检索结果-内蒙古大学图书馆

5th International Conference on Electronic Communication and Artificial Intelligence, ICECAI 2024

作者： Ma, Dongjin Gao, Yingcai Zhang, Lei Dai, Qin China Energy Science and Technology Research Institute Co. Ltd. State Key Lab. of Low-carbon Smart Coal-fired Power Generation and Ultra-clean Emission Nanjing China Shenyang Institute of Engineering Shenyang China

ISBN: (纸本)9798350386943

With the growing global interest in renewable energy, photovoltaic (PV) power generation has become an important form of energy. However, the prediction of PV power is still a challenge due to the uncertainty of factors such as weather. In this paper, we propose a PV power prediction model based on Long Short-Term Memory (LSTM) neural network, which aims to improve the prediction accuracy by learning the patterns and trends of historical data. © 2024 IEEE.

关键词： artificial intelligence long and short-term memory neural networks photovoltaic power generation renewable energy sources

来源：评论

学校读者我要写书评

暂无评论

Acetic acid-assisted mild dealloying of fine CuPd nanoalloys achieving compressive strain toward high-efficiency oxygen reduction and ethanol oxidation electrocatalysis

引用

Carbon Energy 2023年第7期5卷 112-120页

作者： Danye Liu Yu Zhang Hui Liu Peng Rao Lin Xu Dong Chen Xinlong Tian Jun Yang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijingChina State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikouChina Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials ScienceJiangsu Collaborative Innovation Centre of Biomedical Functional MaterialsNanjing Normal UniversityNanjingChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina Nanjing IPE Institute of Green Manufacturing Industry NanjingJiangsuChina

Dealloying by which the transition metal is partially or completely leached from an alloy precursor is an effective way to optimize the fundamental effects for further enhancing the electrocatalysis of a ***,to address the deficiencies associated with the commonly used dealloying methods,for example,electrochemical and sulfuric acid/nitric acid treatment,we report an acetic acid-assisted mild strategy to dealloy Cu atoms from the outer surface layers of CuPd alloy nanoparticles to achieve high-efficiency electrocatalysis for oxygen reduction and ethanol oxidation in an alkaline *** leaching of Cu atoms by acetic acid exerts an additional compressive strain effect on the surface layers and exposes more active Pd atoms,which is beneficial for boosting the catalytic performance of a dealloyed catalyst for the oxygen reduction reaction(ORR)and the ethanol oxidation reaction(EOR).In particular,for ORR,the CuPd nanoparticles with a Pd/Cu molar ratio of 2:1 after acetic dealloying show a half-wave potential of 0.912 V(***)and a mass activity of 0.213 AmgPd^(-1) at 0.9 V,respectively,while for EOR,the same dealloyed sample has a mass activity and a specific activity of 8.4 Amg^(-1) and 8.23 mA cm^(-2),respectively,much better than their dealloyed counterparts at other temperatures and commercial Pd/C as well as a Pt/C catalyst.

关键词： compressive strain effect dealloying electrocatalysis ethanol oxidation reaction oxygen reduction reaction

来源：评论

学校读者我要写书评

暂无评论

Influence Study of the Anisotropic Scattering and Solar Radiation on the Radiation Working Performance of Liquid Droplet Radiator

SSRN

引用

SSRN 2024年

作者： Fei, Yiheng Fu, Jianghan Wang, Chenglong Tian, Wenxi Guanghui, S.U. Qiu, Suizheng Department of Nuclear Science and Technology State Key Lab. of Multiphase Flow in Power Engineering Shaanxi Key Lab. of Advanced Nuclear Energy and Technology Xi’an Jiaotong University Xi’an710049 China

The Liquid Droplet Radiator (LDR), a lightweight frameless radiant heat rejection system, is widely regarded as the optimal heat rejection solution for megawatt-scale space nuclear power systems. The LDR dissipates heat to space through its droplet layer, which plays a crucial role in determining its radiative rejection capacity. Radiation beams undergo a series of emission, scattering, and absorption processes within the layer before being emitted into space. Prior studies typically assume isotropic scattering in this process. However, this study introduces a 3D model of the LDR layer based on Mie theory and Monte-Carlo methods to investigate the impact of anisotropic scattering and solar radiation. Our calculations reveal that the working fluid exhibits strong forward anisotropic scattering characteristics. Under the anisotropic assumption, the heat rejection capability of the LDR is 27-33% higher compared to the isotropic assumption. Regarding the temperature distribution within the LDR, under the anisotropic assumption, the layer's temperature is 6 K lower at the XY boundary surface and 3 K higher at the layer median, as opposed to the isotropic assumption. We introduce the concept of the probability of a light beam escape to elucidate the distinct beam transmission mechanisms and temperature distribution. When the distance between the LDR and the sun is in the vicinity of 1 AU, the impact of solar radiation on the LDR's ability to operate is on the order of 1E-5, which is almost negligible. This study provides a theoretical foundation for calculating the heat rejection capacity during the LDR design phase. © 2024, The Authors. All rights reserved.

