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The type of lipid supplement has crucial implications for forage particle size in calf starter diets

Journal of Animal Science and Biotechnology 2023年第6期14卷 2525-2538页

作者： Pedram Panahiha hamidreza mirzaei‑alamouti Mehdi Kazemi‑Bonchenari Mehdi Poorhamdollah Mina Vazirigohar Jorg R.Aschenbach Department of Animal Science University of ZanjanZanjan 45371‑38791Iran. Department of Animal Science Faculty of Agriculture and Natural ResourcesArak UniversityArak 38156‑8‑8349Iran. Department of Animal Science College of Agriculture and Natural ResourcesUniversity of TehranKaraj 31587‑11167Iran. Zist Dam Group University of Zanjan Incubator CenterZanjan 45371‑38791Iran. Institute of Veterinary Physiology Freie Universitat BerlinOertzenweg 19B14163 BerlinGermany.

Background Forage inclusion in starters of young dairy calves has become an acceptable strategy in the last *** compensate for the lower energy provided by forage,concurrent lipid supplementation can be ***-ever,ruminal microbial activity and forage digestibility may be decreased by lipid *** hypothesized that the composite effect of forage and lipid supplements may be dependent on forage particle size and the type of lipid ***,we evaluated the effect of long(LP;geometric mean,4.97 mm)*** alfalfa hay particle sizes(SP;geometric mean,1.26 mm)with either soybean oil(SBO)or palm fatty acids(PLF)as lipid source in a 2×2 factorial design with treatments SP-SBO,SP-PLF,LP-SBO,and ***(n=13 with 6 males and 7 females each)were offered to Holstein calves(3 days old)with equal amounts of lipid(25 g/kg DM)through-out the experimental *** milk offering scheme(d 1 to 53)was equal for all *** collection continued until 20 d *** Interaction between forage particle size and lipid supplement was significant for the following readouts:the highest and lowest starter intakes during the pre-weaning period occurred in LP-PLF and LP-SBO,*** was associated with similarly contrasting changes in average daily gain(ADG)during the post-weaning period,body weight at the end of experiment,withers height,digestibility of organic matter and neutral detergent fiber,and blood serum concentrations of glucose,beta-hydroxybutyrate,and insulin during the pre-weaning ***-ing both pre-and post-weaning periods,the highest and lowest urinary excretion of allantoin and total purine deriva-tives,representing microbial protein synthesis,were observed in LP-PLF and LP-SBO,respectively,indicating that those diets were most and least favorable for rumen *** of forage particle size,supplemental SBO *** increased serum malondialdehyde as an oxidative stress indicator across p

关键词： Forage particle size Lipid supplement Oxidative stress Ruminal functional development

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Risk-Informed Model-Free Safe Control of Linear Parameter-Varying Systems

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IEEE/CAA Journal of Automatica Sinica 2024年第9期11卷 1918-1932页

作者： Babak Esmaeili hamidreza Modares Department of Mechanical Engineering Michigan State UniversityEast LansingMI 48863 USA

This paper presents a risk-informed data-driven safe control design approach for a class of stochastic uncertain nonlinear discrete-time *** nonlinear system is modeled using linear parameter-varying(LPV)systems.A model-based probabilistic safe controller is first designed to guarantee probabilisticλ-contractivity(i.e.,stability and invariance)of the LPV system with respect to a given polyhedral safe *** obviate the requirement of knowing the LPV system model and to bypass identifying its open-loop model,its closed-loop data-based representation is provided in terms of state and scheduling data as well as a decision *** is shown that the variance of the closedloop system,as well as the probability of safety satisfaction,depends on the decision variable and the noise covariance.A minimum-variance direct data-driven gain-scheduling safe control design approach is presented next by designing the decision variable such that all possible closed-loop system realizations satisfy safety with the highest confidence *** minimum-variance approach is a control-oriented learning method since it minimizes the variance of the state of the closed-loop system with respect to the safe set,and thus minimizes the risk of safety *** the certainty-equivalent approach that results in a risk-neutral control design,the minimum-variance method leads to a risk-averse control *** is shown that the presented direct risk-averse learning approach requires weaker data richness conditions than existing indirect learning methods based on system identification and can lead to a lower risk of safety *** simulation examples along with an experimental validation on an autonomous vehicle are provided to show the effectiveness of the presented approach.

