The HIT-PSI is a linear plasma device built for physically simulating the high heat flux environment of future reactor divertors to test/develop advanced target plate materials.In this study,the geometry-modified SOLP...The HIT-PSI is a linear plasma device built for physically simulating the high heat flux environment of future reactor divertors to test/develop advanced target plate materials.In this study,the geometry-modified SOLPS-ITER program is employed to examine the effects of the magnetic field strength and neutral pressure in the device on the heat flux experienced by the target plate of the HIT-PSI device.The findings of the numerical simulation indicate a positive correlation between the magnetic field strength and the heat flux density.Conversely,there is a negative correlation observed between the heat flux density and the neutral pressure.When the magnetic field strength at the axis exceeds 1 tesla and the neutral pressure falls below 10 Pa,the HIT-PSI has the capability to attain a heat flux of 10 MW·m-2 at the target plate.The simulation results offer a valuable point of reference for subsequent experiments at HIT-PSI.展开更多
The crystallographic nature of initial isothermal phase transformation in Cu-26Zn-4Al (wt-％) was investigated. The kinetic transforma- tion curve, morphology, crystal structure, substructure, orientation relationship...The crystallographic nature of initial isothermal phase transformation in Cu-26Zn-4Al (wt-％) was investigated. The kinetic transforma- tion curve, morphology, crystal structure, substructure, orientation relationship and twin relationship of bainite plates have been studied by means of optical and transmission electron microscopy. The experimental results showed that the characteristics of initial 8→bainite transformation are not exactly consistent with that found in martensite transformation, for example, orientation relationship between matrix and bainite does not exist in martensite transformation.展开更多
Twin boundaries among different variants in Nitinal R-phase were determined using group decomposition theory.It was found that there are four variants in the R-phase.The four variants may form three types of self-acco...Twin boundaries among different variants in Nitinal R-phase were determined using group decomposition theory.It was found that there are four variants in the R-phase.The four variants may form three types of self-accommodation group.The four variants are twin related with {100}_(p) and {100}_(p)as twin planes.These results are in good agreement with the experiment data.展开更多
Basing on the new method of trajectory stochastic treatment advanced by one of the authors of this paper,the theory of“clumps”in drift-wave turbulence in tokamak plasmas has been developed.It is shown that,as a long...Basing on the new method of trajectory stochastic treatment advanced by one of the authors of this paper,the theory of“clumps”in drift-wave turbulence in tokamak plasmas has been developed.It is shown that,as a longer time behaviour,plasmas in tokamaks will have the same“clumps”effects as those in uniform magnetic fields,although the diffusion crossing magnetic field Lines in tokmaks will be enhanced.The influence of the non-uniformity of the magnetic field,such as curvature,shear,etc.,on the transverse diffusion and the“clump”life-time is discussed.展开更多
Water soluble disperse dyes of either monoazo or anthraquinone types containing the carboxymethylsulfonylgroup（-SO2CH2COOH）were synthesized.Ammonium salts of this type of dyes are more soluble thanother salts.These ...Water soluble disperse dyes of either monoazo or anthraquinone types containing the carboxymethylsulfonylgroup（-SO2CH2COOH）were synthesized.Ammonium salts of this type of dyes are more soluble thanother salts.These dyes are suitable for pad dyeing or printing on polyester fiber and polyester/cottonblends in either weak acid,neutral or weak alkali medium without a dispersing agent.The formation of-SO2CH3 group from -SO2CH2COOH group after fixing on the fiber was proved.展开更多
MHD flow in sheared magnetic field is studied,and a new system of equations has been derived.Theoretical and numerical analysis shows that it implies a strange attractor and the effect of the shear on the attractor ex...MHD flow in sheared magnetic field is studied,and a new system of equations has been derived.Theoretical and numerical analysis shows that it implies a strange attractor and the effect of the shear on the attractor exhibits some new phenomena.展开更多
In the previous paper,a new vacuum state was defined.As claimed in that paper,this vacuum state is a thermal state in the ordinary sense.In this paper,we derive the Greens function of this vacuum and prove that it is ...In the previous paper,a new vacuum state was defined.As claimed in that paper,this vacuum state is a thermal state in the ordinary sense.In this paper,we derive the Greens function of this vacuum and prove that it is exactly the ordinary finite temperature thermal Green function.So we demonstrate that this state is exactly the thermally equilibrium state.展开更多
The quasi-conforming element of the curved beam and shallow curved beam is given in this paper. Numerical examples illustrate that the quasi-conforming elements of the curved beam and shallow curved beam which is used...The quasi-conforming element of the curved beam and shallow curved beam is given in this paper. Numerical examples illustrate that the quasi-conforming elements of the curved beam and shallow curved beam which is used to approximate the curved beam have better accuracy than the straight beam clement. The curved beam element constructed by displacement method can not satisfy rigid body motion condition and the very fine grids have to be used in order to satisfy rigid body motion condition approxtmately.In this paper it is proved that the straight beam element and the quasi-conforming element of the curved beam and shallow curved beam, when element size is reduced infinitely, have convergence rate with the same order O(l2) and when regular elements are used. I is the element length.展开更多
Fe-Cr-Co-V-Ti permanent magnets are characteristically free of harmful phase as V contributes to enlarging the α phase region. At an earlier date, the V content was fixed at 3～5％（wt％）（Kaneko, H. et al., 1976 an...Fe-Cr-Co-V-Ti permanent magnets are characteristically free of harmful phase as V contributes to enlarging the α phase region. At an earlier date, the V content was fixed at 3～5％（wt％）（Kaneko, H. et al., 1976 and 1978）, its Br and （BH）max values approach the level of semi-columnar crystal AlNiCO5 magnets, but its Hc value was less than 48.0 kA/m （600 Oe）. However, we later found that the efficient content of V might be展开更多
This note will discuss the problem about the structure of quasikernel families. Introducing self-bijective half-functors, we shall try to prove that the quasikernel families are their invariants. Then Theorem 3.8 of [...This note will discuss the problem about the structure of quasikernel families. Introducing self-bijective half-functors, we shall try to prove that the quasikernel families are their invariants. Then Theorem 3.8 of [1] will be extended to that展开更多
Recently, the boson bound states in Schwarzschild spacetime and Kerr spacetime has been discussed by some authors. It has been proved that the boson bound states in a Schwarzschild spacetime do not exist. In this pape...Recently, the boson bound states in Schwarzschild spacetime and Kerr spacetime has been discussed by some authors. It has been proved that the boson bound states in a Schwarzschild spacetime do not exist. In this paper, the work is extended to general 4-dimensional static Riemann spacetime. We find that no boson bound state solution exists, when energy w≠0 in an asymptotically flat static spacetime with non-degenerate horizon, and if cosmic censorship is a principle of Nature. When w=0, it depends on the metric. Only in some special spacetime, for example, in a Schwarzschild spacetime, can a rigorous proof be given.展开更多
基金Project supported by the National Key Research and Development Program of China(Grant No.2018YFE0303105)the Fundamental Research Funds for the Central Universities(Grant No.2022FRFK060021)the National MCF Energy Research and Development Program(Grant No.2019YFE03080300).
文摘The HIT-PSI is a linear plasma device built for physically simulating the high heat flux environment of future reactor divertors to test/develop advanced target plate materials.In this study,the geometry-modified SOLPS-ITER program is employed to examine the effects of the magnetic field strength and neutral pressure in the device on the heat flux experienced by the target plate of the HIT-PSI device.The findings of the numerical simulation indicate a positive correlation between the magnetic field strength and the heat flux density.Conversely,there is a negative correlation observed between the heat flux density and the neutral pressure.When the magnetic field strength at the axis exceeds 1 tesla and the neutral pressure falls below 10 Pa,the HIT-PSI has the capability to attain a heat flux of 10 MW·m-2 at the target plate.The simulation results offer a valuable point of reference for subsequent experiments at HIT-PSI.
