估算单 meaning in Chinese
pro form bill
pro forma bill
pro forma invoice
Examples
- A perturbation method by tight - binding approximation which provide the relation of phase constant and angular spectrum of fields of in - waveguide is presented . the strip width of phase constant can be given . on the other hand , the group delay - time due to the k dispersion in single - mode transmission can also be estimated
提出一种利用紧束缚近似的微扰法计算阵列波导的相位常数与输入光角谱的关系，由此算出相位常数的带宽，并利用衍射方法估算单模传输中k色散引起的群延时。 - In order to fully develop the theory of squeezed branch piles , in particular , the justification of its superior performance in terms of the bearing capacity and sinking displacement , we have derived the analytical formulas of the axial load and the strain at arbitrary depth ; based on existing static loading test results and research on belled pile , together with the analysis of on - site testing data , we have applied the expand theory on sphere holes to the computation of radial stress of squeezed branch piles under hole expansion ; taking the oil pressure of hole expansion in to account , we have find the a branch force under certain hole pressures , hence we can estimate the maximum bearing capacity of single piles ; we have introduced the experiential formulas for the bearing capacity of squeezed branch piles based on its stress characteristic and pile testing data ; we have also done numerical simulations of squeezed branch piles utilizing finite element method software ansys ; we have matched the simulation res ults with those of on - site basic load experiments , regenerating the distributions of stress fields and strain fields of squeezed branch piles , and from those distributions , we can determine the optimal distances between plates and piles
为了完善支盘桩的设计理论，探求支盘桩高承载力和低沉降量的内涵，本文推导出了支盘桩任意深度的截面荷载以及位移随深度变化的理论公式；基于已有的静载试验成果及有关扩底桩的研究成果，从对现场测试数据的分析，将球形孔扩张理论引入到支盘桩扩孔时径向应力的计算，考虑到扩孔时的油压数据，求得某一孔压下的支盘力，据此估算单桩极限承载力；同时根据对支盘桩的受力特点和试桩数据的分析，提出了支盘桩承载力计算的经验公式；用有限元分析的方法，利用大型有限元分析软件ansys对支盘桩进行数值模拟，并将模拟结果同现场的静载试验结果进行对比，再现了支盘桩在荷载作用下土中应力场和位移场的变化，根据应力场和位移场的变化范围，指出最佳盘间距和桩间距；为支盘桩的设计和施工提供了一个可量化的设计依据。