Results 11 to 20 of about 936,726 (264)

Vertical Nanoscale Vacuum Channel Triodes Based on the Material System of Vacuum Electronics

open access: yesMicromachines, 2023
Nanoscale vacuum channel triodes realize the vacuum-like transmission of electrons in the atmosphere because the transmission distance is less than the mean free path of electrons in air.
Panyang Han   +3 more
doaj   +6 more sources

Primary observations of solar filaments using the multi-channel imaging system of the New Vacuum Solar Telescope [PDF]

open access: yesProceedings of the International Astronomical Union, 2013
AbstractThe New Vacuum Solar Telescope (NVST) is a new generation ground-based solar facility of China. One of the post-focus instruments is the multi-channel high-resolution imaging system, which is designed to simultaneously observe the dynamic gas motion in the solar photosphere and chromosphere.
Zhi Xu   +3 more
openaire   +2 more sources

Physical characteristics analysis and performance comparison of membranes for vacuum membrane dehumidifiers

open access: yesCase Studies in Thermal Engineering, 2021
The present study pertains to an experimental measurement investigation of membrane physical properties for vacuum membrane dehumidifiers. The membrane material used in an air dehumidification system is a key role for the dehumidification efficiency.
Chun-Han Li   +4 more
doaj   +2 more sources

The clinical efficacy of novel semirigid ureteroscopy with a vacuum suction device for treatment of >10 mm upper ureteral stones and impacted calculus: implications for clinical practice [PDF]

open access: yesFrontiers in Surgery
ObjectiveThe novel semirigid ureteroscopy with a vacuum suction device has been increasing in the treatment of urinary stones recently. This study aimed to evaluate its clinical efficacy for treating >10 mm upper ureteral stones and impacted calculus ...
Longhui Lai   +22 more
doaj   +2 more sources

Formation and Eruption of a Hot Channel Magnetic Flux Rope in a Nested Double Null Magnetic System

open access: yesThe Astrophysical Journal Letters
The coronal magnetic topology significantly affects the outcome of magnetic flux rope (MFR) eruptions. The recently reported nested double null magnetic system remains unclear as to how it affects MFR eruptions.
Surui Yao   +4 more
doaj   +2 more sources

Advanced reusable SAW-based particulate matter sensor with microheater and porous microstructured filter membrane for simultaneous PM10 and PM2.5 detection [PDF]

open access: yesMicrosystems & Nanoengineering
In this study, we present a novel reusable surface acoustic wave (SAW)-based particulate matter (PM) sensor system capable of simultaneously and selectively detecting PM10 and PM2.5. This is the first implementation of an integrated porous microstructure
Faisal Nawaz   +2 more
doaj   +2 more sources

Designing of control and expulsion equipment for the pitot-static system of passenger airplanes

open access: yesВестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2021
The article discusses the issue of automating the serial process of bleeding and control of the pitot- static system of passenger airplanes. A functional diagram and basic design of some parts of the combined equipment are proposed.
N. A. Zotin, E. P. Lisman
doaj   +1 more source

New Q and V-band ECE radiometer for low magnetic field operation on LHD [PDF]

open access: yesEPJ Web of Conferences, 2023
To meet the demand for information on electron temperature fluctuations in low magnetic field experiments in the Large Helical Device (LHD), a new ECE radiometer covering the Q and V bands has been installed.
Tokuzawa Tokihiko   +4 more
doaj   +1 more source

Numerical Simulation of Transient Characteristics of Start-Up Transition Process of Large Vertical Siphon Axial Flow Pump Station

open access: yesFrontiers in Energy Research, 2021
In order to explore the transient characteristics of the large-scale vertical siphon axial flow pumping station during the start-up and exhaust process, numerical simulations were carried out on the start-up process of the axial flow pumping station ...
Xiaowen Zhang   +6 more
doaj   +1 more source

Development of Multi Sample Array System Based on Pneumatic Valve [PDF]

open access: yes한국정밀공학회지, 2017
We present a multi-sample array device based on a pneumatic system. Solenoid valves were used to control a micro valve in a pneumatic system. The use of a compressor together with a vacuum pump ensured that one outlet could supply both compression and ...
Chul Min Kim, Seo Jung Park, Gyu Man Kim
doaj   +1 more source

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