On the extension of the compositional rule of inference

In this article we introduce an extension of Zadeh's compositional rule of inference in terms of the general rule of inference using a triangular norm extended to n arguments. Using this extension, all inferences schemes, crisp as well as fuzzy, based on the compositional rule of inference can be obtained in a uniform way. © 1993 John Wiley & Sons, Inc.     

用傅里叶变换计算单缝衍射的光强分布

现代光学和通讯理论由于引入了傅里叶变换的方法，使计算光学系统和通讯系统的物像的对应关系简洁、清晰。该文用傅氏变换计算长为２ａ、照度为Ａ的均匀缝光源在观察面上的光强分布为Ｉ（ｘ）＝│Ｅ（ｘ）│＾２＝ＡＡ＾２ａ＾２（ｓｉｎ２πｆａ／２πｆａ）此方法也可运用于矩形孔、圆孔等。     

Relationship between mutagenic effects of drinking water and incidence of liver cancer in Fusui County--a prevalent area

Relationship between mutagenic activity of drinking water and incidence of liver cancer was studied in Fusui County with micronucleus technique in the root tips of vicia faba. Results showed there existed substance that caused chromosome aberration in the drinking pond water of Fusui County. Micronucleus effects on the root tips of vicia faba induced by the substance in different kinds of drinking water coincided with the incidence of liver cancer (r = 0.86, P < 0.05). It suggested the existence of these chemical mutants in the water may be one of the important factors that caused high incidence of liver cancer. It provided experimental evidence for the etiological theory of liver cancer caused by the pollution of drinking water.     

宽温环境下磁光盘写入光功率的优化

利用有限单元法研究了环境温度、写入光功率、磁光盘膜面温度分布三者间的关系，在此基础上导出了宽温环境下的最优写入条件，该条件为优化宽温磁光盘读出性能提供了依据。     

Handling multiple objectives with biogeography-based optimization

Biogeography-based optimization (BBO) is a new evolutionary optimization method inspired by biogeography. In this paper, BBO is extended to a multi-objective optimization, and a biogeography-based multi-objective optimization (BBMO) is introduced, which uses the cluster attribute of islands to naturally decompose the problem. The proposed algorithm makes use of nondominated sorting approach to improve the convergence ability effciently. It also combines the crowding distance to guarantee the diversity of Pareto optimal solutions. We compare the BBMO with two representative state-of-the-art evolutionary multi-objective optimization methods, non-dominated sorting genetic algorithm-II (NSGA-II) and archive-based micro genetic algorithm (AMGA) in terms of three metrics. Simulation results indicate that in most cases, the proposed BBMO is able to find much better spread of solutions and converge faster to true Pareto optimal fronts than NSGA-II and AMGA do.     

汽车覆盖件冲压工艺/模具计算机辅助技术的发展现状

系统全面地论述了汽车覆盖件冲压模具数字化技术CAD／CAM／CAPP的发展现状，总结了目前存在的问题，并指出了未来的研究发展方向。     

碳化法制备球霰石碳酸钙微球及形成机理

以CaCl₂-NH₃-CO₂为反应体系,采用分散鼓泡碳化法制备出单分散纯球霰石型碳酸钙微球。用扫描电镜（SEM、FE-SEM）、透射电镜（TEM）、X射线衍射（XRD）等手段对样品进行了表征。考察了反应初始pH、反应终止pH、反应初始温度、二氧化碳气体流速等因素对产物颗粒形貌和粒径的影响,并探讨了球霰石微球的形成机理。实验结果表明,与直接鼓泡碳化法相比,分散鼓泡碳化法形成的二氧化碳气泡数量多、大小均匀,能增大溶液中二氧化碳的过饱和度,有利于制备高纯度的单分散球霰石微球;反应初始温度低、二氧化碳气体流速大,均有利于球霰石的生成。最佳反应条件：反应初始pH为10.0,反应终止pH为7.0,二氧化碳气体流速为1 L/min。     

EXPERIMENTAL TESTING OF DRAW—BEAD RESTRAINING FORCE IN SHEET METAL FORMING

Due to complexities of draw-bead restraining force calculated according to theory and depending on sheet metal forming properties experiment testing system, a simplified method to calculate draw-bead restraining force is put forward by experimental method in cup-shaped drawing process. The experimental results were compared with numerical results and proved agreement. It shows the method is effective.     

板料成形优化技术进展与质量工程研究

板料成形过程的优化研究对于改进模具设计、提高产品质量具有重要意义。综述了板料成形工艺优化的研究现状。考虑到在有约束的设计优化中,最优结果常位于约束边界附近,随机因素的波动易导致产品质量不稳定甚至失效,难以保持产品的可靠性和稳健性。为此,本文应用质量工程学中的6σ理念,提出了基于数值模拟的板料成形6σ稳健设计优化方法。     

隔焰辊道窑碳化硅板的研究

本文主要对隔焰辊道窑碳化硅板的配方选择、热震损伤、抗氧化性能和结构形状进行探讨.