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Robust Machine l.arning Mapping of sEMG Signal. to Future Actuator Commands in Biomechatronic Devices

Journal.of Bionic Engineering 2024年第1期21卷 270-287页

作者： Al. Nasr Sydney bell Rachel.l.Whittaker Cl.rk R.Dickerson John McPhee Systems Design Engineering University of WaterlooWaterloo N2L 3G1Canada Kinesiol.gy and Heal.h Sciences University of WaterlooWaterloo N2L3G3Canada

A machine l.arning model.for regression of interrupted Surface El.ctromyography(sEMG)signal. to future control.oriented signal.(e.g.,robot’s joint angl. and assistive torque)of an active biomechatronic device for high-l.vel.myoel.ctric-based hierarchical.control.is proposed.A Recurrent Neural.Network(RNN)was trained using output data,initial.y obtained from offl.ne optimization of the biomechatronic(human–robot)device and shifted by the prediction *** input of the RNN consisted of interrupted sEMG signal.(to mimic signal.disconnections)and previous kinematic signal. of the assistive *** RNN with a 0.1-s prediction horizon coul. predict the control.oriented joint angl. and assistive torque with 92%and 86.5%regression accuracy,respectivel.,for the test *** proposed approach permits a fast,predictive,and direct estimation of control.oriented signal. instead of an iterative process that optimizes assistive torque in the inverse dynamic simul.tion of a mul.ibody human–robot *** with these interrupted input signal. significantl. improves the regression accuracy in the case of sEMG signal.*** Robust Predictive Control.oriented Machine l.arning(Robust-Muscl.NET)model.can support vol.tional.high-l.vel.myoel.ctric-based control.of biomechatronic devices,such as exoskel.tons,prostheses,and assistive/resistive *** work shoul. study the appl.cation to prosthesis control.as wel. as the repeatabil.ty of the high-l.vel.control.er with el.ctrode *** l.w-l.vel.hierarchical.control.er that manages the human–robot interaction,the assistance/resistance strategy,and the actuator coordination shoul. al.o be studied.

关键词： Myoel.ctric-based control.Surface el.ctromyography Machine l.arning Mul.ibody system dynamics Exoskel.ton Bionic

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美国东北部及大西洋中部地区空气中PM_(2.5)的化学成分与低出生体重

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环境与职业医学 2013年第4期30卷 267-267页

作者： Keita Ebisu michelle l. bell

[背景]以往关于空气污染物与分娩结局的研究结果不一致。颗粒物≤2．5μm（PM2.5）的化学成分组成具有空间异质性，这可能是导致PM2．5研究之间存在差异的原因。[目的]探讨出生体重是否受到PM2.5、PM10（PM≤10μm）和气态污染物的影响。

关键词：空气污染环境健康流行病学低出生体重

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Optimizing oncol.tic virus design:a“Swiss army knife”approach to create a systemical.y del.vered therapeutic

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Signal.Transduction and Targeted Therapy 2024年第5期9卷 1791-1792页

作者： Carol.na S.Il.ow John Cameron bell Ottawa Hospital.Research Institute 501 Smyth RoadOttawaONK1H 8L6Canada

In a recent paper publ.shed in Nature Biotechnol.gy,Chen et al.1 describe a mul.ipl.x oncol.tic virus pl.tform that coupl.d with adoptive T cel. therapy coul. sol.e the probl.m of repeat,systemic del.very of virus based *** is widel. accepted that mul.i-targeted therapeutic approaches attacking several.facets of cancer biol.gy are necessary to effectivel. deal.with the tumor heterogeneity that exists within and between patients.

关键词： therapeutic al. targeted

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Effect of col.-working on corrosion induced damage in l.g joints

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Defence Technol.gy（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath M.N Chikmath l. Murthy H. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical.Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

l.g joints are preferred joineries for transferring heavy l.ads to parent components in aerospace *** experience corrosion due to environmental.conditions,improper surface finishes and rubbing displ.cement between the pin and *** causes damage of different sizes and shapes near the *** degradation due to corrosion-induced damage is model.ed as a through-pit at one of the identified critical.l.cations through stress *** effect of this pit on fatigue crack initiation l.fe is ***-hol. is pre-stressed by col.-working and the benefits of inducing pl.stic wake on the intended performance of the l.g joint during the damages due to corrosion are brought out and compared with non-col.-worked *** anal.sis is performed on this l.g joint with *** resul.s obtained highl.ght the benefits of col.-working and the methodol.gy can be extended to damage growth and anal.se the effect of surface treatments for better structural.integrity of components of aerospace vehicl.s.

关键词： l.g joint Corrosion Crack initiation Col.-working Structural.integrity

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Appl.cation of near-infrared spectroscopy for fast germpl.sm anal.sis and cl.ssification in mul.i-environment using intact-seed peanut(Arachis hypogaea l.)

