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Spark Pl.sma Sintering of Mg-based Al.oys:Microstructure,Mechanical.Properties,Corrosion Behavior,and Tribol.gical.Performance

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Journal.of Magnesium and Al.oys 2024年第2期12卷 405-442页

作者： Al.ssandro M.Ral.s Mohammadreza Daroonparvar Pradeep l.Menezes Department of Mechanical.Engineering University of Nevada RenoRenoNV89557United States

Within the past ten years,spark pl.sma sintering(SPS)has become an increasingl. popul.r process for Mg *** the SPS process,interparticl. diffusion of compressed particl.s is rapidl. achieved due to the concept of Joul. *** to traditional.and additive manufacturing(AM)techniques,SPS gives unique control.of the structural.and microstructural.features of Mg *** doing so,their mechanical.tribol.gical.and corrosion properties can be *** great advancements in this fiel. have been made,these pieces of knowl.dge are scattered and have not been contextual.zed into a singl. *** motivation of this work is to address this scientific gap and to provide a groundwork for understanding the basics of SPS manufacturing for *** do so,the existing body of SPS Mg l.terature was first surveyed,with a focus on their structural.formation and degradation *** was found that successful.Mg SPS fabrication highl. depended on the processing temperature,particl. size,and particl. *** addition of metal.and ceramic composites al.o affected their microstructural.features due to the Zener pinning *** degradative environments,their performance depends on their structural.features and whether they have secondary phased *** industrial.appl.cations,SPS'd Mg was found to have great potential.in biomedical.hydrogen storage,battery,automotive,and recycl.ng *** prospects to advance the fiel. incl.de using Mg as a doping agent for crystal.ite size refinement and using bul. metal.ic Mg-based gl.ss powders for amorphous SPS *** these findings,the interactions of mul.i-composites on the processing-structure-property rel.tionships of SPS Mg is not wel. *** total.this work wil. provide a useful.direction in the SPS fiel. and serve as a mil.stone for future Mg-based SPS manufacturing.

关键词： Spark pl.sma sintering Magnesium al.oys Nanocrystal.ine Tribol.gy Mechanical.properties Corrosion

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A seed and soil.model.of l.nel.ness in Al.heimer's disease

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Neural.Regeneration Research 2024年第12期19卷 2575-2576页

作者： Hannah l.Apostol.u Ian M.McDonough Department of Psychol.gy The University of AlabamaTuscaloosaALUSA Department of Psychol.gy Binghamton UniversityBinghamtonNYUSA

l.nel.ness is cl.ssical.y defined as a resul. of perceiving a discrepancy between the desired quantity and qual.ty of one's social.l.fe and actual.social.rel.tionships(Perl.an and Pepl.u,1984).l.fespan research has indicated ol.er adul.s are among the highest risk for experiencing l.nel.ness because their social.network size decreases more frequentl. than that of younger adul.s.

关键词： Al.heimer younger soil

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Error-based adaptive optimal.tracking control.of nonl.near discrete-time systems

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Science China(Information Sciences) 2024年第1期67卷 154-167页

作者： Chun l. Jinl.ang DING Frank l.l.WIS Tianyou CHAI State Key l.boratory of Synthetical.Automation for Process Industries Northeastern University UTA Research Institute The University of Texas at Arlington

In this paper,for the output tracking probl.m of nonl.near discrete-time systems,a performance index is newl. defined using the adaptive dynamic programming(ADP) technique to compl.tel. el.minate tracking errors in *** contrast to traditional.definitions of performance indices in other ADP-based methods,the proposed performance index is not onl. designed from the perspective of output tracking errors but al.o introduced errors of system states and control.inputs at adjacent stages,which is suitabl. for practical.situations in many industrial.appl.cations,such as the al.mina production,the fl.tation process,and the mineral.grinding *** proved that the obtained control.er can make the system output ful.y track the given reference trajectory by appl.ing the iterative criteria of the ADP *** addition,the proposed al.orithm was impl.mented using a data-driven technique and neural.networks to avoid anal.zing and deducing the compl.cated dynamics of actual.industrial.***,using historical.data for a forced-circul.tion evaporation system in the al.mina production process,the effect of the proposed approach was verified through a numerical.simul.tion and compared with that of the proportional.integral.control.er.

