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Relationship of Isokinetic Leg Press Force with Jumping Performance and 1RM in the Squat

Journal of Science in Sport and Exercise 2022年第2期4卷 180-187页

作者： Sebastian Möck Stefan Erlewein Christoph Mickel Klaus Wirth Department of Exercise Science Olympic Training and Testing Center of HessenOtto-Fleck-Schneise 460528 Frankfurt am MainGermany Institute of Applied Training Science LeipzigGermany Athlyzer GmbH Frankfurt am MainGermany Sport and Exercise Sciences University of Applied Sciences Wiener NeustadtWiener NeustadtAustria

Purpose Muscle strength and power are important requirements in many *** correlation of jumping performance as manifestation of muscle power and squatting one-repetition maximum(1RM)has been shown in several *** with maximum force in a linear isokinetic leg press are still *** different testing devices produce different relationships and rotational isokinetic measurements show conflicting results,further evidence is *** We investigated the correlation of isokinetic leg press force at 0.1 m/s and 0.7 m/s with squat 1RM and jumping performance in different vertical *** The results show medium to strong,significant correlations for isokinetic force at 0.1 m/s with squat-and counter-movement-jump performance,whereas isokinetic force at 0.7 m/s showed strong,significant correlations for both jumping *** jump performance(dropping heights:20,30,40,and 50 cm,respectively)reveals weak to medium,significant correlations with isokinetic force at 0.1 m/s and weak,significant correlations with isokinetic force at 0.7 m/*** 1RM displays strong relationships to isokinetic force with greater coefficients regarding higher movement speed in the isokinetic *** The maximum strength of the leg extensors displays a basic requirement for vertical jumping with great motion in knee-and hip-joints and should be considered in training *** vertical jumps that are mainly generated via ankle motion,maximum strength of knee-and hip-extensors plays an indirect role to guarantee for performance-enhancing ***,in strength testing,different manifestations of strength performance should carefully be taken into account.

关键词： Isokinetics diagnostics Performance Resistance Training

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Analysis of Aluminum Dust Cloud Combustion Using Flame Emission Spectroscopy

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光谱学与光谱分析 2015年第9期35卷 2431-2438页

作者： Sanghyup Lee Kwanyoung Noh Woongsup Yoon Advanced Energy and Propulsion Laboratory Department of Mechanical EngineeringYonsei University

In this study,aluminum flame analysis was researched in order to develop a measurement method for high-energy-density metal aluminum dust cloud combustion,and the flame temperature and UV-VIS-IR emission spectra were precisely measured using a *** the micron-sized aluminum flame temperature was higher than 2 400 K,Flame temperature was measured by a non-contact optical technique,namely,a modified two-color method using 520 and 640nm light,as well as by apolychromatic fitting *** methods were applied experimentally after accurate *** flame temperature was identified to be higher than 2 400 Kusing both *** analyzing the emission spectra,we could identify AlO radicals,which occur dominantly in aluminum *** study paves the way for realization of a measurement technique for aluminum dust cloud combustion flames,and it will be applied in the aluminum combustors that are in development for military purposes.

关键词： Aluminum combustion Flame characteristics High-temperature measurement Emission spectroscopy diagnostics

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A combined technique of Kalman filter, artificial neural network and fuzzy logic for gas turbines and signal fault isolation

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Chinese Journal of Aeronautics 2021年第2期34卷 124-135页

作者： Simone TOGNI Theoklis NIKOLAIDIS Suresh SAMPATH Department of Power and Propulsion Cranfield UniversityCranfield MK-43United Kingdom

