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Manipulating photogenerated electron flow in nickel single‐atom catalysts for photocatalytic CO_(2)reduction into tunable syngas

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Carbon Energy 2024年第8期6卷 205-213页

作者： Yida Zhang Qingyu Wang lihui Wu Haibin Pan Chengyuan Liu Yue Lin Gongming Wang Xusheng Zheng National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefeiAnhuiChina College of Chemistry and Materials Science University of Science and Technology of ChinaHefeiAnhuiChina Department of Chemistry Hefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefeiAnhuiChina

The key to designing photocatalysts is to orient the migration of photogenerated electrons to the target active sites rather than dissipate at inert ***,we demonstrate that the doping of phosphorus(P)significantly enriches photogenerated electrons at Ni active sites and enhances the performance for CO_(2)reduction into *** photocatalytic CO_(2)reduction,Ni single‐atom‐anchored P‐modulated carbon nitride showed an impressive syngas yield rate of 85μmol gcat^(−1)h^(−1)and continuously adjustable CO/H_(2)ratios ranging from 5:1 to 1:2,which exceeded those of most of the reported carbon nitride‐based single‐atom *** studies reveal that P doping improves the conductivity of catalysts,which promotes photogenerated electron transfer to the Ni active sites rather than dissipate randomly at low‐activity nonmetallic sites,facilitating the CO_(2)‐to‐syngas photoreduction process.

关键词： carbon nitride CO_(2)photoreduction electron flow Ni single atoms syngas

Automatic Generation Control in a Distributed Power Grid Based on Multi-step Reinforcement Learning

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Protection and Control of Modern Power Systems 2024年第4期9卷 39-50页

作者： Wenmeng Zhao Tuo Zeng Zhihong Liu lihui Xie Lei Xi Hui Ma the Electric Power Research Institute Southern Power GridGuangzhou 510663China the Heyuan Power Supply Bureau Guang-dong Power Grid Co.Ltd.Heyuan 517000China the College of Electrical Engineering&New Energy China Three Gorges UniversityYichang 443002China the College of Electrical Engineering&New Energy and Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station China Three Gorges UniversityYichang 443002China IEEE

The increasing use of renewable energy in the power system results in strong stochastic disturbances and degrades the control performance of the distributed power *** this paper,a novel multi-agent collaborative reinforcement learning algorithm is proposed with automatic optimization,namely,Dyna-DQL,to quickly achieve an optimal coordination solution for the multi-area distributed power *** proposed Dyna framework is combined with double Q-learning to collect and store the environmental *** can iteratively update the agents through buffer replay and real-time *** the environmental data can be fully used to enhance the learning speed of the *** mitigates the negative impact of heavy stochastic disturbances caused by the integration of renewable energy on the control *** are conducted on two different models to validate the effectiveness of the proposed *** results demonstrate that the proposed Dyna-DQL algorithm exhibits superior stability and robustness compared to other reinforcement learning algorithms.

关键词： Automatic generation control Dyna framework distributed power grid multi-agent mod-el-based reinforcement learning

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城镇保障性安居工程资金绩效审计目标和内容

审计研究 2014年第4期 14-18页

作者：蒋超博朱立辉审计署驻昆明特派员办事处

城镇保障性安居工程是一项惠民政策,随着我国对该项工程投入的逐年增加,这项工程资金的管理和使用已经引起社会普通关注,对该资金进行绩效审计也已成当务之需。为了更好对城镇保障性安居工程资金进行绩效审计,围绕"合规性、公平性、经... 详细信息

城镇保障性安居工程是一项惠民政策,随着我国对该项工程投入的逐年增加,这项工程资金的管理和使用已经引起社会普通关注,对该资金进行绩效审计也已成当务之需。为了更好对城镇保障性安居工程资金进行绩效审计,围绕"合规性、公平性、经济性、效率性和效果性"绩效审计目标,重点关注保障房资金筹集、管理和使用,建设管理,项目建设基本情况,目标任务分解和完成情况,住房分配情况,配套支持政策执行情况,信息系统建设等七个方面内容,并结合我国的国情和保障房实践经验提出了应从完善法律法规、建立指标评价系统、完善公告制度等方面来完善保障房资金绩效审计和提高绩效审计结果利用效果。

