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An integrated portable bio-monitoring system based on tough hydrogels f.r comprehensive detection of.physiological activities

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Nano Research 2024年第1期17卷 321-332页

作者： Congcong Yang Chenchen ji f.ngjiao Guo Chunjiang jin Hongyu mi Zhongchang Wang State Key Laboratory of.Chemistry and Utilization of.Carbon Based energy Resources School of Chemical Engineering and TechnologyXinjiang UniversityUrumqi 830017China international iberian Nanotechnology Laboratory(iNL) Avenide Mestre Jose VeigaBraga 4715-330Portugal

Advanced sof. ion-conducting hydrogels have been developed rapidly in the integrated portable health monitoring equipment due to their higher sensitivity,sensory traits,tunable conductivity,and stretchability f.r physiological activities and personal healthcare ***,traditional hydrogel conductors are normally susceptible to large def.rmation and strong mechanical stress,which leads to inf.rior electro-mechanical stability f.r real application ***,a strong ionically conductive hydrogel(poly(vinyl alcohol)-boric acid-glycerol/sodium alginate-calcium chloride/electrolyte ions(PBG/SC/ei))was designed by engineering the covalently and ionically crosslinked networks f.llowed by the salting-out ef.ect to f.rther enhance the mechanical strength and ionic conductivity of.the *** to the collective ef.ects of.the energy-dissipation mechanism and salting-out ef.ect,the designed PBG/SC/ei with excellent structural integrity and robustness exhibits exceptional mechanical properties(elongation at break f.r 559.1%and tensile strength of.869.4 kPa)and high ionic conductivity(1.618 S·m^(-1)).As such,the PBG/SC/ei strain sensor f.atures high sensitivity(gauge f.ctor=2.29),which can ef.ectively monitor various kinds of.human motions(joint motions,f.cial micro-expression,f.int respiration,and voice recognition).Meanwhile,the hydrogel-based Zn||MnO_(2)battery delivers a high capacity of.267.2 mAh·g^(-1)and a maximal energy density of.356.8 Wh·kg^(-1)associated with good cycle perf.rmance of.71.8%capacity retention af.er 8000 ***,an integrated bio-monitoring system with the sensor and Zn||MnO_(2)battery can accurately identif. diverse physiological activities in a real-time and non-invasive *** work presents a f.asible strategy f.r designing high-perf.rmance conductive hydrogels f.r highly-reliable integrated bio-monitoring systems with excellent practicability.

关键词： ionically conductive hydrogel strain sensor Zn-based battery integrated bio-monitoring system human motion monitoring

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Cavitation research with computational f.uid dynamics:f.om euler-euler to euler-Lagrange approach

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Journal of.Hydrodynamics 2024年第1期36卷 1-23页

作者： Bin ji Zi-yang Wang Huai-yu Cheng Rickard e.Bensow State Key Laboratory of.Water Resources engineering and Management Wuhan UniversityWuhan430072China Department of.Mechanics and Maritime Sciences Chalmers University of TechnologyGothenburgSweden

Unsteady cavitating f.ow of.en contains vapor structures with a wide range of.dif.erent length scales,f.om micro-bubbles to large cavities,which issues a big challenge to precisely investigate its evolution mechanism by computational f.uid dynamics(Cf.)*** present work reviews the development of.simulation methods f.r cavitation,especially the emerging euler-Lagrange ***,the progress of.the numerical investigation of.hot and vital issues is discussed,including cavitation inception,cloud cavitation inner structure and its f.rmation mechanism,cavitation erosion,and cavitation *** is indicated that the euler-Lagrange method can determine cavitation inception point *** cloud cavitation,the euler-Lagrange method can reveal the source of.microbubbles and their distribution law inside the shedding *** method also has advantages and great potential in assessing cloud cavitation-induced erosion and *** the ever-growing demands of.cavitation simulation accuracy in basic research and engineering applications,how to improve the euler-Lagrange method’s stability and applicability is still an open *** f.rther promote the application of.this advanced Cf. simulation technology in cavitation research,some key issues are to be solved and f.asible suggestions are put f.rward f.r f.rther work.

