检索结果-南通市图书馆

Artificial-intelligent-powered safety.and efficiency.improvement for controlling and scheduling in integrated railway.sy.tems

在线全文

学校读者我要写书评

暂无评论

High-speed Railway 2024年第3期2卷 172-179页

作者： Liu J. Liu G. Wang y. Zhang W. Beijing National Railway.Research & Design Institute of Signal & Communication Group Co. Ltd Beijing 100070 China Engineering Research Center of Railway.Industry.of Intelligent and Autonomous Train Control Beijing 100070 China

The multi-mode integrated railway.sy.tem, anchored by.the high-speed railway. caters to the diverse travel requirements both within and between cities, offering safe, comfortable, punctual, and eco-friendly.transportation services. With the expansion of the railway.networks, enhancing the efficiency.and safety.of the comprehensive sy.tem has become a crucial issue in the advanced development of railway.transportation. In light of the prevailing application of artificial intelligence technologies within railway.sy.tems, this study.leverages large model technology.characterized by.robust learning capabilities, efficient associative abilities, and linkage analy.is to propose an Artificial-intelligent (AI)-powered railway.control and dispatching sy.tem. This sy.tem is elaborately.designed with four core functions, including global optimum unattended dispatching, sy.ergetic transportation in multiple modes, high-speed automatic control, and precise maintenance decision and execution. The deploy.ent pathway.and essential tasks of the sy.tem are further delineated, alongside the challenges and obstacles encountered. The AI-powered sy.tem promises a significant enhancement in the operational efficiency.and safety.of the composite railway.sy.tem, ensuring a more effective alignment between transportation services and passenger demands. © 2024 Beijing Jiaotong University

关键词： Artificial intelligence High-speed railway Large-scale mode, sy.tem framework Multi-mode railway.sy.tem Safety.and efficiency.improvement

Selective photosy.thesis of imines from biomass-derived aldehy.es over Ni/TiO_(2)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第3期43卷 1116-1124页

作者： Wu-lin Li Qing-Qing Zhang lin Dong Wen-Jun Zhang Li-Li lin Zu-Peng Chen Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing210037China Institute of Industrial Cataly.is State Key Laboratory of Green Chemistry Synthesis TechnologyCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou310014China

Photocataly.ic reductive amination of biomass-derived aldehy.es is a desirable way.to selectively.upgrade biomass into value-added nitrogen-containing chemicals under mild ***,it is challenging to produce imines in high selectivity.because of the undesirable side reactions caused by.the activity.of functional ***,we demonstrate the highly.reactive and selective production of imines from biomass derived aldehy.es via the photocataly.ic reductive amination,using a defective TiO_(2)supported nickel *** employ.ent of methanol as the hy.rogen donor and ammonia solution as the nitrogen source avoids the use of high-pressure H_(2)and expensive amines,rendering the current cataly.ic process safe,economical,and environmentally.*** depth investigations attribute the improved separation and transfer of photogenerated charge carriers to the presence of oxy.en vacancies and decorated Ni nanoparticles,thereby.accelerating the production of imines from benzaldehy.e amination(conversion,95.8%;seleetivity.95.2%).Furthermore,the developed sy.tem could be easily.translated to the photocataly.ic conversions of various biomass derived aldehy.es,which provided an example of a cost-effective and sustainable approach for the valorization of biomass derived feedstocks.

关键词： Photocataly.is Biomass derivatives Imines Reduction amination Heterogeneous cataly.t

A two-field-scan harmonic Hall voltage analy.is for fast,accurate quantification of spin-orbit torques in magnetic heterostructures

在线全文

学校读者我要写书评

暂无评论

Science China(Phy.ics,Mechanics & Astronomy. 2024年第10期67卷 105-112页

作者： Xin lin Lijun Zhu State Key.Laboratory.of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China

