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Statistical analysis to establish an ignition scenario based on extrinsic and intrinsic variables of coal seams that affect spontaneous combustion

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International Journal of Mining Science and Technology 2019年第5期29卷 731-737页

作者： M.O.Bustamante Rúa A.J.Daza Aragón P.Bustamante Baena J.D.osorio Botero school mines national university of colombiamedellín 050036colombia

Spontaneous combustion of coal seams in open pit mines is a problem that occurs in coal mines around the *** have been developed that express several factors which generate self-heating in the coal and favor *** synergy of these factors contributes to the increase in the temperature of oxidation reactions,facilitating the culmination of the activation energy of the system,in which the ignition develops and the reaction is ***,the incidence of each variable’s susceptibility to coal combustion is unknown,so in this work a methodology was developed to determine statistically which of the variables has the greatest contribution in the *** statistics,atypical values detection,principal component determination,cluster analysis,and logistic regression were used to determine how many indicator variables are necessary to describe susceptibility to coal *** the analysis,21,000 data from different seams of two open-pit coal mines in endwalls and abandoned pits were processed with consideration given to extrinsic and intrinsic *** temperature,atmospheric pressure,wind speed,oxygen,methane,height,ash,volatile matter,heat power,vitrinite,liptinite and the Hardgrove Index are the most influential variables in the phenomenon.

关键词： Coal fire Self-ignition Statistics analysis Open pit mines Spontaneous combustion

A Long-Range Generalized Predictive Control Algorithm for a DFIG Based Wind Energy System

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IEEE/CAA Journal of Automatica Sinica 2019年第5期6卷 1209-1219页

作者： J.S.Solis-Chaves Lucas L.Rodrigues C.M.Rocha-osorio Alfeu J.Sguarezi Filho the Department of Energy Engineering at the Federal University of ABC-UFABC Santo AndreSPBrazil

This paper presents a new Long-range generalized predictive controller in the synchronous reference frame for a wind energy system doubly-fed induction generator based. This controller uses the state space equations that consider the rotor current and voltage as state and control variables, to execute the predictive control action. Therefore, the model of the plant must be transformed into two discrete transference functions, by means of an auto-regressive moving average model, in order to attain a discrete and decoupled controller, which makes it possible to treat it as two independent single-input single-output systems instead of a magnetic coupled multiple-input multiple-output system. For achieving that, a direct power control strategy is used, based on the past and future rotor currents and voltages estimation. The algorithm evaluates the rotor current predictors for a defined prediction horizon and computes the new rotor voltages that must be injected to controlling the stator active and reactive powers. To evaluate the controller performance, some simulations were made using Matlab/Simulink. Experimental tests were carried out with a small-scale prototype assuming normal operating conditions with constant and variable wind speed profiles. Finally, some conclusions respect to the dynamic performance of this new controller are summarized.

关键词： Direct power control doubly-fed induction generator flux oriented control generalized predictive control long-range predictive control wind energy systems

Peripartal rumen-protected methionine supplementation to higher energy diets elicits positive effects on blood neutrophil gene networks, performance and liver lipid content in dairy cows

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Journal of Animal Science and Biotechnology 2016年第3期7卷 391-402页

作者： Cong Li Fernanda Batistel Johan Samir osorio James K.Drackley Daniel Luchini Juan J.Loor Key Laboratory of Animal Genetics and Breeding of Ministry of Agriculture National Engineering Laboratory of Animal BreedingCollege of Animal Science and TechnologyChina Agricultural University Department of Animal Sciences and Division of Nutritional Sciences University of Illinois Department of Animal and Rangeland Sciences Oregon State University Ruminant Technical Services ADISSEO NA

