This paper proves that ndimensional compact maximal spacelike submanifolds in a de Sitter space S~(n+p)_p(c) are fully geodesic.
证明了de Sitter空间中的紧致极大类空子流形是全测地的。
Research on SOA Integration Testing and Security Testing;
SOA集成测试与安全测试研究
Taking a special Lithium-ion battery for a certain type PDA as example,the damage by high G impact for Lithium-ion battery is analyzed,and the Lithium-ion battery high G impact safety test technology is put forward.
结合某型号便携设备用锂离子电池分析了高G值冲击过程对电池的损害,研究了锂离子电池高G值冲击的安全测试技术。