摘要：To study the effects of perceived control on human thermal sensation and thermal comfort in heated environments,a psychological experiment was *** total,24 subjects participated in an *** experiment consisted of two cases in which the indoor temperature was set at 18℃ with different cold radiation *** experiment lasted for 120 min and was divided into three phases,adaptation,without perceived control and perceived *** the second phase,the subjects were told in advance that the indoor temperature could not be *** the third phase,subjects were told that they could adjust the indoor temperature to meet their own thermal expectations,but the indoor temperature could not actually be *** results showed that the effect of perceived control on thermal sensation was related to the thermal *** people with strong expectations for a neutral environment,perceived control improved their thermal sensation by satisfying their thermal *** people with low thermal expectations,perceived control reduced their thermal tolerance to the environment,eventually leading to thermal *** new findings provide more supports for the importance of psychological effects and a reference for the personal control of heating temperatures.

摘要：反应塔对电厂的烟气排放及安全运行至关重要,其锥体上端连接焊缝及其周边区域易腐蚀减薄,针对某拟建反应塔项目,基于弹塑性损伤力学建立了反应塔三维损伤模型,分析了反应塔在静力荷载及动力荷载作用下筒体变截面处焊缝的应力变化情况,模拟了直筒段与锥体连接处的损伤,提出了一种加固方法。结果表明:静力荷载作用下反应塔原结构腐蚀后焊缝最大等效应力为未腐蚀前的2.4倍;反应塔加固结构焊缝应力明显小于未加固结构,在加筋板处应力显著降低;灰块冲击载荷作用下,与原结构相比加固结构的损伤区域明显变小,最大损伤值亦变小,加固结构损伤主要在第2个加固筋板附近;由于加筋板的存在,焊缝变形小于原结构。

摘要：为了尽量降低任意多边形裁剪复杂度,提出了一种基于多边形顶点遍历的简单多边形裁剪算法。该算法将多边形交点插入到裁剪多边形和被裁减多边形顶点矢量数组中,通过记录交点及其前驱、后继信息,可快速生成结果多边形。其中,时间复杂度为O((m+k)×k),m是两多边形中顶点数较大者,k是两多边形的交点数。该算法简化了交点的数据结构,节省了存储空间,降低了算法的时间复杂度,具有简单、易于编程实现、运行效率高的特点。

摘要：大跨径钢桥面铺装是桥梁建设和养护的关键技术之一,文章以六盘水抵母河特大钢桁梁悬索桥为依托工程,根据贵州省境内同类型钢桥面病害类型,结合该桥面铺装设计方案,展开防水粘结材料对比实验及相关材料性能研究,证明了"高弹改性沥青SMA10+浇注式混凝土GA10"钢桥面铺装设计的可行性,为今后大跨径钢桥面铺装技术设计及养护施工提供参考。

摘要：将传统井式淬火油槽的外循环冷却系统更改为水冷腔冷却,对带水冷腔的井式淬火油槽热平衡进行全面的计算与分析,并对此型淬火油槽设计、制造及检验提出了优化建议。

摘要：目的 优化天钩平肝复方的提取工艺参数。方法 采用高效液相色谱(HPLC)法,以天麻素、栀子苷、葛根素、黄芩苷及固体总量为评价指标,考察提取次数、提取时间、加水倍数,采用熵权法分析各指标的权重系数,结合Box-Behnken设计-响应面法优化天钩平肝复方最佳提取工艺参数。结果 天麻素、栀子苷、葛根素、黄芩苷分别在25.35~304.90,3.75~45.00,5.91~106.50,5.01~30.00μg/ml范围内呈良好的线性关系,R^(2)分别为1.0000,1.0000,1.0000,0.9999。采用熵权法进行综合评分,栀子苷、葛根素、黄芩苷、天麻素及固体总量的权重系数(W_(j))分别为0.2282,0.1999,0.1914,0.3255,0.0550,且根据Box-Behnken设计-响应面法优化的结果,确定天钩平肝复方最佳提取工艺为加10倍量水煎煮提取2次,每次1.5 h。结论 优化后的天钩平肝复方提取工艺稳定性高,重复性好,适用于批量生产。

摘要：液压操动机构密封性能是影响其可靠性的重要因素,该文针对一种液压操动机构储能模块的动密封结构进行了研究,对该部位动密封结构及密封性能进行了分析,找到了影响储能活塞动密封性能的主要因素,通过对不同密封结构的对比分析,经过设计计算,提出了一种对储能活塞动密封结构的优化改进方案,通过试验验证,该优化改进方法有效提升了液压操动机构储能模块的密封性能。