This paper addresses a flexible micro aerial vehicle (MAV) under spatiotemporally varying disturbances, which is composed of rigid body and two wings. Based on Hamilton's principle, distributed parameter system coupling in bending twisting, modeled. Two iterative learning control (ILC) schemes are designed to suppress the vibrations reject disturbances regulate displacement track prescribed constant trajectory. At basis composite energy function, boundedness convergence proved for...

MnOx/TiO2 (anatase) nanosheets (NS) with a preferentially exposed {001} facet was found to be better catalyst for selective catalytic reduction (SCR) of NO than conventionally employed nanoparticles (NP) the {101} exposed, affording both high conversion and N2 selectivity at 80–280 °C. Further investigations indicated that Mn3+ as major species on TiO2 incorporated into octahedral vacancies lower polymerization degree, resulting in activity SCR low NH3 oxidation, thus restraining undesirable...

This paper addresses the vibration control and input constraint for an Euler-Bernoulli beam system under aperiodic distributed disturbance boundary disturbance. Hyperbolic tangent functions saturation are adopted to tackle constraint. A restrained adaptive iterative learning (ABILC) law is proposed based on a time-weighted Lyapunov-Krasovskii-like composite energy function. In order deal with uncertainty of parameter reject external disturbances, three laws designed learned in iteration...

This paper addresses the vibration control and trajectory tracking of a robotic arm system with input constraint. A hyperbolic tangent function saturation are adopted to tackle By defining composite energy function, dual-loop iterative learning (ILC) law is designed by integrating restrained saturated feedback law. For closed-loop system, angle displacements asymptotically regulated track prescribed constant elastic suppressed zero along iteration axis. Simulation experimental results...

In this brief, a boundary control scheme is designed to suppress the vibration for nonlinear drilling riser system. Considering varying length, tension, and speed of riser, modeled as moving Euler-Bernoulli beam system, which described by partial differential equation four ordinary equations. Employing Lyapunov's direct method, proposed guarantee closed-loop system being exponentially stable. Extensive numerical simulations are presented show effectiveness law.

Abstract Converting low-grade heat from environment into electricity shows great sustainability for mitigating the energy crisis and adjusting configurations. However, thermally rechargeable devices typically suffer poor conversion efficiency when a semiconductor is employed. Breaking convention of thermoelectric systems, we propose demonstrate new zinc ion thermal charging cell to generate via thermo-extraction/insertion thermodiffusion processes insertion-type cathode (VO 2 -PC)...

In this brief, a vibration suppression scheme is investigated for flexible string system with input hysteresis. The hysteresis formulated as linear desired and "disturbance-like" term, whose unknown bound then estimated by an adaptive law. Without constructing inverse, boundary control designed to suppress the vibrations of string, cope uncertainties parameters, tackle nonlinearities. Based on extended LaSalle's invariance principle, asymptotic stability closed-loop also manifested....

Diabetes is the main chronic disease that greatly affects human life.

Abstract N- Arylation of NH -sulfoximines represents an appealing approach to access aryl sulfoximines, but has not been successfully applied -diaryl sulfoximines. Herein, a copper-catalyzed photoredox dehydrogenative Chan-Lam coupling free diaryl sulfoximines and arylboronic acids is described. This neutral ligand-free initiated by ambient light-induced single-electron reduction -sulfoximines. electron transfer route circumvents the sacrificial oxidant employed in traditional reactions,...

Background and Objectives: Successful root canal treatment depends on the thorough removal of biofilms through chemomechanical preparation. This study aimed to investigate compare cleaning disinfecting efficiency oval-shaped canals using XP-endo Shaper (XPS), ProTaper Next (PTN), HyFlex CM (HCM) in combination with passive ultrasonic irrigation (PUI). Materials Methods: Ninety extracted teeth were contaminated randomly divided into three groups: XPS, PTN, HCM. Each group was assigned...

Acquired drug resistance poses a significant challenge in osteosarcoma therapy. Therefore, it is necessary for us to discover and develop an alternative anti-cancer strategy. Previous studies have shown that eicosapentaenoic acid (EPA) significantly increases chemosensitivity cancer cells. In this study, we discovered EPA enhances the sensitivity of cisplatin (DDP). Interestingly, addition inhibiting growth inducing apoptosis, also DDP-induced ferroptosis. Western blot analysis confirmed...

Inspired by the discovery of a S═N bond in collagen IV network and its essential role stabilizing basement membranes, sulfilimines have drawn much attention fields chemistry biology. However, their further uptake is hindered lack mild, efficient, environmentally benign protocols which can be constructed under biomolecule-compatible conditions. Here, we report terminal oxidant-free copper-catalyzed dehydrogenative Chan–Lam coupling free diaryl with arylboronic acids excellent chemoselectivity...

This article proposes an adaptive observer-based control to address the PDE–ODE coupled system of a flexible wing, where external disturbances and references have unknown frequencies, amplitudes, phases. An exosystem is defined for above signals, however with matrix initial values. By finding its detectable form, state-feedback designed based on adaption law whose uncertainties are merely from matrix. In this case, filter systems tracking error observer system, which further gives equivalent...

The multilayer films were fabricated by layer-by-layer electrostatically coassembling graphene oxide and a ruthenium complex of [Ru(bpy)2L](ClO4)2 {L = 2-(2,6-di(pyridin-2-yl)pyridine-4-yl)-1H-imidazo[4,5-f]-1,10-phenanthroline} characterized using UV-vis absorption spectroscopy, X-ray photoelectron scanning electron microscopy, cyclic voltammetry. dependence redox properties cathodic photocurrents on the number layers deposited photocurrent generation mechanism polarity studied in detail....

Leveraging the elevated levels of hydrogen peroxide (H2O2) in cancer, inflammatory diseases and cardiovascular disorders, H2O2-activated promoieties have been widely used drugs biomaterials design. However, overwhelming majority only share common structure a H2O2-responsive arylboronic acid/ester moiety with low diversity. We report here an unprecedented strategy to construct novel prodrugs based on α-ketoamide structure. As proof concept, we designed synthesized panel nitrogen mustard...

In this paper, vibration control and output constraint are considered for a Timoshenko beam system with input backlash external disturbances. By integrating iterative learning (ILC) into adaptive control, two dual-loop ILC schemes proposed in the presence of backlash. Two observers designed to estimate bounded terms, which divided from inputs. Based on defined barrier composite energy function, all signals proved be each iteration. Along iteration axis: 1) endpoint transverse displacements...

Near-IR-emitting and/or efficiently photodynamic water-soluble Ru(II) complexes that hold great application potentials as therapy photodetection agents for cancers have been poorly explored. In this paper, the solvatochromism, calf thymus DNA binding, and singlet oxygen generation properties of a known ruthenium(II) complex visible-emitting [Ru(bpy)2(dtdpq)](ClO4)2 (Ru1) new homoleptic near-IR-emitting [Ru(dtdpq)3](ClO4)2 (Ru2) (bpy = 2,2'-bipyridine, dtdpq...

Flapping-wing robots (FWRs) have great potential in comprehensively optimizing the flexibility, cruising speed, load capacity, and robot mass. Recently, researchers focused on small-wingspan FWRs but with a large limitation of payload endurance. In this article, we design an eagle-like FWR vision system flight control system, where wingspan is as long 1.78 m mass 985 g (without system). Even though carries module weighing 165 g, it can cruise for more than 1 h speed frequently reaches 5.9...