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Integration of Electrical Properties and Polarization Loss Modulation on Atomic Fe–N‑RGO for Boosting Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 517-532页

作者： Kaili Zhang Yuefeng Yan Zhen Wang Guansheng Ma Dechang jia Xiaoxiao Huang Yu Zhou State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001People’s Republic of China

Developing effective strategies to regulate graphene’s conduction loss and polarization has become a key to expanding its application in the electromagnetic wave absorption(EMWA)*** on the unique energy band structure of graphene,regulating its bandgap and electrical properties by introducing heteroatoms is considered a feasible ***,metal-nitrogen doping reduced graphene oxide(M–N-RGO)was prepared by embedding a series of single metal atoms M–N_(4) sites(M=Mn,Fe,Co,Ni,Cu,Zn,Nb,Cd,and Sn)in RGO using an N-coordination atom-assisted *** composites had adjustable conductivity and polarization to optimize dielectric loss and impedance matching for efficient EMWA *** results showed that the minimum reflection loss(RL_(min))of Fe–N-RGO reaches−74.05 dB(2.0 mm)and the maximum effective absorption bandwidth(EAB_(max))is 7.05 GHz(1.89 mm)even with a low filler loading of only 1 wt%.Combined with X-ray absorption spectra(XAFS),atomic force microscopy,and density functional theory calculation analysis,the Fe–N_(4) can be used as the polarization center to increase dipole polarization,interface polarization and defect-induced polarization due to d-p orbital hybridization and structural ***,electron migration within the Fe further leads to conduction loss,thereby synergistically promoting energy *** study demonstrates the effectiveness of metal-nitrogen doping in regulating the graphene′s dielectric properties,which provides an important basis for further investigation of the loss mechanism.

关键词： Electromagnetic wave absorption Fe-N-RGO Dipole polarization Conduction loss Impedance matching

Distributionally Robust Optimal Reactive Power Dispatch with Wasserstein Distance in Active Distribution Network

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Journal of Modern Power Systems and Clean Energy 2020年第3期8卷 426-436页

作者： Jun Liu Yefu Chen Chao Duan jiang Lin jia lyu Shaanxi Key Laboratory of Smart Grid School of Electrical EngineeringXi’an Jiaotong UniversityXi’anShaanxi 710049China Electric Power Dispatch and Control Center of Guangdong Power Grid Corporation GuangzhouGuangdong 510050China Department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJU.K.

The uncertainties from renewable energy sources(RESs)will not only introduce significant influences to active power dispatch,but also bring great challenges to the analysis of optimal reactive power dispatch(ORPD).To address the influence of high penetration of RES integrated into active distribution networks,a distributionally robust chance constraint(DRCC)-based ORPD model considering discrete reactive power compensators is proposed in this *** proposed ORPD model combines a second-order cone programming(SOCP)-based model at the nominal operation mode and a linear power flow(LPF)model to reflect the system response under ***,a distributionally robust optimization(WDRO)method with Wasserstein distance is utilized to solve the proposed DRCC-based ORPD *** WDRO method is data-driven due to the reason that the ambiguity set is constructed by the available historical data without any assumption on the specific probability distribution of the *** the more data is available,the smaller the ambiguity would *** results on IEEE 30-bus and 123-bus systems and comparisons with the other three-benchmark approaches demonstrate the accuracy and effectiveness of the proposed model and method.

关键词： Active distribution network chance constraint renewable energy source optimal reactive power dispatch(ORPD)

Prospects for the transformation and development of carbon storage in abandoned mines of coal enterprises from the perspective ofcarbon neutrality

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International Journal of Coal Science & Technology 2023年第3期10卷 24-40页

作者： xin lyu Tong Zhang Liang Yuan Juejing Fang State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China Institute of Energy Hefei Comprehensive National Science CenterHefei230031China

Under the carbon neutrality goal,coal enterprises must seek breakthroughs from abandoned mines,develop new resources in the new era,turn problems into countermeasures,and participate in the carbon emissions market,for contributing to the accomplishment of the national strategic goal of carbon *** this end,we investigated the relevant national policies and regulations to clarify the boundaries disclosed by the carbon information of enterprises,understood the development direction of carbon storage in abandoned mines,and clarified the transformation and development of carbon storage in aban-doned *** made a few suggestions:(1)China should learn from its past experience and other countries to develop the energy industry with Chinese characteristics and reform the economic system.(2)Coal enterprises must actively respond to the national carbon information disclosure policy,clarify their own responsibilities and carbon emission boundaries.(3)It is necessary to proactively obtain advanced knowledge and plan carbon storage pathways for abandoned mines.(4)Devel-opment problems of coal enterprises should be deduced using ***'dual carbon'goals should be achieved steadily step-by-step.(5)Three measures,*** the existing resource structure,coordinating the information of abandoned mines,and promoting the cultivation of scientific and technological talents.

