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Molecular packing tuning via chlorinated end group enables efficient binary organic solar cells over 18.5%

Carbon Energy 2024年第3期6卷 196-203页

作者： Yafeng li.zhenyu Chen Xingzheng Yan Ziyi Ge Zhejiang Business Technology Institute NingboZhejiangChina Zhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

Designing novel nonfullerene acceptors(NFAs)is of vital importance for the development of organic solar cells(OSC).Modification on the side chain and end group are two powerful tools to construct efficient ***,based on the high-performance L8BO,we selected 3-ethylheptyl to substitute the inner chain of 2-ethylhexyl,obtaining the backbone of *** we introduced different halogen atoms of fluorine and chlorine on 2-(3-oxo-2,3-dihydro-1Hinden-1-yli.ene)malononitrile end group(EG)to construct efficient NFAs named BON3-F and BON3-Cl,*** donor D18 was chosen to combine with two novel NFAs to construct OSC ***,D18:BON3-Cl-based device shows a remarkable power conversion efficiency(PCE)of 18.57%,with a high open-circuit voltage(V_(OC))of 0.907 V and an excellent fill factor(FF)of 80.44%,which is one of the highest binary PCE of devices based on D18 as the ***,BON3-F-based device shows a relatively lower PCE of 17.79%with a decreased FF of 79.05%.The better photovoltaic performance is mainly attributed to the red-shifted absorption,higher electron and hole mobili.ies,reduced charge recombination,and enhanced molecular packing in the D18:BON3-Cl ***,we performed stabili.y tests on two binary systems;the D18:BON3-Cl and D18:BON3-F devices maintain 88.1%and 85.5%of their initial efficiencies after 169 h of storage at 85°C in an N2-filled glove box,*** work demonstrates the importance of selecting halogen atoms on EG and provides an efficient binary system of D18:BON3-Cl for further improvement of PCE.

关键词： binary organic solar cell chlorinated end group molecular packing

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An Adaptive Strategy-incorporated Integer Genetic Algorithm for Wind Farm Layout Optimization

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Journal of Bionic Engineering 2024年第3期21卷 1522-1540页

作者： Tao Zheng Haotian li.Houtian He zhenyu Lei Shangce Gao Faculty of Engineering University of ToyamaToyama9300887Japan

Energy issues have always been one of the most significant concerns for scientists *** the ongoing over exploitation and continued outbreaks of wars,traditional energy sources face the threat of *** energy is a readily available and sustainable energy *** farm layout optimization problem,through scientifically arranging wind turbines,significantly enhances the efficiency of harnessing wind ***-heuristic algorithms have been widely employed in wind farm layout *** paper introduces an Adaptive strategy-incorporated Integer Genetic Algorithm,referred to as AIGA,for optimizing wind farm layout *** adaptive strategy dynamically adjusts the placement of wind turbines,leading to a substantial improvement in energy utili.ation efficiency within the wind *** this study,AIGA is tested in four different wind conditions,alongside four other classical algorithms,to assess their energy conversion efficiency within the wind *** results demonstrate a notable advantage of AIGA.

关键词： Wind farm layout optimization problem Meta-heuristic algorithms Adaptive Integer genetic algorithm

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Single-atom Zn confined in hierarchical hollow microstructure as an acid/base-resistant microwave absorption materials

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Nano Research 2024年第8期17卷 6785-6794页

作者： Yue Lou Jiao li.Xiaokun li.zhenyu Zhu Zhan Shi Biao Xu School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

Developing acid/base-resistant and low-price microwave-absorbing materials with li.hter weight is highly desired for practical appli.ations in extreme ***,we demonstrate the successful synthesis of the N-doped porous carbon(NC)material with hierarchical pore structure by the spray pyrolysis *** large specific surface area(SBET=707.53 m^(2)·g^(−1))of materials enables multiple scattering of incident electromagnetic waves,and N doping greatly enhances the electrical conductivity of the ***,single-atom Zn can adjust the local electronic structure of adjacent sites such as carbon and nitrogen atoms,induce the center of polarization,and thus change the dielectric and electronic properties of the host *** porous carbon coating of single-atom Zn avoids the deterioration of electromagnetic parameters caused by the accumulation of magnetic particles under high-temperature *** the same time,they can also be used in various complex environments,such as acidic and basic ***,NC-1000,with high surface area,low density,and good chemical stabili.y,obtained a minimum reflection loss(RLmin)of−50.5 dB and an effective absorption bandwidth(EAB)exceeding 5.1 GHz at the thickness of 1.9 *** soaking in the strong acid and base solution,the electromagnetic wave absorption performance of the material decreased by<15%.Widely available raw materials and a simple preparation scheme are expected to expedite industrial mass production for this novel type of materials.

