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产业集群与产业竞争力分析 总被引:1,自引:0,他引:1
从产业组织优化和集群特有能力的角度分析产业集群竞争力形成的原因开始,揭示产业集群内部的经济问题。然而,产业集群的竞争优势一般来源于其产品的竞争力,即产品的性价比高、市场适应能力强。产品的市场价格又依据产品成本加上经济利润来确定,为简化启见,用成本代替价格进行分析。 相似文献
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邓朝阳 《闽西职业技术学院学报》2011,13(3):94-96
为了对地方高等院校作科学分类,利用模糊聚类方法,对泉州5所高等院校的办学条件、管理水平,教学改革和教育质量进行调查分析后进行分类。根据模糊等价关系,这种方法能够根据阈值的不同,将学校分成若干个类别,据此作为教育教学评价的依据。 相似文献
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为对棉花区试品种进行聚类分析与综合评价,将参加新疆自治区2008年棉花品种区试(早中熟2组)的11个品种包括早熟性、产量因素和纤维品质共17个数量性状进行因子分析.结果表明:前6个公因子对所考察性状总变异的累计方差贡献率达93.42%,反映了所考察性状绝大部分变异信息.根据各品种在各公因子上的得分值,以各因子对总变异的贡献率为权重,计算各品种的综合得分并排序,列前3名的依次为40428,THK-331,锦科255,它们高产优质,综合表现突出.据各品种在各公因子上的得分将11个供试品种从早熟、产量和品质的差异聚为4大类.第Ⅰ类有THK-331、40428、K-263、锦科255共4个品种,属较高产、中上质类品种;第Ⅱ类含99-6、M2、中49(CK)3个品种,为中高产量、中质类品种;第Ⅲ类有康地3052和99-9两个品种,为中产量、中下质类品种;第Ⅳ含X11006和9816两个品种,属高产、较优质类品种,并指出各类品种的主要产量与品质性状改良目标.综合评价结果与各品种的实际表现基本吻合. 相似文献
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为了满足不同学科在科研过程中提出的新需求,超低温探头越来越受关注,应用也越来越广泛。通过以配有BBO HF宽频超低温探头的Bruker Ascend 700 MHz核磁共振波谱仪为例,介绍了BBO超低温探头在分析测试中的应用。 相似文献
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李敏 《天津市教科院学报》2005,(6):39-41
学校教育的最大功能体现在促进学生个体社会化。当前学校教育中存在诸多个体社会化的异化现象,阻遏着学生发展。要消除这种异化现象,必须树立正确的新理念. 相似文献
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The over-load protective relay is widely used for motor protection. The reliability of the over-load protective relay directly affects the safe running of a motor. The reliability testing and reliability analysis of the over-load protective relay is an important way to improve the reliability of products. In this paper, the reliability test method of the over-load protective relay is studied, and the reliability tests of the typical products are carried out on a reliability tester developed by authors. In terms of the testing results, the reliability analysis is finished. The failure reasons are found and the measures are put forward to improve the reliability of the products. 相似文献
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吴超 《佳木斯教育学院学报》2014,(11):99-100
本论文描述一次教学行为的实验过程和结果——即江西籍学生就有关英语语音的意识和发音水平,以及就提高英语语音教师所提供的帮助。实验包括学生和教师调查问卷、一个学生的调查和研讨、与学生的面谈以帮助学生提高语音发音水平,提高沟通交际的能力提出建议。 相似文献
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为了分析交通流的速度不均匀性,提出了一种将聚类分析和概率分布函数拟合相结合的新方法.首先,为了确定最优的子类数,采用两步聚类法对实际的速度数据进行聚类分析,分析表明将速度数据分为2类最能反映交通流的固有类型.然后,将此信息用于指导概率分布函数拟合,采用正态分布、偏正态分布和偏-T分布函数分别拟合各子类数据的概率分布,发现偏-T分布函数拟合精度最高,偏正态分布次之,正态分布最差.模型分析结果表明,所提出的混合分布模型比传统单个分布模型具有更好的拟合能力和通用性.此外,新方法在数据拟合方面更加灵活,且能提供更精确的速度分布模型曲线. 相似文献
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Pavlo D. Antonenko Serkan Toy Dale S. Niederhauser 《Educational technology research and development : ETR & D》2012,60(3):383-398
Cluster analysis is a group of statistical methods that has great potential for analyzing the vast amounts of web server-log data to understand student learning from hyperlinked information resources. In this methodological paper we provide an introduction to cluster analysis for educational technology researchers and illustrate its use through two examples of mining click-stream server-log data that reflects student use of online learning environments. Cluster analysis can be used to help researchers develop profiles that are grounded in learner activity??like sequence for accessing tasks and information, or time spent engaged in a given activity or examining resources??during a learning session. The examples in this paper illustrate the use of a hierarchical clustering method (Ward??s clustering) and a non-hierarchical clustering method (k-Means clustering) to analyze characteristics of learning behavior while learners engage in a problem-solving activity in an online learning environment. A discussion of advantages and limitations of using cluster analysis as a data mining technique in educational technology research concludes the article. 相似文献
