排序方式: 共有81条查询结果,搜索用时 31 毫秒
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从运动磁单极子产生的流密度方程出发,研究了在中心力场中沿双曲线运动磁单极子辐射能量谱,并对其进行数值计算.分析了磁单极子在等离子体中沿双曲线运动的辐射特点. 相似文献
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非相对论性等离子体纵振荡的色散关系 总被引:1,自引:1,他引:0
从等离子体动力论方程出发,通过对由原色散函数表示的色散方程进行数值计算来研究非相对论性等离子体纵振荡的色散关系.得到了除朗缪尔波、离子声波和离子等离子体波外其它纵波的色散曲线和拟合色散关系.在对色散曲线进行拟合时,得出了曲线中不同部分的最佳拟合式. 相似文献
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对无磁化、无碰撞、各向同性等离子体中横振荡的色散方程进行了数值计算,得出了数值模拟的非相对论性等离子体横振荡色散曲线,并进一步对色散曲线做了拟合,得到了其拟合色散关系. 相似文献
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相对论性纵"等离激元"色散关系 总被引:3,自引:2,他引:1
对完全相对论性纵“等离激元”的色散方程进行数值计算,得到完全相对论性温度下的色散曲线和拟合色散关系。 相似文献
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Structural,mechanical, electronic properties,and Debye temperature of quaternary carbide Ti3NiAl2C ceramics under high pressure: A first-principles study 下载免费PDF全文
Quaternary carbide Ti3NiAl2C ceramics has been investigated as a potential nuclear fusion structural material,and it has advantages in certain aspects compared with Ti2AlC,Ti3AlC2,and Ti3SiC2 structural materials.In this paper,quaternary carbide Ti3NiAl2C ceramics is pressurized to investigate its structural,mechanical,electronic properties,and Debye temperature.Quaternary carbide Ti3NiAl2C ceramics still maintains a cubic structure under pressure(0–110 GPa).At zero pressure,quaternary carbide Ti3NiAl2C ceramics only has three bonds:Ti–Al,Ni–Al,and Ti–C.However,at pressures of 20 GPa,30 GPa,40 GPa,60 GPa,and 70 GPa,new Ti–Ni,Ti–Ti,Al–Al,Ti–Al,and Ti–Ti bonds form.When the pressure reaches 20 GPa,the covalent bonds change to metallic bonds.The volume of quaternary carbide Ti3NiAl2C ceramics can be compressed to 72%of its original volume at most.Pressurization can improve the mechanical strength and ductility of quaternary carbide Ti3NiAl2C ceramics.At 50–60 GPa,its mechanical strength can be comparable to pure tungsten,and the material changes from brittleness to ductility.However,the degree of anisotropy of quaternary carbide Ti3NiAl2C ceramics increases with the increasing pressure.In addition,we also investigated the Debye temperature,density,melting point,hardness,and wear resistance of quaternary carbide Ti3NiAl2C ceramics under pressure. 相似文献
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在计入离子运动对色散关系产生影响的基础上,数值求解了完全简并金属等离子体中纵振荡的完全色散关系.将其色散曲线与纯电子等离子体色散曲线对比,得到了是否需要考虑离子贡献的分界线.此外,对比不同电子-离子温度比值、不同电子温度、不同密度的色散曲线.还得到了电子一离子温度之比不影响色散关系、密度越大振荡的截止频率就越大等结论. 相似文献