inversion point meaning in English
倒反点
倒转点
反演点
逆转点
转化点；转换点
Examples
- Above the inversion point the temperature in the bore hole decreases as the depth decreases .
在反向点以上，井孔内的温度将随着深度的变浅而下降。 - ( 3 ) . there exists a deficiency of the axial symmetry rotor plus two quasi - particles model for odd odd nuclei that the vibration far away from the inversion point is smaller
( 3 ) .在研究奇奇核的二准粒子加轴对称转子模型中，存在着远离旋称反转点两端的劈裂幅度偏小的缺点。 - In the process of building and using the mass concrete structures , because of the effect of out - side condition and themselves , some faults will form in the structure , these faults will effect the bearing capability and endurance using nondestructive testing method to test the concrete ' s quality and diagnose its healthy , which has the significant sense in assessing the safety stability and research of the administering diseases this dissertation mostly researched the testing methods in the mass concrete structure , discussed the principles , methods , features , sphere of application of the ultrasonic testing in the mass concrete structure with faults , used dynamic fem to simulate the testing process , discussed when the concrete structure with cracks is under the effect of the pulse , how the elastic waves propagate and what are their changing feature , researched the principles of the first - arriving waves " phase when the cracks " depths are not same , obtained the relation between the inversion point and the cracks " depth , which has the direction sense in the application of projects , the second part of this dissertation is ct , which used the ultrasonic wave running through the tested - substance to get arriving - time of the ultrasonic wave , then inverse the image this dissertation drawed one ct program which can well present the different little cells " ultrasonic wave velocity profiles of the substance , thereby to diagnose the quality of the part of the tested - substance , ct has the better using foreground .
在混凝土结构的施工及使用过程中，由于受其自身及外界各种因素的影响，常常会产生一些缺陷，对结构物的承载能力和耐久性造成严重影响，采用无损检测技术进行质量检测和健康诊断，这对混凝土结构开展安全、稳定性评估以及病害隐患治理研究具有重要意义。本论文主要针对大体积混凝土结构缺陷的检测方法展开研究工作，重点讨论了超声波法检测混凝土结构裂缝的基本原理和方法及其特点、适用范围，运用动力有限元数值模拟其检测过程，探讨了有裂缝缺陷的混凝土结构在脉冲荷载作用下弹性波的传播及其变化特征，研究了不同裂缝深度下首波相位变化规律，得出了反转临界点与裂缝深度之间的关系，这对实际工程应用具有指导意义。声波ct是一种新的无损检测技术，它是利用声波穿透被检测体获取声波接收时间，来进行计算机反演成像的技术。