A two phase free boundary problem for coupled system including three elliptic equations is considered.The problem comes from the discussion of a growth model of self maintaining protocell in multidimensional case.Th...A two phase free boundary problem for coupled system including three elliptic equations is considered.The problem comes from the discussion of a growth model of self maintaining protocell in multidimensional case.The global classical solution of the problem with free boundary Γ∶y=g(x,t) between two domains is under search.The global existence and uniqueness of a quasi-stationary problem are proved in multidimensional case.展开更多
A single-particle microbeam facility has been constructed at the Key Laboratory of Ion Beam Bioengi- neering (LIBB), Chinese Academy of Sciences (CAS). The system was designed to deliver a defined numbers of hydro- ge...A single-particle microbeam facility has been constructed at the Key Laboratory of Ion Beam Bioengi- neering (LIBB), Chinese Academy of Sciences (CAS). The system was designed to deliver a defined numbers of hydro- gen ions, produced by a van de Graaff accelerator, in an en- ergy range of 2.0—3.0 MeV, into an area smaller than that of the nucleus of an individual living cell. The beam is colli- mated by a borosilicate glass capillary that forms the beam-line exit. An integrated computer program recognizes the cells and locates them one by one over the microbeam exit for irradiation. We present technical details of the CAS-LIBB microbeam facility, particularly on the collimator, hardware, control program, as well as cell irradiation proto- cols available. Various factors contributing to the targeting and positioning precision are discussed along with accuracy measurement results.展开更多
文摘A two phase free boundary problem for coupled system including three elliptic equations is considered.The problem comes from the discussion of a growth model of self maintaining protocell in multidimensional case.The global classical solution of the problem with free boundary Γ∶y=g(x,t) between two domains is under search.The global existence and uniqueness of a quasi-stationary problem are proved in multidimensional case.
文摘A single-particle microbeam facility has been constructed at the Key Laboratory of Ion Beam Bioengi- neering (LIBB), Chinese Academy of Sciences (CAS). The system was designed to deliver a defined numbers of hydro- gen ions, produced by a van de Graaff accelerator, in an en- ergy range of 2.0—3.0 MeV, into an area smaller than that of the nucleus of an individual living cell. The beam is colli- mated by a borosilicate glass capillary that forms the beam-line exit. An integrated computer program recognizes the cells and locates them one by one over the microbeam exit for irradiation. We present technical details of the CAS-LIBB microbeam facility, particularly on the collimator, hardware, control program, as well as cell irradiation proto- cols available. Various factors contributing to the targeting and positioning precision are discussed along with accuracy measurement results.
