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Neural Regeneration Research 2025年第11期20卷 3217-3218页

作者： Laura Huggon emma L.Clayton UK Dementia Research Institute at King’s College London LondonUK Department of.basic and Clinical Neuroscience Institute of Psychiatry Psychology&NeuroscienceKing’s College LondonLondonUK

f.ontotemporal dementia and amyotrophic lateral sclerosis:f.ontotemporal dementia(f.T D)and amyo t rophic lateral sclerosis(ALS)are neurodegenerative diseases with signif.cant overlapping *** these neurodegenerative diseases af.ect dif.erent neuronal populations(with f.D af.ecting neurons of.the f.ontal and temporal lobes,and ALS af.ecting upper and lower motor neurons),these two diseases are complexly *** and ALS exist on a disease spectrum,with shared genetic causes,clinical presentations,and pathologies.

关键词： diseases amyotrophic sclerosis

Three-dimensional simulation of.long-wavelength f.ee-electron lasers with helical wiggler and ion-channel guiding

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Chinese Physics b 2013年第7期22卷 183-191页

作者： f. Jaf.ri bahman b. Maraghechi Department of.Physics Amirkabir University of Technology

A three-dimensional simulation of.a steady-state amplif.er model of.a long-wavelength f.ee-electron laser （f.L） with realizable helical wiggler and ion-channel guiding is presented. The set of.coupled nonlinear dif.erential equations f.r electron orbits and f.elds of.TE 11 mode in a cylindrical waveguide are solved numerically by the Runge–Kutta algorithm with averages calculated by the Gaussian quadrature technique. Self.f.elds and space-charge ef.ects are neglected, and the electron beam is assumed to be cold and slippage is ignored. The parameters correspond to the Compton regime. Evolution of.the radiation power and growth rate along the wiggler is studied. Ion-channel density is chosen to obtain optimum ef.iciency. Simulations are pref.rmed f.r the f.L operating in the neighborhood of.35 GHz and 16.5 GHz f.r the electron beam energies of.250 keV and 400 keV, respectively. The result of.the saturated ef.iciency was f.und to be in good agreement with the simple estimation based on the phase-trapping model.

关键词： f.ee-electron laser helical wiggler ion-channel guiding

Interf.cial ef.ects in electromagnetic coupling within piezoelectric phononic crystals

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Acta Mechanica Sinica 2009年第1期25卷 95-99页

作者： f. J. Sabina A.b.Movchan Instituto de Investigaciones en Matematicas Aplicadas yen Sistemas Universidad Nacional Autónoma de México Department of.Mathematical Sciences University of Liverpool

In this paper, we discuss waves in piezoelectric periodic composite, with the emphasis on the connection between the electromechanical coupling and the ef.ects of.dispersion of.bloch-f.oquet waves. A particular attention is given to structures containing interf.ces between dissimilar media and localization of.the electrical f.elds near such interf.ces.

关键词： Piezoelectric periodic composites Interf.ces Dispersion of.bloch-f.oquet waves

Electron Acceleration by Microwave Radiation Inside a Rectangular Waveguide

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Plasma Science and Technology 2011年第3期13卷 357-361页

作者： b. f. MOHAMED A.M. GOUDA Plasma Physics Department N.R.C. Atomic Energy Authority Cairo Egypt

Electron dynamics in the f.elds associated with a transverse magnetic （TM） wave propagating inside a rectangular waveguide is analytically studied. The relativistic momentum and energy equations f.r an electron are solved, which was injected initially along the propagation direction of.the microwave. Expressions of.the acceleration gradient and def.ection angle are obtained. In principle, it is shown that the electron can be accelerated in this condition and there is no def.ection when the electron is injected f.om the centre of.the waveguide f.ont. However, it is f.und that the acceleration gradient and def.ection angle depend strongly on the parameters of.the microwave （intensity, f.equency, etc.） and the dimensions of.the waveguide.

