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An Electrical Impedance Imaging System Towards Edge Intelligence for Non-Destructive Testing of Concrete

Tsinghua Science and Technology 2024年第3期29卷 883-896页

作者： Abolfazl Roshanpanah Mahdi Abbasi Hani Attar Ayman Amer Mohammad R.Khosravi Ahmed A.Solyman Department of Electrical engineering Islamic Azad UniversityScience and Research BranceTehran ***Iran Department of Computer engineering Bu-Ali Sina UniversityHamedan ***Iran Department of Energy engineering Zarqa UniversityZarqa 13110Jordan Department of Computer engineering Persian Gulf UniversityBushehr ***Iran Department of Electrical and Electronics engineering Faculty of Engineering and ArchitectureNişantaşıUniversityIstanbul 34398Turkey

In the construction industry,to prevent accidents,non-destructive tests are necessary and *** impedance tomography is a new technology in non-invasive imaging in which the image of the inner part of conductive bodies is reconstructed by the arrays of external electrodes that are connected on the periphery of the *** equipment is cheap,fast,and edge *** this imaging method,the image of electrical conductivity distribution(or its opposite;electrical impedance)of the internal parts of the target object is *** image reconstruction process is performed by injecting a precise electric current to the peripheral boundaries of the object,measuring the peripheral voltages induced from it and processing the collected *** an electrical impedance tomography system,the voltages measured in the peripheral boundaries have a non-linear equation with the electrical conductivity *** paper presents a cheap Electrical Impedance Tomography(eit)instrument for detecting impurities in the concrete.A voltage-controlled current source,a micro-controller,a set of multiplexers,a set of electrodes,and a personal computer constitute the structure of the *** conducted tests on concrete with impurities show that the designed eit system can reveal impurities with a good accuracy in a reasonable time.

关键词： non-destructive testing system concrete electrical impedance tomography

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Ground movement patterns and shallow foundation performance in Iskenderun coastline during the 2023 Kahramanmaras earthquake sequence

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Earthquake engineering and engineering Vibration 2023年第4期22卷 867-881页

作者： Tugce Baser Kamran Nawaz Albert Chung Seikh Faysal Ozgun Alp Numanoglu Department of Civil and Environmental engineering University of Illinois Urbana-ChampaignUrbanaIllinois 61801USA schnabel engineering 16300 Christensen Rd Suite 350TukwilaWA 98188USA

This study focuses on the field reconnaissance efforts for investigating ground deformation behavior and building foundation performance in *** structures experienced significant damage or collapsed due to strong ground shaking in the coastal Iskenderun district of Hatay during the 2023 Kahramanmaras earthquake *** buildings were also impacted by ground failure due to liquefaction of deposits in the *** information regarding the general subsurface profile and post-earthquake data collected during the reconnaissance was used to perform simplified liquefaction and lateral spreading *** empirical methods provide first order estimations of settlements and lateral spreading but are not sufficient when the nature of the structure-soil-structure interaction and earthquake sequence is *** of vertical displacements and building tilt,liquefaction manifestations,and structural and foundation parameters potentially affecting foundation settlements including foundation geometry,building contact pressure,and building elastic period were used to evaluate seismic response of the ground and the structures through empirical *** of the buildings exhibited poor to mediocre foundation performance due to liquefaction-prone subsurface profiles,especially on the *** field and numerical research will reveal the cause of significant ground failure in the area as well as refined estimates for the seismic deformations.

