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An aptamer-based shear horizontal surface acoustic wave biosensor with a CVd-grown single- layered graphene film for high-sensitivity detection of a label-free endotoxin

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Microsystems & Nanoengineering 2020年第1期6卷 1247-1257页

作者： Junwang Ji Yiquan Pang dongxiao Li Zheng Huang Zuwei Zhang Ning Xue Yi Xu Xiaojing Mu Key Laboratory of Optoelectronic Technology&Systems Ministry of EducationInternational R&D Center of Micro-nano Systems and New Materials TechnologyChongqing University400044 ChongqingChina School of Chemistry and Chemical Engineering Chongqing University400030 ChongqingChina Department of Applied Physics Chongqing University401331 ChongqingChina Chongqing Acoustic-Optic-Electric Corporation China Electronic Technology Group Corporation400060 ChongqingChina Institute of Electronics Chinese Academy of Sciences100190 BeijingChina

The thickness of the sensitive layer has an important influence on the sensitivity of a shear horizontal surface acoustic wave(SH-SAW)biosensor with a delay-line structure and lower layer numbers of graphene produce better sensitivity for biological ***,a label-free and highly sensitive SH-SAW biosensor with chemical vapor deposition(CVd-)-grown single-layered graphene(SLG)for endotoxin detection was developed in this *** this methodology,SH-SAW biosensors were fabricated on a 36°Y-90°X quartz substrate with a base frequency of 246.2MHz,and an effective detection cell was fabricated using acrylic *** increase the surface hydrophilicity,chitosan was applied to the surface of the SLG ***,the aptamer was immobilized on the surface of the SLG film by cross-linking with ***,the sensitivity was verified by endotoxin detection with a linear detection ranging from 0 to 100 ng/mL,and the detection limit(LOd)was as low as 3.53 ng/*** addition,the stability of this type of SH-SAW biosensor from the air phase to the liquid phase proved to be excellent and the specificity was tested and verified by detecting the endotoxin obtained from Escherichia coli(***),the endotoxin obtained from Pseudomonas aeruginosa(***),and ***,this type of SH-SAW biosensor with a CVd-grown SLG film may offer a promising approach to endotoxin detection,and it may have great potential in clinical applications.

关键词： film surface layered

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reinforcement Learning Based Position Control of 1-dOF rotational Hydraulic Actuator

Reinforcement Learning Based Position Control of 1-DOF Rotat...

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Hokwon Kang Jin Tak Kim Sangsin Park Jungsan Cho Department of Robotics Engineering University of Science and Technology(UST) Daejeon Korea The Hydraulic Robot Laboratory Robot R&D Group Korea Institute of Industrial Technology(KITECH) Ansan South Korea

ISBN: (数字)9788993215380

ISBN: (纸本)9798331517939

In this study, we propose a reinforcement learning (rL) based position control method for a one-degree-of-freedom (1-dOF) rotational hydraulic actuator. Controlling hydraulic actuators is challenging due to their nonlinear characteristics and complex structure. reinforcement learning offers the advantage of enabling control through learning without requiring a detailed understanding of the model, using virtual environments. However, simulators do not perfectly replicate real-world conditions. To address this, we aim to enhance the fidelity of the simulation and improve the performance of reinforcement learning-based controllers by integrating real-world data into the simulation using deep neural networks (dNN). The reinforcement learning is trained using the Proximal Policy Optimization (PPO) algorithm, and it is validated through experiments with step and sine inputs.

关键词： Legged locomotion refining Hydraulic actuators Position control Virtual environments reinforcement learning Artificial neural networks Hydraulic systems Control systems Optimization

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Graphene oxide MgFe2O4 nanocomposites for Cr(VI) remediation: a comparative modeling study

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Nanotechnology for Environmental Engineering 2018年第1期3卷 1-11页

作者： Hosseini, Seyed Ali Talebipour, Sahar Neyestani, Mahmoud reza ranjan, Shivendu dasgupta, Nandita Department of Applied Chemistry Faculty of Chemistry Urmia University Urmia Iran Department of Chemistry Faculty of Science Zanjan University Zanjan Iran R&D and Technology Development E-Spin Nanotech Pvt Ltd SIDBI Incubation Center IIT Kanpur KanpurUttar Pradesh208016 India Nano-food Research Group School of Bio Sciences and Technology VIT University VelloreTamil Nadu India

