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1.
The 1998 Korean Survey of Family Income and Expenditures was used to examine the overall consumption and saving behavior of Korean baby boomers and compared the differences in consumption and saving behavior between older and younger boomers. The t -test results indicated that the younger boomers allocated a significantly higher percentage of their expenditures on food away from home, household appliances, transportation and communication than did the older boomers, whereas the older boomers spent higher amounts and allocated larger budget shares on their children's education than did the younger boomers. The results of Ordinary Least-Squares (OLS) regression analysis showed that, holding other factors constant, older boomers not only spent significantly more in the total consumption expenditures and education expenditures, but older boomers also saved significantly less than did younger boomers. 相似文献
2.
利用漫反射法获得环丙沙星短波近红外光谱(700-1100nm),采用化学计量学中的偏最小二乘法(PLS),选取不同的波长范围及不同的光谱预处理方法(一阶导数和和二阶导数)对光谱进行信息提取和分析,对盐酸环丙沙星粉末药品进行了无损非破坏定量分析,以样品中盐酸环丙沙星为活性成分建立了最佳的数学校正模型。讨论了主成分数对PLS模型定量预测能力的影响,并做了比较。 相似文献
3.
试论古汉语中的“鸳鸯”是否是联绵词——兼论联绵词的一种鉴别方式 总被引:2,自引:0,他引:2
廖扬敏 《青岛农业大学学报(社会科学版)》2008,20(3):90-94
在现代汉语中“鸳鸯”是联绵词。通过对“鸳鸯”的历时考察,发现“鸳”、“鸯”能单用、分用,有重叠形式,“鸳鸯”有异序词,也和合成词一样。所以用现行的有关联绵词的语素识别方法一双向替换法不好判断它是否是联绵词。通过考察联绵词的来源,提出了新的判断方法,用两个公式区分联绵词与合成词,最终确定“鸳鸯”从古至今都是联绵词。 相似文献
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A. Baddeley R. Turner J. Møller M. Hazelton 《Journal of the Royal Statistical Society. Series B, Statistical methodology》2005,67(5):617-666
Summary. We define residuals for point process models fitted to spatial point pattern data, and we propose diagnostic plots based on them. The residuals apply to any point process model that has a conditional intensity; the model may exhibit spatial heterogeneity, interpoint interaction and dependence on spatial covariates. Some existing ad hoc methods for model checking (quadrat counts, scan statistic, kernel smoothed intensity and Berman's diagnostic) are recovered as special cases. Diagnostic tools are developed systematically, by using an analogy between our spatial residuals and the usual residuals for (non-spatial) generalized linear models. The conditional intensity λ plays the role of the mean response. This makes it possible to adapt existing knowledge about model validation for generalized linear models to the spatial point process context, giving recommendations for diagnostic plots. A plot of smoothed residuals against spatial location, or against a spatial covariate, is effective in diagnosing spatial trend or co-variate effects. Q – Q -plots of the residuals are effective in diagnosing interpoint interaction. 相似文献
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几类积分微分方程的可积类型 总被引:1,自引:0,他引:1
本文借助求导,迭代等方法,给出几类新的积分微分方程,并给出相应的通积分公式。并举例说明其在实际解题中的应用。 相似文献
8.
本文分析了传统FAGM(1,1)模型建模过程中存在的误差,提出了一种基于Simpson公式改进的FAGM(1,1)模型。首先,基于分数阶累加生成算子和分数阶累减生成算子建立分数阶FAGM(1,1)模型。其次,利用Simpson积分公式对FAGM(1,1)模型的背景值进行改进,建立SFAGM(1,1)模型。进一步,应用遗传算法确定SFAGM(1,1)模型的最优阶数以提高模型的预测精度。最后,以中国人均GDP为例,对比分析GM(1,1)模型、Simpson改进的GM(1,1)模型(SGM(1,1))、FAGM(1,1)模型、SFAGM(1,1)模型的模拟结果,并对"十三五"时期的人均GDP进行预测,其结果表明SFAGM(1,1)模型比GM(1,1)、SGM(1,1)、FAGM(1,1)在人均GDP的预测方面有更高的精度,"十三五"期间人均GDP年平均增长率为10.64%,到2020年达到83146.97元,是2010年人均GDP的2.69倍,以2010年的人均GDP为基准,到2020年将能够实现翻一番的目标。 相似文献
9.
Pure Gold for Broken Bodies: Discursive Techniques Constructing Milk Banking and Peer Milk Sharing in U.S. News 下载免费PDF全文
Technological advances provide increased ability to transfer human tissues—blood, organs, milk—from one body to another. This article analyzes mechanisms of reality construction in U.S. news to construct shared human breast milk. Articles used typifications and human interest stories to convey participants as victims, lay heroes, and villains. Milk banking was portrayed as institutionally integrated through associations, expert testimonies, and formalized procedures, making banked milk “pure gold.” Peer sharing was portrayed as institutionally opposed through institutional warnings, expert testimonies, informal procedures, and hypothetical atrocities, making peer milk “fool's gold.” Findings suggest that “biovalue” of human milk is interconnected with institutional processing. 相似文献
10.
Thank God you're here: the coming generation and their role in future‐proofing Australia from the challenges of population ageing 下载免费PDF全文
Brendan Churchill Lisa Denny Natalie Jackson 《The Australian journal of social issues》2014,49(3):373-392
Like much of the industrialised world, Australia's population is ageing, the implications of which are twofold: increasing demand for publicly funded services and a decline in the supply of prime working‐age people. In grappling with the challenges of a diminishing workforce, the Australian Government is currently relying on its migration programs to provide both the much‐needed labour and skills for the resource boom and also to stimulate the economy through population growth. However, there may be another, not yet fully considered solution to the upcoming demographic problem. This paper investigates how the grandchildren of the baby boomers, termed here the Thank God You're Here generation (Gen TGYH), might impact on Australia's predicted workforce shortage. This generation of workers will enter the labour force as the last of the baby boomers reach retirement age, and will not only be bigger in size than preceding generations (Y, X and Baby Boomers), but also potentially be better educated than the retiring generation. This paper will also canvas the opportunities for both Gen TGYH and employers as well as the challenges for policymakers and governments in maximising the opportunity provided by this generation in the Australian economy. 相似文献