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Particuology 2016年第6期14卷 143-153页

作者： Amit Goel Anu Mittal s.s. Mallick Atul sharma Department of Mechanical Engineering Thapar University Patiala Punjab 147004 India

This paper presents the results of an ongoing investigation into transient pressure pulses using shan- non entropy. Pressure fluctuations （produced by gas-solid two-phase flow during fluidized dense-phase conveying） are recorded by pressure transducers installed at strategic locations along a pipeline. This work validates previous work on identifying the flow mode from pressure signals （Mittal, Mallick, ＆ Wypych, 2014）. Two different powders, namely fly ash （median particle diameter 45 μm, particle den- sity 1950 kg/m3. loosely poured bulk density 950 kg/m3） and cement （median particle diameter 15 p,m, particle density 3060 kg/m3, loosely poured bulk density 1070 kg/m3）, are conveyed through different pipelines （51 mm I.D. × 70 m length and 63 mm I.D. × 24 m length）. The transient nature of pressure fluc- tuations （instead of steady-state behavior） is considered in investigating flow characteristics. shannon entropy is found to increase along straight pipe sections for both solids and both pipelines. However, shannon entropy decreases after a bend. A comparison of shannon entropy among different ranges of superficial air velocity reveals that high shannon entropy corresponds to very low velocities （i.e. 3-5 m/s） and very high velocities （i.e. 11-14 m/s） while low shannon entropy corresponds to mid-range velocities （i.e. 6-8 m/s）.

关键词： Transient pressure fluctuations Fluidized dense phase shannon entropy Flow pattern solid loading ratio superficial air velocity

Friction-stir welding and processing of Ti-6Al-4V titanium alloy:A review

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Journal of Materials science & Technology 2018年第1期34卷 58-72页

作者： s.Mironov Y.s.sato H.Kokawa Department of Materials Processing Graduate School of Engineering Tohoku University

In this work, the current understanding and development of fliction-stir welding and processing of Ti- 6Al-4V alloy are briefly reviewed. The critical issues of these processes are addressed, including welding tool materials and design, tool wea,, processing temperature, material flow, processing window and residual stresses. A particular emphasis is given to microstructural aspects and microstructure-properties relationship. Potential engineering applications are highlighted.

关键词： Ti-6Al-4V titanium alloy Friction-stir welding Friction-stir processing Microstructure Properties

"Diseases of China" by Jefferys and Maxwell

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中华医学杂志 1918年第2期 126-128页

作者： ARTHUR sTANLEY b.s.LOND.

Pneumonic Plague has again come dramatically into the picture in China. The expiring epidemic in shansi and contiguous provinces is reported to have appeared towards the end of November, 1917, somewhere in the neighborhood of Patsebolong in south Mongolia, in the vicinity of the Yellow River, whence it extended to Paotu and saratsi in December, where it entered the province of shansi, reaching the important trading center of Kweihwa by the end of the year. From Paotu it spread south

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A Generalized Correlation for Characterization of Lubricating base-oils from Their Viscosities

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Chinese Journal of Chemical Engineering 2010年第4期18卷 642-647页

作者： A.H.Mehrkesh s.Hajimirzaee M.s.Hatamipour Islamic Azad University Majlesi BranchIsfahanIran Gas Processing & Transmission Engineering Department Petroleum University of TechnologyAhwazIran Chemical Engineering Department University of IsfahanIsfahanIran

Lubricating mineral base oils are normally extracted from lube-oil cuts with furfural *** content in the raffinate phase from extraction process is an essential parameter that affects the quality of the lubricating *** determination of aromatic content by the usual AsTM D3238 method,density,refractive index and molecular weight of the raffinate are *** this work,a new generalized correlation is developed for de-termination the aromatic content by using only the measured viscosity of lubricating *** a mole fraction of aromatic compounds,the kinematic viscosity may be obtained at any temperature between 60-100°C along with their molecular weight and refractive index.

关键词：润滑油基础油广义相关表征黏度芳烃含量芳香族化合物润滑基础油润滑油粘度

Analysing the combined effect of crystallographic orientation and grain refinement on mechanical properties and corrosion behaviour of ECAPed ZE41 Mg alloy

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Journal of Magnesium and Alloys 2020年第4期8卷 1128-1143页

作者： s.Prithivirajan s.Narendranath Vijay Desai Corrosion Engineering Lab Department of Mechanical EngineeringNational Institute of Technology KarnatakaSurcithkalSrinivasanagarMangalore 575025KarnatakaIndia

