NOAH LAND SURFACE MODLE SOURCE CODE

一个drucker prager模型的 的用户子程序，用于求解平面应变问题 abaqus UMAT and inp(drucker prager yield model for abaqus )

利用双线性Z变换设计巴特沃斯和切比雪夫I型IIR数字滤波器，包括低通、高通、带通、带阻四种形式。使用者只需指定通带、阻带的边缘实际频率及相应的衰减，便可输出数字滤波器 的级联形式的各子系统分子、分母的系数，并输出其幅频和相频响(Bilinear Z transform design Butterworth and Chebyshev Type I IIR digital filters, including low pass, high pass, band pass, band stop four forms. Users simply specify the passband edge frequency stopband actual and corresponding attenuation subsystems can form molecular cascade output digital filter coefficients of the denominator, and the output of its magnitude and phase frequency response)

UEL beam单元，作者不详（网上下载，若作者有异议可通知本人删除）(UEL beam element)

利用散度法计算垂直速度，主要是缺测值的处理(Calculated using the vertical velocity dispersion, mainly dealing with missing data values)

SWAT模型的源代码。分布式水文模型SWAT在水文中享有较高的盛誉，它能够综合反映一个地区的水文地质状况，以及水文气象状况，而其源代码更是研究SWAT的必备“神器”，学习了解SWAT的源代码不仅可以在最短的时间内学习到SWAT的“精要”，更能学习其Fortran语言，了解模型到代码的转换，更能学习到其模型的“实质”。(Source code of SWAT model. The distributed hydrological model SWAT enjoys a high reputation in the hydrology, it can reflect a regional hydrogeological condition, and the hydrological and meteorological condition, and its source code is an essential artifact of SWAT, learn SWAT source code can learn not only to SWAT in the shortest time. "The essence of" better learning Fortran language, understand the conversion model to code, can learn the essence of the model "".)

材料随动硬化umat子程序，基于断裂力学可靠度计算方法(Material subroutine hardening UMAT subroutine, reliability calculation based on fracture mechanics.)

Umat Abaqus for plasticity

Nelder-Mead算法,三维搜索，用于孔隙结构很方便(three dimentional simplex search)

奥卡姆一维反演算法湾警员在2005这些博士 ；

用于描述地下水动力模拟计算，和水体压力，该代码简单容易看明白(water calculator)