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Poly(heptazine imide)nanocrystal for hydrogen peroxide evolution in the dark by accumulating photo-generated electrons

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Nano Research 2024年第9期17卷 8036-8044页

作者： Song Kou Shu Lian Xiaodong Xie wei ren Yu Jin Jiahui Bao Honghui Ou Guidong Yang XJTU-Oxford International Joint Laboratory for Catalysis School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049China Fujian-Taiwan-Hongkong-Macao Science and Technology Cooperation Base of Intelligent Pharmaceutics Institute of OceanographyCollege of Materials and Chemical EngineeringMinjiang UniversityFuzhou 350108China School of Food and Bioengineering Fujian Polytechnic Normal UniversityFuqing 350300China

Organic conjugated polymers have received extensive attention due to their unique electronic ***,there have been relatively few reports on the dark photocatalytic reactions utilizing organic conjugated ***,we report the successful synthesis of an organic conjugated polymer based on poly(heptazine imide)nanocrystals(CNNCs)for H_(2)O_(2)evolution and biomedical applications using a simple salt molten method and sonication-centrifugation *** results show that these colloid CNNCs have the characteristics of photogenerated electrons accumulation and realize dark photocatalysis with high reducibility under visible light ***,these accumulating photogenerated electrons can reduce O_(2)in darkness to produce H_(2)O_(2).In addition,cytotoxicity tests were conducted and it was found that H_(2)O_(2)produced under dark conditions could oxidize L-arginine(L-Arg)to NO,which effectively killed tumors in the *** work provides an important strategy to construct organic conjugated semiconductor nanocrystals and applying them to future energy and biomedical fields.

关键词： poly(heptazine imide) photocatalysis photogenerated electrons hydrogen peroxide evolution cancer treatment

An Innovative Coupled Common-Node Discrete Element Method-Smoothed Particle Hydrodynamics Model Developed with LS-DYNA and Its Applications

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China Ocean Engineering 2024年第3期38卷 467-482页

作者： SHEN Zhong-xiang WANG Wen-qing XU Cheng-yue LUO Jia-xin LIU ren-wei School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China

In this study,a common-node DEM-SPH coupling model based on the shared node method is proposed,and a fluid–structure coupling method using the common-node discrete element method-smoothed particle hydrodynamics(DS-SPH)method is developed using LS-DYNA *** DEM and SPH are established on the same node to create common-node DEM-SPH particles,allowing for fluid–structure *** simulations of various scenarios,including water entry of a rigid sphere,dam-break propagation over wet beds,impact on an ice plate floating on water and ice accumulation on offshore structures,are *** interaction between DS particles and SPH fluid and the crack generation mechanism and expansion characteristics of the ice plate under the interaction of structure and fluid are also *** results are compared with available data to verify the proposed coupling ***,the simulation results demonstrated that controlling the cutoff pressure of internal SPH particles could effectively control particle splashing during ice crushing failure.

关键词： common-node DEM-SPH fluid-structure interaction discrete element method smoothed particle hydrodynamics

Finite-size-induced non-Hermitian phase transitions in real space

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Science China(Physics,Mechanics & Astronomy) 2024年

作者： Hongfei Wang Biye Xie wei ren Department of Physics International Center for Quantum and Molecular Structures Shanghai University School of Science and Engineering The Chinese University of Hong Kong

While non-Hermiticity provokes intriguing phenomena without Hermitian counterparts, e.g., the skin effect and the breakdown of bulk-boundary correspondence, attracting extensive attention both in fundamental physics and device engineering, the role of finite sizes therein remains elusive. Here, we propose a class of finite-size-induced non-Hermitian phase transitions, relying upon higher-order topological invariants associated with real-space wave functions. The phase diagrams for general non-Hermitian chiral models are further acquired to demonstrate our topological definition. Such phase transitions are elucidated qualitatively by an effective intercell coupling alteration that depends on finite sizes in respective directions. Besides, we mimic these phenomena by analogizing the circuit Laplacian in finite-size electric circuits with nonreciprocal couplings. The resultant admittance spectra agree with our theoretical predictions. Our findings shed light on the finite-size mechanism of non-Hermitian topological phase transitions and pave the way for applications in switching and sensing.