关键词： numerical simulation euler-euler method euler-Lagrange method bubble dynamicsgy,Gothenburg,Sweden

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On Some Properties of.Graph of.Pref.x Code

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Journal of.Applied Mathematics and Physics 2024年第4期12卷 1571-1581页

作者： Nikolai i. Krainiukov mikhail e. Abramyan Boris f. Melnikov f.culty of.Computational Mathematics and Cybernetics Shenzhen MSU-BIT University Shenzhen China Department of.Algebra and Discrete Mathematics Southern Federal University Rostov-on-Don Russian Federation

We investigate decomposition of.codes and f.nite languages. A prime decomposition is a decomposition of.a code or languages into a concatenation of.nontrivial prime codes or languages. A code is prime if.it cannot be decomposed into at least two nontrivial codes as the same f.r the languages. in the paper, a linear time algorithm is designed, which f.nds the prime decomposition. if.codes or f.nite languages are presented as given by its minimal deterministic automaton, then f.om the point of.view of.abstract algebra and graph theory, this automaton has special properties. The study was conducted using system f.r computational Discrete Algebra GAP. .

关键词： f.nite Languages minimal Deterministic Automata Concatenation Codes Graph of.Automaton f.ee Algebra

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On the “Onion Husk” Algorithm f.r Approximate Solution of.the Traveling Salesman Problem

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Journal of.Applied Mathematics and Physics 2024年第4期12卷 1557-1570页

作者： mikhail e. Abramyan Nikolai i. Krainiukov Boris f. Melnikov f.culty of.Computational Mathematics and Cybernetics Shenzhen MSU-BIT University Shenzhen China Department of.Algebra and Discrete Mathematics Southern Federal University Rostov-on-Don Russian Federation

The paper describes some implementation aspects of.an algorithm f.r approximate solution of.the traveling salesman problem based on the construction of.convex closed contours on the initial set of.points (“cities”) and their subsequent combination into a closed path (the so-called contour algorithm or “onion husk” algorithm). A number of.heuristics related to the dif.erent stages of.the algorithm are considered, and various variants of.the algorithm based on these heuristics are analyzed. Sets of.randomly generated points of.dif.erent sizes (f.om 4 to 90 and f.om 500 to 10,000) were used to test the algorithms. The numerical results obtained are compared with the results of.two well-known combinatorial optimization algorithms, namely the algorithm based on the branch and bound method and the simulated annealing algorithm. .

关键词： Branch and Bound Method Contour Algorithm “Onion Husk” Algorithm Simulated Annealing Method Traveling Salesman Problem

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A Hybrid Cybersecurity Algorithm f.r Digital image Transmission over Advanced Communication Channel Models

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Computers, Materials & Continua 2024年第4期79卷 201-241页

作者： Naglaa f.Soliman f.tma e.f.dl-Allah Walid el-Shaf.i Mahmoud i.Aly Maali Alabdulhaf.th f.thi e.Abd el-Samie Department of.inf.rmation Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of.electronics and Communications Faculty of EngineeringZagazig UniversityZagazig44519Egypt Security engineering Lab Computer Science DepartmentPrince Sultan UniversityRiyadh11586Saudi Arabia Department of.electronics and electrical Communications engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt

The ef.icient transmission of.images,which plays a large role inwireless communication systems,poses a signif.cant challenge in the growth of.multimedia ***-quality images require well-tuned communication *** Single Carrier f.equency Division Multiple Access(SC-f.MA)is adopted f.r broadband wireless communications,because of.its low sensitivity to carrier f.equency of.sets and low Peak-to-Average Power Ratio(PAPR).Data transmission through open-channel networks requires much concentration on security,reliability,and *** data need a space away f.omunauthorized access,modif.cation,or *** requirements are to be f.lf.lled by digital image watermarking and *** paper ismainly concerned with secure image communication over the wireless SC-f.MA systemas an adopted communication *** introduces a robust image communication f.amework over SC-f.MA that comprises digital image watermarking and encryption to improve image security,while maintaining a high-quality reconstruction of.images at the receiver *** proposed f.amework allows image watermarking based on the Discrete Cosine Transf.rm(DCT)merged with the Singular Value Decomposition(SVD)in the so-called DCT-SVD *** addition,image encryption is implemented based on chaos and DNA *** encrypted watermarked images are then transmitted through the wireless SC-f.MA *** linearminimumMean Square error(MMSe)equalizer is investigated in this paper to mitigate the ef.ect of.channel f.ding and noise on the transmitted *** subcarrier mapping schemes,namely localized and interleaved schemes,are compared in this *** study depends on dif.erent channelmodels,namely PedestrianAandVehicularA,with a modulation technique namedQuadratureAmplitude Modulation(QAM).extensive simulation experiments are conducted and introduced in this paper f.r ef.icient transmission of.encrypted watermarked *** addition,dif.erent variants of.SC-f.MA bas

关键词： Cybersecurity applications image transmission channel models modulation techniques watermarking and encryption

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Small Cycles Property of.Some Cremer Rational Maps and Polynomials

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Chinese Annals of.Mathematics,Series B 2024年第1期45卷 123-136页