关键词： Solar radiation

来源：评论

学校读者我要写书评

暂无评论

Analysis of Influence of Pre-bend Blade Shape on Aeroelastic Characteristics of Wind Turbine under Startup Condition 2

Analysis of Influence of Pre-bend Blade Shape on Aeroelastic...

引用

2023 2nd International Conference on Aerospace, Aerodynamics and Mechatronics engineering, AAME 2023

作者： Li, Qi Gao, Zhiying Inner Mongolia Autonomous Reg. Key Lab. of Wind Ener. and Solar Ener. Utiliz. Mechanism and Optimization College of Energy and Power Engineering Inner Mongolia University of Technology China

In this paper, a 2 MW wind turbine in the lab.ratory is taken as the research object, and the blades with pre-bending capacities of 2, 3, 4, and 5 m are designed, respectively, to study the influence of different pre-bending capacities on the aerodynamic elasticity of wind turbine under unstable operating conditions. Based on the professional simulation software of wind turbine multi-body dynamics, the parametric model with aero-elastic-control coupling is established, and the simulation calculation of different pre-bending blades is carried out. The results show that the aerodynamic deformation of the blade and the load at the blade root increase obviously with the increase of blade pre-bending. Under the starting condition of a wind turbine, larger blade pre-bending will lead to a significant increase in aerodynamic deformation of wind turbine blades under unstable operating conditions. It shows that the larger blade pre-bending amount will greatly increase the risk of aeroelastic instability of wind turbines under unstable operating conditions. © Published under licence by IOP Publishing Ltd.

关键词： Turbomachine blades

来源：评论

学校读者我要写书评

暂无评论

Investigations of Sodium Droplet Spreading and Evaporation on Surfaces with Different Wettability Based on Lattice Boltzmann Simulations

SSRN

引用

SSRN 2024年

作者： Tang, Songsheng Guo, Kailun Tian, Zhixing Wang, Mingjun Wang, Chenglong He, Xiaoqiang Su, Guanghui Qiu, Suizheng Tian, Wenxi School of Nuclear Science and Technology State Key Lab. of Multiphase Flow in Power Engineering Shaanxi Key Lab. of Advanced Nuclear Energy and Technology Xi’an Jiaotong University Shaanxi Xi’an710049 China Key Lab. of Nuclear Reactor System Design Technology China Nuclear Power Research and Design Institute Chengdu610213 China

The spreading and evaporation of sodium droplets is one of the fundamental phenomena in high-temperature heat pipes. The LBM sodium two-phase flow and phase transition model, which can simulate a huge liquid-vapor density ratio, is first established and validated. Then, the spreading and evaporation processes of sodium droplets on solid walls with different wettability are numerically simulated and analyzed. The main conclusions obtained are as follows: (1) The dimensionless spreading diameter and time of the droplet spreading process conforms to Tanner's power law, and the power exponent has exponential relationship with the equilibrium wetting angle;(2) The maximum dimensionless spreading diameter is negatively and linearly correlated with the equilibrium wetting angle;(3) Evaporation of sodium droplets under constant heat flow conditions shows a mixed pattern. The droplets will be detached from the droplet wall at the late stage of evaporation, and the larger the equilibrium wetting angle the sooner the droplets detach. © 2024, The Authors. All rights reserved.

关键词： Evaporation

来源：评论

学校读者我要写书评

暂无评论

A Numerical Simulation Study on Bubble Size Distribution in a Variable Diameter Pipeline based on CFD-PBM 43

A Numerical Simulation Study on Bubble Size Distribution in ...

