Hydraulic transient evaluation via fabricable impedance matrix for pipe networks

2022 ◽  
pp. 1-15
Author(s):  
Sang Hyun Kim
Keyword(s):  
Impedance Matrix ◽  
Hydraulic Transient ◽  
Pipe Networks

Leak detection of long-distance district heating pipeline: A hydraulic transient model-based approach

Energy ◽  
2021 ◽  
pp. 121604
Author(s):  
Xuejing Zheng ◽  
Fangshu Hu ◽  
Yaran Wang ◽  
Lijun Zheng ◽  
Xinyong Gao ◽  
...  
Keyword(s):  
District Heating ◽  
Leak Detection ◽  
Long Distance ◽  
Transient Model ◽  
Hydraulic Transient ◽  
Model Based

Improved MoM-PO-Based Technique for Wideband Analysis of Antennas around Large Platforms

2012 ◽  
Vol 629 ◽  
pp. 646-648
Author(s):  
Ji Ma ◽  
Shu Xi Gong ◽  
Qian Wang
Keyword(s):  
Frequency Response ◽  
Method Of Moments ◽  
Hybrid Method ◽  
Wide Band ◽  
Numerical Results ◽  
Physical Optics ◽  
Impedance Matrix ◽  
Mutual Impedance ◽  
Interpolation Technique ◽  
Matrix Interpolation

An improved wide-band analysis which combines the hybrid method of moments-physical optics (MoM-PO) formula with impedance matrix interpolation technique for antennas around large platforms is presented. The algorithm proposed in this paper interpolated the mutual impedance matrix between MoM and PO regions rather than the MoM self-matrix. This practice can result in more accurate frequency response than the conventional approach. Sample numerical results demonstrate the capability of the algorithm.

Power Fluidics—Amplifying Properties of Specially Designed Junctions

1977 ◽  
Vol 10 (4) ◽  
pp. 147-154 ◽  
Author(s):  
J. R. Tippetts
Keyword(s):  
Equivalent Circuit ◽  
Reverse Flow ◽  
Signal Power ◽  
Impedance Matrix ◽  
Power Gain ◽  
Large Signal ◽  
Circle Diagram ◽  
Flow Diverters

Specially designed 3-terminal elements called flow-junctions (FJs) and ‘reverse flow diverters' (RFDs) are shown to have useful amplifying properties which are often unrecognised. These are described by relating the devices to ideal network elements using an indefinite circle diagram. The FJ is useful between two transformer-like states and at the mid-point of this range its utility is described by its impedance matrix. A circuit using an RFD is shown to give a large-signal power gain which compares favourably with an equivalent circuit using a vortex device.

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