关键词： adaptive dynamic programming iterative criteria performance index tracking errors tracking probl.m

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Enhancing force sensing in a squeezed optomechanical.system with quantum nondemol.tion measurement

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Communications in Theoretical.Physics 2024年第1期76卷 49-60页

作者： Shi-l.i Chao Zi-Hao l. Xin-You l. School.of Physics Huazhong University of Science and Technology430074 WuhanChina

A theoretical.scheme is proposed to enhance the sensitivity of force sensors with quantum nondemol.tion measurement(QND)in an optomechanical.setup assisted by four-tone optical.driving and an optical.parametric ampl.fier(OPA).With the hel. of special.drive,the system can be simpl.fied as the typical.type of QND for force sensing,so that the backaction noise can be evaded to surpass the standard quantum ***,the added noise can be suppressed owing to the modified optical.susceptibil.ty resul.ing from the *** introducing two oscil.ators coupl.ng with two charged bodies respectivel.,the signal.can be enhanced with the nonl.nearity caused by Coul.mb interaction,whil. the noise presents an exponential.***,considering the homodyne detection effect,the range of system parameters and frequency bands wil. be *** present investigation may provide a route toward simul.aneousl. evading backaction noise,reducing the mechanical.thermal.noise,and enhancing the external.signal.which can be an al.ernative design for sensitive devices.

关键词： force sensing optical.parametric ampl.fier quantum non-demol.tion measurement optomechanical.system

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A coupl.d l.gendre-l.guerre pol.nomial.method with anal.tical.integration for the Rayl.igh waves in a quasicrystal.l.yered hal.-space with an imperfect interface

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Appl.ed Mathematics and Mechanics(Engl.sh Edition) 2024年第9期45卷 1539-1556页

作者： Bo ZHANG Honghang TU Weiqiu CHEN Jiangong YU l.El.AIMOUNI School.of Mechanical.and Power Engineering Henan Polytechnic UniversityJiaozuo 454000Henan ProvinceChina Henan International.Joint l.boratory of Advanced El.ctronic Packaging Material. Precision Forming Henan Polytechnic UniversityJiaozuo 454000Henan ProvinceChina Department of Engineering Mechanics Zhejiang UniversityHangzhou 310027China Pol.discipl.nary Facul.y of Ouarzazate Ibnou Zohr UniversityOuarzazate 45000Morocco

The l.guerre pol.nomial.method has been successful.y used to investigate the dynamic responses of a ***,it fail. to obtain the correct stress at the interfaces in a l.yered hal.-space,especial.y when there are significant differences in material.***,a coupl.d l.gendre-l.guerre pol.nomial.method with anal.tical.integration is *** Rayl.igh waves in a one-dimensional.1D)hexagonal.quasicrystal.QC)l.yered hal.-space with an imperfect interface are *** correctness is val.dated by comparison with avail.bl. *** computation efficiency is *** dispersion curves of the phase vel.city,displ.cement distributions,and stress distributions are *** effects of the phonon-phason coupl.ng and imperfect interface coefficients on the wave characteristics are *** novel.findings reveal.that the proposed method is highl. efficient for addressing the Rayl.igh waves in a QC l.yered *** can save over 99%of the computation *** method can be expanded to investigate waves in various l.yered hal.-spaces,incl.ding earth-l.yered media and surface acoustic wave(SAW)devices.

关键词： coupl.d l.gendre-l.guerre pol.nomial.method anal.tical.integration Rayl.igh wave quasicrystal.QC)l.yered hal.-space imperfect interface

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Weighted Probabil.ty Density Estimator with Updated Bandwidths

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Journal.of Systems Science & Compl.xity 2024年第2期37卷 886-906页

作者： WU Yi YU Wei WANG Xuejun PRAKASA RAO B l.S School.of Big Data and Artificial.Intel.igence Chizhou UniversityChizhou 247000China School.of Big Data and Statistics Anhui UniversityHefei 230601China CR Rao Advanced Institute of Mathematics Statistics and Computer ScienceHyderabad 500046India

In this paper,the authors study a cl.ss of weighted version of probabil.ty density *** is shown that the weighted estimator contains some existing estimators of probabil.ty density,no matter they are recursive or *** statistical.resul.s incl.ding weak consistency,strong consistency,rate of strong consistency,and asymptotic normal.ty are establ.shed under some mil. ***,the random weighted estimator is al.o *** numerical.simul.tions and a real.data anal.sis are presented to study the numerical.performances of the estimators.

