Approximate solutions for nonlinear transverse vibrations of elastically restrained tapered beams

This paper introduces the approximate solutions of the mathematical model of an elastically restrained tapered beam. At the beginning of the study, the equation of motion is derived in a detailed way. The frequency–amplitude relation is deduced and solved numerically. The nonlinear natural frequencies for the transverse vibrations of an elastically restrained tapered beam are provided using Mathematica software. The max–min approach, the frequency–amplitude method and the parameter-expansion method are applied in order to obtain an approximated solution. The approximate analytical results are further compared with the numerical results for both small and large amplitude oscillations, and very good agreement is observed.     

The evaluation of hospital service quality by fuzzy MCDM

This study applies the Multiple Criteria Decision Making (MCDM) to evaluate the service quality of some Turkish hospitals. In general the service quality has abstract properties, which mean that using the previously known measurement approach is insufficient. It is for this reason that the fuzzy set theory is adopted as a research template. In Istanbul, Turkey, there are four B class hospitals classed as private hospitals that are covered by the Social Security Institution (SSI) and for which we propose to represent the service performance measurement using triangular fuzzy numbers. In this study, importance weights of performance criteria are found with AHP. Then, the Multiple Criteria Decision Making methods TOPSIS and Yager's min-max approach are applied to find and rank the crisp performance values. In a second step, an aggregation of performance criteria with OWA and Compensatory AND operators are looked at instead of the TOPSIS method and min-max approach. Thereby numerical applications are supplied by the four methods and the obtained results are compared.     

大豆杂交种及其亲本籽粒基因差异表达与杂种优势关系

采用4×5 NC II设计,以大豆鼓粒期未成熟籽粒为材料,应用mRNA差异显示技术,分析杂交种及亲本之间基因差异表达模式,并与杂种优势进行相关分析,以期从基因差异表达角度来揭示大豆杂种优势产生的机理。结果表明,杂交种和亲本之间存在明显的基因差异表达,差异表达模式可分为单亲表达一致一型（110型）、单亲表达一致二型（011型）、双亲共沉默型（101型）、单亲表达沉默一型（100型）、单亲表达沉默二型（001型）和杂种特异表达类型（010型）6种。差异表达模式与杂种表现的相关分析中,有11个相关系数达到显著或极显著水平。差异表达模式与中亲优势的相关分析中,株高与110型,分枝数、单株粒数、单株粒重与001型呈显著正相关。差异表达模式与超亲优势相关分析中,株高、节数与110型呈极显著负相关;茎粗与100型呈显著负相关;株高、虫食粒率和011型呈极显著正相关;蛋白质和110型,株高、节数与101型,百粒重与100型呈显著正相关。说明大豆鼓粒期基因差异表达与杂种优势形成有一定的相关性。     

A hybrid SVM and supervised learning approach to fuzzy min‐max hyperbox classifiers

Abstract

In this paper, a fuzzy min‐max hyperbox classifier is designed to solve M‐class classification problems using a hybrid SVM and supervised learning approach. In order to solve a classification problem, a set of training patterns is gathered from a considered classification problem. However, the training set may include several noisy patterns. In order to delete the noisy patterns from the training set, the support vector machine is applied to find the noisy patterns so that the remaining training patterns can describe the behavior of the considered classification system well. Subsequently, a supervised learning method is proposed to generate fuzzy min‐max hyperboxes for the remaining training patterns so that the generated fuzzy min‐max hyperbox classifier has good generalization performance. Finally, the Iris data set is considered to demonstrate the good performance of the proposed approach for solving this classification problem.     

3ds max在雷达功能仿真演示系统中的应用

简单介绍了舰载雷达功能仿真系统制作过程,详细探讨了运用3dsmax制作舰载雷达的搜索、跟踪、制导功能三维动画的方法和主要步骤。基于作战环境实际,运用3dsmax中的DreamScape插件仿真了天空及海水动画效果。阐述了驱逐舰建模的不同方法和技巧,对如何在模型精度与计算速度求得平衡方面进行了探讨。     

基于跳数约束的网络动态路由算法

阐述了网络动态负载平衡和跳数约束条件下寻找最小费用路径的算法,算法中引入了网络中边和点的流量因子的概念,然后利用计算出来的流量因子,定义出每条边的动态费用,这种动态费用包含了网络负载流量的信息.通过综合出来的动态费用,利用一种具有跳数约束计算最小路径的启发式算法,找出最优的可行路径.     

Min–max generalized predictive control with stability

This paper presents a min–max generalized predictive control (MMGPC) which is robust to disturbances and has guaranteed stability. The MMGPC is derived from the min–max problem. It has non-recursive forms which do not use the Riccati equations. Stability conditions of the proposed control law are presented, which can be met by adjustment of some parameters such as input–output weightings. This paper presents a systematic way to obtain appropriate parameters for these stability conditions by using the linear matrix inequality (LMI) method. It is also shown that the suggested control guarantees that induced norm from disturbances to system outputs is bounded by a constant value under the same stability conditions.