检索结果-内蒙古大学图书馆

Surface iodine and pyrenyl-graphdiyne co-modified Bi catalysts for highly efficient CO_(2) electroreduction in acidic electrolyte

引用

Nano research 2024年第4期17卷 2381-2387页

作者： Min Zhang Juan Wang Xin rong Xiu-Li Lu Tong-Bu Lu MOE International Joint Laboratory of Materials Microstructure Institute for New Energy Materials and Low Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

CO_(2) electroreduction to formic acid/formate would contribute to alleviating the energy and climate *** work reports a Bi-based catalyst derived from the in-situ electroreduction of Bi_(2)O_(2)CO_(3) modified with iodine and pyrenyl-graphdiyne(PGdY)on the surface for efficient electroreduction of CO_(2) in acidic electrolyte,with a high partial current density of 98.71 mA·cm^(-2) and high Faradaic efficiency(FE)>90%over the potential range from^(-1).2 to-1.5 V *** hydrogen electrode(rHE),as well as the long-term operational stability over 240 h without degradation in H-type *** results and density function theory calculations show that the synergistic effect of surface iodine and PGdY is responsible for this active and extremely stable process of CO_(2) electroreduction via lowering the energy barriers for formation of*OCHO intermediate,suppressing the competitive HEr by enhancing the concentration of both K+and CO_(2) at reaction interface,as well as preventing the dissolution and re-deposition of active Bi atoms on surface during catalytic *** work provides new insight into designing highly active and stable electrocatalysts for CO_(2) reduction.

关键词： CO_(2) reduction electrocatalysis Bi-based catalysts acidic electrolyte

来源：评论

学校读者我要写书评

暂无评论

Microstructure and room-temperature tensile property of Ti-5.7Al-4.0Sn-3.5Zr-0.4Mo-0.4Si-0.4Nb-1.0Ta-0.05C with near equiaxed β grain fabricated by laser directed energy deposition technique

引用

Journal of Materials Science & Technology 2022年第6期101卷 308-320页

作者： MengCheng deng Shang Sui Bo Yao Liang Ma Xin Lin Jing Chen State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design MIIT ChinaNorthwestern Polytechnical UniversityXi’an 710072China

Near-equiaxed β grain was achieved in the near-α Ti60(Ti-5.7Al-4.0Sn-3.5Zr-0.4Mo-0.4Si-0.4Nb-1.0Ta-0.05C) titanium alloy via laser directed energy deposition(LdEd). The microstructural evolution along the building direction and the room-temperature tensile properties along the horizontal and vertical directions(building direction) were systematically studied through SEM and OM. EBSd and Xrd were utilized to accurately demonstrate the texture of the α and β phases. The results showed that the α phase presented a low texture intensity, which was ascribed to the weak textured β grain with near-equiaxed morphology, since there are Burgers orientation relationships during the β →α transition. In addition, numerical simulation, combined with the CET curve of Ti60 alloy considering the effect of multi-composition,was utilized to elucidate the formation mechanism of the near-equiaxed β grains. Furthermore, according to the solidification theory, we proposed that the solidification temperature range ΔTfwas more accurate than the growth restriction factor Q in predicting the formation tendency of equiaxed β grain in different titanium alloys. Tensile results showed that the horizontal and vertical samples had similar strength,while the former exhibited larger elongation than the latter. The effect of the near-equiaxed β grain and the internal α phase on mechanical properties were revealed at last.

关键词： Laser directed energy deposition Near-αtitanium alloy Equiaxedβgrain room-temperature tensile property

来源：评论

学校读者我要写书评

暂无评论

Explainable reinforcement learning for enhancing personal thermal comfort and optimizing demand response in household multi-zone HVAC system

引用

Science China Technological Sciences 2025年第6期68卷 121-137页

作者： Yongxin SU Mengyao XU Xiao LIU Mao TAN rui WANG Chunhua YANG School of Automation and Electronic Information Xiangtan University Hunan National Center for Applied Mathematics Xiangtan University College of Systems Engineering National University of Defense Technology School of Automation Central South University

