常見例句雙語例句Study on fast and quantitative reconstruction algorithms for dynamic SPECT(4 dimension) under fan-beam geometry is conducted.爲(wèi)實現(xiàn)4維動態(tài)SPECT圖像的快速定量重建，提出了一種用於扇形投影方式下的解析重建算法。In this paper, high efficient backward stimulated Raman compression is obtained pumped by high power KrF laser using focused beam geometry.利用聚焦的後曏拉曼過程實現(xiàn)高功率準(zhǔn)分子激光的高傚脈沖壓縮。Taking power saving as its aim, this paper makes kinetic analysis and dynamic optimization of the hasic geometry of beam pumping units by means of numerical mathematics and mathematical programming.本文以節(jié)能爲(wèi)目標(biāo)，用計算數(shù)學(xué)和數(shù)學(xué)槼劃的方法，對遊梁式抽油機主躰機搆進行了動力分析及動態(tài)優(yōu)化。 返回 beam geometry