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Online coal dust suppression system for opencast coal mines

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International Journal of Coal Science & Technology 2023年第5期10卷 178-186页

作者： Senju Panicker S.S.Shankar S.Jithin S.Sandeep Muhammed Irshad Jerry Daniel Tarique Sajad Control and Instrumentation Group Centre for Development of Advanced ComputingThiruvananthapuramKeralaIndia Mining Electronics Department Central Mine Planning and Design InstituteRanchiJharkhandIndia

Coal is the major source of power in India and world *** mining is an essential industry which has a major role in the economic development of the *** major mining activities contribute directly or indirectly to air *** dust is a major air pollutant which affects the personal working in the mines and also people residing in villages near the *** pollution due to coal particulates can affect human health and cause damages to the *** effective pollution control mechanisms are needed to keep the pollution levels within permissible *** easiest and most common method employed for dust suppression worldwide is sprinkling of *** majority of mines,water sprinklers are operated manually and can lead to wastage of water due to over *** can also prove to be ineffective in dust suppression if sprinkling is not done *** paper proposes a system which can be deployed to automate the dust suppressions *** system will monitor the concentration of PM_(10) and PM_(2.5) in the air and initiate sprinkling operation when the particulate matter content exceeds preconfigured limits.

关键词： Coal dust Dust suppression Sprinkling Automation Particulate matter PMio-PM2.5

Nodes2STRNet for structural dense displacement recognition by deformable mesh model and motion representation

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International Journal of Mechanical system Dynamics 2023年第3期3卷 229-250页

作者： Jin Zhao Hui Li Yang Xu Key Lab of smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of TechnologyHarbinChina Key Lab of Structures Dynamics Behavior and Control of the Ministry of Education Harbin Institute of TechnologyHarbinChina School of Civil Engineering Harbin Institute of TechnologyHarbinChina Department of system design and Simulation Goldwind Science and Technology Co.Ltd.BeijingChina

Displacement is a critical indicator for mechanical systems and civil *** vision-based displacement recognition methods mainly focus on the sparse identification of limited measurement points,and the motion representation of an entire structure is very *** study proposes a novel Nodes2STRNet for structural dense displacement recognition using a handful of structural control nodes based on a deformable structural three-dimensional mesh model,which consists of control node estimation subnetwork(NodesEstimate)and pose parameter recognition subnetwork(Nodes2PoseNet).NodesEstimate calculates the dense optical flow field based on FlowNet 2.0 and generates structural control node ***2PoseNet uses structural control node coordinates as input and regresses structural pose parameters by a multilayer perceptron.A self-supervised learning strategy is designed with a mean square error loss and L2 regularization to train *** effectiveness and accuracy of dense displacement recognition and robustness to light condition variations are validated by seismic shaking table tests of a four-story-building *** studies with image-segmentation-based Structure-PoseNet show that the proposed Nodes2STRNet can achieve higher accuracy and better robustness against light condition *** addition,NodesEstimate does not require retraining when faced with new scenarios,and Nodes2PoseNet has high self-supervised training efficiency with only a few control nodes instead of fully supervised pixel-level segmentation.

关键词： structural dense displacement recognition deformable structural mesh model deep-learning-based monocular vision self-supervised learning

Modeling and Analyzing Web Application with Aspect-Oriented Hierarchical Coloured Petri Nets

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China Communications 2016年第5期13卷 89-102页

作者： Xiaoxing Sun Huiqun Yu Honghao Liang Nianhua Yang Department of Computer Science and Engineering East China University of Science and Technology Department of system Technology East China University of Science and Technology Library Shanghai No NDA smart Technology Co Ltd. School of Business Information Shanghai University of International Business and Economics

Aspect-oriented modeling can uncover potential design faults, yet most existing work fails to achieve both separation and composition in a natural and succinct way. This study presents an aspect-oriented modeling and analysis approach with hierarchical Coloured Petri Nets(HCPN). HCPN has sub-models and well-defined semantics combining a set of submodels. These two characteristics of HCPN are nicely integrated into aspect oriented modeling. Submodels are used to model aspects while the combination mechanism contributes to aspects weaving. Furthermore, the woven aspect oriented HCPN model can be simulated and analyzed by the CPN Tools. A systematic web application case study is conducted. The results show the system original properties are satisfied after weaving aspects and all design flaws are revealed. As such, the approach can support web application design and analysis in an aspect-oriented fashion concisely and effectively.

