Results 21 to 30 of about 2,044,415 (316)

Study on Multiparameter Precursory Information Identification of the Fracture of Yellow Sandstone

open access: yesAdvances in Civil Engineering, 2019
In order to explore the disaster caused by uncontrollable instability of coal and rock mass, a multiparameter fusion system is constructed to predict and predict disasters more accurately by identifying the mechanical and acoustic precursors of coal and ...
Xiao Fukun, Wang Houran, Liu Gang
doaj   +1 more source

Performance Comparison of Control Strategies for a Variable-Thrust Solid-Propellant Rocket Motor

open access: yesAerospace, 2022
This paper deals with a performance comparison of the control algorithm for a variable-thrust solid-propellant rocket motor (VTSRM). To do this, we develop a simulation model of a VTSRM considering characteristic changes in the combustor and design ...
Jihyoung Cha   +1 more
doaj   +1 more source

Pressure-driven batch distillation optimal control for ethanol-water separation

open access: yes, 2023
Ethanol-water separation by pressure-swing batch distillation in a double-batch rectifier system is a process under investigation. In this work, a complete global solution to the optimal control problem in the form of a sequential synthesis of controlled
Marija, Stojkovic
core   +1 more source

Cutaneous control of blood pressure [PDF]

open access: yesCurrent Opinion in Nephrology and Hypertension, 2016
Textbook theory holds that blood pressure (BP) is regulated by the brain, by blood vessels, or by the kidney. Recent evidence suggests that BP could be regulated in the skin.The skin holds a complex capillary counter current system, which controls body temperature, skin perfusion, and apparently systemic BP.
Randall S, Johnson   +2 more
openaire   +2 more sources

Experimental Study on Acoustic Emission Characteristics of Dry and Saturated Basalt Columnar Joints under Uniaxial Compression and Tensile Damage

open access: yesShock and Vibration, 2019
An experimental study was carried out to investigate the acoustic emission (AE) characteristics of dry and saturated basalt columnar joints under uniaxial compression and tensile damage by using the TAW-2000 rock experiment system and SH-IIAE system for ...
Liu Gang   +3 more
doaj   +1 more source

Practical Study for Investigation Proportional Pressure Relief Valve (DBETR-1X/25) Performance [PDF]

open access: yesEngineering and Technology Journal, 2010
The trend in hydraulic power applications is to improve efficiency andperformance of hydraulic systems parts. This paper examines the performances ofdirect operated proportional pressure relief valve type (DBETR-1X/25). There arelimitations to the closed
Majid A. Oleiwi
doaj   +1 more source

Adipokines and blood pressure control [PDF]

open access: yesCurrent Opinion in Nephrology and Hypertension, 2010
In contrast to previous understanding, adipocytes are now known to produce an array of factors collectively termed 'adipokines', several of which have effects on the cardiovascular system. The marked rise in prevalence of obesity warrants investigation into the role of adipocyte-derived factors in the regulation of blood pressure.
Frederique, Yiannikouris   +3 more
openaire   +2 more sources

Energy Evolution and Acoustic Emission Characteristics of Sandstone Specimens under Unloading Confining Pressure

open access: yesShock and Vibration, 2019
The acoustic emission characteristics of rock specimens under different initial unloading confining pressures were tested to obtain the damage and rupture characteristics of the sandstone unloading confining pressure path.
Tao Qin   +4 more
doaj   +1 more source

Load Emulation with Independent Metering for a Pump Test Bench

open access: yesActuators, 2023
For the investigation of new types of internal gear pumps under realistic conditions, a test bench is presented that enables dynamic load emulation via the pressure with simultaneous dynamic speed control of the pump.
Max Pfizenmaier   +3 more
doaj   +1 more source

Real-Time Pressure Monitoring and Control of a Hydraulic System without Sensor [PDF]

open access: yes, 2009
In a traditional hydraulic system, a pressure sensor is used to implement feedback control. However, there are many industrial cases where applications have required a pressure feedback but the media is so corrosive and/or dangerous, the sensor becomes ...
Craig Struthers   +5 more
core   +1 more source

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