关键词： Data-driven control linear parameter-varying systems probabilistic control safe control

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A Study on the Transmission Dynamics of the Omicron Variant of COVID-19 Using Nonlinear Mathematical Models

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 2265-2287页

作者： S.Dickson S.Padmasekaran Pushpendra Kumar Kottakkaran Sooppy Nisar hamidreza Marasi Department of Mathematics Periyar UniversitySalemTamilnadu636011India Faculty of Engineering and Natural Sciences Istanbul Okan UniversityIstanbulTurkey Department of Mathematics College of Science and Humanities in AlkharjPrince Sattam Bin Abdulaziz UniversityAlkharj11942Saudi Arabia Department of Applied Mathematics Faculty of MathematicsStatistics and Computer ScienceUniversity of TabrizTabrizIran

This research examines the transmission dynamics of the Omicron variant of COVID-19 using SEIQIcRVW and SQIRV models,considering the delay in converting susceptible individuals into infected *** significant delays eventually resulted in the pandemic’s *** ensure the safety of the host population,this concept integrates quarantine and the COVID-19 *** investigate the stability of the proposed *** fundamental reproduction number influences stability *** to our findings,asymptomatic cases considerably impact the prevalence of Omicron infection in the *** real data of the Omicron variant from Chennai,Tamil Nadu,India,is used to validate the outputs.

关键词： Omicron local stability reproduction number steady states global stability

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Prevalence of Anemia in Patients with Diabetes Mellitus:A Systematic Review and Meta-Analysis

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Biomedical and Environmental Sciences 2024年第1期37卷 96-107页

作者： Monireh Faghir-Ganji Narjes Abdolmohammadi Maryam Nikbina Alireza Amanollahi Alireza Ansari-Moghaddam Rozhan Khezri hamidreza Baradaran Student Research Committee Iran University of Medical SciencesTehranIran Department of Epidemiology School of Public HealthIran University of Medical SciencesTehranIran Department of Epidemiology School of Public HealthTehran University of Medical SciencesTehranIran Department of Midwifery Shoushtar Faculty of Medical SciencesShoushtarIran Department of Epidemiology School of Public Health and SafetyShahid Beheshti University of Medical SciencesTehranIran Trauma and Injury Research Center Iran University of Medical SciencesTehranIran Health Promotion Research Center Zahedan University of Medical SciencesZahedanIran Endocrine Research Center Institute of Endocrinology and MetabolismIran University of Medical SciencesTehranIran

Objective Anemia is a common public health concern in patients with type 2 diabetes *** study aimed to identify the prevalence of anemia among patients with *** Electronic databases,including PubMed,Scopus,Web of Sciences,and Google Scholar,were searched systematically for studies published between 2010 and *** removing duplicates and inappropriate reports,the remaining manuscripts were reviewed and appraised using theNewcastleOttawa Scale(NOS)tool.A random-effects model was used to calculate the pooled estimates of the extracted data using Stata version *** of the studies was assessed using the Q *** A total of 51 articles containing information on 26,485 patients with diabetes were included in this *** articles were mainly from Asia(58.82%)and Africa(35.29%).The overall prevalence of anemia was 35.45%(95%CI:30.30–40.76),with no evidence of heterogeneity by *** the two continents with the highest number of studies,the prevalence of anemia in patients with diabetes was significantly higher in Asia[40.02;95%CI:32.72–47.54]compared to Africa[28.46;95%CI:21.90–35.50](P for heterogeneity=0.029).Moreover,there has been an increasing trend in the prevalence of anemia in patients with diabetes over time,from[15.28;95%CI:9.83–22.21]in 2012 to[40.70;95%CI:10.21–75.93]in *** Globally,approximately 4 in 10 patients with diabetes suffer from ***,routine anemia screening and control programs every 3 months might be useful in improving the quality of life of these patients.