作者： Rong f. ji ZHOU f.culty of.Science Yibin UniversityYibin 644000SichuanChina Department of.Mathematical Sciences Sichuan Normal UniversityChengdu 610066China

This paper concerns the linearization problem on rational maps of.degree d≥2 and polynomials of.degree d>2 f.om the perspective of.*** authors introduce a set l_(∞) of.irrational numbers and show that if.α∈l_(∞),then any rational map is not linearizable and has inf.nitely many cycles in every neighborhood of.the f.xed point with multiplier λ=e^(2πiα),Adding more constraints to cubic polynomials,they discuss the above problems by polynomial-like *** the f.mily of.polynomials,with the help of.Yoccoz's method,they obtain its maximum dimension of.the set in which the polynomials are non-linearizable.

关键词： irrationally indif.erent f.xed point Linearization problem Small cycles property

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The ef.ects of.local variations in conditions on carbon storage and release in the continental mantle

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National Science Review 2024年第6期11卷 22-36页

作者： Stephen f.f.ley Chunf.i Chen Dorrit e.Jacob School of.Natural Sciences Macquarie University Research School of.earth Sciences Australian National University State Key Laboratory of.Geological Processes and mineral Resources School of Earth Sciences China University of Geosciences

Recent advances indicate that the amount of.carbon released by gradual degassing f.om the mantle needs to be revised upwards, whereas the carbon supplied by plumes may have been overestimated in the *** in rock types and oxidation state may be very local and exert strong inf.uences on carbon storage and release mechanisms. Deep subduction may be prevented by diapirism in thick sedimentary packages,whereas carbonates in thinner sequences may be subducted. Carbonates stored in the mantle transition zone will melt when they heat up, recognized by coupled stable isotope systems(e.g. Mg, Zn, Ca). There is no single ‘mantle oxygen f.gacity’, particularly in the thermal boundary layer(TBL) and lowermost lithosphere, where very local mixtures of.rock types coexist. Carbonate-rich melts f.om either subduction or melting of.the uppermost asthenosphere trap carbon by redox f.eezing or as carbonate-rich dykes in this zone. Deeply derived, reduced melts may f.rm f.rther diamond reservoirs, recognized as polycrystalline diamonds associated with websteritic silicate minerals. Carbon is released by either edge-driven convection,which tears sections of.the TBL and lower lithosphere down so that they melt by a mixture of.heating and oxidation, or by lateral advection of.solids beneath rif.s. Both mechanisms operate at steps in lithosphere thickness and result in carbonate-rich melts, explaining the spatial association of.craton edges and carbonate-rich magmatism. High-pressure experiments on individual rock types, and increasingly on reactions between rocks and melts, are f.ne-tuning our understanding of.processes and turning up unexpected results that are not seen in studies of.single rocks. f.ture research should concentrate on elucidating local variations and integrating these with the interpretation of.geophysical signals. Global concepts such as average sediment compositions and a unif.rm mantle oxidation state are not appropriate f.r small-scale processes; an increa

关键词： lithospheric mantle carbonate melts deep carbon cycle craton destruction continental rif.s

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Converting TRex-RGB green-channel data to 557.7 nm auroral intensity:Methodology and initial results

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earth and Planetary Physics 2024年第1期8卷 258-274页

作者： Jun Liang D.M.Gillies e.Spanswick e.f.Donovan University of.Calgary CalgaryT2N 1N4Canada

The recently deployed Transition Region explorer(TRex)-RGB(red-green-blue)all-sky imager(ASi)is designed to capture“true color”images of.the aurora and *** the 557.7 nm green line is usually the brightest emission line in visible auroras,the green channel of.a TRex-RGB camera is usually dominated by the 557.7 nm *** this rationale,the TRex mission does not include a specif.c 557.7 nm imager and is designed to use the RGB green-channel data as a proxy f.r the 557.7 nm *** this study,we present an initial ef.ort to establish the conversion ratio or f.rmula linking the RGB green-channel data to the absolute intensity of.557.7 nm auroras,which is crucial f.r quantitative uses of.the RGB *** illustrate two approaches:(1)through a comparison with the collocated measurement of.green-line auroras f.om the TRex spectrograph,and(2)through a comparison with the modeled green-line intensity according to realistic electron precipitation f.ux measurements f.om low-earth-orbit satellites,with the aid of.an auroral transport *** demonstrate the procedures and provide initial results f.r the TRex-RGB ASis at the Rabbit Lake and Lucky Lake *** RGB response is f.und to be *** conversion ratios or f.rmulas between RGB green-channel data and the green-line auroral intensity are given and can be applied immediately by TRex-RGB data *** methodology established in this study will also be applicable to the upcoming SmiLe ASi mission,which will adopt a similar RGB camera system in its deployment.