Background： Main objectives were to determine to what extent Smartamine M（SM） supplementation to a prepartal higher-energy diet could alter neutrophil（PMN） and liver tissue immunometabolic biomarkers, and whether those responses were comparable to those in cows fed a prepartal lower-energy diet（CON）.Results： Twenty-eight multiparous Holstein cows were fed CON（NEL= 1.24 Mcal/kg DM） during d-50 to d-22 relative to calving. From d-21 to calving, cows were randomly assigned to a higher-energy diet（OVE, n = 9; NEL= 1.54 Mcal/kg DM）, OVE plus SM（OVE ＋ SM, n = 10; SM = 0.07 % of DM） or remained on CON（n = 9）. Al cows received the same basal lactation diet（NEL= 1.75 Mcal/kg DM）. Supplementation of SM（OVE ＋ SM） continued until 30 d postpartum. Liver biopsies were harvested at d-10, 7, and 21 relative to parturition. Blood PMN isolated at-10, 3, and 21 d relative to calving was used to evaluate gene expression. As expected, OVE increased liver lipid content postpartum; however,cows fed OVE ＋ SM or CON had lower concentrations than OVE. Compared with OVE, cows in CON and OVE ＋ SM had greater DMI postpartum and milk production. Furthermore, cows fed OVE ＋ SM had the greatest milk protein and fat percentage and lowest milk SCC despite having intermediate PMN phagocytic capacity. Adaptations in PMN gene expression in OVE ＋ SM cows associated with the lower SCC were gradual increases from-10 to 21 d in genes that facilitate migration into inflammatory sites（SELL, ITGAM）, enzymes essential for reducing reactive oxygen metabolites（SOD1, SOD2）, and a transcription factor（s） required for controlling PMN development（RXRA）. The greater expression of TLR4 on d 3, key for activation of innate immunity due to inflammation, in OVE compared with CON cows suggests a more pronounced inflammatory state. Feeding OVE ＋ SM dampened the upregulation of TLR4, despite the fact that these cows had similar expression of the pro-inflammatory genes NFKB1 and TNF as OVE. Cows in CON had lower overall expr

关键词： Blood neutrophil Gene expression Methionine

Hepatic metabolomics and transcriptomics to study susceptibility to ketosis in response to prepartal nutritional management

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Journal of Animal Science and Biotechnology 2020年第1期11卷 194-210页

作者： Khuram Shahzad Vincenzo Lopreiato Yusheng Liang Erminio Trevisi Johan S.osorio Chuang Xu Juan J.Loor COMSATS Institute of Information Technology ChakShahzadIslamabad 44000Pakistan Department of Animal Sciences and Division of Nutritional Sciences University of IllinoisUrbanaIL 61801USA Istituto di Zootecnica Facoltàdi Scienze AgrarieAlimentari e AmbientaliUniversitàCattolica del Sacro Cuore29122 PiacenzaItaly Department of Dairy Science South Dakota State UniversityBrookingsSD 57006USA College of Animal Science and Veterinary Medicine Heilongjiang Bayi Agricultural UniversityXinyang Rd.5Daqing 163319China.

Background:Ketosis in dairy cows is associated with body fat mobilization during the peripartal ***-clinical and clinical ketosis arise more frequently in cows that are overfed energy during the entire dry(last 50 to 45 days prior to parturition)or close-up period(last^28 days prepartum).Methods:A retrospective analysis was performed on 12 cows from a larger cohort that were fed a higher-energy diet[1.54 Mcal/kg of dry matter(DM);35.9%of DM corn silage and 13%of DM ground corn]during the close-up dry period,of which 6 did not develop clinical ketosis(OVE,0.83 mmol/L plasma hydroxybutyrate;BHB)and 6 were diagnosed with clinical ketosis(KET,1.4 mmol/L BHB)during the first week postpartum.A whole-transcriptome bovine microarray(Agilent Technologies)and metabolomics(GC-MS,LC-MS;Metabolon~?Inc.)were used to perform transcript and metabolite profiling of liver tissue harvested at-10 days relative to parturition which allowed to establish potential associations between prepartal transcriptome/metabolome profiles and susceptibility to clinical ketosis ***:Cows in KET had greater(P=0.01)overall body weight between-2 and 1 week around parturition,but similar body condition score than *** dry matter intake(DMI)did not differ prepartum,KET cows had lower(P<0.01)DMI and similar milk yield as OVE cows during the first week *** analysis revealed a total of 3065 differentially expressed genes(DEG;P≤0.05)in *** identified 15 out of 313 total biochemical compounds significantly affected(P≤0.10)in *** those,greater concentrations(P≤0.06,+2.3-fold)of glycochenodeoxycholate in KET cows also have been detected in humans developing non-alcoholic fatty liver *** analysis using the Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway database and the DEG revealed that,among the top 20 most-impacted metabolic pathway categories in KET,65%were overall *** included’Metabolism of cofactors

关键词： Bioinformatics Ketosis Metabolomics Transition cow

A scoping review on the field validation and implementation of rapid diagnostic tests for vector-borne and other infectious diseases of poverty in urban areas

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Infectious Diseases of Poverty 2018年第1期7卷 879-896页

