利用该回归模型进行抗压强度的计算，可以为建立油井出砂的理论预测模式提供较为准确的岩石抗压强度数据。
The computed rock compressive strength with the established regression model can support exact compressive strength for the establishing of sand prediction model for oil well.
由于在焊缝部位存在焊接缺陷，采用传统的建立在构件无缺陷、无裂纹基础上的强度理论进行设计计算时，往往不能确保起重机在额定载荷下使用的安全性。
Since there are weld defects in welds, using traditional strength theory based on no defect and no crack to design, crane's security in rating load can't be insured.
同时，提出了这类双壳大舱口船舶扭转强度的理论计算方法。
Moreover, the paper presents a relatively simple and comprehensive theoretical method for torsional strength calculation.
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