Anti-POLE polyclonal antibody

Many acoustic applications adopt the common-acoustical-pole and zero model while only the common acoustical poles (CAP) are needed. This paper proposes a direct method to estimate CAP solely. An approach to determine the orders of poles and zeros based on likelihood function and corrected Akaike information criterion is also given. Simulation results reveal that the estimated poles agree well with the theoretical ones. Besides, the proposed method is further evaluated with vast measured room impulse responses (RIRs) and the results show that the proposed method can accurately extract the common features of several measured RIRs. Furthermore, the result of the Monte Carlo simulation suggests that the proposed method has strong robustness against RIRs variations, and proves that the accuracy of the proposed method in estimating common poles is not a coincidence caused by special selection of measurement positions, but an inherent property. (C) 2020 Elsevier Ltd. All rights reserved.

This article presents a control methodology for a recently proposed single-stage buck-boost-type inverter in photovoltaic (PV) applications. A wide range of input voltage is covered, and the dc power is effectively converted into the grid power within a single-stage system. However, from the topological characteristics, a CL filter is always formed at the system output, which results in a resonance pole in the control system. In the PV system, the panel output voltage keeps varying. Under the traditional control method, stability issues may occur, which poses a challenge to controller design. Thus, targeting PV applications, a comprehensive control methodology is presented in this article. Under such a control scheme, a high-quality ac grid power is guaranteed and the power conversion is maintained in a stable manner. Meanwhile, the maximum power point (MPP) of PV panels is always tracked and no additional current sensor is required in the MPP tracking (MPPT) design. In this article, a detailed system analysis is presented, which includes the system modeling and the stability evaluation. The performance of the presented control methodology is experimentally verified in a 750-W PV inverter platform. Both steady state and dynamic characteristics are in good agreement with theoretical knowledge.