The target of this paper is the performance-based diagnostics of a gas turbine for the automated early detection of components malfunctions. The paper proposes a new combination of multiple methodologies for the performance-based diagnostics of single and multiple failures on a two-spool engine. The aim of this technique is to combine the strength of each methodology and provide a high success rate for single and multiple failures with the presence of measurement malfunctions. A combination of KF(Kalman Filter), ANN(Artificial Neural Network) and FL(Fuzzy Logic) is used in this research in order to improve the success rate, to increase the flexibility and the number of failures detected and to combine the strength of multiple methods to have a more robust solution. The Kalman filter has in his strength the measurement noise treatment, the artificial neural network the simulation and prediction of reference and deteriorated performance profile and the fuzzy logic the categorization flexibility, which is used to quantify and classify the failures. In the area of GT(Gas Turbine) diagnostics, the multiple failures in combination with measurement issues and the utilization of multiple methods for a 2-spool industrial gas turbine engine has not been investigated *** paper reports the key contribution of each component of the methodology and brief the results in the quantification and classification success rate. The methodology is tested for constant deterioration and increasing noise and for random deterioration. For the random deterioration and nominal noise of 0.4%, in particular, the quantification success rate is above 92.0%, while the classification success rate is above 95.1%. Moreover, the speed of the data processing(1.7 s/sample)proves the suitability of this methodology for online diagnostics.

关键词： Artificial neural network Data analytics Data filtering diagnostics Fuzzy logic Gas turbine Kalman filter Performance-based diagnostics

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Bench test of interferometer measurement for the Keda Reconnection eXperiment device(KRX)

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Plasma Science and Technology 2022年第6期24卷 32-37页

作者：刘东宽丁卫星毛文哲张乔枫桑龙龙陆全明谢锦林 CAS Key Lab of Geoscience Environment School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026People's Republic of China Department of Plasma Physics and Nuclear Engineering University of Science and Technology of ChinaHefei 230026People's Republic of China

Motivated by the need of the electron density measurement for the Keda Reconnection eXperiment(KRX)facility which is under development,an interferometer system has been designed and tested in *** 320 GHz solid-state microwave source with 1 mm wavelength is used to fulfill the high phase difference measurement in such low temperature plasma *** results of the bench test show that the phase difference is accurately *** contrast to tens of degrees of phase shift expected to be measured on the KRX,the system noise(~1°)is low enough for the KRX *** order to optimize the system for better performance,we utilize the Terasense sub-THz imaging system to adjust *** interferometer system has also been calibrated via changing of the optical path length controlled by the piezo inertial ***,high density polyethylene thin film is introduced successfully to change a tiny phase difference and test the sensitivity of the interferometer system.

关键词： magnetic reconnection diagnostics interferometer

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Laser produced electromagnetic pulses: generation, detection and mitigation

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High Power Laser Science and Engineering 2020年第2期8卷 88-146页

作者： Fabrizio Consoli Vladimir TTikhonchuk Matthieu Bardon Philip Bradford David CCarroll Jakub Cikhardt Mattia Cipriani Robert JClarke Thomas ECowan Colin NDanson Riccardo De Angelis Massimo De Marco Jean-Luc Dubois Bertr Etchessahar Alejro Laso Garcia David IHillier Ales Honsa Weiman Jiang Viliam Kmetik Josef Krása Yutong Li FredériéLubrano Paul McKenna Josefine Metzkes-Ng Alexre Poyé Irene Prencipe Piotr Ra¸czka Rol ASmith Roman Vrana Nigel CWoolsey Egle Zemaityte Yihang Zhang Zhe Zhang Bernhard Zielbauer David Neely ENEA Fusion and Technologies for Nuclear Safety DepartmentC.R.Frascati00044 FrascatiItaly CELIA University of BordeauxCNRSCEA33405 TalenceFrance ELI Beamlines Institute of PhysicsCzech Academy of Sciences25241 Dolni BrezanyCzech Republic CEA DAMCESTA33116 Le BarpFrance Department of Physics York Plasma InstituteUniversity of YorkHeslingtonYork YO105DDUK Central Laser Facility Rutherford Appleton LaboratorySTFCUKRIChiltonDidcotOxfordshire OX110QXUK Czech Technical University in Prague Faculty of Electrical Engineering16627 Prague 6Czech Republic Institute of Plasma Physics of the Czech Academy of Sciences Za Slovankou 318200 PragueCzech Republic Helmholtz-Zentrum Dresden-Rossendorf Institut fur Strahlenphysik01328 DresdenGermany AWE plc AldermastonReadingBerkshire RG74PRUK OxCHEDS Clarendon LaboratoryDepartment of PhysicsUniversity of OxfordOxford OX13PUUK CIFS The Blackett LaboratoryImperial College LondonLondon SW72AZUK Centro de Laseres Pulsados(CLPU) 37185 VillamayorSalamancaSpain Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Institute of Physics of the Czech Academy of Sciences Na Slovance 218221 PragueCzech Republic School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Physics Scottish Universities Physics Alliance(SUPA)University of StrathclydeGlasgow G40NGUK Laboratory PIIM University Aix-Marseille-CNRS13397 MarseilleFrance Institute of Plasma Physics and Laser Microfusion 01-497 WarsawPoland The Blackett Laboratory Imperial College LondonLondon SW72AZUK PHELIX Group GSI Helmholtzzentrum fur SchwerionenforschungD-64291 DarmstadtGermany

