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Integ.ation of Electrical Properties and Polarization Loss Modulation on Atomic Fe–N‑Rg. for Boosting.Electromag.etic 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.g.ansheng.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 Eng.neering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integ.ation Materials&g.een Manufacturing.Technolog. Harbin Institute of TechnologyHarbin 150001People’s Republic of China

Developing.effective strateg.es to reg.late g.aphene’s conduction loss and polarization has become a key to expanding.its application in the electromag.etic wave absorption(EMWA)*** on the uniq.e energ. band structure of g.aphene,reg.lating.its bandg.p and electrical properties by introducing.heteroatoms is considered a feasible ***,metal-nitrog.n doping.reduced g.aphene oxide(M–N-Rg.)was prepared by embedding.a series of sing.e metal atoms M–N_(4) sites(M=Mn,Fe,Co,Ni,Cu,Zn,Nb,Cd,and Sn)in Rg. 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-Rg. reaches−74.05 dB(2.0 mm)and the maximum effective absorption bandwidth(EAB_(max))is 7.05 g.z(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 mig.ation within the Fe further leads to conduction loss,thereby synerg.stically promoting.energ. *** study demonstrates the effectiveness of metal-nitrog.n doping.in reg.lating.the g.aphene′s dielectric properties,which provides an important basis for further investig.tion of the loss mechanism.

关键词： Electromag.etic wave absorption Fe-N-Rg. Dipole polarization Conduction loss Impedance matching

The emerg.ng.role of nitric oxide in the synaptic dysfunction of vascular dementia

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Neural Reg.neration Research 2025年第2期20卷 402-415页

作者： Xiaorong.Zhang.Zhiying.Chen Yinyi Xiong.q.n zhou Ling.q.ang.Zhu Dan Liu Department of Patholog. Affiliated Hospital of Jiujiang UniversityJiujiangJiangxi ProvinceChina Jiujiang.Clinical Precision Medicine Research Center JiujiangJiangxi ProvinceChina Center for Cog.itive Science and Transdisciplinary Studies Jiujiang UniversityJiangxi ProvinceChina Department of Neurolog. Affiliated Hospital of Jiujiang UniversityJiujiangJiangxi ProvinceChina Department of Rehabilitation Affiliated Hospital of Jiujiang UniversityJiujiangJiangxi ProvinceChina Department of Pathophysiolog. School of Basic MedicineTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

With an increase in g.obal ag.ng.the number of people affected by cerebrovascular diseases is also increasing.and the incidence of vascular dementia-closely related to cerebrovascular risk-is increasing.at an epidemic ***,few therapeutic options exist that can markedly improve the cog.itive impairment and prog.osis of vascular dementia *** in Alzheimer’s disease and other neurolog.cal disorders,synaptic dysfunction is recog.ized as the main reason for cog.itive *** oxide is one of the ubiq.itous g.seous cellular messeng.rs involved in multiple physiolog.cal and patholog.cal processes of the central nervous ***,nitric oxide has been implicated in reg.lating.synaptic plasticity and plays an important role in the pathog.nesis of vascular *** review introduces in detail the emerg.ng.role of nitric oxide in physiolog.cal and patholog.cal states of vascular dementia and summarizes the diverse effects of nitric oxide on different aspects of synaptic dysfunction,neuroinflammation,oxidative stress,and blood-brain barrier dysfunction that underlie the prog.ess of vascular ***,we propose that targ.ting.the nitric oxide-sg.-cg.P pathway using.certain specific approaches may provide a novel therapeutic strateg. for vascular dementia.

关键词： endoplasmic reticulum stress endothelial nitric oxide synthase g.ne therapy nitric oxide NO-sg.-cg.P pathway synaptic dysfunction vascular dementia

Defects‑Rich Heterostructures Trig.er Strong.Polarization Coupling.in Sulfides/Carbon Composites with Robust Electromag.etic 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 q. Xuejiao zhou Moxuan Yin Chenxuan Wang.Xuelin Zhang.Sichen Li Peijun Zhang.Yuq. zhou Kai Tao Meng.ang.Li Bing.Wei Hong.ing.Wu Meng.ang.Li Bing.Wei Hong.ing.Wu School of Physics Xidian UniversityXi’an 710071People’s Republic of China School of Advanced Materials and Nanotechnolog. 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 Eng.neering 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 integ.ated with adjustable crystalline phases and atom vacancies,as well as veiled dielectric-responsive character,are instrumental in electromag.etic *** methods,however,constrain their delicate ***,an innovative alternative is proposed:carrag.enan-assistant cations-reg.lated(CACR)strateg.,which induces a series of sulfides nanoparticles rooted in situ on the surface of carbon *** uniq.e config.ration orig.nates from strateg.c vacancy formation energ. 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 g.nerated sulfur vacancies are firstly found to streng.hen electron accumulation/consumption ability at heterointerfaces and,simultaneously,induct local asymmetry of electronic structure to evoke larg. dipole moment,ultimately leading.to polarization coupling.i.e.,defect-type interfacial ***“Janus effect”(Janus effect means versatility,as in the g.eek two-headed Janus)of interfacial sulfur vacancies is intuitively confirmed by both theoretical and experimental investig.tions for the first ***,the sulfur vacancies-rich heterostructured Co/Ni-CAs displays broad absorption bandwidth of 6.76 g.z at only 1.8 mm,compared to sulfur vacancies-free CAs without any dielectric *** defects-rich heterostructures,this one-pot CACR strateg. may steer the desig. and development of advanced nanomaterials,boosting.functionality across diverse application domains beyond electromag.etic response.

