多维度数据挖掘中目标相关维度选取方法对比

在数据挖掘过程中需要挑选出与目标维度相关的维度,可以通过相关行业的经验挑选,也可采用相关性方法挑选。文章通过对比2种方法在直投市场客户目标选取中的运用,得出比较结论,并对使用这2种方法同的结果作了对比。     

多维度数据挖掘中目标相关维度选取方法对比

在数据挖掘过程中需要挑选出与目标维度相关的维度,可以通过相关行业的经验挑选,也可采用相关性方法挑选。文章通过对比2种方法在直投市场客户目标选取中的运用,得出比较结论,并对使用这2种方法同的结果作了对比。     

国有企业绩效考核指标体系验证研究

针对国有企业绩效考核体系有效性验证相关内容较少的问题,以ZH公司为例,提出了三种绩效考核体系验证方法,分别是层次分析法、目标值对比法、母公司打分法,从构建判断矩阵、与企业期望目标值对比到母公司年度考核打分,研究从不同项维度验证绩效考核体系优化后的基于平衡维度绩效考核体系有效性的具体方法,丰富国有企业绩效考核体系及管理会计相关研究。三种验证方法的具体结果均一致,初步说明优化后基于平衡维度的绩效考核体系是有效的。     

考虑时间特征的客观AHP判断矩阵构造方法

研究目标:为将面板数据中指标的时间维度纳入客观AHP判断矩阵的构造中,因此对时间相依性客观AHP赋权方法展开研究。研究方法:从时间序列自相关性、指标数值转移余量和随机过程转移概率三个维度构造判断矩阵,对比四种赋权方法的优缺点,通过数值仿真评估四种方法的可行性与实用性,以2012～2020年中国31个省份的数字普惠金融指数再合成为例比较各方法测算结果的异同。研究发现:不同赋权类型下各时期内子系统是否通过一致性检验存在区别,不同赋权类型下样本综合指数的数值大小、涨幅趋势和波动情况既有区别又有相同之处,不同赋权类型下样本综合指数的时空特征不尽相同。研究创新:基于时间维度给出了客观AHP判断矩阵的构造方法。研究价值:在AHP方法中加入了时间维度,使客观AHP评价方法更适用于面板数据。     

“十二五”职业教育国家规划教材中高职英语类教材对比研究

通过对“十二五”职业教育国家规划教材中的若干种高职英语教材的编写理念、结构、内容、形式和编写团队进行对比研究,直观地呈现教材编写者的编写理念和编写方法,并结合自身教学实践提出针对性的建议,为教师如何挑选适合高职学生的英语教材提供有益的参考,从而更好地发挥教材在教学中的作用,服务于教学实践。     

基于利益内涵与维度的银行客户细分研究

文章通过对利益内涵及维度的相关研究进行梳理,提出利益细分是一种合理且有效的方法,运用利益细分能有效地将客户细分为具有显著差异的群体。文章以银行客户为例,对利益细分进行解释。     

企业目标管理的基本问题研究

目标管理是现代企业管理的一种创新。文中通过梳理、评析目标管理思想的内涵和四种常见观点,进而提出了第五种能全面涵盖前四种的综合观点——系统观,并对系统观中的关键要素进行论述。目标管理思想的三个关键维度反映出其创新性和科学性,但由于目标管理存在对象选择性,其成效大小依赖于企业内部的资源要素,因此在实施前应做好评估和管理创新工作。在企业目标管理中,目标设置、目标的实施与控制、目标考核、利益机制构建、反馈等是其主要环节,应特别加以重视。     

关于军训学生军纪认同现状的调查与分析

文章通过问卷和访谈,从实证角度揭示军训学生对军纪要求的认同现状及原因。通过对比军训学生在军训前后学生军纪认同各维度的变化,得出军训后学生"观念与认知、他律与自律、教化与内化"三个维度提高较大,"遵守与执行、忠诚与归属"两个维度提高较小等研究结论。     

转变经济增长方式与城乡人力资源开发

转变经济增长方式有不同的维度:在空间维度上具有相对性,在时间维度上具有动态性,在目标维度上具有偏差性,在内容维度上具有必然性。为了在多维度上赶超发达国家已经转变的经济增长方式,必须依靠人力资源开发来推进自主创新,进而建立创新型国家。开发城乡人力资源的最基本方法是教育,根据潜在的人力资源经不同教育后分别成长为体力型劳动力资源、技能型人力资源与创新型人才资源。这三类不同层次人力资源会通过生产要素、企业、国家创新系统来决定转变经济增长方式的速度与质量。因此,实施全方位城乡人力资源开发战略是转变经济增长方式的根本途径。     

大型工程建设管理目标及任务要素的集成研究

本论文从目标管理的维度,研究大型工程建设管理目标及任务要素的集成,在相关理论分析的基础上,利用集成工具P3E/C软件,实现对大型工程项目质量、投资、进度及各任务要素的集成。     

Towards a better understanding of correlation

Correlation is often used to assess both independence and linearity in two dimensions, but is not well understood in higher dimensions. Here we take a closer look at these uses of correlation in two dimensions and how these assessments might be extended to higher dimensions. Our discussion will focus on the simple case of understanding the nature of correlation for association models for two- and three-way contingency tables, but can also be considered in a more general setting.     