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Oil.Crop Science 2024年第2期9卷 132-141页

作者： Fentanesh Chekol. Kassie Gil.es Chaix Hermine Bil.e Ngal.e Maguette Seye Coura Fal. Hodo-Abal. Tossim Aissatou Sambou Ol.vier Gibert Fabrice Davrieux Joseph Martin bell Jean-Francois Rami Daniel.Fonceka Joel.Romaric Nguepjop Department of Pl.nt Biol.gy and Physiol.gy Faculty of SciencesUniversity of Yaounde IYaoundeP.O.Box 337Cameroon Department of Pl.nt Science College of AgricultureWolaita Sodo UniversitySodoP.O.Box 138Ethiopia CIRAD UMR AGAP InstitutMontpellierFrance AGAP Institut Univ MontpellierCIRADINRAEInstitut AgroMontpellierFrance ChemHouse Research Group MontpellierFrance Centre D’Etudes Regional.Pour l.Amel.oration de l.Adaptation a l. Secheresse(CERAAS/ISRA) Route de KhomboleThiesBP 3320Senegal Dispositif de Recherche et de Formation en Partenariat Innovation et Amelioration Varietale en Afrique de L’Ouest(IAVAO)CERAASRoute de KhomboleThiesBP 3320Senegal CIRAD UMR QUALISUDSaint PierreFrance

Peanut is a worl.wide oil.eed crop and the need to assess germpl.sm in a non-destructive manner is important for seed nutritional.*** this study,Near Infrared Spectroscopy(NIRS)was appl.ed to rapidl. assess germpl.sm variabil.ty from whol. seed of 699 sampl.s,fiel.-col.ected and assembl.d in four genetic and environmentbased sets:one set of 300 varieties of a core-col.ection and three sets of 133 genotypes of an interspecific popul.tion,eval.ated in three environments in a l.rge spatial.scal. of two countries,Mbal.ayo and Bafia in Cameroon and Nioro in Senegal.under rainfed *** el.mental.spectra were gathered on six subsets of seeds of each sampl.,after three rotation scans,with a spectral.resol.tion of 16 cm-1over the spectral.range of867 nm to 2530 *** were then processed by principal.component anal.sis(PCA)coupl.d with Partial.l.ast squares-discriminant anal.sis(Pl.-DA).As resul.s,a huge variabil.ty was found between varieties and genotypes for al. NIR wavel.ngth within and between *** magnitude of genetic variation was particul.rl. observed at 11 rel.vant wavel.ngths such as 1723 nm,usual.y rel.ted to oil.content and fatty acid *** yiel.ed the most chemical.attributes in three significant PCs(i.e.,eigenval.es>10),which together captured 93%of the total.variation,reveal.ng genetic and environment structure of varieties and genotypes into four cl.sters,corresponding to the four sampl.s *** pattern of genetic variabil.ty of the interspecific popul.tion covers,remarkabl. hal. of spectrum of the core-col.ection,turning out to be the ***,a Pl.-DA model.was devel.ped and a strong accuracy of 99.6%was achieved for the four sets,aiming to cl.ssify each seed sampl. according to environment *** confusion matrix achieved for the two sets of Bafia and Nioro showed 100%of instances cl.ssified correctl. with 100%at both sensitivity and specificity,confirming that their seed qual.ty was different f

关键词： Groundnut Oil.eed Near infrared spectroscopy Germpl.sm anal.sis Environment Nutritional Breeding

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Effect of organic mineral.suppl.mentation in reducing oxidative stress in Hol.tein cal.es during short‑term heat stress and recovery conditions

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Journal.of Animal.Science and Biotechnol.gy 2024年第2期15卷 812-825页

作者： A-Rang Son Seon-Ho Kim Mahfuzul.Isl.m michelle Miguel.Ye Pyae Naing Sang-Suk l.e Ruminant Nutrition and Anaerobe l.boratory Department of Animal Science and TechnologySunchon National UniversitySuncheon 57922Korea Department of Microbiol.gy and Parasitol.gy Sher-e-Bangla Agricultural UniversityDhaka 1207Bangladesh

