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| 1 | Aerodynamic Effects Compensation on Multi-Rotor UAVs Based on a Neural Network Control Allocation Approach显示文摘This paper shows that the aerodynamic effects can be compensated in a quadrotor system by means of a control allocation approach using neural networks.Thus,the system performance can be improved by replacing the classic allocation matrix,without using the aerodynamic inflow equations directly.The network training is performed offline,which requires low computational power.The target system is a Parrot MAMBO drone whose flight control is composed of PD-PID controllers followed by the proposed neural network control allocation algorithm.Such a quadrotor is particularly susceptible to the aerodynamics effects of interest to this work,because of its small size.We compared the mechanical torques commanded by the flight controller,i.e.,the control input,to those actually generated by the actuators and established at the aircraft.It was observed that the proposed neural network was able to closely match them,while the classic allocation matrix could not achieve that.The allocation error was also determined in both cases.Furthermore,the closed-loop performance also improved with the use of the proposed neural network control allocation,as well as the quality of the thrust and torque signals,in which we perceived a much less noisy behavior. | Sarah P.Madruga Augusto H.B.M.Tavares Saulo O.D.Luiz Tiago P.do Nascimento Antonio Marcus N.Lima | 2022 | IEEE/CAA Journal of Automatica Sinica2022，9，2： | 2 |
| 2 | Partial Left Ventriculectomy to Improve Left Ventricular Function in End‐Stage Heart Disease显示文摘 | Randas J.V.Batista Jose L.V.Santos NoriakiTakeshita LiseBocchino Paulo N.Lima Marco A.Cunha | 2007 | Journal of Cardiac Surgery2007，，： | 1 |
| 3 | New perspectives for mesenchymal stromal cells as an adjuvant therapy for infectious disease-associated encephalopathies显示文摘Knowledge of the mechanisms that trigger infection-related encephalopathies is still very limited and cell therapies are one of the most promising alternatives for neurodegenerative diseases,and its application in infectious diseases can be of great relevance.Mesenchymal stromal cells are cells with great immunomodulatory potential;therefore,their use in clinical and preclinical studies in a variety of diseases,including central nervous system diseases,increased in the last decade.Mesenchymal stromal cells can exert their beneficial effects through several mechanisms,such as direct cell contact,through surface receptors,and also through paracrine or endocrine mechanisms.The paracrine mechanism is widely accepted by the scientific community and involves the release of soluble factors,which include cytokines,chemokines and trophic factors,and extracellular vesicles.This mini review discusses mesenchymal stromal cells mechanisms of action in neurological disorders,the neuroinflammatory process that takes place in the brain as a result of peripheral inflammation and changes in the brain’s cellular scenario as a common factor in central nervous system diseases,and mesenchymal stromal cells therapy in encephalopathies.Mesenchymal stromal cells have been shown to act in neuroinflammation processes,leading to improved survival and mitigating behavioral damage.More recently,these cells have been tested in preclinical models of infectious diseases-associated encephalopathies(e.g.,cerebral malaria and sepsis associated encephalopathy)and have shown satisfactory results. | Maiara N.Lima Maria C.Barbosa-Silva Tatiana Maron-Gutierrez | 2022 | Neural Regeneration Research2022，17，1： | 0 |
| 4 | Chitosan and Carboxymethylchitosan as High Turbidity Water Biocoagulants显示文摘Biocoagulants emerges as a promising technology in water treatment,in order to exploit renewable and biodegradable materials.The present work aims to study the coagulant action of chitosan and carboxymethylchitosan on water with very high turbidity(above 300 NTU),contrasting the physicochemical results with those obtained for aluminum sulphate.Carboxymethylchitosan was produced by the Williamson’s ethers synthesis and characterized by potentiometric titration,FTIR and 1 H-NMR.The coagulant tests were performed using synthetic water in a Jar-test equipment,through the induction of high and low velocity gradients,followed by sedimentation.The results showed turbidity and color removal efficiencies above 99%for the biocoagulants,by applying dosages much lower than those used for aluminum sulphate;the volume of sedimentable solids obtained at the end of the water treatment process was much lower when chitosan and carboxymethylchitosan were used as coagulants(reduction of 25%when compared to aluminum sulphate).In summary,carboxymethylchitosan is a non-toxic,renewable,biodegradable material with high efficiency as a coagulant for waters with very high turbidity,showing promise for in natura applications. | Raimundo N.Lima Júnior João L.I.O.Almeida Jones de Andrade Flávia O.M.S.Abreu | 2020 | Journal of Renewable Materials2020，8，11： | 0 |
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