Analysis on the land use and cover change in Tianjin Binhai New Area based on the remote sensing

采用全国土地分类系统,基于lAndSAT卫星TM遥感影像与天津滨海新区1:50,000地形图,进行相应数据处理,编制出2000年、2005年、2010年三期滨海新区土地利用/覆盖分类图,并运用土地利用转移矩阵对近10年来天津滨海新区土地利用/覆盖变化进行定量分析。在此基础上,进一步分析了经济、人口等驱动因子对土地利用/土地覆盖的影响。结果表明:十年间,滨海新区的建筑用地面积增加显著,而绿地、湿地、滩涂等高生态价值的土地向建筑用地、未利用地等开发建设用地大幅度转化,后五年变化尤为显著。This paper carries out quantitative analysis on the land use/cover(LU/C) change of Tianjin Binhai New Area in recent 10 years through using land use transition matrix from the three-stage LU/C classification maps of 2000, 2005 and 2010 drafted by means of the National Land Classification System of China based on Landsat TM satellite remote sensing image and the Tianjin Binhai New Area 1:50 000 relief maps.On this basis, the impact of such driving factors as the economy and population on LU/C is further analyzed.The results show that the area of the building land in Binhai New Area has increased significantly over the ten years, and the greenland, wetland, and shoals of high ecological value have been dramatically transformed into the building land and unused land for the development and construction, and the change is more significant in the later five years

创新创业导向的专业课程体验式教学设计——以高职印刷媒体技术专业为例

如何通过实践体验促进学生掌握专业相关知识与技能,培养创新创业意识,使其更好适应实际工作岗位,是如今高职教育的重要命题。本文对高职印刷技术专业课程进行了创新创业视角下的体验式教学设计,并通过具体教学流程的实施来探讨该模式应用的有效性。</jats:p

Computational methods and engineering applications of static/dynamic aeroelasticity based on CFD/CSD coupling solution

The CFD/CSD coupling method is turning into the main research direction for the static/dynamic aeroelastic analyses. If one wants to use the method for the complex engineering aeroelastic problems, he needs to investigate the relative aeroelastic algorithms, such as the numerical computational method of unsteady aerodynamic forces, equivalent low-dimensional structural finite element model and the solution method of structural dynamic equations, data transfer technique between fluid and structure, the moving grid method, etc. Besides, he also needs to improve the computational efficiency by such as massive parallel CFD algorithm, reduced-order model (ROM) of unsteady aerodynamic forces, etc. In this paper, based on the authors&rsquo; recent investigations, the research progresses in computational aeroelastic methods and their applications to engineering problem are summarized.</div

基于CFD 静/动气动弹性计算方法和工程应用研究

计算流体力学耦合结构力学分析静/动气动弹性已成为气动弹性研究的主流。其能否用于型号工程中的气动弹性问题分析，一方面需要研究非定常气动力数值模拟方法、等效低维结构有限元模型及结构动力学方程求解方法、流体/结构数据转换方法和动网格技术等，解决计算气动弹性的算法问题。另一方面需要研究CFD并行计算技术、非定常气动力降阶模型，解决计算气动弹性的效率问题。本文综述课题组近年来在基于CFD静/动气动弹性计算方法方面的研究进展和在航空航天型号中部分应用

基于LMD能量熵的齿轮箱故障诊断研究

针对小样本情况下齿轮箱复合故障特征难以识别的问题，提出了基于局部均值分解（Local mean decomposition，LMD）能量熵的齿轮箱故障诊断方法。利用LMD方法对齿轮箱振动信号进行处理，得到若干个PF分量；利用不同状态下齿轮箱振动信号在频域区间内分布不均的特性，计算出分量能量在频域区间离散的值，即LMD能量熵；通过不同状态下LMD能量熵的分布进行了齿轮箱故障分类。结果显示，在小样本情况下，基于LMD能量熵方法能够精确地对齿轮箱故障类型进行特征提取和故障诊断，也表明了该方法对齿轮箱故障诊断的优越性