共查询到20条相似文献,搜索用时 109 毫秒
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基于粗糙集的患者满意度评价模型及其实证分析 总被引:1,自引:0,他引:1
在文献阅读及实地调研的基础上,本文提出了患者满意度的定义,建立了影响患者满意度的指标体系,介绍了粗糙集的相关概念及利用粗糙集进行评价的步骤,提出了新的约简方法,构建了基于粗糙集的患者满意度评价模型并进行了实证分析,得出了影响患者满意度的关键指标,并计算了关键指标权重,对江西省十个医院进行了综合评价值的计算. 相似文献
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对一类积分型中值定理做了进一步的研究,减弱了定理的条件并加强了定理的结论,得到了一个更加一般的结果,并对该定理"中间点"的渐进性做了讨论,推广了已有的成果. 相似文献
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系统动力学在城市污水再生回用系统中的应用 总被引:5,自引:0,他引:5
用系统动力学方法研究了城市污水回用系统.首先分析了影响城市污水回用系统的诸多因素以及它们之间的相互关系,探讨了污水再生回用系统行为和结构的特点,确定了系统中因素之间的定量关系,建立了城市污水回用系统动力学(SD)模型,并介绍了模型的检验方法.同时给出了SD模型的具体应用实例,对西北地区的某一城市的污水回用进行了预测和分析,提出了符合该城市发展的污水回用方案. 相似文献
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分层教学的Bayes分析 总被引:3,自引:0,他引:3
对学校分层教学进行了初步探索 ,提出了分层分班的 Bayes决策 ,介绍了分层分班方法 ,获得了一些结论 ,并完成了对这些结论的证明 ,从理论上论述了分层教学是实施“因材施教”教育原则和素质教育的有效途径 ,给出了应用实例 . 相似文献
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《数学的实践与认识》2013,(13)
论述了防空武器系统服务效能的概念,提出了服务效能的评估指标,做出了符合防空作战一般规律的假设,据此,通过概率论的方法分析了对抗系统的各种状态,论证了系统统计平衡状态的存在,进而建立了数学解析模型,最后得出了对防空武器系统服务效能的定量评估指标. 相似文献
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基于最大满意度的研究生录取问题 总被引:1,自引:0,他引:1
采用了模糊数学的知识和优化方法讨论解决了研究生的录取问题.首先对相关数据进行了合理的量化,然后定义了导师与学生之间的相互满意度,建立了择优录取和双向选择的优化模型,通过求解得到了理想的结果. 相似文献
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研究一类Kolmogorov捕食系统dx/dt=x(a_0-a_1x+a_2x~(n-1)-a_3x~n+a_4xy~m),dy/dt=y(b_1x~n-b2),得到了存在唯一极限环和不存在极限环的充要条件,从而推广了前人相关的结果. 相似文献
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Lijuan Chen 《Journal of Applied Mathematics and Computing》2010,34(1-2):207-232
In this paper, we study the following delayed predator-prey model of prey dispersal in two-patch environments $$\begin{array}{rcl}\dot{x}_1(t)&=&\displaystyle x_1(t)[r_1(t)-a_{11}(t)x_1(t)-a_{13}(t)y(t)]+D(t)(x_2(t)-x_1(t)),\\[3mm]\dot{x}_2(t)&=&\displaystyle x_2(t)[r_2(t)-a_{22}(t)x_2(t)-a_{23}(t)y(t)]+D(t)(x_1(t)-x_2(t)),\\[3mm]\dot{y}(t)&=&\displaystyle y(t)[-r_3(t)+a_{31}(t)x_1(t-\tau_1)+a_{32}(t)x_2(t-\tau _1)-a_{33}(t)y(t-\tau_2)].\end{array}$$ By giving the detail analyzing of the right-hand side functional of the system, sufficient and necessary condition which guarantee the predator and the prey species to be permanent are obtained. Numeric simulations show the feasibility of main results. In additional to the above, sufficient condition on the permanence of the above system with predator density-independence are established. 相似文献
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In this paper we investigate the integrability problem for the two-dimensional Lotka-Volterra complex quartic systems which are linear systems perturbed by fourth degree homogeneous polynomials, that is, we consider systems of the form $\dot{x}=x(1-a_{30}x^{3}-a_{21} x^{2} y-a_{12}x y^{2} -a_{03}y^{3})$ , $\dot{y}=-y(1-b_{30}x^{3}-b_{21} x^{2} y-b_{12}x y^{2}-b_{03} y^{3})$ . Conditions for the integrability of this system are found. From them the center conditions for corresponding real system can be derived. The study relays on making use of algorithms of computational algebra based on the Groebner basis theory. To simplify laborious manipulations with polynomial modular arithmetics is involved. 相似文献
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We characterize the Liouvillian and analytic integrability of the quadratic polynomial vector fields in R2 having an invariant ellipse.More precisely,a quadratic system having an invariant ellipse can be written into the form x=x2+y2-1+y(ax+by+c),y=x(ax+by+c),and the ellipse becomes x2+y2=1.We prove that(i) this quadratic system is analytic integrable if and only if a=0;(ii) if x2+y2=1 is a periodic orbit,then this quadratic system is Liouvillian integrable if and only if x2+y2=1 is not a limit cycle;and(iii) if x2+y2=1 is not a periodic orbit,then this quadratic system is Liouvilian integrable if and only if a=0. 相似文献
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在模糊Banach空间中研究了混合泛函方程f(x+ky)+f(x-ky)=k~2f(x+y)+k~2f(x-y)+2(1-k~2)f(x)+(k~2(k~2-1))/12(f(2y)-4f(y))的Hyers-Ulam稳定性,这里k>1是固定的一个整数,f(y)=f(y)+f(-y). 相似文献
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This paper investigates the global asymptotic stability of the autonomous planar systems $ \dot {x} = p_2(y)q_2(x)y $ , $ \dot {y} = p_3(y)q_3(x)x + p_3(y)q_4(x)y $ and $ \dot {x} = f_1(x) + h_2(x)y $ , $ \dot {y} = f_3(x) + h_4(x)y $ , under the assumption that all functions involved in the equations are continuous and that the origin is a unique equilibrium. We present necessary and sufficient conditions for the origin to be globally asymptotically stable. 相似文献
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金慧萍 《数学的实践与认识》2010,40(18)
证明了非多项式型周期Hamilton方程dx/dt=αH/αY(x,y,t),dy/dt=αH/αx(x,y,t)的Lagrange稳定性,其中Hamilton函数H(x,y,t)=,p_(i,j)是x,y和t的C~∞周期函数,i,j满足适当的上限条件. 相似文献
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We find conditions under which the system of root functions of the operator is a Riesz basis in L 2[0, 1].
相似文献
$$L_y = l[y] = ay'(x) + y'(1 - x) + p_1 (x)y(x) + p_2 (x)y(1 - x),x \in [0,1],U_1 (y) = \int\limits_0^1 {y(t)d\sigma (t) = 0,} $$
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给出了一类二阶变系数常微分方程y″+[pu(x)-v(x)]y′+[qu2(x)+r(u(x)v(x)-u(′x))]y=f(x)及y″+[pu(x)-v(x)]y′+[qu2(x)+r(u(x)v(x)-u(′x))]y=f(x)[y-′ru(x)y]n可积的充分条件及其通解表达式,并举例说明它的应用. 相似文献