The article describes the synthesis and application of magnesium ferrite nanoparticles (MgFe2O4 NPs) and engineered MgFe2O4 nanocomposites (NCs) by graphene oxide as green and easy separable magnetic adsorbents in removal of Cr(VI) from environmental pollutant. The statistical study of the adsorption process and optimization was accomplished with central composite design method of response surface methodology (rSM) approach. The optimum conditions, predicted by rSM, were achieved at pH, contact time, initial Cr(VI) concentration and adsorbent dosage of 2, 60 min, 40 mg L−1 and 0.15 g, respectively. The removal of Cr(VI) under optimum situations was 97%, and the achieved result in practice was found to be 99%. Pareto analysis suggests the importance relative order of the factors as: pH > concentration of Cr(VI) > time > adsorbent dosage under optimized situations. The engineered nanocomposite was further analyzed for real groundwater samples, and 92% Cr(VI) remediation was resulted. The study is the first study for efficient Cr(VI) remediation from real groundwater sample using novel engineered nanocomposites and has potential to have societal as well as industrial impact in the form of process or product development. © 2018, Springer International Publishing AG, part of Springer Nature.

关键词： Nanocomposites

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Self-Supervised Button recognition for Indoor Mobile robots

Self-Supervised Button Recognition for Indoor Mobile Robots

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International Symposium on Soft Computing and Intelligent Systems (SCIS)

作者： Jeong-Won Pyo Kwang-Hee Lee Jung-San Cho Tae-Yong Kuc Electrical and Computer Engineering SungKyunKwan University Suwon Korea Robot R&D Group Korea Institute of Industrial Technology Ansan korea

In recent years, with the rapid advances in technology, the precision and accuracy of indoor autonomous driving have also improved remarkably. However, despite the development of these technologies, there are still many difficulties to perform services through real mobile robots. In this paper, we focused on the mobile robot that drives in multiple spaces in a multi-story building using an elevator. In order to operate the elevator, the mobile robot must be able to operate by pressing the elevator button itself. To solve this problem, in this paper, we propose self-supervised button recognition. We created fake buttons for self-supervised learning and placed these on random backgrounds to increase the diversity of the dataset. In addition, the generated realistic buttons are re-generated like real buttons through a GAN. In experiments, we presented that our self-supervised button recognition was performed in an actual environment without separate labeling.

关键词： Training Self-supervised learning Pressing Generative adversarial networks Elevators Mobile robots Labeling

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Quantifying the effect of noise, vibration and motion on human performance in ship collision and grounding risk assessment 12

Quantifying the effect of noise, vibration and motion on hum...

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12th International Probabilistic Safety Assessment and Management Conference, PSAM 2014

作者： Montewka, Jakub Goerlandt, Floris Innes-Jones, Gemma Owen, douglas Hifi, Yasmine Porthin, Markus Aalto University Department of Applied Mechanics Marine Technology Research Group on Maritime Risk and Safety Espoo Finland EMEA Bristol United Kingdom Brookes Bell R and D Glasgow United Kingdom VTT Technical Research Centre of Finland Espoo Finland

risk-based design (rBd) methodology for ships is a relatively new and a fast developing discipline. However, quantification of human error contribution to the risk of collision or grounding within rBd has not been considered before. This paper introduces probabilistic models linking the effect of ship motion, vibration and noise with risk through the mediating agent of a crewmember. The models utilize the concept of Attention Management, which combines the theories described by dynamic Adaptability Model, Cognitive Control Model and Malleable Attentional resources Theory. To model the risk, an uncertainty-based approach is taken, under which the available background knowledge is systematically translated into a coherent network and the evidential uncertainty is qualitatively assessed. The obtained results are promising as the models are responsive to changes in the GdF nodes as expected. The models may be used as intended by naval architects and vessel designers, to facilitate risk-based ship design.

关键词： Bayesian networks

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A new calibration method and experimental study for kinematic parameters of industrial robot

A new calibration method and experimental study for kinemati...

