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一种贝叶斯网络结构学习的混合随机抽样算法 被引量:6
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作者 胡春玲 胡学钢 吕刚 《计算机工程》 CAS CSCD 2014年第5期238-242,共5页
贝叶斯网络结构学习的随机抽样算法存在收敛速度慢的问题,为此,结合均匀抽样和独立抽样,从初始样本、抽样方式和建议分布3个方面对抽样过程进行改进,提出一种混合型马尔可夫链蒙特卡罗抽样算法(HSMHS)。基于节点之间的互信息生成网络结... 贝叶斯网络结构学习的随机抽样算法存在收敛速度慢的问题,为此,结合均匀抽样和独立抽样,从初始样本、抽样方式和建议分布3个方面对抽样过程进行改进,提出一种混合型马尔可夫链蒙特卡罗抽样算法(HSMHS)。基于节点之间的互信息生成网络结构的初始样本,在迭代抽样阶段,按一定的概率随机选择均匀抽样和独立抽样,并根据当前抽样的样本总体计算独立抽样的建议分布,以改善抽样过程的融合性,加快收敛速度。对算法进行正确性分析,证明其抽样过程收敛于网络结构的后验概率分布,可保持较高的学习精度。在标准数据集上的实验结果表明,HSMHS算法的学习效率和精度均高于同类算法MHS、PopMCMC和Order-MCMC。 展开更多
关键词 贝叶斯网络 结构学习 随机抽样 混合抽样 结构抽样 建议分布
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多种抽样框误差的模型表示
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作者 方匡南 王斌会 《统计与决策》 CSSCI 北大核心 2006年第24期18-20,共3页
我国在抽样理论和方法研究中,对非抽样误差的研究比较少,尤其是对抽样框误差的研究更少。抽样框在抽样调查中起着非常重要的作用,是抽样调查的基础。本文对抽样框几种主要误差及其相互关系作形象直观地高度归纳总结,以便人们对抽样框误... 我国在抽样理论和方法研究中,对非抽样误差的研究比较少,尤其是对抽样框误差的研究更少。抽样框在抽样调查中起着非常重要的作用,是抽样调查的基础。本文对抽样框几种主要误差及其相互关系作形象直观地高度归纳总结,以便人们对抽样框误差有更加深入全面的认识。 展开更多
关键词 抽样结构 抽样框误差 图表模型 代数模型
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美国统计资料的收集方法
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作者 江健桐 王鹤 《统计研究》 1986年第1期77-79,共3页
美国是目前世界上统计资料最丰富的国家之一。各项统计活动的产品构成了一个庞大而纷繁的反映人民、自然资源、社会机构、经济和生态环境等方面的资料和信息实体。 美国统计资料的生成是分散进行的。在政府的各部门中,进行统计活动的机... 美国是目前世界上统计资料最丰富的国家之一。各项统计活动的产品构成了一个庞大而纷繁的反映人民、自然资源、社会机构、经济和生态环境等方面的资料和信息实体。 美国统计资料的生成是分散进行的。在政府的各部门中,进行统计活动的机构或单位超过65个。其中主要的统计机构有商务部的普查局、农业部的统计报告服务局和劳工部的劳工统计局。其他如税务局、矿务局、 展开更多
关键词 普查资料 收集方法 抽样调查 统计资料 行政管理 记录资料 样本 统计活动 商务部 抽样结构
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论几种调查统计方法的结合
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作者 张维华 冯杞靖 《统计研究》 1984年第1期32-39,共8页
搜集统计资料,是整个统计工作中很重要的基础工作。搜集统计资料的方法,特别是引进国外的统计方法应当结合中国的实际,做到洋为中用,而且要把多种调查统计方法结合起来,才能搜集到准确、全面、系统的统计资料,以满足分析研究国民经济和... 搜集统计资料,是整个统计工作中很重要的基础工作。搜集统计资料的方法,特别是引进国外的统计方法应当结合中国的实际,做到洋为中用,而且要把多种调查统计方法结合起来,才能搜集到准确、全面、系统的统计资料,以满足分析研究国民经济和社会发展情况的需要。我们设想以全面统计与抽样调查相结合为基础,把各种调查统计方法结合起来,使之互相配套形成体系,建立起比较完善的调查统计方法制度。本文试图从理论上和实践上论述这个问题。 展开更多
关键词 全面统计报表 抽样调查 典型调查 调查统计 报表统计 重点调查 抽样结构 统计资料 指标体系 统计工作
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Acceleration Factors in the Improvement of Public Welfare Sangiran
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作者 Mugi Raharjo I Gusti Putu Diva Awatara Harmadi Wahyu Agung Setyo 《Chinese Business Review》 2013年第1期24-33,共10页
Efforts to preserve the cultural heritage are manifestation to represent the work of the ancestors of the past so that people can now take advantage of in accordance with destining. There are at least four major aspec... Efforts to preserve the cultural heritage are manifestation to represent the work of the ancestors of the past so that people can now take advantage of in accordance with destining. There are at least four major aspects of a cultural heritage can be appreciated to the public, as art, as an economic resource (for tourism and improve the welfare of the people in the region), as a source of information as knowledge and social fulfillment. This study aims to determine: (1) acceleration factors in the improvement of social welfare Sangiran; and (2) modernization of infrastructure and the role of maximum revenue acceleration in accelerating improvements in public welfare in the Sangiran with the integrated approach of the factors increasing human development, community empowerment, provision of credit banking and employment opportunities. This research is a survey of the Sangiran area using data collection methods of documentation, interviews, and questionnaires. The population in this study is people in the Sangiran region, Central Java. This study uses cluster sampling with sampling. Cluster sampling is a probability sampling extracted by certain groups with similar characteristics. In this study, samples were grouped according to the residence of respondents. The sample used in this study was 500 respondents. The analysis technique used is structural equation modeling (SEM). The results of this study show that: (1) the factors of human development, community empowerment, access to bank credit and employment opportunities to accelerate the improvement of social welfare in the Sangiran area; and (2) the acceleration of the increase in welfare Sangiran region can be achieved by an integrated approach of the factors increasing human development, community empowerment, bank lending and increase employment opportunities through increased infrastructure modernization and maximum income. 展开更多
