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基于网格聚类的案例检索策略 被引量:13
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作者 贾世杰 黄青松 马世霞 《计算机工程》 CAS CSCD 北大核心 2009年第10期170-172,共3页
基于案例推理的智能推荐系统是大型科学仪器协作共用网的重要组成部分。通过对案例库按网格进行聚类,设计并实现一个基于异构案例库的检索策略。分析案例库网格划分原则及案例聚类规则,论述案例聚类算法及在聚类基础上的案例检索策略。... 基于案例推理的智能推荐系统是大型科学仪器协作共用网的重要组成部分。通过对案例库按网格进行聚类,设计并实现一个基于异构案例库的检索策略。分析案例库网格划分原则及案例聚类规则,论述案例聚类算法及在聚类基础上的案例检索策略。实验结果表明,该方法能够有效地降低案例检索时间,提高案例库的可维护性。 展开更多
关键词 基于案例推理 网格 相似度 样本案例
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基于小样本案例的自然灾害风险评估——信息扩散概率模型 被引量:13
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作者 张韧 徐志升 +1 位作者 申双和 陈海山 《系统科学与数学》 CSCD 北大核心 2013年第4期445-456,共12页
针对自然灾害(特别是强灾害事件)破坏性大、发生概率小、信息难以获取等制约灾害评估和风险分析的困难,基于信息扩散思想和实际可用小样本案例,提出了一种更具普遍意义的非均匀信息扩散方法,发展了"概率式"信息扩散评估模型.... 针对自然灾害(特别是强灾害事件)破坏性大、发生概率小、信息难以获取等制约灾害评估和风险分析的困难,基于信息扩散思想和实际可用小样本案例,提出了一种更具普遍意义的非均匀信息扩散方法,发展了"概率式"信息扩散评估模型.基于该方法对模拟海盗袭击事件的海洋环境风险进行了评估实验.结果表明,该方法可从有限的小样本案例中客观拟合出数据信息的扩散函数,进而实现有限样本数据信息的合理拓展,为自然灾害风险评估中广泛存在的信息不完备问题和困难,探索了一条新的解决方法和技术途径. 展开更多
关键词 样本案例 信息扩散 概率模型 风险评估
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隐藏式折叠垂直分隔构件在大型商业综合体中的应用研究 被引量:1
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作者 王登 倪晓波 +2 位作者 李翠翠 王晖 王川川 《新型工业化》 2022年第7期101-106,共6页
本研究旨在推出新型耐火构件,更好地为人民的正常生产活动和消防人员的救援活动提供安全保障。研究开发了一种隐藏式折叠垂直分隔构件,通过将防火门设计为与分隔墙体相结合的隐藏形式,同时在折叠扇中加入中心吊,能够恰当运用在防火分区... 本研究旨在推出新型耐火构件,更好地为人民的正常生产活动和消防人员的救援活动提供安全保障。研究开发了一种隐藏式折叠垂直分隔构件,通过将防火门设计为与分隔墙体相结合的隐藏形式,同时在折叠扇中加入中心吊,能够恰当运用在防火分区场景中。通过进一步实地实验检验设计产品的可靠性与耐用性,最终得到可应用于大型商业综合体中的垂直隐藏式分隔构件。该设计思路以及设计实践过程可以为后续消防器材装备研发提供有效的案例样本。 展开更多
关键词 大型综合体 隐藏式折叠垂直分隔构件 耐火性能 设计实践 案例样本
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Employee Downsizing of the Banking Sector in Portugal: A Case Study
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作者 Franco Gandolfi 《Journal of Modern Accounting and Auditing》 2013年第8期1105-1118,共14页
Downsizing as a systematic reduction of employees is frequently utilized in order to increase productivity, efficiency, profitability, and competitiveness of firms. As a strategy of choice for many firms around the wo... Downsizing as a systematic reduction of employees is frequently utilized in order to increase productivity, efficiency, profitability, and competitiveness of firms. As a strategy of choice for many firms around the world, downsizing produces far-reaching financial, organizational, and social consequences. Despite the large body of literature, there is inconclusive evidence as to whether downsizing is effective and whether it generates the widely anticipated financial benefits. An in-depth review of the literature suggests that most downsized organizations have failed to yield economic benefits. This case study examined whether Portugal's eight largest banks realized their financial objectives upon the execution of downsizing activities during their recent 2008-2010 endeavors. Financial performance was measured through employee efficiency, profitability, and asset quality. Six hypotheses were defined using six different financial ratios which were deemed as integral tools for measuring financial performance of deposit-accepting banks. The secondary data were analyzed within a defined framework of two distinct phases: pre- and post-downsizing phases. A key statistical tool, the paired sample t-test, was applied to determine whether there were statistically significant differences in the ratios between the two timeframes. The analysis demonstrated that there were statistically significant differences between the pre- and post-downsizing ratios of loans per employee and deposits per employee. In contrast, no statistically significant difference was found in return on assets (ROA), return on equity (ROE), loans to assets, and non-performing loans to loans ratios. On the basis of this analysis, the study has concluded that downsized large Portuguese banks have largely failed to achieve their projected financial objectives. 展开更多
关键词 DOWNSIZING financial performance case study PORTUGAL financial crisis
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Innovation in the Manufacturing Sector: The Case of Serbia
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作者 Ljiljana Kontic 《Chinese Business Review》 2011年第10期879-888,共10页
The paper presents the results of research on innovation activities of manufacturing firms in Serbia. In order to answer the question how innovation takes place in one transition country, key influencing factors were ... The paper presents the results of research on innovation activities of manufacturing firms in Serbia. In order to answer the question how innovation takes place in one transition country, key influencing factors were identify (i.e., firm's size, age, ownership, industry sector, personnel qualifications and experience). Based on the analysis of a sample comprising 73 firms, the study tried to highlight certain innovation barriers, which may have a negative impact on the total efficiency of economic performance, and growth and development of manufacturing firms in Serbia. Comparing overall innovation activities of Serbian firms to the other transition countries, it can be concluded that majority of the fhnns had innovation performances below the level EU-27. This study draws out the potential contributions to existing literature of managing innovation in Serbia. 展开更多
关键词 innovation factors innovation networks manufacturing sector STRATEGY Serbia
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基于径向基的时序化敏感特征选择方法研究 被引量:1
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作者 卢志刚 李春生 +1 位作者 胡亚楠 张可佳 《数学的实践与认识》 北大核心 2019年第7期161-169,共9页
在模式挖掘应用于生产智能分析与辅助决策过程中,为提高模式特征选择的准确性和敏感度,设计生产案例样本结构,对特征实体进行逻辑转化;采用时域参数,以时序等粒度函数为基础融合并处理原始数据,降低数据维度,完成数据清洗;选定距离特征... 在模式挖掘应用于生产智能分析与辅助决策过程中,为提高模式特征选择的准确性和敏感度,设计生产案例样本结构,对特征实体进行逻辑转化;采用时域参数,以时序等粒度函数为基础融合并处理原始数据,降低数据维度,完成数据清洗;选定距离特征评估法选择敏感特征,应用径向基函数,引入距离评估因子反应类内聚集程度,描述特征敏感程度,完成时序化敏感特征的选择,达到深度挖掘数据潜在敏感特征,提高数据变化模式表达能力和鲁棒性的目的.最后结合油田聚驱生产施工作业过程,利用方法实现多元复合并发生产异常模式的特征选择过程. 展开更多
关键词 模式挖掘 时域参数 径向基 特征选择 案例样本
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