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A new Rsslor hyperchaotic system and its realization with systematic circuit parameter design 被引量:31
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作者 王光义 何海莲 《Chinese Physics B》 SCIE EI CAS CSCD 2008年第11期4014-4021,共8页
Based on two modified Rosslor hyperchaotic systems, which are derived from the chaotic Rosslor system by introducing a state feedback controller, this paper proposes a new switched Rosslor hyperchaotic system. The swi... Based on two modified Rosslor hyperchaotic systems, which are derived from the chaotic Rosslor system by introducing a state feedback controller, this paper proposes a new switched Rosslor hyperchaotic system. The switched system contains two different hyperchaotic systems and can change its behaviour continuously from one to another via a switching function. On the other hand, it presents a systematic method for designing the circuit of realizing the proposed hyperchaotic system. In this design, circuit state equations are written in normalized dimensionless form by rescaling the time variable. Furthermore, an analogous circuit is designed by using the proposed method and built for verifying the new hyperchaos and the design method. Experimental results show a good agreement between numerical simulations and experimental results. 展开更多
关键词 HYPERCHAOS Rosslor system circuit implementation parameter design
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CONSTRUCTION OF OPTIMAL BLOCKING SCHEMES FOR ROBUST PARAMETER DESIGNS 被引量:2
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作者 杨建峰 张润楚 刘民千 《Acta Mathematica Scientia》 SCIE CSCD 2013年第5期1431-1438,共8页
Robust parameter design (RPD) is an important issue in experimental designs. If all experimental runs cannot be performed under homogeneous conditions, blocking the units is effective. In this paper, we obtain the c... Robust parameter design (RPD) is an important issue in experimental designs. If all experimental runs cannot be performed under homogeneous conditions, blocking the units is effective. In this paper, we obtain the correspondence relation between fractional factorial RPDs and the blocking schemes for full factorial RPDs. In addition, we provide a construction of optimal blocking schemes that make all main effects and control-by-noise two-factor interactions estimable. 展开更多
关键词 ALIAS BLOCKING factorial design factorial effect robust parameter design
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The Method for Optimum Design of Water Rocket Flight Stability Performance Conditions Using CAE with T Method and Robust Parameter Design 被引量:1
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作者 Eiji Toma Yoshihiro Ito 《Journal of Applied Mathematics and Physics》 2021年第11期2669-2697,共29页
A water rocket is a rocket system that obtains thrust by injecting water with compressed air of up to about 8 atmospheres. It is usually manufactured using a pressure-resistant PET bottle. The mechanical elements and ... A water rocket is a rocket system that obtains thrust by injecting water with compressed air of up to about 8 atmospheres. It is usually manufactured using a pressure-resistant PET bottle. The mechanical elements and principles contained in the water rocket have much in common with the actual small rocket system, and are suitable as educational and research teaching materials in the field of mechanics. Especially in the field of disaster prevention and mitigation, the use of water rockets is being researched and developed as a rescue tool in the event of a flood or earthquake as a disaster countermeasure. However, since the water rocket is a flying object based on the mechanical principle, it is important to ensure the accuracy and stability of the flight path. In this paper, a mechanical simulator is developed with a numerical calculation program based on the mechanical consideration of water rocket flight performance. In addition, the correlation between the flight distance obtained in the simulation and the estimated flight distance is analyzed by applying a multivariate analysis method and verifying the validity of the flight distance calculated from the result. Based on the verification results, we will apply a statistical optimization method to approach the optimization of flight stability performance conditions for water rockets. 展开更多
关键词 Flying Principle Multivariate Analysis T Method Robust parameter design Flight Stability Energetic SN Ratio
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A New Result on Regular Designs under Baseline Parameterization
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作者 Mengru Qin Yuna Zhao 《Open Journal of Applied Sciences》 2024年第2期441-449,共9页
The study on designs for the baseline parameterization has aroused attention in recent years. This paper focuses on two-level regular designs for the baseline parameterization. A general result on the relationship bet... The study on designs for the baseline parameterization has aroused attention in recent years. This paper focuses on two-level regular designs for the baseline parameterization. A general result on the relationship between K-aberration and word length pattern is developed. 展开更多
关键词 Baseline parameterization K-Aberration Regular design Word Length Pattern
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Review of Design of Process Parameters for Squeeze Casting
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作者 Jianxin Deng Bin Xie +1 位作者 Dongdong You Haibin Huang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2023年第6期22-35,共14页
