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Defects‑Rich Heterostructures Trigger Strong Polarization Coupling in Sulfides/Carbon Composites with Robust Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第1期17卷 528-547页

作者： Jiaolong liu Siyu Zhang Dan Qu Xuejiao Zhou Moxuan Yin Chenxuan Wang Xuelin Zhang sichen li Peijun Zhang Yuqi Zhou Kai Tao Mengyang li Bing Wei Hongjing Wu Mengyang li Bing Wei Hongjing Wu School of Physics Xidian UniversityXi’an 710071People’s Republic of China School of Advanced Materials and Nanotechnology State Key Discipline Laboratory of Wide Band Gap Semiconductor TechnologyXidian UniversityXi’an 710071People’s Republic of China School of Microelectronics Xidian UniversityXi’an 710071People’s Republic of China School of Telecommunication Engineering Xidian UniversityXi’an 710071People’s Republic of China MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary School of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China The Ministry of Education Key Laboratory of Micro and Nano Systems forAerospace School of Mechanical EngineeringNorthwestern PolytechnicalUniversityXi’an 710072People’s Republic of China

Defects-rich heterointerfaces integrated with adjustable crystalline phases and atom vacancies,as well as veiled dielectric-responsive character,are instrumental in electromagnetic *** methods,however,constrain their delicate ***,an innovative alternative is proposed:carrageenan-assistant cations-regulated(CACR)strategy,which induces a series of sulfides nanoparticles rooted in situ on the surface of carbon *** unique configuration originates from strategic vacancy formation energy of sulfides and strong sulfides-carbon support interaction,benefiting the delicate construction of defects-rich heterostructures in M_(x)S_(y)/carbon composites(M-CAs).Impressively,these generated sulfur vacancies are firstly found to strengthen electron accumulation/consumption ability at heterointerfaces and,simultaneously,induct local asymmetry of electronic structure to evoke large dipole moment,ultimately leading to polarization coupling,i.e.,defect-type interfacial ***“Janus effect”(Janus effect means versatility,as in the Greek two-headed Janus)of interfacial sulfur vacancies is intuitively confirmed by both theoretical and experimental investigations for the first ***,the sulfur vacancies-rich heterostructured Co/Ni-CAs displays broad absorption bandwidth of 6.76 GHz at only 1.8 mm,compared to sulfur vacancies-free CAs without any dielectric *** defects-rich heterostructures,this one-pot CACR strategy may steer the design and development of advanced nanomaterials,boosting functionality across diverse application domains beyond electromagnetic response.

关键词： Defects-rich heterointerfaces Sulfides Polarization coupling Electromagnetic wave absorption

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Multi-energy Management of Interconnected Multi-microgrid System Using Multi-agent Deep Reinforcement Learning

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Journal of Modern Power Systems and Clean Energy 2023年第5期11卷 1606-1617页

作者： sichen li Di Cao Weihao Hu Qi Huang Zhe Chen Frede Blaabjerg School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengduChina Southwest University of Science and Technology MianyangChina Department of Energy Technology Aalborg UniversityDK-9220 AalborgDenmark

The multi-directional flow of energy in a multi-microgrid(MMG) system and different dispatching needs of multiple energy sources in time and location hinder the optimal operation coordination between microgrids. We propose an approach to centrally train all the agents to achieve coordinated control through an individual attention mechanism with a deep dense neural network for reinforcement learning. The attention mechanism and novel deep dense neural network allow each agent to attend to the specific information that is most relevant to its reward. When training is complete, the proposed approach can construct decisions to manage multiple energy sources within the MMG system in a fully decentralized manner. Using only local information, the proposed approach can coordinate multiple internal energy allocations within individual microgrids and external multilateral multi-energy interactions among interconnected microgrids to enhance the operational economy and voltage stability. Comparative results demonstrate that the cost achieved by the proposed approach is at most 71.1% lower than that obtained by other multi-agent deep reinforcement learning approaches.

