地区差异下居民消费对用水量的影响分析——基于门槛模型的实证研究

基于Hansen非动态面板门槛回归模型,从全国和东部、中部和西部三大区域就居民消费对用水量的门槛效应进行实证分析,结果表明:在居民收入和人力资本的作用下,居民消费对用水量的影响存在显著的门槛效应.全国层面,居民消费对用水量的弹性系数呈现先降后升的变化形态,但增幅降低;区域层面,东部居民消费对用水量的促进作用逐渐降低,西部居民消费促进用水量的增长,中部门槛检验不显著.进一步分析发现:经济发展,特别是城镇化影响门槛值和弹性系数的大小,人力资本作为门槛变量时居民消费对用水量的影响最大.     

工科院校创新人才培养与社会需求差异探讨

当前高校人才培养与社会需求之间存在着一定差异,导致差异的原因是多方面的．高校人才培养模式落后,是高校创新人才培养与社会需求之间存在着差异的根本原因,包括教育观念因素、人才培养过程因素、教育环境因素．     

Effects of parameters in femtosecond laser micromachining on ablation of silicon

A series of ablation experiments on silicon surface by femtosecond laser system of 775 nm and 150 fs duration pulses were carried out.The morphological characteristics and the associated effect in the ablation were tested by atomic force microscope (AFM),scanning electron microscope (SEM),focused ion beam (FIB),and the optic microscope.The single pulse threshold can be obtained directly.For the multiple pulses,the ablation threshold varies with the number of pulses applied to the surface due to the incubation effect.By analyzing the experimental data,the thresholds of laser fluences under various laser pulse numbers were obtained,and the relationships between ablation area and laser energy and laser pulse number were concluded.Meanwhile,the periodic ripple structure on silicon surface was found.Under the condition of certain laser power,the number of laser pulse can influence the formation of ripples.     

美国研究型大学科研不端行为——概念、特点及对策

本文着眼于美国研究型大学科研不端行为的研究,探讨分析了科研不端行为的概念以及研究型大学中科研不端行为的特点,并讨论了联邦政府和以科研诚信办公室为主的科研管理机构在处理科研不端行为时所采取的主要应对措施。     

Science and it’s Images – Promise and Threat: From Classic Literature to Contemporary Students’ Images of Science and “The Scientist”

The physical and social image of the scientist among school children, student teachers, and teachers over the last 50 years was investigated. Interest has also been shown in the perception of the personality behind the physical stereotype. Nevertheless, the value judgments of science and scientists and the positive and negative mind–sets attaching to these judgments in our society were less investigated, either in Israel or abroad. In this investigation models given to science and scientists in the classical literature and by some popular science writers were investigated, together with contemporary learners’ views. The populations consist of 125 high school students from Israel. Several tools were used during this investigation to decipher the images of science: Closed questionnaire, writing an essay, and semistructured collective interviews. Classical authors have pessimistic views about science and the scientists. Most models are unfavorable, and criticize the scientists: The mad and monstrous scientist (Frankenstein), the scientist who is alienated from human life (The Physicists), the scientist who is cut off from reality, the “geek” (Gulliver’s Travels), the scientist whose irresponsible research is harmful to the environment (Jurassic Park), the scientist who hungers for knowledge at any cost (Faust). The positive images found especially in the popular science literature: the scientist who cures diseases (Microbe Hunters), the scientist who has professional integrity (Galaxies), the scientist who keeps to the rules of the scientific method to obtain objective results (Wrinkles in Time). We found that some expressions relating to fear of science which have appeared in the classics since the beginning of the 18^th century were found in a similar way with students of the 21^st century, while others expressed that same fear in different ways. There was also an identification with Swift’s “unsociable and unemotional” scientists. Alongside the existence of expressions of fear of science, and mainly ambivalent opinions of students toward science, the dominant picture that stands out in this study is that our contemporary students are pro science, and regard science as a useful area of society.     

重事实 重学问——《阅微草堂笔记》对传统观念的坚持

《阅微草堂笔记》是纪昀因不满《聊斋志异》而创作的,作为与《聊斋志异》相对立的一部作品,纪昀把真实和学问放在首要的位置。与此相呼应,在艺术手法上也形成了自己独特的效果。     

中国经济增长与公共图书馆发展的关系研究 ——基于异质门槛效应视角

[目的/意义]探究中国经济增长对公共图书馆发展影响的门槛效应,这将对落实以为人本的科学发展观,促进公共文化事业发展,保障经济稳定发展给予有力的数据支持.[方法/过程]收集2008—2019年中国31个省、市、自治区的面板数据,运用非参数核密度估计展示中国经济增长与公共图书馆发展的动态演化过程,并构建面板门槛模型考察两者...     

信息隐藏技术在电子政务中的应用

信息隐藏技术的出现和发展,为信息安全的研究和应用拓展了一个新的领域.介绍了版权保护中的信息隐藏技术——数据锁定、隐匿标记及数字水印技术;论述保密通信中的信息隐藏技术——数字签名中的阈下信道和Internet上的匿名连接技术,展望了信息隐藏技术的发展.     

知识溢出、人力资本构成与全要素生产率——基于我国省际面板数据的研究

以内生增长理论为基础,利用我国省际面板数据检验了国内研发、知识进口和人力资本对全要素生产率的影响。研究发现,国际技术溢出是我国技术进步的主要来源,高等教育程度的人力资本对我国全要素生产率的作用为负,其原因在于人力资本配置的非效率;研究还发现,只有中等教育程度的人力资本才是国际技术转移的吸收者。此外,分组检验没有发现技术外溢和人力资本对全要素生产率的影响存在门槛效应。     

转变高职毕业生就业观念的途径探讨

我国高等职业教育随着国民经济体制和教育体制改革的深入得到了跨越式发展,与此同时,高职毕业生就业难的问题也逐渐突显出来。本文就高职毕业生在就业观念上的误区进行了分析,着重探讨了转变高职毕业生就业观念的途径,提出了自己的一些看法和意见。