Results 81 to 90 of about 94,849 (390)
IEEE Access, 2018 To achieve more precise positioning of the electronic throttle plate, a nonlinear backstepping tracking control strategy is presented in this paper. In contrast to the existing control schemes for electronic throttles, the input saturation and unknown ...
Bai Rui, Yu Yang, Wang Wei
semanticscholar +1 more source
A stepwise emergence of evolution in the RNA world
FEBS Letters, EarlyView.How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley +1 more source
Throttling Performance and Structural Analysis of UHP Wellhead Throttle Valve
Shiyou jixieThe throttle valve， as an ultra-high pressure （UHP） wellhead device， is susceptible to erosion failure. This paper proposes the designs of spool and anti-sprint protection sleeve for double-wedge throttle valve， and analyzes the flow field ...
Zhou Tianming +4 more
doaj +1 more source
Quantification of the Lifetime and Reliability of Dual-Mode Ion Thrusters
Journal of Aerospace Technology and Management, 2022 An approach to quantify the lifetime and reliability of dual-mode ion thruster is presented based on coupling analyses of thruster failure modes, throttle levels, life models, input uncertainties, and throttle profiles.
Xueer Zhang, Tianping Zhang, Detian Li
doaj
Precision control system for engine fuel [PDF]
, 1970 System controls two or more pneumatically operated metering valves from common pneumatic source without interaction between valve controls. Unit affords independent metering of liquid from single source to two concurrent applications.
Hawkins, D. E.
core +1 more source
FEBS Letters, EarlyView.B cells sense external mechanical forces and convert them into biochemical signals through mechanotransduction. Understanding how malignant B cells respond to physical stimuli represents a groundbreaking area of research. This review examines the key mechano‐related molecules and pathways in B lymphocytes, highlights the most relevant techniques to ...
Marta Sampietro +2 more
wiley +1 more source
Study on the effect of the pressure characteristics of the cone throttle on the cavitation
The Journal of Engineering, 2018 According to the cone-type throttle valve is prone to cavitation, resulting in the reduction in the performance of the cone throttle valve. Here, a visual experimental platform for hydraulic cavitation is built, and the cavitation number of the conical ...
Jian Zhang +3 more
doaj +1 more source
Improvements in petrol engine performance with ultrasonic fuel atomisation [PDF]
, 1966 Initial studies of the effect of air-fuel mixture preparation on piston engine performance have been conducted on a four cylinder 1600 cc petrol engine using conventional carburation and ultrasonic fuel atomisation.
Norster, E. R.
core
Asymmetric modelling and control of an electronic throttle [PDF]
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2015 SummaryThis paper presents an improved model for an automotive electronic throttle inspired on the behaviour observed in real‐time experiments. Due to a number of issues, particularly the return‐spring, the performance of the throttle valve depends on whether it is opening or closing.
Pujol Vázquez, Gisela +3 more
openaire +4 more sources
Evolutionary interplay between viruses and R‐loops
FEBS Letters, EarlyView.Viruses interact with specialized nucleic acid structures called R‐loops to influence host transcription, epigenetic states, latency, and immune evasion. This Perspective examines the roles of R‐loops in viral replication, integration, and silencing, and how viruses co‐opt or avoid these structures.
Zsolt Karányi +4 more
wiley +1 more source