Cerebral Ischemia Reperfusion Exacerbates and Pueraria Flavonoids Attenuate Depressive Responses to Stress in Mice

Previous studies have shown that mice experiencing cerebral ischemia reperfusion （CIR） and stress can serve as a model of post stroke depression （PSD）. The present study verified the acute antidepressant effects of radix puerariae extract （PE） on PSD mice through behavior and gene expression experiments. CIR was found to reduce the sucrose consumption and tyrosine hydroxylase （TH） gene expression. PE administration after CIR surgery was observed to significantly enhance the mRNA expression of TH in the hippocampus compared with the PSD group on Day 0 and Day 3 postsurgery. These findings indicate that PE contributes to the amelioration of behavior response in PSD mice, which is closely related with the protective effects of catecholamine synthesize against CIR brain damage.     

“Riding” behaviour by males of Conops quadrifasciata (Diptera: Conopidae): Do females set up “riders” as targets for takeovers by larger males?

Males of Conops quadrifasciata “claim” females in late morning and then spend the rest of the day exposed as “riders” to attacks by other males. Male riders can respond to an attack by performing an abdomen‐lift which denies the attacker access to the female's genitalia. Attacking males can tailor their behaviour to suit the prevailing conditions. If a rider is engaged in a “repeat” copulation (as he does at regular intervals), the attacker “waits” beside the rider. If the rider is not in genitalic contact with the female, the attacker tries to mate with her immediately. It is proposed that females deliberately expose their riders to takeovers in order to gain the fittest mate.     

应用单片机进行距离保护的研究

本文论述了单片机距离保护的原理,提出了一种改进算法,进行了对应的软件、硬件试验,证实了算法是可行的且有一定的优越性。     

螺旋管流输移固粒与起旋器效率

圆管螺旋流输移固体颗粒是利用螺旋流将推移质转变成“悬移质”的一种新的高效输移固粒的方式。文章侧重讨论螺旋管流输移固粒的特征机理与起旋器效率的测试与计算方法。初步试验表明，利用管内导叶式起旋器可有效地形成管道螺旋流。     

模具堆焊焊条的研究

综述了国内外耐磨时铲焊条研制现状,指出模具堆焊焊条发展方向,提出了自然时效焊条设计思想,并得出一些实验结果。     

“网约车新政”政策议程设置的多源流分析

《网络预约出租汽车经营服务管理暂行办法》确立了网约车在中国的合法地位。本文使用多源流理论分析该《暂行办法》是如何进入决策者视野、走上政策议程的。网约车监管与治理问题的构建(问题源流)、各方观点及政策主张(政策源流)、政府机构与其他利益代表方的立场(政治源流),这3个源流在政策窗口打开时交汇,由交通运输部将网约车新政提上政策议程。