关键词： hierarchical hollow microstructure microwave absorption metal-organic framework(MOF) impedance matching singleatom Zn acid/base-resistant

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Dynamic optimal allocation of energy storage systems integrated within photovoltaic based on a dual timescale dynamics model

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Global Energy Interconnection 2024年第4期7卷 415-428页

作者： Kecun li.zhenyu Huang Youbo li. Yaser Qudaih Junyong li. College of Electrical Engineering Sichuan UniversityChengdu 610065P.R.China Department of Electrical engineering Higher Colleges of TechnologyAbu DhabiUAE

Energy storage systems(ESSs)operate as independent market participants and collaborate with photovoltaic(PV)generation units to enhance the flexible power supply capabili.ies of PV ***,the dynamic variations in the profitabili.y of ESSs in the electricity market are yet to be fully *** study introduces a dual-timescale dynamics model that integrates a spot market clearing(SMC)model into a system dynamics(SD)model to investigate the profit-aware capacity growth of ESSs and compares the profitabili.y of independent energy storage systems(IESSs)with that of an ESS integrated within a PV(PV-ESS).Furthermore,this study aims to ascertain the optimal allocation of the ***,SD and SMC models were set ***,the SMC model simulated on an hourly timescale was incorporated into the SD model as a subsystem,a dual-timescale model was ***,a development simulation and profitabili.y analysis was conducted from 2022 to 2040 to reveal the dynamic optimal range of PV-ESS ***,negative electricity prices were considered during clearing *** simulation results revealed differences in profitabili.y and capacity growth between IESS and PV-ESS,helping grid investors and poli.ymakers to determine the boundaries of ESSs and dynamic optimal allocation of PV-ESSs.

关键词： Optimal allocation Profitabili.y analysis Photovoltaic Energy storage system Dual timescale dynamics model Spot market clearing

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Enriched Constant Elements in the Boundary Element Method for Solving 2D Acoustic Problems at Higher Frequencies

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Computer Modeli.g in Engineering & Sciences 2024年第3期138卷 2159-2175页

作者： Zongli. li.zhenyu Gao Yijun li. School of Astronautics Harbin Institute of TechnologyHarbin150001China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen518055China

The boundary element method(BEM)is a popular method for solving acoustic wave propagation problems,especially those in exterior domains,owing to its ease in handli.g radiation conditions at ***,BEM models must meet the requirement of 6–10 elements per wavelength,using the conventional constant,li.ear,or quadratic ***,a large storage size of memory and long solution time are often needed in solving higher-frequency *** this work,we propose two new types of enriched elements based on conventional constant boundary elements to improve the computational efficiency of the 2D acoustic *** first one uses a plane wave expansion,which can be used to model scattering *** second one uses a special plane wave expansion,which can be used tomodel radiation *** examples are investigated to showthe advantages of the enriched *** with the conventional constant elements,the new enriched elements can deli.er results with the same accuracy and in less computational *** improvement in the computational efficiency is more evident at higher frequencies(with the nondimensional wave numbers exceeding 100).The paper concludes with the potential of our proposed enriched elements and plans for their further improvement.

关键词： Enriched boundary elements constant elements 2D acoustic problems higher frequency

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Rubber-based agroforestry systems modify the soil fungal composition and function in Southwest China

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Soil Ecology Letters 2024年第3期6卷 97-107页

作者： zhenyu Hong Xinai li.Debao li.Jianping Wu Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Institute of BiodiversitySchool of Ecology and Environmental ScienceYunnan UniversityKunming 650500China Laboratory of Soil Ecology and Health in Universities of Yunnan Province Yunnan UniversityKunming 650500China Dali.University Dali 671003China

Rubber-based agroforestry systems have been recognized as a practical and sustainable solution to promote the development of agriculture and the ***,interactions between fungal communities and these systems are still not sufficiently *** this study,we compared the abundance,diversity,and community composition of soil fungi in four treatments,including rubber monoculture and three rubber-based agroforestry treatments involving intercropping with Camelli. sinensis,Coffea li.erica,and Theobroma *** results revealed that the community composition exhibited significant variation between the four different treatments,while the overall soilα-diversity was relatively stable across all *** pH and soil organic carbon were significantly related to the structure of the fungal *** particular,the complexity of the functional fungal network increased in response to agroforestry treatments,promoting beneficial fungi and suppressing certain plant *** results suggest that rubber-based agroforestry systems can promote the health of soil microbial community composition,and therefore provide an effective approach to enhancing soil quali.y.

关键词： agroforestry system with intercropping rubber monoculture fungal community fungal function tropical forest

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A guidance strategy for rendezvous and docking to the space station in the Earth-Moon NRHO orbit

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中国空间科学技术（中英文） 2024年第4期44卷 29-39页

作者： XIE Yongchun CHEN Changqing li.Xiangyu li.zhenyu Beijing Institute of Control Engineering Beijing 100094China School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

With the development of space technology,it is possible to build a space station in Earth-Moon space as a transit for Earth-Moon round-trip and entering in the deep *** and docking is one of the key technologies for building an Earth-Moon space station.A guidance strategy for rendezvous and docking from the Earth orbit to the space station in the Earth-Moon NRHO orbit is proposed in this paper,which is suitable for engineering ***,the rendezvous and docking process is divided into three sections,i.e.,the large-range orbit transfer section,far-range guidance section,and close-range approaching *** suitable terminal of large-range orbit transfer is selected according to the eigenvalue of NRHO orbit state transition *** two-impulse guidance method based on the relative motion equation in the three-body problem is adopted for the far-range guidance *** impulse time and ampli.ude are solved with the optimization *** li.ear constant three-body relative motion equation is proposed for the close-range approaching section,and the rendezvous and docking is completed by a two-stage li.ear ***,a simulation analysis is carried out,and the simulation results show that the adopted dynamics equations and the designed guidance law are effective,and the three fli.ht phases are naturally connected to accompli.h the rendezvous and docking mission from the Earth orbit to the space station on the Earth-Moon NRHO.