This paper provides an up-to-date review of the problems related to the generation,detection and mitigation of strong electromagnetic pulses created in the interaction of high-power,high-energy laser pulses with different types of solid *** includes new experimental data obtained independently at several international *** mechanisms of electromagnetic field generation are analyzed and considered as a function of the intensity and the spectral range of emissions they *** major emphasis is put on the GHz frequency domain,which is the most damaging for electronics and may have important *** physics of electromagnetic emissions in other spectral domains,in particular THz and MHz,is also *** theoretical models and numerical simulations are compared with the results of experimental measurements,with special attention to the methodology of measurements and complementary *** the underlying physical processes is the basis for developing techniques to mitigate the electromagnetic threat and to harness electromagnetic emissions,which may have promising applications.

关键词： electromagnetic pulses high-power lasers diagnostics mitigation techniques

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Design of Q-band FMCW reflectometry for electron density profile measurement on the Joint TEXT tokamak

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Plasma Science and Technology 2017年第2期19卷 101-107页

作者：万凌寒杨州军周若冰潘晓明张弛谢先立阮博文 State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074People's Republic of China

The Q-band （33-50 GHz） fast sweep frequency modulated continuous wave （FMCW） reflectometry has been recently developed for electron density profile measurement on the Joint TEXT tokamak. It operates in ordinary mode （O-mode） with a 20 μs sweeping period, covering the density range from 1 × 10^19m 3 to 3 × 10^19m-3. On the bench test, a Yttrium Iron Garnet （YIG） filter is used for the dynamic calibration of the voltage controlled oscillator （VCO） to obtain a linear frequency sweep. Besides, the use of a power combiner helps to improve the sideband suppression level of the single side-band modulator （SSBM）. The reconstructed density profiles are presented, which demonstrate the capability of the reflectometry.

关键词： reflectometry density plasma diagnostics

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Development of vacuum ultraviolet spectroscopy for measuring edge impurity emission in the EAST tokamak

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Plasma Science and Technology 2020年第8期22卷 8-13页

作者：张洪明吕波何梁沈永才陈俊符佳宾斌王勋禺王福地李颖颖张凌刘兵 Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China School of Nuclear Science and Technology University of South ChinaHengyang 421001People's Republic of China School of Physics and Electrical Engineering Anqing Normal UniversityAnqing 246011People's Republic of China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026People's Republic of China Institute of Fusion Science School of Physical Science and TechnologySouthwestern Jiaotong UniversityChengdu 610031People's Republic of China

The dominant wavelength range of edge impurity emissions moves from the visible range to the vacuum ultraviolet(VUV)range,as heating power increasing in the Experimental Advanced Superconducting Tokamak(EAST).The measurement provided by the existing visible spectroscopies in EAST is not sufficient for impurity transport studies for high-parameters ***,in this study,a VUV spectroscopy is newly developed to measure edge impurity emissions in *** Seya-Namioka VUV spectrometer(McPherson 234/302)is used in the system,equipped with a concave-corrected holographic grating with groove density of 600 grooves *** line emissions can be observed in the wavelength range ofλ=50-700 nm,covering VUV,near ultraviolet and visible *** observed vertical range is Z=-350-350 *** minimum sampling time can be set to 5 ms under full vertical binning(FVB)*** spectroscopy has been used to measure the edge impurity emission for the 2019 EAST experimental *** spectra are identified for several impurity species,i.e.,lithium(Li),carbon(C),oxygen(O),and iron(Fe).Several candidates for tungsten(W)lines are also measured but their clear identification is very difficult due to a strong overlap with Fe *** evolutions of impurity carbon emissions of CⅡat 134.5 nm and CⅢat 97.7 nm are analyzed to prove the system capability of time-resolved *** measurements of the VUV spectroscopy are very helpful for edge impurity transport study in the high-parameters plasma in EAST.

