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Self-reinforced Calcium Phosphate Cement Inspired by Sea Cucumber Dermis

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 682-688页

作者：吴治文 WANG Zihao CAI Zepeng QU liting 于涛 College of Chemistry and Materials Science Jinan UniversityGuangzhou 510632China Guangdong Provincial Key Laboratory of Spine and Spinal Cord Reconstruction The Fifth Affiliated Hospital(Heyuan Shenhe People’s Hospital)Jinan UniversityHeyuan 517000China

A composite bone cement based onα-TCP with self-reinforcing characteristics is prepared by compounding cellulose whiskers and polyvinyl alcohol in different *** this system,we are inspired by the sea cucumber,which can alter the stiffness of their inner dermis *** the formation of hydrogen bonds between the hydroxyl groups on the cellulose whiskers and PVA,the bone cement matrix can be strengthened during the curing process of *** the process of bone cement blending,there is more water,the hydrogen bond connection is destroyed,so the slurry has better fluidity at this *** the hydration of the bone cement progresses,the reduction of the water phase leads to the formation of a permeable network structure of hydrogen bond connections between the *** dual-phase action of PVA and whiskers greatly increases the mechanical strength of the bone cement system(5.5 to 23.8 MPa),while the presence of polyvinyl alcohol improves the toughness of the bone cement *** work was supposed to explore whether the chemoresponsive materials can be adapted to biomedical materials,for example,bone repair.

关键词： bone repair self-reinforce chemoresponsive hydrogen bond

Advanced Pt‐based intermetallic nanocrystals for the oxygen reduction reaction

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Chinese Journal of Catalysis 2022年第6期43卷 1444-1458页

作者： Jingsen Bai liting yang Zhao Jin Junjie Ge Wei Xing State Key Laboratory of Electroanalytic Chemistry Jilin Province Key Laboratory of Low Carbon Chemistry PowerChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026AnhuiChina

Proton exchange membrane fuel cells(PEMFCs)are considered ideal energy‐conversion devices because of their environmentally friendly nature and high theoretical energy ***,cathodic polarization,which is a result of the sluggish oxygen reduction reaction(ORR)kinetics,is a significant source of energy loss and reduces fuel cell ***,the need to use Pt in commercial Pt/C cathodes has restricted their large‐scale application in fuel cells because of its high cost and poor ***,improvements in the activity and durability of Pt‐based catalyst are required to reduce the amount of Pt required and,thus,costs,while increasing the ORR rate and fuel cell power density and promoting widespread PEMFC *** recent years,atomically ordered Pt‐based intermetallic nanocrystals have received tremendous attention owing to their excellent activity and stability for the ***,in this review,we first introduce the formation of intermetallic compounds from the perspective of thermodynamics and kinetics to lay a theoretical foundation for the design of these *** addition,optimization strategies for Pt‐based ordered intermetallic catalysts are summarized in terms of the catalyst composition,size,and ***,we conclude with a discussion of the current challenges and future prospects of Pt‐based ordered *** review is designed to help readers gain insights into the recent developments in and rational design of Pt‐based intermetallic nanocrystals for the ORR and encourage research that will enable the commercialization of PEMFCs.

关键词： Oxygen reduction reaction Fuel cell Pt‐based catalyst Intermetallic Electrocatalysis

Structural characteristics and drivers of greenhouse gas emissions at county-level and long-time scales:A case study of the Anji County,China

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Journal of Environmental Sciences 2024年第6期140卷 319-330页

作者： Zhouxiang Cai liting Hu Di Chen Ying Zhang Xuekun Fang College of Environmental&Resource Sciences Zhejiang UniversityHangzhou 310058China Center for Global Change Science Massachusetts Institute of TechnologyCambridgeMA 02139United States Anji Meteorological Bureau Anji 313300China

To achieve carbon neutrality,the Chinese government needs to gain a comprehensive understanding of the sources and drivers of greenhouse gas(GHG)emissions,particularly at the county *** County in eastern China is a typical example of an industrial transformation from quarrying to a low-carbon *** study analyzed the decoupling types and structural characteristics of GHG emissions and the driving factors of carbon dioxide(CO_(2))emissions in the Anji from 2006 to 2019,and explored the differences between countylevel and provincial-level or city-level *** was observed that energy-related activities are the main source of GHG emissions in Anji and that economic development is the driving factor behind the increasing CO_(2)***,industrial transformation and upgradation coupled with the alternative use of clean energy limit the growth of GHG *** study details the GHG emissions of county during the industrial transformation stage and provides corresponding policy recommendations for county governments.

