Meixian is one of the best areas of eugenics Kiwi.This paper tries to conduct SWOT analysis of kiwi fruit from Mei County,Shanxi Province.This paper analyzes strengths and weaknesses,opportuni-ties and threats to development of kiwi fruit.Finally,the paper studies warehousing and distribution pat-terns of kiwi fruits and proposes targeted optimization strategies.
In this paper,by using potential well method,the existence of the global weak solutions for a class of semilinear dual-temperature equation is studied.The existence theorems of the global weak solu-tions,and some norm estimates of solutions and their derivatives are obtained.
The harmonic index and the second-order harmonic index of a graph G are defined as the sum of the weight 2du+dv of all edgesuv ofG and the sum of the weight 3 du+dv+dw of all 2-length paths uvw of G ,where du is the degree of a vertexu ofG ,denoted by H (G)and 2 H (G),respectively.In this paper,con-sidered the spiro hexagonal chains and the spiro hexagonal systems of the harmonic indices H (G),and seek out their extremal graphs were not unique.According to study the second-order harmonic index 2 H (G),they determined the extremal graphs of spiro hexagonal chains and found that the extremal graphs of spiro hexagon-al systems are a class of certain graphs.Finally,found a relation between the extremal graphs of H (G)and the extremal graphs of 2 H (G).A open problem on graph with harmonic index is proposed.
In this paper,by using the generalized variational principle and Riccati technique,new oscil-lation criteria for second order nonlinear damped perturbed differential equation (r(t)Ψ(y(t))y′(t)α-1y′(t))′+p(t)Ψ(y(t))y′(t)α-1y′(t)+q(t)f(y(t))=e(t)are established, which improve and generalize the existing results.
This article aims at the young university students groups,takes students as the obj ect of the questionnaire survey,analyzes the factors affecting tourism online shopping behavior from three aspects, which are tourism demand,tourism information collection and assessment and selection.Through factor a-nalysis and regression analysis,this paper find that travel agents presentations,site features and services have a negative influence on purchase decisions;cost savings,cost and payment security also have a posi-tive influence on college online shopping tourism product decision-making behavior.
