In Maizhokunggar County of Lhasa City,the Xizang Autonomous Region,a precious intangible cultural heritage is preserved-the traditional craft of Zaxoi drum making,which carries profound historical and cultural signifi...In Maizhokunggar County of Lhasa City,the Xizang Autonomous Region,a precious intangible cultural heritage is preserved-the traditional craft of Zaxoi drum making,which carries profound historical and cultural significance.After hundreds of years,its unique value continues to shine through the passage of time.For more than 40 years,Kongcho Dondrup,an inheritor of this craftsmanship,has poured his heart into preserving and promoting this ancient art.展开更多
The elephant-foot drum is one of the most representative musical instrument of the Dai ethnic group.The drum-making skill was listed as a national intangible cultural heritage in 2011.The elephant-foot drum dance is v...The elephant-foot drum is one of the most representative musical instrument of the Dai ethnic group.The drum-making skill was listed as a national intangible cultural heritage in 2011.The elephant-foot drum dance is very popular among the Dai people.It can be danced by one or two people or a group of people.It is often performed during festivals.This form of dance was at first used to scare off evil(邪恶)and welcome the new year.展开更多
Taking simultaneous variations in both particle volume and density into account, the radial mixing and segregation of binary granular bed in a rotating drum half loaded were investigated by a 3D discrete element metho...Taking simultaneous variations in both particle volume and density into account, the radial mixing and segregation of binary granular bed in a rotating drum half loaded were investigated by a 3D discrete element method. Then, based on the competition theory of condensation and percolation, radial segregation due to differences in particle volume and/or density was analyzed. The results show that if either percolation effect induced by volume difference or condensation effect induced by density difference dominates in the active layer of moving bed, separation will occur. Controlling the volume ratio or density ratio of the two types of particles can achieve an equilibrium state between percolation and condensation, and then homogenous mixture can be obtained. When the percolation balances with the condensation, the relationship between volume ratioand density ratiopresents nearly a power function. Scaling up a rotating drum will not affect the mixing degree of the granular bed so long as the volume ratio and density ratio are predefined.展开更多
文摘In Maizhokunggar County of Lhasa City,the Xizang Autonomous Region,a precious intangible cultural heritage is preserved-the traditional craft of Zaxoi drum making,which carries profound historical and cultural significance.After hundreds of years,its unique value continues to shine through the passage of time.For more than 40 years,Kongcho Dondrup,an inheritor of this craftsmanship,has poured his heart into preserving and promoting this ancient art.
文摘The elephant-foot drum is one of the most representative musical instrument of the Dai ethnic group.The drum-making skill was listed as a national intangible cultural heritage in 2011.The elephant-foot drum dance is very popular among the Dai people.It can be danced by one or two people or a group of people.It is often performed during festivals.This form of dance was at first used to scare off evil(邪恶)and welcome the new year.
基金Projects(5137424151275531)supported by the National Natural Science Foundation of ChinaProject(CX2014B059)supported by the Innovation Foundation for Postgraduate of Hunan Province,China
文摘Taking simultaneous variations in both particle volume and density into account, the radial mixing and segregation of binary granular bed in a rotating drum half loaded were investigated by a 3D discrete element method. Then, based on the competition theory of condensation and percolation, radial segregation due to differences in particle volume and/or density was analyzed. The results show that if either percolation effect induced by volume difference or condensation effect induced by density difference dominates in the active layer of moving bed, separation will occur. Controlling the volume ratio or density ratio of the two types of particles can achieve an equilibrium state between percolation and condensation, and then homogenous mixture can be obtained. When the percolation balances with the condensation, the relationship between volume ratioand density ratiopresents nearly a power function. Scaling up a rotating drum will not affect the mixing degree of the granular bed so long as the volume ratio and density ratio are predefined.
