Ductile Fe-Based Bulk Metallic Glass with Good Soft-Magnetic Properties

We report a ductile Fe-Mo-P-C-B bulk metallic glass (BMG) with good soft-magnetic properties. The Fe-Mo-P-C-B BMG with high Poisson's ratio of 0.325 and low glass transition temperature of 708 K exhibits plastic strain up to 5.5% before final failure and high fracture strength of 3280 MPa in compression. The Fe-based BMG possesses high saturation magnetization of 1.1 T, low coercive force of 1.8 Am À1 and high permeability of 55300. The Fe-Mo-P-C-B BMG with this combination of noticeable ductility, high strength and good soft-magnetic properties previously not observed simultaneously in Fe-based glassy alloys has promising potential in functional and structural applications

Adaptive Control Design for Arneodo Chaotic System with Uncertain Parameters and Input Saturation

In this paper, tracking controller and synchronization controller of the Arneodo chaotic system with uncertain parameters and input saturation are considered. An adaptive tracking control law and an adaptive synchronization control law are proposed based on backstepping and Lyapunov stability theory. The adaptive laws of the unknown parameters are derived by using the Lyapunov stability theory. To handle the effect caused by the input saturation, an auxiliary system is used to compensate the tracking error and synchronization error. The proposed adaptive tracking control and synchronization schemes ensure the effects of tracking and synchronization. Several examples have been detailed to illuminate the design procedure

Influence of surface footing loading on soil arching above multiple buried structures in transparent sand

Constructing a new buried structure nearby an existing one or constructing multiple buried structures in close proximity may change overburden stresses, induce ground movement, and affect soil–structure interaction. Such issues become more complex when these nearby buried structures are subjected to surface cyclic footing loading. Cyclic loading is expected to have different influences on the buried structures from static loading. This paper presents two-dimensional trapdoor tests with transparent soil to investigate the influences of static versus cyclic surface loading, number of trapdoors, overburden soil height, and load frequency on soil arching above single or multiple adjacent buried structures. The particle image velocimetry technique was adopted to monitor soil movements during testing. The test results showed that soil arching degraded more under cyclic loading than under static loading. The interaction of buried structures, the thin overburden soil, and the high load frequency accelerated soil arching degradation and induced larger ground surface displacement.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

Design of graphene-based multi-parameter sensors

Agricultural informatization, modernization is an important development trend of agriculture, and building low-cost agricultural sensors has become a hot topic. In this paper, a multi-parameter preparation method suitable for agricultural information technology based on graphene and its doped-modified nanocomposites is proposed. The nanomaterials such as zinc oxide, titanium dioxide, stannic oxide, and molybdenum disulfide were synthesized by hydrothermal method, combined with graphene to prepare sensors. The finally completed graphene multi-parameter sensor is suitable for the agricultural environment, the temperature measurement ranges from 10 to 60 °C, the light intensity measurement ranges from 1000 to 11,000 lux, the humidity measurement ranges from 11% to 97 %RH, and the 300–1100 ppm CO2 concentration measurement range, and the response time is short. The material used is low, cost-effective, and the measurement parameters make it a suitable agricultural sensor, which will bring a large economic and social value, lay the foundation for the agricultural sensor to meet market needs

Dye-sensitized solar cells based on Au/SnS/TiO2 sensitized by natural dye

A photoanode composed of Au/SnS/TiO2 sensitized by natural dye is designed and fabricated for dye-sensitized solar cells (DSSCs). A layer of spherical nano-TiO2 is prepared by calcination and a layer of nano-SnS is deposited on the TiO2 photoanode by the continuous ion layer adsorption reaction (SILAR). The Au nanoparticles are modified and sensitized with natural dye. The Au nanoparticles exhibit excellent localized surface plasmon resonance (LSPR) effects and enhanced the electron trapping ability. Owing to the smaller bandgap of SnS and optical activity in the infrared region, the electron mobility improves and electron recombination decreases. Electrochemical assessment reveals that the photoelectric characteristics of the DSSC based on Au/SnS/TiO2 are greatly improved after natural dye sensitization and compared with the TiO2 photoanode, the power conversion efficiency (PCE) of the DSSC improves by 105%

Advancements in electrochemical biosensing for respiratory virus detection: A review

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