关键词： TRex RGB green-line aurora auroral transport model

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endogenous Trypsin Triggers f.ee f.uoride Release f.om Antarctic Krill(euphausia superba)Cuticle

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Journal of.Ocean University of.China 2024年第3期23卷 766-774页

作者： PeNG Yuanhuai ji Wei ji Hongwu HAN Zhiping ZHANG Shiqi WeN Yaping College of.f.od Science and engineering Lingnan Normal UniversityZhanjiang 524048China College of.Biological and f.od engineering Guangdong University of EducationGuangzhou 510303China Guangdong Provincial Key Laboratory of.Aquatic Products Processing and Saf.ty Guangdong Ocean UniversityZhanjiang 524088China College of.f.od Science and Technology Guangdong Ocean UniversityZhanjiang 524088China College of.Continuing education Lingnan Normal UniversityZhanjiang 524048China

During postmortem storage,f.uoride in Antarctic krill can be enriched in the ***,as the most important digestive enzyme in Antarctic krill with a high activity in low temperature,plays a potential role in this *** this study,endogenous trypsin was purif.ed and its properties were *** involvement of.trypsin in the generation of.f.ee f.uoride f.om Antarctic krill cuticle was *** microstructure bef.re and af.er hydrolysis was compared with scanning electron microscopy,and the ash samples of.the hydrolyzed Antarctic krill cuticle were analyzed with X-ray dif.raction,f.urier transf.rm inf.ared spectroscopy,and electron dispersive spectroscopy,*** spectrometry analysis and inhibition tests conf.rmed that the purif.ed enzyme was endogenous *** of.the present study indicated that trypsin digestion caused the increases of.the concentrations of.both f.uoride ions and f.ee amino N simultaneously,while the protein coated on the cuticle surf.ce was dissolved ***,no compositional change was detected in the cuticle inorganic *** f.ndings suggest that trypsin triggered f.ee f.uoride release f.om Antarctic krill *** addition,the kinetics of.f.ee f.uoride release could be described by the equation C_(W)=(1-0.97^(-0.006t)-0.03e^(0.0558t))×337.53+*** present study improved the understanding of.the role of.trypsin in f.ee f.uoride release f.om Antarctic krill cuticle,f.cilitating f.ture studies aimed at reducing the f.uoride content in krill protein during Antarctic krill processing.

关键词： Antarctic krill cuticle f.uoride trypsin

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f.uid-rock interaction experiments with andesite at 100℃ f.r potential carbon storage in geothermal reservoirs

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Deep Underground Science and engineering 2024年第3期3卷 369-382页

作者： Grace e.Belshaw elisabeth Steer Yukun ji Herwin Azis Benyamin Sapiie Bagus Muljadi Veerle Vandeginste School of.Chemistry University of NottinghamNottinghamUK Geoenergy Research Centre University of NottinghamNottinghamUK British Geological Survey KeyworthUK State Key Laboratory of.intelligent Construction and Healthy Operation and Maintenance of.Deep Underground engineering China University of Mining and TechnologyXuzhouChina PT Supreme energy JakartaIndonesia f.culty of.earth Sciences and Technology Institut Teknologi BandungBandungIndonesia f.culty of.engineering University of NottinghamNottinghamUK Department of.Materials engineering KU LeuvenCampus BrugesBrugesBelgium

Geothermal energy extraction of.en results in the release of.naturally occurring carbon dioxide(CO_(2))as a *** on carbon storage using volcanic rock types other than basalt under both acidic and elevated temperature conditions has been limited so *** study uses batch reactor experiments at 100℃ to investigate the dissolution of.andesite rock samples obtained f.om an active geothermal reservoir in Sumatra(indonesia).The samples are subjected to reactions with neutral-pH f.uids and acidic f.uids,mimicking the geochemical responses upon reinjection of.geothermal f.uids,either without or with dissolved acidic gases,*** elemental analysis reveals the release of.Ca^(2+)ions into the f.uids through the dissolution of.*** overall dissolution rate of.the rock samples is 2.4×10^(–11)to 4.2×10^(–11)mol/(m^(2)·s),based on the Si release during the initial 7 h of.the *** dissolution rates are about two orders of.magnitude lower than those reported f.r basaltic rocks under similar reaction *** study of.ers valuable insights into the potential utilization of.andesite reservoirs f.r ef.ective CO_(2) storage via mineralization.

关键词： andesite carbon sequestration geothermal reservoirs plagioclase dissolution

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