关键词：安居工程绩效审计目标内容

PWM逆变器中新型共磁芯滤波器的设计与应用

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电力自动化设备 2016年第2期36卷 65-70页

作者：王晓远吕海英祝黎辉天津大学电气与自动化工程学院天津300072

LCL无源滤波器常与逆变器串联用来抑制逆变器产生的开关频率附近的高次电流谐波。为了降低无源滤波器的成本和体积,提出一种新型的应用于LCL滤波器的共磁芯电感,即网侧电感与逆变器侧电感共用1个磁芯。这种结构的滤波电感与独立结构的LC... 详细信息

LCL无源滤波器常与逆变器串联用来抑制逆变器产生的开关频率附近的高次电流谐波。为了降低无源滤波器的成本和体积,提出一种新型的应用于LCL滤波器的共磁芯电感,即网侧电感与逆变器侧电感共用1个磁芯。这种结构的滤波电感与独立结构的LCL滤波电感相比体积更小、成本更低且具有较好的滤波效果。理论推导与仿真实验结果验证了新型滤波电感的有效性。

关键词：滤波器 LCL滤波器 PWM 逆变器共磁芯电感谐波抑制

Defects evolution in n-type 4H-SiC induced by electron irradiation and annealing

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Journal of Semiconductors 2024年第7期45卷 77-83页

作者： Huifan Xiong Xuesong Lu Xu Gao Yuchao Yan Shuai Liu lihui Song Deren Yang Xiaodong Pi State Key Laboratory of Silicon and Advanced Semiconductor Materials&School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Key Laboratory of Power Semiconductor Materials and Devices of Zhejiang Province&Institute of Advanced Semiconductors ZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 311200China

Radiation damage produced in 4H-SiC by electrons of different doses is presented by using multiple characterization techniques. Raman spectra results indicate that SiC crystal structures are essentially impervious to 10 Me V electron irradiation with doses up to 3000 kGy. However, irradiation indeed leads to the generation of various defects, which are evaluated through photoluminescence(PL) and deep level transient spectroscopy(DLTS). The PL spectra feature a prominent broad band centered at 500 nm, accompanied by several smaller peaks ranging from 660 to 808 nm. The intensity of each PL peak demonstrates a linear correlation with the irradiation dose, indicating a proportional increase in defect concentration during irradiation. The DLTS spectra reveal several thermally unstable and stable defects that exhibit similarities at low irradiation ***, after irradiating at the higher dose of 1000 kGy, a new stable defect labeled as R_(2)(Ec-0.51 eV) appeared after annealing at 800 K. Furthermore, the impact of irradiation-induced defects on SiC junction barrier Schottky diodes is discussed. It is observed that high-dose electron irradiation converts SiC n-epilayers to semi-insulating layers. However, subjecting the samples to a temperature of only 800 K results in a significant reduction in resistance due to the annealing out of unstable defects.

关键词： 4H-SiC deep level transient spectroscopy(DLTS) photoluminescence(PL) defects

Post-disaster spatial reconstruction from the perspective of a rural settlement niche in the upper reaches of the Minjiang River

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Journal of Mountain Science 2024年第5期21卷 1630-1646页

作者： LIU Yanguo WANG Li ZOU Qiang LI Jingji LU Yafeng LI Lin XU Binni WANG lihui Tianfu Institute of Research and Innovation Southwest University of Science and TechnologyChengdu 610299China Mianyang Science and Technology City Division the National Remote Sensing Center of ChinaSouthwest University of Science and TechnologyMianyang 621010China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610299China State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection(Chengdu University of Technology) Chengdu 610059China Tianfu New Area Park City Construction Bureau Chengdu Municipal Bureau of Planning and Nature ResourcesChengdu 610218China

Post-disaster recovery and reconstruction provide an effective way to reduce the disaster vulnerability of, and promote leapfrog development in, an affected area. To date, studies that have used administrative boundaries to investigate the reconstruction of settlement space have not been able to clearly define the real boundaries of land use changes or quantify the degree of response to the ‘Build-Back-Better’ initiative, and have lacked any consideration of the fourth reconstruction stage–development period(10 years). This study constructed a mountain settlement niche and analyzed the characteristics, spatial reconstruction, and drivers of rural settlements during 2009–2019 in the upper reaches of the Minjiang River, southwest China. The results showed the following:(1) Natural factors were the basis for the formation and development of mountain settlement niches. The scale of the settlement niche and its land use structure depended on the physical geography features and the ethnic farming and grazing traditions. The settlement niche provided a realistic boundary for the spatial reconstruction.(2) The layout of residential land around cropland was the common feature of the mountain settlement niche. Of all the land use types, the roads and rural residential lands showed the most change over the 10 years;13,860 residential patches increased in size and 4,742 patches were abandoned.(3) The area of orchards, planted to reconstruct the economy in the mountains, increased by nearly 2.5 times.(4) Collapses, landslides, and debris flow disasters and the ecological red line influenced the spatial reconstruction. While the main focus of post-disaster recovery is spatial reconstruction, initiatives should include economic and spiritual recovery, and should also achieve sustainable development of the region.