文摘The crystallographic nature of initial isothermal phase transformation in Cu-26Zn-4Al (wt-％) was investigated. The kinetic transforma- tion curve, morphology, crystal structure, substructure, orientation relationship and twin relationship of bainite plates have been studied by means of optical and transmission electron microscopy. The experimental results showed that the characteristics of initial 8→bainite transformation are not exactly consistent with that found in martensite transformation, for example, orientation relationship between matrix and bainite does not exist in martensite transformation.
文摘Twin boundaries among different variants in Nitinal R-phase were determined using group decomposition theory.It was found that there are four variants in the R-phase.The four variants may form three types of self-accommodation group.The four variants are twin related with {100}_(p) and {100}_(p)as twin planes.These results are in good agreement with the experiment data.
文摘Basing on the new method of trajectory stochastic treatment advanced by one of the authors of this paper,the theory of“clumps”in drift-wave turbulence in tokamak plasmas has been developed.It is shown that,as a longer time behaviour,plasmas in tokamaks will have the same“clumps”effects as those in uniform magnetic fields,although the diffusion crossing magnetic field Lines in tokmaks will be enhanced.The influence of the non-uniformity of the magnetic field,such as curvature,shear,etc.,on the transverse diffusion and the“clump”life-time is discussed.
文摘Water soluble disperse dyes of either monoazo or anthraquinone types containing the carboxymethylsulfonylgroup（-SO2CH2COOH）were synthesized.Ammonium salts of this type of dyes are more soluble thanother salts.These dyes are suitable for pad dyeing or printing on polyester fiber and polyester/cottonblends in either weak acid,neutral or weak alkali medium without a dispersing agent.The formation of-SO2CH3 group from -SO2CH2COOH group after fixing on the fiber was proved.
文摘MHD flow in sheared magnetic field is studied,and a new system of equations has been derived.Theoretical and numerical analysis shows that it implies a strange attractor and the effect of the shear on the attractor exhibits some new phenomena.
文摘In the previous paper,a new vacuum state was defined.As claimed in that paper,this vacuum state is a thermal state in the ordinary sense.In this paper,we derive the Greens function of this vacuum and prove that it is exactly the ordinary finite temperature thermal Green function.So we demonstrate that this state is exactly the thermally equilibrium state.
基金The Project Supported by National Natural Science Foundation of China
文摘The quasi-conforming element of the curved beam and shallow curved beam is given in this paper. Numerical examples illustrate that the quasi-conforming elements of the curved beam and shallow curved beam which is used to approximate the curved beam have better accuracy than the straight beam clement. The curved beam element constructed by displacement method can not satisfy rigid body motion condition and the very fine grids have to be used in order to satisfy rigid body motion condition approxtmately.In this paper it is proved that the straight beam element and the quasi-conforming element of the curved beam and shallow curved beam, when element size is reduced infinitely, have convergence rate with the same order O(l2) and when regular elements are used. I is the element length.
文摘Fe-Cr-Co-V-Ti permanent magnets are characteristically free of harmful phase as V contributes to enlarging the α phase region. At an earlier date, the V content was fixed at 3～5％（wt％）（Kaneko, H. et al., 1976 and 1978）, its Br and （BH）max values approach the level of semi-columnar crystal AlNiCO5 magnets, but its Hc value was less than 48.0 kA/m （600 Oe）. However, we later found that the efficient content of V might be
文摘This note will discuss the problem about the structure of quasikernel families. Introducing self-bijective half-functors, we shall try to prove that the quasikernel families are their invariants. Then Theorem 3.8 of [1] will be extended to that
文摘Recently, the boson bound states in Schwarzschild spacetime and Kerr spacetime has been discussed by some authors. It has been proved that the boson bound states in a Schwarzschild spacetime do not exist. In this paper, the work is extended to general 4-dimensional static Riemann spacetime. We find that no boson bound state solution exists, when energy w≠0 in an asymptotically flat static spacetime with non-degenerate horizon, and if cosmic censorship is a principle of Nature. When w=0, it depends on the metric. Only in some special spacetime, for example, in a Schwarzschild spacetime, can a rigorous proof be given.
