Showing papers by "Southwest University of Science and Technology published in 2023"
TL;DR: In this paper , a functionalized porphyrin [5,15-bis(ethynyl)- porphinato]copper(II) (CuDEP) was proposed as the stable organic cathode for organic alkali metal batteries.
5 citations
TL;DR: Wu et al. as mentioned in this paper reported the development of specific, non-covalent inhibitors of 3C-like protease (3CLpro) for the replication of SARS-CoV-2 and other coronaviruses.
Abstract: The 3C-like protease (3CLpro) is an essential enzyme for the replication of SARS-CoV-2 and other coronaviruses and thus is a target for coronavirus drug discovery. Nearly all inhibitors of coronavirus 3CLpro reported so far are covalent inhibitors. Here, we report the development of specific, noncovalent inhibitors of 3CLpro. The most potent one, WU-04, effectively blocks SARS-CoV-2 replications in human cells with EC50 values in the 10-nM range. WU-04 also inhibits the 3CLpro of SARS-CoV and MERS-CoV with high potency, indicating that it is a pan-inhibitor of coronavirus 3CLpro. WU-04 showed anti-SARS-CoV-2 activity similar to that of PF-07321332 (Nirmatrelvir) in K18-hACE2 mice when the same dose was administered orally. Thus, WU-04 is a promising drug candidate for coronavirus treatment.
3 citations
TL;DR: In this paper , a well-designed nanosphere functionalized with trimetallic Fe-Co-Ni phosphides (FCNP) was proposed to host sulfur and promote the sulfur redox reactions.
2 citations
TL;DR: Zhang et al. as mentioned in this paper analyzed the characteristics of the sulfur distribution, microbial community structure, and sulfur metabolites in shallow (10 cm), middle (30 cm), and deep (50 cm) soils in high-sulfur coal mining areas.
1 citations
TL;DR: In this paper , a hybrid affine projection algorithm (H-APA) is proposed, which is considered to be a derivation of APSA and is applied with the robust mixed norm algorithm (RMNA).
1 citations
TL;DR: In this paper , a series of plate-impact experiments were conducted using a powder gun and a two-stage light-gas gun to investigate the dynamic response of 2050-T84 Al-Li alloy under shock compression.
1 citations
TL;DR: In this paper , the sound velocity-elasticity behavior, thermodynamic properties, and mechanical behavior of the synthesized pure-phase β-Mo2C bulk ceramics were systematically investigated by in-situ high-pressure ultrasonic interferometry and theoretical calculations.
1 citations
TL;DR: In this paper , 90% loading of hexanitrohexaazaisowurtzitane (CL-20) microspheres with uniform particle sizes are precisely prepared by microfluid method, which exhibit unique hierarchical structure.
1 citations
01 Jan 2023
TL;DR: Wang et al. as discussed by the authors focused on big data technology to carry out relevant research, mainly discuss the big data of southwest minority instrumental music communication ideas, then put forward the Big Data technology system framework, synchronous analysis of the system implementation method, and finally verify the system.
Abstract: In order to better spread southwest minority instrumental music, this paper will focus on the big data technology to carry out relevant research, mainly discuss the big data of southwest minority instrumental music communication ideas, then put forward the big data technology system framework, synchronous analysis of the system implementation method, and finally verify the system. Through verification and verification, the system gives let the value of big data play out effectively, can help southwest minority instrument Ftal music to find effective transmission path, promote the better transmission of instrumental music culture, at the same time, its role is long-term, can provide communication help in different times background.
01 Jan 2023
01 Jan 2023
TL;DR: In this article , the authors investigated the properties of bubble signals under different gas injection rates and sodium-water reactions by employing a vibration-based approach and found that kurtosis was more sensitive for bubble signal recognition, while the Root Mean Square (RMS) and Standard Deviation (SD) values were more suitable for bubble positioning.
TL;DR: In this paper , the results showed that the maximum rapeseed grain yields of T2P3 were increased by 15.57% and 21.05% in 2019 and 18.02% and 32.69% in 2020 compared with those of T 2P2 and T2p4, respectively.
Abstract: Rape-rice rotation uses large amounts of phosphate fertilizers with low utilization rates and large amounts of straw. Therefore, it is necessary to establish a suitable phosphorus fertilizer application mode for straw-returning in a rape-rice rotation system. The treatments were: P application with straw return (T2) and without straw return (T1), no P application in either rapeseed season (P1), application of 120 kg·ha−1 P2O5 on rapeseed and 90 kg·ha−1 P2O5 on rice (P2), application of 120 kg·ha−1 P2O5 only on rapeseed (P3), and application of 90 kg·ha−1 P2O5 only on rice (P4). The results showed that the maximum rapeseed grain yields of T2P3 were increased by 15.57% and 21.05% in 2019 and 18.02% and 32.69% in 2020 compared with those of T2P2 and T2P4, respectively. In the rice season, the maximum yields of T2P3 increased by 17.31% and 6.67% in 2019 and 16.42% and 5.23% in 2020 compared to those of T2P2 and T2P4, respectively. Meanwhile, soil bacterial diversity reached its highest under the T2P3 and T2P2 treatments, but the difference was not statistically significant. Straw return combined with phosphorus application of 120 kg·ha−1 during rape season increased crop productivity and diversity of the soil bacterial community structure during rape-rice rotation.