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2020 International Conference on Artificial Intelligence and Electromechanical Automation, AIEA 2020

作者： Zhao, Honghua Zhao, Jian Lin, Yifei Han, Qifei Chen, Mianpeng University of Jinan School of Mechanical Engineering Jinan China Shandong University School of Control Science and Engineering Jinan China Shandong Institute of Intelligent Robot and Applied Technology Jining China GSK CNC Equipment Co. Ltd. CNC System R and D Department Guangzhou China

ISBN: (纸本)9781728182889

The accuracy of industrial robot kinematics parameters directly affects its absolute positioning accuracy. Based on Modify denavit-Hartenberg (Md-H) kinematics theory, a more accurate calibration method for kinematic parameters of industrial robots is proposed in this paper. It takes the kinematics parameters, deceleration ratio and coupling coefficient of the robot as error parameters to establish the error model. The calibration experiment and accuracy verification experiment are designed by laser tracker. After the introduction of the reduction ratio and the coupling coefficient calibration, the absolute positioning error of the robot in all directions has been greatly improved, and the overall average accuracy of the robot is increased by 91.42% compared with the uncalibrated, and is increased by 81.02% compared with the without introducing the deceleration ratio and coupling coefficient. © 2020 IEEE.

关键词： Kinematics

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Timing and noise analysis of five millisecond pulsars observed with MeerKAT

arXiv

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arXiv 2025年

作者： Chisabi, M. Andrianomena, S. Enwelum, U. Gasennelwe, E.G. Idris, A. Idogbe, E.A. Shilunga, S. Geyer, M. reardon, d.J. Okany, C.F. Shamohammadi, M. Shannon, r.M. Krishnan, V. Venkatraman Abbate, F. Kramer, M. Department of Physics & Astronomy University of Nigeria Nsukka410101 Nigeria Department of Physics The Copperbelt University Jambo Drive Kitwe21696 Zambia SARAO Liesbeek House River Park Liesbeek Parkway Settlers Way Cape Town7705 South Africa Department of Physics & Astronomy University of the Western Cape Cape Town7535 South Africa Department of Science Laboratory Technology University of Nigeria Nsukka Nigeria Department of Physics University of Botswana Gaborone Botswana National Space Research and Development Agency Centre for Basic Space Science Nsukka410102 Nigeria Department of Physics Chemistry and Material Science University of Namibia Private Bag 13301 Windhoek Namibia Group Department of Mathematics and Applied Mathematics University of Cape Town Rondebosch7701 South Africa Centre for Astrophysics and Supercomputing Swinburne University of Technology P.O. Box 218 HawthornVIC3122 Australia Australia Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 BonnD-53121 Germany INAF - Osservatorio Astronomico di Cagliari Via della Scienza 5 SelargiusI-09047 Italy

Millisecond pulsars (MSPs) in binary systems are precise laboratories for tests of gravity and the physics of dense matter. Their orbits can show relativistic effects that provide a measurement of the neutron star mass and the pulsars are included in timing array experiments that search for gravitational waves. Neutron star mass measurements are key to eventually solving the neutron star equation of state and these can be obtained by a measure of the Shapiro delay if the orbit is viewed near edge-on. Here we report on the timing and noise analysis of five MSPs observed with the MeerKAT radio telescope: PSrs J0900−3144, J0921−5202, J1216−6410, J1327−0755 and J1543−5149. We searched for the Shapiro delay in all of the pulsars and obtain weak detections for PSrs J0900−3144, J1216−6410, and J1327−0755. We report a higher significance detection of the Shapiro delay for PSr J1543−5149, giving a precise pulsar mass of Mp = 1.349+−00043061 M☉ and companion white-dwarf mass Mc = 0.223+−00005007 M☉. This is an atypically low mass measurement for a recycled MSP. In addition to these Shapiro delays, we also obtain timing model parameters including proper motions and parallax constraints for most of the pulsars. Copyright © 2025, The Authors. All rights reserved.

关键词： White dwarfs

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Characterization of Markarian 421 during its most violent year: Multiwavelength variability and correlations