关键词： Prevalence Diabetic foot Anemia Diabetes mellitus

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Deterministic and Stochastic Fixed-Time Stability of Discrete-time Autonomous Systems

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IEEE/CAA Journal of Automatica Sinica 2023年第4期10卷 945-956页

作者： Farzaneh Tatari hamidreza Modares Mechanical Engineering Department Michigan State UniversityMichigan 48824-1226 USA

This paper studies deterministic and stochastic fixedtime stability of autonomous nonlinear discrete-time(DT)*** conditions are first presented under which the fixed-time stability of deterministic DT systems is *** to systems under deterministic perturbations as well as stochastic noise are then *** the former,sensitivity to perturbations for fixed-time stable DT systems is analyzed,and it is shown that fixed-time attractiveness results from the presented Lyapunov *** the latter,sufficient Lyapunov conditions for fixed-time stability in probability of nonlinear stochastic DT systems are *** fixed upper bound of the settling-time function is derived for both fixed-time stable and fixed-time attractive systems,and a stochastic settling-time function fixed upper bound is derived for stochastic DT *** examples are given along with simulation results to verify the introduced results.

关键词： Discrete-time(DT)systems fixed-time stability nonlinear systems stochastic systems

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Conflict-Aware Safe Reinforcement Learning:A Meta-Cognitive Learning Framework

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IEEE/CAA Journal of Automatica Sinica 2022年第3期9卷 466-481页

作者： Majid Mazouchi Subramanya Nageshrao hamidreza Modares Michigan State University East LansingMI 48824 USA Ford Research and Innovation Center Ford Motor CompanyPalo AltoCA 94304 USA IEEE

In this paper,a data-driven conflict-aware safe reinforcement learning(CAS-RL)algorithm is presented for control of autonomous *** safe RL results with predefined performance functions and safe sets can only provide safety and performance guarantees for a single environment or *** contrast,the presented CAS-RL algorithm provides safety and performance guarantees across a variety of circumstances that the system might *** is achieved by utilizing a bilevel learning control architecture:A higher metacognitive layer leverages a data-driven receding-horizon attentional controller(RHAC)to adapt relative attention to different system’s safety and performance requirements,and,a lower-layer RL controller designs control actuation signals for the *** presented RHAC makes its meta decisions based on the reaction curve of the lower-layer RL controller using a metamodel or *** specifically,it leverages a prediction meta-model(PMM)which spans the space of all future meta trajectories using a given finite number of past meta *** will adapt the system’s aspiration towards performance metrics(e.g.,performance weights)as well as safety boundaries to resolve conflicts that arise as mission scenarios *** will guarantee safety and feasibility(i.e.,performance boundness)of the lower-layer RL-based control *** is shown that the interplay between the RHAC and the lower-layer RL controller is a bilevel optimization problem for which the leader(RHAC)operates at a lower rate than the follower(RL-based controller)and its solution guarantees feasibility and safety of the control *** effectiveness of the proposed framework is verified through a simulation example.

关键词： Optimal control receding-horizon attentionalcontroller(RHAC) reinforcement learning(RL)

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Finite-Time Distributed Identification for Nonlinear Interconnected Systems

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IEEE/CAA Journal of Automatica Sinica 2022年第7期9卷 1188-1199页

作者： Farzaneh Tatari hamidreza Modares Christos Panayiotou Marios Polycarpou Mechanical Engineering Department Michigan State UniversityEast LansingMI 48824 USA KIOS Research and Innovation Center of Excellence and the Department of Electrical and Computer Engineering University of CyprusNicosia 1678Cyprus IEEE

In this paper,a novel finite-time distributed identification method is introduced for nonlinear interconnected systems.A distributed concurrent learning-based discontinuous gradient descent update law is presented to learn uncertain interconnected subsystems’*** concurrent learning approach continually minimizes the identification error for a batch of previously recorded data collected from each subsystem as well as its neighboring *** state information of neighboring interconnected subsystems is acquired through direct *** overall update laws for all subsystems form coupled continuous-time gradient flow dynamics for which finite-time Lyapunov stability analysis is *** a byproduct of this Lyapunov analysis,easy-to-check rank conditions on data stored in the distributed memories of subsystems are obtained,under which finite-time stability of the distributed identifier is *** rank conditions replace the restrictive persistence of excitation(PE)conditions which are hard and even impossible to achieve and verify for interconnected ***,simulation results verify the effectiveness of the presented distributed method in comparison with the other methods.

