This paper introduces a methodology for soil slope stability analysis based on optimization, limit equilibrium principles and method of slices. In this study, the slope stability analysis problem is transformed into a constrained nonlinear optimization problem. To solve that, a Self-Adaptive Genetic Algorithm (GA) is utilized. In this study, the slope stability safety factors are the objective ...

Topographic factors are essential to the spatial distribution of ridge orientation, yet literature shows limited exploration mechanisms underlying effects terrain on cultivated-land orientation in a black soil region. To better understand this subject, interpretation, statistical analyses and field verification were carried out Songnen Plain, typical Mollisol area. The results revealed that inc...

We construct unconditionally stable, unconditionally uniquely solvable, and secondorder accurate (in time) schemes for gradient flows with energy of the form ∫ Ω(F (∇φ(x))+ 2 2 |Δφ(x)|2) dx. The construction of the schemes involves the appropriate combination and extension of two classical ideas: (i) appropriate convex-concave decomposition of the energy functional and (ii) the secant method. A...

Liquid-liquid extraction and solid phase followed by high-performance liquid chromatography (HPLC) connected with ultraviolet (UV) detection were used for the determination of phytohormones. The parameters influencing performance HPLC-UV method, including composition mobile gradient elution, column temperature, flow rate, wavelength, optimized. This method can simultaneously determine 11 phytoh...

During the week of 7-14 March 2006, observations of winds and relative humidity were taken at various points along the mountain at Storm Peaks Laboratory in Steamboat Springs, CO. These observations were used to determine the relationship between slope flow and relative humidity. Slope flow is defined as the dot product of the wind vector and the gradient in elevation. The charts show details a...