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Human extracellular matrix(ECM)-like collagen and its bioactivity

Regenerative Biomaterials 2024年第4期3卷 14-26页

作者： Hui Zhou Wenwei Li Lixin Pan Tianci Zhu Teng Zhou E.Xiao Qiang Wei State Key Laboratory of Polymer Materials and Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065China Hunan Maybio Bio-Pharmaceutical Co. LtdChangsha 410000China

Collagen,the most abundant structural protein in the human extracellular matrix(ECM),provides essential support for tissues and guides tissue *** its widespread use in tissue engineering,there remains uncertainty regarding the optimal selection of collagen ***-derived sources pose challenges such as immunogenicity,while the recombinant system is hindered by diminished *** this study,we hypothesized that human ECM-like collagen(hCol)could offer an alternative for tissue *** this study,a facile platform was provided for generating hCol derived from mesenchymal stem cells with a hierarchical structure and biochemical properties resembling native *** results further demonstrated that hCol could facilitate basal biological behaviors of human adipose-derived stem cells,including viability,proliferation,migration and adipocyte-like ***,it could promote cutaneous wound *** to its high similarity to native collagen and good bioactivity,hCol holds promise as a prospective candidate for in vitro and in vivo applications in tissue engineering.

关键词： extracellular matrix native-like collagen cell-derived matrix hierarchical structure

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Compact Sn/C composite realizes long-life sodium-ion batteries

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Nano Research 2023年第3期16卷 3804-3813页

作者： Mingdong Tan Shuanghui Han Zhenbang Li Hao Cui Danni Lei Chengxin Wang State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China

Sodium-ion batteries are considered as a promising low-cost alternative to commercial lithium-ion ***,the harsh preparation conditions and unsatisfactory electrochemical performance of most sodium-ion batteries anode materials limit their commercial ***,we develop a new alloying/dealloying method for producing nano-scale tin from freezing point to room *** to the unique surface properties of tin particles,a tin/carbon composite with a compact structure is *** coupled with a diglyme-based electrolyte,tin/carbon composite(contains 60 wt.%tin)exhibits a reversible capacity of 334.8 mAh·g^(−1)after 1,000 cycles at 500 mA·g^(−1).An as-prepared tin/carbon anode||high-load vanadium phosphate sodium full cell(N/P ratio:1.07)shows a stable cycle life of 300 cycles at 1 A·g^(−1).The achievement of such an excellent performance can be ascribed to the carbon conductive network and robust solid electrolyte interphase film,which facilitates the fast transportation of electrons and Na *** work provides a new idea to prepare other alloyed anode materials for highperformance sodium-ion batteries.

关键词： sodium-ion batteries alloying/dealloying method compact tin/carbon composite

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Strength and elastic modulus enhancement in Mg-Li-Al matrix composites reinforced by ex situ TiB2 particles via stir casting

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Journal of Magnesium and Alloys 2024年第9期12卷 3574-3588页

作者： Jiawei Sun Dehua Ding Wencai Liu Guohua Wu Hongjie Liu Guangling Wei Hezhou Liu National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

A novel Mg^(-1)0Li-3Al(wt.%,LA103)matrix composite reinforced by ex situ micron TiB_(2) particles was developed in the present *** ball milling and cold pressing pretreatment of the reinforcements made it feasible to prepare this material under stir casting conditions with good *** microstructure and mechanical properties of the composites prepared by different pretreatment methods were analyzed in *** TiB_(2) particles in the Al-TiB_(2)/LA103 composite using the pretreatment process were uniformly distributed in the microstructure due to the formation of highly wettable core-shell units in the *** with the matrix alloys,the Al-TiB_(2)/LA103 composite exhibited effective strength and elastic modulus improvements while maintaining acceptable *** strengthening effect in the composites was mainly attributed to the strong grain refining effect of *** work shows a balance of high specific modulus(36.1 GPa·cm^(3)·g^(-1))and elongation(8.4%)with the conventional stir casting path,which is of considerable application value.