关键词： waveguide electron acceleration polarized microwave

Ab-Initio Study of.Cobalt Impurity Ef.ects on Phonon Spectra, Mechanical and Thermal Properties of.Single Wall Carbon Nanotube （5,0）

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Chinese Physics Letters 2014年第4期31卷 110-113页

作者： H. Tashakori b. Khoshnevisan f. Kanjouri f.culty of.Physics University of Kashan Kashan Iran f.culty of.Physics Kharazmi University Karaj Iran

We use density f.nctional perturbation theory based on the pseudo-potential to calculate the phonon spectrum, phonon density of.states, specif.c heat capacity and mechanical properties of.pristine and cobalt doped （5,0） single wall carbon nanotube （CNT）. In the calculations, we consider one Co atom in the center of.the unit cell of.the tube and it is shown that the pristine （5~0） CNT is nonmagnetic while the Co-doped tube becomes magnetic. Young＇s modulus f.r both systems is about 1 TPa （＇af.er Co-doping it goes slightly higher） and the Poisson ratio f.r the pristine tube becomes quite a bit larger than the doped one. On the other hand, the calculated value of.radial breath mode f.r the pristine CNT is in good agreement with the experimental reports while af.er Co-doping it is increased. In addition, heat capacity of.the doped CNT is reduced, which leads to some important empirical applications.

关键词： CHEMICAL vapor deposition DENSITY f.nctional theory PERTURbATION (Mathematics) CARbON nanotubes POISSON'S ratio

Use of.f.rricyanide f.r gold and silver cyanidation

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中国有色金属学会会刊：英文版 2009年第3期19卷 714-718页

作者： f. XIE D. b. D REISINGER Department of.Materials Engineering University of British Columbia

Low gold and silver leaching kinetics has been commonly observed in traditional gold-silver cyanidation process, especially in heap leaching and in situ leaching operations. The dif.erent mineralogy of.gold and silver in the ores is suspected to be the main reason, e.g., the occurrence of.low solubility acanthite (Ag2S) typically results in low overall silver extraction. Due to the low solubility of.oxygen in cyanide solution, the reactivity and availability of.oxidant is believed to be the critical limitation f.r gold and silver dissolution. The use of.f.rricyanide as the auxiliary oxidant f.r gold and silver cyanidation has been examined. The rotating disc test results prove the assistant ef.ect of.f.rricyanide on increasing the dissolution rate of.gold and silver. The potential use of.f.rricyanide in gold/silver cyanidation process is proposed based on the leaching results of.actual ores.

关键词：氰化工艺金银浸出动力学铁助氧化剂氰化物溶液旋转圆盘溶解度

Quantif.ing Electrochemical Processes in batteries and beyond

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Energy & Environmental Materials 2022年第4期5卷 1001-1004页

作者： emma N.Antonio Michael f.Toney Materials Science and Engineering Program University of Colorado BoulderBoulderColorado 80309USA Joint Center f.r Energy Storage Research(JCESR) University of Colorado BoulderBoulderColorado 80309USA Department of.Chemical and biological Engineering University of Colorado BoulderBoulderColorado 80309USA Renewable and Sustainable Energy Institute University of Colorado BoulderBoulderColorado 80309USA

The correlation of.electrochemical measurements with materials characterization has advanced our understanding of.operation and degradation mechanisms in electrochemical energy storage and many other ***,of.en these correlations are qualitative,preventing the unambiguous identif.cation of.both operational principles and the root causes of.perf.rmance *** we suggest quantitative approaches to def.ne competing mechanisms and determine their relative *** illustrate the importance of.quantitative methodologies over a range of.electrochemical systems and highlight the need to consider the ef.ect of.the experimental design and measurement *** approaches will reveal the most detrimental degradation mechanisms and enable the development of.strategies to suppress,stabilize or eliminate them,leading to materials and devices with longer lif.times,reduced environmental impact,and improved perf.rmance.

关键词： electrochemistry in situ and operando characterization batteries quantif.cation materials science

4-Amino-1,8-naphthalimide based f.uorescent photoinduced electron transf.r (PET) pH sensors as liposomal cellular imaging agents: The ef.ect of.substituent patterns on PET directional quenching

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f.ontiers of.Chemical Science and Engineering 2020年第1期14卷 61-75页

作者： Miguel Martinez-Calvo Sandra A.bright emma b.Veale Adam f.Henwood D.Clive Williams Thorf.nnur Gunnlaugsson School of.Chemistry and Trinity biomedical Sciences Institute(TbSI) Trinity College DublinThe University of DublinDublin 2Ireland School of.biochemistry and Immunology and Trinity biomedical Sciences Institute(TbSI) Trinity College DublinThe University of DublinDublin 2Ireland Centro Singular de Investigacion en Quimica bioloxica e Materiais Moleculares(CIQUS)and Departamento de Quimica Organica Universidade de Santiago de Compostela Rua Jenaro de la Fuente s/n15782Santiago de CompostelaSpain

