检索结果-内蒙古大学图书馆

2021 International Conference on Information, Cybernetics, and Computational Social Systems, ICCSS 2021

作者： Zheng, Mingkai Liu, Kaixin Li, Nanxin Yao, Yuan Liu, Yi Zhejiang University of Technology Institute of Process Equipment and Control Engineering Hangzhou310023 China China E-Port Information Data Center Shanghai Branch Shanghai200120 China National Tsing Hua University Department of Chemical Engineering Hsinchu30013 Taiwan

ISBN: (纸本)9781665402453

Infrared thermography (IRT) is an efficient non-destructive testing technique, which is widely applied in defect detection of polymer composites. However, the nonlinear nature of the thermographic data and the adverse effects of noise and inhomogeneous background prevent IRT from delivering satisfactory results. A novel deep autoencoder thermography (DAT) method is developed to enhance the contrast between defects and background. The multi-layer structure of the deep autoencoder is used to extract the features. Then, the results of the middle-hidden layer are visualized to show the effects of removing noise and uneven background. As a result, the defect is highlighted in the visualized images. The feasibility of the DAT method is verified using the experiment of carbon fiber reinforced polymer specimen. © 2021 IEEE.

关键词： Nondestructive examination

来源：评论

学校读者我要写书评

暂无评论

Hydrodynamics of heterogeneous particle swarms in gas-liquid-solid stirred tanks with free surface studied by DEM-VOF

引用

Powder technology 2025年 462卷

作者： E, Dianyu Wen, Yingming Wu, Yiliu Li, Jing Sun, Weifu Liu, Yonggang Chen, Chao Cui, Jiaxin Qiu, Yinxuan Jiangxi Provincial Key Laboratory of Particle Technology Jiangxi University of Science and Technology Nanchang330013 China Research Centre for Intelligent Mineral Processing & Metallurgy International Institute for Innovation Jiangxi University of Science and Technology Nanchang330013 China ARC Research Hub for Smart Process Design and Control Department of Chemical and Biological Engineering Monash University VIC3800 Australia School of Civil Engineering Southeast University Nanjing211189 China Advanced Technology Research Institute Beijing Institute of Technology Jinan250307 China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou341000 China Xinyu Iron and Steel Group Co. Ltd Xinyu338001 China College of Materials Science and Engineering Taiyuan University of Technology Taiyuan030024 China School of Chemical Engineering The University of Queensland QLD4072 Australia

Stirred tanks play a pivotal role in material blending, yet there is still a lack of data on inner complex blending mechanism, especially involving heterogeneous particle swarm with different shape combinations. This study extensively develops the DEM-VOF model, in which different drag force models are applied based on the identification of particle shapes. It aims to provide an insight into the blending system dynamics of heterogeneous particle swarms through seven arranged particle schemes building upon three different shapes. The results show that the oblate-prolate ellipsoid particle scheme has the optimal suspension performance, but demonstrates high power consumption. The addition of spherical particles into the oblate-prolate ellipsoid particle scheme has significant effect on particle suspension, fluid flow and the evolution of free surface, while contributes to a reduction in power consumption. This study presents an analysis of the hydrodynamics and optimization of blending systems involving heterogeneous particle swarms in stirred tanks. © 2025 Elsevier B.V.

关键词： Flow of gases

来源：评论

学校读者我要写书评

暂无评论

Resilient control of Networked control Systems With Hidden DoS Attacks and Unknown Observation Probability

引用

IEEE Transactions on control of Network Systems 2025年

作者： Wang, Yuan Yan, Huaicheng Park, Ju H. Zhang, Hao Shen, Hao East China University of Science and Technology School of Information Science and Engineering Shanghai200237 China Suzhou University of Science and Technology School of Electronic and Information Engineering Suzhou215009 China East China University of Science and Technology Key Laboratory of Smart Manufacturing in Energy Chemical Process of Ministry of Education Shanghai200237 China Weifang University College of Machinery and Automation Weifang261061 China Yeungnam University Department of Electrical Engineering Gyeongsan38541 Korea Republic of Tongji University Department of Control Science and Engineering Shanghai200092 China Anhui University of Technology School of Electrical and Information Engineering Ma'anshan243002 China

This paper systematically studies the problem of resilient controller design for networked control systems under imperfect communication environments. The denial of service (DoS) attacks in the case of an imperfect network are remodeled. The semi-Markov chain is introduced in this paper to provide a suitable description of random attacks. On this basis, the double-layer stochastic process is constructed, which consists of an attack sequence and an observation one. Second, since the attack modes are inaccessible, a controller is constructed based on the observation sequence by virtue of the emission probability to stabilize the system under random attacks. Due to the complexity of the network, the probability that an observer can accurately detect an attack when it occurs is considered unknown. Based on the introduced double-layer stochastic process, a mode-associated Lyapunov function is constructed to facilitate the stability analysis. Building on this foundation, sufficient conditions that can ensure the δ-error mean square stability of the closed-loop system are derived. In the end, a simulation of the unmanned ground vehicle is presented, showcasing the feasibility and validity of the proposed control scheme. © 2025 IEEE.

关键词： Stochastic systems

来源：评论

学校读者我要写书评

暂无评论

Simultaneous removal of Congo red and cadmium(Ⅱ) from aqueous solutions using graphene oxide–silica composite as a multifunctional adsorbent

引用

Journal of Environmental Sciences 2020年第12期32卷 151-160页

作者： Ebrahim Mahmoudi Sepehr Azizkhani Abdul Wahab Mohammad Law Yong Ng Abdelbaki Benamor Wei Lun Ang Muneer Ba-Abbad Department of Chemical and Process Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiSelangor Darul EhsanMalaysia Department of Chemical and Environmental Engineering Faculty of EngineeringUniversiti Putra Malaysia43400 SerdangSelangorMalaysia Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanJalan Sungai LongBandar Sungai LongCheras43000 KajangSelangorMalaysia Centre for Sustainable Process Technology(CESPRO) Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiSelangor Darul EhsanMalaysia Gas Processing Centre Qatar UniversityP.O.Box 2713DohaQatar

Graphene oxide is a very high capacity adsorbent due to its functional groups and π-π interactions with other compounds. Adsorption capacity of graphene oxide, however, can be further enhanced by having synergistic effects through the use of mixed-matrix composite. In this study, silica-decorated graphene oxide(SGO) was used as a high-efficiency adsorbent to remove Congo red(CR) and Cadmium(Ⅱ) from aqueous solutions. The effects of solution initial concentration(20 to 120 mg/l), solution pH(pH 2 to 7), adsorption duration(0 to 140 min) and temperature(298 to 323 K) were measured in order to optimize the adsorption conditions using the SGO adsorbent. Morphological analysis indicated that the silica nanoparticles could be dispersed uniformly on the graphene oxide surfaces. The maximum capacities of adsorbent for effective removal of Cd(Ⅱ) and CR were 43.45 and 333.33 mg/g based on Freundlich and Langmuir isotherms, respectively. Langmuir and Freundlich isotherms displayed the highest values of Q max for CR and Cd(Ⅱ) adsorption in this study, which indicated monolayer adsorption of CR and multilayer adsorption of Cd(II) onto the SGO, respectively. Thermodynamic study showed that the enthalpy( H) and Gibbs free energy( G) values of the adsorption process for both pollutants were negative, suggesting that the process was spontaneous and exothermic in nature. This study showed active sites of SGO( π-π, hydroxyl, carboxyl, ketone, silane-based functional groups) contributed to an enormous enhancement in simultaneous removal of CR and Cd(Ⅱ) from an aqueous solu-tion, Therefore, SGO can be considered as a promising adsorbent for future water pollution control and removal of hazardous materials from aqueous solutions.

关键词： Graphene-oxide Multifunctional adsorbent Competitive removal Heavy metal-dye removal

来源：评论

学校读者我要写书评

暂无评论

Generative manifold learning thermography for non-destructive evaluation of defects in composite materials 10

Generative manifold learning thermography for non-destructiv...

引用

10th IEEE Data Driven control and Learning Systems Conference, DDCLS 2021

作者： Liu, Kaixin Fan, Yu Zhang, Kuan Yang, Jianguo Yao, Yuan Liu, Yi Institute of Process Equipment and Control Engineering Zhejiang University of Technology Hangzhou310023 China Suzhou Big Vision Medical Imaging Technology Company Suzhou215000 China National Tsing Hua University Department of Chemical Engineering Hsinchu30013 Taiwan Institute of Innovation Research Zhejiang University of Technology Shengzhou Shengzhou312400 China

ISBN: (纸本)9781665424233

In the non-destructive evaluation of infrared thermography, the thermographic data modeling and analysis steps play an important role in improving the inspection results. However, thermal image analysis still faces challenges such as a small number of informative images and difficulty in extracting defect features. In this work, a novel generative manifold learning thermography (GMLT) method for defect detection of composite materials is proposed. In detail, the spectral normalization generative adversarial network is used as a data augmentation strategy to generate more informative thermal images. Sequentially, the MLT-based thermographic data analysis method is adopted to extract and visualize defects in the thermal images. Experiments on carbon fiber reinforced polymers verify the effectiveness and advantages of the proposed method. Key Words: non-destructive evaluation, generative adversarial network, manifold learning, thermographic data analysis, carbon fiber reinforced polymer © 2021 IEEE.