关键词： Turkiye earthquake Iskenderun settlement geo-structures liquefaction lateral spreading foundation performance building settlements seismic settlements

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Assessment of novel nature-inspired fuzzy models for predicting long contraction scouring and related uncertainties

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Frontiers of Structural and Civil engineering 2021年第3期15卷 665-681页

作者： Ahmad SHARAFATI Masoud HAGHBIN Mohammadamin TORABI Zaher Mundher YASEEN Department of Civil engineering Science and Research BranchIslamic Azad UniversityTehranIran Department of Structural Mechanics&Hydraulics engineering University of GranadaGranada18001Spain eit.schnabel engineering Chadds FordPA19317USA New Era and Development in Civil engineering Research Group Scientific Research CenterAl-Ayen UniversityThi-Qar64001Iraq

The scouring phenomenon is one of the major problems experienced in hydraulic *** this study,an adaptive neuro-fuzzy inference system is hybridized with several evolutionary approaches,including the ant colony optimization,genetic algorithm,teaching-learning-based optimization,biogeographical-based optimization,and invasive weed optimization for estimating the long contraction scour *** proposed hybrid models are built using non-dimensional information collected from previous *** proposed hybrid intelligent models are evaluated using several statistical performance metrics and graphical ***,the uncertainty of models,variables,and data are *** on the achieved modeling results,adaptive neuro-fuzzy inference system-biogeographic based optimization(ANFIS-BBO)provides superior prediction accuracy compared to others,with a maximum correlation coefficient(R_(test)=0.923)and minimum root mean square error value(RMSE_(test)=0.0193).Thus,the proposed ANFIS-BBO is a capable cost-effective method for predicting long contraction scouring,thus,contributing to the base knowledge of hydraulic structure sustainability.

关键词： long contraction scour prediction uncertainty ANFIS model meta-heuristic algorithm

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Ultra-high-Q free-space coupling to microtoroid resonators

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Light(Science & Applications) 2024年第4期13卷 682-695页

作者： Sartanee Suebka Euan McLeod Judith Su Wyant College of Optical Sciences University of ArizonaTucsonAZUSA Department of Biomedical engineering University of ArizonaTucsonAZUSA

Whispering gallery mode(WGM)microtoroid resonators are one of the most sensitive biochemical sensors in existence,capable of detecting single *** main barrier for translating these devices out of the laboratory is that light is evanescently coupled into these devices though a tapered optical *** hinders translation of these devices as the taper is fragile,suffers from mechanical vibration,and requires precise ***,we eliminate the need for an optical fiber by coupling light into and out from a toroid via free-space coupling and monitoring the scattered resonant light.A single long working distance objective lens combined with a digital micromirror device(DMD)was used for light injection,scattered light collection,and *** obtain Q-factors as high as 1:6´108 with this *** induced transparency(eit)-like and Fano resonances were observed in a single cavity due to indirect coupling in free *** enables improved sensing *** large effective coupling area(~10μm in diameter for numerical aperture=0.14)removes the need for precise *** performance was verified by combining the system with the frequency locked whispering evanescent resonator(FLOWER)approach to perform temperature sensing experiments.A thermal nonlinear optical effect was examined by tracking the resonance through FLOWER while adjusting the input *** believe that this work will be a foundation for expanding the implementation of WGM microtoroid resonators to real-world applications.

关键词： coupling scattered precise

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丝滑的顾客体验一定好吗

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商业评论 2024年第1期 116-123页

作者：马尔科·贝尔蒂尼(Marco Bertini) 迭戈·阿帕里西奥(Diego Aparicio) 艾林·艾丁利(Aylin Aydinli) 陈媛熙拉蒙尤以大学Esade商学院(Esade Ramon Llull University) Globalpraxis公司 IESE商学院阿姆斯特丹自由大学(Vrije Universit-eit Amsterdam)

许多公司都希望能够设计出将沮丧和不便降至最低的购物之旅."摩擦会扼杀顾客体验!"已成为举世公认的至理名言.人们认为,这条规律在为网购者服务时体现得尤为明显,因为谁都知道这类顾客耐心有限,注意力持续时间不长.毕竟,他们只需轻轻点...

许多公司都希望能够设计出将沮丧和不便降至最低的购物之旅."摩擦会扼杀顾客体验!"已成为举世公认的至理名言.人们认为,这条规律在为网购者服务时体现得尤为明显,因为谁都知道这类顾客耐心有限,注意力持续时间不长.毕竟,他们只需轻轻点击几下,就能跳转到竞争对手的网站.