关键词： aspect-oriented modeling hierarchical coloured Petri net CPN Tools ASKCTL

Evidence-based Nomenclature and Taxonomy of Research Impact Indicators

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Journal of Data and Information Science 2020年第3期5卷 33-56页

作者： Mudassar Arsalan Omar Mubin Abdullah Al Mahmud School of Computer Data and Mathematical SciencesWestern Sydney UniversityAustralia centre for design Innovation Swinburne University of TechnologyAustralia

Purpose: This study aims to classify research impact indicators based on their characteristics and scope. A concept of evidence-based nomenclature of research impact(RI) indicator has been introduced for generalization and transformation of scope. design/methodology/approch: Literature was collected related to the research impact assessment. It was categorized in conceptual and applied case studies. One hundred and nineteen indicators were selected to prepare classification and nomenclature. The nomenclature was developed based on the principle—"every indicator is a contextual-function to explain the impact". Every indicator was disintegrated into three parts, i.e. Function, Domain, and Target ***: The main functions of research impact indicators express improvement(63%), recognition(23%), and creation/development(14%). The focus of research impact indicators in literature is more towards the academic domain(59%) whereas the environment/sustainability domain is least considered(4%). As a result, research impact related to the research aspects is felt the most(29%). Other target areas include system and services, methods and procedures, networking, planning, policy development, economic aspects and commercialisation, etc. Research limitations: This research applied to 119 research impact indicators. However, the inclusion of additional indicators may change the result. Practical implications: The plausible effect of nomenclature is a better organization of indicators with appropriate tags of functions, domains, and target areas. This approach also provides a framework of indicator generalization and transformation. Therefore, similar indicators can be applied in other fields and target areas with modifications. Originality/value: The development of nomenclature for research impact indicators is a novel approach in scientometrics. It is developed on the same line as presented in other scientific disciplines, where fundamental objects need to classify on com

关键词： Research impact Nomenclature of indicators Scientometrics Classification of indicators

Selective butyric acid production from CO_(2)and its upgrade to butanol in microbial electrosynthesis cells

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Environmental Science and Ecotechnology 2024年第1期17卷 119-127页

作者： Meritxell Romans-Casas Laura Feliu-Paradeda Michele Tedesco Hubertus V.M.Hamelers Lluis Bañeras M.Dolors Balaguer SebastiàPuig Paolo Dessì Institute of the Environment University of Girona.Campus MontiliviCarrer Maria Aurélia Capmany 69E-17003GironaSpain Molecular Microbial Ecology Group Institute of Aquatic EcologyUniversity of GironaMaria Aurelia Capmany 4017003GironaSpain Wetsus European Centre of Excellence for Sustainable Water TechnologyOostergoweg 98911MALeeuwardenthe Netherlands

Microbial electrosynthesis(MES)is a promising carbon utilization technology,but the low-value products(i.e.,acetate or methane)and the high electric power demand hinder its industrial *** this study,electrically efficient MES cells with a low ohmic resistance of 15.7 mU m^(2)were operated galvanostatically in fed-batch mode,alternating periods of high CO_(2)and H2 *** promoted acetic acid and ethanol production,ultimately triggering selective(78%on a carbon basis)butyric acid production via chain *** average production rate of 14.5 g m^(-2)d^(-1)was obtained at an applied current of 1.0 or 1.5 mA cm^(-2),being Megasphaera *** key chain elongating *** a second cell with the catholyte containing the enriched community resulted in butyric acid production at the same rate as the previous cell,but the lag phase was reduced by 82%.Furthermore,interrupting the CO_(2)feeding and setting a constant pH2 of 1.7e1.8 atm in the cathode compartment triggered solventogenic butanol production at a pH below *** efficient cell design resulted in average cell voltages of 2.6e2.8 V and a remarkably low electric energy requirement of 34.6 kWhel kg1 of butyric acid produced,despite coulombic efficiencies being restricted to 45%due to the cross-over of O_(2)and H2 through the *** conclusion,this study revealed the optimal operating conditions to achieve energy-efficient butyric acid production from CO_(2)and suggested a strategy to further upgrade it to valuable butanol.

关键词： Biocathode Bioelectrochemical system Chain elongation Hydrogen partial pressure Megasphaera

Exploring Barriers and Opportunities in Adopting Crowdsourcing Based New Product Development in Manufacturing SMEs

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Chinese Journal of Mechanical Engineering 2016年第6期29卷 1052-1066页

作者： QIN Shengfeng David VAN der VELDE Emmanouil CHATZAKIS Terry McSTEA Neil SMITH School of design Northumbria University Newcastle upon Tyne NE1 3PH UK Consult and design International Sunderland SR1 1PB UK School of Arts & Media Teesside University Middlesbrough TS1 3BX UK RTCNorth Northern Design Centre Gateshead Tyne and Wear NE8 3DE UK

Crowdsourcing is an innovative business practice of obtaining needed services, ideas, or content or even funds by soliciting contributions from a large group of people （the ＇Crowd＇）. The potential benefits of utilizing crowdsourcing in product design are well-documented, but little research exists on what are the barriers and opportunities in adopting crowdsourcing in new product development （NPD） of manufacturing SMEs. In order to answer the above questions, a Proof of Market study is carried out on crowdsourcing-based product design under an Innovate UK funded smart project, which aims at identifying the needs, challenges and future development opportunities associated with adopting crowdsourcing strategies for NPD. The research findings from this study are reported here and can be used to guide future development of crowdsourcing-based collaborative design methods and tools and provide some practical references for industry to adopt this new and emerging collaborative design method in their business.

