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High Sensitivity Gas Sensor Based on IR Spectroscopy Technology and Application

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Photonic Sensors 2016年第2期6卷 127-131页

作者： hengyi li Department of Electronic Information Engineering Jincheng College of Sichuan University 611731 Chengdu China

Due to extremely effective advantages of the quantum cascade laser spectroscopy and technology for trace gas detection, this paper presents spectroscopy scanning, the characteristics of temperature tuning, system resolution, sensitivity, and system stability with the application of the presented gas sensor. Experimental results showed that the sensor resolution was 〈0.01cm-1 （equivalent to 0.06nm）, and the sensor sensitivity was at the level of 194 ppb with the application of HzCO measurement.

关键词： Quantum cascade laser IR spectroscopy high sensitivity formaldehyde

New framework of low-carbon city development of China:Underground space based integrated energy systems

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Underground Space 2024年第1期14卷 300-318页

作者： Boyu Qin hengyi li Zhaojian Wang Yuan Jiang Dechun Lu Xiuli Du Qihu Qian Xi’an Jiaotong University Xi’an 710049China Shanghai Jiaotong University Shanghai 200240China Center for Strategic Studies Chinese Academy of EngineeringBeijing 100088China Beijing University of Technology Beijing 100124China Army Engineering University Nanjing 210007China

Cities play a vital role in social development,which contribute to more than 70%of global carbon ***-carbon city construction and decarbonization of the energy sector are the critical strategies to cope with the increasingly serious climate change problems,and low-carbon technologies have attracted extensive ***,the potential of such technologies to reduce carbon emissions is constrained by various factors,such as space,operational environment,and safety *** an essential territorial natural resource,underground space can provide large-scale and stable space support for existing low-carbon *** underground space and low-carbon technologies could be a promising approach towards carbon neutrality,and hence,warrants further ***,a comprehensive review of the existing low-carbon technologies including the technical bottlenecks is ***,the features of underground space and its low carbon potential are ***,a framework for the underground space based integrated energy system is proposed,including system configuration,operational mechanisms,and the resulting ***,the research prospect and key challenges required to be settled are highlighted.

关键词： Underground space Low-carbon city Integrated energy system Carbon neutrality

Chemical simulation teaching system based on virtual reality and gesture interaction

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虚拟现实与智能硬件（中英文） 2024年第2期6卷 148-168页

作者： Dengzhen LU hengyi li Boyu QIU Siyuan liU Shuhan QI School of Computer Science and Technology Harbin Institute of TechnologyShenzhen 518055China Pengcheng Laboratory Shenzhen 518052China

Background Most existing chemical experiment teaching systems lack solid immersive experiences,making it difficult to engage *** address these challenges,we propose a chemical simulation teaching system based on virtual reality and gesture *** The parameters of the models were obtained through actual investigation,whereby Blender and 3DS MAX were used to model and import these parameters into a physics *** establishing an interface for the physics engine,gesture interaction hardware,and virtual reality(VR)helmet,a highly realistic chemical experiment environment was *** code script logic,particle systems,as well as other systems,chemical phenomena were ***,we created an online teaching platform using streaming media and databases to address the problems of distance *** The proposed system was evaluated against two mainstream products in the *** the experiments,the proposed system outperformed the other products in terms of fidelity and *** The proposed system which offers realistic simulations and practicability,can help improve the high school chemistry experimental education.

关键词： Chemical experiment simulation Gesture interaction Virtual reality Model establishment Process control Streaming media Database

Rational Design of a Cadmium Responsive living Sensor

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Rational Design of a Cadmium Responsive Living Sensor

A novel dopant for spiro-OMeTAD towards efficient and stable perovskite solar cells

中国生物化学与分子生物学会第十二届全国会员代表大会暨2018年全国学术会议

作者： hengyi li Changsheng Zhang Luhua Lai College of Chemistry and Molecular Engineering Peking University

The construction of metal-binding sites into designed protein scaffolds is an ultimate test of our understanding of structurefunction relationships and it will eventually allow us to construct new proteins for biochemistry and biotechnology applications and biological *** negative effects of cadmium ion(Cd)exposure on human health have been recognized for many ***,new technologies that can sequester and remediate cadmium efficiently from dilute

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Science China Materials 2021年第12期64卷 2915-2925页

作者： Zhipeng lin Jing li hengyi li Yanping Mo Junye Pan Chao Wang Xiao-li Zhang Tongle Bu Jie Zhong Yi-Bing Cheng Fuzhi Huang Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Energy Materials and Surface Sciences Unit Okinawa Institute of Science and Technology Graduate UniversityOkinawa 904-0495Japan

2,2’,7,7’-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9’-spirobifluorene(spiro-OMeTAD), as the most commonly used hole transport material(HTM), plays a significant role in the normal structured(n-i-p) high-efficiency perovskite solar cells(PSCs). In general, it is prepared by a halogen solvent(chlorobenzene, CBZ) and needs an ion dopant(lithium bis(trifluoromethanesulfonyl)imide, li-TFSI) to improve its conductivity and hole mobility. However, such a halogen solvent is not environmentally friendly and the widely used liTFSI dopant would affect the stability of PSCs. Herein, we develop a non-halogen solvent-tetrahydrofuran(THF)-prepared spiro-OMeTAD solution with a new p-type dopant,potassium bis(fluorosulfonyl)imide(K-FSI), to apply into PSCs. By this strategy, high-hole-mobility spiro-OMeTAD film is achieved. Meanwhile, the potassium ions introduced by diffusion into perovskite surface passivate the interfacial defects. Therefore, a hysteresis-free champion PSC with an efficiency of 21.02% is obtained, along with significantly improved stability against illumination and ambient conditions. This work provides a new strategy for HTMs toward hysteresis-free high-efficiency and stable PSCs by substituting dopants.

