期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
Stewart formula and some inequalities for a simplex
1
作者 杨世国 《Journal of Chongqing University》 CAS 2005年第1期55-58,共4页
Problems on Stewart formula and inequalities for the areas of the bisection planes of the dihedral angles of a simplex are studied with the theory and method of distance geometry. Stewart formula and some inequalities... Problems on Stewart formula and inequalities for the areas of the bisection planes of the dihedral angles of a simplex are studied with the theory and method of distance geometry. Stewart formula and some inequalities for the areas of the bisection planes of the dihedral angles of a simplex in nE are established. 展开更多
关键词 SIMPLEX bisection plane Stewart formula INEQUALITY
下载PDF
Displacement of Building Cluster Using Field Analysis Method
2
作者 AI TinghuaAI Tinghua, associate professor, Ph.D, School of Resource and Environment Science, Wuhan University, 129 Luoyu Road, Wuhan 430079, China. 《Geo-Spatial Information Science》 2003年第2期55-62,共8页
This paper presents a field based method to deal with the displacement of building cluster, which is driven by the street widening. The compress of street boundary results in the force to push the building moving insi... This paper presents a field based method to deal with the displacement of building cluster, which is driven by the street widening. The compress of street boundary results in the force to push the building moving inside and the force propagation is a decay process. To describe the phenomenon above, the field theory is introduced with the representation model of isoline. On the basis of the skeleton of Delaunay triangulation, the displacement field is built in which the propagation force is related to the adjacency degree with respect to the street boundary. The study offers the computation of displacement direction and offset distance for the building displacement. The vector operation is performed on the basis of grade and other field concepts. 展开更多
关键词 map generalization DISPLACEMENT field analysis Delaunay triangulation building cluster
下载PDF
Exact Solutions of (2+1)-Dimensional Boiti-Leon-Pempinelle Equation with (G'/G)-Expansion Method
3
作者 熊守全 夏铁成 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第7期35-37,共3页
In this paper,we construct exact solutions for the (2+1)-dimensional Boiti-Leon-Pempinelle equation byusing the (G'/G)-expansion method,and with the help of Maple.As a result,non-travelling wave solutions with thr... In this paper,we construct exact solutions for the (2+1)-dimensional Boiti-Leon-Pempinelle equation byusing the (G'/G)-expansion method,and with the help of Maple.As a result,non-travelling wave solutions with threearbitrary functions are obtained including hyperbolic function solutions,trigonometric function solutions,and rationalsolutions.This method can be applied to other higher-dimensional nonlinear partial differential equations. 展开更多
关键词 (2+1)-dimensional Boiti-Leon-Pempinelle equation (G′/G)-expansion method hyperbolic function solutions trigonometric function solutions
下载PDF
Morley定理的一个新证明
4
作者 AlainConnes 李南 《数学译林》 2003年第2期190-192,共3页
关键词 Morley定理 证法 欧几里得 等边 三分角线 仿射群 不动点
原文传递
High accuracy in automatic detection of atrial fibrillation for Holter monitoring 被引量:8
5
作者 Kai JIANG Chao HUANG +1 位作者 Shu-ming YE Hang CHEN 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2012年第9期751-756,共6页
Atrial fibrillation(AF) has been considered as a growing epidemiological problem in the world,with a substantial impact on morbidity and mortality.Ambulatory electrocardiography(e.g.,Holter) monitoring is commonly use... Atrial fibrillation(AF) has been considered as a growing epidemiological problem in the world,with a substantial impact on morbidity and mortality.Ambulatory electrocardiography(e.g.,Holter) monitoring is commonly used for AF diagnosis and therapy and the automated detection of AF is of great significance due to the vast amount of information provided.This study presents a combined method to achieve high accuracy in AF detection.Firstly,we detected the suspected transitions between AF and sinus rhythm using the delta RR interval distribution difference curve,which were then classified by a combination analysis of P wave and RR interval.The MIT-BIH AF database was used for algorithm validation and a high sensitivity and a high specificity(98.2% and 97.5%,respectively) were achieved.Further,we developed a dataset of 24-h paroxysmal AF Holter recordings(n=45) to evaluate the performance in clinical practice,which yielded satisfactory accuracy(sensitivity=96.3%,specificity=96.8%). 展开更多
关键词 Atrial fibrillation Delta RR interval distribution difference curve Holter monitoring
原文传递
MINIMIZING A LINEAR FRACTIONAL FUNCTION SUBJECT TO A SYSTEM OF SUP-T EQUATIONS WITH A CONTINUOUS ARCHIMEDEAN TRIANGULAR NORM 被引量:1
6
作者 Pingke LI Edward P.Fitts Department of Industrial and Systems Engineering,North Carolina State University,Raleigh,NC 27695-7906,US Shu-Cherng FANG Edward P.Fitts Department of Industrial and Systems Engineering,North Carolina State University,Raleigh,NC 27695-7906,USA Department of Mathematical Sciences,Tsinghua University,Beijing 100084,China College of Management,Dalian University of Technology,Dalian 116024,China. 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2009年第1期49-62,共14页
This paper shows that the problem of minimizing a linear fractional function subject to asystem of sup-T equations with a continuous Archimedean triangular norm T can be reduced to a 0-1linear fractional optimization ... This paper shows that the problem of minimizing a linear fractional function subject to asystem of sup-T equations with a continuous Archimedean triangular norm T can be reduced to a 0-1linear fractional optimization problem in polynomial time.Consequently,parametrization techniques,e.g.,Dinkelbach's algorithm,can be applied by solving a classical set covering problem in each iteration.Similar reduction can also be performed on the sup-T equation constrained optimization problems withan objective function being monotone in each variable separately.This method could be extended aswell to the case in which the triangular norm is non-Archimedean. 展开更多
关键词 Fractional optimization fuzzy relational equations triangular norms.
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部