Squeeze casting(SC)is an advanced net manufacturing process with many advantages for which the quality and properties of the manufactured parts depend strongly on the process parameters.Unfortunately,a universal effic... Squeeze casting(SC)is an advanced net manufacturing process with many advantages for which the quality and properties of the manufactured parts depend strongly on the process parameters.Unfortunately,a universal efficient method for the determination of optimal process parameters is still unavailable.In view of the shortcomings and development needs of the current research methods for the setting of SC process parameters,by consulting and analyzing the recent research literature on SC process parameters and using the CiteSpace literature analysis software,manual reading and statistical analysis,the current state and characteristics of the research methods used for the determination of SC process parameters are summarized.The literature data show that the number of pub-lications in the literature related to the design of SC process parameters generally trends upward albeit with signifi-cant fluctuations.Analysis of the research focus shows that both“mechanical properties”and“microstructure”are the two main subjects in the studies of SC process parameters.With regard to materials,aluminum alloys have been extensively studied.Five methods have been used to obtain SC process parameters:Physical experiments,numeri-cal simulation,modeling optimization,formula calculation,and the use of empirical values.Physical experiments are the main research methods.The main methods for designing SC process parameters are divided into three categories:Fully experimental methods,optimization methods that involve modeling based on experimental data,and theoreti-cal calculation methods that involve establishing an analytical formula.The research characteristics and shortcomings of each method were analyzed.Numerical simulations and model-based optimization have become the new required methods.Considering the development needs and data-driven trends of the SC process,suggestions for the develop-ment of SC process parameter research have been proposed. 展开更多
关键词 Squeeze casting Process parameter design Process parameter optimization DATA-DRIVEN Neural network Research method analysis Literature analysis CITESPACE
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Application Strategies of Modular Design in Assembled Teaching Buildings
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作者 Huina Li 《Journal of Contemporary Educational Research》 2024年第6期50-56,共7页
As an efficient,environmentally friendly,energy-saving construction method,assembled buildings are now widely used in campus building construction.Modular design thinking is system-based design thinking,and its applic... As an efficient,environmentally friendly,energy-saving construction method,assembled buildings are now widely used in campus building construction.Modular design thinking is system-based design thinking,and its application to the design of an assembled teaching building project will comprehensively improve the rationality of the teaching building and component design.The paper focuses on the application of modular design thinking in assembled teaching building design,aiming to provide references for China’s architectural design units,giving full play to the advantages of modular design thinking in future teaching building design projects,and enhancing the level of design,for the construction of the teaching building and the basis of the technical guarantee. 展开更多
关键词 Modular design Assembled teaching building Basic module division Structured parameter design Online publication:July 3 2024
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Uncertainty analysis for the calculation of marine environmental design parameters in the South China Sea
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作者 Guilin LIU Xinsheng ZHOU +3 位作者 Yi KOU Fang WU Daniel ZHAO Yu XU 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2023年第2期427-443,共17页
The calculation results of marine environmental design parameters obtained from different data sampling methods,model distributions,and parameter estimation methods often vary greatly.To better analyze the uncertainti... The calculation results of marine environmental design parameters obtained from different data sampling methods,model distributions,and parameter estimation methods often vary greatly.To better analyze the uncertainties in the calculation of marine environmental design parameters,a general model uncertainty assessment method is necessary.We proposed a new multivariate model uncertainty assessment method for the calculation of marine environmental design parameters.The method divides the overall model uncertainty into two categories:aleatory uncertainty and epistemic uncertainty.The aleatory uncertainty of the model is obtained by analyzing the influence of the number and the dispersion degree of samples on the information entropy of the model.The epistemic uncertainty of the model is calculated using the information entropy of the model itself and the prediction error.The advantages of this method are that it does not require many-year-observation data for the marine environmental elements,and the method can be used to analyze any specific factors that cause model uncertainty.Results show that by applying the method to the South China Sea,the aleatory uncertainty of the model increases with the number of samples and then stabilizes.A positive correlation was revealed between the dispersion of the samples and the aleatory uncertainty of the model.Both the distribution of the model and the parameter estimation results of the model have significant effects on the epistemic uncertainty of the model.When the goodness-of-fit of the model is relatively close,the best model can be selected according to the criterion of the lowest overall uncertainty of the models,which can both ensure a better model fit and avoid too much uncertainty in the model calculation results.The presented multivariate model uncertainty assessment method provides a criterion to measure the advantages and disadvantages of the marine environmental design parameter calculation model from the aspect of uncertainty,which is of great significance to analyze the uncertainties in the calculation of marine environmental design parameters and improve the accuracy of the calculation results. 展开更多