We report on the development of a“two-field-scan”harmonic Hall voltage(HHV)analy.is,which collects the second HHVas a function of a swept in-plane magnetic field at 45°and 0°relative to the excitation current,for the determination of the spin-orbit torques of transverse spins in magnetic heterostructures without significant perpendicular spins,longitudinal spins,and longitudinal/perpendicular Oersted *** demonstrate that this two-field-scan analy.is is as accurate as the well-established but time-consuming angle-scan HHV analy.is even in the presence of considerable thermoelectric effects but takes more than a factor of 7 less measurement *** also show that the fit of the HHV data from a single field scan at 0°,which is commonly.employ.d in the literature,is not reliable because the employ.ent of too many.free parameters in the fitting of the very.slowly.vary.ng HHV signal allows erroneous conclusion about the spin-orbit torque efficiencies.

关键词： spin-orbit torque spin current spin-orbit coupling spintronics

同方期刊数据库

A classification scheme for inorganic cluster compounds based on their electronic structures and bonding characteristics

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2024年第5期43卷 30-37页

作者： Zheny.ng lin Department of Chemistry The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongPR China

A novel classification scheme for inorganic cluster compounds is presented based on the characteristics of their electronic *** the classification scheme,five distinct categories have been introduced,including Jellium clusters,Wadian clusters,electron-precise clusters,π-donor ligated metal-metal bonded clusters,and antiferro-magnetically.coupled high-spin metal clusters.

关键词： Inorganic cluster compounds Structure and bonding Electron counting rules Superatomic clusters

New advances in the study.of Tethy.n Geody.amic Sy.tem

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第3期67卷 874-878页

作者： lin DING State Key.Laboratory.of Tibetan Plateau Earth Sy.tem Science(LATPES) Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China

Tethy.n Ocean was initially.proposed by.Austrian geologist Eduard Suess in 1893. The study.of the Tethy.n evolution by.European geologists has led to the development of modern geology. but not to the establishment of plate tectonics theory.Trümpy. 2001). With the progress in various studies, the concept of Tethy. has evolved from a Mesozoic ocean into three long-term evolving oceans:Proto-Tethy., Paleo-Tethy., and Neo-Tethy. (Figure 1), and their life cy.les cover the entire Phanerozoic era (Wu et al., 2020).

关键词： geology Mesozoic ocean

Hole-Selective Contact with Molecularly.Tailorable Reactivity.for Passivating High-Performing Inverted Perovskite Solar Cells

在线全文

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第7期6卷 1654-1661页

作者： Wenlin Jiang y.ngie Hu Fengzhu Li Francis R.lin Alex K-y.Jen Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong China 999077 Department of Chemistry City University of Hong KongKowloonHong Kong China 999077 Hong Kong Institute for Clean Energy City University of Hong KongKowloonHong Kong China 999077 State Key.Laboratory.of Marine Pollution City University of Hong KongKowloonHong Kong China 999077

The precisely.customizable attributes of self-assembled monolay.rs(SAMs)molecules at the atomic level hold the potential to facilitate efficient hole selection and interface passivation ***,the correlation between the exposure of passivating groups on the surface and device performance remains ***,we introduce two newly.designed SAM molecules,Cbz2S and Cbz2SMe,incorporating cy.lic disulfide or two flanking thiomethy.s by.modify.ng the 4,5-position of carbazole to adjust the Lewis basicity.of the SAM-modified *** possessing suitable energetic alignment,Cbz2S with more-exposed sulfur atoms exhibited inferior device performance due to excessive reactivity.leading to an overpopulation of PbI2 cry.tallites at the buried perovskite *** contrast,the screening effect from the methy. groups of Cbz2SMe optimized SAM reactivity.exquisitely.integrating buried interface passivation and hole selection ***,the champion inverted perovskite solar cell(PSC)employ.ng Cbz2SMe achieved an impressive power conversion efficiency.of 24.42%,accompanied by.prolonged *** work demonstrates the feasibility.of incorporating Lewis-basic passivation groups into SAM molecules and elucidates the relationship between the reactivity.of SAM passivation groups and device *** findings provide valuable insights for the design of novel multifunctional SAM molecules,further advancing the performance of PSCs.