关键词： Interconnected multi-microgrid system energy management combined heat and power demand response deep reinforcement learning

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Shale Fracturability Graphic Template Based onMixed Analytic Hierar-chy Process andMutation Theory

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Energy Engineering 2024年第7期121卷 1921-1943页

作者： sichen li Dehua liu liang Cheng Pan Ma College of Petroleum Engineering Yangtze UniversityWuhan430100China Hubei Drilling and Recovery Engineering for Oil and Gas Key Laboratory Wuhan430100China

Due to the depletion of conventional energy reserves,there has been a global shift towards non-conventional energy *** oil and gas have emerged as key *** resources have dense and heterogeneous reservoirs,which require hydraulic fracturing to *** process depends on identifying optimal fracturing layers,also known as‘sweet spots’.However,there is currently no uniform standard for locating these sweet *** paper presents a new model for evaluating fracturability that aims to address the current gap in the *** model utilizes a hierarchical analysis approach and a mutation model,and is distinct in its use of original logging data to generate a fracturability evaluation *** this paper’s shale fracturing sweet spot evaluation method based on a two-step mutation model,four wells in different blocks of Fuling and Nanchuan Districts in China were validated,and the results showed that the proportion of high-yielding wells on the sweet spot line could reach 97.6%,while the proportion of low-producing wells was only 78.67%.Meanwhile,the evaluation results of the model were compared with the microseismic data,and the matching results were consistent.

关键词： Shale reservoir hydraulic fracturing analytic hierarchy process mutation model microseismic

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Electric Vehicle Charging Management Based on Deep Reinforcement Learning

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Journal of Modern Power Systems and Clean Energy 2022年第3期10卷 719-730页

作者： sichen li Weihao Hu Di Cao Tomislav Dragicevic Qi Huang Zhe Chen Frede Blaabjerg School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengduChina Department of Electrical Engineering Center for Electric Power and Energy Smart Electric Components Technical University of DenmarkCopenhagenDenmark Department of Energy Technology Aalborg UniversityAalborgDenmark

A time-variable time-of-use electricity price can be used to reduce the charging costs for electric vehicle(EV)*** the uncertainty of price fluctuation and the randomness of EV owner’s commuting behavior,we propose a deep reinforcement learning based method for the minimization of individual EV charging *** charging problem is first formulated as a Markov decision process(MDP),which has unknown transition probability.A modified long short-term memory(LSTM)neural network is used as the representation layer to extract temporal features from the electricity price *** deep deterministic policy gradient(DDPG)algorithm,which has continuous action spaces,is used to solve the *** proposed method can automatically adjust the charging strategy according to electricity price to reduce the charging cost of the EV *** other methods to solve the charging problem are also implemented and quantitatively compared with the proposed method which can reduce the charging cost up to 70.2%compared with other benchmark methods.

关键词： Deep reinforcement learning data-driven control uncertainty electric vehicles(EVs)

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Fabrication of 3D hollow acorn-shell-like PtBi intermetallics via a surfactant-free pathway for efficient ethylene glycol electrooxidation

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Nano Research 2023年第5期16卷 6560-6567页

作者： Tingting Wan Xin Huang sichen li Qiuyu li Xianlong Yang Zhenjie Sun Dong Xiang Kun Wang Peng li Manzhou Zhu Department of Chemistry and Center for Atomic Engineering of Advanced Materials School of Materials Science and EngineeringAnhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized MaterialsAnhui UniversityHefei 230601China Key Laboratory of Structure and Functional Regulation of Hybrid Materials Ministry of EducationAnhui UniversityHefei 230601China