关键词： EAST tokamak impurity tungsten vacuum ultraviolet spectroscopy edge impurity emission plasma diagnostics

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Continuous Emission Spectrum Measurement for Electron Temperature Determination in Low-Temperature Collisional Plasmas

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Plasma Science and Technology 2011年第4期13卷 451-457页

作者：刘秋艳李弘陈志鹏谢锦林刘万东 CAS Key Laboratory of Basic Plasma Physics Department of Modern PhysicsUniversity of Science and Technology of China

Continuous emission spectrum measurement is applied for the inconvenient diagnos- tics of low-temperature collisional plasmas. According to the physical mechanism of continuous emission, a simplified model is presented to analyze the spectrum in low temperature plasma. The validity of this model is discussed in a wide range of discharge parameters, including electron tem- perature and ionization degree. Through the simplified model, the continuous emission spectrum in a collisional argon internal inductively coupled plasma is experimentally measured to determine the electron temperature distribution for different gas pressures and radio-frequency powers. The inverse Abel transform is also applied for a better spatially resoluted results. Meanwhile, the result of the continuous emission spectrum measurement is compared to that of the electrostatic double probes, which indicates the effectiveness of this method.

关键词： continuous emission spectrum diagnostics low-temperature plasma colli- sional plasma

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Particle image velocimetry for combustion measurements:Applications and developments

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Chinese Journal of Aeronautics 2018年第7期31卷 1407-1427页

作者： Fang CHEN Hong LIU School of Aeronautics and Astronautics Shanghai Jiao Tong University

In the last several decades, Particle Image Velocimetry（PIV） has reached a high degree of maturity as a laser diagnostic technique based on tracer particles, with significant improvements in accuracy, resolution, dynamic range, and as an extension to combustion measurements. To assess the recent developments and to project the future trends of using the PIV technique for combustion measurements, we review many key issues for measuring combustion flow fields. We introduce the representative applications of a supersonic combustor and swirling burner and summarize the promising prospects and further development requirements of PIV measurements in combustion flow fields.

关键词： Combustion diagnostics Tracer panicles Velocietry

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Engineering carbon quantum dots for photomediated theranostics

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Nano Research 2018年第1期11卷 1-41页

作者： Mahbub Hassan Vincent G. Gomes Alireza Dehghani Sara M. Ardekani School of Chemical and Biomolecular Engineering The University of Sydney NSW 2006 Australia

Carbon quantum dots （CQDs） have emerged as potential alternatives to classical metal-based semiconductor quantum dots （QDs） due to the abundance of their precursors, their ease of synthesis, high biocompatibility, low cost, and particularly their strong photoresponsiveness, tunability, and stability. Light is a versatile, tunable stimulus that can provide spatiotemporal control. Its interaction with CQDs elicits interesting responses such as wavelength-dependent optical emissions, charge/electron transfer, and heat generation, processes that are suitable for a range of photomediated bioapplications. The carbogenic core and surface characteristics of CQDs can be tuned through versatile engineering strategies to endow specific optical and physicochemical properties, while conjugation with specific moieties can enable the design of targeted probes. Fundamental approaches to tune the responses of CQDs to photo-interactions and the design of bionanoprobes are presented, which enable biomedical applications involving diagnostics and therapeutics. These strategies represent comprehensive platforms for engineering multifunctional probes for nanomedicine, and the design of QD probes with a range of metal-free and emer^in~ 2D materials.

关键词： carbon quantum dots nanobiophotonics therapeutics diagnostics nanomedicine

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