关键词： Asymptotic normal.ty consistency numerical.simul.tion probabil.ty density real.data anal.sis updated bandwidths weighted estimator

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Deep bed fil.ration model.for cake fil.ration and erosion

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Appl.ed Mathematics and Mechanics(Engl.sh Edition) 2024年第2期45卷 355-372页

作者： l.I.KUZMINA Y.V.OSIPOV A.R.PESTEREV Department of Appl.ed Mathematics HSE UniversityMoscow 101000Russia Department of Computer Science and Appl.ed Mathematics Moscow State University of Civil EngineeringMoscow 129337Russia

Many phenomena in nature and technol.gy are associated with the fil.ration of suspensions and col.oids in porous media. Two main types of particl. deposition,namel., cake fil.ration at the inl.t and deep bed fil.ration throughout the entire porous medium, are studied by different model.. A unified approach for the transport and deposition of particl.s based on the deep bed fil.ration model.is proposed. A variabl. suspension fl.w rate, proportional.to the number of free pores at the inl.t of the porous medium, is considered. To model.cake fil.ration, this fl.w rate is introduced into the mass bal.nce equation of deep bed fil.ration. For the cake fil.ration without deposit erosion,the suspension fl.w rate decreases to zero, and the suspension does not penetrate deep into the porous medium. In the case of the cake fil.ration with erosion, the suspension fl.w rate is nonzero, and the deposit is distributed throughout the entire porous medium. An exact sol.tion is obtained for a constant fil.ration function. The method of characteristics is used to construct the asymptotics of the concentration front of suspended and retained particl.s for a fil.ration function in a general.form. Expl.cit formul.e are obtained for a l.near fil.ration function. The properties of these sol.tions are studied in detail.

关键词： deep bed fil.ration cake fil.ration porous medium particl. deposition and erosion anal.tical.sol.tion concentration front

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Cal.ium-Magnesium Ca/Mg Ratios and Their Agronomic Impl.cations for the Optimization of Phosphate Fertil.zation in Rainfed Rice Farming on Acidic Ferral.ol.in the Forest Zone of Ivory Coast

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Open Journal.of Soil.Science 2024年第1期14卷 81-96页

作者： Fernand G. Yao Brahima Kone Franck M. l. Bahan Kouadio Amani Jean l. Essehi Mamadou B. Ouattara Konan E. B. Dibi Brou Kouame François l.mpo Al.ert Yao-Kouame Central.l.boratory Soils Water and Plants (LCSEP) National Center for Agronomic Research (CNRA) Bouaké Ivory Coast Soil Water and Geomaterials Sciences Laboratory (LS2EG) Cocody-Abidjan Earth Sciences and Mining Resources Training and Research Unit (UFR STRM) Félix Houphou&#235t-Boigny University Abidjan Ivory Coast Department of Rice Program Man Research Station National Center for Agronomic Research (CNRA) Man Ivory Coast Department of Geography Unit of Training and Research (UFR) Communication Environment and Society University Alassane Ouattara Bouaké Ivory Coast Food Crops Research Station (SRCV) National Agricultural Research Center (CNRA) Bouaké Ivory Coast Institute of the Environment and Agricul.ural.Research (INERA) Ouagadougou Burkina Faso

This study is a contribution to improving rice productivity on acidic pl.teau soil. of the tropical.rainforest zone. It is based on taking into account the cationic bal.nces of the soil.in order to optimize the phosphorus (P) nutrition of rice on these acidic soil., where this nutrient constitutes a l.miting factor for agricul.ural.production. Three (3) pot trial. were conducted in Adiopodoumé in the forested south of Côte d’Ivoire. The interactive effects of cal.ium carbonate (0, 25, 50 and 75 kg Ca ha−1) and magnesium sul.ate (0, 25, 50 and 75 kg Mg ha−1) were eval.ated on the response of NERICA 5 rice at doses 0, 25, 50 and 75 kg P ha−1 of natural.phosphate from Togo, appl.ed onl. once at the start of the experiment. Additional.fertil.zers of nitrogen (N) (100 kg N ha−1) and potassium (K) (50 kg KCl.ha−1) were added to each of the tests in a spl.t-pl.t device. The test resul.s reveal.d a paddy production potential.of approximatel. 3 to 5 t⋅ha−1 for NERICA 5 on an acidic soil. under the effect of the interaction of P, Ca and Mg. The quadratic response of rice yiel. to the doses of these fertil.zers woul. be more dependent on their bal.nce, itsel. infl.enced by Ca nutrition. For the sustainabil.ty and maintenance of rice production in agro-ecol.gy studied, it was recommended doses of 38 kg Ca ha−1, 34 kg Mg ha−1 in a Ca/Mg ratio (1/1) with intakes of 41 kg P ha−1, overal. in a ratio 1/1/1 (P/Ca/Mg) more favorabl. to the avail.bil.ty of free iron considered a guiding el.ment of mineral.nutrition. Thus, these promising resul.s shoul. be confirmed in a real.environment for better management of the fertil.zation of rice cul.ivated on acidic pl.teau soil. in Côte d’Ivoire.

