Measuring hull ' s main dimensions : length overall ( loa . ) , length between perpendiculars ( lpp . ) , breath molded ( b . ) , depth molded ( d . ) and deflection before launching 下水前測(cè)量船體主尺度:總長(zhǎng)、兩柱間長(zhǎng)、型寬、型深、基線撓度。
We find that the relations between the electronic effective mass of lowest - lying conduction band and wave vector are resemble , not only for narrow - gap semiconductor zigzag tubes but also for wide - gap semiconductor zigzag tubes . the electronic effective masses at bottom of lowest - lying conduction band depend on their tube - diameters 我們發(fā)現(xiàn),無(wú)論是鋸齒型窄隙半導(dǎo)體管還是鋸齒型寬隙半導(dǎo)體管,同一類管的最低導(dǎo)帶的電子有效質(zhì)量隨波矢變化的規(guī)律基本相同,且其導(dǎo)帶底的電子有效質(zhì)量隨管徑的增大而減小。