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IL13RA2 promotes progression of infantile haemangioma by activating glycolysis and the Wnt/β-catenin signaling pathway

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Oncology Research 2024年第9期32卷 1453-1465页

作者： ZIYONG LIU TAO MA JINFANG LI wei ren ZHIXIN ZHANG Department of Cardiothoracic Surgery 970th Hospital of the People’s Liberation ArmyWeihai264209China Department of Cardiac Ultrasound Weihai Municipal HospitalWeihai264200China

Background:Interleukin 13 receptor subunit alpha 2(IL13RA2)plays an essential role in the progression of many ***,the role of IL13RA2 in infantile haemangioma(IH)is still *** and Methods:IL13RA2 expression in IH tissues was analyzed using western blot,qRT-PCR,and *** role of IL13RA2 in haemangioma-derived endothelial cells(HemECs)was determined following knockdown or overexpression of IL13RA2 using CCK-8,colony formation,apoptosis,wound healing,tubule formation,Transwell,and western ***:IL13RA2 expression was upregulated in IH ***13RA2 overexpression promoted proliferation,migration,and invasion of HemECs and induced glycolysis,which was confirmed with a glycolysis ***,IL13RA2 interacted withβ-catenin and activated the Wnt/β-catenin pathway in HemECs,which were involved in the above-mentioned effects of ***:These findings revealed that targeting IL13RA2 is a potential therapeutic approach for IH.

关键词： Infantile haemangioma IL13RA2 Glycolysis Wnt/β-catenin pathway

New roles of research data infrastructure in research paradigm evolution

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Journal of Data and Information Science 2024年第2期9卷 104-119页

作者： Yizhan Li Lu Dong Xiaoxiao Fan ren wei Shijie Guo Wenzhen Ma Zexia Li National Library Science Chinese Academy of SciencesBeijing 100190China Department of Information Resources Management School of Economics and ManagementUniversity of Chinese Academy of SciencesBeijing100190China Bureau of Facility Support and Budget Chinese Academy of SciencesBeijing 100864China

Research data infrastructures form the cornerstone in both cyber and physical spaces,driving the progression of the data-intensive scientific research *** opinion paper presents an overview of global research data infrastructure,drawing insights from national roadmaps and strategic documents related to research data *** emphasizes the pivotal role of research data infrastructures by delineating four new missions aimed at positioning them at the core of the current scientific research and communication *** four new missions of research data infrastructures are:(1)as a pioneer,to transcend the disciplinary border and address complex,cutting-edge scientific and social challenges with problem-and data-oriented insights;(2)as an architect,to establish a digital,intelligent,flexible research and knowledge services environment;(3)as a platform,to foster the high-end academic communication;(4)as a coordinator,to balance scientific openness with ethics needs.

关键词： Research data infrastructure Landscape Data-centric Problem-oriented

Hierarchical Controller Synthesis Under Linear Temporal Logic Specifications Using Dynamic Quantization

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IEEE/CAA Journal of Automatica Sinica 2024年第10期11卷 2082-2098页

作者： wei ren Zhuo-Rui Pan weiguo Xia Xi-Ming Sun the Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of Technology the School of Control Science and Engineering Dalian University of Technology

Linear temporal logic(LTL) is an intuitive and expressive language to specify complex control tasks, and how to design an efficient control strategy for LTL specification is still a challenge. In this paper, we implement the dynamic quantization technique to propose a novel hierarchical control strategy for nonlinear control systems under LTL specifications. Based on the regions of interest involved in the LTL formula, an accepting path is derived first to provide a high-level solution for the controller synthesis problem. Second, we develop a dynamic quantization based approach to verify the realization of the accepting *** realization verification results in the necessity of the controller design and a sequence of quantization regions for the controller design. Third, the techniques of dynamic quantization and abstraction-based control are combined together to establish the local-to-global control strategy. Both abstraction construction and controller design are local and dynamic, thereby resulting in the potential reduction of the computational complexity. Since each quantization region can be considered locally and individually,the proposed hierarchical mechanism is more efficient and can solve much larger problems than many existing methods. Finally,the proposed control strategy is illustrated via two examples from the path planning and tracking problems of mobile robots.

