Biomass-based hydrocarbon fuels,as one of the alternatives to traditional fossil fuels,have attracted considerable attention in the energy field due to their renewability and environmental benefits.This article provid...Biomass-based hydrocarbon fuels,as one of the alternatives to traditional fossil fuels,have attracted considerable attention in the energy field due to their renewability and environmental benefits.This article provides a systematic review of recent research progress in the chemical synthesis of biomass-based hydrocarbon fuels.It outlines the conversion pathways using feedstocks such as lipids,terpenoids,cellulose/hemicellulose,and lignin.Depending on the feedstock,various products with distinct structural characteristics can be prepared through reactions such as cyclization,condensation,and catalytic hydrogenation.Throughout the synthesis process,three key factors play a critical role:efficient catalyst development,production process optimization,and computational-chemistry-based molecular design.Finally,the article discusses future perspectives for biomass-based hydrocarbon fuel synthesis research.展开更多
目的解析国内外食品包装设计领域研究现状、研究热点及未来发展趋势等,为行业相关从业者提供参考。方法应用CiteSpace软件,以2014年至2023年CNKI和Web of Science的核心期刊数据库作为国内外数据来源,通过文献数量、文献溯源、核心作者...目的解析国内外食品包装设计领域研究现状、研究热点及未来发展趋势等,为行业相关从业者提供参考。方法应用CiteSpace软件,以2014年至2023年CNKI和Web of Science的核心期刊数据库作为国内外数据来源,通过文献数量、文献溯源、核心作者分析和发文机构分析、关键词共现、研究进程分析方法,进行可视化分析和综述。结果国外该领域发文数量稳步增长,欧美等国发文量较大且合作密切,中国发文量相对较少且影响力有限;国内在研究领域中注重包装设计与文化表达、材料与技术研究、用户体验与互动设计,国外更关注消费者行为、健康、新型材料和技术,以及信息传播等;国内研究从满足基础需求和功能性设计逐渐转向文化表达、用户体验与教育实践探索,国外则从早期注重消费者行为与健康导向逐渐转向后期环保材料与包装功能性的深度探索。结论食品包装设计领域在国际上呈现出较强的研究活跃度,国内仍需加强研究合作与创新。未来的研究趋势可以侧重于智能包装、可持续材料的应用,以及消费者行为的影响,这对推动食品包装设计领域的创新与可持续发展具有重要意义。展开更多
基于荧光淬灭原理的光纤氧传感器一直是许多研究工作的重点。介绍了一种制作简单、成本低的光纤氧传感器制造方法。该方法基于荧光淬灭原理,在光纤末端涂覆荧光材料铂八乙基卟啉(PtOEP)实现的。传感器中荧光材料被395nm的紫光激发,并由...基于荧光淬灭原理的光纤氧传感器一直是许多研究工作的重点。介绍了一种制作简单、成本低的光纤氧传感器制造方法。该方法基于荧光淬灭原理,在光纤末端涂覆荧光材料铂八乙基卟啉(PtOEP)实现的。传感器中荧光材料被395nm的紫光激发,并由Y形光纤引导,使用广州犀谱光电USB2000+光谱仪记录荧光的发光强度时序图。最后得到的PtOEP的( I 0/ I 100 )-1的值为0.78,即光纤氧传感器的灵敏度为0.78,而且,斯特恩-沃尔默(Stern-Volmer)图显示出很好的线性特性。从氧气到空气环境的响应时间为24 s,从空气环境到氧气的响应时间是5 s。结果表明,基于荧光淬灭原理的光纤氧传感器具有较高的灵敏度和更快的响应时间。展开更多
A symbol is an expression of meaning,while blank symbols express special meanings.By focusing on the application of blank symbols in Japanese architecture and indoor designs,we analyzed the aesthetic principles in Jap...A symbol is an expression of meaning,while blank symbols express special meanings.By focusing on the application of blank symbols in Japanese architecture and indoor designs,we analyzed the aesthetic principles in Japanese architecture and indoor designs from the perspective of semiotics,such as“Kongji,”“Emptiness,”and“Dying out,”and their minimalist and pure design concepts.Traditional Chinese culture was also further explored,especially the profound influence of the“Chan sect”and the philosophy of“unity of heaven and mankind”on Japanese architecture and designs.This study aims to facilitate the coexistence and mutual appreciation of Chinese and Japanese architectural designs.展开更多
基金Support by National Natural Science Foundation of China(22127802,22573091)the HY Action(62402010305)。
文摘Biomass-based hydrocarbon fuels,as one of the alternatives to traditional fossil fuels,have attracted considerable attention in the energy field due to their renewability and environmental benefits.This article provides a systematic review of recent research progress in the chemical synthesis of biomass-based hydrocarbon fuels.It outlines the conversion pathways using feedstocks such as lipids,terpenoids,cellulose/hemicellulose,and lignin.Depending on the feedstock,various products with distinct structural characteristics can be prepared through reactions such as cyclization,condensation,and catalytic hydrogenation.Throughout the synthesis process,three key factors play a critical role:efficient catalyst development,production process optimization,and computational-chemistry-based molecular design.Finally,the article discusses future perspectives for biomass-based hydrocarbon fuel synthesis research.