关键词： Mg-Li composite Stir casting Elastic modulus Microstructure Mechanical properties

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How far are we to GPT-4V?Closing the gap to commercial multimodal models with open-source suites

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science China(Information sciences) 2024年第12期67卷 5-22页

作者： Zhe CHEN Weiyun WANG Hao TIAN Shenglong YE Zhangwei GAO Erfei CUI Wenwen TONG Kongzhi HU Jiapeng LUO Zheng MA Ji MA Jiaqi WANG Xiaoyi DONG Hang YAN Hewei GUO Conghui HE Botian SHI Zhenjiang JIN Chao XU Bin WANG Xingjian WEI Wei LI Wenjian ZHANG Bo ZHANG Pinlong CAI Licheng WEN Xiangchao YAN Min DOU Lewei LU Xizhou ZHU Tong LU Dahua LIN Yu QIAO Jifeng DAI Wenhai WANG State Key Laboratory for Novel Software Technology Nanjing University Shanghai AI Laboratory School of Computer Science Fudan University SenseTime Research Department of Information Engineering The Chinese University of Hong Kong Department of Electronic Engineering Tsinghua University

In this paper, we introduce InternVL 1.5, an open-source multimodal large language model(MLLM) to bridge the capability gap between open-source and proprietary commercial models in multimodal understanding. We introduce three simple improvements.(1) Strong vision encoder: we explored a continuous learning strategy for the large-scale vision foundation model — InternViT-6B, boosting its visual understanding capabilities, and making it can be transferred and reused in different LLMs.(2) Dynamic high-resolution: we divide images into tiles ranging from 1 to 40 of 448×448 pixels according to the aspect ratio and resolution of the input images, which supports up to 4K resolution input.(3) High-quality bilingual dataset: we carefully collected a high-quality bilingual dataset that covers common scenes, document images,and annotated them with English and Chinese question-answer pairs, significantly enhancing performance in optical character recognition(OCR) and Chinese-related tasks. We evaluate InternVL 1.5 through a series of benchmarks and comparative studies. Compared to both open-source and proprietary commercial models, InternVL 1.5 shows competitive performance, achieving state-of-the-art results in 8 of 18 multimodal benchmarks. Code and models are available at https://***/OpenGVLab/InternVL.

关键词： multimodal model open-source vision encoder dynamic resolution bilingual dataset

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The convergence properties of infeasible inexact proximal alternating linearized minimization

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science China Mathematics 2023年第10期66卷 2385-2410页

作者： Yukuan Hu Xin Liu State Key Laboratory of Scientific and Engineering Computing Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

The proximal alternating linearized minimization(PALM)method suits well for solving blockstructured optimization problems,which are ubiquitous in real *** the cases where subproblems do not have closed-form solutions,e.g.,due to complex constraints,infeasible subsolvers are indispensable,giving rise to an infeasible inexact PALM(PALM-I).Numerous efforts have been devoted to analyzing the feasible PALM,while little attention has been paid to the *** usage of the PALM-I thus lacks a theoretical *** essential difficulty of analysis consists in the objective value nonmonotonicity induced by the *** study in the present work the convergence properties of the *** particular,we construct a surrogate sequence to surmount the nonmonotonicity issue and devise an implementable inexact *** upon these,we manage to establish the stationarity of any accumulation point,and moreover,show the iterate convergence and the asymptotic convergence rates under the assumption of the Lojasiewicz *** prominent advantages of the PALM-I on CPU time are illustrated via numerical experiments on problems arising from quantum physics and 3-dimensional anisotropic frictional contact.

关键词： proximal alternating linearized minimization infeasibility nonmonotonicity surrogate sequence inexact criterion iterate convergence asymptotic convergence rate

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Effectively refining Al-10Si alloy via Al-Ti-Nb-B refiner with Nb_(2)O_(5)

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Journal of Materials science & Technology 2024年第9期176卷 204-210页

作者： Longfei Zhu Yu Zhang Qun Luo Liming Peng Qian Li State Key Laboratory of Advanced Special Steels&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai200444China College of Materials Science and Engineering Chongqing UniversityChongqing400044China National Engineering Research Centre of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China National Engineering Research Center for Magnesium Alloy Chongqing UniversityChongqing400044China College of Materials Science and EngineeringChongqing UniversityChongqing400044China National Key Laboratory of Advanced Casting Technologies Chongqing UniversityChongqing400044China

Al-Si alloys have excellent corrosion resistance,low thermal expansion coefficient,and high strength-to-weight ratio,which make them widely used in structural components in the automotive and aerospace industries[1,2].However,the coarseα-Al dendrites result in poor mechanical properties[3,4],and the widely used Al-5Ti-B(all compositions are in wt.%unless otherwise specified)refiner fails in as-cast aluminum alloys with high silicon content(≥5 wt.%)due to the Si-poisoning effect[5,6].Fortunately,in order to overcome Si-poisoning,a series of refiners have been ***-B refiner is effective for refining aluminum alloys with high silicon content,but it is easy to be poisoned by Ti/Zr[7,8].Al-Nb-B[9–11]and Al-V-B[12]refiners have a certain ability to overcome Si-poisoning,while the nucleating particles have a large density and are easy to agglomerate and settle,leading to the grain refinement fading ***-Ti-C-B refiner realizes the anti-Si/Zrpoisoning ofα-Al grain refinement based on the evolving effect of a doped TCB complex[13,14].Al-Ti-Nb-B refiner prepared with Nb partially substituted Ti can improve the refinement level of Al-10Si alloy to 109–125μm[15,16].However,the existing preparation method of the refiner uses pure Nb powder as raw material,resulting in high preparation costs,which limits its application in industry to a certain extent.

关键词： alloy corrosion refinement

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Selection Method for New Energy Output Guaranteed Rates Considering Optimal Energy Storage Configuration

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 539-547页

作者： Xin Cheng Tong Wu Wei Yao Yan Yang Guangdong Power Grid Corporation Guangzhou 510620China State Key Laboratory of Advanced Electromagnetic Engineering and Technology and School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The output of new energy represented by wind power and photovoltaic power features volatility and randomness. It is a practical approach to use the guaranteed rate with statistical characteristics to analyze the output coefficient of new energy. However, there is a lack of analysis and demonstration on the value of the new energy output guaranteed rate. To solve this problem, a selection method for the new energy output guaranteed rate considering optimal energy storage configuration is proposed. First, the influence of the new energy output guaranteed rate on the new energy output coefficient is analyzed. Secondly, with the goal of minimizing the comprehensive costs, an optimal configuration model of energy storage based on the output guaranteed rate of new energy is constructed, and particle swarm optimization is used for the optimization solution. Then, according to the optimal energy storage configuration results under different guaranteed rates, a reasonable new energy output guaranteed rate is determined by maximizing the comprehensive benefits obtained from energy storage. Finally, an example applied to the power grid in an area of Guangdong in Southern China is provided to illustrate the effectiveness of the proposed method.

关键词： Energystorage optimization guaranteed output guaranteed rate new energy consumption

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Tailored Sr FeO_(3-δ)for chemical looping dry reforming of methane

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Green Chemical engineering 2025年第1期6卷 102-115页

作者： Ao Zhu Dongfang Li Tao Zhu Xing Zhu State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming650093China

Chemical looping dry reforming of methane(CL-DRM)is a highly efficient process that converts two major greenhouse gases(CH_(4)and CO_(2))into syngas ready for the feedstock of liquid fuel *** of the major obstacles facing this technology now is creating oxygen carriers that are stable and *** fabricated highperformance Sr_(0.98)Fe_(0.7)Co_(0.3)O_(3-δ)perovskite-structured oxygen carrier by combining A-site defects and B-site doping of SrFeO_(3-δ).During isothermal CL-DRM tests at 850℃,Sr_(0.98)Fe_(0.7)Co_(0.3)O_(3-δ)achieved 87%CH_(4)conversion and 94%CO selectivity in the CH_(4)partial oxidation reaction,followed by a syngas yield of 8.5 mmol/g,and CO yield of 4.2 mmol/g in CO_(2)decomposition.A-site defect engineering of the perovskite creates abundant oxygen vacancies and enhances oxygen storage capacity(OSC).Co-doping of the B-site of Sr_(0.98)FeO_(3-δ)increases oxygen mobility and CH_(4)/CO_(2)activation,resulting in high activity in the CL-DRM *** methodology resulted in high ionic mobility and facilitated the rapid diffusion of oxygen in the bulk phase,thereby increasing the redox properties of SrFeO_(3-δ).The oxygen carrier exhibits excellent structural stability and regeneration ability in successive redox *** strategy offers a simple but very effective pathway to tailor OSC,oxygen mobility,and oxygen vacancies of perovskite-structured materials for chemical looping or redox-involved processes.