关键词： Abstraction-based control design dynamic quantization formal methods linear temporal logic (LTL)

焊接方法对X90管道环焊接头断裂韧性的影响

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焊接学报 2024年第3期45卷 32-42,I0004,I0005页

作者：任伟帅健中国石油大学北京102249

为准确获取X90环焊接头的断裂韧性,采用改进的规则化法对X90环焊接头的低约束单边缺口拉伸试件进行断裂韧性测试,分别从手工焊、自保护药芯半自动焊和气保护药芯半自动焊焊接的X90管道环焊接头中提取测试试件,进行断裂韧性试验.结果表明... 详细信息

为准确获取X90环焊接头的断裂韧性,采用改进的规则化法对X90环焊接头的低约束单边缺口拉伸试件进行断裂韧性测试,分别从手工焊、自保护药芯半自动焊和气保护药芯半自动焊焊接的X90管道环焊接头中提取测试试件,进行断裂韧性试验.结果表明,相同焊接方法下,浅裂纹试件所得阻力曲线比深裂纹试件所得阻力曲线低;热影响区的深裂纹试件具有最高的裂纹扩展阻力曲线,而热影响区的浅裂纹试件具有最低的裂纹扩展阻力曲线;焊缝区试件在试验中极易发生脆断,具有相对较差的断裂性能,并且受焊接方法影响较大,其中气保护药芯焊丝半自动焊的焊缝区试件全部发生脆断.因此,气保护药芯焊丝半自动焊在实际X90管道工程应用中作为参考方法需要优化,这对保持X90管道结构的完整性至关重要.

关键词：焊接方法环焊接头低约束试件阻力曲线断裂韧性

革命如何教育?——红军的政治课程与政治教材

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史林 2024年第1期 191-204,220页

作者：任伟中共中央党校党史部 100091

政治教育是中共革命取得胜利的要因,而政治课则是政治教育的核心手段。中共通过精心设计教材与讲授方法,不仅让课堂变得有趣生动,更重要的是让思想深入人心,打造出了一支有主义的军队。在此过程中,阐明理论,进而把日常行为提升到理论层... 详细信息

政治教育是中共革命取得胜利的要因,而政治课则是政治教育的核心手段。中共通过精心设计教材与讲授方法,不仅让课堂变得有趣生动,更重要的是让思想深入人心,打造出了一支有主义的军队。在此过程中,阐明理论,进而把日常行为提升到理论层次,赋予其更高的意义,是红军政治课的一大诉求。这也契合中共强调的“理论与实践相结合”,即用理论指导实践,让群众超越日常生活,把自身行为纳入更大的历史进程中去,从而进一步激发行动。以后见之明观之,革命时期的政治课堂基本达到了预期目的。

关键词：政治教育政治课红军革命教材

Convenient room-temperature synthesis of sulfur and nitrogen co-doped NiCo-LDH coupled with CNTs on NiCo foam as battery-type electrode for high performance hybrid supercapacitor

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Rare Metals 2024年第9期43卷 4286-4301页

作者： Li Song Xiao-Hong Zhong Fang-Lin Wang Zhi-Hui Huang Zhe Hong Yun-Fang Gao Hai-Dong Wang Jian-wei ren Sheng-Jie Peng Lei Li College of Biological Chemical Sciences and EngineeringJiaxing University College of Chemical Engineering Zhejiang University of Technology College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Research and Development Department Jiangxi Ganfeng Li Energy Technology Co.Ltd. Department of Mechanical Engineering Science University of Johannesburg

The convenient synthesis of the composite electrode with high supercapacitance performance plays an important role in practical application but is ***, the carbon nanotubes（CNTs） coupled with lowcrystalline sulfur and nitrogen co-doped Ni Co-LDH（denoted as SN-Ni Co-LDH） nanosheets array are grown on Ni Co foam（NCF） substrate by two convenient steps of metal induced self-assembly and corrosion engineering,which present the advantages of operating at roomtemperature and low preparation costs. Benefiting from the S–N co-doping and low-crystallinity of Ni Co-LDH, the prepared SN-Ni Co-LDH@CNTs@NCF electrode presents a topping charge capacity of 2470 C·g-1(4.94 C·cm-2) at 5 m A·cm-2. Furthermore, the fabricated asymmetry supercapacitor（ASC） achieves an extraordinary energy density of 77 Wh·kg-1(0.617 m Wh·cm-2) at a power density of 438 W·kg-1(3.5 m W·cm-2) and outstanding stability(91% capacity retention after 5000 cycles at20 m A·cm-2). Impressively, the structure evolution of Ni Co-LDH during the charge/discharge processes has been thoroughly elucidated by in-situ Raman spectra. Therefore,this work verifies a powerful strategy and practical value for preparing composite electrodes with high supercapacitance performance, and also provides guidance for the rational design of the smart electrodes.

关键词： Carbon nanotubes Convenient synthesis NiCo-LDH Sulfur and nitrogen co-doped Supercapacitor