Levitation and Oscillation of Dust Grains in Plasma Sheath with Wake Potential

We investigate the equilibrium and levitation of dust grains in a plasma sheath with various forces,in particular the wake potential force.The vertical oscillation frequency of dust chains is also obtained by including the wake potential term.It is found that the wake potential has a significant role for the levitation and oscillation of dust grains.     

Charge—Orbital Ordering in Ferromagentic and Charge—Exchange—Type Antiferromagentic Phases for Half—Doped Manganites

Using a two-orbital DE model including the Coulomb interaction,we show that the charge-orbital ordering usually found in the charge-exchange phase may exist in the ferromagnetic phase for half-doped manganits,Thus,two types of phase transitions observed experimentally can be explained by the obtained phase diagram.     

Asphericity in the Fermi Surface and Fermi Energy of Na－K,Na－Rb and Na－Cs Binary Alloys

Detailed theoretical investigations into asphericity in the Fermi surface(FS) and Fermi energy(FE) of Na1-xKx,Na1-xRbx,and Na1-xCsx binary solid solutions are carried out for the first time,The allying behavior of the K,Rb,and Cs with the Na generates the Fermi surface distortion(FSD) of bcc simple metals,The FS of Na-K,Na-Rb,and Na-Cs solid solution is a distorted sphere with the largest deviation along[110],We have found that the impact of local-field correction function on FSD is maximum at [100] point and minimum at [111] point.The exchange and correlation effect is found to suppress the value of FE.     

树脂催化法合成糖醇酯的研究

利用大孔阳离子交换树脂为催化剂，催化合成乙酸糖醇酯，丙酸糠醇酯，丁酸糠醇酯，乙酸四氢糠醇酯，丙酸四氢糠醇酯，丁酸四氢糠醇酯，对影响反应的诸因素进行了讨论。     

加强基础性研究，推进人才、项目、基地一体化建设

本文论述了加强基础研究，推进人才、项目、基地一体化建设的四项原则。     

LA群新系列（I）

This paper shows thawt prime power groups which are cyclic extensions of elementary abelian groups are all LA-groups.