关键词： Mining engineering Abandoned mines Carbon neutrality Carbon emission rights Carbon tax

Distributed collaborative complete coverage path planning based on hybrid strategy

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Journal of Systems Engineering and Electronics 2024年第2期35卷 463-472页

作者： ZHANG jia DU xin DONG Qichen xin Bin School of Automation Beijing Institute of TechnologyBeijing 100081China National Key Laboratory of Autonomous Intelligent Unmanned Systems Beijing Institute of TechnologyBeijing 100081China

Collaborative coverage path planning(CCPP) refers to obtaining the shortest paths passing over all places except obstacles in a certain area or space. A multi-unmanned aerial vehicle(UAV) collaborative CCPP algorithm is proposed for the urban rescue search or military search in outdoor *** to flexible control of small UAVs, it can be considered that all UAVs fly at the same altitude, that is, they perform search tasks on a two-dimensional plane. Based on the agents’ motion characteristics and environmental information, a mathematical model of CCPP problem is established. The minimum time for UAVs to complete the CCPP is the objective function, and complete coverage constraint, no-fly constraint, collision avoidance constraint, and communication constraint are considered. Four motion strategies and two communication strategies are designed. Then a distributed CCPP algorithm is designed based on hybrid strategies. Simulation results compared with patternbased genetic algorithm(PBGA) and random search method show that the proposed method has stronger real-time performance and better scalability and can complete the complete CCPP task more efficiently and stably.

关键词： multi-agent cooperation unmanned aerial vehicles(UAV) distributed algorithm complete coverage path planning(CCPP)

Assessment of FY-4A and Himawari-8 Cloud Top Height Retrieval through Comparison with Ground-Based Millimeter Radar at Sites in Tibet and Beijing

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Advances in Atmospheric Sciences 2021年第8期38卷 1334-1350页

作者： Bo LIU Juan HUO Daren lyu xin WANG Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

The accuracy of passive satellite cloud top height (CTH) retrieval shows regional dependence. This paper assesses the CTH derived from the FY-4A and Himawari-8 satellites through comparison with those from the ground-based millimeter radar at two sites: Yangbajing, Tibet, China (YBJ), and the Institute of Atmospheric Physics (IAP), Beijing, China. The comparison shows that Himawari-8 missed more CTHs at night than FY-4A, especially at YBJ. It is found that the CTH difference (CTHD;radar CTH minus satellite CTH) for FY-4A and Himawari-8 is 0.06 ± 1.90 km and −0.02 ± 2.40 km at YBJ respectively, and that is 0.93 ± 2.24 km and 0.99 ± 2.37 km at IAP respectively. The discrepancy between the satellites and radar at IAP is larger than that at YBJ. Both satellites show better performance for mid-level and low-level clouds than for high-level clouds at the two sites. The retrievals from FY-4A agree well with those from Himawari-8, with a mean difference of 0.08 km at YBJ and 0.06 km at IAP. It is found that the CTHD decreases as the cloud depth increases at both sites. However, the CTHD has no obvious dependence on cloud layers and fractions. Investigations show that aerosol concentration has little impact on the CTHD. For high and thin clouds, the CTHD increases gradually with the increase of the surface temperature, which might be a key factor causing the regional discrepancy between IAP and YBJ.

关键词： cloud top height Tibet millimeter radar FY-4A Himawari-8

Antibiotics in Drinking Water and Health Risks — China, 2017

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China CDC weekly 2020年第23期2卷 413-417,I0004-I0007页

作者： jia lyu Yongyan Chen Lan Zhang China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijingChina

Summary What is already known about this topic?Antibiotic contaminations in the environment are understood to pose human health risks including disturbing the microbiome in the human body and producing antibiotic-resistant bacteria,which pose serious public health *** have been detected in aquatic environments and drinking water worldwide.

关键词： Antibiotic environments Antibiotics

Metabolic pathway modulation by olanzapine:Multitarget approach for treating violent aggression in patients with schizophrenia

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World Journal of Psychiatry 2025年第1期15卷 37-53页

作者： Yan-Ning Song Shuang Xia Zhi Sun Yong-Chao Chen Lu jiao Wen-Hua Wan Hong-Wei Zhang Xiao Guo Hua Guo Shou-Feng jia Xiao-xin Li Shi-Xian Cao Li-Bin Fu Meng-Meng Liu Tian Zhou Lv-Feng Zhang Qing-Quan jia Department of Pharmacy The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina Department of Pharmacy The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Department of Pharmacy Zhumadian First People's HospitalZhumadian 463000Henan ProvinceChina Scientific Education Section The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina Department of Psychiatry The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina Clinical Laboratory The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina Publicity Division The Affiliated Encephalopathy Hospital of Zhengzhou University(Zhumadian Second People's Hospital)Zhumadian 463000Henan ProvinceChina

