上油溪大桥加固处治方案优化研究

随着近年石拱桥倒塌事故的增加,石拱桥改造习惯性地采取拆除重建或拆除上部拱式结构的方案,造成了一些不必要的浪费。文中以新化县上油溪大桥为例,介绍了石拱桥改造过程中的处治方法优化。通过方案优化,节省了大量改造资金,缩短了一年的工期,并有效降低了施工过程中的风险,桥梁运营一年后未出现病害,状况良好。

抗战时反日货走私的点滴回忆

1938年10月，日军侵占广州，12月侵占武汉，但由于日军战场面积扩大、战线延长，加之国民党军队正面抗击与八路军、新四军在敌后的游击战争相结合，迫使日本侵略军只能龟缩在一点一线上，大部分沦陷地区政权仍为我控制，前线的战斗也暂时处于沉寂阶段。

莲叶田田入诗来

生长在江南水乡的人们，没有不知道莲的。莲即“荷”，古来亦有“芙蓉”“芙蕖”“菡萏”等别名。主要分布于我国中南部地区，以江浙地区最为广泛。如果说人们喜欢莲，不如说更喜欢它美丽的花。莲每年开花一次，人们常称之为“荷花”。荷花怒放于盛夏碧波之中，叶似碧玉盘，茎如翠绿柱，单瓣或重瓣呈粉红、白色的顶花，如凌波仙子般亭亭而立，清香远溢。

Microwave firing-incubation of cage-like (Ba,Sr)_3MgSi_2O_8:0.06Eu^(2+),0.1Mn^(2+) sphere from sprayed template-free xerogel particles

Morphology control of cage-like （Ba,Sr）3MgSi2O8：Eu,Mn luminous sphere in micrometer size with a simultaneous 660 nm/430 nm-featured band emission was investigated via microwave （MW） firing procedure. A firing temperature range associated with distinct reaction of xerogel particles was determined by thermal analysis, at which the pure host phase of （Ba,Sr）3MgSi2O8 was formed and the release of decomposed gas from the precipitated nitrates played a key role in controlling the multi-scale structured morphology. As-prepared Ba1.14Sr1.7MgSi2O8：0.06Eu2＋,0.1Mn2＋ samples featured in a band emission simultaneously emitting at both 660 and 430 nm under 350 nm light excitation by MW procedure with an enhancement emission compared to the sample by solid state procedure. The results suggested that MW firing procedure affected assembling cage-like particle in meso-, nano- and submicro- meters to achieve photoluminescence （PL） enhancement of the simultaneous red/blue emission.

致敬鼠标之父 未来鼠标：意念领导计算机

7月3日，美国传来噩耗，鼠标之父恩格尔巴特辞世，享年88岁。他被誉为计算机界的爱迪生。