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SSRN 2025年

作者： Xie, Peng-Xing Zhao, Qing-Yuan Dong, Haojie Long, Tao Ding, Meng-Sha Xie, Bin Wang, Xiaofeng Ling, Wei Liu, Mengting Wu, Xiongwei Wang, Peng-Fei Zeng, Xianxiang School of Chemistry and Materials Science Hunan Agricultural University Changsha410128 China Center of Nanomaterials for Renewable Energy State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi'an Jiaotong University Shaanxi Xi’an710049 China Key Laboratory of Physics and Technology for Advanced Batteries Ministry of Education College of Physics Electron Microscopy Center Jilin University Changchun130012 China Hunan Engineering Technology Research Center of Vanadium Flow Battery and Energy Storage System Hunan Changsha410036 China College of Chemistry and Chemical Engineering Hunan Normal University Hunan Changsha410081 China

Delivery of high energy density in polyanion compound-Na3V2(PO4)3 based on three-electron redox is still challenging because of their controversial multi-electron reaction mechanism and unsatisfactory electrochemical reversibility. Herein, the reversible V4+/V5+ redox (ca. 4.0 V) could be successfully activated in Na4VFe(PO4)3 cathode material through a Na-rich strategy, demonstrating a reversible specific capacity of 154.7 mAh g−1 at 0.1 C and 90.3 mAh g−1 after 800 cycles at 20 C, with 80% of the initial capacity retained. The entire electrochemical reaction undergoes a highly recoverable phase transition by in-situ X-ray diffraction. Impressively, the Na-rich strategy could not only allow Na2 site to be occupied to activate the V4+/V5+ redox pair confirmed by X-ray absorption near-edge structure spectroscopy, but also enable Na+ transportation across the generated vacancies rather than synergistic Na+ diffusion. Therefore, Na4VFe(PO4)3||hard carbon full batteries deliver a high specific capacity of 104.5 mAh g−1 and 90 mAh g−1 at 0.2 C and 5 C, respectively. This work provides rational design strategy of multi-electron transfer reaction in high-energy sodium-ion batteries. © 2025, The Authors. All rights reserved.

关键词： Sodium-ion batteries

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Dendritic and spherical crystal reinforced metallic glass matrix composites

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International Journal of Minerals,Metallurgy and Materials 2013年第4期20卷 386-392页

作者： Jun-wei Qiao Yong Zhang Hui-jun Yang Sheng-bo Sang Laboratory of Applied Physics and Mechanics of Advanced Materials College of Materials Science and Engineering Taiyuan University of Technology Key Laboratory of Interface Science and Engineering in Advanced Materials (Ministry of Education) Taiyuan University of Technology State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing MicroNano System Research Center Taiyuan University of Technology

Zr-based bulk metallic glass matrix composites （BMGMCs） with a composition of Zr60.0Ti14.7Nb5.3Cu5.6Ni4.4- Be10.0 （at%） were fabricated by an innovative process, i.e., semisolid processing plus Bridgman solidification. Different morphologies, distributions, and volume fractions of the crystalline phases can be achieved by tailoring the withdrawal velocity. The largest fi-acture strain of Zr60.0Ti14.7Nb5.3Cu5.6Ni4.4Be10.0 （at%） composites with the withdrawal velocity of 1.0 mm/s was found to be 16.7%. The mechanism of plasticity improvement is mainly attributed to the interpenetrated structure of the crystalline phase, which greatly confines the rapid propagation of shear bands.

关键词： metallic glass composite materials mechanical properties plastic deformation

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Enhanced conversion efficiency of Yb^(2+)–Yb^(3+)-codoped glass as spectral converter for photovoltaic application

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Chinese Science Bulletin 2014年第5期59卷 480-483页

作者： Lu Sun Wenbin Xu Chun Jiang State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University

We propose a kind of Yb2?–Yb3?-codoped glass,which is used as spectral converter layer to adjust AM1.5 solar spectrum for a better match with silicon *** energy-level rate equations and power transmission equations are established to analyze the down-conversional effect of the codoped glass on solar *** numerical results show that with proper doping concentration and thickness the glass layer may improve conversion efficiency by about 12%.Moreover,we also apply the modified spectrum as excitation source of solar cell in a simulation platform,and reveal that there is about 15%improvement in practical cells.

