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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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[Current advances in the analysis of free RNA modified nucleosides by high performance liquid chromatography-tandem mass spectrometry]

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Se pu = Chinese journal of chromatography 2025年第1期43卷 3-12页

作者： Lyu-Ye Zhang wei-bing Zhang Hai-Lin Wang State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. Shanghai Key Laboratory of Functional Materials Chemistry School of Chemistry & Molecular Engineering East China University of Science and Technology Shanghai 200237 China. State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China 3. University of Chinese Academy of Sciences Beijing 100049 China. University of Chinese Academy of Sciences Beijing 100049 China.

Post-transcriptional ribonucleic acid (RNA) modifications play crucial roles in regulating gene expression, with both eukaryotic and prokaryotic RNA exhibiting more than 170 distinct and ubiquitous modifications. RNA turnover generates numerous free nucleosides, including unmodified nucleosides and a variety of modified ones. Unlike unmodified nucleosides, modified nucleosides are not further degraded or used in the salvage-synthesis pathway owing to a lack of specific enzymes, which leads to the cytosolic accumulation or cellular efflux of modified nucleosides. These modified nucleosides can act as signaling molecules that regulate downstream pathways once transported to the extracellular space; alternatively, they are metabolized in the bloodstream and excreted in urine. Metabolized modified nucleosides are altered by cellular stress responses and mediate abnormal physiological states. Changes in the urinary and blood levels of modified nucleosides associated with cancer can serve as biomarkers for disease. Therefore, identifying and accurately quantifying nucleosides is vital for understanding RNA degradation and associated patterns of nucleoside metabolism. Such analyses are helpful when studying the biological functions and potential clinical applications of modified nucleosides. In this regard, high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) offers significant advantages in terms of sensitivity, selectivity, and efficiency, and has been widely used to analyze DNA and RNA nucleosides/nucleotides and their analogues. Multiple MS detection patterns and quantification methods have been established to detect nucleosides in biological samples, including cultured cells, urine, blood, and tissue samples. However, the development of an accurate HPLC-MS/MS method faces several challenges. Firstly, the presence of a complex biological matrix that contains macromolecules, small molecules, and salts can interfere with analysis. Salts and co-elu

关键词： RNA modifications high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) metabolite analysis methylated nucleosides

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Numerical investigation of transcritical liquid film cooling in a methane/oxygen rocket engine

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航空动力学报 2011年第4期26卷 903-916页

作者： YANG wei SUN bing School of Astronautics Beijing University of Aeronautics and Astronautic Beijing 100191 China

Transcritical film cooling was investigated by numerical study in a methane cooled methane/oxygen rocket *** respective time-averaged Navier-Stokes equations have been solved for the compressible steady three-dimensional(3-D) *** flow field computations were performed using the semi-implicit method for pressure linked equation(SIMPLE) algorithm on several blocks of nonuniform collocated *** calculation was conducted over a pressure range of 202 650.0 Pa to 1.2×107 Pa and a temperature range of 120.0 K to 3 568.0 ***-nine different cases were simulated to calculate the impact of different *** results show that mass flow rate,length,diameter,number and diffused or convergence of film jet channel,injection angle and jet array arrangements have great impact on transcritical film cooling ***,shape of the jet holes and jet and crossflow turbulence also affect the wall temperature *** rows of film arranged in different axial angles and staggered arrangement were proposed as new liquid film *** radial angles have impact on the film cooling effectiveness in two row-jets cooled *** case of in-line and staggered arrangement are almost the same in the region before the second row of jets,but a staggered arrangement has a higher film cooling effectiveness from the second row of jets.

关键词： liquid film cooling numerical study rocket transcritical semi-implicit method for pressure linked equation(SIMPLE) film cooling effectiveness

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Synthesis of Heterocycle Compounds Containing Two Pyridazinone Units

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Chemical Research in Chinese Universities 2008年第6期24卷 739-742页

作者： XIN bing-wei Department of Chemistry Dezhou University Dezhou 253023 P. R. China

Four novel compounds containing two pyridazinone units attached to one benzene or pyridine ring, protected and deprotected 1,5-di[3（2H）-pyridazinon-6-yl]benzene and 2,6-di[3（2H）-pyridazinon-6-yl]pyridine were synthesized in eight steps, which provided a useful method for the preparation of pyridazinone derivatives via the Stetter and cyclization reactions. Their structures were characterized by ^1H NMR, ^13C NMR, and HRMS.

关键词： 1,5-Di[3(2H)-pyridazinon-6-yl]benzene 2,6-Di[3(2H)-pyridazinon-6-yl]pyridine Pyridazinone Stetter reaction Antitumor compound

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Study on pressure wave propagation in two-phase flow in liquid oxygen feed pipe between pumps

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航空动力学报 2010年第10期25卷 2352-2357页

作者： wei Xin SUN bing FANG Jie School of Astronautics Beijing University of Aeronautics and Astronautics Beijing 100191 China

A study on the character of pressure wave propagation was proposed for the gas liquid oxygen two-phase flow in the pipe between *** to the practical working conditions,the homogenous model based on the compressibility theory regarding a single bubble in an infinite liquid,and Redlich-Kwong gas equation was derived a model for the low temperature and high pressure case,especially considering the change of the ratio of density of gas to one of *** numerical tests were *** results not only show the agreement between numerical simulation for this model and experiment at the normal temperature and pressure is good,but also show that the modifications of the model for the low temperature and high pressure condition are *** study is of reference to further study of oscillation restrain and relative pipe tests.

