Application of the Constrained Predicated Nets and Interval Logic to Production Systems

1 .INTRODUCTIONDuetotheireconomicsignificanceandclosenesstopersons,productionsystemsmustbemodeledbeforetheirimplementationanduse,thus,amethodwhichspecifies ,analyzesandsynthesizestheproductionsys tems—discreteeventsystems (DES)hasbeenestab lishedanddevelopedstepbystepinrecentyears.DESmethodspecifiestheplantbasedonitsdiscretecharacters,however,intherealworld ,therearefewplantsthatcanbemodeledbypurelydiscretemathe maticalmodelbecausetherearealwayssomecontinu ousparametersforstudyinnearlya…     

半导体激光器行波速率方程的研究

考虑了ＩｎＧａＡｓＰ半导体激光器的俄歇效应后，对描述稳态运行的半导体激光器的行波速率方程组进行了修正，求得了隐函形式的解析解，并以此对激光器的一些重要持性进行了讨论。     

心理治疗还是药物治疗

心理治疗与药物治疗是精神病领域的两种治疗模式。心理治疗模式认为，个体精神状况正常与否主要受情绪、人格等心理因素影响，精神疾病由后天环境和生活经历所致；药物治疗模式则认为，精神病及各类神经症都有其生理基础，大脑机能的缺陷是导致精神疾病的主要原因，因此主张用药物进行治疗。尽管两者在精神病治疗中都有自己的优势与不足，但是在科学一统天下的今天，生物学模式似乎成了治疗的主流。要想最终解决心理治疗与药物治疗之争，科学预测精神病治疗的未来及新世纪心理治疗的命运，必须首先解决：（1）心理学的学科体系问题；（2）精神疾病的界定问题以及（3）心身关系问题。     

Technical Notes ：STUDIES ON THE VALUE OF SECONDARY MARKET TO THE SUPPLY CHAIN

This paper investigates the impact of a secondary market, where retailers can buy and sell excessinventories, on the supply chain. We develop a two-period model with a single manufacturer and tworetailers. At the beginning of the first period the retailers order and receive products from themanufacturer, but at the beginning of the second period, they can trade surplus products betweenthemselves in the secondary market. We investigate the impact of the correlated dependence ofretailers' demand on both the quantity effect and the allocation effect under the secondary market.Lastly,we study potential strategies for the manufacturer to increase sales with the existence of thesecondary market.     

管道纺包芯纱的研究

本文研究了在管道纺纱机上不添加构件而进行包芯纱的纺制。分析了其包芯纱的成纱机理。观察了实际成纱的横截面,证实了棉纤维能够均匀地、完全地包覆在芯丝的周围。也对不同性质的芯丝所纺包芯纱的结构作了观察,并对不同成纱的性质随速度增加而变化的规律作了研究。     

Non-Minimum Phase Nonlinear System Predictive Control Based on Local Recurrent Neural Networks

Abstract: After a recursive multi-step-ahead predictor for nonlinear systems based on local recurrent neural networks isintroduced, an intelligent PID controller is adopted to correct the errors including identified model errors and accumulatederrors produced in the recursive process. Characterized by predictive control, this method can achieve a good controlaccuracy and has good robustness. A simulation study shows that this control algorithm is very effective.     

对先进生产力与先进文化之间关系的结构性解读

为了实现“中华民族的伟大复兴” ,需要理论指导 ,对“什么是先进生产力和什么是先进文化”二者之间的关系及结构进行的解读 ,其目的在于指出要达到的二者动态平衡将是一个艰巨、长期和复杂的过程。     

金属间化合物Ni3Al中的硼晶界偏聚特性的AES研究

本文应用俄歇能谱仪研究了不同化学计量比ＮｉＡｌ金属间化合物硼在晶界偏聚的特性。研究结果表明：硼在Ｎｉ３Ａｌ的各个晶界偏聚存在着不均匀性，硼在晶界的偏聚范围只有几个原子层，晶界结构及晶界化学环境是影响在晶界偏聚的决定因素。