Learn More
A simple and compact ultra wideband (UWB) printed monopole antenna with band-notched performance is proposed in this paper. The antenna is partially grounded so that the Q value is depressed and the impedance bandwidth is broadened. A small strip bar is loaded at the centre of the square ring radiator and the impedance bandwidth of the antenna overlapped(More)
—In general, the present China's safety production situation takes a turn for the better continually, but the situation remains harsh; it is considered that one of the important measures for preventing accidents is intensifying safety education, safety training and improving the quality of laborers. In this paper, the famous statistical software—SPSS is(More)
For better predicting and optimizing the blasting parameters in underground deep-hole mining, 16 groups of deep-hole blasting parameters are collected and collated, combining rough set and artificial neuron network theory, an optimized model for basting parameters in underground mines’ long-hole caving based on rough set and artificial neural(More)
One type of all-solid-state chloride sensor was fabricated using a MnO(2) electrode and a Ag/AgCl electrode. The potentiometric response of the sensor to chloride in synthetic concrete pore solutions was systematically studied, and the polarization performance was also evaluated. The results show a good linear relationship between the potential reading of(More)
Based on underground continuous mining technologies, it is one of the developing directions of modern underground metal mines to implement induction roof instability caving, which is used to handle mined-out area. And this mechanical instability process is a typical slow-speed time-varying boundary mechanical problem, of which the main characteristic is(More)
  • 1