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基于系统聚类的环境质量对城镇居民医疗支出的影响分析
Influence Analysis of Environmental Quality on Health Expenditure of Urban Residents Based on Hierarchical Cluster
 [PDF]

唐振,
Statistics and Applications (SA) , 2014, DOI: 10.12677/SA.2014.32011
Abstract:

环境质量对城镇居民医疗支出有着重要影响。本文基于2003~2011年全国31个省市自治区的统计数据,选取人均医疗支出、人均收入、废气排量、固体垃圾作为研究变量,利用系统聚类分析原理,对各地区进行分类,分别建模,进而分析影响不同地区城镇居民医疗支出的主要因素,探讨环境污染与医疗支出的数量关系。实证结果表明:居民医疗支出会因地区不同而变化,人均收入高的地区医疗支出也相应较高,并且人均医疗支出与废气排量呈正相关关系,规范、及时处理固体垃圾会使医疗支出相应减少。
The environmental quality has a vital influence on the health expenditure of urban residents. Based on statistical data of 31 provinces in China from 2003 to 2011, in which the per capita health expenditure, per capita income, exhaust emissions and solid waste are selected as study variables, the main factors affecting health expenditure of urban residents in different areas are analyzed and the economical relationship between environmental pollution and health expenditures is explored using cluster analysis method and modeling process. The empirical results show that: health expenditure of residents varies from region to region, and the region with higher per capita income has a higher health expenditure. At the same time, per capita health expenditure and exhaust emissions have a positive correlation and standardized and timely treatment of solid waste will reduce health expenditure.

基于混合时间序列模型的云南省能源消费预测研究
Energy Consumption Prediction in Yunnan Province Based on Mixed Time Series Model
 [PDF]

尹潇潇,
Statistics and Applications (SA) , 2014, DOI: 10.12677/SA.2014.34025
Abstract:
能源是人类生存、经济发展和社会进步的重要物质保障。本文结合云南省能源消费总量的历史数据,首先建立趋势外推模型,预测云南省未来能源消费总量;然后将趋势外推模型和ARIMA模型相结合,利用混合时间序列模型进行预测和分析;通过比较上述预测结果,发现混合时间序列模型具有更好的预测效果,说明该模型对云南省能源消费总量的预测有重要的理论与现实意义。
Energy is an important material security for human survival, economic development and social progress. Based on the historical data of energy consumption in Yunnan Province, we first estab- lish a trend extrapolation model to estimate the total energy consumption of Yunan Province in the future. Second, we combine the trend extrapolation model and ARIMA model to give a mixed time series model. The prediction results of these two models are analysed and compared. The results show that the mixed time series model is performed better. This indicates that the mixed time series model is a useful theoretical tool for energy prediction in Yunnan Province.
我国城镇化发展与环境污染的关系研究—基于31个省市Panel Data变系数模型与VAR模型的实证分析
Analysis of the Relationship between Chinese Urbanization and Environmental Pollution —An Empirical Study Based on Panel Data Model with Variable Coefficients and VAR Model of 31 Provinces and Cities
 [PDF]

赵吉, 兰海强,
Statistics and Applications (SA) , 2014, DOI: 10.12677/SA.2014.33016
Abstract:
“积极稳妥地推进城镇化”自纳入“十五”规划以来,已成为我国一项基本发展战略。而随着生活水平的日益提高,人们对环境问题也越来越关注。因此,研究城镇化发展与环境污染的关系有重要意义。本文首先利用环境类指标构造环境污染指数,并对历年城镇化率的统计口径进行了修正,然后用描述性统计方法对我国城镇化发展与环境污染的关系进行了特征研究,最后利用Panel Data变系数模型和VAR模型从静态和动态角度对城镇化发展与环境污染的关系进行了深入探讨。研究结果表明,我国大多数省市处于倒U型曲线的左半段,即城镇化的发展带来了一定的环境污染问题。然而对于少数省市(如北京、上海和天津等),城镇化发展会改善环境状况。针对这些结论,提出了相应的对策建议。
Since the 10th Five-Year Plan of China, “actively yet prudently moving forward with urbanization” has been a fundamental development strategy in our country. With rising living standards, people increasingly concern about environmental issues. Therefore, it is quite meaningful to study the relationship between urbanization and environmental pollution. First of all, we use environmental indicators to structure environmental pollution index and conduct a statistical correction on the urbanization rate over the years. Then, features of the relationship between Chinese urbanization and environmental pollution are studied by descriptive statistics. Finally, by using varied coefficients Panel Data model and VAR model, we deeply discuss the relationship between the de-velopment of urbanization and environmental pollution from the perspective of both static and dynamic. The result shows that, the majority of our provinces in the left sections of the inverted U shaped curve, namely the development of urbanization has brought some environmental problems. While for few provinces (such as Beijing, Shanghai and Tianjin etc.), urbanization will improve the environment. According to these conclusions, the paper puts forward the corresponding development suggestions.

