桥梁施工监控是桥梁施工技术的重要组成部分和确保桥梁施工质量的关键,也是桥梁建设的安全保证,已成为桥梁工程领域研究的重要内容。通过文献调研的方式,以"施工控制/监测/监控""施工控制理论/方法""施工监测...桥梁施工监控是桥梁施工技术的重要组成部分和确保桥梁施工质量的关键,也是桥梁建设的安全保证,已成为桥梁工程领域研究的重要内容。通过文献调研的方式,以"施工控制/监测/监控""施工控制理论/方法""施工监测系统""智能监测"等为关键词,在Web of Science、Science Direct及中国知网上搜索、整理了2020年度发表的60余篇科研论文,主要对学者们在桥梁施工控制理论方法、施工控制参数识别和状态预测、桥梁施工监测系统与智能监测等方面取得的研究进展进行了归纳、梳理和总结,并对今后桥梁施工控制研究的热点进行了展望。展开更多
Based on the idea of adjoint method and the dynamic evolution method,a new optimum aerodynamic design technique is presented in this paper.It can be applied to the optimum problems with a large number of design variab...Based on the idea of adjoint method and the dynamic evolution method,a new optimum aerodynamic design technique is presented in this paper.It can be applied to the optimum problems with a large number of design variables and is time saving.The key of the new method lies in that the optimization process is regarded as an unsteady evolution,i.e.,the optimization is executed,simultaneously with solving the unsteady flow governing equations and adjoint equations.Numerical examples for both the inverse problem and drag minimization using Euler equations have been presented,and the results show that the method presented in this paper is more efficient than the optimum methods based on the steady flow solution and the steady solution of adjoint equations.展开更多
This paper studies the stabilization problem of uniform Euler-Bernoulli beam with a nonlinear locally distributed feedback control. By virtue of nonlinear semigroup theory, energy-perturbed approach and polynomial mul...This paper studies the stabilization problem of uniform Euler-Bernoulli beam with a nonlinear locally distributed feedback control. By virtue of nonlinear semigroup theory, energy-perturbed approach and polynomial multiplier skill, the authors show that, corresponding to the different values of the parameters involved in the nonlinear locally distributed feedback control, the energy of the beam under the proposed feedback decays exponentially or in negative power of time t as t →∞.展开更多
文摘桥梁施工监控是桥梁施工技术的重要组成部分和确保桥梁施工质量的关键,也是桥梁建设的安全保证,已成为桥梁工程领域研究的重要内容。通过文献调研的方式,以"施工控制/监测/监控""施工控制理论/方法""施工监测系统""智能监测"等为关键词,在Web of Science、Science Direct及中国知网上搜索、整理了2020年度发表的60余篇科研论文,主要对学者们在桥梁施工控制理论方法、施工控制参数识别和状态预测、桥梁施工监测系统与智能监测等方面取得的研究进展进行了归纳、梳理和总结,并对今后桥梁施工控制研究的热点进行了展望。
文摘Based on the idea of adjoint method and the dynamic evolution method,a new optimum aerodynamic design technique is presented in this paper.It can be applied to the optimum problems with a large number of design variables and is time saving.The key of the new method lies in that the optimization process is regarded as an unsteady evolution,i.e.,the optimization is executed,simultaneously with solving the unsteady flow governing equations and adjoint equations.Numerical examples for both the inverse problem and drag minimization using Euler equations have been presented,and the results show that the method presented in this paper is more efficient than the optimum methods based on the steady flow solution and the steady solution of adjoint equations.
基金This research is supported by the National Science Foundation of China under Grant Nos. 10671166 and 60673101.
文摘This paper studies the stabilization problem of uniform Euler-Bernoulli beam with a nonlinear locally distributed feedback control. By virtue of nonlinear semigroup theory, energy-perturbed approach and polynomial multiplier skill, the authors show that, corresponding to the different values of the parameters involved in the nonlinear locally distributed feedback control, the energy of the beam under the proposed feedback decays exponentially or in negative power of time t as t →∞.