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The sidewalk of Au-catalysed GaAs nanowires are studied systematically by using transmission electron microscopy. The cross-sectional shape of the VLS grown nanowires was found to consist of 3 curved surfaces along {112}A. The curved surfaces evolve into three {112}A and three {112}B facets towards the base of the nanowire due to the radial growth around the nanowire. These sidewalls transform to...
Photoconductive terahertz detectors based on single GaAs/AlGaAs core-shell nanowire have been designed and fabricated. The devices were characterised in a terahertz time-domain spectroscopy system, showing excellent sensitivity comparable to the standard bulk ion-implanted InP receiver, with a detection bandwidth of 0.1 ∼ 0.6 THz. Finite-difference time-domain simulations were performed to understand...
An Active Disturbance Rejection based solution is proposed for the position control of a standard inverted pendulum system, demonstrating a largely model independent design that is distinctly different from existing model-based designs from classical as well as modern control theory. The quality of the control loop is further improved with a unique double disturbance observer design, which rejects...
Data of power transmission and transformation in smart grid demonstrates the characteristics of big data. First of all, the article listed types of the data, introduced the source of the data and explained how to gain the data; then analyzed the characteristics of the data in aspects of volume, velocity, variety and value which were well-known in field of big data.
The modular designed by robotic platform for pluggable. The circuit module connected via CAN bus can reduce the complexity of the robot control system design and increase the reliability and flexibility. Robot platform uses a distributed circuit control structure based on the 32-bit ARM Cortex-M3 development of STM32 series chips, which could meet the actual needs by adding modules, such as wireless...
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