Results 21 to 30 of about 17,024 (254)

Innovation tools of economic development of the enterprise [PDF]

open access: yesЭкономика региона, 2012
Ways to generate new economic and financial benefits from the practice of rationalization work in the industrial enterprise are considered. An attempt to combine the practice rationalization work with the capabilities of tools and techniques of the ...
Fedor Pavlovich Zotov   +1 more
doaj   +1 more source

Experimental and Numerical Investigation of Tip Leakage Flows in a Roots Blower

open access: yesDesigns, 2020
Computational fluid dynamics (CFD) can help in understanding the nature of leakage flow phenomena inside the rotary positive displacement machines (PDMs).
Shuaihui Sun   +3 more
doaj   +1 more source

Comparative analysis of single-stage reciprocating compressor compressing different gases [PDF]

open access: yesОмский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2019
Ensuring the efficient and reliable operation of reciprocating compressors is an important issue. The quality of the designed equipment is determined by the level of knowledge of the object and the perfection of methods for calculating its state.
A. A. Kotlov, A. B. Burakov
doaj   +1 more source

A New Dynamic Balance Framework Based on Blind Source Separation under Multiple Fault Conditions

open access: yesShock and Vibration, 2022
Accordingly, the mass unbalance of the rotors is usually the major cause of excessive vibration. The information extracted at the fundamental frequency is often employed to fix the unbalance issue.
Bo Lang   +4 more
doaj   +1 more source

Study of Parallel Compressor System and Real-Time Simulation Based on Modular Dynamic System Greitzer Modeling

open access: yesMachines, 2023
The compressor system is widely used in aerospace, chemical industry, and other industrial fields. Modeling a compressor system is of great significance to the study of hydrodynamics and surge characteristics.
Yang Su   +4 more
doaj   +1 more source

Application of domestic motor-driven centrifugal compressor unit in natural gas pipeline

open access: yesYou-qi chuyun, 2021
Motor-driven centrifugal compressor unit has been widely installed in the compressor station of natural gas pipeline in recent years. Motor-driven compressor unit industry of China starts late but develops fast.
Jianchen LIU, Pan LIU
doaj   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

open access: yesFEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Study on Characteristics of the Vibration and Noise of High-Power Scroll Compressor

open access: yesShock and Vibration, 2021
With the rapid development of a high-power scroll compressor (HSC), the dynamic performance of a scroll compressor has an important impact on the vibration and noise of the whole compressor.
Chuang Wang   +4 more
doaj   +1 more source

Natural Products as Geroprotective Modulators in Diabetic Nephropathy: A Mechanistic Framework Integrating Aging Hallmarks and the AMPK–SIRT1–Nrf2 Axis

open access: yesAging and Cancer, EarlyView.
Natural products target the aging kidney in diabetic nephropathy by restoring the AMPK–SIRT1–Nrf2 axis, reducing oxidative stress, inflammation, fibrosis, and cellular senescence while enhancing mitochondrial biogenesis and antioxidant defenses.
Sherif Hamidu   +8 more
wiley   +1 more source

Life‐Threatening Bradycardia in Anti‐NMDA‐Receptor Encephalitis and a Novel Use for Permanent Pacing

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Pediatric anti‐NMDA receptor encephalitis (pNMDARE) is an autoantibody‐mediated disorder that can cause severe autonomic dysfunction, including symptomatic bradycardia and asystole. Dysautonomia can last for years, making it very challenging to manage.
Sarah Tucker   +9 more
wiley   +1 more source

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