arXiv

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arXiv 2025年

作者： Abe, K. Abe, S. Abhir, J. Abhishek, A. Acciari, V.A. Aguasca-Cabot, A. Agudo, I. Aniello, T. Ansoldi, S. Antonelli, L.A. Engels, A. Arbet Arcaro, C. Asano, K. Baack, d. Babić, A. de Almeida, U. Barres Barrio, J.A. Batković, I. Bautista, A. Baxter, J. González, J. Becerra Bednarek, W. Bernardini, E. Bernete, J. Berti, A. Besenrieder, J. Bigongiari, C. Biland, A. Blanch, O. Bonnoli, G. Bošnjak, Ž. Bronzini, E. Burelli, I. Campoy-Ordaz, A. Carosi, r. Carretero-Castrillo, M. Castro-Tirado, A.J. Cerasole, d. Ceribella, G. Chai, Y. Cifuentes, A. Colombo, E. Contreras, J.L. Cortina, J. Covino, S. d’Amico, G. d’Ammando, F. d’Elia, V. da Vela, P. dazzi, F. de Angelis, A. de Lotto, B. de Menezes, r. delfino, M. delgado, J. Mendez, C. delgado di Pierro, F. di Tria, r. di Venere, L. Prester, d. dominis donini, A. dorner, d. doro, M. Eisenberger, L. Elsaesser, d. Escudero, J. Fariña, L. Fattorini, A. Foffano, L. Font, L. Fröse, S. Fukami, S. Fukazawa, Y. López, r.J. García Garczarczyk, M. Gasparyan, S. Gaug, M. Paiva, J.G. Giesbrecht Giglietto, N. Giordano, F. Gliwny, P. Godinović, N. Gradetzke, T. Grau, r. Green, d. Green, J.G. Günther, P. Hadasch, d. Hahn, A. Hassan, T. Heckmann, L. Llorente, J. Herrera Hrupec, d. Imazawa, r. Ishio, K. Martínez, I. Jiménez Jormanainen, J. Kankkunen, S. Kayanoki, T. Kerszberg, d. Kluge, G.W. Kouch, P.M. Kubo, H. Kushida, J. Láinez, M. Lamastra, A. Leone, F. Lindfors, E. Lombardi, S. Longo, F. López-Coto, r. López-Moya, M. López-Oramas, A. Loporchio, S. Lorini, A. Majumdar, P. Makariev, M. Maneva, G. Manganaro, M. Mangano, S. Mannheim, K. Mariotti, M. Martínez, M. Martínez-Chicharro, M. Mas-Aguilar, A. Mazin, d. Menchiari, S. Mender, S. Miceli, d. Miener, T. Miranda, J.M. Mirzoyan, r. González, M. Molero Molina, E. Mondal, H.A. Moralejo, A. Morcuende, d. Nakamori, T. Nanci, C. Neustroev, V. Nickel, L. Nigro, C. Nikolić, L. Nilsson, K. Nishijima, K. Ekoume, T. Njoh Noda, K. Nozaki, S. Okumura, A. Otero-Santos, J. Paiano, S. Japanese MAGIC Group Department of Physics Tokai University Kanagawa Hiratsuka259-1292 Japan The University of Tokyo Chiba Kashiwa277-8582 Japan ETH Zürich ZürichCH-8093 Switzerland Università di Siena INFN Pisa SienaI-53100 Italy Bellaterra BarcelonaE-08193 Spain Universitat de Barcelona ICCUB IEEC-UB BarcelonaE-08028 Spain Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomía s/n Granada18008 Spain RomeI-00136 Italy Università di Udine INFN Trieste UdineI-33100 Italy Max-Planck-Institut für Physik GarchingD-85748 Germany Università di Padova INFN PadovaI-35131 Italy Technische Universität Dortmund DortmundD-44221 Germany Zagreb10000 Croatia URCA RJ Rio de Janeiro22290-180 Brazil IPARCOS Institute EMFTEL Department Universidad Com-plutense de Madrid MadridE-28040 Spain Instituto de Astrofísica de Canarias Dpto. de Astrofísica Universidad de La Laguna La Laguna TenerifeE-38200 Spain University of Lodz Faculty of Physics and Applied Informatics Department of Astrophysics Lodz90-236 Poland Centro de Investigaciones Energéticas Medioambientales y Tecnológicas MadridE-28040 Spain Departament de Física CERES-IEEC Universitat Autònoma de Barcelona BellaterraE-08193 Spain Università di Pisa INFN Pisa PisaI-56126 Italy INFN MAGIC Group INFN Sezione di Bari Dipartimento Interateneo di Fisica dell’Università e del Politecnico di Bari BariI-70125 Italy Department for Physics and Technology University of Bergen Norway INFN MAGIC Group INFN Sezione di Torino Università degli Studi di Torino TorinoI-10125 Italy Croatian MAGIC Group University of Rijeka Faculty of Physics Rijeka51000 Croatia Universität Würzburg WürzburgD-97074 Germany Japanese MAGIC Group: Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima739-8526 Japan ZeuthenD-15738 Germany Armenian MAGIC Group: ICRANet-Armenia Yerevan0019 Armenia Split21000 Croatia Croatian MAGIC Group J

