17,842 Result(s)

Article

The lie algebra of invariant group of the KdV, MKdV, or Burgers equation

Let (E): u _t=H(u) denote the KdV, MKdV or Burgers equation, and U(s)=Σ(D^j _s)∂/∂u _j, where D=d/dx, u _i=Dⁱ _u, s=s(u, u ₁, ..., u _n) is a polynomial of u _i with constant coefficients, be the generator of invariant g...

Tu Gue-Zhang in Letters in Mathematical Physics (1979)

Article

A commutativity theorem of partial differential operators

Letu=u(x, t) be a function ofx andt, andu _i =D ⁱ u,D=d/dx,i=0, 1, 2, ..., be its derivatives with respect tox. Denote byW

Gui-zhang Tu in Communications in Mathematical Physics (1980)

Article

Semi-microscopic optical potential calculation by the nuclear matter approach

In this paper the semi-microscopic nuclear matter approach has been introduced to calculate the microscopic optical potential. The first- and second-order mass operators in asymmetric nuclear matter have been ...

Shen Qingbiao, Zhang **gshang, Tian Ye… in Zeitschrift für Physik A Atoms and Nuclei (1981)

Article

Second-rank tensors inSU _n gauge theory

H. Mitter, Yi-Cheng Zhang in Lettere al Nuovo Cimento (1971-1985) (1981)

Article

Sn In silicon carbide: A mossbauer and channeling study

Implantation of Sn at ∼550°C into SiC and post-annealing at 1120°C has been demonstrated to lead to a predominant population of the substitutional Si sites. The electronic structure of the Sn atoms in substitu...

J. W. Petersen, J. U. Andersen, S. Damgaard, F. O. Lu… in Hyperfine Interactions (1981)

Article

Laser emission of 2,2″-dimethylparaterphenyl at 77 K

Dye laser emission of 2,2″-dimethylparaterphenyl at 77 K down to 208.5 nm is reported.

F-G Zhang, F. P. Schäfer in Applied Physics B (1981)

Article

Energy carried by gamma rays and neutral particles in multihadron final states at petra

The fraction of the total available energy carried by photons and the fraction carried by neutral particles of all types ine ⁺ e ⁻ multihadron final states have been measured at three centre-of-mass energies betw...

W. Bartel, D. Cords, P. Dittmann, R. Eichler… in Zeitschrift für Physik C Particles and Fie… (1981)

Article

Entropy of self-gravitating radiation

We examine the entropy of self-gravitating radiation confined to a spherical box of radiusR in the context of general relativity. We expect that configurations (i.e., initial data) which extremize total entropy w...

Rafael D. Sorkin, Robert M. Wald, Zhang Zhen Jiu in General Relativity and Gravitation (1981)

Article

On the permutability of Bäcklund transformations: 1 infinitesimal Bäcklund transformations of the sine-Gordon equation

Letu′=B _a u be the Bäcklund transformation of the sine-Gordon equation, we prove that $$B_{a + \va...

Tu Gui-Zhang in Letters in Mathematical Physics (1982)

Article

Angular distribution calculation based on the exciton model taking account of the influence of the Fermi motion and the Pauli principle

An exact closed form solution to the time-integrated master equation of the exciton model is applied to the calculation of the angular distribution for both the preequilibrium and equilibrium decays of the neu...

Sun Ziyang, Wang Shunuan, Zhang **gshang… in Zeitschrift für Physik A Atoms and Nuclei (1982)

Article

Graded de Sitter space-time, group and algebra

The (m+n)-dimensional flat superspace is considered and graded linear groups with their graded algebra are calculated. The (4+4)-dimensional graded de Sitter space-time is discussed geometrically by its embedding...

Zhang Li-ning in Il Nuovo Cimento A (1965-1970) (1982)

Article

Electroweak interference effects in the high energye ⁺+e ⁻→e ⁺+e ⁻+hadrons process

We examine interference effects of the electrowcak interaction in the high energye ⁺+e ⁻→e ⁺ +e ⁻+hadrons process. The effect provides a further test of the G-W-S model [1] and may lead to a better understanding ...

H. C. Lee, Li Bing-An, Shen Qi-**ng… in Zeitschrift für Physik C Particles and Fie… (1982)

Article

On infinitesimal bäcklund transformations and generalized symmetries of the nonlinear σ-model

The nonlinear σ-model is shown to possess and infinite number of generalized symmetries and a relationship between symmetries and conservation laws of the model is established.

Tu Gui-Zhang in Il Nuovo Cimento B (1971-1996) (1982)

Article

Intramolecular TT-energy transfer in bifluorophoric laser dyes

Rates of intramolecular triplet-triplet energy transfer have been measured for three new bifluorophoric laser dyes. Strong dependence of these rates on the length of the link between the two fluorophores was o...

F. P. Schäfer, F. -G. Zhang, J. Jethwa in Applied Physics B (1982)

Article

Nonlinear optical processes I

A. Ashkin, P. W. Smith, J. M. Dziedzic, W. J. Siekhaus… in Applied Physics B (1982)

Article

Laser plasmas

W. Seka, L. M. Goldman, J. M. Soures, R. S. Craxton, T. Boehly… in Applied Physics B (1982)

Article

Laser spectroscopy

P. R. Berman, J. F. Lam, D. G. Steel, R. A. McFarlane, R. Scholz… in Applied Physics B (1982)

Article

Hierarchy of chaotic bands

Results of a detailed numerical study on the structure of chaotic bands in a forced limit cycle oscillator (the Brusselator) are presented. Embedded in the chaotic bands of primary bifurcation sequence there a...

Bai-lin Hao, Shu-yu Zhang in Journal of Statistical Physics (1982)

Article

The influence of a net charge on the critical mass of a neutron star

We derived the set of equations determining the structure of a spherically symmetric charged star within the framework of general relativity (modified Oppenhiemer-Volkoff equations). The equations have been so...

J. L. Zhang, W. Y. Chau, T. Y. Deng in Astrophysics and Space Science (1982)

Article

Bäcklund transformations for the jaulent-miodek equations

The common x-part of Bäcklund transformations for the Jaulent-Miodek Equations is derived via gauge transformations. The general forms of the t-part of Bäcklund transformations for the higher-order KdV equations ...

C. Laddomada, Tu Gui-Zhang in Letters in Mathematical Physics (1982)