射影類群 的英文怎麼說
中文拼音 [shèyǐnglèiqún]
射影類群
英文
projective class group-
Based on these foundations, we give a perfect scheme of the bbo opos : single pass amplification coefficient of the opg under different pump intensity is calculated ; collinear type - i and type - ii phase matching tuning curve pumped by the q switch nd : yag various harmonics as well as noncollinear type - i tuning curve are calculated in details ; the effect of the walkoff for the nonlinear effect coefficient and the group velocity matching are analyzed ; the acceptance angle in parametric process is calculated ; the numerical threshold of the bbo opo is calculated ; the process of the saturation and depletion of the pump beam are analyzed ; the relationship of the conversion efficiency and reflectance of output mirror are discussed ; various linewidth controlling methods are discussed ; the improvement of the beam quality applying the unstable cavity is discussed ; and the crystal bbo design is considered
在此基礎上，給出了一整套bbo - opo激光參數設計方案：計算了不同泵浦強度下的參量放大倍數；詳細計算了在nd : yag調q激光器各次諧波泵浦條件下的共線類和類相位匹配的調諧曲線，以及非共線類相位匹配調諧曲線；分析了走離角對非線性系數和群速匹配的影響；計算了參量過程的允許角；計算了bbo - opo的理論閾值條件；分析了飽和與泵浦光束的消耗過程；給出了轉換效率與超過泵浦閾值的倍數的關系；討論了轉換效率與輸出鏡反射率的關系；討論了線寬控制的各種方法；研究了利用非穩腔改善光束質量的方法；考慮了bbo晶體的設計。The author carried out a comprehensive analysis and study on the competitive characteristics of shanghai in previous nationals games, and revealed the following findings : in the competition in the 5 ( superscript th ) to 10 ( superscript th ) national games, shanghai was able to exert its competitive strength steadily in the event groups of speed and power, accuracy, difficulty and beauty, and grapple ; while the change of its competitive strength in the event groups of speed, net involved competition, same court competition, and endurance, had directly affected the change of its position ; in addition, it is hopeful for events such as weight lifting, boating, shooting, table tennis and water ballet to become a new group of winning events of shanghai in national games
摘要對上海在歷屆全運上競技運動特徵進行分析，結果顯示：在5 ~ 10屆全運會比賽上，速度力量性項群、準確類、難美類和格鬥對抗性項群能穩定地發揮其競技實力，而速度、隔網對抗、同場對抗與耐力類項群競技實力的變化直接影響到名次的變遷；舉重、劃船、射擊、乒乓球、花樣游泳等項目有望成為上海全運會新一輪的制勝項目。
分享友人