Monitoring correlative financial data streams by local pattern similarity

Developing tools for monitoring the correlations among thousands of financial data streams in an online fashion can be interesting and useful work. We aimed to find highly correlative financial data streams in local patterns. A novel distance metric function slope duration distance （SDD） is proposed, which is compatible with the characteristics of actual financial data streams. Moreover, a model monitoring correlations among local patterns （MCALP） is presented, which dramatically decreases the computational cost using an algorithm quickly online segmenting and pruning （QONSP） with O（1） time cost at each time tick t, and our proposed new grid structure. Experimental results showed that MCALP provides an improvement of several orders of magnitude in performance relative to traditional naive linear scan techniques and maintains high precision. Furthermore, the model is incremental, parallelizable, and has a quick response time.     

基于灰色关联聚类分析的智慧城市建设领域发展水平实证研究

从智慧城市六个建设领域发展水平角度出发,利用灰色关联分析法得出智慧城市六个建设领域相对发展水平的关联度,在关联度的基础上对各个建设领域进行聚类分析得出三类不同发展水平的建设领域。研究结果有效的揭示我国智慧城市各领域建设存在不平衡性特征。     

鄱阳湖水系COD-Mn变化规律研究

本文对鄱阳湖及五大支流水质监测数据进行统计分析,以图表形式揭示了鄱阳湖及其五大支流CODMn时空变化的规律,总结出了鄱阳湖水系CODMn变化的主要两个特点：①CODMn呈季节性变化;②流经城市地段后,水体CODMn值将升高。通过对CODMn与水质参数的相关性分析,从地表径流、城市生活污水及工业点源、水土流失面源等方面的影响解释了上述特点。     

政府干预与国有企业过度投资相关性研究

随着我国经济的发展,企业过度投资的问题越来越严重,其中不乏企业内部治理结构的原因,但同时还受到政府干预的影响。政府干预对企业的影响难以避免,导致企业资源配置效率不高,并最终阻碍经济增长。     

期刊零被引率与期刊评价指标的相关性研究——以神经病学核心期刊为例

【目的】 探讨神经病学核心期刊零被引率与期刊评价指标的相关性。【方法】 统计19种神经病学核心期刊2012年的零被引率,并与复合影响因子、复合即年指标、引用半衰期、被引半衰期、基金论文比、学科扩散指标、学科影响指标进行相关性分析。【结果】 直线相关分析的结果显示,零被引率与引用半衰期呈正相关,与基金论文比、学科扩散指标呈负相关,而复合影响因子、复合即年指标、复合5年影响因子、复合他引影响因子、被引半衰期、学科影响指标与零被引率无相关性。【结论】 零被引率与引用半衰期、基金论文比、学科扩散指标相关,可通过提高期刊学术质量和影响力、论文的创新性及学术性来降低零被引论文数量。     

专科学生课堂注意状态相关研究

采用问卷的研究范式，对专科学生的课堂学习注意状态与学习效果的相关关系进行测试。结果表明：学生的注意品质随着年龄的增长和知识的积累而不断优化，专科学生的课堂注意状态与教师的学识和教学能力、教学环境、学生的学习心理等综合因素相关。     

The impact of the pre-instructional cognitive profile on learning gain and final exam of physics courses: a case study

The case study described in this paper investigates the relationship among some pre-instructional knowledge, the learning gain and the final physics performance of computing engineering students in the introductory physics course. The results of the entrance engineering test (EET) have been used as a measurement of reading comprehension, logic and mathematics skills and basic physics knowledge of a sample of 47 Computing Engineering freshmen at the University of Palermo (Italy). These data give a significant picture of the initial knowledge status of a student choosing engineering studies. The students' physics learning gain has been calculated using a standardized tool in mechanics: the force concept inventory (FCI). The analysis shows that mathematical and physical background contribute to achieve a good final preparation in physics courses of engineering faculties; however the students' learning gain in physics is independent of students' initial level of mathematics skills and physics knowledge. Initial logic skills and reading comprehension abilities are not significant factors for the learning physics gain and the performance on physics courses.     

云南烤烟评吸质量与化学成分的关系研究

分析云南烤烟总糖、还原糖、总氮、烟碱等化学成分的含量,并对香气质、香气量、浓度、余味等评吸质量进行专家评吸打分。化学成分与评吸质量的相关分析表明,与评吸质量关系密切的化学成分主要为糖组分和含氮化合物。香气质、香气量、评吸总得分与化学成分的逐步回归分析表明,化学成分对香气质作用的大小为:挥发碱>总糖>总氮>总灰分,对香气量作用的大小为:总灰分>总糖,对总体评吸质量的作用大小为:总糖>总氮>总灰分>蛋白质>还原糖>钾。     

In situ hyperspectral data analysis for pigment content estimation of rice leaves

Analyses of the correlation between hyperspectral reflectance and pigment content including chlorophyll-a, chlorophyll-b and carotenoid of leaves in different sites of rice were reported in this paper. The hyperspectral reflectance of late rice during the whole growing season was measured using a Spectroradiometer with spectral range of 350-1050 nm and resolution of 3 nm. The chlorophyll-a, chlorophyll-b and carotenoid contents in rice leaves in rice fields to which different levels of nitrogen were applied were measured. The chlorophyll-a content of upper leaves was well correlated with the spectral variables. However, the correlation between both chlorophyll-b and caroteniod and the spectral variables was far from that of chlorophyll-a. The potential of hyperspectral reflectance measurement for estimating chlorophyll-a of upper leaves was evaluated using univariate correlation and multivariate regression analysis methods with different types of predictors. This study showed that the most suitable estimated model of chlorophyll-a of upper leaves was obtained by using some hyperspectral variables such as SDr, SDb and their integration.     

竞赛打分中趋势偏差的消除

竞赛打分往往存在越打越高的趋势，本提出一种消除这种趋势偏差，使比赛更为公正的方法。