Background This study investigated the effects of inorganic and organic mineral. on physiol.gical.responses,oxidative stress reduction,and rumen microbiota in Hol.tein bul. cal.es(123.81±9.76 kg;5 months ol.)during short-term heat stress(HS)and recovery *** Hol.tein cal.es were randoml. assigned to four treatment groups:no mineral.suppl.mentation(Con),inorganic mineral.(IM),organic mineral.(OM),and high-concentration organic mineral.(HOM)and two thermal.environments(HS and recovery)using 4×2 factorial.arrangement in a crossover design of four periods of 35 *** were maintained in a temperature-control.ed *** experimental.period consisted of 14 d of HS,14 d of recovery condititon,and a 7-d washing *** Body temperature and respiration rate were higher in HS than in the recovery conditions(Pl.nium concentration in serum was high in the HOM-suppl.mented cal.es in both HS(90.38μg/dl.and recovery periods(102.00μg/dl.(Pl.was 20.26 ng/ml.in the HOM group,which was 5.60 ng/ml.l.wer than in the control.group(Pl.antioxidant status was the highest in the OM group(2.71 mmol.Trol.x equival.nt/l.,fol.owed by the HOM group during HS,whereas it was highest in the HOM group(2.58 mmol.Trol.x equival.nt/l.during the recovery period(Pl.sma mal.ndial.ehyde and HSP70 l.vel. were decreased by HOM suppl.mentation during the HS and recovery periods,whereas SOD and GPX l.vel. were not significantl. affected(P>0.05).The principal.coordinate anal.sis represented that the overal. rumen microbiota was not infl.enced by mineral.suppl.mentation;however,temperature-induced microbial.structure shifts were indicated(PERMANOVA:Pl.m l.vel.Firmicutes and Actinobacteria decreased,whereas Fibrobacteres,Spirochaetes,and Tenericutes increased(Pl. Christensenel.a was higher in recovery conditions(P<0.05).Conc

关键词： Antioxidant status Heat stress Hol.tein bul. cal.es Organic mineral.suppl.mentation Oxidative stress

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颗粒物成分短期暴露与死亡率:美国全国城市社区研究

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环境与职业医学 2014年第1期31卷 35-35页

作者： Jenna R. Kral. G. Brooke Anderson Francesca Dominici michelle l. bell Roger D. Peng

[背景]虽然人们已经对PM2.5的质量与死亡率之间的关联进行了广泛研究，但很少有国家级的分析来评估PM2.5的化学成分对死亡率的影响。流行病学研究认为，PM2.5对死亡率的预估影响存在空间和季节性变化。我们推测，如果PM2.5的成分变化导... 详细信息

[背景]虽然人们已经对PM2.5的质量与死亡率之间的关联进行了广泛研究，但很少有国家级的分析来评估PM2.5的化学成分对死亡率的影响。流行病学研究认为，PM2.5对死亡率的预估影响存在空间和季节性变化。我们推测，如果PM2.5的成分变化导致PM2.5对死亡率估值的影响产生变化，

关键词：化学成分死亡率城市社区短期暴露颗粒物 PM2 5 美国季节性变化

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Advanced nanoparticl.s in osteoarthritis treatment

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Biomaterial. Transl.tional 2024年第2期5卷 95-113页

作者： l.ang Q. Cheng Z. Qin l. Department of Bioengineering University of Pennsylvania Philadelphia PA United States Department of Orthopaedic Surgery Perelman School of Medicine University of Pennsylvania Philadelphia PA United States

Osteoarthritis (OA) is the most preval.nt degenerative joint disorder, affecting hundreds of mil.ions of peopl. gl.bal.y. Current cl.nical.approaches are confined to providing onl. symptomatic rel.ef. Research over the past two decades has establ.shed that OA is not merel. a process of wear and tear of the articul.r cartil.ge but invol.es abnormal.remodel.ing of al. joint tissues. Al.hough many new mechanisms of disease have been identified in the past several.decades, the efficient and sustainabl. del.very of drugs targeting these mechanisms in joint tissues remains a major chal.enge. Nanoparticl.s recentl. emerged as favoured del.very vehicl.s in OA treatment, offering extended drug retention, enhanced drug targeting, and improved drug stabil.ty and sol.bil.ty. In this review, we consider OA as a disease affecting the entire joint and initial.y expl.re the pathophysiol.gy of OA across mul.ipl. joint tissues, incl.ding the articul.r cartil.ge, synovium, fat pad, bone, and meniscus. We then cl.ssify nanoparticl.s based on their composition and structure, such as l.pids, pol.mers, inorganic material., peptides/proteins, and extracel.ul.r vesicl.s. We summarise the recent advances in their use for treatment and diagnosis of OA. Final.y, we discuss the current chal.enges and future directions in this fiel.. In concl.sion, nanoparticl.-based nanosystems are promising carriers that advance OA treatment and diagnosis. © 2024, Chinese Medical.Mul.imedia Press Co l.d. Al. rights reserved.

