排序方式: 共有17条查询结果,搜索用时 15 毫秒
11.
12.
13.
知识处理的发展对“否定知识”的认识提出了新的要求。中介逻辑是一个完全形式化的系统,其完整地反映了矛盾和对立等否定关系以及推理关系。文章针对模糊知识,在中介逻辑无穷值语义模型的基础上,研究了基于中介逻辑的近似推理问题。文章分析了模糊知识中的否定关系,并以中介逻辑及其无穷值语义模型给予其语形与语义描述。然后,扩展了近似推理的CRI算法。同时,给出了语义匹配度的度量,包括语义距离和相似度,进而提出了基于语义匹配度度量的近似推理方法。 相似文献
14.
介绍了澳大利亚SSI公司开发的三维可视化矿山工程软件Surpac的主要模块和功能特点,并将Surpac Vision与普通GIS软件相对比,分析了Surpac Vision软件功能的专业性和针对性。在此基础上,结合金属矿山开采的主要步骤,综合论证了这套软件系统在我国金属矿山数字化建设中的推广应用前景。 相似文献
15.
冲模制造中,直徑4毫米以下小孔孔距的精度和孔壁的光洁度,是一个技术关鍵。如果加工质量不稳定,将影响模具使用寿命。为此,上海上联电器厂自行制造了座标钻床和小孔磨床两种专用設备,并且配套使用,已基本上解决了这个难題。目前小孔孔距精度能控制在0.015~0.02毫米之間,孔壁光洁度保持在▽▽▽8以上。 相似文献
16.
17.
The properties of lubricant filters in diesel engines directly affect operation of the lubricant system,and lubricant filters are apt to be impacted by many factors. Therefore, scientific and sensible methods evaluating the properties for lubricant filter diesel engines are necessary to monitor filter properties on line and dynamically. This paper applies ferrographic techniques and adopts sampling methods that oil specimens are synchronously obtained in front of and behind filter elements to monitor the filters of ISUZU DA -220 diesel engine in two FD50 forklifts. Results show that the combination of ferrographic techniques and above sampling methods is effective in analyzing the whole operating process of filters used in diesel engines. The service life and ruined type of filter can be estimated through the relationship between ferrographic readings in front and behind of filter and operation time. Furthermore, through a great deal of tests, a series of experimental curves of readings and time and characteristic parameters for filters used in different machines can be gained, which has guiding significance to the selection and maintenance of the filters. But because of the limitation of the ferrographic technique, the debris on the substrate prevents determination of sizes. It is difficult to judge accurately the size of debris that a filter can filter. 相似文献