文摘目的解析国内外食品包装设计领域研究现状、研究热点及未来发展趋势等,为行业相关从业者提供参考。方法应用CiteSpace软件,以2014年至2023年CNKI和Web of Science的核心期刊数据库作为国内外数据来源,通过文献数量、文献溯源、核心作者分析和发文机构分析、关键词共现、研究进程分析方法,进行可视化分析和综述。结果国外该领域发文数量稳步增长,欧美等国发文量较大且合作密切,中国发文量相对较少且影响力有限;国内在研究领域中注重包装设计与文化表达、材料与技术研究、用户体验与互动设计,国外更关注消费者行为、健康、新型材料和技术,以及信息传播等;国内研究从满足基础需求和功能性设计逐渐转向文化表达、用户体验与教育实践探索,国外则从早期注重消费者行为与健康导向逐渐转向后期环保材料与包装功能性的深度探索。结论食品包装设计领域在国际上呈现出较强的研究活跃度,国内仍需加强研究合作与创新。未来的研究趋势可以侧重于智能包装、可持续材料的应用,以及消费者行为的影响,这对推动食品包装设计领域的创新与可持续发展具有重要意义。
文摘基于荧光淬灭原理的光纤氧传感器一直是许多研究工作的重点。介绍了一种制作简单、成本低的光纤氧传感器制造方法。该方法基于荧光淬灭原理,在光纤末端涂覆荧光材料铂八乙基卟啉(PtOEP)实现的。传感器中荧光材料被395nm的紫光激发,并由Y形光纤引导,使用广州犀谱光电USB2000+光谱仪记录荧光的发光强度时序图。最后得到的PtOEP的( I 0/ I 100 )-1的值为0.78,即光纤氧传感器的灵敏度为0.78,而且,斯特恩-沃尔默(Stern-Volmer)图显示出很好的线性特性。从氧气到空气环境的响应时间为24 s,从空气环境到氧气的响应时间是5 s。结果表明,基于荧光淬灭原理的光纤氧传感器具有较高的灵敏度和更快的响应时间。
基金Department of Education in Yunnan Province Fund for Scientific Research,Research on the Origin Tracing of the Traditional Architectures of Limi People of Yunnan Yi Ethnic Group(No.2022Y658).
文摘A symbol is an expression of meaning,while blank symbols express special meanings.By focusing on the application of blank symbols in Japanese architecture and indoor designs,we analyzed the aesthetic principles in Japanese architecture and indoor designs from the perspective of semiotics,such as“Kongji,”“Emptiness,”and“Dying out,”and their minimalist and pure design concepts.Traditional Chinese culture was also further explored,especially the profound influence of the“Chan sect”and the philosophy of“unity of heaven and mankind”on Japanese architecture and designs.This study aims to facilitate the coexistence and mutual appreciation of Chinese and Japanese architectural designs.
