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High-purity, low-Cl V2O5 via the gaseous hydrolysis of VOCl3 in a fluidized bed

Particuology 2020年第2期18卷 9-15页

作者： Chuanlin Fan Jie Xu Haitao Yang Qingshan Zhu State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Multiphase Complex Systems.Institute of Process Engineering Chinese Academy of SciencesBeijing 100190China

Present-day all-vanadium redox flow batteries(VRFBs)generally require high purity vanadium oxide as a raw *** chlorination procedure presents distinct technical advantages with regard to preparing high purity vanadium pentoxide(V2O5)using vanadium oxytrichloride(VOCl3)as a highly pure *** efficiently prepare high purity V2Os from VOCl3,a single-step fluidized bed chemical vapor deposition(FBCVD)method was explored in the present *** on thermodynamic analyses,the direct and complete conversion of VOCl3 to V2O5 is difficult,and may result in a small amount of residual Cl in the ***,the effects of temperature and the H2O/VOCl3 molar ratio on the quantity of residual Cl were *** Cl concentration was found to decrease with increasing temperature or increasing H2O/VOCl3 molar ***,Cl was determined to be present only in the form of Cl-V bonds,while Cl-H and Cl-Cl bonds were not detected in a V2O5 product made at 200℃with a H2O/VOCl3 molar ratio of 18.A Cl concentration of less than 0.05 wt%was obtained under the optimal synthesis conditions,demonstrating that the FBCVD method is a viable means of preparing high purity V2O5 via the gaseous hydrolysis of VOCl3.

关键词： Chlorination procedure High purity VOCl3 FBCVD High purity V2O5 Gaseous hydrolysis Chlorine

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Fabrication of a low insertion loss and high productivity FI/FO device based on the different core couple method and tapered corrosion method

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Optics Letters 2025年第11期50卷 3497-3500页

作者： Li, Yuxin Wang, Qianjin Wu, Yupeng Yin, Zhiyuan Zhou, Xue Yan, Xin Cheng, Tonglei State Key Laboratory of Synthetical Automation for Process Industries College of Information Science and Engineering National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang110819 China Foshan Graduate School of Innovation Northeastern University Guangdong Foshan528311 China Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology Qinhuangdao066004 China

Two innovative methods, the different core couple (DC) method and the tapered corrosion (T-C) method, are proposed to improve traditional fiber bundle corrosion techniques for fabricating fan-in/fan-out (FI/FO) devices. The D-C method utilizes fibers with varying core diameters to facilitate light transmission from smaller to larger diameters, enhancing the fault tolerance of a fiber core structure on the end-face of FI/FO devices and minimizing optical signal leakage at the multiplexer joint, thereby reducing insertion loss (IL). Taper-cut and fusion-splicing techniques ensure the compatibility of the device with standard optical communication systems. The T-C method presents the idea of tapered corrosion fibers applied to FI/FO device fabrication, significantly enhancing production efficiency through a simple, repeatable, and cost-effective process. The above two methods were used to fabricate the corresponding FI/FO device for four-core single-mode fibers (4C-MCF), which are employed for signal multiplexing and demultiplexing. The device has a low average IL value of less than 0.5 dB, with cross talk lower than −60 dB, meeting the requirements for fiber-optic communication. This work provides two techniques for the fabrication of FI/FO device in multi-core fiber (MCF) communication systems, which can be expected to promote the innovation and development of space division multiplexing (SDM) technology. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Fiber to the x

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Small Object Detection Algorithm Based on RPANet and Positional Convolution Attention Mechanism 5

Small Object Detection Algorithm Based on RPANet and Positio...

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5th International Conference on Artificial Intelligence and Pattern Recognition, AIPR 2022

作者： Tang, Zongbing Yang, Dan Qu, Junsuo School of Communication and Information Engineering Xi'an University of Posts and Telecommunications China School of Automation Xi'an Key Laboratory of Advanced Control and Intelligent Process Xi'an Robertic Intelligent Systems International Science and Technology Cooperation Base Xi'an University of Posts and Telecommunications Shaanxi Xi'an China

ISBN: (纸本)9781450396899

With the development of deep learning, small object detection has a significant role in application fields such as smart factories and remote sensing images. In order to address the problem of difficult and low accuracy detection of small objects due to small pixel scale and little feature information. In this paper, we present a path aggregation network with residual characteristic RPANet on YOLOv3 algorithm, which can twice use the feature information of the backbone network to enhance the small object feature information, and also offer a positional convolution attention mechanism module PCAM to thoroughly learn and extract the small object feature information as well as reduce the unnecessary feature information in the background, so as to further enhance the detection capability of the model for small objects. The experimental results demonstrate that the improved YOLOv3 algorithm is more effective for small object detection. © 2022 ACM.

关键词： Convolution

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Decentralized Zeno-Free Event-Triggered control For Multiple Networks Subject to Stochastic Network Delays and Poisson Pulsing Attacks

arXiv

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arXiv 2024年

作者： Zhang, Dandan Jin, Xin Su, Hongye The State Key Laboratory of Industrial Control Technology The Institute of Cyber-Systems and Control The College of Control Science and Engineering Zhejiang University Hangzhou310027 China The Research Institute of Intelligent Complex Systems Fudan University Shanghai200433 China The Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education East China University of Science and Technology Shanghai200237 China

By designing the decentralized time-regularized (Zeno-free) event-triggered strategies for the state-feedback control law, this paper considers the stochastic stabilization of a class of networked control systems, where two sources of randomness exist in multiple decentralized networks that operate asynchronously and independently: the communication channels are constrained by the stochastic network delays and also by Poisson pulsing denial-of-service (Pp-DoS) attacks. The time delay in the network denotes the length from a transmission instant to the corresponding update instant, and is supposed to be a continuous random variable subject to certain continuous probability distribution;while the attacks' cardinal number is a discrete random variable supposed to be subject to Poisson distribution, so the inter-attack time, i.e., the time between two consecutive attack instants, is subject to exponential distribution. The considered system is modeled as a stochastic hybrid formalism, where the randomness enters through the jump map into the reset value (the inter-attack time directly related) of each triggered strategy. By only sampling/transmitting state measurements when needed and simultaneously by taking the specific medium access protocols into account, the designed event-triggered strategies are synthesized in a state-based and decentralized form, which are robust (tolerable well) to stochastic network delays, under different tradeoff-conditions between the minimum inter-event times, maximum allowable delays (i.e., potentially tolerable delays) and the frequencies of attacks. Using stochastic hybrid tools to combine attack-active parts with attack-over parts, the designed triggered strategies, if designed well according to the actual system needs, can tolerate (be resilient to) the Pp-DoS attacks and stochastic network delays without jeopardizing the stability and Zeno-freeness, which is verified by the robust global attitude stabilization of flexible combined ro

关键词： Networked control systems

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Integrating quantum and classical computing for multi-energy system optimization using Benders decomposition

arXiv

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arXiv 2023年

作者： Leenders, Ludger Sollich, Martin Reinert, Christiane Bardow, André Energy & Process Systems Engineering Department of Mechanical and Process Engineering ETH Zürich Tannenstrasse 3 Zürich8092 Switzerland Institute of Technical Thermodynamics RWTH Aachen University Schinkelstraße 8 Aachen52062 Germany

During recent years, quantum computers have received increasing attention, primarily due to their ability to significantly increase computational performance for specific problems. Computational performance could be improved for mathematical optimization by quantum annealers. This special type of quantum computer can solve quadratic unconstrained binary optimization problems. However, multi-energy systems optimization commonly involves integer and continuous decision variables. Due to their mixed-integer problem structure, quantum annealers cannot be directly used for multi-energy system optimization. To solve multi-energy system optimization problems, we present a hybrid Benders decomposition approach combining optimization on quantum and classical computers. In our approach, the quantum computer solves the master problem, which involves only the integer variables from the original energy system optimization problem. The subproblem includes the continuous variables and is solved by a classical computer. For better performance, we apply improvement techniques to the Benders decomposition. We test the approach on a case study to design a cost-optimal multi-energy system. While we provide a proof of concept that our Benders decomposition approach is applicable for the design of multi-energy systems, the computational time is still higher than for approaches using classical computers only. We therefore estimate the potential improvement of our approach to be expected for larger and fault-tolerant quantum computers. © 2023, CC BY.

关键词： Quantum computers

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Influence of high-speed impact cutting on the electromagnetic properties of non-oriented electrical steel sheets

Influence of high-speed impact cutting on the electromagneti...

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International Electric Drives Production Conference (EDPC)

作者： Jonas Matt Martin Doppelbauer Process Development Drive Systems Mercedes-Benz AG Stuttgart Germany Institute of Electrical Engineering Karlsruhe Institute of Technology Karlsruhe Germany

The constantly growing requirements for increasing the range of battery electric vehicles and an associated increase in the efficiency of electrical machines for traction drives also pose challenges for manufacturing processes and the selection of suitable processing parameters in the manufacturing chain. High-speed impact cutting (HSIC) has been investigated to a limited extent for electrical steel sheets and represents an essential opportunity to improve the soft magnetic behavior in the cut edge zone. This paper aims to investigate and validate the primary characteristics that result from HSIC on the softmagnetic properties. Accordingly, it is shown and quantified how the degradation of the soft magnetic behavior is formed in the zone affected by shear cutting, with a comparative representation to conventional shear cutting. It is also shown how the secondary properties change as a result of the improved cutting surface quality.

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A Planar Pattern Reconfigurable Yagi-Uda Antenna Using Electrically Biased Vanadium Dioxide (VO2)

A Planar Pattern Reconfigurable Yagi-Uda Antenna Using Elect...

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European Conference on Antennas and Propagation, EuCAP

作者： Grant J. Gourley Eric Kumi-Barimah Gin Jose Dimitris E. Anagnostou Institute of Sensors Signals and Systems Heriot-Watt University Edinburgh UK School of Chemical and Process Engineering The University of Leeds Leeds UK

A proof-of-concept vanadium dioxide (VO 2 ) enabled planar pattern reconfigurable Yagi-Uda antenna operating at 5.8 GHz has been designed based on measured VO 2 conductivity values of a 750 nm thick film.

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Distributional Constrained Reinforcement Learning for Supply Chain Optimization

arXiv

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arXiv 2023年

作者： Bermúdez, Jaime Sabal del Rio Chanona, Antonio Tsay, Calvin Department of Computing Imperial College London United Kingdom Sargent Centre for Process Systems Engineering Imperial College London United Kingdom

This work studies reinforcement learning (RL) in the context of multi-period supply chains subject to constraints, e.g., on production and inventory. We introduce Distributional Constrained Policy Optimization (DCPO), a novel approach for reliable constraint satisfaction in RL. Our approach is based on Constrained Policy Optimization (CPO), which is subject to approximation errors that in practice lead it to converge to infeasible policies. We address this issue by incorporating aspects of distributional RL into DCPO. Specifically, we represent the return and cost value functions using neural networks that output discrete distributions, and we reshape costs based on the associated confidence. Using a supply chain case study, we show that DCPO improves the rate at which the RL policy converges and ensures reliable constraint satisfaction by the end of training. The proposed method also improves predictability, greatly reducing the variance of returns between runs, respectively;this result is significant in the context of policy gradient methods, which intrinsically introduce significant variance during training. Copyright © 2023, The Authors. All rights reserved.

关键词： Reinforcement learning

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Extraction of artemisinin with hydroxypropyl-β-cyclodextrin aqueous solution for fabrication of drinkable extract

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Green Chemical engineering 2021年第2期2卷 197-206页

作者： Yongqiang Zhang Yingying Cao Xiangzhan Meng Phonphat Prawang Hui Wang Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesNo.1 BeierjieZhongguancunHaidian DistrictBeijing100190China Sino-Danish College University of Chinese Academy of SciencesYanqihu CampusNo.380 HuaibeizhuangHuairou DistrictBeijing101408China

A process for extraction of artemisinin(Ars)from Artemisia annua *** on aqueous solution of cyclodextrin derivative under ultrasonic irradiation was *** the test additives,the system containing edible hydroxypropyl-β-cyclodextrin(HPBCD)was shown to be efficient for this *** optimal extraction conditions were predicted by artificial neural network,under which the extraction amount of Ars could reach 8.66 mg per gram of the leaves,much higher than the value in water(1.70 mg g-1).Kinetics study indicated that HPBCD enhanced the equilibrium amount of Ars in water,and ultrasonic irradiation accelerated extraction rate and reduced the activation *** study showed that the formation of Ars-HPBCD complex during extraction enhanced the water solubility of Ars and facilitated the extraction,and the configuration of Ars-HPBCD complex was modeled by molecular docking,which was further verified by *** work provides a convenient way to fabricate the traditional tea-based medicament of natural drugs to make production of this famous antimalarial medicine cheaper.

关键词： Artemisinin Cyclodextrin derivative Aqueous solution Ultrasonic assisted extraction Complex

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Towards Resilient and Sustainable Water and Energy Sectors in Jordan 8th

Towards Resilient and Sustainable Water and Energy Sectors i...

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8th International Conference on Material engineering and Nanotechnology, ICMEN 2024

作者： Sawalha, Ansam Baqain, Sameeh Khasawneh, Mohammad Ali Sawalha, Amani Khasawneh, Ahmad Ali Department of Civil Engineering American University of Madaba Madaba Jordan Department of Mechanical Engineering American University of Madaba Madaba Jordan Department of Civil Engineering Prince Mohammad Bin Fahd University Al Khobar Saudi Arabia Department of Architecture Engineering Applied Science Private University Amman Jordan Management Engineering and Process Improvement Department/Integrated Systems Engineering Department Ohio State University Wexner Medical Center and Ohio State University 660 Ackerman Road ColumbusOH43202 United States

ISBN: (纸本)9789819636235

The concepts of resilience and sustainability have recently gained significant attention from industrial and academic institutions. The resilience concept in the water and energy sectors indicates the ability to recover from disruptions such as natural disasters, whereas the sustainable concept ensures that current needs are met without compromising future generations. In Jordan, the water and energy sectors face numerous challenges, including scarce natural resources combined with the growth in climate-related disasters, regional instability, conflicts, urbanization, continuing difficulties in water and energy resources, and consumer awareness of sources’ conservation and sustainability. To address these pressing issues, the authors conducted in-depth interviews with 33 experts from government, international organizations, private companies, and donor agencies. These discussions explored the current state of the water and energy sectors, highlighting key challenges, the critical need to integrate resilience and sustainability, and potential future directions. The study’s findings emphasize the importance of coordinated strategic planning, along with specific recommendations such as upgrading water pumps, installing smart meters, and implementing time-based tariffs to promote responsible consumption. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Energy Energy Sector Resilience Sustainable Water Water Sector

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