基于聚类分析和灰度值匹配的碎片文件拼接复原

针对同一页印刷文字文件的碎纸机破碎纸片的拼接问题,研究了碎纸片内文字行特征,碎纸片的边缘像素灰度特征,提出了基于聚类分析和灰度值匹配的碎片文件拼接算法。通过matlab仿真实验,结果表明该算法可靠地实现了破碎文件的拼接,效果良好。     

Dynamic decision-making for reliability and maintenance analysis of manufacturing systems based on failure effects

A framework for reliability and maintenance analysis of job shop manufacturing systems is proposed in this paper. An efficient preventive maintenance (PM) policy in terms of failure effects analysis (FEA) is proposed. Subsequently, reliability evaluation and component importance measure based on FEA are performed under the PM policy. A job shop manufacturing system is applied to validate the reliability evaluation and dynamic maintenance policy. Obtained results are compared with existed methods and the effectiveness is validated. Some vague understandings for issues such as network modelling, vulnerabilities identification, the evaluation criteria of repairable systems, as well as PM policy during manufacturing system reliability analysis are elaborated. This framework can help for reliability optimisation and rational maintenance resources allocation of job shop manufacturing systems.     

贵州省水城县顺场中学滑坡治理工程多排抗滑桩运用与受力分析

贵州省水城县顺场中学滑坡于2007年列为中央财政补助的特大型地质灾害治理项目,文章通过对滑坡治理工程中多排抗滑桩运用和受力进行分析、计算,为水城县顺场中学滑坡治理工程提出合理有效的方案奠定基础,同时也为类似工程提供参考。     

A new decomposition and interpretation of Hicks-Moorsteen productivity index for analysis of Stock Exchange companies: Case study on pharmaceutical industry

This paper deals with the productivity index based on Hicks-Moorsteen (HM) productivity index for analysis of Stock Exchange firms. In this paper, a decomposition of Hicks-Moorsteen productivity index is provided that uses data envelopment analysis (DEA) models. On the other hand, it is offered a new interpretation and decomposition for components of HM productivity index that in previous studies were not performed any interpretation of it. These components have named the output production and the input consumption in terms of changing the efficiency frontier. In addition, by comparing the components of HM productivity index and productivity value, the optimal values of output production and input consumption are determined. Also, the analysis is determined how to identify the optimal value of a firm over a period of time. The proposed approach is applied to 26 pharmaceutical manufacturers that are from Tehran Stock Exchange. Data have been collected for six consecutive years (2009–2014) and have been considered financial ratios for evaluating companies. The results show that the Hicks-Moorsteen productivity index is more able to provide managerial aspects than other productivity indexes such as the Malmquist productivity index.