检索结果-内蒙古大学图书馆

Application of recurrent Neural Networks for Predictive Modeling of Electrical Submersible Pumps in Oil Extraction

IFAC-PapersOnLine 2025年第1期59卷 49-54页

作者： Carine Menezes rebello Erbet Almeida Costa Odilon Santana Luiz de Abreu Galdir reges Vinicius Viena Tefilo Paiva Guimares Mendes Marcio Fontana Francisco raphael ribeiro Bacellar Marcos Pellegrini ribeiro Bernardo Pereira Foresti Leizer Schnitman Idelfonso B.r. Nogueira Department of Chemical Engineering Norwegian University of Science and Technology Norway Department of Chemical Engineering Federal University of Bahia Polytechnic School Bahia Brazil Department of Electrical and Computer Engineering Federal University of Bahia Polytechnic School Bahia Brazil CENPES Petrobras R&D Center Brazil Av. Horcio Macedo 950 Cid. Universitria Ilha do Fundo Rio de Janeiro Brazil

This study presents a mathematical modeling framework that leverages recurrent neural networks (rNNs), specifically echo state networks (ESNs) and long short-term memory (LSTM) architectures, for the predictive modeling of electrical submersible pumps (ESPs) in offshore oil extraction operations. Utilizing real operational data from an offshore oil field, the research addresses the inherent complexity and nonlinear dynamics of ESP systems by employing these recurrent structures to capture and represent the temporal dependencies within the data. Key challenges, such as data noise, variability, and limited diversity, are systematically tackled to ensure robust dynamic modeling. A comparative analysis evaluates the performance of ESN and LSTM models under these constrained data conditions, aiming to identify the superior model in terms of predictive accuracy and resilience. The modeling approach emphasizes the formulation, parameterization, and validation processes essential for effective ESP optimization and control in real-world industrial settings. Findings reveal the distinct strengths and limitations of each rNN variant when applied to offshore operational data.

关键词： Electrical submersible pumps echo state network long short-term memory predictive modeling real data

来源：评论

学校读者我要写书评

暂无评论

decoration of atomic PdxAuy (1 ≤ x + y ≤ 4) clusters on polyaniline in electrochemical sensing of 1-propanol

引用

Surface and Coatings technology 2024年 483卷

作者： Yoshida, Shohei Okamoto, Keisuke Kurioka, Tomoyuki Chen, Chun-Yi Chakraborty, Parthojit Lin, Yi-Feng Hsu, Yung-Jung Nakamoto, Takamichi Sone, Masato Chang, Tso-Fu Mark Institute of Innovative Research Tokyo Institute of Technology 4259 Nagatsuta-cho Midori-ku Yokohama226-8503 Japan Department of Chemical Engineering and R&D Center for Membrane Technology Chung Yuan Christian University 200 Chung Pei Rd. Chungli Taoyuan Taiwan Department of Materials Science and Engineering National Yang Ming Chiao TungUniversity Taiwan

Atomic PdxAuy (1 ≤ x + y ≤ 4) clusters are decorated on polyaniline to be used as the catalytic electrode in electrochemical sensors. The current responses in the oxidation of 1-propanol are used to reveal the catalytic activity. Effects of the size, decoration sequence, and composition of the atomic metal clusters decorated on the PANI on the catalytic activity are evaluated. regarding the size, an odd-even size effect is observed in the atomic pure metal clusters, which the even-numbered pure metal clusters show a higher catalytic activity than the odd-numbered pure metal clusters. For the decoration sequence, the catalytic activity is high when the same metal is decorated in the first two cycles of the cyclic atomic electrodeposition process. For the composition effect, the atomic metal clusters show a high catalytic activity in the oxidation, in the region of second oxidation peak, when there are more Au in the atomic metal clusters. © 2024 Elsevier B.V.

关键词： Catalyst activity

来源：评论

学校读者我要写书评

暂无评论

design Guidelines of Thermally Stable Hafnia Ferroelectrics for the Fabrication of 3d Memory devices

Design Guidelines of Thermally Stable Hafnia Ferroelectrics ...

