Aiming at the decision-making problem of construction programme choice,this paper advanced a new group expandable optimization decision-making model.Various factors were comprehensively considered,and the new multi-at...Aiming at the decision-making problem of construction programme choice,this paper advanced a new group expandable optimization decision-making model.Various factors were comprehensively considered,and the new multi-attribute evaluation index system was established.Based on the assumption that decision-makers were rational,this paper formed a group of rational preferences through extracting the personal preferences pertinently,so the decision-makers position matrix was determined.The decision-makers position matrix integrated values given by group decision-makers to construction programme comprised a matrix,of which the entropy theory for datamining was adopted in this paper to determine the attribute weights.A decision was made by using the extension decision method.Eventually,the feasibility and practicability of the model were verified by the example.展开更多
With the central goal of profit maximization,economic rationality has been pursued by the so ciety under the capitalist mode of production,which has caused great dam age to the environment.Andre Gorz,the representativ...With the central goal of profit maximization,economic rationality has been pursued by the so ciety under the capitalist mode of production,which has caused great dam age to the environment.Andre Gorz,the representative of French ecological Marxism,put forward the conception of ecolo gical ratio nality,try ing to break away from the traditional economic rationality by centering on human beings and building an ecological socialist society in which human and nature co-exist harmoniously.Due to the institutional defects of capitalism in itself,Gorz’s conception of ecological rationality can only become a fantasy in capitalist countries.How ever,his ideas have a strong practical value for the construction of ecological civilization in so cialist countries.展开更多
This paper deals with rational interpolation. From algebraic viewpoint, we present an algebraic formulation of rational interpolation and discuss the existence of the interpolation function. Finally an algorithm for u...This paper deals with rational interpolation. From algebraic viewpoint, we present an algebraic formulation of rational interpolation and discuss the existence of the interpolation function. Finally an algorithm for univariate case and an example are presented.展开更多
The representation method of heterogeneous material information is one of the key technologies of het-erogeneous object modeling, but almost all the existing methods cannot represent non-uniform rational B-spline (NUR...The representation method of heterogeneous material information is one of the key technologies of het-erogeneous object modeling, but almost all the existing methods cannot represent non-uniform rational B-spline (NURBS) entity. According to the characteristics of NURBS, a novel data structure, named NURBS material data structure, is proposed, in which the geometrical coordinates, weights and material coordinates of NURBS heterogeneous objects can be represented simultaneously. Based on this data structure, both direct representation method and inverse construction method of heterogeneous NURBS objects are introduced. In the direct representation method, three forms of NURBS heterogeneous objects are introduced by giving the geometry and material information of control points, among which the homogeneous coordinates form is employed for its brevity and easy programming. In the inverse construction method, continuous heterogeneous curves and surfaces can be obtained by interpolating discrete points and curves with specified material information. Some examples are given to show the effectiveness of the proposed methods.展开更多
基金Project of Hunan Fund in Social Science (No.11YBB060)
文摘Aiming at the decision-making problem of construction programme choice,this paper advanced a new group expandable optimization decision-making model.Various factors were comprehensively considered,and the new multi-attribute evaluation index system was established.Based on the assumption that decision-makers were rational,this paper formed a group of rational preferences through extracting the personal preferences pertinently,so the decision-makers position matrix was determined.The decision-makers position matrix integrated values given by group decision-makers to construction programme comprised a matrix,of which the entropy theory for datamining was adopted in this paper to determine the attribute weights.A decision was made by using the extension decision method.Eventually,the feasibility and practicability of the model were verified by the example.
基金Project Name17 Technology Innovation Service Capability-Collaborative Innovation Center Construction of Socialist Theory with Chinese Characteristics in Beijing Colleges and Universities,Project No.036000546617516Beijing Science and Technology Research on Social Organization Development(S0027005201501)。
文摘With the central goal of profit maximization,economic rationality has been pursued by the so ciety under the capitalist mode of production,which has caused great dam age to the environment.Andre Gorz,the representative of French ecological Marxism,put forward the conception of ecolo gical ratio nality,try ing to break away from the traditional economic rationality by centering on human beings and building an ecological socialist society in which human and nature co-exist harmoniously.Due to the institutional defects of capitalism in itself,Gorz’s conception of ecological rationality can only become a fantasy in capitalist countries.How ever,his ideas have a strong practical value for the construction of ecological civilization in so cialist countries.
文摘This paper deals with rational interpolation. From algebraic viewpoint, we present an algebraic formulation of rational interpolation and discuss the existence of the interpolation function. Finally an algorithm for univariate case and an example are presented.
基金Supported by National Natural Science Foundation of China (No. 60973079)Natural Science Foundation of Hebei Province (No. E2006000039)
文摘The representation method of heterogeneous material information is one of the key technologies of het-erogeneous object modeling, but almost all the existing methods cannot represent non-uniform rational B-spline (NURBS) entity. According to the characteristics of NURBS, a novel data structure, named NURBS material data structure, is proposed, in which the geometrical coordinates, weights and material coordinates of NURBS heterogeneous objects can be represented simultaneously. Based on this data structure, both direct representation method and inverse construction method of heterogeneous NURBS objects are introduced. In the direct representation method, three forms of NURBS heterogeneous objects are introduced by giving the geometry and material information of control points, among which the homogeneous coordinates form is employed for its brevity and easy programming. In the inverse construction method, continuous heterogeneous curves and surfaces can be obtained by interpolating discrete points and curves with specified material information. Some examples are given to show the effectiveness of the proposed methods.
