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228 results on '"Chen, Jin-Quan"'

51. Radiant heat transfer in packed beds

Author

University of Michigan, Ann Arbor, Michigan, Chen, Jin-Quan, Churchill, Stuart Winston, University of Michigan, Ann Arbor, Michigan, Chen, Jin-Quan, and Churchill, Stuart Winston

Abstract

The effective scattering and absorption cross sections were determined from measurements of radiant transmission through isothermal beds of glass, aluminum oxide, steel and silicon carbide spheres, cylinders, and irregular grains. The radiant conductivities were calculated from these cross sections. Back scattering was found to be the principal mechanism of attenuation for all of the packings. Absorption was a significant mechanism only for the silicon carbide grains. At 2,000°F. The radiant contribution to the total heat flux was estimated to vary from 35% for the silicon carbide packings to 85% for the glass packings.

Published
2006

52. Bacterial and archaeal diversities in Yunnan and Tibetan hot springs, China

Author

Song, Zhao‐Qi, primary, Wang, Feng‐Ping, additional, Zhi, Xiao‐Yang, additional, Chen, Jin‐Quan, additional, Zhou, En‐Min, additional, Liang, Feng, additional, Xiao, Xiang, additional, Tang, Shu‐Kun, additional, Jiang, Hong‐Chen, additional, Zhang, Chuanlun L., additional, Dong, Hailiang, additional, and Li, Wen‐Jun, additional

Published
2012
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55. Fracture analysis of steam turbine blade.

Author

WANG Kuan-hua, PAN Zhi-xian, ZHENG Fei-yi, LAI Hui-jian, and CHEN Jin-quan

Abstract

Aiming at the common problem with the water treatment for boiler, turbine scaling itself was analyzed. The thermal calculation result of blade was checked, and the intension calculation on the 5th stage blade at normal condition and choked condition was reviewed. After the broken turbine blade for one garbage plant was analyzed in detail, it was found that the extra force on blade was caused by the flow path reduced that is from the scaling and the extra force cause the blade broken finally. The study results show that, the turbine-generator set could be run stablity with the follow improvement : optimization on the water treatment performance and attention on the steam quality change if any with continue checking on steam turbine operation data. [ABSTRACT FROM AUTHOR]

Published
2014
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85. Nuclear stretching

Author

Pin, Jia-Lun, primary, Chen, Jin-Quan, additional, Wu, Cheng-Li, additional, and Feng, Da Hsuan, additional

Published
1991
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97. Tables of one-body CFP for group chains U(mn) ⊃ U(m) × U(n) and

Author

Gao Mei-Juan, Da Hsuan Feng, Michel Vallieres, Shi Yi-Jin, and Chen Jin-Quan

Subjects
Combinatorics, Physics, Nuclear and High Energy Physics, Chain (algebraic topology), Group (mathematics), Isoscalar, Unitary group, Eigenfunction, Permutation group
Abstract

Tables of the one-body coefficients of fractional parentage are presented for the unitary group chain U( mn ) ⊃ U( m ) × U( n ) and the graded unitary group chain U (mp + nq mq + np) ⊃ U ( m n ) × U ( p q ) with arbitrary m , n , p and q for systems having up to six particles. These coefficients are computed by using a program based on the fact that they are the isoscalar factors for the permutation group chain S( f ) ⊃ S( f − 1), and thus are m and n (or m , n , p and q ) independent. The S( f ) ⊃ S( f − 1) isoscalar factors are calculated by the eigenfunction method. Incidently, the program also provides an efficient way for constructing the Clebsch-Gordan coefficients of the permutation group.

Published
1984

98. Eigenfunction Method for Space Group Clebsch-Gordan Coefficients

Author

Chen Jin-Quan, Gao Mei-Juan, and Ma Guang-qun

Subjects
Reduction (complexity), Physics and Astronomy (miscellaneous), Group (mathematics), Mathematics::Quantum Algebra, Mathematical analysis, Mathematics::Mathematical Physics, Clebsch–Gordan coefficients, Eigenfunction, Space (mathematics), Mathematics
Abstract

An easily programmable algorithm is established for obtaining the reduction coefficients and Clebsch-Gordan coefficients of a space group simultaneously based on the eigen-function method.

Published
1983

99. Symmetry and application of SU(mn)⊃SU(m)×SU(n) coefficients of fractional parentage

Author

Da Hsuan Feng, Michel Vallieres, Chen Jin-Quan, and Shi Yi-Jin

Subjects
Physics, Nuclear and High Energy Physics, Quantum mechanics, Isoscalar, Quark model, Homogeneous space, Permutation group, Symmetry (physics), Mathematical physics
Abstract

A method is given for calculating the SU( mn )⊃SU( m )×SU( n ) many-particle coefficients of fractional parentage (CFP) in terms of the single-particle CFP without using the SU( m ) and SU( n ) Racah coefficients. Some remarkable symmetries of the SU( mn ) ⊃ SU( m ) × SU( n ) CFP are obtained on the grounds that they are at the same time the isoscalar factor for the permutation group chain S( f 1 + f 2 )⊃S( f 1 )⊗S( f 2 ). The application of the SU( mn )⊃SU( m )×SU( n ) CFP to the quark model of nuclei is illustrated. It is shown that the transformation coefficients between the symmetry basis and the physical basis of two nuclear clusters are simply products of two SU( mn )⊃ SU( m )×SU( n ) CFP.

Published
1983

100. Algebraic solutions for point groups: Cubic groups <TOGGLE>G</TOGGLE> in the group chain <TOGGLE>G</TOGGLE>⊃<TOGGLE>T</TOGGLE>⊃<TOGGLE>D</TOGGLE><INF>2</INF>⊃<TOGGLE>C</TOGGLE><INF>2</INF>

Author

Chen, Jin-Quan, Fan, Peng-Dong, and Paldus, Josef

Abstract

Concise algebraic expressions of the symmetry-adapted functions (SAFs) for both single-valued and double-valued representations are derived for the group chain O⊃T⊃D2⊃C2 and O⊃D4⊃D2⊃C2, which are functions of only the quantum numbers of the respective group chain without involving any irreducible matrix elements. It is shown that the SAFs of the cubic groups G=O,Td,Th,Oh can be expressed in a simple way in terms of the SAFs of the group T. © 2000 John Wiley & Sons, Inc. Int J Quant Chem 76: 585–599, 2000

Published
2000
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