The synthesis of atomically ordered Pt-based intermetallic electrocatalysts for the direct alcohol fuel cells generally requires the addition of surfactants or the high-temperature ***,some residual surfactants on the surface of the assynthesized catalysts would prevent the exposure of catalytic active sites,the high-temperature annealing process is easy to accelerate the sintering of the metal,which both lead to the decline of electrocatalytic ***,we construct the atomically ordered bimetallic PtBi intermetallics with clean surfaces and unique three-dimensional hollow acorn-shell-like structure(3D PtBi HASL)by a simple,low-temperature,surfactant-free one-pot synthetic *** from the special hollow structures,the obtained 3D PtBi HASL intermetallics expose abundant accessible active ***,the introduction of oxophilic metal Bi can enhance adsorption of OHads,thereby significantly facilitating removal of poisoned *** functional theory(DFT)simulations further indicate that formation of the PtBi intermetallic phase with the downshift of the Pt d-band center endows 3D Pt49.4Bi50.6 HASL intermetallics with significantly attenuated COads and enhanced OHads adsorption,bringing about the boosting electrocatalytic *** mass activity of the 3D Pt49.4Bi50.6 HASL intermetallics for ethylene glycol oxidation reaction is as high as 24.67 A·mgPt^(−1),which is 12.98 times higher than that of commercial Pt/C(1.90 A·mgPt^(−1)).This work may inspire the design of Pt-based intermetallics as high-efficiency anode electrocatalysts for fuel cell applications.

关键词： surfactant-free strategy PtBi intermetallic three-dimensional hollow structure electrocatalyst ethylene glycol oxidation reaction

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A Probe into the Path of Caring for Rural Children in the Era of “Internet+”

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Open Journal of Applied Sciences 2023年第1期13卷 15-23页

作者： Xingping Wang sichen li Yingchun Han Heilongjiang Bayi Agricultural University Daqing China

Education is a great cause to achieve national prosperity, national rejuvenation and people’s happiness, and an important way to block the intergenerational transmission of poverty. Rural revitalization, education first. Rural children’s education is an important issue of rural revitalization. This paper takes rural children, especially left behind children and children in distress as the help objects, and uses the advantages of “Internet plus” to improve the system, strengthen family education guidance, integrate social love resources, etc., to solve the problems faced by rural children, such as no guidance in learning, lack of guidance in behavior, lack of care in life, promote the overall healthy development of rural children, and solve the problem of rural education backwardness.

关键词： Rural Children Rural Revitalization Accompanying Reading Internet+

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MULTIPLE EQUIliBRIA IN BAROCliNIC ATMOSPHERE BY THERMAL FORCING RELATED TO SUBTROPICAL HIGH

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Science China Chemistry 1987年第11期31卷 1199-1210页

作者：刘四臣李维亮 Academy of Meteorological Sciences State Meteorology Administration Beijing

By using Lorenz’s moist general circulation model, a nonlinear and dissipative system describing atmospheric motion has been obtained in approximation of Low *** multiple equilibria and the transformation between the flow patterns of winter and summer, the latitudinal oscillation of subtropical high by thermal forcing and nonlinear interaction of general circulation are studied in this *** results show that the transformation of flow patterns is a discontinuous leaping, and is a process of resetting new flow pattern by rapid exchange inflow *** the corresponding dry model, we cannot find the latitudinal oscillation of the center of subtropical *** the moist model, after the thermal effect of water vapor is drawn into the model, nonlinear interaction appears between flow and heating *** effect helps to bring about the latitudinal oscillation of subtropical high.

关键词： high MULTIPLE EQUIliBRIA IN BAROCliNIC ATMOSPHERE BY THERMAL FORCING RELATED TO SUBTROPICAL HIGH

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破圈与再塑:数字文化产业塑造国家形象的可见性

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同济大学学报（社会科学版） 2024年第3期35卷 19-29页

作者：薛可李思晨上海交通大学上海交大南加州大学文化创意产业学院上海200240 上海交通大学媒体与传播学院上海200240

中国对外传播存在触达度低、持续性短、需求复杂、传播低效、认同度弱等难题。数字文化产业可承担文化出海、文化强国的重要使命,是塑造国家形象的重要途径。数字文化产业具有鲜明的国际化特性:国际化“语言”、大众化“融入”、触发式... 详细信息