关键词：掺杂玻璃转换效率转换器频谱应用共掺光伏镱

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Numerical analysis of four-wave-mixing based multichannel wavelength conversion techniques in fibers

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Journal of Semiconductors 2009年第5期30卷 55-59页

作者：贾亮张帆李明刘育梁陈章渊 Optoelectronic System Laboratory Institute of SemiconductorsChinese Academy of Sciences State Key Laboratory of Advanced Optical Communication Systems & Networks School of Electronics Engineering and Computer SciencePeking University

We numerically investigate four-wave-mixing （FWM） based multichannel wavelength conversion for amplitude-modulated signals, phase-modulated signals, together with mixed amplitude and phase modulated signals. This paper also discusses the influence of stimulated Brillouin scattering （SBS） effects on high-efficiency FWM-based wavelength conversion applications. Our simulation results show that DPSK signals are more suitable for FWM-based multichannel wavelength conversion because the OOK signals will suffer from the inevitable data- pattern-dependent pump depletion. In future applications, when the modulation format is partially upgraded from OOK to DPSK, the influence of OOK signals on the updated DPSK signals must be considered when using multi-channel wavelength conversion. This influence becomes severe with the increase of OOK channel number. It can be concluded that DPSK signals are more appropriate for both transmission and multichannel wavelength conversion, especially in long haul and high bit-rate system.

关键词： stimulated Brillouin scattering wavelength conversion four-wave mixing nonlinear optics

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Modelling Method and Meshing Characteristics of a Novel Curve-Surface Conjugate Internal Gear Drive

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Chinese Journal of Mechanical Engineering 2024年第5期37卷 216-232页

作者： Xinxin Ye Luhe Zhang Dongyu Wang Jingming Jiang Wenjun Luo Bingkui Chen State Key Laboratory of Mechanical Transmission for Advanced Equipment Chongqing UniversityChongqing 400030China Shanghai Aerospace System Engineering Research Institute Shanghai 201109China

Space exploration has become a major focus in the field of technology,with gear transmissions in aerospace equipment playing a crucial *** the extreme environment of space,gear transmissions face challenges like large temperature differentials,deformation and maintenance difficulties,which will severely impact transmission accuracy and service *** meet the growing demands for high-performance gear transmissions with high transmission efficiency and error adaptability in the aerospace field,this paper proposes a novel curve-surface conjugate internal gear drive consisting of an involute internal gear and a curve-surface *** fundamental theory of curve-surface conjugation is introduced,and the construction method for curve-surface gear based on a selected contact path and meshing tube is *** analysis models including induced curvature,sliding ratio and tooth contact analysis with errors(ETCA)are simulated to evaluate the meshing ***,prototypes are manufactured and experimental setups are established to validate the transmission *** results indicate that as the rotational speed increases,the transmission efficiency of the curve-surface conjugate internal gear drive improves,which is contrary to the trend observed in involute gear *** the transmission efficiency of the curve-surface conjugate internal gear drive surpasses that of the involute gear drive at higher rotational ***,this novel gear drive exhibits excellent error adaptability,maintaining intact contact paths and high transmission efficiency even in the presence of assembly *** study provides new ideas for the design and manufacture of high-performance gear transmissions from the perspective of spatial geometric elements.

关键词： Internal gear drive Tooth surface geometry Error adaptability Transmission efficiency

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Type Synthesis of Fully-isotropic 2T3R 5-DoF Hybrid Mechanisms

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Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao 2019年第3期40卷 307-314页

作者： Zhang, Hong Zhou, Hui Qin, Youlei Ge, Shuyi Wang, Kun Cao, Yi School of Mechanical Engineering Jiangnan University Wuxi214122 China State Key Laboratory of Mechanical System and Vibration Shanghai200240 China State Key Laboratory of Robotics and System Harbin150080 China Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology Wuxi214122 China

In mechanical design, it is necessary to synthesize the mechanism,especially for the fully-isotropic hybrid mechanisms (HMs). This article proposes a simple but very effective approach for fully-isotropic HMs by means of GF set theory. firstly, a type synthesis method for HMs is simply presented, especially, the option standard of the input motion joint and the steps for the integration of the branches are given which provide the theoretical foundations for the integration of the type structure of completely isotropic HMs. Secondly, the process of type synthesis for fully-isotropic HMs is described in detail. To corroborate the usefulness of the proposed method for fully-isotropic HMs, type synthesis of fully-isotropic 2T3R 5-Degree-0f-Freedom (DoF) HMs is illustrated with example, where T denotes translation and R denotes rotation. Finally, the forward displacement analysis of a synthesized 2T3R fully-isotropic HM is carried out. The expression of the Jacobian matrix is deduced, it shows that the Jacobian matrix of the synthesized fully-isotropic HM is a 5×5 identity matrix throughout the entire workspace validating the fully-isotropic feature of the HM and the effectiveness of the type of composite approach for fully-isotropic HMs. © 2019, Chinese Mechanical Engineering Society. All right reserved.