关键词： Defects

来源：评论

学校读者我要写书评

暂无评论

Modeling of Non-Catalytic Gas-Solid Reactions with Coupled Cfd-Dem- Uscm Method: A Case Study on Adsorption of Ammonia

SSRN

引用

SSRN 2025年

作者： Zarghami, Ameneh Moghaddas, Jafarsadegh Kazemi, Saman Mostoufi, Navid Saleh, Khashayar Chemical Engineering Department Sahand University of Technology P.O. Box 51335/1996 Tabriz Iran Process Design and Simulation Research Centre School of Chemical Engineering College of Engineering University of Tehran P.O. Box 11155/4563 Tehran Iran Sorbonne Universités Université de Technologie de Compiègne Transformations Intégrées de la Matière Renouvelable EA 4297 France

This study presents a novel approach for modeling the non-catalytic gas-solid reaction of adsorption of ammonia by metal ammine complexes. A coupled computational fluid dynamics-discrete element method-unreacted shrinking core model (CFD-DEM-USCM) is developed to simulate the behavior of an ammonia storage reactor. The model integrates both mesoscale gas dynamics and micro-scale particle interactions, allowing for a comprehensive analysis of the adsorption process. Validation of the model against experimental data demonstrated its accuracy in predicting the conversion. It was shown that the effective gas diffusivity of gas inside the particles greatly affects the overall conversion as well as the mean temperature of particles and gas. Higher diffusion rates enhance mass transfer, resulting in higher temperatures for both particles and gas. The change in particle size during the absorption of ammonia was investigated and its influence on the reactor void fraction was studied. Inspecting the change in the imposed pressure of the gas at the diffuser and reactor wall temperature indicated that increasing the pressure or decreasing the wall temperature enhances the conversion in the reactor. Estimation of force distribution among particles and between particles and the reactor wall indicated that increasing the particle size with conversion increases both forces. This study provides insight into efficient ammonia storage solutions, contributing to advancements in selective catalytic reduction technology for vehicle emissions control. © 2025, The Authors. All rights reserved.

关键词： Void fraction

来源：评论

学校读者我要写书评

暂无评论

Metasurface-Enhanced Mid-Infrared Sensing Based on Integrated Polycrystalline Silicon Metagratings

Metasurface-Enhanced Mid-Infrared Sensing Based on Integrate...

引用

IEEE Canada International Humanitarian technology Conference (IHTC)

作者： Jesus H. Mendoza-Castro Artem S. Vorobev Giovanni Piscopo Simone Iadanza Tomasz Piwonski Antonella D’Orazio Marco Grande Giovanni Magno Bernhard Lendl Liam O’Faolain Department of Electrical and Information Engineering Polytechnic University of Bari Bari Italy Institute of Chemical Technologies and Analytics TU Wien Vienna Austria Centre for Advanced Photonics & Process Analysis Munster Technological University Cork Ireland Tyndall National Insitute Cork Ireland Laboratory of Nano and Quantum Technologies Paul Scherrer Institut Villigen Switzerland Laboratory of Integrated Nanoscale Photonics and Optoelectronics EPFL Lausanne Switzerland

ISBN: (数字)9798350354645

ISBN: (纸本)9798350354652

This paper explores the design and optimization of all-dielectric metasurfaces, consisting of silicon meta-atoms on calcium fluoride (CaF 2 ) and silicon nitride (Si 3 N 4 ) substrates, to enhance infrared absorption. This optimization results in intense light-matter interactions in the spectral bands of molecular vibrations, thereby improving detection accuracy for gases and liquids across various settings, including biological, environmental, and industrial scenarios. The proposed devices are engineered for broadband operation and designed for sensing applications in the mid-infrared spectrum, within the 4 to 8 µm wavelength range. The analysis presented in this work highlights the potential of metamaterial-inspired sensors based on gratings to support real-time monitoring and safety applications, contributing directly to better air quality assessment, improved health diagnostics, and enhanced safety protocols.

关键词： Vibrations Liquids Absorption Metasurfaces Silicon Safety Broadband communication Gratings Optimization Substrates

来源：评论

学校读者我要写书评

暂无评论

New Insights and Reaction Mechanisms in the Design of Catalysts for the Synergistic Removal of Nox and Vocs from Coke Oven Flue Gas: Dual Regulation of Oxidative Properties and Acidic Sites

SSRN

引用

SSRN 2024年

作者： Chen, Zimo Zhao, Cheng Wei, Ninghan Yun, Junge Chu, Rencheng Zheng, Han Feng, Xin Tong, Zhangfa Chen, Zhihang Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical Engineering Guangxi University Nanning530004 China Guangdong Key Lab of Water & Air Pollution Control Guangdong Province Engineering Laboratory for Air Pollution Control South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510655 China College of Environment and Resources Xiangtan University Xiangtan China Department of Chemistry School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi'An China

The acid and redox sites of the MnCo catalysts were simultaneously fine-tuned by the addition of V. A dual-function catalyst, designated as V0.5Mn5Co5, has been constructed for the synergistic removal of NOx and volatile organic compounds under coke-oven flue gas conditions, which has more than 95% NOx conversion and more than 80% N2 selectivity at 180-300 °C and it removes 70% of ethylene at 240 °C. Besides it has excellent sulfur and water resistance. The characterization results demonstrated that this acid-redox site modulation strategy appropriately weakened the oxidation capacity of the catalysts while increasing the surface acidity of the catalysts. The catalysts mainly perform SCR reaction through E-R mechanism, and N2O is generated through the transition dehydrogenation of NH3 and NSCR reaction. Ethylene(C2H4) adsorption by the catalyst, oxidative formation of carbonate species with metal elements on the surface, and finally decomposition to CO2. There was a competitive adsorption of NH3 with C2H4, and there was a mutual inhibition between the SCR reaction and the ethylene oxidation reaction. V0.5Mn5Co5 exhibits excellent synergistic removal of NOx and VOCs in coke oven flue gas compare with commercial VWTi catalysts, which indicating great promise for industrial application. © 2024, The Authors. All rights reserved.

关键词： Volatile organic compounds

来源：评论

学校读者我要写书评

暂无评论

Constrained Optimization with Decision-Dependent Distributions

引用

IEEE Transactions on Automatic control 2025年

作者： Wang, Zifan Liu, Changxin Parisini, Thomas Zavlanos, Michael M. Johansson, Karl H. KTH Royal Institute of Technology Division of Decision and Control Systems School of Electrical Engineering and Computer Science Sweden Digital Futures StockholmSE-10044 Sweden East China University of Science and Technology Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education Shanghai200237 China Imperial College London Department of Electrical and Electronic Engineering LondonSW7 2AZ United Kingdom Aalborg University Department of Electronic Systems Denmark University of Trieste Department of Engineering and Architecture Italy Duke University Department of Mechanical Engineering and Materials Science DurhamNC United States

In this paper we deal with stochastic optimization problems where the data distributions change in response to the decision variables. Traditionally, the study of optimization problems with decision-dependent distributions has assumed either the absence of constraints or fixed constraints. This work considers a more general setting where the constraints can also dynamically adjust in response to changes in the decision variables. Specifically, we consider linear constraints and analyze the effect of decision-dependent distributions in both the objective function and constraints. Firstly, we establish a sufficient condition for the existence of a constrained equilibrium point, at which the distributions remain invariant under retraining. Moreover, we propose and analyze two algorithms: repeated constrained optimization and repeated dual ascent. For each algorithm, we provide sufficient conditions for convergence to the constrained equilibrium point. Furthermore, we explore the relationship between the equilibrium point and the optimal point for the constrained decision-dependent optimization problem. Notably, our results encompass previous findings as special cases when the constraints remain fixed. To show the effectiveness of our theoretical analysis, we provide numerical experiments on both a market problem and a dynamic pricing problem for parking based on real-world data. © 1963-2012 IEEE.

关键词： Optimization algorithms

来源：评论

学校读者我要写书评

暂无评论

Data-Driven Distributionally Robust Mixed-Integer control through Lifted control Policy

引用

IEEE Transactions on Automatic control 2025年

作者： Ma, Xutao Ning, Chao Du, Wenli Shi, Yang Shanghai Jiao Tong University Department of Automation Shanghai200240 China Ministry of Education of China Key Laboratory of System Control and Information Processing Shanghai200240 China East China University of Science and Technology Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education Shanghai200237 China University of Victoria Department of Mechanical Engineering VictoriaBCV8W 3P6 Canada

This paper investigates the finite-horizon distributionally robust mixed-integer control (DRMIC) of uncertain linear systems. However, deriving an optimal causal feedback control policy to this DRMIC problem is computationally formidable for most ambiguity sets. To address the computational challenge, we propose a novel distributionally robust lifted control policy (DR-LCP) method to derive a high-quality approximate solution to this DRMIC problem for a rich class of Wasserstein metric-based ambiguity sets, including the Wasserstein ambiguity set and its variants. In theory, we analyze the asymptotic performance and establish a tight non-asymptotic bound of the proposed method. In numerical experiments, the proposed DR-LCP method empirically demonstrates superior performance compared with existing methods in the literature. ©1963-2012 IEEE.

关键词： Mixed-integer linear programming

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：