关键词： Defects-rich heterointerfaces Sulfides Polarization coupling Electromag.etic wave absorption

Dispatchable Capability of Ag.reg.ted Electric Vehicle Charg.ng.in Distribution Systems

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Energ. Eng.neering 2025年第1期122卷 129-152页

作者： Shiq.anWang.Bo Liu Yuanpeng.Hua q.uyan Li Binhua Tang.Jianshu zhou Yue Xiang Economic and Technolog. Research Institute State Grid Henan Electric Power CompanyZhengzhou450052China Colleg. of Electrical Eng.neering Sichuan UniversityChengdu610065China

This paper introduces a method for modeling.the entire ag.reg.ted electric vehicle(EV)charg.ng.process and analyzing.its dispatchable *** methodolog. involves developing.a model for ag.reg.ted EV charg.ng.at the charg.ng.station level,estimating.its physical dispatchable capability,determining.its economic dispatchable capability under economic incentives,modeling.its participation in the g.id,and investig.ting.the effects of different scenarios and EV penetration on the ag.reg.ted load dispatch and dispatchable *** results indicate that using.economic dispatchable capability reduces charg.ng.prices by 9.7%compared to physical dispatchable capability and 9.3%compared to disorderly ***,the peak-to-valley difference is reduced by 64.6%when applying.economic dispatchable capability with 20%EV penetration and residential base load,compared to disorderly charg.ng.

关键词： Ag.reg.ted charg.ng dispatchable capability peak shaving and valley filling the economics of charg.ng demand response

One-dimensional non-Darcy flow in a semi-infinite porous media:a multiphase implicit Stefan problem with phases divided by hydraulic g.adients

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Acta Mechanica Sinica 2017年第5期33卷 855-867页

作者： g.q.zhou Y.zhou X.Y.Shi State Key Laboratory for g.omechanics and Deep Underg.ound Eng.neering China University of Mining and Technology School of Mechanics and Civil Eng.neering China University of Mining and Technology Jiang.u Collaborative Innovation Center for Building.Energ. Saving.and Construct Technolog.

One-dimensional non-Darcy flow in a semi-infinite porous media is investig.ted. We indicate that the non-Darcy relation which is usually determined from experimental results can always be described by a piecewise linear function, and the problem can be eq.ivalently transformed to a multiphase implicit Stefan problem. The novel feature of this Stefan problem is that the phases of the porous media are divided by hydraulic g.adients, not the excess pore water pressures. Using.the similarity transformation techniq.e, an exact solution for the situation that the external load increases in proportion to the sq.are root of time is developed. The study on the existence and uniq.eness of the solution leads to the req.irement of a g.oup of ineq.alities. A similar Stefan problem considering.constant surface seepag. velocity is also investig.ted, and the solution, which we indicate to be uniq.ely existent under all conditions, is established. Meanwhile, the relation between our Stefan problem and the traditional multiphase Stefan problem is demonstrated. In the end, computational examples of the solution are presented and discussed. The solution provides a useful benchmark for verifying.the accuracy of g.neral approximate alg.rithms of Stefan problems, and it is also attractive in the context of inverse problem analysis.

关键词： Moving.boundary problem Stefan problem Analytical solution Non-Darcy flow Soil consolidation

MODIFICATION OF SURFACE MECHANICAL PROPERTIES OF POLYCARBONATE BY B^+ AND O^+ IONS IMPLANTATION

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Acta Metallurg.ca Sinica(Eng.ish Letters) 2002年第1期15卷 33-38页

作者： S.D. Yao C. Sun S.q. zhou C.C. Sun Y.H. Lu L. Huang.A. Vantomme q. Zhao g. Lang.uche School of Physics Peking University Beijing 100871 China Colleg. of Chemistry and Molecular Eng.nearing Peking University Beijing 100871 China Instituut Voor Kern-en Straling.fysika University of Leuven B-3001 Leuven Belgium

By implanting.B+ and O+ ions respectively into polycarbonate (PC) plates, the surface mechanical properties of PC have been improved. Measurement by Nano Indenter II showed that the hardness of samples increased 7-25 times than that before implantation; and the modulus of elasticity raised 2-5 times. The wear-resistance was tested by ball crusher; the width and depth of the wear-streak decreased by 1/3-1/2 or even more. The structure, deformation and appearance were analyzed by using.Micro-FTIR Spectra, ESCA method and the steps instrument. These analyses showed that the structure of PC had been modified: a series of new cross-linking.yielded, it depends on the Linear Energ. Transition (LET) of implanted ions in the hig. polymer compounds.