关键词 human development community empowerment bank credit employment opportunities INFRASTRUCTURE INCOME WELFARE
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四川省中等职业学校专业设置调查与分析 被引量:1
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作者 刘炳震 孙芳芳 《教育与职业》 北大核心 2011年第27期19-21,共3页
中等职业学校的专业设置受区域经济发展水平、学校办学条件和学生专业观等因素影响。文章采用随机取样法调查了四川省公办和民办共75所中职学校的2010年招生专业和招生计划,并对二者在与各产业相关的专业设置情况进行了总体分析和比较分... 中等职业学校的专业设置受区域经济发展水平、学校办学条件和学生专业观等因素影响。文章采用随机取样法调查了四川省公办和民办共75所中职学校的2010年招生专业和招生计划,并对二者在与各产业相关的专业设置情况进行了总体分析和比较分析,探讨了当前四川省中职学校的专业设置与地方产业结构的适应度,并对其未来几年的专业设置问题提出了一些具体建议。 展开更多
关键词 中等职业学校专业设置抽样调查产业结构
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Ancient Festivals in Kiitahya: A Narrative Research
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作者 Nil Duban Ramazan Yildlrim 《Sociology Study》 2016年第9期591-603,共13页
The aim of this research is to analyse the celebration of ancient festivals through narrations. The study is a qualitative research in which narrative research was employed. The study was carried out in Kiitahya. The ... The aim of this research is to analyse the celebration of ancient festivals through narrations. The study is a qualitative research in which narrative research was employed. The study was carried out in Kiitahya. The participants were selected using the snowball sampling technique which is a part of purposeful sampling. In the study, the data were collected through unstructured interviews, which are commonly used in narrative research. According to the results of the analysis, the festivals were examined as three themes: religious festivals, national festivals, and seasonal festivals. Preparations before the religious festivals include cleaning, shopping, and preparing meals. In the morning of the first festival day, fathers go to prayer with their sons. Then they visit cemetery. Women do not join these visits. In festival visits, guests are given socks and handkerchief. Preparations of national festivals begin long before. Streets are decorated with flags which signal the preparations. Celebrations mostly take place in stadiums. Reports showed that the celebrations of Nowruz are rare in Kfitahya. Reports indicated that in Kfitahya, Hldlrellez is much more frequently celebrated in contrast to Nowruz. Painting and clinking eggs are also seen in the celebration of Hldlrellez. 展开更多
关键词 Festival celebrations in Ktitahya religious festivals national festivals seasonal festivals NARRATION TRADITION
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A Empirical Study on Impact Factors of Employee's Knowledge Capital in Supply Chain: Social NetworkPerspective
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作者 Chen Limin Ma Mengli Sun Lixin 《International Journal of Technology Management》 2014年第7期159-162,共4页
In contrast to the previous studies of knowledge capital from the perspective of enterprises, this study discusses the employee knowledge capital formation mechanism in the supply chain using social network method fro... In contrast to the previous studies of knowledge capital from the perspective of enterprises, this study discusses the employee knowledge capital formation mechanism in the supply chain using social network method from the perspective of social capital s~'ucture, taking individual employees as the study objects. 150 effective questionnaires of three groups were returned by multistage cluster sampling, and then they were analyzed through regression and the structural equation model. The results are as follows: (1) the acquisition of social capital and knowledge capital is affected by the network structure position of the employees in the supply chain; (2) the knowledge capital is affected by how much social capital the employees obtained in the supply chain; (3) social capital is an intermediary variable to affect the knowledge capital in the network structure. Finally, related suggestions for the supply chain management and the subsequent studies are proposed. 1 展开更多
关键词 supply chain management social capital social network knowledge capital
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