With the development of sound and light technology, they are increasingly being applied to art exhibitions and creations, and even become an indispensable part of the work of art. Installation art prints are more orna...With the development of sound and light technology, they are increasingly being applied to art exhibitions and creations, and even become an indispensable part of the work of art. Installation art prints are more ornamental interesting, appealing and shocking when being promoted by sound and light technology, but also providing more ideas and methods for creators. The creators but also should pay attention to rational use of sound and light technology to achieve better performance results.展开更多
Aerobics includes gymnastics, music, dance and aesthetics, using specialized equipment by hand and holding light equipment to achieve fitness and operation of exercises, it is a bodybuilding methods centering for the ...Aerobics includes gymnastics, music, dance and aesthetics, using specialized equipment by hand and holding light equipment to achieve fitness and operation of exercises, it is a bodybuilding methods centering for the purpose of emerging entertainment and ornamental sports, and it is also a strong public artistic gymnastics. It is with superb skill, charming and colorful parade of action, posture which is coordinated with the music to demonstrate the extraordinary artistic charm, thus attracting more and more students to participate in. Because it is different from traditional hand gymnastic exercises, and does not have too high demands for space and equipment. Practicing it just needs fast-paced and lively musical accompaniment, and dynamic movements can make people feel good, so it wins the majority of young people, especially girls. Calisthenics is as one of the means to work out for students; in particular, it develops a lifelong habit of physical exercise and plays an important role for college girls＇ lifelong fitness awareness. The topic is studying female college students on aerobics body shape, function, quality and impact of mental health to promote the development of physical education reform.展开更多
Microstructure and forming quality of friction stir welding joints of 7075A1 and AZ31BMg with different welding parameters were analyzed. The results show that, good welded joint is obtained when the rotating frequenc...Microstructure and forming quality of friction stir welding joints of 7075A1 and AZ31BMg with different welding parameters were analyzed. The results show that, good welded joint is obtained when the rotating frequency is 13 r/s and the welding speed is 30 mm/min. An irregular area is formed in the welding center. Meanwhile, the river pattern and eddy-like distribution are found in the weld nugget zone. Besides, brittle inter- metallic compounds Al12Mg17 and A13Mg2 are found in the welded joint. They cause the increase of microhardness of welded joint. The maximum tension stress of welded joint is 112 MPa.展开更多
To classify the quality of the resistance spot welding process, a relationship between the welder electrode displacement curve characteristics and the weld shear force has been explored. Eleven statistical features of...To classify the quality of the resistance spot welding process, a relationship between the welder electrode displacement curve characteristics and the weld shear force has been explored. Eleven statistical features of the displacement signMs are extracted to represent the welding quality. Self-organizing map （SOM） neural networks have been employed to discover their quantitative relationship. In order to identify the influence of various displacement curve features, all of the available combinations have been used as inputs for SOM neural networks. Further we analyze the impact of each feature on the classification results, yielding the best quality-indicative combination of characteristics. There is no determinant relationship between the welding quality and the level of expulsion rate. The quality of welding is most impacted by the maximum electrode displacement, the span of welding process and the centroid of the electrode displacement curve. The experiments show that SOM is feasible to assess the welding quality and can render the visualized intuitive evaluation results.展开更多
文摘With the development of sound and light technology, they are increasingly being applied to art exhibitions and creations, and even become an indispensable part of the work of art. Installation art prints are more ornamental interesting, appealing and shocking when being promoted by sound and light technology, but also providing more ideas and methods for creators. The creators but also should pay attention to rational use of sound and light technology to achieve better performance results.
文摘Aerobics includes gymnastics, music, dance and aesthetics, using specialized equipment by hand and holding light equipment to achieve fitness and operation of exercises, it is a bodybuilding methods centering for the purpose of emerging entertainment and ornamental sports, and it is also a strong public artistic gymnastics. It is with superb skill, charming and colorful parade of action, posture which is coordinated with the music to demonstrate the extraordinary artistic charm, thus attracting more and more students to participate in. Because it is different from traditional hand gymnastic exercises, and does not have too high demands for space and equipment. Practicing it just needs fast-paced and lively musical accompaniment, and dynamic movements can make people feel good, so it wins the majority of young people, especially girls. Calisthenics is as one of the means to work out for students; in particular, it develops a lifelong habit of physical exercise and plays an important role for college girls＇ lifelong fitness awareness. The topic is studying female college students on aerobics body shape, function, quality and impact of mental health to promote the development of physical education reform.
基金the Fundamental Research Funds for the Central Universities of China(No.SWJTU-11BR052)
文摘Microstructure and forming quality of friction stir welding joints of 7075A1 and AZ31BMg with different welding parameters were analyzed. The results show that, good welded joint is obtained when the rotating frequency is 13 r/s and the welding speed is 30 mm/min. An irregular area is formed in the welding center. Meanwhile, the river pattern and eddy-like distribution are found in the weld nugget zone. Besides, brittle inter- metallic compounds Al12Mg17 and A13Mg2 are found in the welded joint. They cause the increase of microhardness of welded joint. The maximum tension stress of welded joint is 112 MPa.
基金the National Natural Science Foundation of China(No.61175038)the Innovation Program of Shanghai Committee of Science and Technology (No.11JC1405800)
文摘To classify the quality of the resistance spot welding process, a relationship between the welder electrode displacement curve characteristics and the weld shear force has been explored. Eleven statistical features of the displacement signMs are extracted to represent the welding quality. Self-organizing map （SOM） neural networks have been employed to discover their quantitative relationship. In order to identify the influence of various displacement curve features, all of the available combinations have been used as inputs for SOM neural networks. Further we analyze the impact of each feature on the classification results, yielding the best quality-indicative combination of characteristics. There is no determinant relationship between the welding quality and the level of expulsion rate. The quality of welding is most impacted by the maximum electrode displacement, the span of welding process and the centroid of the electrode displacement curve. The experiments show that SOM is feasible to assess the welding quality and can render the visualized intuitive evaluation results.