BACKGROUND The use of network pharmacology and blood metabolomics to study the patho-genesis of violent aggression in patients with schizophrenia and the related drug mechanisms of action provides new directions for reducing the risk of violent aggression and optimizing treatment *** To explore the metabolic regulatory mechanism of olanzapine in treating patients with schizophrenia with a moderate to high risk of violent *** Metabolomic technology was used to screen differentially abundant metabolites in patients with schizophrenia with a moderate to high risk of violent aggression before and after olanzapine treatment,and the related metabolic pathways were *** pharmacology was used to establish protein-protein interaction networks of the core targets of *** Ontology functional analysis and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis were subsequently *** Compared with the healthy group,the patients with schizophrenia group presented significant changes in the levels of 24 metabolites related to the disruption of 9 metabolic pathways,among which the key pathways were the alanine,aspartate and glutamate metabolism and arginine biosynthesis *** treatment with olanzapine,the levels of 10 differentially abundant metabolites were significantly reversed in patients with *** effectively regulated six metabolic pathways,among which the key pathways were alanine,aspartate and glutamate metabolism and arginine biosynthesis *** core targets of olanzapine were involved in several key *** The metabolic pathways of alanine,aspartate,and glutamate metabolism and arginine biosynthesis are the key pathways involved in olanzapine treatment for aggressive schizophrenia.

关键词： Schizophrenia Violent aggression Olanzapine Metabolomics Network pharmacology

Experimental,analytical and numerical investigation on tensile behavior of twisted fiber yarns

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Chinese Journal of Aeronautics 2021年第5期34卷 278-288页

作者： Xuefeng TENG Duoqi SHI xin JING Shuangqi lyu Xiaoguang YANG School of Energy and Power Engineering Beihang UniversityBeijing 100083China School of Power and Energy Northwestern Poly technical UniversityXi'an 710072China Aviation Engineering Institute Civil Aviation Flight University of ChinaGuanghan 618307China

Stitched composite materials are emerging as a promising material due to their high interlaminar strength,combined performance and light *** mechanical properties of stitch yarns are very essential for stitched composite *** this study,the tensile behaviors of the twisted fiber yarn in stitched composites were investigated experimentally,analytically and *** kinds of cross-sectional area of twisted yarn are proposed and *** paper presents an intersecting circle model to describe the cross-section of twisted fiber yarns,and a physics-based theoretical model to predict the effective tensile *** numerical models take into account the cross-sectional characteristic and the twist *** investigation shows that:the sum of each fiber area should be used for experimental analysis;and the crosssectional area surrounded by the yarn profile should be used for theoretical predictions and finite element(FE)*** relative errors of the prediction method and the FE simulation are less than 2%and 1%,*** friction between the fibers is derived,and the effect of friction on mechanical properties is *** investigation method will serve as a fundamental component of twisted fiber bundle/yarn analysis.

关键词： Friction Stitched composite Tensile behavior Twist Yarn architecture

Fractures interaction and propagation mechanism of multi-cluster fracturing on laminated shale oil reservoir

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Petroleum Science 2024年第4期21卷 2600-2613页

作者： jia-xin Lv Bing Hou Department of Petroleum Engineering China University of Petroleum(Beijing)at KaramayKaramay834000XinjiangChina Key Laboratory of Petroleum Engineering Ministry of EducationChina University of Petroleum(Beijing)Beijing102249China State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China

The continental shale reservoirs of Jurassic Lianggaoshan Formation in Sichuan Basin contain thin lamina,which is characterized by strong plasticity and developed longitudinal shell limestone *** improve the production efficiency of reservoirs by multi-cluster fracturing,it is necessary to consider the unbalanced propagation of hydraulic fractures and the penetration effect of *** paper constructed a numerical model of multi-fracture propagation and penetration based on the finite element coupling cohesive zone method;considering the construction cluster spacing,pump rate,lamina strength and other parameters studied the influencing factors of multi-cluster fracture interaction propagation;combined with AE energy data and fracture mode reconstruction method,quantitatively characterized the comprehensive impact of the strength of thin interlayer rock interfaces on the initiation and propagation of fractures that penetrate layers,and accurately predicted the propagation pattern of hydraulic fractures through laminated shale oil *** results revealed that in the process of multi-cluster fracturing,the proportion of shear damage is low,and mainly occurs in bedding fractures activated by outer *** the cluster spacing enhances the fracture system's penetration ability,though it lowers the activation efficiency of *** high plasticity of the limestone interlayer may impact the vertical propagation distance of the main *** the interface strength is beneficial to the reconstruction of the fracture height,but the interface communication effect is *** selection of layers with moderate lamina strength for fracturing stimulation,increasing the pump rate during fracturing and setting the cluster spacing reasonably are beneficial to improve the effect of reservoir stimulation.

关键词： Laminated shale Multi-cluster fracturing Cross-layer Cohesive zone model Acoustic emission technique