引用

International Electron devices Meeting (IEdM)

作者： Giuk Kim Hunbeom Shin Taehyong Eom Minhyun Jung Taeho Kim Sangho Lee Minki Kim Yeongseok Jeong Ji-Sung Kim Kab-Jin Nam Bong Jin Kuh Sanghun Jeon School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Korea Semiconductor R&D Center Samsung Electronics Korea

ISBN: (纸本)9781665489607

We provide a methodology for designing thermally stable hafnia ferroelectric (FE) materials to be taken into account while fabricating 3d memory devices. We reveal the underlying origins for the thermal instability of hafnia FE materials in terms of kinetics and material science. Furthermore, we suggest adopting dopants whose ionic radius is smaller than Hf in the FE matrix as a feasible option to demonstrate a thermally stable hafnia FE material. Using this approach, robust ferroelectricity is achieved even at a subsequent thermal budget (TB) of 750 °C for 30 min. The improved thermal stability stems from the reduced formation of both the m-phase and oxygen vacancy (V O ) in hafnia FE materials at high TB. The in-depth electrical and material analysis in this study serves a framework for further research into the thermal stability of FE. This work contributes to the commercialization of FE devices by filling the gap between the functionality of FE materials and their process applicability for 3d devices.

关键词： Three-dimensional displays Capacitors Thermal engineering doping Switches Thermal conductivity Iron

来源：评论

学校读者我要写书评

暂无评论

Strategy of preparing SmCo based films with high coercivity and remanence ratio achieved by temperature and chemical optimization

引用

Journal of rare Earths 2024年第7期42卷 1289-1297,I0004页

作者： Yansong Gong Zhaoguo Qiu Sizhe Liang Xinrui Zheng Hongxia Meng Zhigang Zheng deyang Chen Shengfu Yuan Weixing Xia dechang Zeng J.P.Liu School of Materials Science and Engineering South China University of TechnologyGuangzhou510640China Zhongshan R&D Center for Materials Surface and Thin Films Technology of the South China University of Technology Gent Materials Surface Technology(Guangdong)Co.Ltd.Zhongshan528437China Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China Yangjiang Branch Guangdong Laboratory Materials Science and Technology Yangjiang Advanced Alloys LaboratoryYangjiang529500China Laboratory of Rare-Earth Magnetic Functional Materials Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo315201China Department of Physics University of Texas at ArlingtonArlingtonTX76019USA

SmCo based films with excellent intrinsic magnetic properties have promising applications in micro-electro-mechanical system(MEMS).However,due to the complexity of phase composition and uncontrollable crystallization degree of SmCo hard magnetic phase in the film,both the coercivity(Hc)and remanence(Mr)of films are difficult to enhance *** this paper,SmCo based films were deposited with a Cr underlayer and capping layer on single crystal Si substrates via magnetron sputtering *** effects of annealing parameters and Sm/Co atomic ratio on the phase structure and coercivity of films are *** adjusting the Sm/Co atomic ratio from 1:5 to 1:4,Co soft magnetic phase disappears and the single phase SmCo5 is obtained,leading to the increase of coercivity of the films from 30 to 34 *** influence of deposition temperature and Cu doping on magnetic properties of SmCo based films was *** the deposition temperature increases from room temperature to 250℃,the coercivity will further increase from 34 to 51 ***,a severe kink is observed in the demagnetization curves due to the poor exchanged *** analysis of transmission electron microscopy(TEM)confirms that the average size of non-hard magnetic amorphous phase exceeds the effective exchanged coupling length of SmCo5,which contributes to the decoupling and low remanence ***,doping Cu and applying a post-annealing process can significantly improve the crystallization degree of the *** the coercivity and the remanence ratio of the demagnetization curves are greatly *** propose a plausible strategy to prepare the SmCo based films with high coercivity and remanence ratio by temperature and chemical optimization,which can be utilized in high performed MEMS devices.