关键词： two-phase flow pressure wave pipe between pumps phase velocity attenuation

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Antifouling Technology Trends in Marine Environmental Protection

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Journal of Bionic Engineering 2021年第2期18卷 239-263页

作者： Limei Tian Yue Yin wei bing E Jin Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China weihai Institute for Bionics-Jilin University Weihai 264207China School of Chemistry and Life Science Changchun University of TechnologyChangchun 130012China

Marine fouling is a worldwide problem,which is harmful to the global marine ecological environment and economic *** traditional antifouling strategy usually uses toxic antifouling agents,which gradually exposes a serious environmental ***,green,long-term,broad-spectrum and eco-friendly antifouling technologies have been the main target of engineers and *** recent years,many eco-friendly antifouling technologies with broad application prospects have been developed based on the low toxicity and non-toxicity antifouling agents and *** this review,contemporary eco-friendly antifouling technologies and materials are summarized into bionic antifouling and non-bionic antifouling strategies(2000-2020).Non-bionic antifouling technologies mainly include protein resistant polymers,antifoulant releasing coatings,foul release coatings,conductive antifouling coatings and photodynamic antifouling *** antifouling technologies mainly include the simulated shark skin,whale skin,dolphin skin,coral tentacles,lotus leaves and other biology *** future research directions and challenges are also discussed in the end,and we expect that this review would boost the development of marine antifouling technologies.

关键词： biofouling antifouling technologies bionic non-bionic biofilm

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Fast division-free parallel structure for convolution perfectly matched layer in finite difference time domain method

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The Journal of China Universities of Posts and Telecommunications 2015年第1期22卷 72-76,82页

作者： Bai bing Niu Zhongqi Niu Yi wei bing Zhao Gang School of Electronic Engineering Xidian University School of Physics and Optoelectronic Engineering Xidian University

Parallel acceleration of convolution perfectly matched layer （CPML） algorithm suffers from massive division operation which is widely accepted as one of the most expensive operations for the equipment such as graphic processing unit （GPU）, field programmable gate array （FPGA） etc. In pursuit of higher efficiency and lower power consumption, this article revisited the CPML theory and proposed a new fast division-free parallel CPML structure. By optimally rearranging the CPML inner iteration process, all the division operators can be eliminated and replaced by recalculating the related field updating coefficients offline. Experiments show that the proposed division-free structure can save more than 50% arithmetic instructions and 25% execution time of the traditional parallel CPML structure without any accuracy loss.

关键词： division elimination convolution perfectly matched layer finit difference time domain parallel computing graphic processing unit

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Spiral wave chimeras in populations of oscillators coupled to a slowly varying diffusive environment

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Frontiers of physics 2023年第1期18卷 71-83页

作者： Lei Yang Yuan He bing-wei Li School of Physics Hangzhou Normal UniversityHangzhou 311121China

Chimera states are firstly discovered in nonlocally coupled oscillator *** a nonlocal coupling arises typically as oscillators are coupled via an external environment whose characteristic time scaleτis so small(i.e.,τ→0)that it could be eliminated ***,whether the chimera states still exist in the opposite situation(i.e.,τ≫1)is ***,by coupling large populations of Stuart–Landau oscillators to a diffusive environment,we demonstrate that spiral wave chimeras do exist in this oscillator-environment coupling system even whenτis very *** transitions such as from spiral wave chimeras to spiral waves or unstable spiral wave chimeras as functions of the system parameters are explored.A physical picture for explaining the formation of spiral wave chimeras is also *** existence of spiral wave chimeras is further confirmed in ensembles of FitzHugh–Nagumo oscillators with the similar oscillator-environment coupling *** results provide an affirmative answer to the observation of spiral wave chimeras in populations of oscillators mediated via a slowly changing environment and give important hints to generate chimera patterns in both laboratory and realistic chemical or biological systems.

关键词： spiral wave chimeras reaction-diffusion systems oscillator-environment coupling pattern formation

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Space Environment Simulation for Material Processing by Acoustic Levitation

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Chinese Physics Letters 2001年第1期18卷 68-70页

作者： XIE Wen-Jun wei bing-Bo Department of Applied Physics Northwestern Polytechnical UniversityXi'an 710072

Single-axis acoustic levitation of four polymer samples has been realized in air under the ground-based laboratory conditions for the purpose of space environment simulation of containerless *** levitation capabilities are investigated by numerical calculations based on a model of the boundary element method corresponding to our levitator and following Gor'kov and Barmatz's *** calculated results,such as the resonant distance between the reflector and the vibrating source and the positions of levitated samples,agree well with experimental observation,and the effect of gravity on the time-averaged potential for levitation force is also *** an application,the containerless melting and solidification of a liquid crystal,4-Pentylphenyl-4'-methybenzoate,is successfully accomplished,in which undercooling up to 16 K is obtained and the rotation and oscillation of the sample during solidification may result in fragmentation of the usual radiating surface growth morphology.

关键词： solidification vibrating rotation

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A Numerical Model for Edge Waves on A Compound Slope

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China Ocean Engineering 2017年第2期31卷 167-172页

作者： LU Yang FENG wei-bing ZHANG Yu FENG Xi College of Harbor Coastaland Offshore EngineeringHohai University

An edge wave is a kind of surface gravity wave basically travelling along a shoaling beach. Based on the periodic assumption in the longshore direction, a second order ordinary differential equation is obtained for numerical simulation of the cross-shore surface elevation. Given parameters at the shoreline, a cross-shore elevation profile is obtained through integration with fourth-order Runge Kutta technique. For a compound slope, a longshore wavenumber is obtained by following a geometrical approach and solving a transcendental equation with an asymptotic method. Numerical results on uniform and compound sloping beaches with different wave periods, slope angles, modes and turning point positions are presented. Some special scenarios, which cannot be predicted by analytical models are also discussed.

关键词： edge wave compound slope full water wave equation geornetrical approach numerical integration

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