关键词： Distributed concurrent learning finite-time identification nonlinear interconnected systems unknown dynamics

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Optimal Synchronization Control of Heterogeneous Asymmetric Input-Constrained Unknown Nonlinear MASs via Reinforcement Learning

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IEEE/CAA Journal of Automatica Sinica 2022年第3期9卷 520-532页

作者： Lina Xia Qing Li Ruizhuo Song hamidreza Modares Beijing Engineering Research Center of Industrial Spectrum Imaging School of Automation and Electrical EngineeringUniversity of Science and Technology Beijing IEEE the Department of Mechanical Engineering Michigan State University

The asymmetric input-constrained optimal synchronization problem of heterogeneous unknown nonlinear multiagent systems(MASs)is considered in the ***,a state-space transformation is performed such that satisfaction of symmetric input constraints for the transformed system guarantees satisfaction of asymmetric input constraints for the original ***,considering that the leader’s information is not available to every follower,a novel distributed observer is designed to estimate the leader’s state using only exchange of information among neighboring *** that,a network of augmented systems is constructed by combining observers and followers dynamics.A nonquadratic cost function is then leveraged for each augmented system(agent)for which its optimization satisfies input constraints and its corresponding constrained Hamilton-Jacobi-Bellman(HJB)equation is solved in a data-based *** specifically,a data-based off-policy reinforcement learning(RL)algorithm is presented to learn the solution to the constrained HJB equation without requiring the complete knowledge of the agents’*** of the improved RL algorithm to the solution to the constrained HJB equation is also ***,the correctness and validity of the theoretical results are demonstrated by a simulation example.

关键词： Asymmetric input-constrained heterogeneousnonlinear multiagent systems(MASs) Hamilton-Jacobi-Bellman(HJB)equation novel observer reinforcement learning(RL)

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T_(M)-Eigenvalues of Odd-Order Tensors

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Communications on Applied Mathematics and Computation 2022年第4期4卷 1258-1279页

作者： M.Pakmanesh hamidreza Afshin Department of Mathematics Vali-e-Asr University of RafsanjanRafsanjanIran

In this paper,we propose a definition for eigenvalues of odd-order tensors based on some ***,we define the Schur form and the Jordan canonical form of such tensors,and discuss commuting families of ***,we prove some e... 详细信息

关键词： T_(M)-product T_(M)-eigenvalue T_(M)-Schur form T_(M)-Jordan canonical form Odd-order tensor F_(M)-upper(lower)triangular tensor

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Direct production of hydrogen peroxide over bimetallic CoPd catalysts:Investigation of the effect of Co addition and calcination temperature

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Green Energy & Environment 2023年第1期8卷 246-257页

作者： hamidreza Nazeri Alireza Najafi Chermahini Zahra Mohammadbagheri Mirko Prato Department of Chemistry Isfahan University of Technology84154-83111IsfahanIran Materials Characterization Facility Istituto Italiano di TecnologiaVia Morego 3016163GenovaItaly

A series of CoPd/KIT-6 bimetallic catalysts with various Co:Pd molar ratios at different calcination temperatures were prepared and used for the direct synthesis of H_(2)O_(2) from H_(2) and O_(2).These catalysts were characterized by nitrogen adsorption-desorption,low and wide-angle X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),transmission electron microscopy(TEM),scanning electron microscopy(SEM),elemental mapping and energy-dispersive X-ray(EDX)*** was found that the particle size,electronic interactions,morphology,and textural properties of these catalysts as well as their catalytic activity in the reaction of H_(2) with O_(2) were affected by Co addition and different calcination ***,the results showed that while the H_(2)O_(2) selectivity depends on Pd^(2+) species,the H_(2) conversion is related to Pd0 active *** these catalysts,CoPd/KIT-6 calcined at 350℃(CoPd/KIT-350 catalyst)showed the best catalytic activity with 50%of H_(2)O_(2) selectivity and 51%conversion of H_(2).

关键词： Direct synthesis of hydrogen peroxide Co/Pd catalysts Selectivity The oxidation state of Pd Reusability

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