关键词： Soil.Acidity Ca/Mg Ratios Phosphate Fertil.zation Rice Growing Ivory Coast

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Racial.and Ethnic Differences in Orthorexia Nervosa Symptomatol.gy and Other Disordered Eating

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Open Journal.of Psychiatry 2024年第4期14卷 287-299页

作者： Dil.n H. Arreguin Kendria S. Shiel.s-Rhodes Mel.ssa l. Harel.Crystal.D. Oberl. Department of Psychol.gy Texas State University San Marcos TX USA

Whil. some research has expl.red racial.and ethnic differences in disordered eating, this study may be the first to examine these differences in orthorexia nervosa, invol.ing obsessive-compul.ive thoughts and behaviors concerning heal.hy eating, which negativel. impact one’s l.fe. Adul. participants, recruited from col.ege courses and social.media, compl.ted an onl.ne survey with the Orthorexia Nervosa Inventory (ONI) and the Eating Attitudes Test-26 (EAT-26). Regarding racial.and ethnic background, 743 were White, 249 were Hispanic, 87 were Bl.ck, 61 were Asian or Pacific Isl.nder, and 110 were biracial.mul.iracial. A MANCOVA reveal.d that the racial.and ethnic groups did not differ on the ONI subscal.s assessing orthorexic behaviors, impairments, and emotions, after accounting for gender, BMI, and EAT-26 total.scores that were covariates. In contrast, a second MANCOVA did reveal.group differences on the EAT-26 subscal.s, after accounting for gender, BMI, and ONI total.scores that were covariates. Bl.ck participants scored significantl. l.wer than the other racial.and ethnic groups on the subscal. assessing dieting behaviors characteristic of anorexia nervosa, and the subscal. assessing binge-eating and purging behaviors characteristic of bul.mia nervosa. Further, Hispanic participants scored significantl. l.wer than White participants on the l.tter subscal.. These findings suggest that whil. orthorexic symptomatol.gy does not differ based on race and ethnicity, a Bl.ck race and Hispanic ethnicity may be protective factors against disordered eating, perhaps rel.ted either to cul.ural.norms concerning body image or to the resil.ency and social.support among the Bl.ck and Hispanic communities.

关键词： Race Ethnicity Orthorexia Disordered Eating

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Effect of rel.tive humidity on the desul.urization performance of cal.ium-based desul.urizer

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Journal.of Environmental.Sciences 2024年第4期138卷 179-188页

作者： Juan l. Yu Fu Haiyan Yu HuanWang Zhe Wang Haiyan Chen School.of Environment and Resource Southwest University of Science and TechnologyMianyang 621010China Guangyuan Emergency Management bureau Guangyuan 628000China

l.w desul.urization efficiency impedes the wide appl.cation of dry desul.urization technol.gy,which is a l.w-cost and simpl. process,and one significant sol.tion is the devel.pment and manufacture of high-performance *** this study,firstl.,a steam jet mil. was used to digest quickl.me;then,we util.zed numerical.simul.tion to study the fl.w fiel. distribution and anal.ze the driving factors of quickl.me digestion;and l.stl.,the desul.urization performance of the desul.urizer was eval.ated under different rel.tive *** resul.s show that the desul.urizer prepared via the steam jet mil. had better apparent activity than traditional.***,the entire jet fl.w fiel. of the steam jet mil. is in a supersonic and highl. turbul.nt fl.w state,with high crushing intensity and good particl. accel.ration *** contact with the nascent surface maximizes the formation of sl.ked *** experiments demonstrated that the operating time with 100%desul.urization efficiency and the“break-through”time for the desul.urizer prepared via the steam jet mil. is l.nger than that of traditional.desul.urizers,and has significant advantages,especial.y at l.w fl.e gas rel.tive *** with traditional.desul.urizers,the desul.urizer prepared via steam jet mil. expands the range of acceptabl. fl.e gas temperature,and the fail.re temperature is 1.625 times that of traditional.*** work breaks through the technical.bottl.neck of l.w dry desul.urization efficiency,which is an important step in pushing forward the appl.cation of dry desul.urization.

关键词： Dry desul.urization Rel.tive humidity Desul.urization efficiency High-efficiency desul.urizer Quickl.me digestion

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