Effects of Electrochemical Treatment on the Superficial Properties of Rayon-based Carbon Fibers

The development of surface acidity on rayon-based carbon fibers during mild electrochemical treatment was investigated. Conductimetric titration was the primary method used to investigate the functionalities on the carbon fiber surface. The acidity on the surface of the untreated carbon fiber was very low, while for the treated fibers, the acidity increased significantly. Moreover, with the treatment extent proceeded, the acidity on the fiber surface also increased. SEM analysis shows electrochemical treatment under intense treatment degree caused considerable etch on the fiber surface. Cavities and grooves can be observed on the surface via the SEM microphotograph. While in a more mild treatment, electrochemical treatment didn't cause great etch on the surface of the fiber.     

预则型动态交通网络配流模型

提出卫种预测型动态交通网络配流模型，利用最优控制理论和最优化原理推出了模型最优解存在的条件，并给出最优解的经济解释，体现模型体现了道路使用者对路树的预测依赖于先进的交通信息系统和决策者的理发预测的特点，它与实际情况更为接近。     

The Relationship between the Mechanical Properties of Pure Silk Fabrics and Dress Performance

In this paper, the relationship between mechanical properties of 30 pieces of pure silk fabrics and the dress performance has been analyzed. With the methods of multifactor linear step regression and discrimination analysis, the judgment and prediction model of the performance have been established.     

中高碳钢堆焊技术的应用及研究进展

介绍了近年来堆焊技术在中高碳钢的应用和堆焊焊条的研制进展情况。     

Construction Model of Enterprise Innovation Capacity

This paper sets up the construction model of enterprise innovation capacity by analyzing the personal nature, organization, knowledge and market demand. And this paper demonstrates that enterprise innovation capacity should be based on knowledge grasped by personal and organization in the enterprise. Whether the profit can be brought by innovation is mainly decided by competition advantage from innovation capacity.     

F-117A飞机外形隐身性能的研究

本文简要地介绍了美国隐身战斗机F—117A的有关情况,并模拟了F-117A的外形,制作了模型,经雷达测试后,得出在各姿态角下的雷达散射截面,用突防理论对F—117A进行隐身性能分析。并据此得出了应加强具有隐身性能材料研究的结论。     

智能化人口-经济发展战略决策支持系统CDSS

本文提出将基于人工智能技术、运用知识和推理的专家系统与基于数字仿真技术、运用数据和模型的仿真模型体系相集成的智能化决策支持系统CDSS。CDSS用领域专家的知识选择和组合模型,完成问题的推理和系统的仿真运行。系统支持决策过程的各阶段并通过人-机界面实现定性与定量相结合的交互式决策。其系统结构对解决管理科学中非结构化问题具有普遍适用的价值。     

英汉古典诗格律比较

诗是最凝练、最富有表现力的艺术形式,是语言的精华,诗的格律是由无数诗人的长期创作实践而形成的一套诗创作声律方面的格式和规则。格律的各种要素,使人们在听觉上,视觉上和意念上对诗歌产生综合的美感。平仄及音步的程式能使诗产生抑扬之美,用韵规则可使诗具有回环之美。     

应用BDP光度法测定水中微量阴离子表面活性剂

本文报导了用溴化—1—苄基—4—(4—二乙基氨基苯偶氮)吡啶盐(BDP)光度法测定水中微量阴离子表面活性剂,实验结果,回收率为90.2％—104.8％;标准偏差为O.0193;变异系数为O.64％。     

可逆变流器的OPWM控制

提出一种适用于单片机实现的可逆变流器谐波优化控制方法 .它使变流器可以工作于较低的载波频率而具有近于零的低次谐波 ,因而特别适用于 GTO大功率变流器 .论述了优化开关角的求解方法 ,分析了优化开关角的特点 .仿真结果表明了优化开关角解的正确性