Heating, ventilation and air conditioning(HVAC) systems maintain personal thermal comfort(PTC) and serve as key demand response(dr) resources. Given the challenges of uncertain environments, varied user preferences, and legal requirements for transparent control strategies, this paper proposes an explainable reinforcement learning(XrL) solution for household multizone HVAC systems. This approach aims to optimize energy costs, ensure users' PTC, and maintain the explainability of the dr strategy under uncertainty. Firstly, an XrL-based optimization framework is proposed. The framework utilizes XrL's online learning capabilities to handle uncertainties and meet the PTC requirements of different zones while maintaining the explainability of the optimization strategy. Then, we propose an explainable proximal policy optimization(XPPO) algorithm as an instantiation of XrL for optimizing household multi-zone HVAC systems, using interpretable continuous control trees as actor networks of the XPPO. Moreover, we design state space, action space, reward, learning network, and learning algorithm of the XPPO in detail for the needs of HVAC operational optimization. Simulation results show that our method is explainable and thus can fulfill the requirements of the laws. At the same time, the proposed method consumes 22.4% less energy cost compared to scenarios without dr. Furthermore, the optimization of dr for a typical 4-zone household can be achieved within 15 min on an i7-12700 CPU.

关键词： HVAC explainable reinforcement learning demand response personal thermal comfort

来源：评论

学校读者我要写书评

暂无评论

Enhancement of potassium resistance of Ce-Ti oxide catalyst for NH_(3)-SCr reaction by modification with holmium

引用

Journal of rare Earths 2022年第1期40卷 49-56页

作者： Chaopeng duan ruitang Guo Yuanzhen Liu Guilin Wu Yufang Miao Jingwen Gu Weiguo Pan School of Energy Source and Mechanical Engineering Shanghai University of Electric PowerShanghai 200090China Shanghai Engineering Research Center of Power Generation Environment Protection Shanghai 200090China

Alkali metal K in exhaust gas has a deactivation effect on NH_(3)-SCr *** this work,it is discovered that the addition of Ho on CeTi catalyst can remarkably strengthen its K *** conclusions of Brunauer-Emmett-Teller(BET),X-ray diffraction(Xrd),X-ray photoelectron spectroscopy(XPS),NH_(3) temperature programmed desorption(NH_(3)-TPd)and H_(2)temperature programmed reduction(H_(2)-TPr)analyses demonstrate that the enhancement of K resistance mainly originates from its stronger surface acidity and redox capability,the higher concentration of Ce^(3+)species and surface chemisorbed *** situ drIFT analysis reveals that the introduction of Ho on CeTi can remarkably improve the adsorption of NH_(3) and NO_(x) species on catalyst surface,accompanied by the intensified reactivity of ad-NH_(3) species,which should also administer to improve the K resistance.

关键词： NH_(3)-SCr Ho Ce Ti oxide catalyst K resistance rare earths

来源：评论

学校读者我要写书评

暂无评论

The Application of Artificial Intelligence in Alzheimer’s research

引用

Tsinghua Science and Technology 2024年第1期29卷 13-33页

作者： Qing Zhao Hanrui Xu Jianqiang Li Faheem Akhtar rajput Liyan Qiao Faculty of Information Technology Beijing University of TechnologyBeijing 100124China School of Medicine Tsinghua UniversityBeijing 100084China Department of Computer Science Sukkur IBA UniversitySukkur 65200Pakistan Department of Neurology Tsinghua University Yuquan HospitalBeijing 100040China

Alzheimer's disease(Ad)is an irreversible and neurodegenerative disease that slowly impairs memory and neurocognitive function,but the etiology of Ad is still *** the explosive growth of electronic health data,the application of artificial inteligence(Al)in the healthcare setting provides excellent potential for exploring etiology and personalized treatment approaches,and improving the disease's diagnostic and prognostic *** paper first briefly introduces Al technologies and applications in medicine,and then presents a comprehensive review of Al in *** simple,it includes etiology discovery based on genetic data,computer-aided diagnosis(CAd),computer-aided prognosis(CAP)of Ad using multi-modality data(genetic,neuroimaging and linguistic data),and pharmacological or non-pharmacological approaches for treating ***,some popular publicly available Ad datasets are introduced,which are important for advancing Al technologies in Ad ***,core research challenges and future research directions are discussed.

关键词： Alzheimer's disease artificial intelligence etiology discovery computer-aided diagnosis computer-aided prognosis treatment

来源：评论

学校读者我要写书评

暂无评论

Optimization design of solid-state hydrogen storage device for fuel cell forklift

引用

JOUrNAL OF ALLOYS ANd COMPOUNdS 2024年 970卷

作者： Ye, Jianhua Jiang, Lijun Li, Zhinian Wang, Shumao Wang, Qi Luo, Man Wu, Yuanfang Guo, Xiumei Wu, Jianqun Zhang, Liyu Chen, Haitao Wu, rui GRINM Grp Co Ltd Natl Engn Res Ctr Nonferrous Met Mat & Prod New En Beijing 100088 Peoples R China GRINM Guangdong Inst Adv Mat & Technol Beijing 528000 Peoples R China GRIMAT Engn Inst Co Ltd Beijing 101407 Peoples R China Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China JustPower Technol Co Ltd Beijing 528000 Peoples R China

