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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

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

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： Wall Carbon Nanotube Ab-Initio pseudo-potential

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

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

Transcontinental Translational Medicine Collaboration: A Successf.l SinoCuban Joint b-to-b Program

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biomedical and Environmental Sciences 2013年第7期26卷 517-519页

作者： LU Kai CHEN Tao CHEN Yu George f. Gao Chinese Center f.r Disease Control and Prevention

Translational medicine is a comprehensive discipline that aims to convert laboratory research results into products and technology f.r clinical application using modern molecular biological techniques, to improve our understanding of.the human body and disease and to optimize laboratory design f.r clinical observation and analysis f.r basic research. Its ultimate goal is improving holistic medicine and helping patients solve their health problems. Translational medicine includes two processes： bench to bedside and bedside to bench, known as b-to-b processes. The f.rst b-to-b （bench to bedside） ref.rs to the application of.results of.the laboratory to clinical use as a medical product or a diagnosis and treatment technology. The second b-to-b （bedside to bench） describes the process by which clinical observation and analysis provides ideas and guidance f.r experiment design f.r basic medical research. The two processes complement each other and constitute the two-way cycle of.translational medicine. Translational medicine can be applied to clinical disease detection in the f.rm of.new biomarkers and can accelerate drug discovery. In recent years, with the biotechnology, increasing rapid development of.outcomes of.research on molecular pathogenesis can be directly applied to clinical theraDv.

关键词： Transcontinental Translational Medicine Collaboration A Successf.l SinoCuban Joint b-to-b Program

Neuroinf.ammation revisited through the microglial lens

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Neural Regeneration Research 2025年第7期20卷 1989-1990页

作者： Renato Socodato João b.Relvas Institute of.Research and Innovation in Health(i3S)and Institute f.r Molecular and Cell biology(IbMC) University of PortoPortoPortugal Department of.biomedicine Faculty of Medicine of the University of Porto(FMUP)PortoPortugal

Neuroimmunology is emerging as a pivotal f.eld,shedding light on the intricate dialogues between the central nervous system(CNS)and the immune *** exploration is particularly signif.cant in understanding microglia,the CNS’s innate immune cells,beyond the conventional conf.ation of.neuroinf.ammation”and“microglial activation.”This conf.ation has clouded the true complexity of.these processes,potentially stalling scientif.c progress and the development of.new *** challenge the long-standing perspectives that have oversimplif.ed these interactions,advocating f.r a deeper exploration of.the dynamic relationship between neuroinf.ammation and microglial *** dissecting specif.c molecular pathways,we aim to illuminate their elaborate roles in neuroinf.ammatory responses,especially in the context of.Alzheimer’s disease(AD).Here,neuroinf.ammation is not merely a passive observer or a direct antagonist but a complex agent in the disease’s *** article calls f.r a signif.cant paradigm shif. towards an integrative,multi-omics approach to *** such a comprehensive f.amework is crucial f.r advancing our understanding of.neuroinf.ammatory conditions and paving the way f.r targeted therapeutic strategies f.r brain diseases.

关键词： inf.ammation simplif.ed activation

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-bending 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

Resonance Conversion as the Ef.ective Way of.Triggering the ^（178m2）Hf.Isomer Energy

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Chinese Physics Letters 2006年第8期23卷 2049-2051页

作者： f. f.odor KARPESHIN M. b.TRZHASKOVSKAYA 张景波 Science Center and Department of.Physics Harbin Institute of Technology Harbin 150001 f.ck Institute of.Physics St. Petersburg State University RU-198504 St. Petersburg Russia PNPI RU-198355 St. Petersburg Leningrad District Russia

Experiments on photo-induced de-excitation triggering of.^（178m2）Hf.are revisited. We present an alternative and more ef.ective way of.triggering by exploiting the resonance internal conversion. f.ll theoretical description of.a possible channel is presented. It is theref.re revisited the impact itself.produced by those experiments.

关键词： Resonance Conversion Ef.ective Way