نتایج جستجو برای: laser doppler velocimeter

تعداد نتایج: 224815  

2015
C. P. Welsch

The Laser Applications at Accelerators network (LA3NET) is a pan-European project that has received 4.6 M€ of funding from the European Union's 7th Framework Programme. It closely links research into lasers and accelerators to develop advanced particle sources, new accelerating schemes, and in particular beyond state-ofthe-art beam diagnostics. This contribution summarizes the research achievem...

2007
Malay K. Mazumder P. K. Srirama J. Zhang Lin Zhao

In this report we present our progress of the NRA 02-OSS-01 project on the development of a prototype Dust Particle Analyzer (DPA) and its performance under simulated Martian atmospheric conditions. Both theoretical analysis assuming the predicted environmental conditions of Mars and experimental data on the development of the DPA show that the instrument has an excellent potential for its appl...

Journal: :Plastic and reconstructive surgery 2016
M Jenda Hop Carlijn M Stekelenburg Jakob Hiddingh Hedwig C Kuipers Esther Middelkoop Marianne K Nieuwenhuis Suzanne Polinder Margriet E van Baar

BACKGROUND In patients with burns, an early accurate diagnosis of burn depth facilitates optimal treatment. Laser Doppler imaging combined with clinical assessment leads to an accurate estimate of burn depth. However, the actual effects of the introduction of laser Doppler imaging on therapeutic decisions, clinical outcomes, and costs are unknown. METHODS A randomized controlled trial was con...

H. R. Sheibani and H. Bayyat,

A physical model of gabion overflow dams was studied to determine the velocity profile and Reynolds shear stress. Physical tests were done under two different conditions of dam crest, overflow dams with impermeable and with permeable crests. Instantaneous velocity components over dam crest were measured by an ADV (Acoustic Doppler Velocimeter) instrument. This instrument is capable of measuring...

Journal: :acta physiologica hungarica 2014
h khazraei m shafa h mirkhani

ranolazine is a new antianginal drug that is postulated to act through blocking of cardiac late sodium channels and improvement in cardiac blood flow. the present study has been carried out to investigate its possible effect on microcirculation of normal and diabetic rats’ cardiac muscle. methods: normal and diabetic rats were anesthetized. the chest was opened and a surface laser doppler flowm...

2002
A. Hamed

An experimental investigation was conducted to simultaneously measure the instantaneous velocities of large particles and air in two-phase flow using Laser Doppler Velocimeter. Measurements at two Photo-Multiplier voltage settings are used to separate the signals from the small seeding particles that trace the air flow and the suspended solid particle based on the difference of scattered light ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی برق 1387

در این پروژه، طراحی و ساخت بخش های الکترونیک سرعت سنج لیزری به روش زمان پرواز انجام می گیرد. هدف، طراحی و ساخت بخش های الکترونیک سرعت سنج لیزری برای مسافت های حدود 1000m بوده است. مدار گیرنده سیستم مبتنی بر یک ماژول آشکارسازیست که در آن از یک آشکارساز apd که دارای بیشترین میزان حساسیت در طول موج 900nm است استفاده می شود. با طراحی مناسب بخش تغذیه ولتاژ بالا مبتنی بر یکسوسازی ولتاژهای سینوسی یک ن...

Journal: :The American journal of physiology 1999
Astrid Rydning Oddveig Lyng Steinar Aase Jon Erik Grønbech

Calcitonin gene-related peptide (CGRP) released from sensory neurons, which are closely apposed to mast cells and blood vessels, mediates gastric hyperemia in response to acid challenge of the damaged mucosa. Substance P (SP) is coreleased with CGRP from sensory neurons, but the role of this peptide in gastric blood flow regulation is largely unknown. Chambered rat stomachs were exposed to 1.5 ...

2011
Michael P. Schultz

Turbulent boundary layer measurements have been made on surfaces covered with filamentous marine algae. These experiments were conducted in a closed return water tunnel using a two-component, laser Doppler velocimeter (LDV). The mean velocity profiles and parameters, as well as the axial and wall-normal turbulence intensities and Reynolds shear stress, are compared with flows over smooth and sa...

2004
David S. Epp O. Burak Ozdoganlar

The study of fundamental structural dynamic properties is critical for improving Micro-electromechanical System (MEMS) design and functionality. A new facility for measuring the structural dynamics of microsystem parts with a base-excitation technique is described and experimental results from a study of the effect of gas damping on the structural dynamics of MEMS are presented. The new facilit...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید