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According to the requirements of loading and unloading of safety valve, an automatic guide vehicle for safety valve handling is designed. Aiming at the established mechanical model of in-situ steering of truck, the simulation analysis of virtual prototype is carried out by using ADAMS simulation software. The steering motion under different wheel ground friction coefficient, steering acceleration time and eccentricity is simulated for many times. Based on the simulation curve of rotation center displacement and discrete points of relative displacement value in three-dimensional space, the uncertainty is compared and analyzed The simulation results and prototype tests verify the correctness of the theoretical analysis, which provides a basis for the optimization of the mechanical structure and the design of the control system of the carrier.

In the present work, LDHs-derived Ni–Al nanosheet arrays (NiAl/NA) were successfully synthesized via a one-step hydrothermal method, and applied in the steam-reforming of glycerol reaction for enhanced and stable hydrogen production. The physicochemical properties of catalysts were characterized using various techniques, including XRD, SEM–EDS, XPS, N2-physisorption, Raman, and TG–DTG. The results indicate that smooth and cross-linked Ni–Al mixed metal oxide nanosheets were orderly and perpendicularly grown on the Ni foam substrate. The SEM line scan characterization reveals the metal concentration gradient from the bottom to the top of nanosheet, which leads to distinctly optimized Ni valence states and an optimized binding strength to oxygen species. Owing to the improved reducibility and more exposed active sites afforded by its array structures, the NiAl/NA catalyst shows enhanced glycerol conversion (83.1%) and a higher H2 yield (85.4%), as well as longer stability (1000 min), compared to the traditional Ni–Al nanosheet powder. According to the characterization results of spent catalysts and to density functional theory (DFT) calculations, coke deposition is effectively suppressed via array construction, with only 1.25 wt.% of amorphous carbons formed on NiAl/NA catalyst via CO disproportionation. [ABSTRACT FROM AUTHOR]

The efficient utilization of lignin remains a great challenge due to its complex nonrepetitive structure and the lack of efficient catalyst. Herein, a single‐atom catalyst Ni@N‐C was designed via a facile chelation‐anchored strategy. Ni atoms were immobilized on the N‐doped carbon carrier by a two‐stage pyrolysis of a mixture of d‐glucosamine hydrochloride, nickel acetate, and melamine. d‐glucosamine hydrochloride as a chelating agent prevented the aggregation of Ni2+, and melamine provided enough N to anchor Ni by forming Ni–N4 structure. Ni@N‐C gave a 31.2% yield of aromatic compounds from lignin hydrogenolysis, which was twice higher than that achieved by Ni cluster catalyst. Based on the experimental and density functional theory (DFT) calculation results, the higher activity of Ni@N‐C was attributed to its lower H2 dissociation energy and the reduced energy barriers of the transition states. The strategy described opens an efficient green avenue for preparing single‐atom catalyst that possesses outstanding activity in lignin depolymerization. [ABSTRACT FROM AUTHOR]

Secondary doping has a long history of use in conductivity enhancement in poly(3,4‐ethylenedioxythiophene) : poly(styrene sulfonate) (PEDOT : PSS). However, very little research has addressed its detrimental effect on application performance of PEDOT : PSS in organic solar cells. Herein, it was shown that the uneven drying of secondary dopant‐water mixture results in a nonuniform/continuous film structure, causing severe damage to the device efficiencies (dropping about 8 and 23 % for poly[(2,6‐(4,8‐bis(5‐(2‐ethylhexyl)thiophen‐2‐yl)‐benzo[1,2‐b:4,5‐b']dithiophene))‐alt‐(5,5‐(1',3'‐di‐2‐thienyl‐5',7'‐bis(2‐ethylhexyl)benzo[1',2'‐c:4',5'‐c']dithiophene‐4,8‐dione))] (PBDB‐T) : 3,9‐bis(2‐methylene‐(3‐(1,1‐dicyanomethylene)‐indanone))‐5,5,11,11‐tetrakis(4‐hexylphenyl)‐dithieno[2,3‐d:2',3'‐d']‐s‐indaceno[1,2‐b:5,6‐b']dithiophene (ITIC) and poly[(2,6‐(4,8‐bis(5‐(2‐ethylhexyl)‐4‐fluorothiophen‐2‐yl)benzo[1,2‐b:4,5‐b′]dithio‐phene))‐co‐(1,3‐di(5‐thiophene‐2‐yl)‐5,7‐bis(2‐ethylhexyl)‐benzo[1,2‐c:4,5‐c′]dithiophene‐4,8‐dione))](PM6) : (3,9‐bis(1‐oxo‐2‐methylene‐3‐(1,1‐dicyanomethylene)‐5,6‐difluoroindanone)‐5,5,11,11‐tetrakis(4‐n‐hexylphenyl)‐dithieno[2,3d:2′,3′d′]‐s‐indaceno[1,2b:5,6b']dithiophene (IT‐4F) cells, respectively) and thermal stabilities. Moreover, a simple yet robust dialysis treatment was proposed to solve the issue of noncontinuity and retain the secondary doping's advantages of quinoid structure simultaneously, thus demonstrating a significant enhancement in device performance. This study will be of great importance to the future exploration of the next generation of post‐treatment strategy. [ABSTRACT FROM AUTHOR]

In order to further improve the automation level of safety valve feeding, the research group proposed a safety valve automatic loading car which can independently complete the loading work. The dynamic state of the lifting mechanism of the loading car has a great influence on its motion and stability during the loading process. Therefore, it is necessary to carry out dynamic analysis on the lifting mechanism of the loading car. Firstly, the complex rigid body was simplified, and the simplified three-dimensional model of the loading car was established by using SolidWorks software; secondly, the dynamic equation was established by Lagrange method; Finally, the three-dimensional model was imported into Adams for dynamic simulation analysis, and the curves of motor driving torque, screw force and sliding shaft bearing friction force were obtained. The results show that the lifting mechanism of the loading car has high reliability and stability in the process of movement. The research provides a reference for the selection and manufacture of the main parts of the lifting mechanism. [ABSTRACT FROM AUTHOR]