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121.
裴秀娟 《河北理工大学学报(社会科学版)》2003,3(Z1):121-122
研究了基础釉的成分、蓄光粉的加入量、釉层厚度和烧成温度制度等因素对蓄光陶瓷发光性能的影响以及各种制品最佳工艺技术路线的确定. 相似文献
122.
123.
Douglas G. Bonett 《Journal of applied statistics》2005,32(10):1089-1094
The residual standard deviation of a general linear model provides information about predictive accuracy that is not revealed by the multiple correlation or regression coefficients. The classic confidence interval for a residual standard deviation is hypersensitive to minor violations of the normality assumption and its robustness does not improve with increasing sample size. An approximate confidence interval for the residual standard deviation is proposed and shown to be robust to moderate violations of the normality assumption with robustness to extreme non-normality that improves with increasing sample size. 相似文献
124.
Projecting losses associated with hurricanes is a complex and difficult undertaking that is wrought with uncertainties. Hurricane Charley, which struck southwest Florida on August 13, 2004, illustrates the uncertainty of forecasting damages from these storms. Due to shifts in the track and the rapid intensification of the storm, real-time estimates grew from 2 to 3 billion dollars in losses late on August 12 to a peak of 50 billion dollars for a brief time as the storm appeared to be headed for the Tampa Bay area. The storm hit the resort areas of Charlotte Harbor near Punta Gorda and then went on to Orlando in the central part of the state, with early poststorm estimates converging on a damage estimate in the 28 to 31 billion dollars range. Comparable damage to central Florida had not been seen since Hurricane Donna in 1960. The Florida Commission on Hurricane Loss Projection Methodology (FCHLPM) has recognized the role of computer models in projecting losses from hurricanes. The FCHLPM established a professional team to perform onsite (confidential) audits of computer models developed by several different companies in the United States that seek to have their models approved for use in insurance rate filings in Florida. The team's members represent the fields of actuarial science, computer science, meteorology, statistics, and wind and structural engineering. An important part of the auditing process requires uncertainty and sensitivity analyses to be performed with the applicant's proprietary model. To influence future such analyses, an uncertainty and sensitivity analysis has been completed for loss projections arising from use of a Holland B parameter hurricane wind field model. Uncertainty analysis quantifies the expected percentage reduction in the uncertainty of wind speed and loss that is attributable to each of the input variables. 相似文献
125.
李同辉 《华北电力大学学报(社会科学版)》2005,(1):74-76
<中华人民共和国刑法>对溯及力问题作了从旧兼从轻的原则性规定,这是我国刑法向科学化、民主化方向发展的重要表现,然而刑法在其动态运行中又产生了中间时法的问题.本文通过对中间时法的产生及其机理的分析,并结合中间时法在我国实践中的作用,探讨了刑法对中间时法效力亟待完善的问题. 相似文献
126.
We focus our attention on the classification of fuzzy time trajectories with triangular membership function, described by
a given set of individuals. To this purpose, we adopt a fullyinformational approach, explicitly recognizing the informational nature shared by the ingredients of the classification procedure: the
observed data (Empirical Information) and the classification model (Theoretical Information). In particular, by supposing that the informational paradigm has a fuzzy nature, we suggest three fuzzy clustering models
allowing the classification of the triangular fuzzy time trajectories, based on the analysis of the cross sectional and/or
longitudinal characteristics of their components (centers and spreads). Two applicative examples are illustrated. 相似文献
127.
胡亚云 《河南科技大学学报(社会科学版)》2002,20(2):60-62,68
分析和研究政治语言的系统结构及结构要素之间的相互关系 ,是研究政治语言的重要内容 ,有利于更好地认识和把握政治语言。政治语言结构是一种特殊的层级系统 ,其要素包括符号、符号系统、符码、文本、语境和话语。政治语言结构的要素之间相互作用、相互关联 ,共同构成了政治语言的系统 ,并以其特有的方式表达政治意义 ,服务于政治活动 相似文献
128.
抗战前重庆近代报业情况研究 --以《商务日报》为例 总被引:1,自引:0,他引:1
王立新 《重庆交通学院学报(社会科学版)》2005,5(4):96-98
20世纪初,随着资产阶级革命运动的兴起,国内报刊活动空前活跃.重庆近代报业也伴随时代风潮产生、发展起来.作为新兴媒介,同这一特殊历史时期的国家一样,经历了种种风云变幻、艰难屈辱,却最终顽强坚韧地壮大起来.以重庆当时土生土长、在本地刊行时间最长的<商务日报>为样本,分析研究近代重庆地方报业的发展情况及特点. 相似文献
129.
风险资本的退出是风险投资运作的最后一个环节,风险投资的成败在很大程度上取决于风险投资家能否成功地退出投资。文章在参考国内外有关文献的基础上,对风险投资退出方式、退出时机、退出程度,以及退出决策进行较为系统的评述,以期促进我国风险投资业的发展。 相似文献
130.
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