浅析在JX-4全数字摄影测量系统工作站下DEM的生产

JX-4全数字摄影测量系统工作站在进行DEM数据采集时,可以使用三维数据采集法来对DEM数据进行采集,三维数据采集法有多种测量方法,它在进行空间方面的测量和分析时能够更为直观的表现出各项数据。也正是因为采用了三维数据采集法,我们可以通过使用正确的构面、水域处理等采集方法来尽可能的减少在采集数据时可能出现的差、错、漏等问题,能够迅速准确地提高工作效率。     

Separating a mixture of two normals with proportional covariances

We propose a simple affine equivariant clustering method, based on the idea of best linear classification, for samples from a mixture of two multivariate normal distributions with different mean vectors but proportional covariance matrices. To ameliorate the curse of dimensionality, a non-parametric approach to find candidates for a best linear discriminant function is presented. By using simulation studies and a real example, we show that for large samples in high dimensions, the proposed method can be a useful supplement to general-purpose multivariate outlier detection methods.     

Developing a typology of organisational forms of cooperative purchasing

This paper develops a typology for purchasing groups. In the typology, five main forms of cooperative purchasing are distinguished based on seven main dimensions. The forms are positioned in a matrix according to two distinguishing dimensions. These two dimensions are the ‘influence by all members on the group activities’ and the ‘number of different group activities’. Underlying the two-dimensional matrix, there are five other dimensions that do not distinguish all forms from each other, but further detail the forms of cooperative purchasing. The typology can serve as a guideline for purchasing groups when a suitable organisational form needs to be chosen. In a suitable form, the dimensions of a group fit together. For all groups, it is recommended to find this best fit. This is something in which the typology may help. The paper concludes by emphasising the importance of clearly defining and positioning studied forms, because different forms imply different research models and have different advantages, disadvantages, and critical success factors.     

Two schools of risk analysis: A review of past research on project risk

Risk research can be generally categorized into two schools: risk as an objective fact and risk as a subjective construction. Both schools have different risk definitions, epistemological dimensions, and analytical methods, and tend to recommend different policies for managing risks. This study aims to locate the position of past studies on project risk found between the two schools of risk analysis and to help understand their basic assumptions and viewpoints by reviewing articles published during the last 10 years in two project management journals: the International Journal of Project Management and Project Management Journal. There are 171 articles collected from both journals. They are categorized into four groups: project management system, subjective perception, irrational behavior in risk management, and subjective construction. This study describes and discusses the basic assumptions, viewpoints, and tendencies usually held by each group, and it indicates the position of each group found between the two schools. It also develops some discussion on the starting point of both schools of risk analysis and their significance in directing practices of project risk management.     

Validation of an instrument to measure absorptive capacity

Absorptive capacity is an ability firms should develop if they wish to adapt to changes in an increasingly competitive and changing environment and to achieve and sustain competitive advantage. Despite the increase in literature on absorptive capacity, some ambiguity remains in determining the dimensions that shape the construct. Thus, no measurement instrument can be adapted to these dimensions. The aim of this paper is to contribute to the literature on absorptive capacity by using a resource-based view to present an alternative measurement instrument for absorptive capacity. This instrument differentiates between the phases of acquisition, assimilation, transformation and exploitation of knowledge, as well as between the two dimensions of absorptive capacity (potential and realized), to reduce the problem of measuring and identifying the dimensions that shape this important construct. The instrument’s validity and reliability are guaranteed and have been tested using data from 168 Spanish organizations.     

基于神经网络集成的失业预警方法

提出采用神经网络集成技术对中国失业预警系统进行建模,以克服当前失业预警系统建模中存在的小样本、高维度、非线性、噪音数据等难题。采用BP神经网络回归模型对失业率进行预测;基于两种集成技术Bagging与AdaBoost对多个神经网络进行集成,以获得比单个预测模型更好的精度与稳定性;最后基于广东省的社会经济调查数据进行了实证分析,实验结果表明:在对失业率的预测上,Bagging集成方法的预测效果优于Adaboost集成方法,也优于单个最好的神经网络模型。     

The regional variations of entrepreneurial dynamism: a mixed methods study

ABSTRACT

Given that added knowledge and deeper understanding are needed with regard to regional variations in the creation of new firms, this study seeks to answer the following two research questions: What are the variables that explain entrepreneurial dynamism and how may they be apprehended under the four necessary and complementary dimensions of this phenomenon, namely the demand, supply, institutional and spatial dimensions? And how should the nature and interrelatedness of these dimensions and their associated variables influence regional policymakers and other regional stakeholders in their efforts to stimulate entrepreneurship in their region? In order to do so, we used mixed methods to collect and analyze regional data, first doing a regression analysis of quantitative data on 97 small regions in Canada’s province of Québec, followed by a qualitative survey of regional stakeholders on eight matched pairs of regions. A phenomenological qualitative analysis was then effectuated in order to gain a deeper understanding of the research variables’ effects and thus grasp the complex socio-economic reality of entrepreneurial dynamism in a region. The results of the study confirm the importance and interrelatedness of the four dimensions of entrepreneurial dynamism in providing new insights into these questions. Moreover, the findings that results from these quantitative, qualitative and holistic analyses have implications for the policies of regional authorities and for the actions of other regional stakeholders.     

Systemic risk and bank business models

In this paper, we decompose banks' systemic risk into two dimensions: the risk of a bank (“bank tail risk”) and the link of the bank to the system in financial distress (“systemic linkage”). Based on extreme value theory, we estimate a systemic risk measure that can be decomposed into two subcomponents reflecting these dimensions. Empirically, we assess the relationships of bank business models to the two dimensions of systemic risk. The observed differences in these relationships partly explain why micro‐ and macroprudential perspectives sometimes have different implications for banking regulation.