一种再制造物流网络设施定位优化方法

针对包含正向和逆向的再制造物流网络,提出一种由3种设施组成的2层物流设施定位优化方法,并给出0-1整数规划模型.基于遗传算法的全局搜索能力,全面考虑了正向流和逆向流及其它们之间的相互约束处理,避免了传统拉格朗日启发式算法中求上下限的繁琐计算过程.仿真实验表明提出方法的有效性.     

一种逆向物流回收品定价模型

以逆向物流回收系统总利润最大化为目标，考虑再生产过程要求回收品持续不断地供应以及回收品修复率等因素，构建一种单周期单产品回收定价模型，并对模型进行数值分析和算例验证。回收模型总利润与回收品再销售价格及回收周期相关，回收品再销售价格是其修复率的单调递减函数，回收品回收周期是其修复率的单调递增函数，回收品修复率保持在一定范围内对企业有利。     

Coordinating production and recycling decisions with stochastic demand and return

In this paper, the joint production and recycling problem is investigated for a hybrid manufacturing and remanufacturing system where brand-new products are produced in the manufacturing plant and recycled products are remanufactured into as-new products in the remanufacturing facility. Both the brand-new products and remanufactured products are used to satisfy customer demands. Returns of used products that are recycled from customers are assumed to be stochastic and nonlinearly price-dependent. A mathematical model is proposed to maximize the overall profit of the system through simultaneously optimizing the production and recycling decisions, subject to two capacity constraints — the manufacturing capacity and the remanufacturing capacity. Based on Lagrangian relaxation method, subgradient algorithm and heuristic algorithm, a solution approach is developed to solve the problem. A representative example is presented to illustrate the system, and managerial analysis indicates that the uncertainties in demand and return have much influence on the production and recycling policy. In addition, twenty randomly produced examples are solved, and computational results show that the solution approach can obtain very good solutions for all examples in reasonable time.     

二次创新成果的保护研究

以引进、消化、吸收和再创新为背景,探讨了基于反向工程的二次创新的过程和途径,进而分析了二次创新成果的保护,旨在推进发展中国家的自主创新进程。     

高频二极管掺金、掺铂和12MeV电子辐照性能的研究

对高频二极管掺金、掺铂和１２ＭｅＶ电子辐照试验结果进行了对比分析研究．实验研究结果表明：掺金器件有最佳的ＶＦ～ＴＲＲ折衷曲线，但高温特性却最差；掺铂器件有最佳的高温特性，但ＶＦ～ＴＲＲ折衷曲线却最差；全面衡量器件各参数，１２ＭｅＶ电子辐照最有利于器件参数的最佳化．据此，提出了不同类型的高频二极管少子寿命控制技术的优选方案．     

反胶束中水的波谱研究

测定了不同含水量的丁二酸双（２－乙基已基）酯磺酸钠（ＡＯＴ）反胶束溶液的核磁共振谱及红外光谱，以探测水在反胶束中的结构和性质。研究表明，在ＡＯＴ反胶束中，Ｎａ＾＋水化层内的水分子由于强烈的离子－偶极相互作用而被紧紧束缚，使水分子间的氢键缔合大为削弱；当引入更的多水分子的束缚程度大幅度下降，氢键缔合大为增强。但即使在最大的反胶束中，水的流动性仍比普通水低。反胶束中水的这些特殊性质正是反胶束溶液获得广     

逆向工程在鞋楦自由曲面重建中的应用

鞋楦是制鞋工艺中鞋型款式的基准，是制鞋的基础．目前，如何快速建立鞋楦3D自由曲面模型是鞋楦设计制作及鞋底模具制作的重要课题之一．基于此，本文导入逆向工程技术，阐述了其在鞋业中的应用．着重讨论了鞋楦3D自由曲面重建的关键技术，并建立了鞋楦的逆向处理流程，实现了鞋楦3D自由曲面模型的快速重建．对逆向工程技术在鞋业中的具体应用和深化推广有一定的意义．     

基于产品局部特征分析的造型设计方法

探讨了产品局部特征分析的新算法,具有良好的全局重构能力,重视产品的局部特征,为产品局部特征分析提供了更深更广意义的理解,为产品设计反求工程提供一种新的形态重构方法,为产品局部造型深入设计提供依据.     

Parameterization for fitting triangular mesh

In recent years, with the development of 3D data acquisition equipments, the study on reverse engineering has become more and more important. However, the existing methods for parameterization can hardly ensure that the parametric domain is rectangular, and the parametric curve grid is regular. In order to overcome these limitations, we present a novel method for parameterization of triangular meshes in this paper. The basic idea is twofold: first, because the isotherms in the steady temperature do not intersect with each other, and are distributed uniformly, no singularity (fold-over) exists in the parameterization; second, a 3D harmonic equation is solved by the finite element method to obtain the steady temperature field on a 2D triangular mesh surface with four boundaries. Therefore, our proposed method avoids the embarrassment that it is impossible to solve the 2D quasi-harmonic equation on the 2D triangular mesh without the parametric values at mesh vertices. Furthermore, the isotherms on the temperature field are taken as a set of iso-parametric curves on the triangular mesh surface. The other set of iso-parametric curves can be obtained by connecting the points with the same chord-length on the isotherms sequentially. The obtained parametric curve grid is regular, and distributed uniformly, and can map the triangular mesh surface to the unit square domain with boundaries of mesh surface to boundaries of parametric domain, which ensures that the triangular mesh surface or point cloud can be fitted with the NURBS surface.