scholarly journals A revision of distribution and historical analysis of preferred hosts of Orobanche ramosa (Orobanchaceae) in Poland

2012 ◽  
Vol 65 (1) ◽  
pp. 53-62 ◽  
Author(s):  
Renata Piwowarczyk
Keyword(s):  
Habitat Preferences ◽  
Historical Analysis ◽  
Control Methods ◽  
Orobanche Ramosa ◽  
New Localities ◽  
And Control ◽  
Preferred Hosts

The Polish localities of <i>Orobanche ramosa</i> L., branched broomrape, are either extinct or have not been confirmed for many years. This paper presents two new localities of <i>O. ramosa</i> in Poland from the Płaskowyż Proszowicki plateau (Wyżyna Małopolska upland) and the Nizina Nadwiślańska lowland (Kotlina Sandomierska basin). Habitat preferences and the abundance at the sites are described. A revised map of the distribution and a historical analysis of preferred hosts in Poland are included. The taxonomy, biology, ecology and control methods of <i>O. ramosa</i> are also discussed.

Cooperative ship formation system and control methods in the ship lock waterway

2021 ◽  
Vol 226 ◽  
pp. 108826
Author(s):  
Chenguang Liu ◽  
Junlin Qi ◽  
Xiumin Chu ◽  
Mao Zheng ◽  
Wei He
Keyword(s):  
Control Methods ◽  
And Control ◽  
Formation System ◽  
Ship Lock

scholarly journals Research on influence factors and control methods of backfill compactness

2021 ◽  
Vol 787 (1) ◽  
pp. 012027
Author(s):  
Yudian Li ◽  
Jiajie Dong ◽  
Kai Fei ◽  
Hao Song ◽  
Zeyi Li ◽  
...  
Keyword(s):  
Influence Factors ◽  
Control Methods ◽  
And Control

scholarly journals Characterisation and Control of a Woven Biomimetic Actuator for Wearable Neurorehabilitative Devices

Actuators ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 37
Author(s):  
Vaughan Murphy ◽  
Brandon P. R. Edmonds ◽  
Ana Luisa Trejos
Keyword(s):  
Performance Metrics ◽  
Woven Fabric ◽  
Total Force ◽  
Control Methods ◽  
Soft Actuator ◽  
Sewing Thread ◽  
And Control ◽  
Fabric Mesh ◽  
Biomimetic Actuator ◽  
Multiple Units

Twisted coiled actuators (TCAs) are a type of soft actuator made from polymer fibres such as nylon sewing thread. As they provide motion in a compact, lightweight, and flexible package, they provide a solution to the actuation of wearable mechatronic devices for motion assistance. Their limitation is that they provide low total force, requiring them to actuate in parallel with multiple units. Previous literature has shown that the force and stroke production can be improved by incorporating them into fabric meshes. A fabric mesh could also improve the contraction efficiency, strain rate, and user comfort. Therefore, this study focused on measuring these performance metrics for a set of TCAs embedded into a woven fabric mesh. The experimental results show that the stroke of the actuators scaled linearly with the number of activated TCAs, achieving a maximum applied force of 11.28 N, a maximum stroke of 12.23%, and an efficiency of 1.8%. Additionally, two control methods were developed and evaluated, resulting in low overshoot and steady-state error. These results indicate that the designed actuators are viable for use in wearable mechatronic devices, since they can scale to meet different requirements, while being able to be accurately controlled with minimal additional components.

scholarly journals Resonance Instability of Photovoltaic E-Bike Charging Stations: Control Parameters Analysis, Modeling and Experiment

2019 ◽  
Vol 9 (2) ◽  
pp. 252 ◽  
Author(s):  
Ziqian Zhang ◽  
Cihan Gercek ◽  
Herwig Renner ◽  
Angèle Reinders ◽  
Lothar Fickert
Keyword(s):  
Major Effect ◽  
Current Control ◽  
Current Loop ◽  
Control Methods ◽  
Control Parameters ◽  
Charging System ◽  
Grid Connected Inverter ◽  
The Time Domain ◽  
Charging Stations ◽  
And Control

This article presents an in-situ comparative analysis and power quality tests of a newly developed photovoltaic charging system for e-bikes. The various control methods of the inverter are modeled and a single-phase grid-connected inverter is tested under different conditions. Models are constituted for two current control methods; the proportional resonance and the synchronous rotating frames. In order to determine the influence of the control parameters, the system is analyzed analytically in the time domain as well as in the frequency domain by simulation. The tests indicated the resonance instability of the photovoltaic inverter. The passivity impedance-based stability criterion is applied in order to analyze the phenomenon of resonance instability. In conclusion, the phase-locked loop (PLL) bandwidth and control parameters of the current loop have a major effect on the output admittance of the inverter, which should be adjusted to make the system stable.

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