f.ur new f.uorescent sensors(1-4)based on the 4-amino-1,8-naphthalimide f.uorophores(Naps)have been synthesized based on the classical f.uorophore-spacer-receptor *** f.ur compounds all gave rise to emission b.nds centred at ca.535 nm,which were f.und to be highly pH dependent,the emission being‘switched on’in acidic media,while being quenched due to PET f.om the amino moieties to the excited state of.the Nap at more alkaline *** luminescent pH dependence f.r these probes was f.und to be highly dependent on the substitution on the imide site,as well as the polyamine chain attached to the position 4-amino *** the case of.sensor 2 the presence of.the 4-amino-aniline dominated the pH dependent ***,at higher pH,PET quenching was also f.und to occur f.om the polyamine ***,2 is better described as a receptor1-spacer1-f.uorophore-spacer2-receptor2 system,where the dominant PET process is due to(normally less f.vourable)‘directional’PET quenching f.om the 4-amino-aniline unit to the Nap *** trends and pH f.uorescence dependences were also seen f.r 3 and *** compounds were also tested f.r their imaging potential and toxicity against HeLa cells(using DRAQ5 as nuclear stain which does now show pH dependent changes in acidic and neutral pH)and the results demonstrated that these compounds have reduced cellular viability at moderately high concentrations(with IC50 values between ca.8-30μmol?L^?1),but were f.und to be suitable f.r intracellular pH determination at 1μmol?L^?1 concentrations,where no real toxicity was *** allowed us to employ these as lysosomal probes at sub-toxic concentrations,where the Nap based emission was f.und to be pH depended,mirroring that seen in aqueous solution f.r 1-4,with the main f.uorescence changes occurring within acidic to neutral pH.

关键词： sensors pH photoinduced electron transf.r cellular imaging conf.cal microscopy

Soil Pore Characterization Using f.ee Sof.ware and a Portable Optical Microscope

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Pedosphere 2013年第4期23卷 503-510页

作者： L. f. PIRES f. S. bORGES S. PASSONI A. b. PEREIRA Department of.Physics State University of Ponta Grossa (UEPG) Department of.Soil Science State University of Ponta Grossa (UEPG)

Total porosity （TP）, determined by image analysis, pore type and pore size distribution were evaluated on impregnated soil blocks f.om an undisturbed brazilian sandy loam soil using a digital portable optical microscope. The f.ee sof.ware Image J （version 1.40g） was used f.r image analysis. Procedures f.r soil image collection and analysis were presented. The image analysis allowed the evaluation of.pore sizes with diameters ranging f.om 20 to 〉 1 000 μm. The f.llowing types of.pores were also obtained： rounded, elongated and intermediate. The results M[owed the characterization of.the soil as moderately porous （TP = 21.6%）. Rounded, intermediate and elongated pores were responsible f.r 11.6%, 31.7% and 56.7% of.TP. In relation to pore size 51.1% of.TP was in the 100-500μm size class and a third of.TP came f.om the pores larger than 500μm.

关键词： image analysis soil porosity soil structure pore size distribution

Closed-f.rm solutions f.r f.ee vibration of.rectangular f.M thin plates resting on elastic f.undation

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Acta Mechanica Sinica 2016年第6期32卷 1088-1103页

作者： T. f. Xu Y. f. Xing Institute of.Solid Mechanics Beihang UniversityBeijing 100191 China China Academy of.Launch Vehicle Technology R&D Center Beijing 100076 China

This article presents closed-f.rm solutions f.r the f.equency analysis of.rectangular f.nctionally graded material (f.M) thin plates subjected to initially in-plane loads and with an elastic f.undation. based on classical thin plate theory, the governing dif.erential equations are derived using Hamilton's principle. A neutral surf.ce is used to eliminate stretching-b.nding coupling in f.M plates on the basis of.the assumption of.constant Poisson's ratio. The resulting governing equation of.f.M thin plates has the same f.rm as homogeneous thin plates. The separation-of.variables method is adopted to obtain solutions f.r the f.ee vibration problems of.rectangular f.M thin plates with separable boundary conditions, including, f.r example, clamped plates. The obtained normal modes and f.equencies are in elegant closed f.rms, and present f.rmulations and solutions are validated by comparing present results with those in the literature and f.nite element method results obtained by the authors. A parameter study reveals the ef.ects of.the power law index n and aspect ratio a/b on f.equencies.

关键词： f.nctionally graded material f.ee vibration Rectangular plate Close f.rm solutions Neutral surf.ce