关键词： rare earths SmCo based films Phase composition Crystallization conditions Coercivity remanence ratio

来源：评论

学校读者我要写书评

暂无评论

Ultrathin thin-film composite membrane integrated with MoS2 conjugated with thiol ligands for isopropanol dehydration by pervaporation

引用

Journal of Membrane Science 2023年第1期683卷

作者： Gallardo, Marwin r. Ang, Micah Belle Marie Yap Millare, Jeremiah C. Li, Chi-Lan Tsai, Hui-An Huang, Shu-Hsien Lee, Kueir-rarn R&D Center for Membrane Technology and Department of Chemical Engineering Chung Yuan Christian University Taoyuan32023 Taiwan School of Chemical Biological and Materials Engineering and Sciences Mapúa University Manila1002 Philippines Department of Chemical and Materials Engineering National Ilan University Yilan26047 Taiwan

In recent years, transition metal dichalcogenides (TMds) have garnered much significant attention for their potential in fabricating high-performance membranes and applications in water treatment. In the present study, molybdenum disulfide (MoS2) nanosheets were modified using organic thiols to synthesize amino, hydroxyl, and carboxyl-functionalized MoS2. These modified nanosheets were subsequently integrated into polyamide matrix to develop thin-film nanocomposite (TFN) membranes for dehydration of isopropanol-water mixtures through pervaporation. A comprehensive examination of the impact of incorporating functionalized MoS2 on the physical and chemical properties and separation performance of the resulting TFN membranes was carried out. Embedding MoS2 created a bumpy structure with protuberances on the membrane surface. Amine groups from the modified MoS2 played a crucial role in crosslinking with trimesoyl chloride during interfacial polymerization, contributing to an enhanced crosslinking degree in the membrane. Compared with the pristine membrane, hydroxyl and carboxyl-modified MoS2, the TFN membrane incorporated with amine-modified MoS2 exhibited the highest separation performance with total flux of 1438 g m−2 h−1 and water content in permeate of 99.37 wt% for separating 70 wt% isopropanol aqueous solution. remarkably, the TFN membrane exhibited a robust performance under high operating temperatures and high feed water concentrations, demonstrating its resilience in challenging conditions. Furthermore, the membrane exhibited stable long-term operational performance, highlighting its potential for pervaporation dehydration applications in the industry. The insights gained from this study contribute to the ongoing development of advanced membrane technologies based on TMds. © 2023 Elsevier B.V.

关键词： Pervaporation

来源：评论

学校读者我要写书评

暂无评论

recent progress of Pd/zeolite as passive NO_(x) adsorber: Adsorption chemistry, structure-performance relationships, challenges and prospects

引用

Chinese Chemical Letters 2022年第3期33卷 1169-1179页

作者： Ce Bian dan Li Qian Liu Shoute Zhang Lei Pang Zhu Luo Yanbing Guo Zhen Chen Tao Li Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China DongFeng Trucks R&D Center Wuhan 430056China Key Laboratory of Pesticide and Chemical Biology of Ministry of Education Institute of Environmental and Applied ChemistryCollege of ChemistryCentral China Normal UniversityWuhan 430079China

due to the technology limitation and inferior deNO_(x) efficiency of urea selective catalytic reduction (SCr) catalysts at low temperatures, passive NO_(x) adsorber (PNA) for decrease of NO_(x), CO and hydrocarbons (HCs) during “cold start” of vehicles was proposed to meet the further tighten NO_(x) emission regulations in future. Among them, Pd modified zeolite PNA materials have received more attention because of their excellent NO_(x) storage capacity, anti-poisoning and hydrothermal stability and since Pd/zeolite PNA was proposed, a variety of advanced characterization methods have been applied to investigate its adsorption behavior and structure-performance relationship. The comprehension of the active sites and adsorption chemistry of Pd/zeolite PNA was also significantly improved. However, there are few reviews that systematically summarize the recent progress and application challenges in atomic-level understanding of this material. In this review, we summarized the latest research progress of Pd/zeolite PNA, including active adsorption sites, adsorption mechanism, material physicochemical properties, preparation methods, storage and release performance and structure-performance relationships. In addition, the deactivation challenges faced by Pd/zeolite PNA in practical applications, such as chemical poisoning, high temperature hydrothermal aging deactivation, etc., were also discussed at the micro-level, and some possible effective countermeasures are given. Besides, some possible improvements and research hotspots were put forward, which could be helpful for designing and constructing more efficient PNA materials for meeting the ultra-low NO_(x) emission regulation in the future.

