By using the method of quasi-shells , the nonlinear dynamic equations of three-dimensional single-layer shallow cylindrical reticulated shells with equilateral triangle cell are founded. By using the method of the sep...By using the method of quasi-shells , the nonlinear dynamic equations of three-dimensional single-layer shallow cylindrical reticulated shells with equilateral triangle cell are founded. By using the method of the separating variable function, the transverse displacement of the shallow cylindrical reticulated shells is given under the conditions of two edges simple support. The tensile force is solved out from the compatible equations, a nonlinear dynamic differential equation containing second and third order is derived by using the method of Galerkin. The stability near the equilibrium point is discussed by solving the Floquet exponent and the critical condition is obtained by using Melnikov function. The existence of the chaotic motion of the single-layer shallow cylindrical reticulated shell is approved by using the digital simulation method and Poincare mapping.展开更多
Ecological garden views were adopted to re-explore benefits of garden landscaping, co-prosperity of man and tree was applied to study application modes of plants in ecological gardens. Green spaces in ecological garde...Ecological garden views were adopted to re-explore benefits of garden landscaping, co-prosperity of man and tree was applied to study application modes of plants in ecological gardens. Green spaces in ecological gardens should be evenly and reasonably distributed, actual conditions of the planning site respected, outstanding styles and diversified plant furnishings defined. Three layouts of ecological gardens and the future development trend of modern ecological gardens were introduced.展开更多
Located in the east of Gansu Province, Gangu County in Tianshui City is the only way that people went to the Central Plains from the western regions in ancient times, and it's also an important node of the Grotto ...Located in the east of Gansu Province, Gangu County in Tianshui City is the only way that people went to the Central Plains from the western regions in ancient times, and it's also an important node of the Grotto Culture Corridor of the Silk Road. Daxiang Mountain Giant Buddha Grottoes is the landmark of Gangu County. The giant Buddha statue stands among cliffs 200 meters high above the ground, and it is the second largest stone-base clay-sculpture Buddha in China. After going through thousands of years, the Giant Buddha Grottoes needs effective and scientific protection. This article was originated from the actual project—The Research on the Construction Technology of Wooden-structure Grotto Eaves in the Daxiang Mountain. This article f inished the rebuilding plan for the Buddha Grotto Eaves on the basis of analyzing historical documents, hole traces, morphological evolution and image demonstration.展开更多
This paper first analyzes the development status of mobile phone advertisement in China,and then introduces the features and advantages of mobile phone advertisement,and finally it analyzes the development trend of mo...This paper first analyzes the development status of mobile phone advertisement in China,and then introduces the features and advantages of mobile phone advertisement,and finally it analyzes the development trend of mobile phone advertisement in new era.展开更多
基金Project supported by the Natural Science Foundation of Gansu Province of China(No.3Zs042-B25-006)
文摘By using the method of quasi-shells , the nonlinear dynamic equations of three-dimensional single-layer shallow cylindrical reticulated shells with equilateral triangle cell are founded. By using the method of the separating variable function, the transverse displacement of the shallow cylindrical reticulated shells is given under the conditions of two edges simple support. The tensile force is solved out from the compatible equations, a nonlinear dynamic differential equation containing second and third order is derived by using the method of Galerkin. The stability near the equilibrium point is discussed by solving the Floquet exponent and the critical condition is obtained by using Melnikov function. The existence of the chaotic motion of the single-layer shallow cylindrical reticulated shell is approved by using the digital simulation method and Poincare mapping.
文摘Ecological garden views were adopted to re-explore benefits of garden landscaping, co-prosperity of man and tree was applied to study application modes of plants in ecological gardens. Green spaces in ecological gardens should be evenly and reasonably distributed, actual conditions of the planning site respected, outstanding styles and diversified plant furnishings defined. Three layouts of ecological gardens and the future development trend of modern ecological gardens were introduced.
基金Sponsored by Program of Housing and Urban-rural Construction Department of Gansu Province(JK2014-22)
文摘Located in the east of Gansu Province, Gangu County in Tianshui City is the only way that people went to the Central Plains from the western regions in ancient times, and it's also an important node of the Grotto Culture Corridor of the Silk Road. Daxiang Mountain Giant Buddha Grottoes is the landmark of Gangu County. The giant Buddha statue stands among cliffs 200 meters high above the ground, and it is the second largest stone-base clay-sculpture Buddha in China. After going through thousands of years, the Giant Buddha Grottoes needs effective and scientific protection. This article was originated from the actual project—The Research on the Construction Technology of Wooden-structure Grotto Eaves in the Daxiang Mountain. This article f inished the rebuilding plan for the Buddha Grotto Eaves on the basis of analyzing historical documents, hole traces, morphological evolution and image demonstration.
文摘This paper first analyzes the development status of mobile phone advertisement in China,and then introduces the features and advantages of mobile phone advertisement,and finally it analyzes the development trend of mobile phone advertisement in new era.