关键词： Jacobian matrices

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Numerical analysis for four-wave mixing based wavelength conversion of differential phase-shift keying signals

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Chinese Optics Letters 2009年第7期7卷 617-620页

作者：贾亮张帆李明刘育梁陈章渊 State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Optoelectronic System Laboratory Institute of Semiconductors Chinese Academy of Sciences

We numerically investigate the main constrains for high efficiency wavelength conversion of differential phase-shift keying （DPSK） signals based on four-wave mixing （FWM） in highly nonlinear fiber （HNLF）. Using multi-tone pump phase modulation techniques, high efficiency wavelength conversion of DPSK signals is achieved with the stimulated BriIlouin scattering （SBS） effects effectively suppressed. Our analysis shows that there is a compromise between conversion efficiency and converted idler degradation. By optimizing the pump phase modulation configuration, the converted DPSK idler＇s degradation can be dramatically decreased through balancing SBS suppression and pump phase modulation degradation. Our simulation results also show that these multi-tone pump phase modulation techniques are more appropriate for the future high bit rate systems.

关键词： Conversion efficiency Degradation Frequency modulation Optical frequency conversion Phase shift Phase shift keying Pumps Stimulated Brillouin scattering

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Multifunctional nanocomposite-driven microneedles enabling bacteria capturing, detecting, and killing for precision treatment of acne with varying severities

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Chemical Engineering Journal 2025年 514卷

作者： Li, Huaan Li, Hanqi Kou, Yuwei Chen, Weiqiang He, Kerui Wen, Dingsheng Wen, Lu He, Jun Chen, Gang Guangdong Provincial Key Laboratory for Research and Evaluation of Pharmaceutical Preparations & Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System Center for Drug Research and Development Guangdong Pharmaceutical University Guangzhou510006 China School of Pharmacy Guangdong Pharmaceutical University Guangzhou510006 China National Advanced Medical Engineering Research Center China State Institute of Pharmaceutical Industry Shanghai201203 China

Acne is a prevalent chronic inflammatory skin disorder predominantly caused by Cutibacterium acnes (C. acnes). Current diagnostic approaches are subjective, lacking consideration of the correlation between C. acnes proliferation and disease development. Meanwhile, conventional therapies rely on standardized dosing regimens, which fail to manage acne with varied severities, resulting in either overtreatment or undertreatment. To address these limitations, a novel photodynamic microneedle that integrates diagnostic and therapeutic functions for precision therapy is proposed. The microneedle is loaded with a multifunctional nanocomposite that is composed of chitosan (CS), curcumin (CUR), and tanshinone IIA (TSIIA). The positively charged CS enables effective bacteria capturing, while CUR with fluorescence properties offers bacteria detecting and photodynamic therapeutic functions. TSIIA provides an anti-inflammatory effect to enhance the therapy. The complex of these components forms a tangled structure that enables efficient bacteria capturing. Notably, a relationship between C. acne concentration-light dose can be elaborately integrated, ensuring on-demand treatment of acne with different severities. Such accurate modulations enable effective bacterial eradication while minimizing excessive accumulation of reactive oxygen species, avoiding potential side effects associated with photodynamic therapy. Therefore, this versatile platform not only offers a robust diagnostic tool for acne but also provides a promising solution for on-demand treatment, advancing the application of precision medicine in the treatment of bacterial infection. © 2025

关键词： Theranostics

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A Potassium Atom Four-Level Active Optical Clock Scheme

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Chinese Physics Letters 2013年第4期30卷 34-37页

作者： ZHANG Sheng-Nan WANG Yan-Fei ZHANG Tong-Gang ZHUANG Wei CHEN Jing-Biao Institute of Quantum Electronics and State Key Laboratory of Advanced Optical Communication and System Network School of Electronics Engineering and Computer SciencePeking UniversityBeijing 100871

We present an active optical clock scheme with a four-level quantum potassium *** calculate the population probabilities of each state using the density *** the steady state,ρ33 andρ55 are equal to 8.3%and 3.5%,respectively,and the population inversion between the 5S1/2 and 4P3/2 states is built up in the thermal potassium cell with a 404.7 nm pumping *** to the mechanism of the active optical clock,under the action of the 404.7 nm pumping laser,the scheme can output a 1252.2 nm quantum-limited-linewidth laser,which can be directly used as an active optical frequency standard.

关键词： pumping potassium quantum

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Adiabatic Passage Based on the Calcium Active Optical Clock

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Chinese Physics Letters 2010年第7期27卷 105-107页

作者：解晓鹏庄伟陈景标 Institute of Quantum Electronics and State Key Laboratory of Advanced Optical Communication System & Network School of Electronics Engineering & Computer Science Peking University Beijing 100871

We propose a new application of the optical adiabatic passage effect for the excitation of a thermal atomic beam, which will be used in the calcium active optical clock to produce population inversion. A comparison between the optical adiabatic passage effect and the Rabi π pulse is investigated, 99% of the calcium atoms in the atomic beam that has a wide velocity distribution will be excited to the upper state for population inversion using the adiabatic passage, while 76% at most will be excited to the excited state using the π pulse with suitable parameters.

关键词： ATOMIC beams OPTICAL properties NUCLEAR excitation MATRIX inversion CALCIUM PARTICLE beams

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