时评应然功能及当代时评症结——兼论三次“时评热”社会背景

文人论政是中国近代知识分子的优良传统,近代中国报刊的发展使时评成为文人论政的轻骑兵。纵观中国新闻史,时评热多发生在社会转型期。社会问题多发,公民的参政意识增强,在报刊上形成公开讨论社会问题的公共领域,成为公共领域的主要担当。当代时评热发生在由计划经济向市场经济转型的历史时期,新媒体的高度发展、新闻娱乐化的大背景,导致了时评症结的出现。

“时评热”背后的几个误区

近几年时评得到了快速发展,既是新闻竞争的结果,也是新闻事业整体发展的体现。但我们同时也应该看到,在时评速热过程中,也出现了一些误区,需要引起时评创作者和时评编辑的注意。

Evaluation on Solar Radiation Resource and Photosynthetic and Thermal Potential Productivity in Shandong Province

To evaluate scientifically the change of photosynthetic and thermal potential productivity caused by climate variation,based on comparison with mean of previous 30 years(1971-2000),the change of total solar radiation,sunshine hours,photosynthetic active radiation,photosynthetic and thermal potential productivity since 2001 were analyzed through data of radiation,sunshine and temperature in Shandong Province from 1971 to 2007,and the change trend was also tested by Mann-Kendall non-parametric statistical met...