A simple method was presented for obtaining good approximate solutions of diffusionreaction boundary value problems in immobilized enzyme.Based on approximate solutions for diffusionreaction problems,the mathemati...A simple method was presented for obtaining good approximate solutions of diffusionreaction boundary value problems in immobilized enzyme.Based on approximate solutions for diffusionreaction problems,the mathematical expressions for calculating effectiveness factor of immobilized enzyme were proposed.Calculations of effectiveness factor were made with MichaelisMenten kinetic expression for spherical immobilized enzyme pellet.The results show that the agreement of approximate solution of effectiveness factor with numerical solution obtained by numerical method is satisfactory in a wider parameter range.The presented method for calculatin effectiveness factor of immobilized enzyme is simple and the calculation is fast.展开更多
隧道涌水是隧道建设及后期运营中最为常见的地质灾害,准确预测涌水量大小将为隧道设计及施工提供关键参数,因此隧道涌水量预测尤为重要。通过采用地下水动力学方法中的解析法(包括裘布依公式、古德曼公式等),结合数值模拟方法,以隧道导...隧道涌水是隧道建设及后期运营中最为常见的地质灾害,准确预测涌水量大小将为隧道设计及施工提供关键参数,因此隧道涌水量预测尤为重要。通过采用地下水动力学方法中的解析法(包括裘布依公式、古德曼公式等),结合数值模拟方法,以隧道导水断层为研究重点,对地处莲花山断裂带鸿图特长隧道典型段落(K91+634~K93+512)的最大涌水量和正常涌水量进行了预测。同时,利用已开挖段实测涌水量数值,将多种方法进行对比,分析研究各计算方法的适配性,并优化计算算法。研究表明,裘布依承压含水层公式预测与实际涌水量最为接近,鸿图特长隧道典型段落(K91+634~K93+512)的预测最大涌水量为119000 m 3/d,是极限情况下的涌水量预测,为设计施工开挖提供了可靠地水文地质参数。展开更多
文摘A simple method was presented for obtaining good approximate solutions of diffusionreaction boundary value problems in immobilized enzyme.Based on approximate solutions for diffusionreaction problems,the mathematical expressions for calculating effectiveness factor of immobilized enzyme were proposed.Calculations of effectiveness factor were made with MichaelisMenten kinetic expression for spherical immobilized enzyme pellet.The results show that the agreement of approximate solution of effectiveness factor with numerical solution obtained by numerical method is satisfactory in a wider parameter range.The presented method for calculatin effectiveness factor of immobilized enzyme is simple and the calculation is fast.
文摘隧道涌水是隧道建设及后期运营中最为常见的地质灾害,准确预测涌水量大小将为隧道设计及施工提供关键参数,因此隧道涌水量预测尤为重要。通过采用地下水动力学方法中的解析法(包括裘布依公式、古德曼公式等),结合数值模拟方法,以隧道导水断层为研究重点,对地处莲花山断裂带鸿图特长隧道典型段落(K91+634~K93+512)的最大涌水量和正常涌水量进行了预测。同时,利用已开挖段实测涌水量数值,将多种方法进行对比,分析研究各计算方法的适配性,并优化计算算法。研究表明,裘布依承压含水层公式预测与实际涌水量最为接近,鸿图特长隧道典型段落(K91+634~K93+512)的预测最大涌水量为119000 m 3/d,是极限情况下的涌水量预测,为设计施工开挖提供了可靠地水文地质参数。