引用

43rd Chinese Control Conference, CCC 2024

作者： Zhang, Lei Chen, Xu Shi, Jiamei Zhang, Xuyang Zhang, Shuo Dalian University of Technology The Key Lab. of Intelligent Contr. and Optimization for Indust. Equipment of Ministry of Education Dalian116024 China Electric Power Science Research Institute of State Grid Inner Mongolia East Electric Power CO. Ltd China China Kunlun Contracting & Engineering Corp China

ISBN: (纸本)9789887581581

This study aims to investigate the characteristics of bubble size distribution within a variable diameter pipeline. The pipeline is divided into five main sections: inlet section, contraction section, intermediate section, expansion section, and outlet section. A combination of numerical simulation and computational fluid dynamics (CFD) is employed to understand the impact of different pipe geometries on bubble behavior. This paper uses a set of boundary conditions and methods which are proven correct from an existing study for simulation. In the FLUENT 19.0 software, the Eulerian two-phase flow model combined with the standard k-varepsilon turbulence model is used to simulate the bubble size distribution within a pipe and the results were compared across different numerical methods: CM, QMOM, EQMOM, CQMOM, and ECQMOM. The combination is based on the inner mechanism in CFD solver. The significance of this study lies in its contribution to the common variable diameter pipeline systems in industrial processes. A deeper understanding of bubble dynamics is crucial for optimizing design and operation. This work not only provides new theoretical guidance for gas-liquid two-phase flow but also serves as a practical guide for chemical, petroleum, and other fields involving multiphase flow. © 2024 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Bubble columns

来源：评论

学校读者我要写书评

暂无评论

Surface bilateral profile measurement of curved transparent components based on chromatic confocal sensor 2

Surface bilateral profile measurement of curved transparent ...

引用

Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022

作者： Wu, Jiajun Jiang, Xiaoxiong Jiang, Lili Ju, Bingfeng Zhu, Wule Zhejiang University School of Mechanical Engineering The State Key Lab of Fluid Power Transmission and Control Hangzhou310027 China China State Shipbuilding Corporation Laboratory of Science and Technology on Marine Navigation and Control Tianjin300131 China

ISBN: (纸本)9781510661264

The system performance of many industrial products is dominated by the surface profile accuracy of their primary component, thus it is of great essence to achieve high precision profile characterization. The chromatic confocal technology provides an effective means for precise measurement of surface profile, yet there exists non-negligible errors when measuring transparent curved component. The aim of this paper is to investigate the effects of the curvature of component on the confocal rays and obtain its bilateral surface profile by chromatic confocal technology simultaneously. The assumption of tilted plate approximation for curved specimen was made. By adopting the optical ray tracing analysis, a modified model was then proposed to correct the measurement error existed in the traditional one. The validity of the proposed model is conducted by 2D bilateral profile measurements of the hemispherical shells after the calibration with tilted fused silica plates. Experimental results show that the proposed model significantly improves the measurement accuracy of bilateral profile of curved transparent components at large equivalent tilt angle. This method overcomes the drawbacks of other spatial coordinate based profile measurement methods, and achieves high accuracy simultaneous measurement of bilateral profile of transparent components. © 2023 SPIE.

关键词： Error correction

来源：评论

学校读者我要写书评

暂无评论

Research on a Simulation Method for Pumped Storage power Station Dam engineering Considering Terrain 3

Research on a Simulation Method for Pumped Storage Power Sta...

引用

3rd International Conference on New Energy and power engineering, ICNEPE 2023

作者： Wang, Qingzhong Hu, Shouchao Chang, Zengliang Zhao, Xiangwei Qiao, Hao Li, Kaihong Shandong Electric Power Engineering Consulting Institute Co. LTD. Jinan China Shandong University of Science and Technology Key Laboratory of Geomatics and Digital Technology of Shandong Province Qingdao China Shandong University of Science and Technology Qingdao Key Lab. of Beidou Navigation and Intelligent Spatial Information Technology Application Qingdao China

ISBN: (纸本)9798350393224

With the increasing demand for energy, pumped storage power plants have received widespread attention as a renewable energy storage solution. When designing and constructing dam projects for pumped storage power plants, it is necessary to fully consider terrain factors to ensure the safety and feasibility of the project. Based on this, this study proposes a simulation method for pumped storage power station dam engineering that takes into account terrain. This method emphasizes the terrain characteristics and covers the positioning, geometric construction, volume estimation of the dam body, and thickness estimation of the mountains on both sides of the dam for pumped storage power plants. Finally, a three-dimensional model of the pumped storage power plant dam that meets the requirements was successfully constructed. Provided important technical support for the planning and construction of pumped storage power station dam projects, and made positive contributions to the implementation of renewable energy storage solutions. © 2023 IEEE.

