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Effective strategies to promote Z(S)-scheme photocatalytic water splitting

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Chinese Chemical Letters 2024年第3期35卷 27-39页

作者： Ye Yuan Junan Pan weinan Yin Haoxuan Yu Fengshun Wang Weifeng Hu Longlu Wang Dafeng Yan College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China College of Chemistry and Chemical Engineering Hubei UniversityWuhan 430062China

Artificial Z(S)-scheme photocatalytic water splitting systems have attracted extensive attention due to their advantages such as wide light absorption range,high charge separation efficiency and strong carrier redox ***,it is still challenging to design and prepare Z(S)-scheme photocatalysts with low-cost and highly stability for efficiently photocatalytic overall water splitting using solar *** review mainly introduces various strategies to improve the photocatalytic water splitting performance of Z(S)-scheme *** strategies mainly focus on enhancing or extending the range of light absorption,promoting charge separation,and enhancing surface redox reaction in Z(S)-scheme ***,the main challenges of Z(S)-scheme photocatalytic water splitting systems and their future development directions are pointed *** review would be beneficial to understanding the challenges and opportunities faced by the research field of Z(S)-scheme photocatalytic systems,and has important guiding significance for the development and utilization of high-performance Z(S)-scheme photocatalytic reaction system in the future.

关键词： Z(S)-scheme Overall water splitting Light absorption Charge separation Loading co-catalyst

Advanced development of grain boundaries in TMDs from fundamentals to hydrogen evolution application

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Chinese Chemical Letters 2024年第5期35卷 117-129页

作者： Ziyang Yin Lingbin Xie weinan Yin Ting Zhi Kang Chen Junan Pan Yingbo Zhang Jingwen Li Longlu Wang College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)Nanjing 210023China Institute of Advanced Materials(IAM)&Institute of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)Nanjing 210023China

Grain boundary(GB),as a kind of lattice defect,widely exists in two-dimensional transition metal dichalcogenides(2D TMDs),which has complex and diverse influences on the physical/chemical properties of 2D *** are universally considered to be a double-edged sword,although some electrical and mechanical properties of 2D TMDs would be adversely affected leading to the reduced overall quality,certain structure-oriented applications could be realized based on its unique *** this review,we first detailed the atomic structure characteristics of GBs and the corresponding techniques,then we systematically summarized the methods of introducing GBs into 2D ***,we expounded unique electrical,mechanical,and chemical properties of the GBs in 2D TMDs and clarified its internal relationship with the atomic ***,the application of GB structure in hydrogen evolution reaction(HER)is also *** the end,we make a conclusion and put forward outlooks,hoping to further promote the basic research of GB and boost the wide application of 2D TMDs.

关键词： Grain boundary Transition metal dichalcogenides Two-dimensional materials Hydrogen evolution reaction Dislocation Molybdenum disulfide

An Empirical Study on Google Research Football Multi-agent Scenarios

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Machine Intelligence Research 2024年第3期21卷 549-570页

作者： Yan Song He Jiang Zheng Tian Haifeng Zhang Yingping Zhang Jiangcheng Zhu Zonghong Dai weinan Zhang Jun Wang Institute of Automation Chinese Academy of SciencesBeijing100190China Digital Brain Lab Shanghai200001China ShanghaiTech University Shanghai200001China Huawei Cloud Guiyang550003China Shanghai Jiao Tong University Shanghai200001China University College London LondonWC1E 6PTUK

Few multi-agent reinforcement learning (MARL) researches on Google research football (GRF) focus on the 11-vs-11 multi-agent full-game scenario and to the best of our knowledge, no open benchmark on this scenario has been released to the public. In this work, we fill the gap by providing a population-based MARL training pipeline and hyperparameter settings on multi-agent football scenario that outperforms the bot with difficulty 1.0 from scratch within 2 million steps. Our experiments serve as a reference for the expected performance of independent proximal policy optimization (IPPO), a state-of-the-art multi-agent reinforcement learning algorithm where each agent tries to maximize its own policy independently across various training configurations. Meanwhile, we release our training framework Light-MALib which extends the MALib codebase by distributed and asynchronous implementation with additional analytical tools for football games. Finally, we provide guidance for building strong football AI with population-based training and release diverse pretrained policies for benchmarking. The goal is to provide the community with a head start for whoever experiment their works on GRF and a simple-to-use population-based training framework for further improving their agents through self-play. The implementation is available at https://***/Shanghai-Digital-Brain-Laboratory/DB-Football.

