共查询到10条相似文献,搜索用时 78 毫秒
1.
Le Hoang Son 《Fuzzy Optimization and Decision Making》2017,16(3):359-378
In this paper, we extend the basic distance measure in picture fuzzy sets to the new measures called generalized picture distance measures and picture association measures. Some properties of these measures are examined. An application to clustering problem is given to illustrate applicability of the proposed works. 相似文献
2.
针对需要同时考虑属性关联性及整体均衡性多属性决策问题,联合图犹豫模糊集对于不确定信息的表达优势,提出一种基于图犹豫模糊Power Heronian平均算子的多属性决策方法。首先,给出图犹豫模糊数的得分函数、精确函数及距离公式;在此基础上,提出图犹豫模糊Power Heronian平均算子和图犹豫模糊Power加权Heronian平均算子;最后,将所提算子应用于多属性决策问题中,验证所提算子的有效性和可行性。 相似文献
3.
《European Journal of Operational Research》2002,140(2):197-211
In this paper we discuss the application of optimization techniques for the design of several parts of the color picture tube, the key component of television sets and computer monitors. These projects have been carried out for Philips Display Components in Eindhoven. Philips developed several computer simulation models of picture tube parts. Designers use these models to simulate the physical behavior of a particular part design. Depending on the amount of detail in the model, the running time of a typical simulation ranges from one up to 10 hours. Tube designers are confronted with the problem of finding settings for a large number of design parameters that are optimal with respect to several simulated tube characteristics. This problem can be modeled as a so-called high-cost nonlinear programming problem. This paper reports on the successful application of our four-step compact model approach to solve this problem. The presented results are based on four projects in which we optimized picture tube parts. Among the realized benefits for Philips are a design improvement of 30% and a time-to-market reduction of 50–60%. 相似文献
4.
Daniel S. Farley 《Geometriae Dedicata》2005,110(1):221-242
A class of groups, called picture groups, is defined. Richard Thompsons groups F, T, and V are all picture groups. Each picture group is shown to act properly and isometrically on a CAT(0) cubical complex. In particular, all picture groups are a-T-menable.Mathematics Subject Classifications (2000). 20F65, 43A15. 相似文献
5.
将观测定距的一般性问题归结为对于已知平面矩形的测距问题.将实物成像的标示点屏幕坐标作为已知观测数据,给出了物距的简明计算方法. 相似文献
6.
Ming Yu Chen 《数学学报(英文版)》2008,24(9):1525-1532
In this paper, we give a complete picture of the blow-up criteria for weak solutions of the Dirichlet problem of some doubly
degenerate nonlinear parabolic equations.
The project is supported by the Natural Science Foundation of Fujian Province of China (No. Z0511048) 相似文献
7.
针对决策信息为Picture模糊数的多属性决策问题,将经典范畴内的几何Heronian平均算子和幂几何算子结合,提出了Picture模糊幂几何Heronian平均(PFPGHM)算子与Picture模糊加权幂几何Heronian平均(PFWPGHM)算子。该类算子不仅能体现待集结数据间的关联性,而且还能反映决策过程中信息的整体性,降低了与整体信息偏差较大的待集结数据对决策结果的影响。推导其数学表达式,证明相关性质。提出了基于PFWPGHM算子的多属性决策方法,通过决策实例分析了参数p和q对决策结果的影响,并对比分析新方法与现存的决策方法,进而表明所研究方法的可行性与优点。 相似文献
8.
9.
In this paper, we prove that for non-effectively hyperbolic operators with smooth double characteristics exhibiting a Jordan
block of size 4 on the double manifold, the Cauchy problem is well-posed in the Gevrey 5 class, beyond the generic Gevrey
class 2 (see, e.g., [5]). Moreover, we show that this value is optimal, due to certain geometric constraints on the Hamiltonian
flow of the principal symbol. These results, together with results already proved, give a complete picture of the well-posedness
of the Cauchy problem around hyperbolic double characteristics. 相似文献
10.
We consider a picture for the filtration of a liquid in a partiallysaturated porous medium, leading to a two-phase one-dimensionalfree boundary problem of the following type: The liquid pressuresatisfies an elliptic equation in the saturated region and anon-linear parabolic equation in the unsaturated region, whilepressure and velocity are continuous across the interface. This scheme reduces to the study of the non-linear parabolicfree boundary problem in the unsaturated phase with cauchy dataprescribed on the free boundary, for such a problem existence,uniqueness and continuous dependence theorems are proved. 相似文献