At present, more and more cable tunnels use robots for inspection and fire extinguishing.However, due to the fire protection requirements, the cable tunnels are actually installation one-way opening fireproof doors that are only suitable for manual opening. Cable tunnel robots usually push doors to pass through,resulting in only It can pass in the forward direction but cannot pass in the reverse direction, which brings a lot of inconvenience. Based on the TRIZ theory, this paper analyzes the problem of two-way passage through fireproof doors for cable tunnel robots, and proposes a special two-way fire-proof door for cable tunnel robots. The main fire-proof door and the auxiliary fire-proof door are set, and the main fire-proof door leaf and the auxiliary fire-proof door leaf are set up. The linkage mechanism ensures that when the fire extinguishing robot passes in the reverse direction, the main fire-proof door is automatically opened by the auxiliary fire-proof door, which facilitates the free entry and exit of the robot, so that the cable tunnel robot can autonomously pass through the fire-proof door in both forward and reverse directions.
针对当前消毒薄膜抑菌效果有待提高,以及制备过程中安全性差、均匀性不容易控制、结合力差的问题.本文研究了制备多功能抗菌薄膜的微纳工艺,工艺包括镀银膜、喷涂TiO2 纳米颗粒、镀聚四氟乙烯膜和纳米压印4个步骤.采用金黄色葡萄球菌进行抑制菌实验,结果表明,本文制备的抗菌膜的抑菌效果是湿法镀银工艺制备的消毒膜的 3.7倍.本研究为人类健康,特别是医疗器械等行业抑菌杀菌膜的生产提供了新产品和新工艺.
以三级旋流器的中心分级燃烧室为研究对象,利用数值模拟的方法研究值班级第 1 级叶片安装角对中心分级燃烧室性能的影响.在保证旋流器结构第 2 级和主燃级叶片不变的前提下,改变第1 级叶片角,基于此设计了三种方案:30°、45°和 60°,并以45°为参考方案.结果表明:值班级第 1 级叶片安装角不是燃烧室回流区形成的决定性因素;相较于参考方案,第 1 级叶片角过小会导致燃烧室温度分布恶化,局部温度增大;叶片角过大会导致旋流器内部温度过高,两种情况均会导致出现局部高温区域,且局部高温区域产生的污染物NOX将会增加.对于该中心分级燃烧室模型而言,值班级第1 级叶片安装角合理值为45°左右.
民族舞蹈作为民族文化的瑰宝,通常以视频形式保存和传播,为解决由于视频动态模糊造成的误差,提出一种基于HR-Net32 和多头注意力机制的MT-Net三维人体姿态估计模型.首先,以ROMP为基础模型并将主干ResNet-50 替换为HR-Net32 以提高特征提取能力;其次,在支路中插入多头注意力模块,抑制冗余干扰特征,突出舞者肢体,达到对特征的高效筛选;最后,根据奥卡姆剃刀原则,将多条支路设计为相同结构,提高模型训练效率.经实验验证,所提MT-Net模型在 3DPW数据集上与ROMP相比,MPJPE和PA-MPJPE分别降低 2.1%和3.3%.满足对民族舞蹈进行姿态估计的任务需求.
示踪气体混合均匀性是执行核电站主控室可居留性内漏试验的关键因素之一,本文通过CFD技术对主控室可居留区域内部示踪气体扩散过程进行数值模拟.根据模拟结果可基本掌握主控室可居留区域内部示踪气体扩散及流场分布情况,针对局部浓度异常区域合理布置气体混合设备,将明显改善示踪气体浓度分布均匀性.