关键词： Multi-agent reinforcement learning(RL) distributed RL system population-based training reward shaping game theory

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动脉粥样硬化与脑梗死的临床观察

实用医技杂志 2005年第9A期12卷 2428-2429页

作者：姚春霞唐晓君邢亚莉刘春梅渭南市第二医院陕西渭南714000

目的:观察脑梗死患者颈动脉粥样硬化情况。方法:采用颈动脉血管超声检查。结果:80例脑梗死病例,62例颈动脉粥样硬化,斑块形成,12例未发现斑块,发生率为77.5%,颈动脉粥样硬化斑块左侧发生率高于右侧,斑块好发于分叉处,在各型中软斑与溃... 详细信息

目的:观察脑梗死患者颈动脉粥样硬化情况。方法:采用颈动脉血管超声检查。结果:80例脑梗死病例,62例颈动脉粥样硬化,斑块形成,12例未发现斑块,发生率为77.5%,颈动脉粥样硬化斑块左侧发生率高于右侧,斑块好发于分叉处,在各型中软斑与溃疡斑是脑梗死的主要来源之一。结论:颈动脉超声检查,不仅可以对已发生的脑栓塞患者提供各项有重要价值的指标,而且对无症状期动脉粥样硬化患者的监测,以及早期采取有效的防治,同样具有重要的意义。

关键词：脑梗死颈动脉超声颈动脉粥样硬化

Research Progress of Additives to Improve Hydration Resistance of Magnesia-calcium Materials

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China's Refractories 2024年第1期33卷 28-33页

作者： ZANG weinan LUAN Jian WANG Chunyan MIAO Zhenhua LI Jia HAN Haopeng School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051China

Magnesia-calcium materials have stable hot performance,good resistance to the erosion and corrosion of liquid steel and steel slag,and a special role in purifying liquid steel,so they are widely used in iron and steel ***,hydration of magnesia-calcium materials seriously restricts their use,so researches have been done to improve their hydration resistance,obtaining a series of *** this paper,the improvements on the hydration resistance of magnesia-calcium materials by additives in recent 20 years were presented,and their mechanisms were summarized.

关键词： additives magnesia-calcium materials hydration resistance

Study on Sealing Characteristics of Sliding Seal Assembly of Aircraft Hydraulic Actuator

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Instrumentation 2024年第1期11卷 18-29页

作者： weinan Li Saixin Shi Hongxia Tang Liang Chen Jiawei Zhang Hao Tang Jianhua Zhao Shijiazhuang Haishan Industrial Development Corporation Shijiazhuang 050200 China Heavy Machinery Fluid Power Transmission and Control Laboratory Yanshan UniversityQinhuangdao 066004China

The hydraulic actuator,known as the"muscle"of military aircraft,is responsible for flight attitude adjustment,trajectory control,braking turn,landing gear retracting and other actions,which directly affect its flight efficiency and ***,the sealing assembly often has the situation of over-aberrant aperture fit clearance or critical over-aberrant clearance,which increases the failure probability and degree of movable seal failure,and directly affects the flight efficiency and safety of military *** this paper,the simulation model of hydraulic actuator seal combination is established by ANSYS software,and the sealing principle is *** change curve of contact width and contact pressure of combination seal under the action of high-pressure fluid is *** effects of different oil pressure,fit clearance and other parameters on the sealing performance are ***,the accelerated life test of sliding seal components is carried out on the hydraulic actuator accelerated life test rig,and the surface morphology is compared and *** research shows that the O-ring is the main sealing element and the role of the check ring is to protect and support the O-ring to prevent damage caused by squeezing into the fit clearance,so the check ring bears a large load and is prone to shear *** fit clearance is the main factor affecting the damage of the check ring,and the damage parts are mainly concentrated at the edge of the sealing *** paper provides a theoretical basis for the design of hydraulic actuator and the improvement of sealing performance.

