基于零阶优化方法的无人机复合材料进气道结构优化与分析

在综述优化设计理论研究的基础上,运用ANSYS分析软件,采用零阶优化方法,对某型无人机进气道复合材料层合板结构进行初始铺层的强度和刚度分析,在此基础上对其铺层厚度和铺层比例进行优化.采用两种优化方案,一种是在载荷一定的情况下求得尽可能轻的重量;另一种是在厚度一定的情况下调整铺层比例,使结构的承载能力更强.在得到ANSYS优化结果后再对其进行修正.优化结果显示,通过优化能进一步减轻结构重量,增强结构的承载能力.     

三维四向编织复合材料接头承载能力分析

针对三维四向编织复合材料单耳承力接头,用细观力学和均匀化方法分析三维编织复合材料的细观结构,用MATLAB程序对复合材料弹性性能进行参数化求解,利用ANSYS估算两种几何尺寸试样的破坏载荷.有限元计算结果与试验值有较好的吻合,显示文中方法可以满足工程设计和分析的要求.     

在线质量仪表在炼油装置上的维护

本文介绍了在线质量仪表在炼油装置上的应用情况,并着重就仪表在现场经常出现的故障及故障处理办法作了详细地分析和总结,为用户及在线质量仪表维护人员提供了一定的技术支持.     

Robust visual tracking algorithm based on Monte Carlo approach with integrated attributes

To improve the reliability and accuracy of visual tracker,a robust visual tracking algorithm based on multi-cues fusion under Bayesian framework is proposed.The weighed color and texture cues of the object are applied to describe the moving object.An adjustable observation model is incorporated into particle filtering,which utilizes the properties of particle filter for coping with non-linear,non-Gaussian assumption and the ability to predict the position of the moving object in a cluttered environment and two complementary attributes are employed to estimate the matching similarity dynamically in term of the likelihood ratio factors;furthermore tunes the weight values according to the confidence map of the color and texture feature on-line adaptively to reconfigure the optimal observation likelihood model,which ensured attaining the maximum likelihood ratio in the tracking scenario even if in the situations where the object is occluded or illumination,pose and scale are time-variant.The experimental result shows that the algorithm can track a moving object accurately while the reliability of tracking in a challenging case is validated in the experimentation.