Hypersonic vehicle aerodynamic design using modified sequential approximate optimization

Hypersonic vehicles are receiving increased attention within the aerospace community due to their high cruise speed and long-range capabilities. In this paper, a modified Sequential Approximate Optimization method is proposed for an optimized aerodynamic design of a hypersonic vehicle. As part of this approach, a constrained experimental design method is developed to handle the constraints more efficiently. A radial basis function is used to surrogate time-consuming CFD analysis. An efficient and more robust numerical mesh morphing scheme for the hypersonic vehicle is developed for the generation of high-quality meshes. Within this paper, a novel adaptive infilling strategy is proposed which uses an inaccurate search technique coupled with an elite archive. This allows the location of a more promising sample region and hence improves the surrogate accuracy, thereby further enhancing the optimization efficiency. A hypersonic vehicle aerodynamic design problem is solved using the proposed approach and satisfactory results are obtained at much lower computational costs. The lift-to-drag ratio is increased by 23.8% when compared with the base configuration while also satisfying the volume and lift constraints. The pressure and Mach contours have been compared with those of the base configuration and the results demonstrate the strength of the optimized configuration. The modified sequential approximate optimization for designing an improved hypersonic vehicle is worth referencing in future work.     

机器人系统跟踪控制的一种新策略

 本文研究了多个机器人完成某物体的跟踪问题。提出了一种“主辅型”控制策略。这种控制策略具有自组织性质,它自动地解决了机器人系统控制的不唯一性、自相矛盾的可能性,保证了各机器人间的合作与谐调。仿真结果表明跟gr误差极小。     

用人工智能搜索策略进行抗疲劳优化设计

 将人工智能搜索策略应用于抗疲劳优化设计中,针对工程实际中大量存在的离散变量的优化问题,提出了一套不同于传统数学规划法的方法,从根本上解决了处理离散变量的困难。还以多钉多层板接头为算例,作了优化计算,说明本文提出的方法可行,计算程序适用。并且优化结果比数学规划法好。     

基于改进人工蜂群算法的多值属性系统故障诊断策略

针对实际工程应用中常见的多值属性系统故障诊断策略问题,在传统人工蜂群算法(Artificial Bee ColonyAlgorithm,简称 ABC算法)的基础上,提出改进蜂群算法用于多值属性系统的测试序列寻优。首先,在蜂群算法中重新定义多值 D矩阵和五元组的含义;其次,引入方向信息概率矩阵,设置状态转移规则和矩阵元素更新策略;最后,采用导弹舵系统实例说明算法的实现过程和有效性。最终测试序列寻优结果表明:与传统的多值 Rollout算法相比,文中所提算法能得到较好的诊断策略结果,具有一定的应用价值。     

Distributed online mission planning for multi-player space pursuit and evasion

There are three important roles in evasion conflict: pursuer, target and defender. Pur-suers’ mission is to access targets;targets’ mission is to escape from pursuers’ capture;defenders’ mission is to intercept pursuers who are potentially dangerous to targets. In this paper, a distributed online mission plan (DOMP) algorithm for pursuers is proposed based on fuzzy evaluation and Nash equilibrium. First, an integrated effectiveness evaluation model is given. Then, the details of collaborative mission planning which includes the co-optimization of task distributing, trajectory and corresponding maneuvering scheme are presented. Finally, the convergence and steadiness of DOMP are discussed with simulation results. Compared with centralized mission planning, DOMP is more robust and can greatly improve the effectiveness of pursuing. It can be applied to dynamic scenario due to its distributed architecture.     

航空公司航线重组探讨

三大航空集团成立后，合理地调整航线成为企业再生产的基础。航线资源的重组要符合航空公司经营策略，即低成本策略、差异策略还是集中一点策略。在分析经营战略特点的基础上．研究了航线重组的策略。每种策略都要本着提高航线网络的质量和航班效率的原则。     

高等教育结构存在的主要问题与创新——以河南省为例

河南省高等教育结构目前尚存在学科专业结构不舍理、产学研相结合未形成良性互动机制、高层次研发人才培养能力不足和高等职业教育人才培养模式还需优化等问题。要切实落实河南省高等教育基础性、先导性、全局性的战略地位，在确立适度超前发展的理念下，坚持可持续发展、本土化、开放协作和生态和谐的原则，以培育高等教育园区发展极作为河南高等教育结构创新的战略目标，以和谐的生态结构作为结构创新的基本形态，以学科专业调整与发展作为结构创新的核心工作，以产学研有效结合作为结构创新的突破口，全力推进河南省高等教育结构的创新。     

An object-level strategy for pan-sharpening quality assessment of high-resolution satellite imagery

Current satellite imaging systems offer a trade-off between high spatial and high spectral resolution providing panchromatic images at a higher spatial resolution and multispectral images at a lower spatial resolution but rich in spectral information while a wide range of applications need the highest level of this information, simultaneously. Image fusion techniques as means of enhancing the information content of initial panchromatic and multispectral images produce new images, titled pan-sharpened, which inherent the advantages of the initial images. Considering the impact of fusion accuracy on the quality of corresponding applications, it is necessary to evaluate the quality of these processed images. During the last decade, a lot of quality evaluation metrics have been proposed which are mostly inspired by traditional image quality metrics. These methods are mostly based on applying quality metrics at the pixel level and evaluating final quality value based on averaging of obtained metric values through the whole image. However, obtained results clearly show that the behaviour of image fusion quality is inconsistent amongst different image objects. In this article, by applying image fusion quality metrics (IFQMs) to image objects, an object-level strategy for quality assessment of the image fusion process is proposed. The proposed strategy is applied to different satellite imagery covering residential and agricultural areas. Experimental results show higher capabilities of object-level quality assessment strategy in the quality assessment of the fusion process. Evaluating fusion quality at the object level provides the potential of fusion quality assessment for each individual image object in compliance with different parameters such as the type of objects and the effective size of objects in data set.     

基于VxWorks的空调系统控制软件设计

基于Vx Works软件环境,针对空调系统工作模式多、工作模式之间逻辑复杂等特点开发了空调系统的控制软件。将系统的功能按照任务优先权行划分,并采用状态转换机实现的模式间的转换。通过Tornado软件调试环境,对软件设计进行了修改和完善,保证了空调系统软件的正确性。     

高校协同创新型人才培养机制问题研究

高校协同创新型人才培养问题是基于胡锦涛在庆祝清华大学建校100周年大会上的重要讲话基础上,我国启动的“2011计划”过程中,伴随着我国协同创新问题的研究而出现的,它在协同创新领域的研究中具有重要的意义和地位.主要在分析了高校协同创新型人才的特点的基础上,提炼出高校协同创新型人才培养要素,根据各要素的作用,最终总结了构建高校协同创新型人才培养的机制.