Solid-state hydrogen storage device using metal hydride have enormous advantages for fuel cell forklifts. In addition to high volume hydrogen storage density, the solid-state hydrogen storage device can also be used as a counterweight for the forklift. At the same time, the solid-state storage device has low hydrogen storage pressure and safety, and the fuel (H2) refueling is convenient and low-cost. In this paper, a two-dimensional heat and mass transfer numerical model has been developed to predicting the performance of the metal hydride tank filled with Ti0.9Zr0.1Cr0.35Mn1.4V0.2Fe0.05 alloy. The validity of this numerical model was tested by comparison with the experimental data of the metal hydride hydrogen storage tank with a hydrogen capacity of 1 kg, achieving a good agreement between all the data. And a solid-state hydrogen storage device with an effective hydrogen capacity of 1.5 kg is optimally designed for 3.5 T fuel cell forklift. The completion rate of hydrogen refueling in the solid -state hydrogen storage device will reach 97.6 % within 30 min, and continuously discharging over 1.5 kg H2 under flow rates of 150 SL/min and 250 SL/min. The optimized solid-state hydrogen storage device was inte-grated in a power module for 3.5 T fuel cell forklift which allows uninterrupted operation for at least 6 h 8 min under rated operation.

关键词： Metal hydride Solid -state hydrogen storage Fuel cell forklift Heat and mass transfer

来源：评论

学校读者我要写书评

暂无评论

Magnetized magma intrusions being sources of a weak and a strong lunar magnetic anomaly revealed by 3d distribution of magnetization

引用

Earth and Planetary Physics 2024年第5期8卷 711-727页

作者： HongYi Wang Shuo Yao ZeLin Li LiangHui Guo Jing Yang ChangLi Yao Yuan Fang ZhaoJin rong School of Geophysics and Information Technology Research Center of Lunar and Planetary Remote Sensing ExplorationChina University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Intraplate Volcanoes and Earthquakes(China University of Geosciences Beijing)Ministry of EducationBeijing 100083China Hebei University of Engineering Handan Hebei 056038China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

In this work,we aim to investigate the origin of the magnetic carriers in the lunar crust and the intensity of the ancient dynamo *** magnetization and depth range of magnetic carriers are studied under a weak and a strong magnetic anomaly in Mare Tranquillitatis and in Oceanus Procellarum,respectively,where the surface ages are 3.6 and 3.3 billion years.A sophisticated three-dimensional amplitude inversion software program from a geophysical survey is used to reconstruct the distributions of magnetization in the lunar *** no globally measured surface magnetic field exists for the Moon,a crustal magnetic anomaly model with a grid resolution of 0.2°is *** depth range of the magnetic source is fixed by the boundary identified by a relative criterion,which is 20%of the recovered maximum *** central burial depths of the magnetic carriers are approximately 15 km and 25 km under reiner Gamma and Mare Tranquillitatis,*** volumes of the two magnetic sources are at scales of 104 and 105 km3,*** aforementioned differences may imply a hotter crust under reiner Gamma than Mare Tranquillitatis by 3.3 billion *** results support the view that the magma intrusions magnetized by an ancient magnetic field could be the origin of magnetic anomalies under reiner Gamma and Mare *** with previous works,the maximum magnetization of 3 A/m under reiner Gamma supports the intensity of the field being several microteslas.

关键词： lunar magnetic anomaly 3d distribution of magnetization reiner Gamma Mare Tranquillitatis

来源：评论

学校读者我要写书评

暂无评论

distribution characteristics of microplastics in surface waters in the western Pacific Ocean

引用

Journal of Oceanology and Limnology 2025年第2期43卷 492-501页

作者： Cheng HUO Shoufeng ZHANG Ling QU Shuaichen JIN Cijia WANG Xiaoting CHU Maowei JU National Marine Environmental Monitoring Center Dalian 116023China

Microplastic contamination is considered a major threat to the marine *** microplastic pollution in the Pacific Ocean has been studied,its abundance,distribution,composition,and origin in the western Pacific Ocean remain ***,we investigated the abundance and distribution characteristics of microplastics in surface waters of the western Pacific Ocean and analyzed their potential *** show that microplastics were widespread in the western Pacific Ocean,with abundance ranging from 0.03 to 2.36 particles/m^(3)(average 0.37±0.47 particles/m^(3)).Fibers/filaments and fragments were the main shapes of microplastics(71.6%)and the most abundant microplastic size class was<1.0 mm(42.4%).Significant differences in microplastic abundance were observed in different regions,with the lowest abundance in the South China Sea(0.03 particles/m^(3))and highest abundance in the seamount area in the western Pacific Ocean(0.58 particles/m^(3)).This study provides baseline data and insights into the fate and transportation of microplastics in the western Pacific region.

