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1)  pseudoradial flow
拟径向流
2)  imitate linearity and radial flow
拟线性径向流
3)  radial fitting
径向拟合
4)  runoff simulation
径流模拟
1.
Study on effects of spatial scale of rainfall to runoff simulation;
降雨空间尺度对径流模拟的影响研究
2.
Application of modified SCS model into runoff simulation;
改进的SCS模型在流域径流模拟中的应用
3.
SWAT model-based runoff simulation in Banchengzi Reservoir Catchment,Beijing;
基于SWAT模型的半城子水库流域径流模拟
5)  radial flow
径向流
1.
To these situations, study on Chang2 low permeable oilfield of Sai39 well district in Suijing oilfield has been conducted and the results show that when flowing time reaches three times of the starting time of radial flow, error of interpreting formation parameters and formation pres.
结果表明,当油井的流动时间达到3倍的地层径向流开始时间后,利用此时的压力数据,解释地层参数和地层压力,其结果的误差就会比较小,同时能较准确地判断边界类型。
2.
The results show that when the time of shut-in pressure survey triples the occurrence time of radial flow,the error of well-testing results about the formation parameters and formation pressure gained by pressure data at this moment is smaller than 5%.
结果表明,当油井关井测压时间达到3倍地层径向流开始出现的时间后,利用此时的压力数据解释地层参数和地层压力,其结果的误差小于5%,同时能较准确地判断边界类型。
3.
This paper introduces application of spherical and radial flow model in FMT wire line testing and puts forward a new method for verti- cal permeability estimation in homogeneous anisotropy formation.
介绍了球形流和径向流渗流模型在FMT地层测试中的应用,提出了一种在均质各向异性地层中确定水平渗透率和垂直渗透率的新方法,并用现场实例进行了验证,其计算结果和岩心分析渗透率基本吻合。
6)  radial flow
径向流动
1.
Because radial flow reactor has such merits as shorter flow path,lower resistance,smaller catalyst granularity and larger space velocity permitted,it has been abroad used in oil and chemical industry.
径向流动反应器具有流道短、阻力小、可使用小颗粒催化剂、空速大等优点 ,已在石油与化学工业中推广应用。
补充资料:非线性最小二乘拟合
分子式:
CAS号:

性质:用最小二乘法拟合非线性方程。有些变量之间的非线性模型,通过变量变换可以化为线性模型,此称为外在线性。而有些变量之间的非线性模型,通过变量变换不能化为线性模型,通称为内在非线性。对于非线性模型y=f(ξ,θ)+ε,其残差平方和。S(θ)是θ的函数,当模型关于θ是非线性的,正规方程关于θ也是非线性的。基于使残差平方和s(θ)达到极小的原理求出θ的估计值,拟合非线性回归方程。

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