关键词： Emission control Pd/zeolite Passive NO_(x)adsorber NO_(x)storage Cold start

来源：评论

学校读者我要写书评

暂无评论

research on signalized intersection mixed traffic flow platoon control method considering Backward-looking effect

arXiv

引用

arXiv 2024年

作者： Feng, Binghao Guo, Hui Ma, Minghui Wu, Yuepeng Liang, Shidong Wang, Yansong School of Mechanical and Automotive Engineering Shanghai University of Engineering Science Shanghai201620 China Shanghai Intelligent and Connected Vehicle R&D Center Co. Ltd. Shanghai201499 China Business School University of Shanghai for Science and Technology Shanghai200093 China

Connected and Autonomous Vehicles (CAVs) technology facilitates the advancement of intelligent transportation. However, intelligent control techniques for mixed traffic flow at signalized intersections involving both CAVs and Human-driven Vehicles (HdVs) require further investigation into the impact of backward-looking effect. This paper proposes the concept of "1+n+1" mixed platoon considering the backward-looking effect, consisting of one leading CAV, n following HdVs, and one trailing CAV. The leading and trailing CAVs collectively guide the movement of intermediate HdVs at intersections, forming an optimal control framework for platoon-based CAVs at signalized intersections. Initially, a linearized dynamic model for the "1+n+1" mixed platoon is established and compared with a benchmark model focusing solely on controlling the lead vehicle. Subsequently, constraints are formulated for the optimal control framework, aiming to enhance overall intersection traffic efficiency and fuel economy by directly controlling the leading and trailing CAVs in the platoon. Finally, extensive numerical simulations compare vehicle throughput and fuel consumption at signalized intersections under different mixed platoon control methods, validating that considering both front and backward-looking effects in the mixed platoon control method outperforms traditional methods focusing solely on the lead CAV. Copyright © 2024, The Authors. All rights reserved.

关键词： Autonomous vehicles

来源：评论

学校读者我要写书评

暂无评论

Preparation of thin-film nanocomposite membrane with alkali-treated nanozeolite to improve the dehydration performance of alcohol solution

引用

Journal of the Taiwan Institute of Chemical Engineers 2023年第1期147卷

作者： Chu, Min-Yi Ang, Micah Belle Marie Yap Millare, Jeremiah C. Huang, Shu-Hsien Li, Chi-Lan Tsai, Hui-An Lee, Kueir-rarn R&D Center for Membrane Technology and Department of Chemical Engineering Chung Yuan Christian University Taoyuan32023 Taiwan School of Chemical Biological Materials Engineering and Sciences Mapúa University Manila1002 Philippines Department of Chemical and Materials Engineering National Ilan University Yilan26047 Taiwan

Background: Thin-film nanocomposite (TFN) membrane separates water from alcohols effectively. However, during fabrication of TFN membrane, the dispersion of inorganic nanoparticle in the solvent media limits its used. Methods: Nanozeolite, a natural inorganic particle, was modified through alkaline treatment using NaOH or NaHCO3. Both alkaline indeed improved the dispersion of nanozeolite in trimesoyl chloride (TMC)/n-hexane solution. TFN membrane had been prepared through interfacial polymerization of diethylenetriamine (dETA) and TMC, forming a thin selective polyamide layer on top of hydrolyzed polyacrylonitrile (mPAN) support. Significant findings: The pore size of the nanozeolite was also enlarged due to the etching by the alkaline. Nanozeolite modified with NaHCO3 was dispersed well in the membrane surface, thus increasing its membrane efficiency. At the optimum preparation condition, 0.2 wt% NZ-NaHCO3 treated using 1 M NaHCO3, the TFN[sbnd]NZ-NaHCO3 exhibited the highest flux of 1,869 g∙m2∙h−1 with 99% water concentration in permeate. Furthermore, the modified membrane had a stable performance for long-term, as well as at different operating temperature and alcohol concentration in the feed. Therefore, the right concentration and type of alkaline could improve the property of nanozeolite for preparing high pervaporation membrane. © 2023 Taiwan Institute of Chemical Engineers