关键词： Rural settlements Spatial reconstruction Settlement niche Post-Wenchuan Earthquake Reconstruction Southwest China

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介电弹性体材料机械能-电能转换特性

农业机械学报 2010年第9期41卷 194-198页

作者：鄂世举朱喜林曹建波朱黎辉惠安峰浙江师范大学工学院金华321004 吉林大学机械科学与工程学院长春130025

介电弹性体功能材料是具有优异性能的电场活化聚合物,可在驱动和发电两种模式下工作。依据介电弹性体薄膜材料的结构特征,分析了发电模式下介电弹性体材料发电的基本机理,即可变电容原理;建立了该材料的理论模型,得到麦克斯韦效应可作... 详细信息

介电弹性体功能材料是具有优异性能的电场活化聚合物,可在驱动和发电两种模式下工作。依据介电弹性体薄膜材料的结构特征,分析了发电模式下介电弹性体材料发电的基本机理,即可变电容原理;建立了该材料的理论模型,得到麦克斯韦效应可作为压电效应处理的结果,并确定了对应压电效应的等效参数。通过仿真及实验分析了该材料的电能转换过程;分析了发电过程中电场与材料弹性回复力之间的关系,及其对发电效率的影响,确定了介电弹性体薄膜材料的发电周期过程。

关键词：介电弹性体发电转换特性仿真实验

《中华民国省区全志·河南省志》与《分省地志·河南》研究

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上海地方志 2018年第3期 80-87,96页

作者：朱丽晖复旦大学历史学系

白眉初所著《中华民国省区全志·河南省志》和吴世勋所著《分省地志·河南》是20世纪20年代河南省的两部代表性地志。这两部志书与其他志书相比,不仅保存了若干重要史料,而且作者都非常重视与外国之关系,尽力展现外国对中国的各种影响,... 详细信息

白眉初所著《中华民国省区全志·河南省志》和吴世勋所著《分省地志·河南》是20世纪20年代河南省的两部代表性地志。这两部志书与其他志书相比,不仅保存了若干重要史料,而且作者都非常重视与外国之关系,尽力展现外国对中国的各种影响,具有鲜明的时代特色。在志书的纂修过程中,作者都将自己的职业身份融入志书编纂,描绘国家概况,反映民生疾苦,体现了浓厚的家国情怀。这两部志书可以说是当时地志编纂的一股清流,既可以满足普通民众对地方基本情况的了解,又可以为专家学者在研究上提供重要的参考。

关键词：白眉初吴世勋《中华民国省区全志·河南省志》《分省地志·河南》

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国外社会主义国家政党建设的经验及挑战

重庆理工大学学报（社会科学） 2017年第9期30卷 113-122页

作者：朱丽卉兰州财经大学马克思主义学院兰州730101 中国社会科学院马克思主义学院北京102488

通过对除中国外的世界上其余4个社会主义国家的执政党——古巴共产党、朝鲜劳动党、越南共产党、老挝人民革命党——的政党建设进行梳理,发现这4个马克思主义政党之所以能在苏东剧变之后顶住压力继续发展社会主义,是因为在党的建设方面... 详细信息

通过对除中国外的世界上其余4个社会主义国家的执政党——古巴共产党、朝鲜劳动党、越南共产党、老挝人民革命党——的政党建设进行梳理,发现这4个马克思主义政党之所以能在苏东剧变之后顶住压力继续发展社会主义,是因为在党的建设方面均加强了党的思想和作风建设、发展党内民主、坚持和维护党的阶级基础和群众基础。但是,它们目前也面临着执政的共性挑战,即:丧失共产主义信仰、主流意识形态被排挤、腐败现象严重、官僚主义盛行、脱离人民群众等。

关键词：党的建设党内民主群众基础发展经济