Simulaneous spectrophotometric determination of iron , cobalt and nickel by k - ratio and h - point standard addition method 点标准加入分光光度法同时测定铁钴镍的研究
Based on finite difference technique , a new numerical simulation program on hemispherical gas cloud was worked out by homogeneous energy addition method and artificial viscosity , with which deflagration parameters were computed 利用能量均匀加入法和有限差分技术,编制了半球形气云爆炸过程的计算程序。
This thesis realizes the computation of sigmoid function , which is a commonly used non - linear transfer function in bp network , using a stam ( symmetric table and addition method ) method 文中采用了一种stam ( symmetrictableandadditionmethod )方法在fpga器件上,实现了bp网络最为常用的一种非线性传递函数? ? sigmoid函数的近似计算。
A method called " k - ratio h - point standard addition method " was proposed for the simultaneous determination of nitrate and nitrite , based on their ultraviolet absorption spectrum in a neutral medium 摘要研究了在近中性介质中,硝酸根与亚硝酸根的紫外吸收光谱,提出了引用“ k比例h点标准加入法”同时测定了硝酸根、亚硝酸根含量的方法。
Effects of maintenance and raise of water level at yichang station by river bottom protection and roughness addition method and pool back - fill method in the reach from yichang to zhicheng of the changjiang river are calculated and compared by using a 2 - d flow numerical simulation method 摘要运用二维水流数值模拟方法,计算比较了在宜昌枝城的长江河段内选取重点控制河段,进行护底加糙及回填深槽对维护并抬高宜昌水位的效果。