关键词： dam engineering pumped storage power station simulation methods terrain

来源：评论

学校读者我要写书评

暂无评论

Reactive template-derived interfacial engineering of CoP/CoO heterostructured porous nanotubes towards superior electrocatalytic hydrogen evolution

引用

Carbon Energy 2023年第1期5卷 194-205页

作者： Qixing Zhou Ruoxu Sun Yiping Ren Run Tian Jun Yang Huan Pang Kai Huang Xinlong Tian Lin Xu Yawen Tang School of Chemistry and Chemical Engineering Southeast UniversityNanjingJiangsuChina State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikouHainanChina Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials ScienceJiangsu Collaborative Innovation Center of Biomedical Functional MaterialsNanjing Normal UniversityNanjingJiangsuChina Nanjing IPE Institute of Green Manufacturing Industry NanjingJiangsuChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijingChina School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhouJiangsuChina

The development of economical,efficient,and robust electrocatalysts toward the hydrogen evolution reaction(HER)is highly imperative for the rapid advancement of renewable H2 energy-associated *** utilization of the heterointerface effect can endow the catalysts with remarkably boosted electrocatalytic performance due to the modified electronic state of active ***,we demonstrate deliberate crafting of CoP/CoO heterojunction porous nanotubes(abbreviated as CoP/CoO PNTs hereafter)using a self-sacrificial template-engaged *** control over the Kirkendall diffusion process of the presynthesized cobalt–aspartic acid complex nanowires is indispensable for the formation of CoP/CoO *** topochemical transformation strategy of the reactive templates enables uniform and maximized construction of CoP/CoO heterojunctions throughout all the porous *** establishment of CoP/CoO heterojunctions could considerably modify the electronic configuration of the active sites and also improve the electric conductivity,which endows the resultant CoP/CoO PNTs with enhanced intrinsic ***,the hollow and porous nanotube architectures allow sufficient accessibility of exterior/interior surfaces and molecular permeability,drastically promoting the reaction ***,when used as HER electrocatalysts,the well-designed CoP/CoO PNTs show Pt-like activity,with an overpotential of only 61 mV at 10mA cm^(−2) and excellent stability in 1.0M KOH medium,exceeding those of the vast majority of the previously reported nonprecious *** functional theory calculations further substantiate that the construction of CoP/CoO heterojunctions enables optimization of the Gibbs free energies for water adsorption and H adsorption,resulting in boosted HER intrinsic *** present study may provide in-depth insights into the fundamental mechanisms of heterojunction-induced electronic regulation,which may p

关键词： heterojunction hydrogen evolution reaction porous nanotubes reactive template

来源：评论

学校读者我要写书评

暂无评论

Optimal Model of Hydrogen Production Coupled Sewage Treatment from Renewable Energy for Hydrogen and Oxygen Utilization 10

Optimal Model of Hydrogen Production Coupled Sewage Treatmen...

引用

10th IEEE International power Electronics and Motion Control Conference, IPEMC 2024 ECCE Asia

作者： Qi, Sihang Hu, Kewei Wang, Zhan Ma, Ruodong Zhang, Yu Xiong, Binyu Wuhan University of Technology School of Automation Wuhan China Huazhong University of Science and Technology State Key Lab. of Adv. Electromagnetic Eng. and Technol. Sch. of Elec. and Electronic Engineering Wuhan China State Grid-Hubei-Electric Power Research Institute Wuhan China

ISBN: (纸本)9798350351330

To avoid the waste of oxygen, a byproduct of hydrogen production from electricity, this article proposes a new utilization scenario that combines renewable energy hydrogen production with sewage treatment, and supplies pure oxygen from hydrogen production to the aerobic aeration tank for sewage treatment. This scenario involves combining pure oxygen with air, achieving the optimal pure oxygen ratio through adjustment, and then being aerated by an aerator into an aerobic bioreactor. While achieving comprehensive utilization of hydrogen and oxygen, it greatly enhances the economy of renewable energy hydrogen production. A new application scenario for renewable energy hydrogen production is provided, and simulation results show that its daily operating cost is reduced by 67.5%. The energy consumption of the aerator is reduced by 28.5%, and the light rejection rate is reduced by 30%. © 2024 IEEE.

关键词： Oxygen

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：