关键词： Earth-Moon space station rendezvous and docking NRHO orbit relative motion guidance strategy

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Deep Learning Social Network Access Control Model Based on User Preferences

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Computer Modeli.g in Engineering & Sciences 2024年第7期140卷 1029-1044页

作者： Fangfang Shan Fuyang li.zhenyu Wang Peiyu Ji Mengyi Wang Huifang Sun School of Computer Science Zhongyuan University of TechnologyZhengzhou450007China Henan Key Laboratory of Cyberspace Situation Awareness Zhengzhou450001China

A deep learning access controlmodel based on user preferences is proposed to address the issue of personal privacy leakage in social ***,socialusers andsocialdata entities are extractedfromthe social networkandused to construct homogeneous and heterogeneous ***,a graph neural networkmodel is designed based on user daily social behavior and daily social data to simulate the dissemination and changes of user social preferences and user personal preferences in the social ***,high-order neighbor nodes,hidden neighbor nodes,displayed neighbor nodes,and social data nodes are used to update user nodes to expand the depth and breadth of user ***,a multi-layer attention network is used to classify user nodes in the homogeneous graph into two classes:allow access and deny *** fine-grained access control problem in social networks is transformed into a node classification problem in a graph neural *** model is vali.ated using a dataset and compared with other methods without losing *** model improved accuracy by 2.18%compared to the baseli.e method GraphSAGE,and improved F1 score by 1.45%compared to the baseli.e method,verifying the effectiveness of the model.

关键词： Graph neural networks user preferences access control social network

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Distributed Event-triggered Control for Frequency Restoration in Islanded Microgrids with Reduced Trigger Condition Checking

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CSEE Journal of Power and Energy Systems 2024年第5期10卷 2156-2165页

作者： Yuli. Chen Dongli.n Qi Zhenming li.zhenyu Wang Xinyi Yang Jianli.ng Zhang College of Electrical Engineering Zhejiang UniversityHangzhou 310027China

For islanded microgrids(MGs),distributed control is regarded as a preferred alternative to centrali.ed control for the frequency restoration of ***,distributed control with successive communication restricts the efficiency and resili.nce of the control *** address this issue,this paper proposes a distributed event-triggered control strategy for the frequency secondary control in islanded *** proposed event-triggered control is Zeno behavior free and enables each DG to update and propagate its state to neighboring DGs only when a specific“event”occurs,which significantly reduces the communication *** with the existing event-triggered control,a trigger condition checking period of the proposed event-triggered control is provided to reduce the computation burden when checking the trigger ***,using the aperiodicity and intermittent properties of the communication,a simple detection principle is proposed to detect and isolate the compromised communication li.ks in a timely and economic fashion,which improves the resili.nce of the system against FDI ***,the control effectiveness of the proposed control scheme is vali.ated by the simulation results of the tests on an MG with 4 DGs.

关键词： Distributed control event-triggered control islanded microgrid secondary control

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A dual adaptive unscented Kalman filter algorithm for SINS-based integrated navigation system

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Journal of Systems Engineering and Electronics 2024年第3期35卷 732-740页

作者： LYU Xu MENG Ziyang li.Chunyu CAI zhenyu HUANG Yi li.Xiaoyong YU Xingkai Department of Precision Instrument Tsinghua UniversityBeijing 100084China College of Mechanical and Power Engineering Three Gorges UniversityYichang 443002China Unit 91001 of the PLA Beijing 100161China School of Control and Computer Engineering North China Electric Power UniversityBeijing 100096China

In this study, the problem of measuring noise pollution distribution by the intertial-based integrated navigation system is effectively suppressed. Based on nonli.ear inertial navigation error modeli.g, a nested dual Kalman filter framework structure is developed. It consists of unscented Kalman filter (UKF)master filter and Kalman filter slave filter. This method uses nonli.ear UKF for integrated navigation state estimation. At the same time, the exact noise measurement covariance is estimated by the Kalman filter dependency filter. The algorithm based on dual adaptive UKF (Dual-AUKF) has high accuracy and robustness, especially in the case of measurement information interference. Finally, vehicle-mounted and ship-mounted integrated navigation tests are conducted. Compared with traditional UKF and the Sage-Husa adaptive UKF (SH-AUKF), this method has comparable filtering accuracy and better filtering stabili.y. The effectiveness of the proposed algorithm is verified.

关键词： Kalman filter dual-adaptive integrated navigation unscented Kalman filter(UKF) robust

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