Abstract Moiré effect is a common phenomenon that arises from slight mismatch in the period of two structures. A prominent example microscopic world magic-angle twisted bilayer graphene (MATBG). In this work, to enhance undergraduate students' advanced learning interference and diffraction, we reproduced structure MATBG on macroscopic scale by creating hexagonal structured masks. By designing suitable optical path, were able realize diffraction macrostructure. The results revealed additional...

The aerial atomizer is the most essential component of plant protection UAV (unmanned vehicle). However, structural optimization existing atomizers lacks comprehensive consideration spray parameters and parameters, there a shortage available models, resulting in unstable effect application. In our previous work, an dual-atomization centrifugal was developed. order to obtain with good atomization its model, at different rotation speeds flow rates atomizer, performance, are studied this paper....

A vibration ditching machine is a that can effectively reduce resistance and energy consumption. In this paper, taking self-developed, self-excited as the research object, we explore its internal dynamic characteristics upon excitement when ditching, which reduces The of with three degrees freedom (Y, Ry, Rx directions), are generated by machine, evaluated; rotating speed, spring stiffness, damping coefficient, blade weight taken factors, their effects on analyzed an Adams–Edem coupling...

The measurement of banana pseudo-stem phenotypic parameters is a critical way to evaluate the growth status bananas, and it can provide essential data support for mechanized cultivation operations such as fertilization pesticide application. Existing studies mainly measure diameter its parameter. cross section was closer an ellipse other than standard circle, so parameter cannot adequately represent characteristics plant. In this study, automatic measuring device developed. device, which...

The quality of heavy-duty machine tool foundations can drastically affect the operating life and working precision tool, high cost manufacture has drawn a lot attention. This article summarized research status relevant literature on characteristics, vibration isolation, foundation optimization, inspection tool-foundation system, induced influencing laws factors reviewed highlights achievements in heavy system at present, put forward some problems development directions existing system. It...

The application of Wireless Power Transmission (WPT) has attracted more and attention, but the energy efficiency cannot be high due to inevitable loss. Energy efficient WPT is increasingly demanded especially in implantable devices their wireless inefficiency nature. In addition, many include digital circuits such as a Microcontroller Unit (MCU) which supply voltage may fluctuate severely with driving clock switches between ground (Gnd) (Vdd), since power transmitted wirelessly limited,...

For the biomedical transceiver, data transmission is often asymmetric. At downlink, transceiver only needs to receive a simple command control operation of external device, and receiving rate low, about hundreds Kb/s. However, collected by devices such as temperature sensors, pressure or cameras are very large, which results in transmitting several Mb/s. Therefore, high energy-efficient modulator needed. Compared with conventional digital modulator, analog circuits have demonstrated superior...

In this article, an ohmic-first AlGaN/GaN self-terminating gate-recess etching technique was demonstrated where ohmic contact formation is ahead of gate-recess-etching/gate-dielectric-deposition (GRE/GDD) process. The exhibits few degradations after the Besides, when comparing with that using conventional fabrication process, fabricated device process shows a better gate dielectric quality in terms more than 3 orders lower forward leakage current, twice higher reverse breakdown voltage as...

Abstract This work demonstrates for the first time feasibility of computed tomography (CT) reconstructions pollutant concentrations in a real room setting. A remote sensing Fourier transform infrared spectrometer was mounted on moving base controlled ventilation chamber. passive tracer released from point source into under constant conditions. series experiments gathered multiple path-averaged measurements two-dimensional plane CT reconstruction. Simultaneous readings were with...

With the continuous expansion of distribution network, resulting in a large amount running data.The integration Realtime Database and network system make it prossible to record holographic scalar measurement data.This paper studied deep system.On basis integration, we health diagnosis method power equipment carry out in-depth data mining on history model information.The state evaluation are established by cluster analysis, linear regression algorithm entropy method, fault assessment early...

With the development of integrated circuits, miniaturized implantable devices have been proven a prospective treatment in clinics. As these need to acquire weak bio-signals, ability reject power ripple noise-sensitive analog front-end is highly demanded. This paper presents an energy efficient low dropout regulator biomedical devices. The proposed circuit comprises conventional topology while adding simple yet effective branch overcome limitation supply rejection ratio. LDO utilizes internal...

In this paper, new pMTJ that shows reliable unipolar switching, since the free layer has strong perpendicular anisotropy and well oriented magnetization, same as in a typical designed for STT-MRAM application, switching of 1D-1MTJ architecture MRAM may be achieved application extreme densities . presentation, we will demonstrate from these devices present our study physics process behind such intriguing behavior

In order to design a high-power ICP (Inductive Coupled Plasma) RF power supply and verify its correctness, class E amplifier circuit an automatic impedance matching are built in Simulink. The analysis of the results shows that Class this paper can meet requirements, algorithm achieve maximum output by adjusting value network components. This simulation based on Simulink simulates load changes during operation correctness algorithm.

We have studied the optical properties of ultraviolet detector based on GaN epilayer grown 6H-SiC substrate by metalorganic chemical vapor deposition. obtained detectable energy span device up to photocurrent measurement. The spectral responsivity remained nearly constant for wavelengths from 250 365 nm and dropped three orders magnitude within 10 band edge (by 380 nm). was measured a 133 A/W at wavelength 360 under 5-V bias, voltage-dependent performed. Furthermore, an easy method developed...