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生活的馈赠──《今年卖茧好轻松！》采写追记四川绵阳市《游仙报》王永昭没有想到,我的不足７００字的通讯《“今年卖茧好轻松！”）荣获四川省新闻奖一等奖。手捧获奖证书,我从心底里感谢生活“老师”。采写背景我从小就生活在山沟溪谷。１０多年的农村生活使我对农村... 相似文献
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研究了论域和粒化论域上由Zoom-in算子与Zoom-out算子复合生成的近似算子的性质,讨论了这些算子与拓扑空间及Galois联络之间的关系。 相似文献
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今年是绵阳市游仙区全西推行“预约售茧，组合抽样，试绿计价，二次近利”的第一年。6月198，笔者访问好几个黄站，农民对这一新的售艺方式发出由方的赞叹。一到择绵重越，窗外没有排长队，更没人吵架，农民三三两两地日在一起选茧子，电子秤台前，工作人员平静而有序地忙碌着。我随手抓起一把茧子，个个干燥硬扎，放在耳边一摇，虽蛹“才难”作响，简直熟透了。不一会儿，选好的茧子送到电子秤台上，电脑屏幕上数字不断闪烁，很快计算出价格；当着农民的面，茧站工作人员抽样、削口、烘干、拣次革，用天平静和供箱测出了样茧的各种外现质量… 相似文献
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The Kirchhoff thin elastic rod models are always the important basis to explore the configuration mechanism of the flexible structures in both the macroscopic and microscopic scale. As a continuum model of DNA, a thin elastic rod subjected to interfacial interactions is used to investigate the helical equilibrium configuration of DNA in salt solution. In this paper, the Kirchhoff’s equations in the presence of interfacial traction and the free energy density functions of different configurations are studied. The transition formula of the free energy between B-DNA and ZDNA is obtained, and the results show that the free energy of the transition is mainly determined by the salt concentration, which agrees well with the experimental data. 相似文献
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