The Study On The Growth Computing Model And Simulation Of Larch Root

The larch root which is composed of the primary root,the secondary root,the lateral root of primary root,and the lateral root of secondary root,is a branching tree structure.As all the levels of the roots have significantly self-similarity,this article is mainly to build a simulation model root growth of larch based on the L-system theory. According to the physiological function of root growth,it improve the root system of the larch on the water-based model and the geotropism model. It explore the impact on the morphology structure and physiological function of larch root by constraint based on artificial life methods.It have achieved dynamic simulation of the larch root growth because of the combination of morphology structure model and physiological function model.Larch root belongs to the straight root,which is composed of four different types of the roots.It include main root,secondary root, lateral root and adventitious root. Despite the obvious micro-similarity of the larch root,the root is affected by soil structure, humidity and other factors on the process of growth.So it makes that the process of the extension of the root system show irregular shape in random fluctuation patterns. In the text,it has established data structure,which can descripe the growth parameters of the larch root, on the basis of physiological ecological theory of larch.At the same time, dynamic growth model of the larch is integrated with morphogenetic model.Applying the random generation technology,it has abstracted rule description of the morphology and growth pattern of the larch root.It has introduced growth control parameters in order to achieve dynamic control in the data structure. It has achieved numerical algorithm which is easy to simulate in the computer with solution of the model design.Also,it has also achieved the computer simulation of the the larch root growth and water needs,with the simulation software based on B / S structure.As the environment have an impact on the survival,evolution and growth of the natural plant,it perform regional and spatial variability.The introduction of competition pattern in the sub-population is to optimize the model,and it has used evolutionary algorithm based on population category. The process of the larch root appears unusual,that is the choice,variation and evolution of the genetic algorithm.When the genetic algorithm is joined in the operation of the process of fractal,it can redesign parameters involved in the morphology structure model based on L-system.Finally it can generate different root morphology in the structure. The floating-point encoding is used in the functional model instead of binary encoding.The algorithm takes the kin individuals as population,at the initial stages,the evolution searching only in the population inside so that individuals' evolution can not be effect by the other populations and every population has chances to produce excellent individuals.After evolutionary computing several generations,this algorithm let all of the individuals compete and evolve each other so that the worse individuals gradually dying out of the individual competition.This algorithm fully maintains the diversity of populations,effectively conquers the premature convergence and local optimum solution.It describes evolution operators in detail.For the importance of variation operation in floating-point number coding,the paper used self-adapting adjusting variation operator,adjusted the variation steps based on individual self-adapting value,so that the better individuals vary in little steps in local region,enhance the precision,the worse individuals increase the steps to get out of the worse regions and enter into the prospective regions.