关键词： hydraulic actuator contact stress sealing characteristics maximum shear stress

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Impacts of Global Warming on Patterns of Temperature Change in China

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Journal of Mountain Science 2009年第4期6卷 405-410页

作者： LU Aigang Environment and Life Sciences Weinan Teachers University Weinan 714000 Shaanxi China

Global climate change has a wide range ofimpacts,and this paper presents an investigation onhow global warming has changed the relationshipbetween air temperature and latitude & altitude usingthe meteorological data obtained from 160 stations inChina. The investigation indicates that there are verydistinct seasonal differences in patterns of tempera-ture variation as a function of latitude and altitude:avery significant latitude effect in winter and a verysignificant altitude effect in summer. However,withglobal warming,the latitude effect in winter isweakening and the altitude effect in summer isstrengthening. This pattern of change in therelationship between temperature and latitude &altitude is helpful in efforts to reconstruct and explainthe past temperature patterns and variations.

关键词： Global warming Latitude effect Altitude effect China

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AI助力打造科学研究新范式

中国科学院院刊 2024年第1期39卷 10-16页

作者：鄂维南北京大学北京100871 北京科学智能研究院北京100084

科学研究的目的是发现基本原理和解决实际问题。尽管人类在发现基本原理和解决实际问题上已经取得了巨大成就,但有效工具和有效科研组织模式的缺乏仍然是制约科研效率的主要瓶颈。人工智能(AI)的迅速发展为改变这种状况提供了新的可能... 详细信息

科学研究的目的是发现基本原理和解决实际问题。尽管人类在发现基本原理和解决实际问题上已经取得了巨大成就,但有效工具和有效科研组织模式的缺乏仍然是制约科研效率的主要瓶颈。人工智能(AI)的迅速发展为改变这种状况提供了新的可能。近年来,深度学习方法在科学研究领域大放异彩,不仅助力解决了一些核心科学问题,扩展了科学方法,也开始带动科学研究从传统的“作坊模式”转向“平台模式”。目前,我国已在人工智能驱动的科学(AI for Science)领域打下良好基础,应把握机遇,争取引领科技创新,为人类的科技发展作出贡献。

关键词：人工智能驱动的科学研究科学计算安卓模式

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Thermal oxide synthesis and characterization of Fe_3O_4 nanorods and Fe_2O_3 nanowires

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Science China Chemistry 2009年第5期52卷 599-604页

作者： JIAO Hua1,2 & YANG HeQing1 1 Key Laboratory of Macromolecular Science of shaanxi Province, School of Chemistry and Materials Science, shaanxi Normal University, Xi’an 710062, China 2 Department of Chemistry and Chemical Engineering, weinan Teacher’s University, weinan 714000, China Key Laboratory of Macromolecular Science of shaanxi Province School of Chemistry and Materials Science Shaanxi Normal University Xi’an China Department of Chemistry and Chemical Engineering Weinan Teacher’s University Weinan China

Fe3O4 nanorods and Fe2O3 nanowires have been synthesized through a simple thermal oxide reaction of Fe with C2H2O4 solution at 200-600℃ for 1 h in the air. The morphology and structure of Fe3O4 nanorods and Fe2O3 nanowires were detected with powder X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The influence of temperature on the morphology development was experimentally investigated. The results show that the polycrystals Fe3O4 nanorods with cubic structure and the average diameter of 0.5-0.8 μm grow after reaction at 200-500℃ for 1 h in the air. When the temperature was 600℃, the samples completely became Fe2O3 nanowires with hexagonal structure. It was found that C2H2O4 molecules had a significant effect on the formation of Fe3O4 nanorods. A possible mechanism was also proposed to account for the growth of these Fe3O4 nanorods.

关键词： thermal oxide process nanorods nanowires C2H2O4 iron sheet