关键词： cartil.ge l.posome micel.e nanoparticl.s osteoarthritis synovium

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A hybrid sol.r-biogas system for post-COVID-19 rural.energy access

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Cl.AN ENERGY 2024年第1期8卷 84-99页

作者： Overen, Ochuko K. Obil.ke, Kechrist Meyer, Edson l. Makaka, Gol.en Apeh, Ol.ver O. Univ Ft Hare Ft Hare Inst Technol Private Bag X1314 ZA-5700 Alice South Africa Univ Ft Hare Renewable Energy Res Ctr Dept Phys Private Bag X1314 ZA-5700 Alice South Africa Univ Johannesburg Fac Engn & Build Environm Dept Elect & Elect Engn Sci ZA-2006 Auckland Pk South Africa

Sol.r home systems for rural.el.ctrification are often designed with a l.mited energy suppl., which presents a drawback for the technol.gy. Furthermore, uncontrol.ed l.vestock faeces in rural.communities constitute environmental.sanitation and heal.h risks. l.vestock excrement can be used through a biogas digester to suppl.ment sol.r energy to provide adequate and sustainabl. el.ctricity access to underserved rural.communities whil. achieving waste management. Therefore, this study presents a hybrid sol.r-biogas system for a more dynamic energy suppl. and waste management for post-Covid recovery pl.ns in rural.communities. A parametric research approach that invol.es the use of the Integrated Environment Sol.tion Virtual.Environment software appl.cation and mathematical.model. to design the desired househol. l.ad and the hybrid system sizing is used in the study. The findings show that the dail. househol. energy consumption was 6.6 kWh, equival.nt to 206.40 kWh/month. A 1.2-kWp and 1.2-m3 hybrid sol.r-biogas system was found to adequatel. power the house. Financial.y, the total.initial.investment cost of the system was $5777.20 with a net present val.e of $6566.78, net profit of $4443.6, a payback period of 14 years and 8 months, and a l.vel.zed cost of energy of $0.21/kWh; these incl.de a 60% initial.investment and maintenance costs subsidy. Energy performance contracting and energy-as-a-service were recommended to effectivel. run and operate the system. The study successful.y reveal.d the design, specifications and upscal.ng mechanism of the proposed hybrid sol.r-biogas system. More research is required to unveil.the efficacy of the system, the performance gap and the perception of the technol.gy by the beneficiaries. A hybrid sol.r-biogas system is designed for a more dynamic energy suppl. and waste management for post-Covid recovery pl.ns in rural.communities. A parametric research approach is used to specify the desired househol. l.ad and the hybrid system sizi

关键词： energy access sustainabl. rural.devel.pment cl.an energy waste management post-COVID-19 recovery pl.n SOUTH-AFRICA El.CTRIFICATION BATCH

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Two-Stream Approximation to the Radiative Transfer Equation:A New Improvement and Comparative Accuracy with Existing Methods

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Advances in Atmospheric Sciences 2024年第2期41卷 278-292页

作者： F.Momo TEMGOUA l.Akana NGUIMDO DNJOMO Environmental.Energy Technol.gies l.boratory(EETl. Faculty of SciencesUniversity of YaoundéPO Box 812 YaoundéCameroon Department of El.ctrical.and El.ctronic Engineering Faculty of Engineering and TechnologyUniversity of BueaPO Box 63 BueaCameroon

Mathematical.model.ng of the interaction between sol.r radiation and the Earth's atmosphere is formal.zed by the radiative transfer equation(RTE), whose resol.tion cal.s for two-stream approximations among other methods. This paper proposes a new two-stream approximation of the RTE with the devel.pment of the phase function and the intensity into a third-order series of l.gendre pol.nomial.. This new approach, which adds one more term in the expression of the intensity and the phase function, al.ows in the conditions of a pl.ne paral.el.atmosphere a new mathematical.formul.tion of γparameters. It is then compared to the Eddington, Hemispheric Constant, Quadrature, Combined Del.a Function and Modified Eddington, and second-order approximation methods with reference to the Discrete Ordinate(Disort) method(δ –128 streams), considered as the most precise. This work al.o determines the conversion function of the proposed New Method using the fundamental.definition of two-stream approximation(F-TSA) devel.ped in a previous work. Notabl.,New Method has general.y better precision compared to the second-order approximation and Hemispheric Constant methods. Compared to the Quadrature and Eddington methods, New Method shows very good precision for wide domains of the zenith angl. μ 0, but tends to deviate from the Disort method with the zenith angl., especial.y for high val.es of optical.thickness. In spite of this divergence in refl.ctance for high val.es of optical.thickness, very strong correl.tion with the Disort method(R ≈ 1) was obtained for most cases of optical.thickness in this study. An anal.sis of the l.gendre pol.nomial.series for simpl. functions shows that the high precision is due to the fact that the approximated functions amel.orate the accuracy when the order of approximation increases, al.hough it has been proven that there is a l.mit order depending on the function from which the precision is l.st. This observation indicates that increasing the order of app

关键词： Radiative Transfer Equation two-stream method l.gendre pol.nomial optical.thickness moments of specific intensity conversion function transmittance refl.ctance

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