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基于传递函数标定法的异型盾构隧道地铁列车运行振动分析 被引量:1
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作者 张啟乐 董连东 +3 位作者 刘林芽 拜立岗 马广驰 李枫 《城市轨道交通研究》 北大核心 2021年第12期141-145,共5页
基于某城市地铁的异型盾构隧道,采用实际场地传递函数标定数值模型的方法,对异型盾构隧道地铁振动问题进行了研究。研究结果表明:异型盾构隧道埋深增加量与Z振级衰减量不是线性关系;单从地铁环境振动控制角度而言,存在1个最佳经济埋深,... 基于某城市地铁的异型盾构隧道,采用实际场地传递函数标定数值模型的方法,对异型盾构隧道地铁振动问题进行了研究。研究结果表明:异型盾构隧道埋深增加量与Z振级衰减量不是线性关系;单从地铁环境振动控制角度而言,存在1个最佳经济埋深,本算例的最佳经济埋深为15~20 m;地铁列车运行引起的80 Hz以上频段的振动衰减非常快,传至地面时振动峰值频率为63 Hz;若采用钢弹簧浮置板进行隔振,隧道正上方地面位置Z计权总振级可以减小14.6 dB。 展开更多
关键词 地铁振动 异形盾构隧道 传递函数标定
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多种遗传算法在函数优化方面的性能比较分析 被引量:6
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作者 齐畅 王冬霞 韩颖 《辽宁工业大学学报(自然科学版)》 2013年第5期290-293,共4页
进行了4种常用的遗传算法(适值函数标定遗传算法、顺序选择遗传算法、两点交叉遗传算法和自适应遗传算法)在求函数最优解问题上的性能比较分析,并采用MATLAB进行仿真。仿真结果表明,除两点交叉遗传算法外,在求函数最优解问题上适值函数... 进行了4种常用的遗传算法(适值函数标定遗传算法、顺序选择遗传算法、两点交叉遗传算法和自适应遗传算法)在求函数最优解问题上的性能比较分析,并采用MATLAB进行仿真。仿真结果表明,除两点交叉遗传算法外,在求函数最优解问题上适值函数标定遗传算法、顺序选择遗传算法和自适应遗传算法均表现出了较好的稳定性,同时所求得的函数最优解均较准确。其中,顺序选择遗传算法在求函数最优解方面性能最好。 展开更多
关键词 适值函数标定遗传算法 顺序选择遗传算法 两点交叉遗传算法 自适应遗传算法 函数最优解
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基于模糊推理的驾驶员车速决策行为建模及其标定
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作者 齐玉东 丁通 杨松 《四川兵工学报》 CAS 2014年第6期115-120,139,共7页
为模拟驾驶员在行驶过程中处理不确定信息的能力,并解决以往微观交通仿真中自由行驶与跟驰状态相互转换时的不平滑问题,对将2种行为综合起来的车速决策行为建立模糊推理(fuzzy inference system,FIS)模型。提出了一种隶属度函数参数化... 为模拟驾驶员在行驶过程中处理不确定信息的能力,并解决以往微观交通仿真中自由行驶与跟驰状态相互转换时的不平滑问题,对将2种行为综合起来的车速决策行为建立模糊推理(fuzzy inference system,FIS)模型。提出了一种隶属度函数参数化设计方法来解决FIS模型的标定问题。以车头时距、相对速度、期望速度差作为输入,加速度作为输出,结合专家经验构建模糊规则,建立了FIS模型。采用美国公路署NGSIM(next generation simulation)项目免费提供的车辆行驶数据,在对数据筛选、预处理的基础上,通过对驾驶员反应时间标定、期望车速设定,构造了模型的输入输出数据,并对模型参数利用遗传算法进行了标定。标定后的FIS模型对实际行驶数据有良好的拟合精度;通过想定实验,证明在模型较好地解决了状态转换的不平滑问题;最后对模型在跟驰状态下表现与GM模型进行了比较,结果表明标定后的FIS模型略优些,说明本文建立的参数化车速决策FIS模型具有良好的实用价值和应用前景。 展开更多
关键词 模糊推理 隶属度函数标定 车速决策 跟驰 反应时间标定
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用电涡流传感器测量轮辋尺寸的方法及误差分析 被引量:5
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作者 涂军 周文祥 《工具技术》 北大核心 2003年第9期45-48,共4页
通过应用电涡流传感器扫描测量轮辋尺寸的试验 ,及时对不同的测量区段进行标定 ,确定各个测量区段的标定函数 ,测量轮辋尺寸 。
关键词 铁路货车 轮辋 尺寸测量 电涡流传感器 误差分析 测量方法 标定函数
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数字光谱分析仪的应用软件设计 被引量:1
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作者 刘冬梅 潘永刚 +2 位作者 张燃 王晓娟 夏日辉 《长春理工大学学报(自然科学版)》 2012年第3期64-67,共4页
通过对数字光谱分析仪总体结构的分析,使用Visual C++6.0编译环境和C++编程语言设计开发了光谱分析软件,该软件包含文件管理、数据采集、数据处理以及软件设置等功能,各部分又包含相应的功能以实现光谱信号的采集、处理、标定、设置等... 通过对数字光谱分析仪总体结构的分析,使用Visual C++6.0编译环境和C++编程语言设计开发了光谱分析软件,该软件包含文件管理、数据采集、数据处理以及软件设置等功能,各部分又包含相应的功能以实现光谱信号的采集、处理、标定、设置等。在文章中详细介绍了如何根据应用需求在Visual C++6.0编译环境中建立一个新的类库及所需要的功能函数、各功能模块的设计思想和设计流程。该系统适用于远距离物体的可见及近红外光谱探测,实验结果表明,该数字光谱分析软件具有较好的封装性、可移植性、准确性、可重复性及实用性。 展开更多
关键词 数字光谱分析软件 SAL类 付里叶变换 寻峰标定函数
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层析粒子图像测速技术研究进展 被引量:7
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作者 李晓辉 王宏伟 +1 位作者 黄湛 赵俊波 《实验流体力学》 CAS CSCD 北大核心 2021年第1期86-96,共11页
层析粒子图像测速技术(Tomographic Particle Image Velocimetry,Tomo-PIV)作为一种瞬时的三维流场速度测量技术,能够为具有强非定常性及强三维空间性的复杂流动提供详细的数据支撑。对近年来该技术在国内外的发展及应用进行了全面的综... 层析粒子图像测速技术(Tomographic Particle Image Velocimetry,Tomo-PIV)作为一种瞬时的三维流场速度测量技术,能够为具有强非定常性及强三维空间性的复杂流动提供详细的数据支撑。对近年来该技术在国内外的发展及应用进行了全面的综述。首先介绍了层析粒子图像测速技术的工作原理和技术特点,进而探讨了当前层析粒子图像测速的研究现状,重点从相机布局、示踪粒子密度、标定映射函数及三维重构算法对重构精度的影响等方面进行了阐述,而后通过国内外关于层析粒子图像测速技术的典型应用,展示了该技术在非定常三维流动及工程应用中的优势。最后,对层析粒子图像测速技术的应用前景及发展趋势进行了展望。 展开更多
关键词 Tomo-PIV 三维流动 标定函数 三维重构 非定常流场
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感应式磁力仪MFS06e的磁场记录时域分析