关键词： new product development open design innovation collaborative design crowdsourcing manufacturing SMEs

An Ultra‑Durable Windmill‑Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low‑Speed Wind Energy

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Nano-Micro Letters 2020年第12期12卷 228-238页

作者： Ying Zhang Qixuan Zeng Yan Wu Jun Wu Songlei Yuan Dujuan Tan Chenguo Hu Xue Wang Department of Applied Physics State Key Laboratory of Power Transmission Equipment and System Security and New TechnologyChongqing UniversityChongqing 400044People’s Republic of China Chongqing Key Laboratory of Soft Condensed Matter Physics and smart Materials Chongqing UniversityChongqing 400044People’s Republic of China

Wind energy is one of the most promising and renewable energy sources;however,owing to the limitations of device structures,collecting low-speed wind energy by triboelectric nanogenerators(TENGs)is still a huge *** solve this problem,an ultra-durable and highly efficient windmill-like hybrid nanogenerator(W-HNG)is ***,the W-HNG composes coupled TENG and electromagnetic generator(EMG)and adopts a rotational contact-separation *** unique design efficiently avoids the wear of friction materials and ensures a prolonged service ***,the generator group is separated from the wind-driven part,which successfully prevents rotation resistance induced by the friction between rotor and stator in the conventional structures,and realizes low-speed wind energy ***,the output characteristics of TENG can be complementary to the different performance advantages of EMG to achieve a satisfactory power *** device is successfully driven when the wind speed is 1.8 m s−1,and the output power of TENG and EMG can achieve 0.95 and 3.7 mW,*** power management,the W-HNG has been successfully applied as a power source for electronic *** work provides a simple,reliable,and durable device for improved performance toward large-scale low-speed breeze energy harvesting.

关键词： Triboelectric nanogenerator Windmill-like structure Rotational contact-separation mode Low-speed wind energy harvesting

Pneumatically Actuated Soft Robotic Arm for Adaptable Grasping

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Acta Mechanica Solida Sinica 2018年第5期31卷 608-622页

作者： Zhe Chen Xueya Liang Tonghao Wu Tenghao Yin Yuhai Xiang Shaoxing Qu State Key Laboratory of Fluid Power and Mechatronic system 38 Zheda Road Hangzhou 310027 China Key Laboratory of Soft Machines and smart Devices of Zhejiang Province 38 Zheda Road Hangzhou 310027 China Department of Engineering Mechanics Zhejiang University 38 Zheda Road Hangzhou 310027 China

Developing robotic manipulators capable of performing effective physical interac- tion tasks is a challenging topic. In this study, we design a soft robotic arm （SRA） with multiple degrees of freedom inspired by the flexible structures and the unique motion mechanism of the octopus arm. The SRA is fabricated with elastomeric materials, which consists of four series of integrated pneumatic chambers that play similar roles as the muscles in the octopus arm can achieve large bending in various directions with variable stiffness. This SRA displays specified movements via controlling pressure and selecting channels. Moreover, utilizing parallel control, the SRA demonstrates complicated three-dimensional motions. The force response and motion of the SRA are determined both experimentally and computationally. The applications of the present SRA include tightly coiling around the objects because of its large bending deformation （nearly 360°）, grasping multiple objects, and adjusting the grabbing mode in accordance with the shape of objects.

关键词： Soft robotic arm Elastomeric materials Soft manipulation Variable stiffness actuation

A generic approach of integrating 3D models into virtual manufacturing

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Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第1期13卷 20-28页

作者： Hwa-Jen YAP Zahari TAHA Siti Zawiah Md DAWAL Department of Engineering design and Manufacture Faculty of Engineering University of Malaya Kuala Lumpur 50603 Malaysia centre for Product design and Manufacturing Faculty of Engineering University of Malaya Kuala Lumpur 50603 Malaysia Faculty of Manufacturing Engineering ＆ Technology Management Universiti Malaysia Pahang Kuantan26300 Malaysia

Various 3D modeling software has been developed for design and manufacturing. Most of the commercially available software uses native file formats, which may not be able to be read or understood by other software. This paper deals with the development of a generic approach of a 3D model conversion program for virtual manufacturing （VM）, using a lexical analyzer generator Lex and the Open Graphic Library （OpenGL）. The program is able to convert 3D mesh data between four universal file formats, i.e., Stereolithography （STL）, Virtual Reality Modeling Language （VRML）, eXtensible Markup Language （XML）, and Object （OBJ）. Simple assembly functions can be applied to the imported models. The quaternion angle is used for object rotation to overcome the problem of gimbal lock or a loss of one degree of rotational freedom. The program has been validated by importing the neutral format models into the program, applying the transformation, saving the new models with a new coordinate system, and lastly exporting into other commercial software. The results showed that the program is able to render and re-arrange accurately the geometry data from the different universal file formats and that it can be used in VM. Therefore, the output models from a VM system can be transferred or imported to another VM system in a universal file format.

关键词： Virtual manufacturing Lex OpenGL Three-dimensional mesh data Quatemion Neutral format