负质量 meaning in English

negative mass

When the two objects are at zero velocity , the total energy of the system is zero , because while the rocket ship made of positive matter has gained positive kinetic energy , the ball of negative matter has gained an equal amount of negative kinetic energy
当两个物体的速率都为零，整个系统的能量也为零，因为当正质量构成的火箭飞船获得正动能时，由负质量构成的球体也获得了等量的负动能。
The following aspects are involved in this dissertation : 1 ) properties of convergence of the network model under the circumstance of few rooms , the prediction of the early production tally with the growth of the fire in building on the whole while the prediction becomes most fallacious when the rooms increase to a certain number , for instance , 9 . the solution of the net mass flux , positive mass flux and negative mass flux is improved and then mass conservation is strictly maintained so that the prediction of the software become more credible and reliable
本文主要涉及以下几个方面: 1 )软件计算收敛性态在房间数目很少的情况下,软件开发的前期成果能在总体上成功预测建筑火灾的发展过程,当房间数目增加到一定的数目(如9 ) ,软件计算将出现剧烈振荡的问题,预测结果极不理想。本文改进了软件对净质量流量、正、负质量流量的求解,保证了三者之间的严格守恒关系。经过改进,软件的预测结果更可靠,更可信。