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mass defect 【物理學】質量虧損。

mass flights

Specifically , to a test particle , its mass defect is am = m _ ( 0 ) - m , where mo and m are the mass of the particle when it is in the infinity and in the grav - itational field , respectively . to a spherical shell ( or a solid sphere ) , its mass defect is am = m _ ( 0 ) - m , where mo is the total mass of the matter scattering in the infinity and m is the mass of the gravitational spherical shell ( or the gravitational sphere ) combined by the matter scattering in the infinity 具體來說,對于試驗粒子,當它由無窮遠處運動到引力場中某點時,其質量由m _ 0變為m ,發生的質量虧損為m = m _ 0 - m ;對于球殼或固體球,當組成球殼或固體球的這些物質分散在無窮遠處時,總質量為m _ 0 ,當這些分散在無窮遠處的物質結合成球殼或固體球時,其質量變為m ,發生的質量虧損為m = m _ 0 - m 。

In order to detect the bottom thickness , cavity , leak and deformation of steel meshes in secondary lining of concrete in tunnel construction , the authors evaluate the wave character and the detected result in the second lining of the tunnel using surveying radar technology and conclude the wave character in the tunnel lining which has mass defect and tested the accuracy and reliability of this technique 摘要為檢明隧道混凝土二次襯砌中的底界厚度、空洞、漏水、鋼筋網變形等質量問題,利用探地雷達技術,通過對檢測方法及工程檢測實驗的研究,進行隧道二次襯砌中雷達波形特征參數及檢測結果評價,總結了隧道襯砌質量問題的雷達波形特征,驗證檢測方法的精度和可靠性。

At recent decade , accompany with surface mount technology printed - circuit board to produce fly of automation degree to soon develop , as to it ' s correspond of mass defect the inspection also put forward higher request , from in brief shoot to be like system to complicated “ 3 - d “ x optics to examine system , the automatic optical inspection is in great quantities adopt by the each production factory house 摘要在最近十年,伴隨著表面貼裝印刷電路板生產自動化程度的飛速發展,對其相應的質量缺陷檢查也提出了更高的要求,從簡單的攝像系統到復雜的“ 3 - d “ x光檢測系統,自動光學檢測系統大量被各生產廠家采用。