关键词： Polymerization

来源：评论

学校读者我要写书评

暂无评论

deep hole connector design and oil film pressure study 64

Deep hole connector design and oil film pressure study

引用

64th International Conference on Vibroengineering

作者： Chen, Zhenya Ma, Zhuoqiang Li, Xiang Miao, Hongbing Yang, Shangjin Li, Jian School of Mechanical Engineering North University of China Taiyuan030051 China 713 Research Institute of China Shipbuilding Industry Corporation Zhengzhou450015 China Shanxi Provincial Key Laboratory of Intelligent Equipment Technology in Harsh Environment Taiyuan030051 China Inner Mongolia North Heavy Industry Group Co. Ltd. Nanjing R&D Center Nanjing211100 China

Aiming at the problem of insufficient rigidity of the tool system and unbalanced radial force during deep hole machining, this paper designs a deep hole connector using the fluid dynamic pressure lubrication principle. The deep hole connector includes double-bridge strain gauges and tiltable tiles, which can increase the rigidity of the tool system by using the oil film support stiffness and offset the unbalanced radial force of synchronous detection by adjusting the oil film pressure in real time. First, the mathematical model of tiltable tile is established, the oil film thickness formula is derived, and the formula of oil film pressure is derived. Then, based on Fluent software, the fluid simulation of the deep hole connector is carried out. The simulation adopts a single-factor experiment method, and the change law of oil film pressure on tiltable tile is analyzed under different conditions, respectively. The results show that during deep hole machining, the oil film pressure can be adjusted by adjusting the parameters of workpiece speed, cutting fluid viscosity, tile tilt angle, and tile wrap angle, and then achieve the purpose of increasing the rigidity of the tool system and offsetting the unbalanced radial force. © 2023 JVE International. All rights reserved.

关键词： Lubrication

来源：评论

学校读者我要写书评

暂无评论

Advanced Hardware-In-The-Loop System for Guidance and Navigation Control Systems of Autonomous Underwater Vehicle

Advanced Hardware-In-The-Loop System for Guidance and Naviga...

引用

OCEANS

作者： Moon Hwan Kim Teasuk Yoo Kyungwon Nam Dept. of EE Engineering Yonsei University Seoul South Korea Maritime R&D Center LIG Nex1 Seongnam South Korea Agency for Defense Development Maritime Technology Research Institute Jinhae South Korea

ISBN: (数字)9798350362077

ISBN: (纸本)9798350362084

The integration of hardware and software, specifically the Guidance and Navigation Control (GNC) system, is cru-cial for achieving underwater positioning in autonomous systems like Autonomous Underwater Vehicles (AUVs). In our study, we present a novel Hardware-in-the-Loop System (HILS) framework that differs from traditional component-based approaches. This framework enables real-time interaction with the GNC loop, incorporates GPS simulation to enhance navigation accuracy, and utilizes an inertial measurement unit(IMU) and a Flight Motion Simulator (FMS) to capture real-time attitude dynamics. By connecting to a real-Time Computer, it effectively communicates with the AUV's GNC loop, taking into consideration actuator latency. Our experiments demonstrate the system's precision and dependability, establishing it as an innovative tool for AUV research and setting a precedent for future advancements.

关键词： Autonomous underwater vehicles Frequency modulation Three-dimensional displays Navigation Control systems real-time systems Software

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：