نتایج جستجو برای: water injection

تعداد نتایج: 698837  

Journal: :journal of dentistry, tehran university of medical sciences 0
jafar gharechahi professor, dental research center, department of prosthodontics, school of dentistry, mashhad university of medical sciences, mashhad, iran. nafiseh asadzadeh associate professor, department of prosthodontics, dental research center, school of dentistry, mashhad university of medical sciences, mashhad, iran. foad shahabian assistant professor, department of prosthodontics, dental research center, school of dentistry, ahvaz university of medical sciences, ahvaz, iran. maryam gharechahi assistant professor, dental material research center, department of endodontics, school of dentistry, mashhad university of medical sciences, mashhad, iran.

acrylic resin denture bases undergo dimensional changes during polymerization. injection molding techniques are reported to reduce these changes and thereby improve physical properties of denture bases. the aim of this study was to compare dimensional changes of specimens processed by conventional and injection-molding techniques.sr-ivocap triplex hot resin was used for conventional pressure-pa...

2017
Valerio Rizzi Tchavdar N. Todorov Jorge J. Kohanoff

Irradiation of biological matter triggers a cascade of secondary particles that interact with their surroundings, resulting in damage. Low-energy electrons are one of the main secondary species and electron-phonon interaction plays a fundamental role in their dynamics. We have developed a method to capture the electron-phonon inelastic energy exchange in real time and have used it to inject ele...

2012
R. Adnan

The effect of variable water injection timing on performance and emission characteristics of hydrogen fueled compression ignition (HFCI) engine has been investigated and the results are presented in this paper. In this study, water is injected from 20 BTDC to 20 ATDC with injection duration of 20 CA and 40 CA. Hydrogen is injected at the intake port with fixed injection timing from 0 CA to 40 C...

Journal: :Aviation, space, and environmental medicine 2003
Lixiong Li Jean J Renard Deborah J White

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 0

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

Journal: :Journal of the Ceramic Society of Japan 1989

2012
H. Kwak R. Kovacevic

As a new manufacturing process, abrasive water jet (AWJ)cutting has been very effective for difficult-to-machine materials. From the point of view of jet generation, abrasive water jets can be categorized as injection jeti or suspension jets. Injection jets are the most commonly used type for practical applications. An injection AWJ is formed by accelerating small abrasive particles through con...

2004
Sébastien Vigneron Carlos H. Hidrovo Fu-Min Wang Julie E. Steinbrenner Theresa A. Kramer John K. Eaton Kenneth E. Goodson

This paper presents a theoretical model and a numerical simulation of a liquid-gas two-phase flow within a microchannel (50 500 2 m m cm μ μ × × ) equipped with distributed liquid water injection through the side walls. The modeling and solution of the conservation equations provide pressure drop as a function of inlet velocity. The influence of different parameters involving water injection is...

سعادت‌جو, علیرضا, قنبرزاده, ناهید, نجفی سمنانی, محمد, نودهی, اعظم,

Background and Aim: Using various ways to decrease drug adverse pain during labor pain is accompanied by weakening of the pulmonary system of the mature fetus, and maternal mortality. The present study aimed at evaluating injection of distilled water in decreasing back pain during the active phase of labor. Materials and Methods: In this double blind clinical trial study, 160 primigravidas -app...

Journal: :International Journal of Solids and Structures 2014

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید