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Metagenomics reveals the microbial community and functional metabolism variation in the partial nitritation-anammox process:From collapse to recovery

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Journal of Environmental Sciences 2024年第1期135卷 210-221页

作者： Hong Wang Hui Gong Xiaohu Dai Min Yang State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China BIOMATH Department of Data Analysis and Mathematical ModellingGhent UniversityGhent 9000Belgium

Mainstream partial nitritation-anammox(PNA)process easily suffers from performance instability and even reactor collapse in ***,it is of great significance to unveil the characteristic of performance recovery,understand the intrinsic mechanism and then propose operational *** this study,we combined long-term reactor operation,batch tests,and metagenomics to reveal the succession of microbial community and functional metabolism variation from system collapse to *** aeration control(0.10-0.25mg O_(2)/L)was critical for performance *** was also found that Candidatus Brocadia became the dominant flora and its abundance increased from 3.5%to 11.0%.Significant enhancements in carbon metabolism and phospholipid biosynthesis were observed during system recovery,and the genes abundance related to signal transduction was dramatically *** up-regulation of sdh and suc genes showed the processes of succinate dehydrogenation and succinyl-CoA synthesis might stimulate the production of amino acids and the synthesis of proteins,thereby possibly improving the activity and abundance of AnAOB,which was conducive to the performance ***,the increase in abundance of hzs and hdh genes suggested the enhancement of the anammox *** in the abundance of key genes involved in nitrogen metabolism indicated that nitrogen removal pathway was more diverse after system *** achievement of performance recovery was driven by anammox,nitrification and denitrification coupled with dissimilatory nitrate reduction to *** results provide deeper insights into the recovery mechanism of PNA system and also provide a potential regulation strategy for the stable operation of the mainstream PNA process.

关键词： Partial nitritation-anammox Metagenomics Microbial community Functional metabolism Recovery

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Sharing and Collaborating When Teaching Automatic control: An Experience-Based Needs Analysis 32

Sharing and Collaborating When Teaching Automatic Control: A...

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32nd Mediterranean Conference on control and automation, MED 2024

作者： Knorn, Steffi Garone, Anja Varagnolo, Damiano Garone, Emanuele Technische Universität Department of Control Berlin Germany Brussels Institute for Advanced Studies Belgium Norwegian University of Science and Technology Department of Engineering Cybernetics Norway University of Padova Department of Information Engineering Italy Free University of Brussels Department of Automation and Systems Analysis Belgium

ISBN: (纸本)9798350395440

We discuss two specific issues that affected the workflows in our career as automatic control teachers and that are related to how teachers may establish teaching-oriented collaborations with colleagues from the same or different institutions. The first issue we identify is the systematic difficulty that one encounters when wanting to exchange instructional material with colleagues, while the second is the complexity of establishing students exchange programs across different institutions and nations. We discuss the nature and structure of the two problems, discuss why and how they are connected, and draw practical examples of how these problems may affect workflows. We then present a strategy that aims at solving these issues based on the introduction of an opportune indexing of instructional material in terms of contents and complexity of such contents, and how this information may be graphically displayed so to ease human and machine interpretability. We further discuss how this approach was used on a smaller scale to ease collaborations among close colleagues, and how it may be extended and adopted on a larger scale. © 2024 IEEE.

关键词： process control

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Design and optimisation of double wishbone suspension for high performance vehicles

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International Journal of Vehicle Systems Modelling and Testing 2023年第2期17卷 185-195页

作者： Sharma, Rishu Department of Mechanical and Automation Engineering G B Pant DSEU Okhla Campus 1 Delhi110020 India

technology is an unpredictable friend, nudging us forward with one hand while demanding exorbitant tolls with the other. With the control on the parameters like camber angle, scrub radius, roll centre height etc., the careful design of double wishbone allows the motion control of wheel throughout the suspension process. The paper considers the high-performance vehicles and impinges the issues related to optimisation of double wishbone suspension system. The analysis will help the researchers and practioners to frame the strategies to develop a system with reduced vibrations and noise. Copyright © 2023 Inderscience Enterprises Ltd.

关键词： Cambers

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Retrofitting of Conventional Lathe Machine to Computer Numerically controlled (CNC) Machine With Bluetooth and Mobile Application Capabilities 9

Retrofitting of Conventional Lathe Machine to Computer Numer...

