34results about How to "Improve evolutionary efficiency" patented technology

The invention discloses an image segmentation method for caged laying hens based on an improved active contour model. Extract the S-component image of the image of caged layer hens, use the k-means clustering method to divide the S-component image pixels in the square local window into two categories, traverse the S-component image to obtain two class center functions, and construct a The energy function of the function, and the average kernel function and the level set function are introduced into the energy function to form the total energy functional, and the standard gradient descent method is used to minimize the total energy functional to obtain the evolution equation of the boundary line, and the morphological opening operation and Gaussian filtering are added. Finally, the finite difference method is used to iterate the evolution equation of the boundary line until it converges, and the final evolution boundary line is the segmentation result of the image of caged layer hens. The invention can quickly and accurately segment the image of caged laying hens, and eliminate the influence of cage occlusion.

The invention discloses a phage-assisted multi-bacteria continuous directed evolution system and method. The system includes phage SM carrying a target gene to be evolved, various auxiliary plasmids HP supporting the proliferation of different SMs before and after evolution, and a mutation-inducing plasmid IP. Different HPs are placed in different host bacteria, which can effectively improve the proliferation and evolution efficiency of phages, and at the same time avoid the mutual interference between different gene elements, which has good practicability and can be used for the directed evolution of multiple genes.

The invention discloses an artificial wetland sewage treatment system which comprises filler areas of an upstream tank body and a downstream tank body, water pipe devices arranged in the filler areasand wetland emergent aquatic plants planted on the surfaces of the filler areas. The upstream tank body and the downstream tank body each comprise a supporting layer, a phosphorus adsorbing layer, a persistent organic pollutant decomposing and converting layer and a nitrogen adsorbing layer, wherein the supporting layer is prepared from gravel, the phosphorus adsorbing layer is prepared from limestone, the persistent organic pollutant decomposing and converting layer is prepared from bamboo carbon loaded nanoiron ceramsite, and the nitrogen adsorbing layer is prepared from zeolite. The artificial wetland sewage treatment system disclosed by the invention can reinforce nitrogen and phosphorus removal and reduce pollution load, achieves the purpose of reinforcing removal of pesticides and antibiotics in non-point source pollution caused by agricultural production and rural area cultivation industry at the same time, improves facility evolving efficiency and guarantees that system outletwater can reach a related high-quality reuse water standard.

The invention provides a multi-missile collaborative route calculation method based on a multi-target evolution method, which belongs to the technical field of task planning. The method specifically comprises the steps of: coding missile routes, defining missile mobility characteristics, modeling a planning area, generating route initial populations, evolving the route initial populations to generate new-generation route populations, evaluating the new-generation route populations to generate a rout set Q, evolving the route set Q among the populations to obtain a new-generation route set Q', evaluating the obtained new-generation route set Q', judging whether collaborative conditions are satisfied or not and the like. The method provided by the invention abandons the traditional route planning mode aiming at a single missile and can conduct collaborative planning to multiple missiles. By giving full consideration to the spatial conflict relationship and the attack arrival time relationship among the multiple missiles during planning, the realization of simultaneous set-time attacks to multiple enemy targets, saturation attacks to a certain enemy target and the like is facilitated and the attack efficiency is improved.