关键词： County GHG emissions Decoupling Driving factors Policy recommendations

Assembling ionic liquid into porous molecular filler of mixed matrix membrane to trigger high gas permeability,selectivity,and stability for CO_(2)/CH_(4) separation

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Nano Research 2024年第5期17卷 4535-4543页

作者： liting Yu Liqin Hao yang Feng Jia Pang Mengwei Guo Liangjun Li Weidong Fan Lili Fan Rongming Wang Zixi Kang Daofeng Sun School of Materials Science and Engineering State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China College of Chemistry Nankai UniversityTianjin 300071China College of Chemistry and Chemical Engineering China University of Petroleum(East China)Qingdao 266580China College of New Energy China University of Petroleum(East China)Qingdao 266580China

As an emerging zero-dimensional nano crystalline porous material,porous organic cages(POCs)with soluble properties in organic solvents,are promising candidates as molecular fillers in mixed matrix membranes(MMMs).The pore structure of POCs should be adjusted to trigger efficient gas separation performance,and the interaction between filler and matrix should be *** this work,ionic liquid(IL)was introduced into the molecular fillers of CC3,to construct the IL@CC3/PIM-1 membrane to effectively separate CO_(2) from CH_(4).The advantages of doping IL include:(1)narrowing the cavity size of POCs from 4.4 to 3.9Åto enhance the diffusion selectivity,(2)strengthening the CO_(2) solubility to heighten the gas permeability,and(3)improving the compatibility between filler and matrix to upgrade membrane *** the optimization of the membrane composite,the IL@CC3/PIM-1-10%membrane possesses the CO_(2) permeability of 7868 Barrer and the CO_(2)/CH_(4) selectivity of 73.4,which compared to the CC3/PIM-1-10%membrane,improved by 15.9%and 106.2%,***,the membrane has maintained a stable separation performance at varied temperatures and pressures during the long-term *** proposed method offers an efficient way to improve the performance of POCs-based MMMs in gas separation.

关键词： porous organic cage mixed matrix membrane ionic liquid gas separation

A Residual Frequency Offset Estimation Method Based on Range Migration Fitting

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Journal of Beijing Institute of Technology 2024年第2期33卷 103-110页

作者： liting Zhang Hao Huan Ran Tao Xiaogang Tang School of Information and Electronics Beijing Institute of Technology School of Aerospace Information Space Engineering University

Recently, researchers have proposed an emitter localization method based on passive synthetic aperture. However, the unknown residual frequency offset(RFO) between the transmitter and the receiver causes the received Doppler signal to shift, which affects the localization accuracy. To solve this issue, this paper proposes a RFO estimation method based on range migration fitting. Due to the high frequency modulation slope of the linear frequency modulation(LFM)-modulation radar signal, it is not affected by RFO in range compression. Therefore, the azimuth time can be estimated by fitting the peak value position of the pulse compression in range ***, the matched filters are designed under different RFOs. When the zero-Doppler time obtained by the matched filters is consistent with the estimated azimuth time, the given RFO is the real RFO between the transceivers. The simulation results show that the estimation error of azimuth distance does not exceed 20 m when the received signal duration is not less than 3 s, the pulse repetition frequency(PRF) of the transmitter radar signal is not less than 1 k Hz, the range detection is not larger than 1 000 km, and the signal noise ratio(SNR) is not less than –5 d B.

关键词： range migration fitting (RMF) passive localization residual frequency offset (RFO)

重思卢卡奇与阿多诺关于现代主义的论争——基于虚无主义批判视角的分析

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现代哲学 2022年第5期 39-45页

作者：杨丽婷广东省社会科学院哲学与宗教研究所广州510635

卢卡奇与阿多诺关于现代主义的论争是西方马克思主义美学史上的重要事件。卢卡奇对现代主义的批判与阿多诺对现代主义的推崇形成强烈对比。从虚无主义批判视角看,在卢卡奇那里,现代主义是虚无主义的美学表现;而在阿多诺那里,现代主义是... 详细信息

卢卡奇与阿多诺关于现代主义的论争是西方马克思主义美学史上的重要事件。卢卡奇对现代主义的批判与阿多诺对现代主义的推崇形成强烈对比。从虚无主义批判视角看,在卢卡奇那里,现代主义是虚无主义的美学表现;而在阿多诺那里,现代主义是虚无主义的对抗性力量。卢卡奇与阿多诺承袭尼采与海德格尔的审美救赎,开拓了一条富有黑格尔-马克思主义色彩的独特路径。他们既批判性地回应了尼采与海德格尔的困境,也创造性地运用了马克思主义的思想资源;既有基于西方马克思主义传统的共识,也充分展示了各自的理论旨趣和个性色彩。从总体性的辩证法到否定的辩证法,审美救赎的黑格尔-马克思主义路径呈现了清晰的思想史图景。

