Results 81 to 90 of about 3,738,904 (156)

Distributed Small-Signal Equivalent Circuit Model and Parameter Extraction for SiGe HBT

IEEE Access, 2019
In this paper, we present an improved high frequency small-signal distributed model for SiGe HBTs under forward-active mode based on the transmission line theory.
Yabin Sun, Ziyu Liu, Xiaojin Li, Yanling Shi   +3 more
doaj   +1 more source

Optimizing signal-to-error ratio in standing wave ultrasonic measurements [PDF]

Standing wave ultrasonic techniques for the measurement of very small changes in acoustic attenuation and phase velocity are discussed. Enhanced sensitivity to these small changes was achieved by making the specimen part of a composite ultrasonic ...
Brown, J. J., Miller, J. G., Stubblefield, V. E.   +2 more
core   +1 more source

Secondary CMB anisotropies in a universe reionized in patches

, 1998
In a universe reionized in patches, the Doppler effect from Thomson scattering off free electrons generates secondary cosmic microwave background (CMB) anisotropies.
Aghanim N., Andrei Gruzinov, Bond J. R., Hu W., Silk J., Sunyaev R. A., Wayne Hu   +6 more
core   +2 more sources

Description Length Based Signal Detection in singular Spectrum Analysis [PDF]

This paper provides an information theoretic analysis of the signal-noise separation problem in Singular Spectrum Analysis. We present a signal-plus-noise model based on the Karhunen-Loève expansion and use this model to motivate the construction of a ...
D.S. Poskitt, Md Atikur Rahman Khan
core  

Research on a Small Signal Stability Region Boundary Model of the Interconnected Power System with Large-Scale Wind Power

Energies, 2015
For the interconnected power system with large-scale wind power, the problem of the small signal stability has become the bottleneck of restricting the sending-out of wind power as well as the security and stability of the whole power system. Around this
Wenying Liu, Rundong Ge, Quancheng Lv, Huiyong Li, Jiangbei Ge   +4 more
doaj   +1 more source

Temperature dependence of optically dumped far-infrared (FIR) laser output power [PDF]

The temperature dependence of the small signal gain and saturation power are derived using temperature-dependent rates in a four-level model. An expression is developed for the output power of a far-infrared oscillator as a function of temperature for ...
Lawandy, N. M.
core   +1 more source

Stability Analysis and Active Damping Design for Grid-Forming Converters in LC Resonant Grids

IEEE Open Journal of the Industrial Electronics Society
In this article, a small-signal model of grid-forming (GFM) converters that takes into account the presence of ac shunt capacitors in the power grid is presented.
SHIYI LIU, Heng Wu, Xiongfei Wang, Theo Bosma, Ganesh Sauba   +4 more
doaj   +1 more source

A Switched-Coupled-Inductor Quasi-Z-Source Network With High Boost Capability

IEEE Access
This paper proposes a new high gain quasi-Z-source network (qZSN) using a two-winding switched-coupled-inductor (SCL). By employing a two-winding SCL within the impedance network, the proposed topology offers high boost capability at low shoot-through ...
Mehran Moslehi Bajestan, Hamed Bizhani
doaj   +1 more source

High-Precision Small-Signal Model for Double-Channel-High-Electron-Mobility Transistors Based on the Double-Channel Coupling Effect. [PDF]

Micromachines (Basel)
Zhao Z, Yu Q, Lu Y, Yi C, Liu X, Feng T, Zhao W, Chen Y, Yang L, Ma X, Hao Y.   +10 more
europepmc   +1 more source

Simultaneous measurement of water transport across the blood-brain and blood-CSF barrier in the human brain with arterial spin labeling MRI. [PDF]

J Cereb Blood Flow Metab
Petitclerc L, Durrant H, Hirschler L, Václavů L, van Osch MJP.   +4 more
europepmc   +1 more source