This paper discusses the innovative ways of history teaching in depth from the unique perspective of art.By analyzing how artistic elements can effectively enrich teaching means and contents,it reveals the important v...This paper discusses the innovative ways of history teaching in depth from the unique perspective of art.By analyzing how artistic elements can effectively enrich teaching means and contents,it reveals the important value of art in history teaching for the improvement of students’comprehensive literacy and further explores the role of art in promoting the modern transformation of history education.At the same time,the article also focuses on the challenges faced in practice,such as the lack of artistic qualities among teachers,the difficulties in integrating art and history,and the differences in students’acceptance.To cope with these challenges,the article proposes specific implementation strategies,including the integration of diversified art resources,innovative teaching methods and approaches,and the construction of a scientific and reasonable evaluation mechanism,aiming to comprehensively optimize the effectiveness of history teaching and further stimulate students’potential for all-round development.展开更多
By consideration of the characteristics of martensitic transformation and the derivation from the application of the group theory to martensitic transformation, it may be concluded that the shape memory effect (SME) c...By consideration of the characteristics of martensitic transformation and the derivation from the application of the group theory to martensitic transformation, it may be concluded that the shape memory effect (SME) can be attained in materials through a martensitic transformation and its reverse transformation. only when there forms single or nearly single variant of martensite, with an absence of the factors causing the generation of the resistance against SME. on this principle, various shape memory materials including nonferrous alloys. iron-based alloys and ceramics containjng zirconia are expected to be further developed. A criterion for thermoelastic martensitic transformation is presented, Factors which may act as the resistance against SME in various materials are briefly described展开更多
Existing methods for recognizing polygons can be improved. A new concept ＂homograph＂ and then a new method for recognizing polygons based on the principle of homograph are proposed. First, five topological character...Existing methods for recognizing polygons can be improved. A new concept ＂homograph＂ and then a new method for recognizing polygons based on the principle of homograph are proposed. First, five topological characteristics and geometrical characteristics are introduced that are invariant to describe polygon under perspective transformation. Then, the new concept of homograph is defined in terms of five topological characteristics and geometrical characteristics. Based on this definition, a new algorithm is proposed for recognizing that two polygons are homograph. The topological structure is introduced to analyze homograph qualitatively and the algorithm is insensitive to noises; and the geometrical structure is introduced to analyze homograph quantitatively, thus the algorithms can show tiny differences between polygons. It can not only recognize the objects with different shapes but also distinguish between objects with same shape but with different sizes and scales. Comparing with other recognition algorithms, the algorithm presented showed apparent improvement. The effectiveness of the algorithm is demonstrated by experiments.展开更多
This paper examines the development process of online education,the advantages and disadvantages of online education from the perspective of teachers,proposes on how teachers should transform in order to adapt to onli...This paper examines the development process of online education,the advantages and disadvantages of online education from the perspective of teachers,proposes on how teachers should transform in order to adapt to online education from the perspective of classroom teaching,and finally gives thoughts on the future and application of online education.展开更多
针对库水位传统量测方法中水尺易锈蚀倾斜,精度低且成本高的问题,该文提出一种不依赖水尺,基于图像匹配的库水位变动识别方法。首先对监控相机拍摄的库坝上游面光学图像进行畸变消除和透视变换,消除相机误差。进一步选取包含水面的感兴...针对库水位传统量测方法中水尺易锈蚀倾斜,精度低且成本高的问题,该文提出一种不依赖水尺,基于图像匹配的库水位变动识别方法。首先对监控相机拍摄的库坝上游面光学图像进行畸变消除和透视变换,消除相机误差。进一步选取包含水面的感兴趣区域(region of interest,ROI)图像进行自适应二值化分割、形态学处理等前处理操作,将水面和库坝特征分离,突出水位线位置。最后,利用归一化互相关匹配算法(normalised cross correlation,NCC)对水位变动前后的两幅图像进行匹配计算,识别水位线变动距离。通过室内试验与现场测试验证上述方法实用性。结果表明:基于图像匹配的库水位动态识别方法可准确识别水位变动,相对误差约为5%,此算法鲁棒性较高。该研究可为库水位自动化、低成本监测提供一种新思路。展开更多
文摘This paper discusses the innovative ways of history teaching in depth from the unique perspective of art.By analyzing how artistic elements can effectively enrich teaching means and contents,it reveals the important value of art in history teaching for the improvement of students’comprehensive literacy and further explores the role of art in promoting the modern transformation of history education.At the same time,the article also focuses on the challenges faced in practice,such as the lack of artistic qualities among teachers,the difficulties in integrating art and history,and the differences in students’acceptance.To cope with these challenges,the article proposes specific implementation strategies,including the integration of diversified art resources,innovative teaching methods and approaches,and the construction of a scientific and reasonable evaluation mechanism,aiming to comprehensively optimize the effectiveness of history teaching and further stimulate students’potential for all-round development.
文摘By consideration of the characteristics of martensitic transformation and the derivation from the application of the group theory to martensitic transformation, it may be concluded that the shape memory effect (SME) can be attained in materials through a martensitic transformation and its reverse transformation. only when there forms single or nearly single variant of martensite, with an absence of the factors causing the generation of the resistance against SME. on this principle, various shape memory materials including nonferrous alloys. iron-based alloys and ceramics containjng zirconia are expected to be further developed. A criterion for thermoelastic martensitic transformation is presented, Factors which may act as the resistance against SME in various materials are briefly described
基金Supported by National Science Foundation(60675022)Key Laboratory of Nondestructive Test, Nanchang Institute of Aeronautical Technoloyg(ZD200629007)
文摘Existing methods for recognizing polygons can be improved. A new concept ＂homograph＂ and then a new method for recognizing polygons based on the principle of homograph are proposed. First, five topological characteristics and geometrical characteristics are introduced that are invariant to describe polygon under perspective transformation. Then, the new concept of homograph is defined in terms of five topological characteristics and geometrical characteristics. Based on this definition, a new algorithm is proposed for recognizing that two polygons are homograph. The topological structure is introduced to analyze homograph qualitatively and the algorithm is insensitive to noises; and the geometrical structure is introduced to analyze homograph quantitatively, thus the algorithms can show tiny differences between polygons. It can not only recognize the objects with different shapes but also distinguish between objects with same shape but with different sizes and scales. Comparing with other recognition algorithms, the algorithm presented showed apparent improvement. The effectiveness of the algorithm is demonstrated by experiments.
文摘This paper examines the development process of online education,the advantages and disadvantages of online education from the perspective of teachers,proposes on how teachers should transform in order to adapt to online education from the perspective of classroom teaching,and finally gives thoughts on the future and application of online education.
文摘针对库水位传统量测方法中水尺易锈蚀倾斜,精度低且成本高的问题,该文提出一种不依赖水尺,基于图像匹配的库水位变动识别方法。首先对监控相机拍摄的库坝上游面光学图像进行畸变消除和透视变换,消除相机误差。进一步选取包含水面的感兴趣区域(region of interest,ROI)图像进行自适应二值化分割、形态学处理等前处理操作,将水面和库坝特征分离,突出水位线位置。最后,利用归一化互相关匹配算法(normalised cross correlation,NCC)对水位变动前后的两幅图像进行匹配计算,识别水位线变动距离。通过室内试验与现场测试验证上述方法实用性。结果表明:基于图像匹配的库水位动态识别方法可准确识别水位变动,相对误差约为5%,此算法鲁棒性较高。该研究可为库水位自动化、低成本监测提供一种新思路。
