摘要：Emotional contagion, a primary form of empathy, is present in rodents. Among emotional contagion behaviors, social transmission of fear is the most ***, we modified a paradigm used in previous studies to more robustly assess the social transmission of fear in rats that experienced foot-shock. We used resting-state functional magnetic resonance imaging to show that foot-shock experience enhances the regional connectivity of the anterior cingulate cortex(ACC). We found that lesioning the ACC specifically attenuated the vicarious freezing behavior of foot-shock-experienced observer rats. Furthermore, ablation of projections from the ACC to the mediodorsal thalamus(MDL) bilaterally delayed the vicarious freezing responses, and activation of these projections decreased the vicarious freezing ***, our results demonstrate that, in rats, the ACC modulates vicarious freezing behavior via a projection to the MDL and provide clues to understanding the mechanisms underlying empathic behavior in humans.

摘要：零件在切削加工过程中,通常需要使用冷却液来降低切削温度,以保证加工零件质量,延长刀具寿命。设计一种全自动冷却供给系统,由控制冷却液流速随切削温度变化的控制模块、冷却液箱中液位控制模块以及冷却液循环利用回收模块三部分组成。通过温度传感器及液位传感器将采集到的数据送入单片机,从而控制冷却液的流速和完成冷却液的自动补给。该系统可实现冷却液供给过程的自动化,达到节能环保、降低生产成本的目的,具有很好的应用价值。

摘要：以中国·红岛国际会议展览中心工程为依托,进行实体约束应变监测试验,研究上部超长预应力混凝土结构约束应变的影响因素。根据试验结果提出上部超长预应力混凝土结构施工时应选择合理的施工时间,尽量减少季节温差;在设计与施工过程中应考虑季节突变温差的影响;及时施加预应力,从而控制混凝土约束应变。

摘要：为了明确泉州地区马铃薯田杂草发生种类和防除适宜药剂,系统调查本地区马铃薯田杂草种类,并采用随机区组设计,研究4种苗前除草剂和2种苗后除草剂对马铃薯泉薯5号的防除效果。结果表明:泉州地区马铃薯田杂草种类有30种以上,其中,有害阔叶杂草有藿香蓟、刺苋、习见蓼、蓼、地锦、鸭跖草、小蓬草、鬼针草、猪殃殃、藜、地肤、繁缕;常见阔叶杂草有凹头苋、莲子草、丁香蓼、荠菜、风轮菜、龙葵;常见禾本科杂草有狗牙根和马唐;常见莎草科杂草有香附和碎米莎草。苗前除草剂60%丁草胺和48%止芽素的45 d相对鲜重防效分别为75.85%和73.67%;苗后除草剂25%砜嘧磺隆水分散粒剂的45 d相对鲜重防效为89.3%。在阔叶杂草和禾本科杂草综合防除效果方面,以25%砜嘧磺隆水分散粒剂最好,60%丁草胺和48%止芽素表现较好,均可作为泉州地区马铃薯田的除草剂推广使用。