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作者 蒋礼 《传感技术学报》 CAS CSCD 北大核心 2021年第7期939-943,共5页
GMS电磁测深系统仅能显示磁力仪所记录的最初电压值以及最终的阻抗估计结果,但无法显示真实的磁场记录。只有去除磁力仪的频率响应函数,才能将电压记录(毫伏)转换为磁场记录(纳特)。以感应式磁力仪MFS06e为例,分别以标定函数和标定文件... GMS电磁测深系统仅能显示磁力仪所记录的最初电压值以及最终的阻抗估计结果,但无法显示真实的磁场记录。只有去除磁力仪的频率响应函数,才能将电压记录(毫伏)转换为磁场记录(纳特)。以感应式磁力仪MFS06e为例,分别以标定函数和标定文件构造出磁力仪的频率响应函数,进而针对相同的三分量感应电压记录进行去仪器响应实验。对比结果显示,使用标定函数和标定文件所得的磁场记录在幅度上基本一致,但在相位上存在一定的差异。在低频段,由标定函数所得磁场的相位超前于由标定文件所得磁场;但在高频段,结果却完全相反。 展开更多
关键词 地球科学仪器 感应式磁力仪 标定函数 标定文件 频率响应函数
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关于推行地震观测中震级测定新方法的简要说明
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作者 N.V.Kondorskaya 《地震译文集》 1990年第1期52-56,共5页
关键词 地震观测 震级 标定函数 均匀震级系统法 Prague公式
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沥青路面平整度测量统计分析
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作者 李蕊 吴勇 《山东交通科技》 2016年第1期16-19,共4页
通过引入波形函数对行驶质量中级及以上的沥青路面进行模拟,分析连续式平整度仪的测量原理,借由数据统计方法得出由计算区间的值估算检测路段平整度值的方法;通过分析国际平整度指数与路面行驶质量指数和连续式平整度仪标准差的关系,得... 通过引入波形函数对行驶质量中级及以上的沥青路面进行模拟,分析连续式平整度仪的测量原理,借由数据统计方法得出由计算区间的值估算检测路段平整度值的方法;通过分析国际平整度指数与路面行驶质量指数和连续式平整度仪标准差的关系,得出行驶质量指数与连续式平整度仪标准差之间的标定关系,由此得出沥青路面需要养护、维修和改建的平整度临界值。 展开更多
关键词 道路工程 平整度 正弦波形 函数标定 临界值
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西江A油田油藏数值模拟
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作者 戴涛 张世明 +1 位作者 谭保国 梁卫 《重庆大学学报(自然科学版)》 EI CAS CSCD 2000年第z1期97-99,110,共4页
西江A油田是一个多油藏油田 ,已投入开发四年多。目前油藏需解决的主要问题 :一是评价K34油藏的原油原始地质储量 ;二是主力油藏的水淹状况及油田开发潜力。笔者应用油藏数值模拟手段 ,运用饱和度函数标定技术及油藏含水饱和度拟合技术... 西江A油田是一个多油藏油田 ,已投入开发四年多。目前油藏需解决的主要问题 :一是评价K34油藏的原油原始地质储量 ;二是主力油藏的水淹状况及油田开发潜力。笔者应用油藏数值模拟手段 ,运用饱和度函数标定技术及油藏含水饱和度拟合技术精确建立了油藏模型 ;在历史拟合基础上 ,通过对油水运动规律的分析 ,对K34油藏的原始地质储量及各油藏动用状况及潜力进行了评价。 展开更多
关键词 数值模拟 饱和度函数标定 储量 历史拟合 底水油藏
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New self-calibration approach to space robots based on hand-eye vision 被引量:3
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作者 刘宇 刘宏 +1 位作者 倪风雷 徐文福 《Journal of Central South University》 SCIE EI CAS 2011年第4期1087-1096,共10页
To overcome the influence of on-orbit extreme temperature environment on the tool pose(position and orientation) accuracy of a space robot,a new self-calibration method based on a measurement camera(hand-eye vision) a... To overcome the influence of on-orbit extreme temperature environment on the tool pose(position and orientation) accuracy of a space robot,a new self-calibration method based on a measurement camera(hand-eye vision) attached to its end-effector was presented.Using the relative pose errors between the two adjacent calibration positions of the space robot,the cost function of the calibration was built,which was different from the conventional calibration method.The particle swarm optimization algorithm(PSO) was used to optimize the function to realize the geometrical parameter identification of the space robot.The above calibration method was carried out through self-calibration simulation of a six-DOF space robot whose end-effector was equipped with hand-eye vision.The results showed that after calibration there was a significant improvement of tool pose accuracy in a set of independent reference positions,which verified the feasibility of the method.At the same time,because it was unnecessary for this method to know the transformation matrix from the robot base to the calibration plate,it reduced the complexity of calibration model and shortened the error propagation chain,which benefited to improve the calibration accuracy. 展开更多