关键词： Chemical looping Reforming Methane Carbon dioxide Oxygen carrier

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Dynamic damage characteristics and control mechanism of rocks anchored by constant resistance and energy absorption material

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International Journal of Mining science and Technology 2025年第1期35卷 57-67页

作者： Bei Jiang Kunbo Wu Qi Wang Yetai Wang Wenrui Wu Yaoxia Feng Yanbo Zhang State Key Laboratory for Tunnel Engineering China University of Mining&Technology-BeijingBeijing 100083China State Key Laboratory of Explosion Science and Safety Protection Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources North China University of Science and TechnologyTangshan 063210China

With resource exploitation and engineering construction gradually going deeper,the surrounding rock dynamic disaster becomes frequent and *** anchorage support is a common control method of surrounding rock in underground *** study the dynamic damage characteristics of anchored rock and the energy absorption control mechanism of dynamic disasters,a new type of constant resistance and energy absorption(CREA)material with high strength,high elongation and high energy absorption characteristics is developed.A contrast test of rockbursts in anchored rock with different support materials is *** test results show that the surface damage rates and energy release degree of anchored rock with common bolt(CB)and CREA are lower than those of unanchored rock,*** total energy,average energy and maximum energy released by CREA anchored rock are 30.9%,94.3%and 84.4%lower than those of CB anchored *** with unanchored rock,the rockburst peak stress in the CREA anchored rock is increased by 39.9%,and the rockburst time is delayed by 53.2%.Based on the rockburst energy calculation model,the evolution law of rockburst peak stress and energy release is *** control mechanism of CREA support units on rock dynamic failure is clarified.

关键词： Constant resistance and energy absorption Anchored rock Rockburst Peak stress Control mechanism

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Highly efficient Ag/Ce-Zr catalyst for catalytic oxidation of NVOCs:balance of redox ability and acidity

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Rare Metals 2024年第12期43卷 6473-6485页

作者： Xiao-Han Guo Si-Yuan Sun Mei-Xing-Zi Gao Qi-Guang Dai Wang-Cheng Zhan Li Wang Yun Guo Ai-Yong Wang Yang-Long Guo State Key Laboratory of Green Chemical Engineering and Industrial Catalysis School of Chemistry and Molecular EngineeringResearch Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai200237Republic of China

Due to the presence of nitrogen,nitrogen-containing volatile organic compounds(NVOCs) are more difficult to remove than conventional volatile organic compounds(VOCs).Both catalytic activity and N_(2)selectivity should be considered in the design of suitable catalysts.A series of Ag/Ce-Zr solid solution(Ag/CZ)catalysts were prepared and applied to the catalytic oxidation of N,N-dimethylformamide(DMF).Redox ability and acidity were regulated by modifying the Zr *** introduction of Zr promoted the formation of active oxygen species until the molar ratio of Zr reached 0.5,after which the formation ***,adding Zr increased the number of weak and medium acidic sites,which significantly improved DMF *** improved DMF adsorption hindered the combination of nitrogen and active oxygen,thus reducing the generation of NO_(x)***,the Ag/CZ(5:5) catalyst,with suitable redox ability and acidity,exhibited the highest activity(T_(90)=176℃),the lowest elimination temperature of organic compounds(T=255℃),satisfactory N_(2)yield(95%-75% in the range of 240-400℃),and outstanding stability under both common and humid conditions(at least50 h).The reaction mechanism was investigated based on the in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS) *** the catalytic oxidation of DMF,the surface lattice oxygen directly participated in the dehydrogenation and dissociation of the C(O)-N *** generated dimethylamine(DMA) was then oxidized by active oxygen species to form the final product.

关键词： Catalytic oxidation VOCs NVOCs Ce-Zr solid solution Redox ability Acidity

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