关键词 South China Sea marine environmental design parameters model uncertainty information entropy Monte Carlo method
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A global solution for robust parameter design of aeronautical electrical apparatus based on interactions analysis and polynomial fitting 被引量:1
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作者 Jie DENG Xuerong YE +1 位作者 Jianhu XUE Guofu ZHAI 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2020年第3期910-921,共12页
Robust Parameter Design(RPD) has been widely applied for improving quality and reliability of products.One of the key drawbacks of applying RPD using Taguchi method is that the stable factors may not be independent of... Robust Parameter Design(RPD) has been widely applied for improving quality and reliability of products.One of the key drawbacks of applying RPD using Taguchi method is that the stable factors may not be independent of the adjustment factors, resulting in unsatisfactory design.Moreover, the Taguchi method cannot guarantee global optimality since the levels set in the experiment are usually discrete to ensure orthogonal design.In this paper, robust solutions of the stable factors are obtained via a nonlinear model based on polynomial fitting;while the adjustment factors are obtained via interactions analysis so that they are independent of the stable factors.In particular, the values of the adjustment factors are determined by output offset compensation so as to achieve robustness of the design scheme.An example on the design of an aeronautical electrical apparatus is presented to illustrate the procedure.The results show that the proposed method can take full advantage of the nonlinearity in the response and achieve the desired outcome. 展开更多
关键词 Aeronautical electrical apparatus Global optimization Interactions analysis Polynomial fitting Robust parameter design
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Optimization parameter design of a circular e^+e^- Higgs factory 被引量:1
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作者 王逗 高杰 +8 位作者 肖铭 耿会平 郭媛媛 许守彦 王娜 安宇文 秦庆 徐刚 王生 《Chinese Physics C》 SCIE CAS CSCD 2013年第9期61-67,共7页
In this paper we will show a general method of how to make an optimized parameter design of a circular e+e- Higgs factory by using analytical expression of maximum beam-beam parameter and beamstrahlung beam lifetime ... In this paper we will show a general method of how to make an optimized parameter design of a circular e+e- Higgs factory by using analytical expression of maximum beam-beam parameter and beamstrahlung beam lifetime starting from a given design goal and technical limitations. A parameter space has been explored. Based on beam parameters scan and RF parameters scan, a set of optimized parameter designs for 50 km Circular Higgs Factory (CHF) with different RF frequency was proposed. 展开更多
关键词 circular Higgs factory (CHF) parameter design OPTIMIZATION RF technology
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Parameterized design of nonlinear feedback controllers for servo positioning systems 被引量:1
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作者 Cheng Guoyang Jin Wenguang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2006年第3期593-599,共7页
To achieve fast, smooth and accurate set point tracking in servo positioning systems, a parameterized design of nonlinear feedback controllers is presented, based on a so-called composite nonlinear feedback (CNF) co... To achieve fast, smooth and accurate set point tracking in servo positioning systems, a parameterized design of nonlinear feedback controllers is presented, based on a so-called composite nonlinear feedback (CNF) control technique. The controller designed here consists of a linear feedback part and a nonlinear part. The linear part is responsible for stability and fast response of the closed-loop system. The nonlinear part serves to increase the damping ratio of closed-loop poles as the controlled output approaches the target reference. The CNF control brings together the good points of both the small and the large damping ratio cases, by continuously scheduling the damping ratio of the dominant closed-loop poles and thus has the capability for superior transient performance, i.e. a fast output response with low overshoot. In the presence of constant disturbances, an integral action is included so as to remove the static bias. An explicitly parameterized controller is derived for servo positioning systems characterized by second-order model. Practical application in a micro hard disk drive servo system is then presented, together with some discussion of the rationale and characteristics of such design. Simulation and experimental results demonstrate the effectiveness of this control design methodology. 展开更多
关键词 control systems nonlinear feedback parameterized design servo tracking disturbance.