Two step equal channel angular pressing carried out on as cast ZE41 Mg alloy resulted in a remarkable grain *** compared to grain size of 46p.m in as cast sample,refinement upto 2.5^01 was achieved after 8th pass equal channel angular pressing(ECAP).The combined effect of crystallographic orientation and grain refinement was investigated by analysing the mechanical properties and corrosion behaviour of ZE41 Mg alloy using electron back scattered diffraction(EbsD).The first stage comprises of 1st,2nd,3rd and 4th passes at a processing temperature of 300℃while the 5th,6th,7th and 8th passes were ECAPed at 275℃in second *** mechanical properties of ZE41 Mg 158 yield tensile strength(YTs),230 ultimate tensile strength(UTs)and 7%elongation in as cast condition is enhanced to 236 YTs,295 UTs and 19.76%,respectively,after first stage *** yield tensile strength deteriorated due to the effect of texture predominating grain refinement during the second stage *** corrosion resistance of ZE41 Mg was significantly enhanced by ECAP and is inferred from electrochemical impedance spectroscopy(EIs)and potentiodynamic polarisation *** role of microstructure was minimal on corrosion behaviour of ZE41 Mg due to extra resistance when tested in 0M ***,the influence of grain refinement greatly influenced the improvement in corrosion resistance of ZE4I Mg rather than crystallographic orientation observed from *** contrast,the crystallographic orientation predominated the effect of grain refinement during ZE41 Mg corrosion in chloride containing(0.1 M and 1 M NaCl)*** the observation of results it is found that equal channel angular pressing has the dual advantage of improving mechanical properties and corrosion resista nee of ZE41 Mg alloy.

关键词： Corrosion EbsD Equal channel angular pressing Magnesium alloy

Type 2 diabetes and thyroid cancer:synergized risk with rising air pollution

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World Journal of Diabetes 2023年第7期14卷 1037-1048页

作者： Eva M Kruger shaimaa A shehata Eman A Toraih Ahmed A Abdelghany Manal s Fawzy school of Medicine Tulane UniversityNew OrleansLA 70112United States Department of Forensic Medicine and Clinical Toxicology Faculty of MedicineSuez Canal UniversityIsmailia 41522Egypt Division of Endocrine and Oncologic surgery Department of SurgerySchool of MedicineTulane UniversityNew OrleansLA 70112United States Genetics Unit Department of Histology and Cell BiologyFaculty of MedicineSuez Canal UniversityIsmailia 41522Egypt Department of Ophthalmology Faculty of MedicineSuez Canal UniversityIsmailia 41522Egypt Department of Medical biochemistry and Molecular biology Faculty of MedicineSuez Canal UniversityIsmailia 41522Egypt Department of biochemistry Faculty of MedicineNorthern Border UniversityArar 1321Saudi Arabia

Diabetes is a complex condition,and the causes are still not fully ***,a growing body of evidence suggests that exposure to air pollution could be linked to an increased risk of ***,exposure to certain pollutants,such as particulate Matter and Ozone,has been associated with higher rates of *** the same time,air pollution has also been linked to an increased risk of thyroid *** there is less evidence linking air pollution to thyroid cancer than to diabetes,it is clear that air pollution could have severe implications for thyroid *** pollution could increase the risk of diabetes and thyroid cancer through several *** example,air pollution could increase inflammation in the body,which is linked to an increased risk of diabetes and thyroid *** pollution could also increase oxidative stress,which is linked to an increased risk of diabetes and thyroid ***,air pollution could increase the risk of diabetes and thyroid cancer by affecting the endocrine *** review explores the link between diabetes and air pollution on thyroid *** will discuss the evidence for an association between air pollution exposure and diabetes and thyroid cancer,as well as the potential implications of air pollution for thyroid *** the connections between diabetes,air pollution,and thyroid cancer,it is essential to take preventive measures to reduce the risk of developing the condition.

关键词： Air pollution Diabetes mellitus Health risk Thyroid cancer Thyroid disorders

An investigation into flow mode transition and pressure fluctuations for fluidized dense-phase pneumatic conveying of fine powders

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Particuology 2014年第5期12卷 187-195页

作者： A.Mittal s.s.Mallick P.W.Wypych Department of Mechanical Engineering Thapar UniversityPatialaPunjab 147004India Faculty of Engineering and Information sciences University of WollongongWollongongNSW 2500Australia

This paper presents the results of an ongoing investigation into the fluctuations of pressure signals due to solids-gas flows for dense-phase pneumatic conveying of fine powders. Pressure signals were obtained from pressure transducers installed along different locations of a pipeline for the fluidized dense-phase pneumatic conveying of fly ash （median particle diameter 30μm; particle density 2300 kg/m^3; loose- poured bulk density 700 kg/m^3） and white powder （median particle diameter 55 p.m; particle density 1600 kg/m^3 ; loose-poured bulk density 620 kg/m^3） from dilute to fluidized dense-phase. standard deviation and shannon entropy were employed to investigate the pressure signal fluctuations. It was found that there is an increase in the values of shannon entropy and standard deviation for both of the prod- ucts along the flow direction through the straight pipe sections. However, both the shannon entropy and standard deviation values tend to decrease after the flow through bend（s）, This result could be attributed to the deceleration of particles while flowing through the bends, resulting in dampened particle fluctua- tion and turbulence. Lower values of shannon entropy in the early parts of the pipeline could be due to the non-suspension nature of flow （dense-phase）, i.e., there is a higher probability that the particles are concentrated toward the bottom of pipe, compared with dilute-phase or suspension flow （high velocity）, where the particles could be expected to be distributed homogenously throughout the pipe bore （as the flow is in suspension）. Changes in straight-pipe pneumatic conveying characteristics along the flow direction also indicate a change in the flow regime along the flow.

