基于CBR的危险品航空运输事故应急决策研究

针对危险品航空运输事故现场信息传递不及时、不全面造成应急决策不当的问题，建立危险品航空运输事故应急决策案例推理模型。以事故现场表面信息构建案例属性；应用G1法对案例属性主观赋权进行案例优选检索，使用熵权法客观赋权结合灰色关联分析进行案例相似度检索。通过实例分析，模型计算得到的最相似案例与目标案例相似度为0.671 28 且二者应急决策方案相似，表明该模型可以为危险品航空运输事故提供应急决策指导。     

Evaluation of carbonated incineration bottom ash using exhaust gas and CO2 discharged from waste incineration facilities as ground material

This study focused on a carbonation treatment that immobilizes trace elements such as lead (Pb) in incineration bottom ash (IBA) using the exhaust gas and the refined carbon dioxide generated (CO₂) recovered at the Japan's first incineration facility, which recovers CO₂ in the gaseous form. This study describes (1) the bearing capacity of IBA from the municipal solid waste (MSW) obtained through the California bearing ratio (CBR) test to investigate the possibility of using IBA as a base course material, (2) mechanical characteristics of IBA using the cone index test, to investigate the possibility of using as an embankment material, and (3) leaching properties of IBA from MSW obtained through a single batch leaching test and the long-term outdoor exposure of the leaching test to evaluate the effect of carbonation treatments. Results reveal that there was no effect of trace components not included in the separated and recovered CO₂, and that the effect of carbonation could be obtained even if the exhaust gas was used directly. The carbonated IBA can be applied as a sub-base course material based on its mechanical properties, regardless of the carbonation conditions. In addition, carbonated IBA can be used as an embankment material owing to its sufficient cone index value. Regarding the heavy metal and metalloid leaching behavior, it was revealed that all the IBA samples satisfied the soil environmental standards set by the Ministry of the Environment, Japan, except for Cr (VI). The long-term leaching characteristics of carbonated IBA showed that Pb could be immobilized over a long period.     

基于CLIPS的发射车诊断系统的设计与实现

以发射车为例,采用基于故障树和基于案例的故障诊断方法,利用CLIPS专家系统开发工具设计专家系统的知识库和推理机,借助C＃编程语言开发人机接口界面以及管理模块等,实现一种高效的故障诊断专家系统。将故障树的结构信息和上下层节点之间的逻辑关系,以及案例知识均以CLIPS的事实语法结构进行保存。系统借助CLIPS开发推理机,实现基于故障树的正反向混合推理,以及基于含有字符串型和枚举型属性的案例的推理,从而提高了故障诊断和推理的准确性与可靠性。     

CBR strength of reinforced soil with natural fibres and considering environmental conditions

This paper investigates the effect of including randomly spaced palm fibres in a soil matrix. The fibres in date palm have special properties such as low costs, plenitude in the region, durability, lightweight, high tension capacity and relative strength against deterioration. Thus, it is possible to use the palm fibres as an alternative low-cost natural material for soil reinforcement. As the objective of this research was to mix the soil and date palm fibres to use in the construction of soil roads, especially village road, we discuss the influence of date palm fibres on CBR (California Bearing Ratio) strength of fine sand. CBR tests were conducted under dry and submerged conditions. The durability of fibres was also investigated using the plain fibres and fibres coated with bitumen. Some samples were soaked for several months before being loaded. The results show that the addition of palm fibres increases the CBR strength of the sand specimens significantly. It is also seen that the sliding strength controls the failure of the specimens rather than the rupture strength.     

船舶铁舾件工时定额估算方法研究

为了解决人工工时估算不准确且费时等问题,准确测算船舶铁舾件舾装作业的工时定额,提出了基于CBR和BP神经网络的铁舾件装配工时定额制定方法.针对铁舾件细分工种安装工艺相似但型号各异的特点,提出基于非数值型和数值型特征参数相结合的相似性规律,在已知部分型号舾装工时情况下,利用相似性检索方法找出与新铁舾件最相似的铁舾件集,根...     

基于PCA和CBR的医学诊断专家系统

将主成份分析与案例推理相结合,构造一个医学诊断专家系统。对RS的数字化转换方法进行改进,提出了基于权重的WRS数值转化方法;并对案例检索中常用的最近邻策略进行了改进,提出了基于最相似匹配原理的最近邻比值检索方法。     

RBR和CBR在数控机床故障诊断专家系统中的应用

文章以数控机床为对象,研究了实例与规则协调工作的故障诊断专家系统.规则、案例在数据库中与数控机床的功能结构结合并分别存储,在推理中混合执行.规则是对实例的归纳总结.克服了规则获取难的缺点,在诊断中规则又指导实例,使得故障快速定位,提高了诊断的效率.同时文章以JSP为开发语言,采用Spring+hibernate+Struts2架构,开发了基于B/S模式的数控机床故障诊断系统,具有较好的诊断功能.     

CBR技术在《模具CAD/CAM》教学中的应用

将CBR技术运用到《模具CAD/CAM》课程教学活动中,采用任务驱动的课堂教学方式,以游戏机手柄上盖为实例,介绍了实例的实施过程,并基于此实例推理学习相关的实例教学过程,结合学院的客观实际情况和教学实践条件,运用CBR技术组织教学活动,课程教学效果好,提高了学生的学习积极性,激发了学生的学习兴趣。     

注塑模设计中基于CBR研究

通过对CBR技术及注塑模设计过程的分析，指出CBR技术可以很好地应用于注塑模CAD系统中，并提出了一个如何将PCR技术应用于注塑模设计的注塑模结构事例表示方法，最后给出了一个基于事例的注塑模设计系统的整体结构。     

纺织纤维改性黏土的力学性能

利用废旧衣物制备了2种纺织纤维改性黏土.通过直接剪切试验、加州承载比(CBR)试验以及特设的环刀贯入试验研究了纺织纤维改性黏土的力学性能.结果表明：由于棉质纤维吸收水分,棉质纤维改性黏土水平向抗剪强度明显低于素土;当化学纤维含量（质量分数）为1.0%时,化学纤维改性黏土水平向抗剪强度较素土显著提高;棉质纤维改性黏土环刀贯入阻力在棉质纤维含量（质量分数）为0.6%时达到峰值,化学纤维改性黏土环刀贯入阻力随化学纤维含量增加呈单边增长趋势;棉质纤维改性黏土比化学纤维改性黏土发生更大的吸水膨胀;伴随纺织纤维的适量植入,改性黏土的CBR值较素土有所提高;为减少吸水膨胀量,需要对改性黏土增强压实.相比于棉质纤维,化学纤维更能改善黏土的力学性能.