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STRUCTURE PARAMETERS DESIGN AND PERFORMANCE TEST OF FUEL INJECTION SYSTEM 被引量:4
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作者 WU Changshui YU Jinxia YANG Lin ZHUO Bin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第3期407-411,共5页
Based on the numerical simulation analysis, structure parameters of the high pressure fuel pump and common rail as well as flow limiter are designed and the GD-1 high pressure common rail fuel injection system is self... Based on the numerical simulation analysis, structure parameters of the high pressure fuel pump and common rail as well as flow limiter are designed and the GD-1 high pressure common rail fuel injection system is self-developed. Fuel injection characteristics experiment is performed on the GD-1 system. And double-factor variance analysis is applied to investigate the influence of the rail pressure and injection pulse width on the consistency of fuel injection quantity, thus to test whether the design of structure parameters is sound accordingly. The results of experiment and test show that rail pressure and injection pulse width as well as their mutual-effect have no influence on the injection quantity consistency, which proves that the structure parameters design is successful and performance of GD-1 system is sound. 展开更多
关键词 High pressure common rail fuel injection system Structure parameters design Variance analysis
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3D structure parameterization design and modeling for irregular structure of stope bottom 被引量:3
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作者 曾庆田 Wang Liguan 《High Technology Letters》 EI CAS 2016年第1期55-62,共8页
Stope mining design is a very important and complicated task in daily production design and technical management of an underground mine.Based on workface technology and human-computer interaction technology,this study... Stope mining design is a very important and complicated task in daily production design and technical management of an underground mine.Based on workface technology and human-computer interaction technology,this study introduces a method of 3D parametric design for the irregular structure of stope bottoms,and focuses on solving technical problems in surface modeling of stope bottom structure.Optimization of the minimum span length algorithm(MSLA) and the shortest path search algorithm(SPSA) is conducted to solve the problem of contour-line based instant modeling of stope bottom structures,which makes possible the 3D parametric design for irregular structure of stope bottom.Implementation process and relevant methods of the proposed algorithms are also presented.Feasibility and reliability of the proposed modeling method are testified in a case study.In practice,the proposed 3 D parameterization design method for irregular structure stope bottom proves to be very helpful to precise 3D parametric design.This method is capable of contributing to improved efficiency and precision of stope design,and is worthy of promotion. 展开更多
关键词 采场底部结构 参数化设计方法 不规则结构 建模方法 三维参数化设计 最短路径搜索算法 3维 人机交互技术
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Parameter design considerations for an oscillator IR-FEL 被引量:1
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作者 贾启卡 《Chinese Physics C》 SCIE CAS CSCD 2017年第1期187-194,共8页
An infrared oscillator FEL user facility will be built at the National Synchrotron Radiation Laboratory at in Hefei, China. In this paper, the parameter design of the oscillator FEL is discussed, and some original rel... An infrared oscillator FEL user facility will be built at the National Synchrotron Radiation Laboratory at in Hefei, China. In this paper, the parameter design of the oscillator FEL is discussed, and some original relevant approaches and expressions are presented. Analytic formulae are used to estimate the optical field gain and saturation power for the preliminary design. By considering both physical and technical constraints, the relation of the deflection parameter K to the undulator period is analyzed. This helps us to determine the ranges of the magnetic pole gap,the electron energy and the radiation wavelength. The relations and design of the optical resonator parameters are analyzed. Using dimensionless quantities, the interdependences between the radii of curvature of the resonator mirror and the various parameters of the optical resonator are clearly demonstrated. The effect of the parallel-plate waveguide is analyzed for the far-infrared oscillator FEL. The condition of the necessity of using a waveguide and the modified filling factor in the case of the waveguide are given, respectively. 展开更多