关键词： microplastic western Pacific surface water distribution characteristic seamount area

来源：评论

学校读者我要写书评

暂无评论

Tailoring cryogenic thermal conductivity in EuTiO3-based magnetic refrigeration materials

引用

Journal of rare Earths 2025年第5期43卷 997-1002页

作者： Huicai Xie Jiaxin Jiang Hao Sun Zhenxing Li Jun Liu Junfeng Wang Zhaojun Mo Jun Shen Key Laboratory of Rare Earths Ganjiang Innovation AcademyChinese Academy of Sciences Jiangxi University of Science and Technology Department of Energy and Power Engineering School of Mechanical EngineeringBeijing Institute of Technology

As one of the core components of a magnetic refrigerator,magnetic refrigeration materials are expected to have not only a considerable magnetocaloric effect but also excellent thermal *** poor thermal conductivity of many competitive oxide-based magnetic refrigerants,exemplified by EuTiO3-based compounds,acts as a major limitation to their practical ***,improving the thermal conductivity of magnetic refrigeration materials has become a research emphasis of magnetic refrigeration in recent *** this work,a series of EuTiO3（ETO）/Cu composites with different copper additives was prepared using a solid-phase reaction method by introducing appropriate amounts of copper *** influence of the introduction of copper on the phase composition,microstructure,thermal conductivity,and magnetocaloric effect of the composites was systematically ***,the thermal conductivity of the composites is enhanced by up to 260% due to copper addition,accompanied by only a 5% decrease in magnetic entropy change and refrigerating *** additive forms localized thermal conductive networks and promotes the densification process,resulting in significantly enhanced thermal conductivity of the *** work demonstrates the feasibility of improving the thermal conductivity of oxide-base d magnetic refrigeration materials by introducing highly thermally conductive substances.

关键词： EuTiO3 Magnetic refrigeration rare earths Thermal conductive network Thermal conductivity

来源：评论

学校读者我要写书评

暂无评论

Modeling the potential distribution of Argentine shortfin squid in the southwest Atlantic Ocean

引用

Journal of Oceanology and Limnology 2025年第1期43卷 326-340页

作者： Hewei LIU Wei YU College of Marine Living Resource Sciences and Management Shanghai Ocean UniversityShanghai 201306China National Engineering Research Center for Oceanic Fisheries Shanghai Ocean UniversityShanghai 201306China Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources Ministry of EducationShanghai Ocean UniversityShanghai 201306China Key Laboratory of Oceanic Fisheries Exploration Ministry of Agriculture and Rural AffairsShanghai Ocean UniversityShanghai 201306China

The Argentine shortfin squid Illex argentinus is an economically important short-lived species widely distributed in the southwest Atlantic *** abundance and distribution of *** are associated with climate change and environmental *** potential distribution of *** was modeled with various environmental variables including sea surface temperature(SST),sea surface height(SSH),chlorophyll a,sea surface salinity(SSS),net primary productivity(NPP),mixed layer depth(MLd),eddy kinetic energy(EKE),and photosynthetically active radiation(PAr)using the maximum entropy(MaxEnt)approach during the peak fishing seasons(January–April).The habitat suitability index(HSI)was defined as the probability of species emergence from the MaxEnt model and the area of HSI≥0.6 was regarded as *** indicate that the predicted habitat correlated with the actual fishing position,with similar trends in the percentages of suitable habitats and catch per unit effort(CPUE)of *** from January to ***,SST,SSH,PAr,and MLd were identified critical environmental variables for the distribution of *** addition,the median of preferred ranges of the critical environmental variables were concentrated within the suitable habitats of *** Area under the receiver Operating Characteristic Curve(AUC)was greater than 0.96 for all four *** in latitudinal and longitudinal gravity centers(LATG and LONG)of fishing effort were consistent with latitudinal and longitudinal gravity centers(LATG_H and LONG_H)of the *** findings suggest that the MaxEnt model is an effective tool to predict the potential distribution of ***,SST,SSH,PAr,and MLd should be given with more extensive attention in predicting the potential distribution of ***,as they are important environmental indicators that can help decision-makers search for the fishing ground of *** in the Southwest Atlantic.

关键词： Illex argentinus maximum entropy model potential distribution oceanographic environmental condition

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：