关键词：现代主义虚无主义现实主义审美救赎辩证法

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有机马克思主义:富有解构性的“流量”思潮

广东社会科学 2023年第3期 62-69页

作者：杨丽婷广东省社会科学院哲学与宗教研究所广州510635

有机马克思主义在中国学界正式出场后迅速掀起“流量”效应,这与其所进行的“策略性”理论形态转变直接相关。中国特色哲学社会科学话语体系的建构和“四个自信”的夯实促使“有机马克思主义热”从早期阶段的“狂热期”进入后期阶段的... 详细信息

有机马克思主义在中国学界正式出场后迅速掀起“流量”效应,这与其所进行的“策略性”理论形态转变直接相关。中国特色哲学社会科学话语体系的建构和“四个自信”的夯实促使“有机马克思主义热”从早期阶段的“狂热期”进入后期阶段的“冷静期”。有机马克思主义本质上是一种具有浓厚神学色彩的建构性后现代主义思潮,其号称的所谓融合“中”“西”“马”的新范式只是一种简单外在的理论嫁接。该思潮以超越为名行解构之实,企图从历史观、方法论、价值取向、理论本质四个维度解构马克思主义,具有重大理论风险。

关键词：有机马克思主义过程哲学建构性的后现代主义

Enhanced visible-light photocatalytic hydrogen evolution using two-dimensional carbon nitride sheets with the removal of amine groups

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Chinese Chemical Letters 2024年第2期35卷 446-450页

作者： Yu Zhang liting Wu Shaopeng Wang Dingyi yang Huan Liang Yizhang Wu Jian Hao Youqing Wang Jianke Liu Yong Wang Department of Physics Shaanxi University of Science and TechnologyXi'an 710021China School of Advanced Materials and Nanotechnology Academy of Advanced Interdisciplinary ResearchXidian UniversityXi'an 710126China The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Xidian UniversityXi'an 710126China Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State MicrostructuresNanjing UniversityNanjing 210093China State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China

Two-dimensional(2D)carbon nitride sheets(CNs)with atomically thin structures are regarded as one of the most promising materials for solar energy ***,due to their substantially enlarged bandgap caused by the strong quantum size effect and their incomplete polymerisation with a large number of non-condensed surface amino groups,the practical applicability of CNs in photocatalysis is *** this study,CNs with broad visible-light absorption were synthesised using a 5-min fast thermal *** removal of uncondensed amine groups reduces the bandgap of CNs from 3.06 eV to 2.60 eV,increasing their absorption of visible ***,the CNs were distorted after annealing,which can differentiate the spatial positions of electrons and holes,enhancing the visible-light absorption *** a result,when exposed to visible light,the photocatalytic hydrogen production activity of atomically thin 2D CNs rose by 8.38 *** research presents a dependable and speedy method for creating highly effective visible-light photocatalysts with narrowed bandgaps and improved visible-light absorption.

关键词： 2D carbon nitride sheets Rapid thermal annealing DFT calculations Visible-light absorption visible-light photocatalysis

马克思与虚无主义批判:一种历史性的实践方案

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学术研究 2020年第7期 30-36,177页

作者：杨丽婷广东省习近平新时代中国特色社会主义思想研究中心广东广州510635 广东省社会科学院哲学与宗教研究所广东广州510635

马克思思想为虚无主义批判提供了重要资源。从思想发展的阶段性看,马克思的虚无主义批判在不同时期表现为不同的话语模式;从思想发展的整体性看,马克思提供了一种克服虚无主义的历史性实践方案。其意义有三点。第一,马克思从经济制度层... 详细信息

马克思思想为虚无主义批判提供了重要资源。从思想发展的阶段性看,马克思的虚无主义批判在不同时期表现为不同的话语模式;从思想发展的整体性看,马克思提供了一种克服虚无主义的历史性实践方案。其意义有三点。第一,马克思从经济制度层面揭示了虚无主义的深层根源。虚无主义的真正秘密不在精神史中,而在现实的物质生产关系中。资本逻辑是虚无主义产生的根本原因,资本主义是虚无主义的制度屏障。对虚无主义的反思和克服,是理论问题,更是实践问题。第二,马克思将虚无主义理解为历史性产物。虚无主义与克服虚无主义是历史性地交织在一起的。由此,克服虚无主义拥有了历史性的实践空间。第三,马克思将自我及其价值建构奠定于社会历史性的劳动实践基础之上,这使克服虚无主义成为切实的历史性实践活动。

关键词：虚无主义意识形态批判资本逻辑历史性实践