关键词 free electron laser OSCILLATOR parameters design
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Optimization of design parameters for controlled rocking steel braced dual-frames
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作者 Sobhan Ghasemi M.Firoozi Nezamabadi +1 位作者 Abdolreza S.Moghadam Mahmood Hosseini 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2022年第4期1053-1068,共16页
A controlled rocking concentrically steel braced frame(CR-CSBF)is introduced as an alternative to conventional methods to prevent major structural damage during large earthquakes.It is equipped with elastic post-tensi... A controlled rocking concentrically steel braced frame(CR-CSBF)is introduced as an alternative to conventional methods to prevent major structural damage during large earthquakes.It is equipped with elastic post-tensioned(PT)cables and replaceable devices or fuses to provide overturning resistance and dissipate energy,respectively.Although CR-CSBFs are not officially legalized in globally valid codes for new buildings,it is expected to be presented in them in the near future.The main goal of this study is to determine the optimal design parameters consist of the yield strength and modulus of elasticity of the fuse,the initial force of the PT cable,and the gravity load on the rocking column,considering different heights of the frame,spanning ratios and ground motion types for dual-configuration CR-CSBF.Nonlinear time-history analyses are performed in OpenSees.This study aims to define the optimal input variables as effective design parameters of CR-CSBFs by comparing four seismic responses consisting of story drift,roof displacement,roof acceleration and base shear,and also using the Euclidean metric optimization method.Despite the previous research,this study is innovative and first of its kind.The results demonstrate that the optimal design parameters are variable for various conditions. 展开更多
关键词 self-centering rocking steel braced frame design parameters OPTIMIZATION low damage
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Development of six sigma concurrent parameter and tolerance design method based on response surface methodology
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作者 张志红 何祯 《Journal of Pharmaceutical Analysis》 SCIE CAS 2008年第3期198-201,212,共5页
Using Response Surface Methodology (RSM), an optimizing model of concurrent parameter and tolerance design is proposed where response mean equals its target in the target being best. The optimizing function of the mod... Using Response Surface Methodology (RSM), an optimizing model of concurrent parameter and tolerance design is proposed where response mean equals its target in the target being best. The optimizing function of the model is the sum of quality loss and tolerance cost subjecting to the variance confidence region of which six sigma capability can be assured. An example is illustrated in order to compare the differences between the developed model and the parameter design with minimum variance. The results show that the proposed method not only achieves robustness, but also greatly reduces cost. The objectives of high quality and low cost of product and process can be achieved simultaneously by the application of six sigma concurrent parameter and tolerance design. 展开更多
关键词 six sigma concurrent parameter and tolerance design response surface methodology confidence region cost reduction
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PARAMETER COORDINATION AND ROBUST OPTIMIZATION FOR MULTIDISCIPLINARY DESIGN
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作者 HU Jie PENG Yinghong XIONG Guangleng 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第3期368-372,共5页