TL;DR: In this article , the adsorption process of oxytetracycline and copper was studied in the laboratory with and without the presence of Cu2+ in subalpine meadows.
Abstract: Subalpine meadow soil with high moisture and humus content is a unique soil type in the Zoige Plateau. Oxytetracycline and copper are common soil contaminants which interact to form compound pollution. Oxytetracycline's adsorption on natural subalpine meadow soil and its components (humin and the soil without iron and manganese oxides) was studied in the laboratory with and without the presence of Cu2+. The effects of temperature, pH and Cu2+ concentration were documented in batch experiments, allowing deduction of the main sorption mechanisms. The adsorption process had two phases: one rapid, taking place in the first 6 h, and another slower, reaching equilibrium at around 36 h. The adsorption kinetics were pseudo-second-order, and the adsorption isotherm conformed to the Langmuir model at 25 °C. Higher concentrations oxytetracycline increased the adsorption, but higher temperature did not. The presence of Cu2+ had no effect on the equilibrium time, but the amount and rate adsorbed were much greater with Cu2+ concentration increased (except for the soil without iron and manganese oxides). The amounts adsorbed with/without Cu2+ were in the order the humin from subalpine meadow soil (7621 and 7186 μg/g) > the subalpine meadow soil (7298 and 6925 μg/g) > the soil without iron and manganese oxides (7092 and 6862 μg/g), but the difference among those adsorbents is slight. It indicates that humin is a particularly important adsorbent in the subalpine meadow soil. The amount of oxytetracycline adsorbed was greatest at pH 5–9. In addition, Surface complexation through metal bridging was the most important sorption mechanism. Cu2+ and oxytetracycline formed positively-charged complex that was adsorbed and then formed a ternary complex “adsorbent-Cu(II)-oxytetracycline”, in which Cu2+ acted as a bridge. These findings provide a good scientific basis for soil remediation, and for assessing environmental health risks.
TL;DR: In this paper , an aerial correlation filtering tracker based on scene-perceptual memory, Fast-AutoTrack, was proposed to detect tracking anomalies, such as object occlusion and camera motion, inspired by the peak sidelobe ratio and AutoTrack.
TL;DR: In this article , a closed-loop supply chain (CLSC) consisting of a manufacturer and a retailer, within which the retail channel or dual-channel sales mode is chosen for selling products while the manufacturer, retailer or hybrid recycling mode was chosen for collecting used products.
Abstract: This paper forms a closed-loop supply chain (CLSC) consisting of a manufacturer and a retailer, within which the retail channel or dual-channel sales mode is chosen for selling products while the manufacturer, retailer or hybrid recycling mode is chosen for collecting used products. Based on different sales modes and recycling modes, six-game theory models are formulated to derive the optimal pricing and recycling rate decisions. Through the model comparisons and the numerical analysis, we investigate the strategies for choosing the optimal sales mode and the optimal recycling mode. We find that the customers, the environment and the manufacturer always prefer the dual-channel sales mode. However, the retailer prefers the dual-channel (retail channel) sales mode when the discount coefficient of demand is relatively low (high). Moreover, the customers, the environment and the manufacturer prefer the hybrid (retailer) recycling mode when the competing intensity of recycling is relatively low (high). However, the retailer prefers the hybrid (retailer) recycling mode in the retail channel CLSC while preferring the hybrid (manufacturer) recycling mode in the dual-channel CLSC when the competing intensity of recycling is relatively low (high).
TL;DR: In this paper , the isothermal thermal decomposition kinetic parameters of AlH3 were calculated using Arrhenius equation and mode matching method, and it was shown that the decomposition can be divided into three stages and the time required for a certain decomposition depth at different temperatures was obtained from Semenov equation.
TL;DR: In this article , the authors combined density functional theory (DFT) calculation with a pyrolysis experiment to explore the changes in Pyrolytic gas products from oily sludge.
Abstract: Oily sludge is a kind of harmful solid waste produced by the petroleum industry. It is the key point of research to understand the mechanism of gas product changes during the pyrolysis process. This study combined density functional theory (DFT) calculation with a pyrolysis experiment to explore the changes in pyrolytic gas products from oily sludge. The results of thermogravimetric–mass spectrometry (TG–MS) and gas chromatography–mass spectrometry (GC–MS) showed that the gas products below 400°C were dominated by long-chain hydrocarbons, but with the increase of the treatment temperature, the long-chain hydrocarbons will decrease. The results of kinetics and thermodynamics showed that there were five stages of pyrolysis of oily sludge, and the values of E, ΔH, and ΔG were increased with the increase of pyrolysis temperature. The DFT calculation revealed that there were delocalized π-electrons at the fracture-prone sites, and the electrons on the functional groups of the molecule were more easily excited. The results can provide ideas for the pyrolysis mechanism of oily sludge and theoretical support for the optimization of the pyrolysis process.
