关于CALIS三级系统建设的思考

文章从四个方面论述了CALIS三级系统建设需要关注的问题。     

唯物、唯心和客观、主观的结论为时过早——再谈档案"有意识形成论"

关于档案的"自然形成规律"的命题,我在80年代初《科技档案工作的任务与范围初探》一文中①提出了异议,但当时并不知道"自然形成规律"命题的历史背景.     

论高晓声小说中的“鲁迅风”

高晓声的小说创作与鲁迅有着深刻的联结。在"为人生"的创作宏旨下,高晓声在农民题材以及深入探讨"国民性"问题上对鲁迅进行了继承与发展;在艺术表现手法上,高晓声师承了鲁迅的白描、细节描写、心理描写等刻画人物的手法以及含蓄的辛辣、寓涩于笑的幽默风格,其后期的象征主义与现实主义巧妙结合的作品,是对鲁迅所坚持的现实主义小说创作传统的努力回归。     

Language in the Family Domain in Singapore: An Analysis of the 1980 Census Statistics

The 1980 population census of Singapore is the first census that gathered detailed information on languages spoken at home. The data were collected from the 20 per cent sample enumeration, using the following question:     

A preliminary investigation on diffusion through a layered system

We introduce layered systems such as the citations–citing authors–citing institutes–citing countries one. Diffusion of scientific ideas flows through such layered systems. Our contribution contains three main topics: a fractional counting system for the number of different units in a layer; the fractional number of items of the same type, i.e. in the same layer, over which ideas have been diffused; and the evenness of diffusion over different layers. In this way we construct a coherent system to measure the extent to which scientific ideas are diffused.     

数据分类在营销策略中的应用研究

本文使用ID3算法建立了客户与产品消费之间的决策树分类器模型,利用该分类器对目标客户进行分析,确定重点客户,对客户群实施差异化营销策略,缩减营销成本,提高营销效果,并通过实例验证了该方法具有一定的可信度。     

Effective cell collection method using collagenase and ultrasonic vibration

This study proposes a novel cell collection method based on collagenase treatment and ultrasonic vibration. The method collects calf chondrocytes from a reusable metal cell culture substrate. To develop our concept, we calculated the natural vibration modes of the cell culture substrate by a finite element method, and conducted eigenvalue and piezoelectric-structural analyses. Selecting the first out-of-plane vibration mode of the substrate, which has a single nodal circle, we designed and fabricated the cell collection device. The excited vibration mode properly realized our intentions. We then evaluated the cell collection ratio and the growth response, and observed the morphology of the collected cells. The collagenase and ultrasonic vibration treatment collected comparable numbers of cells to conventional trypsin and pipetting treatment, but improved the proliferating cell statistics. Morphological observations revealed that the membranes of cells collected by the proposed method remain intact; consequently, the cells are larger and rougher than cells collected by the conventional method. Therefore, we present a promising cell collection method for adhesive cell culturing process.