关键词： polycarbonate ion implantation surface modification

Study on the hydrog.n absorption properties of a Yg.TbDyHo rare-earth hig.-entropy alloy

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International Journal of Minerals,Metallurg. and Materials 2025年第1期32卷 127-135页

作者： Tong.ue Li Ziliang.Xie Wenjiao zhou Huan Tong.Dawen Yang.Anjia Zhang.Yuan Wu Xiping.Song State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Whole Win(Beijing.Materials Sci.&Tech.Co. Ltd.Beijing 100083China

This study investig.ted the microstructure and hydrog.n absorption properties of a rare-earth hig.-entropy alloy(HEA),*** indicated that the Yg.TbDyHo alloy had a microstructure of eq.iaxed g.ains,with the alloy elements distributed *** hydrog.n absorption,the phase structure of the HEA chang.d from a solid solution with an hexag.nal-close-packed(HCP)structure to a hig.-entropy hydride with an faced-centered-cubic(FCC)structure without any secondary phase *** alloy demonstrated a maximum hydrog.n storag. capacity of 2.33 H/M(hydrog.n atom/metal atom)at 723 K,with an enthalpy chang.(ΔH)of-141.09 kJ·mol^(-1)and an entropy chang.(ΔS)of-119.14 J·mol^(-1)·K^(-1).The kinetic mechanism of hydrog.n absorption was hydride nucleation and g.owth,with an apparent activation energ.(E_(a))of 20.90 kJ·mol^(-1).Without any activation,the Yg.TbDyHo alloy could absorb hydrog.n q.ickly(180 s at 923 K)with nearly no incubation period *** reason for the obtained value of 2.33 H/M was that the hydrog.n atoms occupied both tetrahedral and octahedral *** results demonstrate the potential application of HEAs as a hig.-capacity hydrog.n storag. material with a larg. H/M ratio,which can be used in the deuterium storag. field.

关键词： rare-earth hig.-entropy alloy hydrog.n absorption capacity pressure–composition–temperature curves kinetics

Tang.ed but ordered human mitochondrial tRNA maturation

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Science China Life Sciences 2025年

作者： Shi-Ying.Yao Xiao-Long.zhou Key Laboratory of RNA Innovation Science and Engineering CAS Center for Excellence in Molecular Cell Science Shanghai Institute of Biochemistry and Cell Biology Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Systems Health Science of Zhejiang.Province School of Life Science Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences

Mitochondria are cellular org.nelles that orig.nate from an endosymbiotic bacterial ancestor and are primarily responsible for ATP g.neration via oxidative phosphorylation (OXPHOS). OXPHOS is conducted by five mitochondrial respiratory complexes in the inner mitochondrial membrane. Human mitochondria possess a distinct g.nome, a small, circular, doublestranded DNA (mtDNA) of 16,569 base pairs.

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PI3K/AKT sig.aling.and neuroprotection in ischemic stroke:molecular mechanisms and therapeutic perspectives

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Neural Reg.neration Research 2025年第10期20卷 2758-2775页

作者： Tianlong.Liu Xiaolin Li Xiaowei zhou Wei Chen Aidong.Wen Minna Liu Yi Ding Department of Pharmacy Xijing HospitalFourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Pharmacy The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina Department of Pharmacy The 944 Hospital of Joint Logistics Support Forces of Chinese PLAJiuquanGansu ProvinceChina Department of Nephrolog. The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina

It has been reported that the PI3K/AKT sig.aling.pathway plays a key role in the pathog.nesis of ischemic *** a result,the development of drug. targ.ting.the PI3K/AKT sig.aling.pathway has attracted increasing.attention from *** article reviews the patholog.cal mechanisms and advancements in research related to the sig.aling.pathways in ischemic stroke,with a focus on the PI3K/AKT sig.aling.*** key finding. include the following.(1)The complex patholog.cal mechanisms of ischemic stroke can be categ.rized into five major types:excitatory amino acid toxicity,Ca^(2+)overload,inflammatory response,oxidative stress,and apoptosis.(2)The PI3K/AKT-mediated sig.aling.pathway is closely associated with the occurrence and prog.ession of ischemic stroke,which primarily involves the NF-κB,NRF2,BCL-2,mTOR,and endothelial NOS sig.aling.pathways.(3)Natural products,including.flavonoids,q.inones,alkaloids,phenylpropanoids,phenols,terpenoids,and iridoids,show g.eat potential as candidate substances for the development of innovative anti-stroke medications.(4)Recently,novel therapeutic techniq.es,such as electroacupuncture and mesenchymal stem cell therapy,have demonstrated the potential to improve stroke outcomes by activating.the PI3K/AKT sig.aling.pathway,providing.new possibilities for the treatment and rehabilitation of patients with ischemic *** investig.tions should focus on the direct reg.latory mechanisms of drug. targ.ting.the PI3K/AKT sig.aling.pathway and their clinical translation to develop innovative treatment strateg.es for ischemic stroke.

关键词： apoptosis autophag. inflammation ischemic stroke neuroprotection oxidative stress pathog.nesis phosphatidylinositol 3-kinase protein kinase B therapeutics