TL;DR: Li et al. as discussed by the authors applied laser-induced breakdown spectroscopy (LIBS) to quantify minerals (Ca, Cu, Fe, K, Mg, Mn, and Na) in rice leaves under chromium (Cr) stress.
TL;DR: In this paper , an ECL simulation model of a soft magnetic composite (SMC) using finite element analysis in the COMSOL multiphysics software was constructed. And the authors showed that the improvement in the dynamic response characteristics of the SMC is mainly attributable to the suppression of ECL and the enhancement of soft magnetic properties.
TL;DR: In this paper , an adaptive motion control scheme for a nonholonomic spherical robot is proposed, in which an omnidirectional dynamic model is carried out by using the Euler-Lagrange method to describe the omnidirectal motion of the robot more accurately.
Abstract: Abstract Spherical robots (SRs) have the characteristics of nonholonomic constraints, underactuation, nonchain, and strong coupling, which increase the difficulty of modeling and motion control compared with traditional robots. In this study, we develop an adaptive motion control scheme for a nonholonomic SR, in which an omnidirectional dynamic model is carried out by using the Euler–Lagrange method to describe the omnidirectional motion of the SR more accurately. Furthermore, to facilitate the design of the motion controller, the dynamic model is simplified to obtain the state space expression of the SR. Aiming at the problem of poor control effect caused by the change of system model parameters which are influenced by dynamic model reduction, an adaptive motion control law of SR is designed based on MRAC. And the coefficient adjustment of the controller is obtained by the Lyapunov method, with the guaranteed stability of the closed-loop system. Finally, the controller designed in this thesis is compared with four controllers including linear quadratic regulator, Fuzzy PID, PSO-ADRC, and hierarchical SMC. The experimental comparison proves that the control scheme proposed in this study still has good control ability when the motion parameters are disturbed.
01 Jan 2023
TL;DR: In this article , the shape of zinc oxide (ZnO) nano-architectures with different morphologies was designed to improve the photocatalytic performance of the composite material and the synergistic effect of nanosheets, flower-like morphology, and oxygen vacancies.
Abstract: The low utilization of visible light and high recombination of electron-hole pairs still limit the practical application of photocatalysts. Here, cadmium sulfide (CdS) nanoparticles were selectively decorated on the highly active crystal planes of zinc oxide (ZnO) to prepare CdS/ZnO composite nanoarchitectures. We designed the CdS/ZnO nanoarchitectures with different morphologies by elaborately regulating the shape of ZnO (hexagram-like architectures, rod-like architectures, and flower-like architectures assembled by nanosheets), which effectively benefit the separation of its photogenerated electrons and holes. The nanoparticle/flower-like architecture sample exhibits excellent degradation performance, and the degradation rate for rhodamine B is 8.3 times higher compared to the pure ZnO. The excellent photocatalytic performance of the sample is benefited from the construction of the composite material, and the synergistic effect of nanosheets, flower-like morphology, and oxygen vacancies. This work may shed light on designing and synthesizing high-efficiency visible light photocatalysts to treat wastewater containing organic pollutants.
16 Feb 2023
TL;DR: In this paper , a Na3V2PO4)3/C (Ti0.1-NVP/C) composite was designed as a cathode for SIBs, which can not only stabilize the crystal structure of NVP, but also generate Na vacancies to promote Na+ diffusion and improve the intrinsic electronic conductivity.
Abstract: Na3V2(PO4)3 (NVP) is considered as a potential cathode material for next-generation sodium ion batteries (SIBs) because of its open Na+ diffusion channels and high operating voltage. In this paper, we design a Na3V1.9Ti0.1(PO4)3/C (Ti0.1-NVP/C) composite as a cathode for SIBs. Using Ti4+ to replace V3+ can not only stabilize the crystal structure of NVP, but also generate Na vacancies to promote Na+ diffusion and improve the intrinsic electronic conductivity of NVP. Meanwhile, the coated carbon layer provides a surface channel for the electron transport of NVP. More importantly, Ti-doped NVP activates additional Ti3+/Ti4+ and V4+/V5+ redox pairs. The synergistic effect of the two redox pairs makes the capacity of the Ti0.1-NVP/C electrode (123.3 mAh g–1 at 0.1 C) higher than the theoretical specific capacity of NVP. Ti0.1-NVP/C cathode also exhibits excellent rate capability (89.5 mAh g–1 at 30 C) and long cycle performance (retention of 62.3% at 20 C after 8000 cycles). Furthermore, the symmetric full cell of the Ti0.1-NVP/C electrode exhibits superior competitiveness. The reaction mechanism of the Ti0.1-NVP/C electrode is elucidated by ex-situ XRD and GITT measurements.