Gas content of 14 points in Gaocheng Colliery was calculated with back calculation formula which may be used after 0.6 was multiplied to it as modification.
Comparing the result of inverse calculation and the testing result indicates: the result of direct and fast shear test is nearest to inverse calculation.
For applying B-spline curved surface to the modelling of gas mask,this paper chooses the uniform bicubic B-spline carved surface as mathematical model and centres on the inverse computation of B-spline control vertices and the joggle of curved surfaces.
本文选用双三次均匀基 B 样条曲面为数学漠型,着重讨论了 B 样条曲面在不同边界条件下顶点反算和曲面拼合问题.
This method presented the criteria for the acceleration of failure by slope-sliding and was able to do inverse computation of parameters of machanics on slide surface.
The attrition coefficients were determined by using the tactics of random target distribution and the air\|to\|air capability index of the combat aircraft. Taking the mathematical model and the superiority parameter as core, calculations and analyses of the complicate systemic problems such as evaluation of battle superiority, prognostication of combat process, inverse computation of weapon system amount and optimization of collocations have been accomplished.
The parameter back-calculation of the pavement layer's resilient elastic modulus and its nonlinear parameters in stress-strain relation to know the stress condition of the pavement is the key to evaluate the pavement bearing ability.
Most back-calculation theories are based on the linear elastic layer system and quietude analysis method, which neglected the nonlinear peculiarity of the pavement material.
To simplify the parameters back calculation, the fractal model proposed by Tyler and Wheatcraft was introduced to describe the characters of grain size distribution variation.
Back calculation using published stage duration estimates indicates March/April as the begin of the reproductive and growth period for these species under the first-year ice of the Barents Sea.
By determining the equilibrium state, the true values of data influencing the back calculation of shear strength on the known slip surface can be established.
This method requires a set of in situ displacement measurements of shotcrete layer for back calculation, and the constitutive relationship of the structural materials which are shotcrete, and concrete here is assumed to be linear elastic.
The advantage of this method is that it avoids those complicated characteristics of rock masses and the loads from back calculation can reflect the combinative effects of rock surrounding the tunnel.
反算
back calculation
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