美国教育资源共享的经验及其启示——休斯的理论观点

文章介绍了美国教育资源共享方面的理论和实践经验，主要是休斯对教育资源共享的原因、模式、影响因素以及配套措施等方面的研究。这对我国当前教育资源合理配置具有一定的启示和借鉴意义。     

大学产学研合作支持体系的构建

在借鉴发达国家成功经验的基础上,本文提出了从完善大学产学研合作政策法规体系与激励机制、设置与产学研合作发展相适应的促进机构、建立促进大学产学研合作的综合服务和网络化支持体系、制定有利于校内外人员交流的人事管理制度四个方面来构建大学产学研合作支持体系,并对我国大学的产学研合作支持体系构建提出了建议。     

Effect of Mixed Solvents and Additives on the Habit Modification of 6-APA Crystals

6-aminopenicillanic acid (6-APA) crystals obtained under different physical and chemical conditions of the solutions may present different habits. The habits of diamond-shaped plates are desirable compared with other habits of 6-APA crystals. To obtain ideal 6-APA crystals, the effects of the mixed solvents and additives on 6-APA crystal habits were investigated. Ethanol or acetone was used as the organic solvent, and impurities existing in the ,6-APA purification process were used as the additives. 6-APA growth habits were changed when the concentrations of ethanol, acetone or phenyl acetic acid were increased to exceed their critical concentration. The observed results show that the dominant face on 6-APA crystals was identified to be , {020}, but the overall habit was controlled by the relative growth rates of the : 101 and {002} faces. Crystal growth rates and habits can be appreciably changed by specific adsorption of additives on crystal faces. In some cases solvent molecules can act in a similar way and may be regarded as bulk additives. The effects of additives and organic solvents on 6-APA crystal habits were the results of adsorption effect,which fitted the experimental results quite well.     

Rapid phenotypic evolution with shallow genomic differentiation during early stages of high elevation adaptation in Eurasian Tree Sparrows

Known as the ‘third polar region’, the Qinghai-Tibet Plateau represents one of the harshest highland environments in the world and yet a number of organisms thrive there. Previous studies of birds, animals and humans have focused on well-differentiated populations in later stages of phenotypic divergence. The adaptive processes during the initial phase of highland adaptation remain poorly understood. We studied a human commensal, the Eurasian Tree Sparrow, which has followed human agriculture to the Qinghai-Tibet Plateau. Despite strong phenotypic differentiation at multiple levels, in particular in muscle-related phenotypes, highland and lowland populations show shallow genomic divergence and the colonization event occurred within the past few thousand years. In a one-month acclimation experiment investigating phenotypic plasticity, we exposed adult lowland tree sparrows to a hypoxic environment and did not observe muscle changes. Through population genetic analyses, we identified a signature of polygenic adaptation, whereby shifts in allele frequencies are spread across multiple loci, many of which are associated with muscle-related processes. Our results reveal a case of positive selection in which polygenic adaptation appears to drive rapid phenotypic evolution, shedding light on early stages of adaptive evolution to a novel environment.     

文献资源发展政策简论

文献资源发展政策(即馆藏发展政策)研究于20世纪70年代起始于美国,此后20年,文献资源发展政策实践在美国图书馆界得到了大力普及.我国图书馆界虽然从20世纪80年代起就开展这项研究,但时至今日,我国文献资源发展政策实践成果仍寥寥无几.文献资源发展政策可分为"总纲""学科文献资源描述""附件"三个部分,文章从编制实践出发,对撰写"政策"时需要明确的具体内容进行详细阐述,同时提出了文献资源发展政策工作办法.参考文献6.     

从三元参与者与大学科技园的互动博弈看大学科技园的发展

本文从大学、政府及企业与大学科技园互动博弈的角度分析了大学科技园的发展。大学科技园的发展必须是在与大学、政府和企业博弈的条件下才能更理性地进行,而从这一博弈过程来研究大学科技园的功能就更加具有意义。     

人际情报网络分析的方法和模型研究

本文利用信息论中的信息熵、模糊数学中隶属函数及离散数学中的图论等基本理论,研究了人际情报网络分析的方法和模型.首先,总结了已有的人际网络表达与分析的主要方法;其次,根据申农理论得出人际情报网络中节点间信息流量的计算公式,提出了联系效度的概念,在此基础上进一步分析了网络联系效度与流经的有效信息量之间的四种函数关系;最后,探索了人际情报网络无向图和有向图的分析方法,为人们了解人际情报网络中的关键节点、节点的分布以及网络的结构、联通性等提供有效的参考依据.     

浅谈高水平民办大学教学方法的改革与创新

高水平民办大学教学方法的改革与创新对于高等教育突破性发展,提高高等民办教育综合竞争力和提高学生满意度具有十分重要的意义。要提高教学方法与质量,强化建设教师队伍,实现高水平民办大学的创新。     

21世纪图书馆需要复合型人才

２１世纪图书馆需要复合型人才●张东肖洪远ＡＢＳＴＲＡＣＴＴｈｅｉｎｔｅｌｅｃｔｕａｌｓｔｒｕｃｔｕｒｅｏｆｐｅｒｓｏｎｎｅｌｗｉｔｈｍｕｌｔｉｐｌｅｓｋｉｌｓｃｏｎｔａｉｎｓ：ｓｏｃｉａｌｂａｓｉｃｋｎｏｗｌｅｄｇｅ，ｋｎｏｗｌｅｄｇｅｏｆｄｏｃｕｍ...     

数字图像处理课程的实例教学

数字图像处理技术是一门发展很快且应用面很广的学科。本文从实践教学的角度对案例法在数字图像处理课程中的应用进行了探讨,并给出了实例。该方法应用到教学过程中,收到了较好的效果,对提高课程教学质量,培养学生的实践和创新能力具有一定的参考价值。