Synaptic Transistors In article 2208497, Haifeng Ling, Linghai Xie, Wei Huang, and co‐workers propose a wavelength‐aware reconfigurable synaptic transistor for visuomorphic computing. Based on the broadband absorption of Zr‐CsPbI3 perovskite nanocrystals, reconfigurability between short‐term plasticity and long‐term plasticity for the device is realized. A vision sensor array is constructed to simulate image pre‐processing and recognition with a homogeneous architecture.

The spinning triangle is a critical region in ring spinning. To understand the formation principle of the triangle zone, a dynamic mesh model with SIMPLEC algorithm is employed to study airflow around the rotating front roller-pair. The effects of both the top roller offset and the drafting inclination angle are also discussed. The bubble-type vortex breakdown and vortices around two cylinders are observed. The bubble-type vortices will help the edge fibers to converge to the center. A contour line with special value is defined to describe the spinning triangle. A dynamic triangle zone is also observed with time. As the forward offset of the top roller increases, the velocities in the stream-wise ( x- and y-) directions decrease and the maximum values of the skin friction deflect gradually towards the apex of the roller. However, the z-velocity for the 3 mm top roller offset is the largest and results in a good converging for fibers and, consequently, increases the yarn tension. With increasing the inclination angle, the velocities increase while both the defined triangle zones and the maximum values of the friction coefficients decrease, thus speeding up the fibers transportation. The simulation results agree well with the theory analysis and experiments of spinning.

Polymer composites have been widely used in the aviation, aerospace, automotive, military, medical, agricultural and industrial fields due to their excellent mechanical properties, heat resistance, flame retardant, impact resistance and corrosion resistance. In general, their manufacturing process is one of the key factors affecting the life cycle of polymer composites. This article provides an overview of typical manufacturing technologies, including surface coating, additive manufacturing and magnetic pulse powder compaction, which are normally used to reduce the failure behaviour of polymer composites in service so that the quality of composite products can be improved. Advanced polymer composite powder manufacturing processes, the processing mechanism and experimental methods are described, and the influence of different manufacturing processes on the moulding quality is revealed. This investigation can provide suitable methods for the selection of manufacturing technology to improve the quality of polymer composite products.

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