关键词： self-assembled monolay.r perovskite solar cell hole-selective lay.r carbazole derivatives defect passivation

Optimal structural design for a certain near-space composite propeller of airship using adaptive region division blending model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2024年第5期37卷 301-316页

作者： Weigang AN Tiany. lin Shigen WANG School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China

Near-space airship is a frontier and hotspot in current military.research and development,and the near-space composite propeller is the key.technology.for its *** order to obtain higher aerody.amic efficiency.at an altitude of 22 km,a certain near-space composite propeller is designed as a long and slender aerody.amic shape with a 10 m diameter,which brings many.challenges to the composite structure *** initial design is obtained by.the composite structure variable stiffness design method using based on fixed region division blending ***,it weighs 23.142 kg,exceeding the required 20 *** order to meet the structural design requirements of the propeller,a variable stiffness design method using the adaptive region division blending model is proposed in this *** with the methods using the fixed region division blending model,this method optimizes region division,stacking thickness and stacking sequence in a single level,considering the coupling effect among *** a more refined region division,this method can provide a more optimal design for composite tapered ***,to improve the efficiency.of optimization subjected to manufacturing constraints,a hierarchical penalty.function is proposed to quickly.filter out the solutions that do not meet manufacturing *** above methods combined with a Genetic Algorithm(GA)using specific encoding are adopted to optimize the near-space composite *** optimal design of the structure weighs 18.831 kg,with all manufacturing constraints and all structural response constraints being *** with the initial design,the optimal design has a more refined region division,and achieves a weight reduction of 18.6%.This demonstrates that a refined region division can significantly.improve the mechanical performance of the composite tapered structure.

关键词： Structural optimization Composite tapered structure Genetic algorithm Adaptive region division Manufacturing constraint Near-space composite propeller

Self-assembly.of tau fragments as a key.pathologic event in tauopathies

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第12期19卷 2565-2566页

作者： ly.Thi Huong Luu Le Jung Hoon Lee Min Jae Lee Department of Biochemistry.and Molecular Biology Seoul National University College of MedicineSeoulKorea

Tau protein is encoded by.the microtubuleassociated protein tau(MAPT)gene and stabilizes microtubules in the *** has unique biophy.ical properties that make it both highly.water-soluble and positively.*** tau is an intrinsically.disordered protein lacking defined secondary.structures,it can acquire highly.organized-sheet structures and stack into a filamentous inclusion such as a paired helical filament(PHF).

关键词： tau pathologic assembly

JR East aims for driverless Shinkansen operation

在线全文

学校读者我要写书评

暂无评论

High-speed Railway 2024年第3期2卷 197-201页

作者： Suzuki y. Mobility.Service Department Railway Business Headquarters East Japan Railway Company Shibuya-ku Tokyo 151-8578 Japan

East Japan Railway.Company.(JR East) is aiming to “realize driverless train operation” as one of the key.measures to respond to rapid changes in the business environment. Currently. Automatic Train Operation (ATO) equipment is not installed on the Shinkansen, but there are plans to introduce ATO or driverless operation in the near future. From 2018–2021, the Ministry.of Land, Infrastructure, Transport and Tourism (MLIT) held the “ATO Technology.Study.Group for Railway.” in which the concept of technical requirements necessary.for driverless operation was discussed. In 2021, JR East conducted the GOA4 demonstration test on the Joetsu Shinkansen. In this test, we were able to confirm the basic functions of Shinkansen vehicles such as automatic departure control, speed control, fixed position stop control, and remote stop control using ATO. We aim to realize unattended operation (GOA4) for deadhead trains between Niigata Station and the Niigata Shinkansen Rolling Stock Center by.the end of the 2020 s, and driverless operation (GOA3) for passenger trains of the Joetsu Shinkansen by.the mid-2030s and continue to develop the necessary.technologies and build sy.tems. © 2024 The Authors

关键词： ATO Automatic train operation Driverless operation GOA3 High-speed railway Shinkansen