The exact eigenstates of the Hamiltonian of a continuum model for heavy-electron metal are constructed by using the Bethe ansatz. The Bethe ansatz equations are obtained from the periodic boundary conditions. The resu...The exact eigenstates of the Hamiltonian of a continuum model for heavy-electron metal are constructed by using the Bethe ansatz. The Bethe ansatz equations are obtained from the periodic boundary conditions. The results show that this system is also completely integrable.展开更多
Employing the coherent state ansatz and the time-dependent variational principle, we obtain a partial differential equation of motion from Hamiltonian in inharmonic molecular crystals. By using the method of multiple ...Employing the coherent state ansatz and the time-dependent variational principle, we obtain a partial differential equation of motion from Hamiltonian in inharmonic molecular crystals. By using the method of multiple scales, we reduce this equation into the envelope function and find that the amplitude function satisfied a nonlinear Schrodinger equation. Introducing the inverse scattering transformation, we gain the single-, two- and N- soliton solutions. The energy and the spatial configurations of the system are given. We also acquire the periodic wave solution and analyze its stability.展开更多
Abstract: Ultrafine SnOx thin films were prepared from tetrabtltyltin by RF glow dis charge polymerization. Annealing behaviour of films under air and gas-sensitive probesty were investigated. The ultrafine SnOx thin ...Abstract: Ultrafine SnOx thin films were prepared from tetrabtltyltin by RF glow dis charge polymerization. Annealing behaviour of films under air and gas-sensitive probesty were investigated. The ultrafine SnOx thin film with average part ide size of 6nm exhibited a high sensitivity of 30 to 500ppm EtOH at 200℃.展开更多
There are striking similiarities present between the behavior of invasive placentaL cells and that of invasive cancer cells. Matrix metalloproteinases (MMPs) are one of the most important mediators. MMP-28, the new me...There are striking similiarities present between the behavior of invasive placentaL cells and that of invasive cancer cells. Matrix metalloproteinases (MMPs) are one of the most important mediators. MMP-28, the new member of MMPs, was sequenced and identified recently. Expression of MMP-28 mRNA and protein in the cytotrophoblast cells and a choriocarcinoma cell line, JEG-3 cell, was conducted by zymography, RT-PCR and Northern blot. There is MMP-28 mRNA expression in both the cytotrophoblast cells and JEG-3 cells by RT-PCR. The activity of MMP-28 in cytotrophoblast cells was significantly weaker than that in JEG-3 (P 【 0.01) by zymography. Furthermore, mRNA expression of MMP-28 was significantly stronger (P 【 0.001) in JEG-3 than in human cytotrophoblast cells in a time-dependent way by Northern Blot. Our results suggest that MMP-28 may play a role in some of the tissue-remodeling events associated with normal pregnancy and tumor progression.展开更多
文摘The exact eigenstates of the Hamiltonian of a continuum model for heavy-electron metal are constructed by using the Bethe ansatz. The Bethe ansatz equations are obtained from the periodic boundary conditions. The results show that this system is also completely integrable.
文摘Employing the coherent state ansatz and the time-dependent variational principle, we obtain a partial differential equation of motion from Hamiltonian in inharmonic molecular crystals. By using the method of multiple scales, we reduce this equation into the envelope function and find that the amplitude function satisfied a nonlinear Schrodinger equation. Introducing the inverse scattering transformation, we gain the single-, two- and N- soliton solutions. The energy and the spatial configurations of the system are given. We also acquire the periodic wave solution and analyze its stability.
文摘Abstract: Ultrafine SnOx thin films were prepared from tetrabtltyltin by RF glow dis charge polymerization. Annealing behaviour of films under air and gas-sensitive probesty were investigated. The ultrafine SnOx thin film with average part ide size of 6nm exhibited a high sensitivity of 30 to 500ppm EtOH at 200℃.
基金This work was supported by the Special Funds for the Major State Basic Research Project (Grant No. G1999055903)the Climbing Project of China (Grant No. 970211019-3)the Hundred-Scientist-Program of the Chinese Academy of Sciences.
文摘There are striking similiarities present between the behavior of invasive placentaL cells and that of invasive cancer cells. Matrix metalloproteinases (MMPs) are one of the most important mediators. MMP-28, the new member of MMPs, was sequenced and identified recently. Expression of MMP-28 mRNA and protein in the cytotrophoblast cells and a choriocarcinoma cell line, JEG-3 cell, was conducted by zymography, RT-PCR and Northern blot. There is MMP-28 mRNA expression in both the cytotrophoblast cells and JEG-3 cells by RT-PCR. The activity of MMP-28 in cytotrophoblast cells was significantly weaker than that in JEG-3 (P 【 0.01) by zymography. Furthermore, mRNA expression of MMP-28 was significantly stronger (P 【 0.001) in JEG-3 than in human cytotrophoblast cells in a time-dependent way by Northern Blot. Our results suggest that MMP-28 may play a role in some of the tissue-remodeling events associated with normal pregnancy and tumor progression.