关键词 space robot SELF-CALIBRATION cost function hand-eye vision particle swarm optimization algorithm
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A multi-objective gravitational search algorithm based approach of power system stability enhancement with UPFC 被引量:6
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作者 Ajami Ali Armaghan Mehdi 《Journal of Central South University》 SCIE EI CAS 2013年第6期1536-1544,共9页
On the basis of the theoretical analysis of a single-machine infinite-bus (SMIB), using the modified linearized Phil- lips-Heffron model installed with unified power flow controller (UPFC), the potential of the UP... On the basis of the theoretical analysis of a single-machine infinite-bus (SMIB), using the modified linearized Phil- lips-Heffron model installed with unified power flow controller (UPFC), the potential of the UPFC supplementary controller to enhance the dynamic stability of a power system is evaluated by measuring the electromechanical controllability through singular value decomposition (SVD) analysis. This controller is tuned to simultaneously shift the undamped electromeehanical modes to a prescribed zone in the s-plane. The problem of robust UPFC based damping controller is formulated as an optimization problem according to the eigenvalue-based multi-objective function comprising the damping factor, and the damping ratio of the undamped electromechanical modes to be solved using gravitational search algorithm (GSA) that has a strong ability to find the most optimistic results. The different loading conditions are simulated on a SMIB system and the rotor speed deviation, internal voltage deviation, DC voltage deviation and electrical power deviation responses are studied with the effect of this flexible AC transmission systems (FACTS) controller. The results reveal that the tuned GSA based UPFC controller using the proposed multi-objective function has an excellent capability in damping power system with low frequency oscillations and greatly enhances the dynamic stability of the power systems. 展开更多
关键词 unified power flow controller gravitational search algorithm power system stability
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Construction of Finite Element Multiscaling Function with Three Coefficients
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作者 LI Rui 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2006年第2期236-241,共6页
The aim of this paper is to present construction of finite element multiscaling function with three coefficients. In order to illuminate the result, two examples are given finally.
关键词 finite element multiscaling function approximation order
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Construction of Compactly Supported Bivariate Orthogonal Wavelets
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作者 YANGJian-wei ZHANGLing-ling 《Chinese Quarterly Journal of Mathematics》 CSCD 2003年第3期242-246,共5页
For a given compactly supported scaling fun ct ion supported over [0,3]×[0,3], we present an algorithm to construct compac t ly supported orthogonal wavelets. By this algorithm, the symbol function of the associa... For a given compactly supported scaling fun ct ion supported over [0,3]×[0,3], we present an algorithm to construct compac t ly supported orthogonal wavelets. By this algorithm, the symbol function of the associated wavelets can be constructed explicitly. 展开更多
关键词 WAVELET compactly supported scaling function ortho normal
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Scaling Behavior of an Aggregation-Migration Model