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9th IEEE International Conference on Adaptive Science and technology, ICAST 2024

作者： Sowah, Robert A. Asare-Dartey, Jacqueline D. Acakpovi, Amevi Osei, Gifty University of Ghana Department of Computer Engineering Accra Ghana Accra Technical University Department of Electrical and Electronics Engineering Accra Ghana

ISBN: (纸本)9798350385403

Computer Numerically controlled (CNC) machines play an integral and irreplaceable role in manufacturing industries. It not only realizes rapid industrial production but also saves manpower and material resources. Conventional machining tools, such as the manually operated lathe machine, are inefficient. They are quite challenging for commercial purposes due to low production capability, hence the need for CNC machines to enhance industrial automation productivity. Currently, many conventional lathe machines are used in industries in the country. The need to migrate the manual operations of these machines to full or semi-automation status is of utmost importance. It is required to convert these machines to semi-automatic lathes by retrofitting to grow the country's development in the machining industry. Converting the manual lathe into a semi-automatic lathe requires three significant modifications: electronics, mechanics, and hydraulic components. In this paper, we propose a computer numerically controlled automation system for converting the conventional lathe machine, by developing mobile and web applications to perform automation tasks. The conversion process was carried out on a mini center lathe machine at the Ghana Atomic Energy Commission at Kwabenya in Accra. Firstly, unnecessary components such as the gearbox and handwheels were removed and mounts for the various motors for the automation tasks were added to the machine as part of the mechanical system component modification. The electronic component modification involved installing stepper motors for the lathe machine's X, Y, and Z axes. The Arduino microcontroller controlled the motors via the motor drive systems. At the end of the conversion, the newly retrofitted machine could machine a designed part successfully when the machining instruction in G-code format was sent to the microcontroller. Instructions were decoded and executed successfully. © 2024 IEEE.

关键词： Lathes

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Recent technological advances in the production of green hydrogen: a review

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International Journal of Energy technology and Policy 2024年第3-4期19卷 261-285页

作者： Rincon, Alvaro Ferney Algarra Ouana, Samuel Alberto de Souza, Tania Cristina Vieira, Daniel Azevedo de Oliveira Notório Ribeiro, Jéssica Environmental Engineering Department Federal University of Lavras MG Lavras37203-202 Brazil

Hydrogen is recognised as the fuel of the future and a key component for sustainable energy transition in all spaces that currently use fossil fuels, such as the electricity, transport, and industrial sector. The most widely used hydrogen production process is water electrolysis and often requires large amounts of energy. However, to obtain clean hydrogen, it is essential that it comes from renewable and sustainable sources. Therefore, this article reviews the most recent advances in green hydrogen production technologies published during the 2019-2023 period. A global overview of green hydrogen production is compiled in this article, and studies on the mechanisms of electrolysis, photocatalysis and thermochemical cycles for water decomposition are also presented, as are new strategies for integrating technologies and efforts designed to make production more sustainable and competitive with conventional methods. Thermochemical cycle technology, it was identified as one of the most promising to produce green hydrogen. © 2024 Inderscience Enterprises Ltd.

关键词： Clean energy

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The Effect of Virtual Reality technology in Teaching Mathematics on Students’ Ability to process Data and Graphic Representation

International Journal of Interactive Mobile Technologies

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International Journal of Interactive Mobile Technologies 2024年第8期18卷 27-39页

作者： Alzoubi, Khaled Ahmed Aqeel Department of Basic Science Support Faculty of Science the Hashemite University Box 330127 Zarqa13133 Jordan

The study focused on the impact of using augmented reality (AR) in teaching mathematics to tenth-grade students in the 2022–2023 academic year. The sample consisted of 70 students from schools in the city of Amman, who were divided into 35 students in the experimental group and 35 students in the control group. The researcher utilized the quasi-experimental method and collected data through questionnaires and testing tools. Data were statistically analyzed using the MANOVA test, outcome analysis techniques, and GLM test. The results indicate the quality of virtual reality (VR). Students’ ability to process data improved by 94% in the experimental group and 88% in the control group. The experimental group demonstrated an effective contribution of 97% in improving graphic representation ability, while the control group showed a contribution of 92%. The study relied on the descriptive-analytical method. The study concluded that AR technology and its usage have become largely dependent on preparing technical and material requirements. It also highlighted that this technology aids students in learning scientific facts, concepts, and instructions in an easy and effective manner. The results indicate the necessity of expanding scientific research and studies on the advantages and disadvantages of AR technology and its optimal utilization. © 2024 by the authors of this article. Published under CC-BY.

关键词： Students

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A Conceptual Framework Towards the Realization of In situ Monitoring and control of End-to-End Additive Manufacturing process

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Micro and Nanosystems 2023年第2期15卷 92-101页

作者： Karadgi, Sachin Bhovi, Prabhakar M. Patil, Arun Y. Ramaiah, Keshavamurthy Venka-Teswarlu, K. Langdon, Terence G. Department of Automation & Robotics KLE Technological University Karnataka Hubballi580031 India School of Mechanical Engineering KLE Technological University Karnataka Hubballi580031 India B.V.B. College of Engineering and Technology Mechanical Engineering KLE Technological University Karnataka Hubballi580031 India Department of Mechanical Engineering Dayananda Sagar College of Engineering and Technology Karnataka Bengaluru560078 India Benga-luru Karnataka India Materials Research Group School of Engineering Sciences University of Southampton SouthamptonSO17 1BJ United Kingdom

Additive Manufacturing (AM) is considered one of the key technologies for realizing Industry 4.0. There are numerous stages in the end-to-end AM process, including component design, material design, build, and so on. An enormous amount of data is generated along the end-to-end AM process that can be acquired from the 3D printer in real-time, micro-characterization studies, and process plan details, among others. For instance, these data can be employed to predict the printed compo-nents’ quality and, at the same time, proactively adapt the 3D printer parameters to achieve better qual-ity. This end-to-end AM process can be mapped onto the digital thread. The current article elaborates on a conceptual framework to acquire the data from various sources associated with the end-to-end AM process and realize monitoring and control of the end-to-end AM process, leading to an intelligent AM process. © 2023, Bentham Science Publishers. All rights reserved.

