Knowing source number correctly is the precondition for most spatial spectrum estimation methods; however, Gloves many snapshots are needed when we determine number of wideband signals.Therefore, a new method based on Bootstrap resampling is proposed in this paper.First, signals are divided into some nonoverlapping subbands; apply coherent signal m

To take single-phase PWM rectifier as AFE of cascaded H-bridge multi-level frequency converter can satisfy requirement that electric drive system of coal mine hoist must have capacity of bidirectional energy flowing, but there are third harmonic in its AC-side current because 3d target of the second ripple of output voltage.To slove the problem, a

Large-size diffraction gratings have played an important role in modern scientific fields such as inertial confinement fusion, large-aperture astronomical telescopes, and Upper Console Cover high-precision immersion lithography machines with long-stroke displacement stages.However, due to the large size and high accuracy requirements of gratings, a

Abstract The issues that will be examined in this article relate to the vagueness of norms in Article 19 paragraph (1) and paragraph (2) in conjunction with Article 55 of the BPJS Law.The confusion of norms occurs because there are no clear boundaries regarding the elements in the article so that in practice there is some information that can be pr