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作者 KEJian-Hong LINZhen-Quan ZHUANGYou-Yi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2004年第5期781-786,共6页
We study the kinetic behavior of a two-species aggregation-migration model in which an irreversible aggregation occurs between any two clusters of the same species and a reversible migration occurs simultaneously betw... We study the kinetic behavior of a two-species aggregation-migration model in which an irreversible aggregation occurs between any two clusters of the same species and a reversible migration occurs simultaneously between two different species. For a simple model with constant aggregation rates and with the migration rates and , we find that the evolution behavior of the system depends crucially on the values of the indexes υ<SUB>1</SUB> and υ<SUB>2</SUB>. The aggregate size distribution of either species obeys a conventional scaling law for most cases. Moreover, we also generalize the two-species system to the multi-species case and analyze its kinetic behavior under the symmetrical conditions. 展开更多
关键词 kinetic behavior aggregation-migration process scaling law
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FUZZY ALGEBRA IN TRIANGULAR NORM SYSTEM
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作者 宋晓秋 潘志 《Journal of China University of Mining and Technology》 1994年第1期125-130,共6页
Triangular norm is a powerful tool in the theory research and application development of fuzzy sets. In this paper, using the triang norm, we introduce some concepts such as fuzzy algebra, fuzzy a algebra and fuzzy mo... Triangular norm is a powerful tool in the theory research and application development of fuzzy sets. In this paper, using the triang norm, we introduce some concepts such as fuzzy algebra, fuzzy a algebra and fuzzy monotone class, and discuss the relations among them,obtaining the following main conclusions:Theorem 1: Let (I,S,T,C) be a norm spetem, S and T be dual norm,(Ⅰ) If is a fuzzy σ algebra, then is also a fuzzy monotooe class;(Ⅱ ) If a fuzzy algebra is a fuzzy monotone class, then is also a fuzzy σ algebra.Theorem 2: If φ(X) is a fuzzy algebra, then m (φ) =σ(φ). 展开更多
关键词 fuzzy algebra fuzzy σ algebra fuzzy monotone class triangular norm system
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Discontinuous flying particle swarm optimization algorithm and its application to slope stability analysis 被引量:10
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作者 李亮 于广明 +1 位作者 陈祖煜 褚雪松 《Journal of Central South University》 SCIE EI CAS 2010年第4期852-856,共5页
A new version of particle swarm optimization(PSO) called discontinuous flying particle swarm optimization(DFPSO) was proposed,where not all of the particles refreshed their positions and velocities during each iterati... A new version of particle swarm optimization(PSO) called discontinuous flying particle swarm optimization(DFPSO) was proposed,where not all of the particles refreshed their positions and velocities during each iteration step and the probability of each particle in refreshing its position and velocity was dependent on its objective function value.The effect of population size on the results was investigated.The results obtained by DFPSO have an average difference of 6% compared with those by PSO,whereas DFPSO consumes much less evaluations of objective function than PSO does. 展开更多
关键词 slope stability limit equilibrium method factor of safety particle swarm optimization.
