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1.
乔世华 《渤海大学学报(哲学社会科学版)》2015,(3):7-11
常人所不具有的飞行体验铸就和强化了诗人宁明的敏感善察、内敛理性和达观通透,这些成为其人其作的精神底色,令其诗歌具有独特的美学意义。 相似文献
2.
开设化学设计性实验的探索与实践 总被引:3,自引:0,他引:3
汤琪 《重庆交通学院学报(社会科学版)》2004,4(2):126-128
阐述开设设计性实验的意义,并在实践的基础上,给出了开设化学设计性实验的方案,总结了开设设计性实验的体会。 相似文献
3.
2002~2003年,在会理县彰冠乡和海潮乡,对石榴“麻皮”病进行了化学防治试验,试验结果表明:大生M-45、信生交替使用;春雨一号、达柯宁、阿米西达交替使用防效最好。 相似文献
4.
考虑浓度扩散和扩散流随时间的变化,得到低浓度三分子反应模型的双曲型反应-扩散方程;讨论了方程的稳定性及存在行波解的条件,得到了化学振荡的色散关系和相速度. 相似文献
5.
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
6.
Gini’s nuclear family 总被引:1,自引:0,他引:1
Rolf Aaberge 《Journal of Economic Inequality》2007,5(3):305-322
The purpose of this paper is to justify the use of the Gini coefficient and two close relatives for summarizing the basic
information of inequality in distributions of income. To this end we employ a specific transformation of the Lorenz curve,
the scaled conditional mean curve, rather than the Lorenz curve as the basic formal representation of inequality in distributions
of income. The scaled conditional mean curve is shown to possess several attractive properties as an alternative interpretation
of the information content of the Lorenz curve and furthermore proves to yield essential information on polarization in the
population. The paper also provides asymptotic distribution results for the empirical scaled conditional mean curve and the
related family of empirical measures of inequality.
相似文献
7.
朱清如 《湖南文理学院学报(社会科学版)》2005,30(4):8-11
日军在侵华战争期间,无视国际公约(法),在战场上频频使用化学武器,致使众多中国军民伤亡。大量史事证明,在1943年11月初至12月底的中日常德会战中,由于日本华中派遣军在作战中多次实施毒气(弹)攻击,致使中国第六、第九战区的参战部队伤亡惨重。此战中“日军使用毒气次数之多,为抗战以来所仅见”。 相似文献
8.
Intuitive Toxicology: Expert and Lay Judgments of Chemical Risks 总被引:2,自引:0,他引:2
Human beings have always been intuitive toxicologists, relying on their senses of sight, taste, and smell to detect harmful or unsafe food, water, and air. As we have come to recognize that our senses are not adequate to assess the dangers inherent in exposure to a chemical substance, we have created the sciences of toxicology and risk assessment to perform this function. Yet despite this great effort to overcome the limitations of intuitive toxicology, it has become evident that even our best scientific methods still depend heavily on extrapolations and judgments in order to infer human health risks from animal data. Many observers have acknowledged the inherent subjectivity in the assessment of chemical risks and have indicated a need to examine the subjective or intuitive elements of expert and lay risk judgments. We have begun such an examination by surveying members of the Society of Toxicology and the lay public about basic toxicological concepts, assumptions, and interpretations. Our results demonstrate large differences between toxicologists and laypeople, as well as differences between toxicologists working in industry, academia, and government. In addition, we find that toxicologists are sharply divided in their opinions about the ability to predict a chemical's effect on human health on the basis of animal studies. We argue that these results place the problems of risk communication in a new light. Although the survey identifies misconceptions that experts should clarify for the public, it also suggests that controversies over chemical risks may be fueled as much by limitations of the science of risk assessment and disagreements among experts as by public misconceptions. 相似文献
9.
曾慧娟 《江西农业大学学报(社会科学版)》2002,1(3):52-55
中国加入世贸组织 ,对于长期受到政府高度保护下成长的中国聚酯工业而言 ,无疑将意味着更广和更深层的全球竞争 ,面对严峻的国内和国外形势 ,中国聚酯工业何去何从将是一个需要引起极大关注的问题。特此 ,本文结合经济理论 ,对中国聚酯工业的战略目标和取向问题进行了深刻的剖析和阐述。 相似文献
10.
若定义了标准化学势μ—,其他标准热力学量可从μ—和热力学函数之间的关系通过数学计算得到.本文中,定义了气相中B物质的标准化学势,并根据标准化学势选取了相应的标准态.对方程中有关符号和术语也予了以详细说明 相似文献