关键词： 3D printing

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Development of Human-machine Interactive Interface for Hosiery Waterproof Coating production Line 4

Development of Human-machine Interactive Interface for Hosie...

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4th IEEE Eurasia Conference on IoT, Communication and Engineering, ECICE 2022

作者： Hsiao, Chun-Ching Chen, Han-Yi National Formosa University Department of Mechanical Design Engineering Yunlin632 Taiwan

ISBN: (纸本)9781665482080

Smart technology for textiles has been developed so that functional socks can achieve waterproof and warm effects by a permeation process. Using PLC (Programmable Logic controller) and human-machine integrated control equipment for the hosiery waterproof coating production equipment, the remote monitoring technology assists operators to catch the equipment status, tracks the manufacturing progress, improves manufacturing efficiency, and further extends the lifetime of automation equipment. The human machine interaction interface is used to present output, production capacity, progress, temperature distribution, wind speed, liquid level, transmission speed, operation cycle, and production utilization rate. Producers do not need to spend additional time and manpower to record and measure data. The interface for graphical programming and visual operation to reduce personnel education costs and achieve the purpose of improving production efficiency. © 2022 IEEE.

关键词： controllers

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Stochastic Scheduling for Batch processes With Downstream Queue Time Constraints

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IEEE Transactions on Semiconductor Manufacturing 2023年第4期36卷 599-610页

作者： Chien, Wen-Chi Chou, Ywh-Leh Wu, Cheng-Hung Taiwan Semiconductor Manufacturing Company Ltd. Fab Operations Hsinchu30078 Taiwan Feng Chia University Department of Industrial Engineering and Systems Management Taichung City407102 Taiwan National Taiwan University Institute of Industrial Engineering The Department of Business Administration The Department of Mechanical Engineering Taipei City106 Taiwan

This research studies the problems of stochastic dynamic scheduling in production systems with batch processes and process queue time (PQT) constraints. The production systems consist of upstream batch processing machines and downstream single processing machines. Under the PQT constraint, waiting time in the downstream queue is constrained by an upper limit and violating this constraint causes scraps of jobs. The batch process increases the probability of PQT constraint violation because a batch of work-in-processes (WIPs) will move simultaneously into the downstream queue after the service completion of batch processes and suffer from higher waiting time variance. A batch process admission control (BPAC) model is developed using Markov decision processes to minimize the sum of long-run average waiting and scrap costs. The proposed BPAC model explicitly considers uncertain factors in production systems given that uncertainties are major reasons for PQT constraint violation. These uncertain factors include job arrival, processing time, and machine breakdown/repair. To cope with these uncertain factors, the BPAC control decisions change dynamically with the real-time machine health and WIP distribution. The performance of BPAC is validated using discrete event simulation, and the simulation results confirm the significant performance improvement in a wide range of batch production environments. © 1988-2012 IEEE.

关键词： Stochastic systems

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Digital twinning of vertical centrifugal casting

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Concurrent Engineering Research and Applications 2024年第1-4期32卷 78-89页

作者： Anadkat, Dhaval Dave, Anjali Sata, Amit Shukla, Minal Jarboui, Slaheddine Department of Mechanical Engineering Marwadi University Rajkot India Department of Mechanical Engineering Lukhdhirji Engineering College Morbi India MGL Group Rajkot India Deparment of Computer Engineering College of Computer Science King Khalid University KSA Abha Saudi Arabia

This paper explores the transformative potential of digital twin technology in vertical centrifugal casting (VCC), a cornerstone manufacturing process for high-integrity cylindrical components. By integrating real-time data, physical models, and machine learning algorithms, digital twins unlock a new paradigm of process optimization, predictive maintenance, and quality control. Integration of digital twinning enhances the performance in different domains of work like enhancing the quality of research, production etc. Howbeit, digital twinning is nascent in the domain of manufacturing specially in the casting sub domain. A physical set up of VCC is integrated with Internet of Things (IoT) and data acquisition system to stream the collected data to the cloud-based server. Transformation of Internet of Things (IoT) enabled VCC integrated with different sensors into the digital twin helps in quality prognosis for future applications. The data is further fetched from the cloud and interconnection is established between the digital twin. Real time monitoring, controlling and operating can be done easily with the help of a digital twin to predict the quality and tentative defect locations. Further amplifying these benefits, emerging technologies like Virtual Reality (VR), Augmented Reality (AR), and the Metaverse hold immense promise for revolutionising VCC training, collaboration, and visualisation. © The Author(s) 2024.

关键词： Centrifugal casting

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