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Determination of Scaling Parameter and Dynamical Resonances in Complex-Rotated Hamiltonian Ⅰ:Theory
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作者 ZHAO Fang ZHAO Mei-Shan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第3期599-606,共8页
In this paper we present a theoretical analysis on the determination of the scaling parameter in the complex-rotated Hamiltonian, which has served as a basis for successful applications of the rigged Hilbert space the... In this paper we present a theoretical analysis on the determination of the scaling parameter in the complex-rotated Hamiltonian, which has served as a basis for successful applications of the rigged Hilbert space theory for resonances. Based on the complex energy eigenvalue, E(θ) = ER(θ) - iГ(θ)/2, as a function of the scaling parameter θ, we find that for potential barrier scattering, the condition dГ(θI)/dθ = 0 uniquely determines the scaling parameter 8. The condition d ER (θR)/ dθ = 0 is merely a consequence of the Virial theorem and θI =θR is not a necessary condition for a resonance state. We also provide a harmonic approximation formMism for resonances in scattering over a potential barrier. 展开更多
关键词 complex-rotated Hamiltonian potential scattering resonances rigged Hilbert space
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A Parallel Integration Method of Cooperative Target-Localization and Cooperative Self-localization
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作者 WANG Leigang KONG Depei +1 位作者 ZHOU Jihang WANG Jianlu 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2022年第2期231-238,共8页
When a group of mobile agents track a target,they can locate themselves and the target in a cooperative manner.To maximize the group advantage,a parallel integration strategy of cooperative target-localization(CTL)and... When a group of mobile agents track a target,they can locate themselves and the target in a cooperative manner.To maximize the group advantage,a parallel integration strategy of cooperative target-localization(CTL)and cooperative self-localization(CSL)is designed.Firstly,a global cost function containing the agents’positions and the target’s position is established.Secondly,along with the agents’positions being re-estimated during CTL,the Utransform is employed to propagate the error covariance of the position estimations among the agents.The simulation results show that,the proposal exploits more information for locating the target and the agents than the cases where CTL and CSL run separately,and the global optimal position estimations of the agents and the target are obtained. 展开更多
关键词 cooperative self-localization cooperative target-localization non-classical multi-dimensional scaling majoring function
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Determination of Scaling Parameter and Dynamical Resonances in Complex-Rotated Hamiltonian Ⅱ: Numerical Analysis
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作者 ZHAO Fang ZHAO Mei-Shan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第3期607-612,共6页
This paper is concerned with the determination of a unique scaling parameter in complex scaling analysis and with accurate calculation of dynamics resonances. In the preceding paper we have presented a theoretical ana... This paper is concerned with the determination of a unique scaling parameter in complex scaling analysis and with accurate calculation of dynamics resonances. In the preceding paper we have presented a theoretical analysis and provided a formalism for dynamical resonance calculations. In this paper we present accurate numerical results for two non-trivial dynamical processes, namely, models of diatomic molecular predissociation and of barrier potential scattering for resonances. The results presented in this paper confirm our theoretical analysis, remove a theoretical ambiguity on determination of the complex scaling parameter, and provide an improved understanding for dynamical resonance calculations in rigged Hilbert space. 展开更多
关键词 complex-rotated Hamiltonian predissociation resonances potential scattering
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