A new parameter coordination and robust optimization approach for multidisciplinary design is presented. Firstly, the constraints network model is established to support engineering change, coordination and optimizati... A new parameter coordination and robust optimization approach for multidisciplinary design is presented. Firstly, the constraints network model is established to support engineering change, coordination and optimization. In this model, interval boxes are adopted to describe the uncertainty of design parameters quantitatively to enhance the design robustness. Secondly, the parameter coordination method is presented to solve the constraints network model, monitor the potential conflicts due to engineering changes, and obtain the consistency solution space corresponding to the given product specifications. Finally, the robust parameter optimization model is established, and genetic arithmetic is used to obtain the robust optimization parameter. An example of bogie design is analyzed to show the scheme to be effective. 展开更多
关键词 Constraints network parameter coordination Robust design Multidisciplinary design
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Design for Optimization of Polymer-flooded Pumping Parameter
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作者 Yan Xizhao Sun Zhi +1 位作者 Wang Changsheng Duan Wensheng 《China Oil & Gas》 2000年第1期36-38,共3页
关键词 design for Optimization of Polymer-flooded Pumping parameter
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基于Revit二次开发的渡槽正向参数化智能建模方法
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作者 张延 姜国辉 +3 位作者 唐守艺 谷成麟 田世福 马天骁 《水电能源科学》 北大核心 2024年第3期137-141,共5页
针对渡槽工程在前期设计阶段单纯依靠Revit软件进行三维翻模,难以与渡槽工程实际建造节奏相匹配的问题,对Revit软件进行定制化开发,提出渡槽正向参数化智能建模方法,包括渡槽正向设计智能管理平台、渡槽构件模型参数化创建和渡槽钢筋参... 针对渡槽工程在前期设计阶段单纯依靠Revit软件进行三维翻模,难以与渡槽工程实际建造节奏相匹配的问题,对Revit软件进行定制化开发,提出渡槽正向参数化智能建模方法,包括渡槽正向设计智能管理平台、渡槽构件模型参数化创建和渡槽钢筋参数化建模三部分。该方法的建立实现了对渡槽水力参数、结构参数等的设计与分类管理,简化了繁琐的建模步骤,缩短了设计人员建模时间,提高了设计效率。结合具体渡槽工程实例,对渡槽正向参数化智能建模方法的准确性及实用性进行验证,前期设计阶段的工作效率得到显著提高,为BIM正向设计在水利工程领域进行推广应用提供了新的解决方案。 展开更多
关键词 REVIT 二次开发 渡槽 正向设计 参数化
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Design of integrated radar and communication system based on MIMO-OFDM waveform 被引量:19
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作者 Yongjun Liu Guisheng Liao +1 位作者 Zhiwei Yang Jingwei Xu 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2017年第4期669-680,共12页
Orthogonal frequency division multiplexing (OFDM) waveform enables radar and communication functions simultaneously, which encounters low angle resolution and poor data rate for traditional single input single output ... Orthogonal frequency division multiplexing (OFDM) waveform enables radar and communication functions simultaneously, which encounters low angle resolution and poor data rate for traditional single input single output (SISO) systems. To solve these problems, an integrated radar and communication system (IRCS) with multiple input multiple output (MIMO) OFDM waveform is proposed. The different limitations of radar and communication in designing such a system are investigated. Then, an optimization problem is devised to obtain suitable system parameters, including the number of subcarriers, subcarrier spacing, number of symbols, pulse repetition frequency (PRF) and length of cyclic prefix (CP). Finally, to satisfy the requirements of both radar and communication, the IRCS parameters are derived in three typical cases. Several numerical results are presented to illustrate the demands of radar and communication, inconsistent or consistent, for the IRCS parameters and the superiority of the proposed system. 展开更多
关键词 integrated radar and communication orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO) system parameter design
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采棉机风机叶片优化与流场分析
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作者 钟良意 张增磊 +3 位作者 宗超勇 蒋伟俊 石茂林 徐立章 《液压与气动》 北大核心 2024年第5期77-85,共9页
风机作为采棉机气力输送系统的核心部件,其性能优劣将影响采棉机的作业效率。为提高采棉机气力输送系统的最大风量,针对采棉机用多翼离心风机叶片进行优化设计。为了获得代理模型所需的基本数据,建立了CFD数值模型并采用拉丁超立方实验... 风机作为采棉机气力输送系统的核心部件,其性能优劣将影响采棉机的作业效率。为提高采棉机气力输送系统的最大风量,针对采棉机用多翼离心风机叶片进行优化设计。为了获得代理模型所需的基本数据,建立了CFD数值模型并采用拉丁超立方实验在设计空间内生成20组样本。基于样本数据,建立了出口风量与设计变量的近似模型,采用智能优化算法获得最优设计方案。优化后的设计方案相较于原型机,出口风速明显增大。CFD数值计算分析风机的动态特性,结果表明,在多转速工况下风量均有明显提升,其在额定转速工况下,风量提升17.27%。 展开更多
关键词 离心风机 采棉机 CFD 叶片参数化 优化设计
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