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介绍一种利用数据挖掘技术建立顾客分类分析的挖掘模型。主要介绍了基于Microsoft SQL SERVER Analysis Services(SSAS)的聚类分析算法,以及SSAS聚类分析算法在对某销售信息进行顾客分组分析中的应用,通过分析聚类分析算法挖掘模型所发现的模式,得出了对顾客分类的结果,为销售公司管理层的营销决策提供有力的参考和辅助。 相似文献
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李萌 《佳木斯教育学院学报》2013,(11)
本文以多位一线教师的教学情况为样本对高校教学中的各项指标进行了具体的聚类分析并对分析的结果进行了相关的具体分类。在这个研究过程中,得出了教师们各项教学指标的差距,从而为今后的高校教师从哪些方面进行提升和努力提供了一定程度上的依据。 相似文献
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In this study, a large sample with a clustered data structure from an educational context was utilized to analyze the relationship between cognitive abilities, school type, gender, and divergent thinking. The sample comprised 1098 students in 55 classrooms. A sequence of nested multilevel regression analyses revealed that processing capacity, as a core component of intelligence, as well as processing speed shared a significant amount of variance with divergent thinking. Additionally, school type affected divergent thinking even when controlling for intellectual abilities. Furthermore, a significant gender difference in divergent thinking favouring females was found. Gender differences as well as the effect of processing capacity and processing speed varied across classrooms, reflecting differences in the classroom environment. The nature of the relationships of cognitive and social factors to divergent thinking was considered. 相似文献
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傅再育 《福建工程学院学报》2006,4(5):499-503
企业盈利能力评价指标包含会计利润指标和现金流量指标2大类。文章详细分析了会计利润指标的缺陷和现金流量指标的优越性,运用系统聚类的分析方法对常用的评价指标进行分析-并指出评价指标在2大类型上的互补性。 相似文献
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聚类分析和逐步回归法在车道流量预测中的综合应用 总被引:4,自引:0,他引:4
针对目前国内外大中城市中普遍存在的无检测器信号交叉口车道交通流信息难于获取的情况,基于信号控制交叉口车道之间的相关性,综合应用聚类分析和逐步回归法预测单点无检测器信号控制交叉口车道流量.首先应用聚类分析将单点无检测器信号控制交叉口的车道与有检测器信号控制交叉口的车道交通流量进行聚类,然后在聚类分析结果的基础上随机选取车道交通流量样本运用逐步回归法预测单点无检测器信号控制交叉口的车道流量,此方法经过南京市的具体车道流量数据验证.此类问题的解决,可广泛应用于城市交通流诱导系统以及交通控制系统. 相似文献
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Richard L. Sparks Jon Patton Leonore Ganschow 《Learning and individual differences》2012,22(4):463-472
This retrospective study examined L1 achievement, intelligence, L2 aptitude, and L2 proficiency profiles of 208 students completing two years of high school L2 courses. A cluster analysis was performed to determine whether distinct cognitive and achievement profiles of more and less successful L2 learners would emerge. The results of nonhierarchical (k — means clustering) revealed three distinct cognitive and achievement profiles. Participants in the high-achieving cluster scored above average range generally on all L1 and L2 measures; students in the average-achieving cluster scored average range generally on all L1 and L2 measures; and those in the low-achieving cluster scored low to below average range generally on all measures except IQ. Findings suggest that students' level of achievement in L1 skills developed prior to L2 exposure is strongly related to and consistent with their L2 aptitude and proficiency, level of attainment in L2 is moderated by level of attainment in L1, and L2 learning runs along a continuum of learners with stronger to weaker language skills. 相似文献