作者： Lyda osorio Jonny Alejandro Garcia Luis Gabriel Parra Victor Garcia Laura Torres Stephanie Degroote Valery Ridde Epidemiology and Population Health Research Group School of Public HealthUniversidad del ValleCalle 4B No.36-00 Edif 118 Escuela de Salud PúblicaUniversidad del Valle Campus San FernandoCaliColombia School of Medicine Universidad del ValleCaliColombia University of Montreal Public Health Research Institute(IRSPUM) MontrealCanada French Institute for Research on Sustainable Development(IRD) Paris Descartes UniversityPopulation and Development Center(CEPED)UniversiteParis Sorbonne CiteNational Institute of Health and Medical Research(INSERM)HealthVulnerabilities and Gender Relations South(SAGESUD)ParisFrance

Background:Health personnel face challenges in diagnosing vector-borne and other diseases of poverty in urban *** is a need to know what rapid diagnostic technologies are available,have been properly assessed,and are being implemented to improve control of these diseases in the urban *** paper characterizes evidence on the field validation and implementation in urban areas of rapid diagnostics for vector-borne diseases and other diseases of *** body:A scoping review was ***-reviewed and grey literature were searched using terms describing the targeted infectious diseases,diagnostics evaluations,rapid tests,and urban *** review was limited to studies published between 2000 and 2016 in English,Spanish,French,and *** and exclusion criteria were refined post hoc to identify relevant literature regardless of study design and geography.A total of 179 documents of the 7806 initially screened were included in the ***(n=100)and tuberculosis(n=47)accounted for the majority of studies that reported diagnostics performance,impact,and implementation *** studies,assessing mainly performance,were identified for visceral leishmaniasis(n=9),filariasis and leptospirosis(each n=5),enteric fever and schistosomiasis(each n=3),dengue and leprosy(each n=2),and Chagas disease,human African trypanosomiasis,and cholera(each n=1).Reported sensitivity of rapid tests was variable depending on several ***,specificities were high(>80%),except for schistosomiasis and *** and implementation outcomes,mainly acceptability and cost,followed by adoption,feasibility,and sustainability of rapid tests are being evaluated in the *** to implementing rapid tests range from cultural to technical and administrative ***:Rapid diagnostic tests for vector-borne and other diseases of poverty are being used in the urban context with demonstrated impact on case ***

关键词： Communicable diseases Diagnostic services Point-of-care testing Field evaluation Sensitivity and specificity Implementation Evaluation studies Urban health

Experimental model for the description of the behaviour of a 9-mm projectile at a target

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Forensic Sciences Research 2021年第1期6卷 67-74页

作者： Patricia Morales-Vega Daniel Esteban Jaramillo-Arango Jaime Alberto osorio-Velez David Norena-Blandon Instituto de Fısica Universidad de AntioquiaMedellınColombia

Analysis of crime scenes involving single-fire-gun projectiles requires the determination of the direction of arrival of a projectile at the target and other factors to reconstruct *** movement of a projectile can be analyzed by applying Euler’s equations to a solid symmetrical rigid *** present work starts from a Newtonian reformulation of these equations to show that,in the presence of a gravitational field,the system can be expressed with a complex variable nonlinear equation,where the inclusion of small nutation variables allows us to find possible *** a particular case,we analyzed the movement of a 9-mm projectile fired from distances greater than 1 m to demonstrate that the direction of arrival of the projectile at the target cannot be traced by a stick placed in the target hole,as is usually performed in crime investigations.A series of shots were fired from distances varying between 1 m and 7 *** data were recorded on Riemann planes of projection for the description of nutation and precession motions,allowing the observation of the motion dynamics of the *** show that the direction of arrival at the target can be determined approximately from the analysis of the nutation and precession curves through Riemann planes of *** results presented in this work will allow more accurate judgements to be made in judicial investigations.

关键词： Forensic sciences forensic ballistics firearm gyroscopic motion Euler equations nutation precession projectile motion

Comparison of Control Techniques in a Weight Lifting Exoskeleton

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Journal of Bionic Engineering 2019年第4期16卷 663-673页

作者： Irving Rosales-Diaz Jesus Ricardo Lopez-Gutierrez Angel Eduardo Zamora Suarez Sergio Rosario Salazar Antonio osorio-Cordero Hipolito Aguilar-Sierra Rogelio Lozano CINVESTAV Av.Institute Politecnico Nacional 2508Col.San Pedro Zacatenco07360Mexico CityMexico CONACYT-CINVESTAV Av.Institute Politecnico Nacional 2508Col.San Pedro Zacatenco07360Mexico CityMexico Polytechnic University of Tulancingo St.Ingenierias 100Col.Huapalcalco43629TulancingoHidalgoMexico Centre de Recherches de Royalieu UTC-HEUDIASyCCompiegne60205France