Aims. Mrk 421 was in its most active state around early 2010, which led to the highest TeV gamma-ray flux ever recorded from any active galactic nuclei (AGN). We aim to characterize the multiwavelength behavior during this exceptional year for Mrk 421, and evaluate whether it is consistent with the picture derived with data from other less exceptional years. Methods. We investigated the period from November 5, 2009, (MJd 55140) until July 3, 2010, (MJd 55380) with extensive coverage from very-high-energy (VHE;E > 100 GeV) gamma rays to radio with MAGIC, VErITAS, Fermi-LAT, rXTE, Swift, GASP-WEBT, VLBA, and a variety of additional optical and radio telescopes. We characterized the variability by deriving fractional variabilities as well as power spectral densities (PSds). In addition, we investigated images of the jet taken with VLBA and the correlation behavior among different energy bands. results. Mrk 421 was in widely different states of activity throughout the campaign, ranging from a low-emission state to its highest VHE flux ever recorded. We find the strongest variability in X-rays and VHE gamma rays, and PSds compatible with power-law functions with indices around 1.5. We observe strong correlations between X-rays and VHE gamma rays at zero time lag with varying characteristics depending on the exact energy band. We also report a marginally significant (∼ 3σ) positive correlation between high-energy (HE;E > 100 MeV) gamma rays and the ultraviolet band. We detected marginally significant (∼ 3σ) correlations between the HE and VHE gamma rays, and between HE gamma rays and the X-ray, that disappear when the large flare in February 2010 is excluded from the correlation study, hence indicating the exceptionality of this flaring event in comparison with the rest of the campaign. The 2010 violent activity of Mrk421 also yielded the first ejection of features in the VLBA images of the jet of Mrk 421. Yet the large uncertainties in the ejection times of these unprece

关键词： Active Galactic Nuclei

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Experimental determination of the solubility of Co in the Cr-based carbides Cr23C6, Cr7C3, and Cr 3C2

Experimental determination of the solubility of Co in the Cr...

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作者： Kaplan, Bartek Markström, Andreas Norgren, Susanne Selleby, Malin Department of Materials Science and Engineering KTH Royal Institute of Technology Stockholm Sweden Sandvik Coromant R and D Stockholm Sweden Thermo-Calc Software AB Stockholm Sweden Ångström Tribomaterials Group Applied Materials Science Uppsala University Uppsala Sweden

Thermodynamic calculations based on the CALPHAd method are nowadays often applied in the design of new materials due to increasing demands on shorter lead times for development. However, such calculations rely heavily on the assessed thermodynamic descriptions, which in turn rely on the amount and quality of available experimental data, especially for binary and ternary sub-systems. The ternary Co-Cr-C system is an extremely important subsystem to, e.g., multi-component cemented carbide grades, such as W-Co-Cr-M-C (M = Ti,Ta,Nb,V,Zr,Hf), as well as Cr-containing Co-base alloys. In the case of the Co-Cr-C system, there is a lack of reliable data on the solubility of Co in Cr-carbides. Therefore, the present work concerns an experimental study of the solubility of Co in all three of the Cr-based carbides, i.e., Cr 23C6, Cr7C3, and Cr 3C2. This was done by synthesizing appropriate samples in the M7C3+M23C6+liquid and M 7C3+M3C2+graphite three-phase fields. The results show that a recent thermodynamic description of the Co-Cr-C system is unable to reproduce the experimentally determined solubilities. Therefore, the present study provides important input for future alloy development and improvement of the thermodynamic description of the Co-Cr-C system. © 2014 The Minerals, Metals & Materials Society and ASM International.

关键词： Carbides

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Object removal and Inpainting from Image using Combined GANs

Object Removal and Inpainting from Image using Combined GANs

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Jeongwon Pyo Yuri Goncalves rocha Arpan Ghosh Kwanghee Lee Gungyo In Taeyoung Kuc College of Information and Communication Engineering Sungkyunkwan University Suwon Korea Robot R&D Group Korea Institute of Industrial Technology Ansan Korea

ISBN: (数字)9788993215205

ISBN: (纸本)9781728185620

As recent research on deep learning methods has been actively conducted, a number of deep learning methods have been proposed. In this paper, we propose a method of removing the desired object from an image using generative adversarial networks(GANs) structure. We composed the network in which two GANs are fused. The first GAN erases the target object from the input image, and the second GAN generates an image that fills the empty space with the background. Through this network, we can erase the desired object from the input image and get an image with the erased part filled with the background without any object detection method. We show that the removal of people and vehicles from images of roads using the CityScapes dataset.

关键词： Generators Generative adversarial networks Training Image segmentation deep learning Annotations Semantics

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