Construction of College English Mobile Learning Model Based on Distributed Terminal

The quality of English teaching cannot be separated from the students’s accumulation and mastery of vocabulary, and sufficient vocabulary can ensure that students feel easy and comfortable in the language application. However, there are still some problems in teaching English vocabulary in colleges and universities, such as single presentation method, lack of real context, and other difficulties. With the rapid development of mobile Internet, the share of smart mobile devices among college students has increased, which in turn has laid the foundation for the development of new learning modes. The mobile terminal-mediated learning mode in English classroom teaching has become a hot topic of research nowadays, of which English vocabulary teaching has become a typical example. This paper is designed as a system model of edge computing, in which the user terminal device can connect wirelessly with each MECS and offload the tasks to be processed on the MECS, which helps the user terminal device to process and return the results to the user terminal device. The research in this paper also provides a basis for students’ independent and lifelong learning of English words and for schools’ information technology to serve English vocabulary teaching and learning.

Synthesis of a terminal device of a multiplex data exchange channel to FPGA

The article presents a technology for developing a terminal device for a multiplexed serial interface for data exchange to FPGA. The development was carried out using the System Verilog hardware description language. To meet demanding requirements. presented to this interface in terms of transmission speed, as well as the duration of transmitted and received bits of information, the device includes a built-in signal duration analyzer, which can also be used to exclude the influence of a part of the impulse noise that “leaked” through the input high-pass filter. The presented device has passed the verification of the main operating modes in the ModelSim-Altera software environment.

Reversible 100 mA Current Switching in a VO2/Al2O3-Based Two-Terminal Device Using Focused Far-Infrared Laser Pulses

In this study, we implemented reversible current switching (RCS) of 100 mA in a two-terminal device based on a vanadium dioxide (VO2) thin film, which could be controlled by far-infrared (FIR) laser pulses. The VO2 thin films used for fabrication of two-terminal devices were grown on sapphire (Al2O3) substrates using a pulsed laser deposition method. An optimal deposition condition was determined by analyzing the resistance-temperature curves of deposited VO2 thin films and the current–voltage characteristics of two-terminal devices based on these films, which were suggested in our previous works. The film surface of the VO2-based device was directly irradiated using focused CO2 laser pulses, and the insulator-metal transition or metal-insulator transition of the VO2 thin film could be triggered depending on laser irradiation. Consequently, RCS of up to 100 mA could be accomplished. This on-state current is close to the upper limit of the current flowing through our VO2 device. The switching contrast, defined as the ratio between on-state and off-state currents, was evaluated and found to be ˜11,962. The average rising and falling times of the switched current were found to be ˜29.2 and ˜71.7 ms, respectively. In comparison with our previous work, the improved heat dissipation structure and the high-quality thin film could maintain the switching contrast at a similar level, although the on-state current was increased by about two times.

Thin-Film Transistors for Emerging Neuromorphic Electronics: Fundamentals, Materials, and Pattern Recognition

The main goal of the field of neuromorphic electronics is to develop novel microelectronic components that emulate the memory and computing functionalities of the biological synapse. As a three-terminal device,...

Electrically controlled spin reversal and spin polarization of electronic transport in nanoporous graphene nanoribbons

Based on first-principles calculations, the spin-dependent electronic transport of nanoporous graphene nanoribbons is investigated. A three-terminal device is proposed, which can electronically control the spin polarization of transmission, instead of...