关键词： Fluidized dense-phase Pneumatic conveying Fine powders shannon entropy Flow transition Particle turbulence

应用分形分析对灌注MRI预测前列腺癌分级进行回顾性原理求证研究

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国际医学放射学杂志 2022年第4期 489-490页

作者： F.Michallek H.Huisman b.Hamm s.Elezkurtaj A.Maxeiner M.Dewey 王天达

摘要目的多模态MRI诊断前列腺癌具有高度准确性，但对于其无创预测分级能力仍存在争议。研究血管解剖分形性、显示肿瘤血流灌注特点可能有助于阐明肿瘤侵袭潜

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specific heat of a PIN-PMN-PT single-crystal up to 500 K

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Journal of Advanced Dielectrics 2017年第5期7卷 32-35页

作者： s.Grabovsky I.shnaidshtein J.Przeslawski Zhenrong Li Zhuo Xu b.strukov Faculty of Physics Lomonosov Moscow State University Moscow 119991Russia Institute of Experimental Physics Wroclaw University 50-204 WroclawPoland Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education and International Center for Dielectric Research Xi'an Jiao tong University Xi'an 710049P.R.China

The temperature dependence of the specific heat of the single crystal Pb(In_(0.5)Nb_(0.5))O_(3)-Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)(PIN-PMN-PT)was obtained at 80–500 K by means of ac-calorimetry,and comparison with the calorimetric data for PMN was made,allowing one to determine absolute values of the specific heat of *** the high-temperature region(T>200 K),the background heat capacity was calculated,the anomalies of the heat capacity for both compounds were determined,and the hump of the temperature dependence of specific heat PIN-PMN-PT was detected for the first time.

关键词： Ferroelectricity perovskites specific heat relaxors

Graphene-confined ultrafast radiant heating for high-loading subnanometer metal cluster catalysts

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National science Review 2023年第6期10卷 191-199页

作者： Ye-Chuang Han Jun Yi beibei Pang Ning Wang Xu-Cheng Li Tao Yao Kostya s.Novoselov Zhong-Qun Tian state Key Laboratory of Physical Chemistry of solid surfaces College of Chemistry and Chemical Engineering Graphene Industry and Engineering Research Institute School of Electronic Science and Engineering Xiamen University Innovation Laboratory for sciences and Technologies of Energy Materials of Fujian Province (IKKEM) National synchrotron Radiation Laboratory University of Science and Technology of China Faculty of Environment and Life Beijing University of Technology Institute for Functional Intelligent Materials National University of Singapore

Thermally activated ultrafast diffusion,collision and combination of metal atoms comprise the fundamental processes of synthesizing burgeoning subnanometer metal clusters for diverse ***,so far,no method has allowed the kinetically controllable synthesis of subnanometer metal clusters without compromising metal ***,we have developed,for the first time,a graphene-confined ultrafast radiant heating(GCURH) method for the synthesis of high-loading metal cluster catalysts in microseconds,where the impermeable and flexible graphene acts as a diffusion-constrained nanoreactor for high-temperature *** from graphene-mediated ultrafast and efficient laser-to-thermal conversion,the GCURH method is capable of providing a record-high heating and cooling rate of～109℃/s and a peak temperature above 2000 ℃,and the diffusion of thermally activated atoms is spatially limited within the confinement of the graphene *** a result,due to the kinetics-dominant and diffusion-constrained condition provided by GCURH,subnanometer Co cluster catalysts with high metal loading up to 27.1 wt% have been synthesized by pyrolyzing a Co-based metal-organic framework(MOF)in microseconds,representing one of the highest size-loading combinations and the quickest rate for MOF pyrolysis in the reported *** obtained Co cluster catalyst not only exhibits an extraordinary activity similar to that of most modern multicomponent noble metal counterparts in the electro catalytic oxygen evolution reaction,but is also highly convenient for catalyst recycling and refining due to its single metal *** a novel GCURH technique paves the way for the kinetically regulated,limited diffusion distance of thermally activated atoms,which in turn provides enormous opportunities for the development of sophisticated and environmentally sustainable metal cluster catalysts.

关键词： photothermal conversion ultrafast radiant heating graphene-confined high-loading metal clusters solid catalysts