), and non-dominated sorting genetic algorithm (NSGA-Ⅱ) was used to improve the performance of the mixed-flow pump after considering the effect of SDIEC on the performance of the impeller. The CFD results confirm the accuracy and credibility of the optimization results because of the good agreement the CFD results established with the experimental measurements. Compared with the original impeller, the pump efficiency of the preferred impeller at 0.8Qdes, 1.0Qdes, and 1.2Qdes improved by 0.63%, 3.39%, and 3.77% respectively. The low-pressure region on the blade surface reduced by 96.92% while the pump head difference was less than 1.84% at the design point. In addition, a comparison of the flow field of the preferred impeller and the original impeller revealed the effect of SDIEC on mixed-flow pump performance improvement and flow mechanism.

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Combination Optimization Design Method of Vibration Isolation and Shock Resistance System

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.324-325.783 ◽

2006 ◽

Vol 324-325 ◽

pp. 783-786

Author(s):

Cun Sheng Zhao ◽

Shi Jian Zhu

Keyword(s):

Optimal Design ◽

Optimization Design ◽

Vibration Isolation ◽

Design Method ◽

Engineering Application ◽

Isolation System ◽

Combination Optimization ◽

Resistance System ◽

Shock Resistance ◽

Simulation Results

The optimization design problem of vibration isolation and shock resistance system is studied in consideration of acoustical concealment performance and life-force of ships. The weakness of design method based on continuity is pointed out and combination optimal design method is brought forward. Then the limiting performance of shock isolation system is analyzed and two realization methods are discussed. One method is to adopt linear stiffness component with large damping. The other method is to use multiple linear stiffness components without damping. Simulation results showed that the optimal loss factor is still 0.4 when the stiffness of shock bumper is much larger than that of vibration isolator, just the same with that suffering from only shock loads. Simulation results also showed that limiting performance can be achieved by configuration optimal design using multiple linear components. The two discussed methods can be used to direct engineering application.

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A factor analysis of students' ratings of clinical teaching

Journal of Dental Education ◽

10.1002/j.0022-0337.1984.48.5.tb01786.x ◽

1984 ◽

Vol 48 (5) ◽

pp. 258-262 ◽

Cited By ~ 4

Author(s):

E Romberg

Keyword(s):

Factor Analysis ◽

Clinical Teaching

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Factor Analysis of Measures of Articulation, Language, Auditory Processing, Reading-Spelling, and Maxillofacial Structure

Journal of Speech and Hearing Research ◽

10.1044/jshr.2002.319 ◽

1977 ◽

Vol 20 (2) ◽

pp. 319-324

Author(s):

Anita F. Johnson ◽

Ralph L. Shelton ◽

William B. Arndt ◽

Montie L. Furr

Keyword(s):

Factor Analysis ◽

Clinical Judgment ◽

Auditory Processing

This study was concerned with the correspondence between the classification of measures by clinical judgment and by factor analysis. Forty-six measures were selected to assess language, auditory processing, reading-spelling, maxillofacial structure, articulation, and other processes. These were applied to 98 misarticulating eight- and nine-year-old children. Factors derived from the analysis corresponded well with categories the measures were selected to represent.

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