关键词： perovskite solar cells spiro-OMeTAD K-FSI hysteresis-free

河南粮食核心区建设中资源禀赋优势逆转与对策——基于粮食综合生产能力视角

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中国农业资源与区划 2012年第3期33卷 39-44页

作者：李素琴李烆一河南大学产业经济与农村发展研究所中国农业大学理学院化学系

河南农村剩余劳动力在粮食生产核心区建设中出现了要素禀赋优势逆转,即劳动力资源的短缺导致了粮食核心区建设与区域经济发展争夺劳动力资源的矛盾,土地的稀缺性导致了城镇化和工业化发展与粮食生产核心区建设在空间和区域上争夺土地资... 详细信息

河南农村剩余劳动力在粮食生产核心区建设中出现了要素禀赋优势逆转,即劳动力资源的短缺导致了粮食核心区建设与区域经济发展争夺劳动力资源的矛盾,土地的稀缺性导致了城镇化和工业化发展与粮食生产核心区建设在空间和区域上争夺土地资源的矛盾,这些因素制约了粮食生产能力。文章提出了引导投入务工与务农劳动力结构比例、妥善处理土地开发和保护耕地关系、以市场手段改善农业基础设施等具体建议。

关键词：农业劳动力过度转移资源禀赋优势逆转粮食核心区建设粮食生产能力河南省

基于人工结构板的声贝塞尔束的相位调控(特邀)

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光子学报 2022年第1期51卷 207-215页

作者：罗立成李恒毅柯满竹刘正猷武汉大学物理科学与技术学院武汉430072

理论及数值模拟了人工结构板对声贝塞尔束相位拓扑阶数的灵活调控。基于惠更斯原理推导了平面波及贝塞尔束入射到刻有镂空阿基米德螺旋栅的金属板后出射波的声场分布。结果表明,当平面波从结构板的正反两向入射时,可分别得到带相反拓扑... 详细信息

理论及数值模拟了人工结构板对声贝塞尔束相位拓扑阶数的灵活调控。基于惠更斯原理推导了平面波及贝塞尔束入射到刻有镂空阿基米德螺旋栅的金属板后出射波的声场分布。结果表明,当平面波从结构板的正反两向入射时,可分别得到带相反拓扑阶数的贝塞尔束;当贝塞尔束从结构板的正反两向入射时,可获得升阶或降阶的出射贝塞尔束。数值模拟声场分布对理论分析进行验证,进一步发现,升高工作频率至人工结构板对应基频的倍数,会得到对入射波高倍数相位阶数的调控。本文提出的贝塞尔束声场调控方法有望推动轨道角动量在信息传递及编解码中的应用。

关键词：声贝塞尔束声人工结构板相位调控角动量拓扑荷

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基于海绵城市的北京市巨灾洪水防御体系设计

人民黄河 2016年第7期38卷 35-38页

作者：李恒义孟琳琳北京市水利规划设计研究院北京100048

针对北京市防洪排涝体系中存在防御巨灾洪水能力不足的问题,结合海绵城市理念,提出基于系统分析方法的北京市巨灾洪水防御体系的设计框架。巨灾洪水防御体系设计过程在系统总体框架下,分别设计了防洪排涝基础设施系统、生命线保障系统... 详细信息

针对北京市防洪排涝体系中存在防御巨灾洪水能力不足的问题,结合海绵城市理念,提出基于系统分析方法的北京市巨灾洪水防御体系的设计框架。巨灾洪水防御体系设计过程在系统总体框架下,分别设计了防洪排涝基础设施系统、生命线保障系统和应急管理系统,并设定了各子系统间的"激发—响应"关系,引导信息准确、高效传递,形成完整闭合的巨灾洪水防御信息流程,并指导基础设施系统和生命线保障系统的升级和完善,更加合理地配置应急资源与措施,全面提高北京市抵御巨灾洪水的能力。

关键词：巨灾洪水防御体系海绵城市北京市

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南京地铁1号线屏蔽门与信号系统接口探析

现代城市轨道交通 2014年第1期 71-74页

作者：黎恒义南京地铁工程管理部工程师江苏南京210012

简要阐述南京地铁1号线屏蔽门与信号系统之间的接口功能要求,屏蔽门控制原理及接口功能的实现,屏蔽门的安全应用,以及屏蔽门系统的操作模式。

关键词：地铁屏蔽门信号系统接口探析