The back pain is the most common injury in human activities where heavy objects must be lifted or must be suspended for a long time.A weight lifting exoskeleton also known as force augmentation exoskeleton is designed to reduce the strain on the back and the limbs and reduce the risk to suffer *** the other hand,different kinds of controllers have been implemented to achieve whit this goal,for example,a conventional PD Control,PD Control with Gravity Compensation,PD Control with Adaptive Desired Gravity Compensation and PD Control with Robust *** paper aims to evaluate and compare the performance from the previously cited controllers used to reduce the strain in the back,through the implementation of each controller in a three Degrees Of Freedom(DOF)exoskeleton powered by pneumatic muscle actuators;some numerical simulations as well as experimental trials have been conducted and three different performance indices were used in order to determine the effectiveness of each one with respect to the simple PD controller when the mass to be lifted is unknown.

关键词： augmenting force device exoskeleton robot pneumatic artificial muscles adaptive control robust control

Source identification and global implications of black carbon

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Geoscience Frontiers 2022年第1期13卷 404-416页

作者： Erika P.Blanco-Donado Ismael L.Schneider Paulo Artaxo Jesus Lozano-osorio Luana Portz Marcos L.S.Oliveira Department of Civil and Environmental Universidad de la CostaCUCBarranquilla080002Colombia Department of Applied Physics Institute of PhysicsUniversity of São PauloSP 05508-220Brazil Universidad de Lima Avenida Javier Prado Este 4600Santiago de Surco 1503Peru

Black carbon(BC)is one of the short-lived air pollutants that contributes significantly to aerosol radiative forcing and global climate *** is emitted by the incomplete combustion of fossil fuels,biofuels,and *** environments are quite complex and thus,the use of mobile jointly with fixed monitoring provides a better understanding of the dynamics of BC distribution in such *** present study addresses the measurement of BC concentration using real-time mobile and ambient monitoring in Barranquilla,an industrialized urban area of the Colombian Caribbean.A microaethalometer(MA200)and an aethalometer(AE33)were used for measuring the BC *** absorption Ångström exponent(AAE)values were determined for the study area,for identifying the BC emission *** results of the ambient sampling show that vehicle traffic emissions prevail;however,the influence of biomass burning was also *** mean ambient BC concentration was found to be 1.04±1.03μg/m^(3) and varied between 0.5 and 4.0μg/m^(3).From the mobile measurements obtained in real traffic conditions on the road,a much higher average value of 16.1±16.5μg/m^(3) was *** parts of the city showed BC concentrations higher than 20μg/m^(3).The spatial distribution of BC concentration shows that vehicle emissions and traffic jams,a consequence of road and transport infrastructure,are the factors that most affect the BC concentration.A comparison of results obtained from two aethalometers indicates that the concentrations measured by MA200 are 9%lower than those measured by *** AAE obtained was found to vary between 1.1 and 1.6,indicating vehicular emissions as the most crucial *** addition,it was observed that the BC concentration on working days was 2.5 times higher than on the weekends in the case of mobile monitoring and 1.5 times higher in the case of ambient monitoring.

关键词： Air pollution Black carbon Spatial distribution Source apportionment AbsorptionÅngström exponent

Health and widowhood: Meanings and experience of elderly women in Chile

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Health 2013年第8期5卷 1272-1276页

作者： Paulina osorio-Parraguez Department of Anthropology Faculty of Social Sciences University of Chile Santiago Chile

Aging and widowhood signal a real and symbolic landmark of change toward new vital experiences of elderly people. In the aging experience of women, there are three social age markers that participate directly in the construction of their identity as women during old age: menopause, work and widowhood. The present paper reports the results of a research on widowhood in old age and the experience of aging in elderly women in Chile. Through a qualitative methodological strategy, in depth biographic interviews were held with elderly people who were widowed after reaching 60 years of age, centering the analysis on its meanings on the body, health and death in old age, highlighting sociocultural aspects of the aging and widowing processes. Approaching widowhood in old age shows us not only a person who has lost a husband, but also what it means to be an elderly woman in a life experience continuum that also brings about key changes to understand the aging process of people, because marital relations can get to be determining factors for the construction of the identity of women and their experience of the aging process.

关键词： Meanings of Health Widowhood Elderly Women Aging Chile