基于时间加权历史模拟法的VaR来构建最优投资组合
Constructing the Optimal Portfolio Based on VaR of Time-Weighted History Simulation Method
 [PDF]

李兴奇, 王汉权,
Statistics and Applications (SA) , 2014, DOI: 10.12677/SA.2014.33015
Abstract:
假设收益率服从正态分布时,均值–方差模型常被用于构建最优投资组合。但很多情况下,收益率并不服从正态分布。本文首先构造股票投资价值的衡量指标,根据指标对股票的优劣进行排序;然后利用时间加权历史模拟法来计算投资组合的VaR,建立相应的均值-VaR模型;最后利用均值-VaR模型构建中国股票市场的最优投资组合,预测最优投资组合的风险。此方法可有效避免收益率服从正态分布的假定。
On the assumption that yields obey the normal distribution, mean-variance model is frequently used in the optimal portfolio; but in many cases, yields don’t obey the normal distribution. Firstly, we construct a measure index of stock investment value and sort the merits of stock by the index. Then the VaR of portfolio is calculated by using the time-weighted history simulation method and Mean-VaR model is built accordingly. Finally, the optimal portfolio of Chinese stock market is con-structed by using the Mean-VaR model, and the risk of optimal portfolio is predicted. The assump-tion of normal distribution can be avoided effectively by using this method.
"教育民营"的理念与制度创新设计
吴华 ,
浙江大学学报(人文社会科学版) , 2002,
Abstract: ?"教育民营"是指由非政府组织或公民个人对学校及其他教育机构进行经营管理的教育制度."教育民营"是社会主义民主的内在要求,它增进了教育公平和效益.在"教育民营"制度中,政府退出教育活动的微观管理领域,其职能在于维护和创设良好的制度环境."教育凭证制度"和"开放一切(除军事等特殊领域的教育外)教育服务领域"是"教育民营"制度架构中两个重要的组成部分."教育民营"既是世界教育发展的重要趋势,也是解决中国教育问题的有效途径.
磁化水对小鼠的生理生化效应
,孙奎
动物学杂志 , 1985,
Abstract:
基于WebofScience草地退化研究态势计量分析
,任永宽,友民
草业科学 , 2013,
Abstract: ?为了深入了解全球草地退化研究进展,为相关领域的研究提供参考,本研究基于WebofScience数据源,利用WebofScience数据库所带的分析工具和Excel软件,对1992-2011年草地退化文献进行计量分析。结果表明,近20年国际草地退化研究年发文量呈指数增长;中国自2006年以来,对草地退化的研究增速显著,与世界同期增长水平相当;中国发文量和累计被引频次位居世界第2,但论文质量整体水平低于美国等发达国家;中国科学院在该领域的研究处于国内领先水平,值得同行关注;收录论文质量较高的3种期刊分别是英国的《JournalofAridEnvironments》、美国的《GlobalChangeBiology》和荷兰的《Geoderma》;研究热点涉及到退化草地植被生物量、土壤理化性质、空间格局变化,退化草地的恢复治理和保护等方面。
基于协整理论和VAR模型的城市群内部经济关系研究——以滇中城市群为例
The Study for Internal Economic Relationship of the Urban Agglomeration Based on Cointegration Theory and VAR Model——Illustrated by Central Yunnan Province as an Example
 [PDF]

兰海强, 孟彦菊, , 刘继旺
Statistics and Applications (SA) , 2013, DOI: 10.12677/SA.2013.24013
Abstract:
“积极稳妥地推进城镇化”自纳入我国“十五”规划以来,已成为国家一项基本发展战略。因此,准确地刻画城市群内部经济关系,明确城市群发展状态,对我国各个城市群的发展和城镇化建设意义重大。本文引入了协整理论和VAR模型对城市群内部经济关系进行了深入研究,并以滇中城市群为例进行了实证分析,验证了该方法在研究城市群内部经济关系以明确城市群发展状态中的实用性和有效性,探究了滇中城市群内部的经济关系。研究结果和方法对我国目前已经以及正在形成的城市群内部经济关系的研究具有较好的借鉴作用。
Since the 10th Five-Year Plan of China, “actively and steadily promoting urbanization” has been a fundamental development strategy in our country. Therefore, it is very important for the development of every urban agglomeration and our national urbanization construction to study the internal economic relationship of the urban agglomeration and further clarify the state of development of the urban agglomeration. This paper introduces the theory of cointegration and VAR model and we use urban agglomeration in central Yunnan as an example for empirical analysis. The usefulness and effectiveness of the proposed methods are illustrated using an example of the urban agglomeration in central Yunnan. And this paper deeply analyses the internal economic relationship of the urban agglomeration in central Yunnan. The conclusion is drawn by analyzing the results. We found that the proposed methods are applicable for our country to study the internal economic relationship and accurately reflect the overall state of development of urban agglomerations in China.
生物反应器中杂交瘤细胞的物理破损
,
华东理工大学学报 , 1996,
Abstract: 结合高速搅拌转瓶试验和鼓泡柱试验,考察了生物的反应器中流体主体湍流切和气地杂交瘤细胞的破损作用。实验发现在没有气泡的情况下,只有当Kolmogorov湍流涡旋尺度五细胞大小相当或小于细胞时,生物反应器中流体主体湍流剪切才能导致细胞破损。
由脊髓灰白質炎病人糞便分离出一株科赛奇病毒(Coxsackie virus)
,林毓纯,王蘅
微生物学报 , 1956,
Abstract:
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