为了提高热水法浸提猴头菇多糖得率,应用单因素试验和响应面法对热水法浸提猴头菇多糖工艺进行优化。用单因素试验对浸提工艺进行初步优化,结果表明水料比、浸提温度和浸提时间对多糖得率均有显著影响。在此基础上,用响应面法优化,构建...为了提高热水法浸提猴头菇多糖得率,应用单因素试验和响应面法对热水法浸提猴头菇多糖工艺进行优化。用单因素试验对浸提工艺进行初步优化,结果表明水料比、浸提温度和浸提时间对多糖得率均有显著影响。在此基础上,用响应面法优化,构建多糖得率的三元二次回归方程。通过对响应面图和等高线图进行分析得到回归拟合方程的决定性系数(R2Adj)为0.9825,表明响应面模型能够代替试验真实点对多糖得率进行预测。响应面优化结果表明,热水法浸提猴头菇多糖的最优工艺为:水料比33 m L/g、浸提温度92℃、浸提时间134 min。在最优工艺条件下,多糖得率为4.98%,非常接近响应面预测值,说明采用响应面法优化得到的浸提工艺参数可靠。展开更多
A systematic approach was presented to develop the empirical model for predicting the ultimate tensile strength of AA5083-H111 aluminum alloy which is widely used in ship building industry by incorporating friction st...A systematic approach was presented to develop the empirical model for predicting the ultimate tensile strength of AA5083-H111 aluminum alloy which is widely used in ship building industry by incorporating friction stir welding(FSW) process parameters such as tool rotational speed,welding speed,and axial force.FSW was carried out considering three-factor five-level central composite rotatable design with full replications technique.Response surface methodology(RSM) was applied to developing linear regression model for establishing the relationship between the FSW process parameters and ultimate tensile strength.Analysis of variance(ANOVA) technique was used to check the adequacy of the developed model.The FSW process parameters were also optimized using response surface methodology(RSM) to maximize the ultimate tensile strength.The joint welded at a tool rotational speed of 1 000 r/min,a welding speed of 69 mm/min and an axial force of 1.33 t exhibits higher tensile strength compared with other joints.展开更多
文摘为了提高热水法浸提猴头菇多糖得率,应用单因素试验和响应面法对热水法浸提猴头菇多糖工艺进行优化。用单因素试验对浸提工艺进行初步优化,结果表明水料比、浸提温度和浸提时间对多糖得率均有显著影响。在此基础上,用响应面法优化,构建多糖得率的三元二次回归方程。通过对响应面图和等高线图进行分析得到回归拟合方程的决定性系数(R2Adj)为0.9825,表明响应面模型能够代替试验真实点对多糖得率进行预测。响应面优化结果表明,热水法浸提猴头菇多糖的最优工艺为:水料比33 m L/g、浸提温度92℃、浸提时间134 min。在最优工艺条件下,多糖得率为4.98%,非常接近响应面预测值,说明采用响应面法优化得到的浸提工艺参数可靠。
文摘A systematic approach was presented to develop the empirical model for predicting the ultimate tensile strength of AA5083-H111 aluminum alloy which is widely used in ship building industry by incorporating friction stir welding(FSW) process parameters such as tool rotational speed,welding speed,and axial force.FSW was carried out considering three-factor five-level central composite rotatable design with full replications technique.Response surface methodology(RSM) was applied to developing linear regression model for establishing the relationship between the FSW process parameters and ultimate tensile strength.Analysis of variance(ANOVA) technique was used to check the adequacy of the developed model.The FSW process parameters were also optimized using response surface methodology(RSM) to maximize the ultimate tensile strength.The joint welded at a tool rotational speed of 1 000 r/min,a welding speed of 69 mm/min and an axial force of 1.33 t exhibits higher tensile strength compared with other joints.
