Abstract Mo/Mo–SiO 2 /SiO solar‐selective coating for high‐temperature solar thermal application is prepared on quartz glass by direct‐current (DC) and radio‐frequency (RF) co‐sputtering. The normal absorptance α n = 0.95 emittance ε 0.097 (353 K) are obtained through process optimization. reflectance R ( λ ) before after 1073 K vacuum annealing, measured ultraviolet–visible–infrared (UV–VIS–IR) Fourier transform infrared (FT‐IR) spectroscopy. There only a slight increase in IR region which...

This paper mainly investigates the consensus control problem of multi-agent system with actuator fault under leader-follower topology structure. For fault, additive and multiplicative are also considered in this paper. It is worth noting here that for we only consider follower agent. other factors can affect functionality, external bounded disturbance nonlinear factor all agents. The main organization structure as follows. Firstly, by constructing adaptive observer, estimated values unknown...

This paper presents a fault-tolerant flight control method for multi-rotor UAV under actuator failure and external wind disturbances. The is based on an active disturbance rejection controller (ADRC) spatio-temporal radial basis function neural networks, which can be used to achieve the stable of system when parameters mathematical model change. Firstly, with optimized parameter design designed rthe obust vehicle. Secondly, network new adaptive kernel designed. In addition, output novel...

Abstract A two‐dimensional (2D) Mo photonic crystal (PhC) surface is proposed for high‐temperature solar‐selective absorber. The influence of PhC structural parameters on the reflectance between 0.3 and 12 µm studied by rigorous coupled‐wave analysis (RCWA) method. Simulation results show that such a with submicrometer periodicity exhibits high solar absorbance α together low thermal emittance ε , while former can be improved grading profile aspect ratio. Optimized microcone normal n = 0.919...

Knowledge transfer model of software process improvement (SPI) and the conceptual framework influencing factors are established. The includes five elements which knowledge transfer, sources knowledge, recipients relationship parties, environment transfer. ten key ambiguity, systematism, willingness, capacity impartation, absorption, incen-tive mechanism, culture, technical support, trust distance. research hypothesis is put forward. Em-pirical study concludes that among SPI staffs has...

In this work, an adaptive sliding mode fault-tolerant controller is proposed for a class of uncertain systems with time delay. The integral term added to the traditional surface improve robustness control system, and then type special designed cancel reaching based on global method. Without need fault detection isolation, law estimate value actuator faults, guarantee asymptotic stability dynamics. Finally, presented scheme applied position Qball-X4 quad-rotor UAV model verify effectiveness.

The paper is concerned with UAVs formation system in case of single UAV actuator fault. For distributed formation, a new fault diagnosis method based on the unknown input observer proposed. According to hierarchical concepts control system, controllers for and multi-UAV formations are designed, respectively. When occurs, an effective detection systems observers presented. Then, augmented proposed estimate In Simulation, using FDC toolbox build model UAV. known parameters, numerical...

Microcrystalline silicon, which is widely used in the microelectronics industry, usually fabricated by chemical vapor deposition techniques. In recent years, magnetron sputtering has been considered as an alternative because it a simpler, cheaper and more eco-friendly technique. The big drawback of this technique, however, need to recrystallize as-deposited amorphous can be done metal-induced crystallization. Among different suitable metals, copper not extensively investigated for purpose....

In this paper, we design a novel sliding mode prediction fault-tolerant control algorithm for multi-delays discrete uncertain systems with sensor fault. The global surface is designed to replace the traditional linear as predictive model ensure robustness of system. For fault and buffeting, power-dependent function reference trajectory compensation attenuate chattering achieve better stability. process rolling optimization, an improved whale optimization developed. On premise obtaining good...

Tunnel excavation is prone to segment cracks, which may lead serious safety accidents. This work aims investigate the type, location and occurrence time of cracks in a large-diameter underwater shield tunnel also ascertain causes cracks. The correlations between crack characteristics tunneling parameters were analyzed. effect jack deflection poor assembly on investigated using refined finite element model two consecutive rings with consideration clearance constraint machine. results...

In this article, fabrication and characterization data for a focusing Mo field emission array (FEA) are presented. This FEA is made by technique of self-aligned photolithography. The final structure referred to as double-gate array, with the gates acting extraction electrodes. With photolithography, gate aperture both kept absolutely coaxial their corresponding tips, ratio between diameters controllable. A scanning electron microscope image completed microstructure shows diameter be small...

Abstract Thin film transistors with In 2 O 3 channel were fabricated. The layer of and gate dielectric Ta 5 in the device was deposited by reactive sputtering using metal targets. A thin Bi on then an‐ nealed to help stabilize performance. optimal dose exhibited a mobility 12 cm /V s. Effects influence performance are investigated. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

This paper proposes a fault-tolerant aircraft control method based on self-constructed fuzzy neural network for quadcopters with multiple actuator faults. We first introduce the failure model and uncertainty. Subsequently, we establish framework observer an adaptive rate to obtain estimated value of nonlinear term module also design multivariable sliding mode controller ensure stability under this fault condition. Finally, conduct experiments using Pixhawk 4 flight installed QBall-X4 UAV...

In geotechnical engineering, vertical drainage is the most economical method for accelerating consolidation of a large area soft ground. this study, we analyze viscoelasticity soil and actual conditions on top surface soil, then introduce continuous boundary adopt fractional derivative model to describe soil. With use model, governing partial differential equation drains under obtained. application Crump numerical inversion method, solution also Further, rationality proposed verified by...

Abstract A glass‐based poly‐Si/SiO 2 /α‐Si multilayer film with high reflectivity across the whole visible band is realized and reported in this letter, which could be used plasma display panels to improve their luminescent efficiency. All layers are deposited by dc sputtering at room temperature. The poly‐Si layer formed Cu‐induced α‐Si crystallization degree of ∼73% crystal grain size ∼48 nm. With alternating refractive index low SiO , total higher than 60% most ∼80% within 400–700 nm...

<title>Abstract</title> To address the significant ecological impact caused by constructing access roads for tunnel excavation in steep and rugged canyon areas, a novel method is proposed this paper. This suggests that waste slag materials are rapidly transported through an elongated chute attached to mountain surface. study utilizes theoretical analysis, on-site experiments, numerical simulations investigate sliding characteristics of chutes efficient disposal. Through analysis determine...

The software capability maturity model (SW-CMM) provides organizations with guidance to how gain control of their processes for developing and maintaining evolve toward a culture engineering management excellence. Prof. J.N.Warfield has tried identify name each distinctive origin one or more behaviorally related symptoms. Mindbugs (cognitive barriers) according SW-CMM are studied. research finds that the most mindbugs process improvement is misattribution consensus through demonstration...

This paper identifies the risks of a company which is working at software outsourcing projects between Hongkong and Guangdong, discovers causal relationships among risk factors, constructs corresponding structure model with Interpretive Structural Modeling. Five original factors are discovered, including contracts risk, requirements definition change, lack communication, political legal environment differences, exchange rate fluctuations. Finally, three advices proposed for business...

For a class of time-delay discrete systems with constraints, actuator faults and polytopic-type uncertainties, the problem robust fault-tolerant control is researched in this paper. Firstly, new state space model output error introduced for reference trajectory tracking control, which provides more scope controller designs improves effect. Then based on predictive theorem, min-max (RMPC) algorithm considers time delay fault proposed. Using linear matrix inequality (LMI) technology Lyapunov...