摘要：文中设计了一款基于微信小程序的特殊群体防走失定位系统,该系统分为硬件部分和软件部分。硬件部分选用STC15单片机,搭配NB-IoT模块和GPS模块设计定位器;软件部分采用微信小程序即可实时查看特殊群体的位置信息。当特殊群体按下定位器的提醒按钮,定位器可以向监护人手机发送位置提醒消息,同时,微信小程序中还可以设置安全活动范围,一旦超出设置范围,定位器立即向监护人手机发送消息及时提醒。

摘要：As an important energy carrier in terms of carbon neutrality,green hydrogen produced by water electrolysis using renewable electricity has attracted worldwide *** polymer electrolyte water electrolyzer(PEWE)has the potential to be a mainstay in the green hydrogen market in the future because of its superior ***,the development of PEWE is constrained by the slow progress of the membrane electrode assembly(MEA),which is an essential component of PEWE and largely determines the cost and performance of the ***,the MEA must be optimized from the aspects of reducing cost and improving performance to promote the development of *** this review,we first discuss the recent progress of the materials and design strategies of MEA,including the cost,activity,and stability of catalysts,distribution and thickness of ionomers,and ion transport efficiency of ion exchange membranes(IEMs).Then,the effects of all components and interlayer interfaces on the ions,electrons,and mass transfer in MEA and,consequently,the performance of PEWE are ***,we propose perspectives on developing MEA by optimizing the catalyst activity and stability of IEM,interface contact between adjacent components,and evaluation methods of performance.

摘要：本研究优化了黄芪丹香颗粒的成型工艺。以稀释剂用量比例、润湿剂浓度和润湿剂用量作为考察因素,以成型率、吸湿率和休止角作为评价指标,在单因素考察试验的基础上,应用Box-Behnken响应面设计结合G1-熵权法优选黄芪丹香颗粒的成型工艺。结果得到最优成型工艺为糊精与干膏粉的比例是0.8:1,以90.5%的乙醇溶液作润湿剂,用量为混合粉重量的22%。验证试验中颗粒的成型率、吸湿率和休止角分别为92.41%、9.93%和29.7°,综合评分为95.69,与预测值接近。结果表明优选的成型工艺稳定可行,可为黄芪丹香颗粒的工业化生产提供依据。

摘要：本试验旨在对院内制剂清胃片中挥发油的提取工艺进行研究,使清胃片挥发性成分提取完全,从而更好地发挥药物治疗作用。采用水蒸汽蒸馏法提取清胃片中的挥发油组分(木香、丁香和薄荷),以挥发油提取量、木香烃内酯和去氢木香内酯含量为指标,通过单因素考察、响应面设计试验确定药材中挥发油组分的最佳提取工艺。试验最终得到清胃片中挥发油的最佳提取工艺:药材加8倍量水,浸泡2 h,水蒸气蒸馏法提取7 h得挥发油组分。挥发油提取工艺准确、稳定、可靠,为清胃片中挥发油提取工艺的优化完善提供参考,可用于清胃片的批量生产,为其进一步开发利用提供有力支撑和理论依据。