中国对外传播存在触达度低、持续性短、需求复杂、传播低效、认同度弱等难题。数字文化产业可承担文化出海、文化强国的重要使命,是塑造国家形象的重要途径。数字文化产业具有鲜明的国际化特性:国际化“语言”、大众化“融入”、触发式“动情”、自发式“创作”。基于此,本文提出数字文化产业对外传播PMIAI模型,即从感知(perception)、激励(motivation)、兴趣(interest)、行为(action)、认同(identity)五个要素来增强国家形象塑造的可见性,再塑中国与世界的价值主张与沟通情境,强化对外传播效能。

关键词：数字文化产业国家形象对外传播 PMIAI模型

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水泥固化软土抗拉特性研究

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中南大学学报（自然科学版） 2022年第7期53卷 2619-2632页

作者：李斯臣杨俊杰武亚磊王曼中国海洋大学海洋环境与生态教育部重点实验室山东青岛266100 中国海洋大学环境科学与工程学院山东青岛266100

为探究固化土的拉伸破坏问题,利用研制的单轴拉伸试验仪研究水泥固化不同软土的抗拉特性;基于抗拉强度随灰水比(水泥与水的质量之比)和龄期的变化规律,建立双曲线形式的抗拉强度-龄期关系式。研究结果表明:抗拉强度、拉伸模量随水泥土... 详细信息

为探究固化土的拉伸破坏问题,利用研制的单轴拉伸试验仪研究水泥固化不同软土的抗拉特性;基于抗拉强度随灰水比(水泥与水的质量之比)和龄期的变化规律,建立双曲线形式的抗拉强度-龄期关系式。研究结果表明:抗拉强度、拉伸模量随水泥土的灰水比和龄期增加而增大;表征材料韧性的断裂能随龄期增加而增大,胶州湾黏土固化土断裂能随灰水比先增大后减小,而东营港粉土固化土断裂能随灰水比持续增大;水泥土的抗拉强度与无侧限抗压强度呈线性关系,其拉压比可取0.15;与其他学者的试验数据对比,所提公式的抗拉强度计算值与试验结果较吻合,能在一定程度上反映水泥固化软土抗拉强度随龄期的变化规律。

关键词：水泥固化软土抗拉特性灰水比龄期抗拉强度预测

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超高性能水泥基复合材料早期自收缩特性研究

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建筑材料学报 2014年第1期17卷 19-23页

作者：张云升张国荣李司晨东南大学江苏省土木工程材料重点实验室江苏南京211189

采用新型高精度全自动自收缩测量仪，研究了加入粗集料、不同水胶比（mw／mB=0．16，0．20，0．24）和不同钢纤维体积分数（φf=0％，1％，2％，3％）对超高性能水泥基复合材料（ultra—highperformancecementitouscomposite，UHPCC）... 详细信息

采用新型高精度全自动自收缩测量仪，研究了加入粗集料、不同水胶比（mw／mB=0．16，0．20，0．24）和不同钢纤维体积分数（φf=0％，1％，2％，3％）对超高性能水泥基复合材料（ultra—highperformancecementitouscomposite，UHPCC）自加水起33h内自收缩特性的影响．结果表明：UHPCC早期自收缩随龄期的发展具有明显的双阶段特征，即初始快速发展阶段和后期缓慢发展阶段；UHPCC早期自收缩随着水胶比的降低而增加，当水胶比从0．24分别减小到0．20，0．16时，0～20h内其自收缩值分别增加了34．09／6和63．8％；粗集料和钢纤维对UHPCC早期自收缩有明显的抑制作用，钢纤维体积分数从0％分别增至1％，2％和3％时，0～33h内其自收缩值分别降低了23．9％，60．5％，86．5％；UHPCC在33h时的自收缩值与水胶比（≤0．24）、钢纤维体积分数（0％～3％）这两者的关系均近似呈线性相关．

关键词：超高性能水泥基复合材料早期自收缩水胶比钢纤维体积分数

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