排序方式: 共有38条查询结果,搜索用时 31 毫秒
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LF上(下)δ-弱半连续多值映射及其性质 总被引:1,自引:0,他引:1
利用δ-开集引入LF上(下)δ-弱半连续多值映射及δ-弱半连续多值映射等概念,研究了它们的若干等价刻划及性质。 相似文献
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Single- and Double-Electron Capture Processes in Low-Energy Collisions of N~(4+) Ions with He
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We investigate the electron capture processes of N4+(1s22s) colliding with He(1s2) in the energy range of 10-1700 eV/amu using the quantum-mechanical molecular-orbital close-coupling(QMOCC) method.Total and stateselective single-electron capture and double-electron capture(SEC and DEC) cross sections are obtained and compared with other available studies.The results agree better with the experimental data in both trend and magnitude when the electron translation ... 相似文献
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高效液相色谱梯度洗脱法测定中国山茶叶成分 总被引:1,自引:0,他引:1
本文叙述了中国山茶叶中茶碱及儿茶素组分的反相高效液相色谱梯度洗脱分离及测定方法。该法准确、灵敏,各组分的变异系数在1.31%~3.28%范围内。茶碱及儿茶素组分的定量灵敏度分别为0.1μg和0.03μg。 相似文献