Tianxiao Li

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In order to improve the fitting and forecasting precision and solve the problem that some data have less sensitivity leading to low simulation precision of partial least-squares regression model, particle swarm optimization algorithm is adopted to optimize the partial regression coefficient, and then partial least-squares regression model based on particle(More)
Keywords: Seasonal frozen soil Water–heat coupled movements Numerical simulation Finite difference method a b s t r a c t In view of the insufficiencies of existing research into soil water and heat movements in seasonally frozen soil regions, water–heat coupled movements in seasonally frozen soil were studied by using a numerical simulation method. On the(More)
Cultivating rice will get both obvious economic and social benefits, but extending the paddy field area blindly and extensive irrigation water management mode have also brought some negative effects. Therefore, determining the scale of paddy field development reasonably has become an important issue in the planning of regional farming. The future of the(More)
The accurate and reliable prediction of groundwater depth is the basis of the sustainable utilization of regional groundwater resources. However, the complexity of the prediction has been ignored in previous studies of regional groundwater depth system analysis and prediction, making it difficult to realize the scientific management of groundwater(More)
The identification of freezing-thawing soil hydraulic properties is the basis and key problem of studying soil water movement. Current identifying methods of the properties have many limitations, such as big error, high uncertainty and low operability. Thus, the identifying method of freezing-thawing soil hydraulic properties was researched in the research.(More)
—In order to improve fitting and forecasting precision and solve the problem that some data with less sensitivity lead to low simulation precision of partial least-squares regression (PLS for short) model, the new method of simulating freezing depth is presented according to ground temperature of different depths, air temperatures, surface temperatures and(More)