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  1. No Access

    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(Dj 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)

  2. No Access

    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)

  3. No Access

    Chapter and Conference Paper

    A Two-Photon Laser

    During the past decade, electronic two-photon transitions [1] have been observed and largely utilized in two-photon absorption of laser light by atoms and molecules. In particular, cancellation of the Doppler ...

    B. Nikolaus, D. Z. Zhang, P. E. Toschek in Laser Spectroscopy V (1981)

  4. No Access

    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)

  5. No Access

    Article

    Second-rank tensors inSU n gauge theory

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

  6. No Access

    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)

  7. No Access

    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)

  8. No Access

    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)

  9. No Access

    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)

  10. No Access

    Chapter

    Scanning Photoacoustic Microscopy and Detection of Subsurface Structure

    A scanning photoacoustic microscopy with a surface imaging resolution of about 2µm has been established. Some images of the subsurface structure of metals and layered materials have been obtained by measuring ...

    Zhang Shu-yi, Yu Chao, Miao Yong-zhi, Tang Zheng-yan, Gao Dun-tang in Acoustical Imaging (1982)

  11. No Access

    Chapter

    Array Systems for Underwater Viewing by Acoustical Holography

    Experiments on underwater viewing by acoustical holography at Wuhan Institute of Physics, Wuhan, China are described. Early experiments were conducted in an anechoic water tank with scanning linear arrays. The...

    J. P. N. Wei, D. J. Zhang, Z. Q. Sun, Z. Q. Zhou in Acoustical Imaging (1982)

  12. No Access

    Chapter and Conference Paper

    A Theoretical Model of the Coherent Structure of the Turbulent Boundary Layer in Zero Pressure Gradient

    A self-generating deterministic coherent structure is shown to arise in calculations on a model of a turbulent boundary layer. The solution commences with the evaluation of the linear damped periodic eigen mod...

    Z. Zhang, G. M. Lilley in Turbulent Shear Flows 3 (1982)

  13. No Access

    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)

  14. No Access

    Chapter

    The Microscopic Mechanism of the (p, π+) Reaction

    The microscopic description of the π nucleus scattering is generalized to study the (p, π) reactions. The differential cross section of the 3He(p, π+)4He at T1ab p = 415 Mev is calculated by this me...

    Liu Bo, Zhang Zong-Ye in Contemporary Research Topics in Nuclear Physics (1982)

  15. No Access

    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)

  16. No Access

    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)

  17. No Access

    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)

  18. No Access

    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)

  19. No Access

    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)

  20. No Access

    Article

    Nonlinear optical processes I

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

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