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我国出版文摘类报刊,已有近百年历史。但真正形成规模具有较大影响,还是在改革开放以来这段时间。经过这十几年的发展,文摘报已成为我国报业中的一个重要组成部分。在中国报刊史上,最早问世的文摘报刊是1897年(清光绪二十三年)在上海创刊的《集成报》。它“甄录群报”,所搞的报刊主要有《时务报》、《万国公报》、《博闻报》、《新闻报》、《官书局报》、《汉报》、《中西报》等,还摘译了外文报 相似文献
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我国的文摘类报刊从最早的《集成报》(1987年、上海)迄今,已有近百年历史。但从真正意义上来说,文摘报的发展还是在近十几年改革开放时期。目前,我国有文摘类报纸有30多家,各种报纸开办的文摘版、文摘专刊达140多家。文摘类报纸的期发行量总计达1100万份,拥有读者过亿。 文摘报刊的猛增,表明了现代生活节奏越紧张,人们越希望快速阅读高效吸收所需求的信息,越是进入信息社会,人们越感觉到信息选择的困难。以博采众长、信息丰富为特点的文摘报刊恰好满足了人们的需求,这就是文摘报刊生生不息的根本原因。 相似文献
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Bearing Behaviors of Stiffened Deep Cement Mixed Pile 总被引：1，自引：0，他引：1
A series of investigations were conducted to study the bearing capacity and load transfer mechanism of stiffened deep cement mixed (SDCM) pile. Laboratory tests including six specimens were conducted to investigate the frictional resistance between the concrete core and the cement soil. Two model piles and twenty-four full-scale piles were tested to examine the bearing behavior of single pile. Laboratory and model tests results indicate that the cohesive strength is large enough to ensure the interaction between core pile and the outer cement-soil. The full-scale test results show that the SDCM piles exhibit similar bearing behavior to bored and cast-in-place concrete piles. In general, with the rational composite structure the SDCM piles can transmit the applied load effectively, and due to the addition of the stiffer core, the SDCM piles possess high bearing capacity. Based on the findings of these experimental investigations and theoretical analysis, a practical design method is developed to predict the vertical bearing capacity of SDCM pile. 相似文献
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