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Extending microwave-frequency electric-field detection through single transmission peak method

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Chinese Physics B 2024年第5期33卷 417-423页

作者：刘青陈进湛王赫张杰阮伟民伍国柱郑顺元罗景庭宋振飞 College of Physics and Optoelectronic engineering Shenzhen UniversityShenzhen 518060China Shenzhen Institute for Technology Innovation National Institute of MetrologyShenzhen 518107China Center for Advanced Measurement Science National Institute of MetrologyBeijing 100029China

The strength of microwave(MW)electric field can be observed with high precision by using the standard electromagnetically induced transparency and Aulter–Towns(eit-AT)technique,when its frequency is resonant or nearly-resonant with the Rydberg transition *** the detuning of MW field increases,one of the transmission peaks(single peak)is easier to measure due to its increased *** can be found that the central symmetry point of the two transmission peaks f_(1/2)is only related to the detuning of MW field△_(MW)and central symmetry point f_(0)of resonant MW field,satisfying the relation f_(1/2)=△_(MW)/2+f_(0).Thus,we demonstrate a single transmission peak method that the MW E-field can be determined by interval between the position of single peak and f_(1/2).We use this method to measure continuous frequencies in a band from-200 MHz to 200 MHz of the MW *** experimental results and theoretical analysis are presented to describe the effectiveness of this *** 50 MHzeit-AT techniques or multiple atomic-level Rydberg atom schemes.

关键词： microwave electric field Rydberg atom electromagnetically induced transparency(eit) Aulter-Towns splitting

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Patterning Functionalized Surfaces of 2D Materials by Nanoshaving

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Nanomanufacturing and Metrology 2022年第1期5卷 23-31页

作者： Katie O'Neill Rob Greig Rita Tilmann Lisanne Peters Conor P.Cullen Graeme Cunningham Cian Bartlam Cormac O Coileain Niall McEvoy Georg S.Duesberg School of Physics Trinity College DublinDublin 2 D02 PN40Ireland AMBER Centre CRANN InstituteTrinity College DublinDublin 2Ireland Institute of Physics EIT 2Faculty of Electrical Engineering and Information TechnologyUniversitat der Bundeswehr Miinchen85579 NeubibergGermany School of Chemistry Trinity College DublinDublin 2Ireland

Atomic force microscopy(AFM)and scanning probe lithography can be used for the mechanical treatment of various surfaces,including polymers,metals,and *** technique of nanoshaving,in which materials are removed using the AFM tip,is employed in this work to produce nanopatterns of self-assembled monolayers(SAMs)on two-dimensional(2D)*** materials used are monolayers of transition metal dichalcogenides(TMDs),namely,MoS_(2)and WS_(2),which are noncovalently functionalized with perylene diimide(PDI),a perylene *** approach involves rastering an AFM probe across the surface at a controlled increased load in ambient *** a result of the strong bond between PDI SAM and TMD,loads in excess of 1|1N are required to pattern the *** predefined patterns,including a grating pattern with feature sizes below 250 nm,are *** indicate the high precision of nanoshaving as an accurate and nondestructive lithographic technique for 2D *** work functions of shaved heterostructures are also examined using Kelvin probe force microscopy.

关键词： Nanoshaving AFM KPFM Perylene diimide 2D materials MoS_(2) WS_(2) Noncovalent functionalization

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Reflections on architectural design education： The return of rationalism in the studio

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Frontiers of Architectural Research 2014年第4期3卷 424-430页

作者： Fathi Bashier Department of Architecture and Urban Planning EiT-M Mekelle University Mekelle Ethiopia

The design studio environment has remained the same throughout the past century. As the Studio Culture Task Force of the American Institute of Architecture Students （ALAS）（Koch et al., 2006） noted, the ongoing changes in architecture education are not aligned with today＇s fastchanging world, especially in the context of architectural practice. The AlAS analyzed the design studio problem and expressed doubts on the effectiveness of current studio practices in providing adequate design-thinking education. The report indicates that studio culture values project appearance instead of the actual design process. In recent years, similar problems have been the topic of debates in Khartoum. Criticisms are mostly centered on the observation that students show no interest in the design process and tend to focus on form making. As a result, efforts to teach design methods and to restore the balance between creativity and rationality in the design process have failed. The reason is related to the difficulties associated with the implicit nature of conventional design methods. These difficulties, which are common in architecture schools, include the lack of a clearly defined design methodology and the misunderstood role of the systematic approach to design in the studio. Nevertheless, signs of change are gradually emerging, as demonstrated by the global call for change in the studio environment. This call for change indicates a general agreement on the need for the reorientation of architectural design education toward an engaging policy that considers the social responsibility of architects. This study proposes that the route for change is through the return of rationalism in the studio. Since the 1960 s, many writers have recognized the importance of balancing rationality and creativity, which are mutually interdependent, in the design process. From this perspective, the research question is drawn： how can we bridge the gap between the rational and the creative design activit

关键词： Implicit method Criticism Design thinking Process Methodology Rationality and creativity Integrated design

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Microwave electrometry with Rydberg atoms in a vapor cell using microwave amplitude modulation

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Chinese Physics B 2024年第5期33卷 65-74页

作者：郝建海贾凤东崔越王昱寒周飞刘修彬张剑谢锋白金海尤建琦王宇钟志萍 School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China Science and Technology on Metrology and Calibration Laboratory Changcheng Institute of Metrology & MeasurementAviation Industry Corporation of ChinaBeijing 100095China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China

We have theoretically and experimentally studied the dispersive signal of the Rydberg atomic electromagneticallyinduced transparency(eit)Autler–Townes(AT)splitting spectra obtained using amplitude modulation of the microwave(MW)electric *** addition to the two zero-crossing points interval△f_(zeros),the dispersion signal has two positive maxima with an interval defined as the shoulder interval△f_(sho),which is theoretically expected to be used to measure a much weaker MW electric *** relationship of the MW field strength E_(MW)and△f_(sho)is experimentally studied at the MW frequencies of 31.6 GHz and 9.2 GHz *** results show that△f_(sho)can be used to characterize the much weaker E_(MW)than that of△f_(zeros)and the traditional eit–AT splitting interval△f_(m);the minimum E_(MW)measured by△f_(sho)is about 30 times smaller than that by△f_(m).As an example,the minimum E_(MW)at 9.2 GHz that can be characterized by△f_(sho)is 0.056 mV/cm,which is the minimum value characterized by the frequency interval using a vapor cell without adding any auxiliary *** proposed method can improve the weak limit and sensitivity of E_(MW)measured by the spectral frequency interval,which is important in the direct measurement of weak E_(MW).

关键词： quantum sensor Rydberg atoms electromagnetically induced transparency amplitude modulation

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Up-converting NaYF4:0.1%Tm^(3+), 20%Yb^(3+) nanoparticles as luminescent labels for deep-tissue optical imaging

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Journal of Rare Earths 2014年第3期32卷 207-212页

作者： A. Gnach K. Prorok M. Misiak B. Cichy A. Bednarkiewicz Wroc?aw Research Centre eit+ ul. Stab?owicka 147 54-066 Wroc?aw Poland Institute of Immunology and Experimental Therapy Institute of Low Temp & Structure Research

Optical imaging plays an important role in biomedical research being extremely useful for early detection, screening and image-guided therapy. Lanthanide-doped up-converting nanoparticles were ideally suited for bioimaging because they could be ex- cited in near infrared （NIR） and emit in NIR or visible （VIS）. Here, we compared lanthanide doped up-converting NaYF4 and organic fluorophores for application in deep-tissue imaging. For that purpose - tissue phantoms mimicking the natural properties of light scat- tering by living tissues were prepared. The studies allowed to quantitatively compare optical resolution of different fluorescent com- pounds, revealing that the NIR photoexcitation was favorable over conventional UV photoexcitation.

关键词： upconverting nanoparticles deep tissue bioimaging lanthanide-doped NPs fluorescent materials rare earths

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