نتایج جستجو برای: nondestructive method

تعداد نتایج: 1633342  

M. Hashemi M. Madhoushi M.P. Ansell

The aim of this study was to evaluate sound and decayed wood of Iranianbeech (Fagus orientalis) with a nondestructive stress wave method. Wood samples,with dimensions of 9 by 19 by 200 mm were decayed in laboratory soil-bed tests,based on European pre-standard ENV-807. The decay was evaluated by measuringbending dynamic modulus of elasticity (MOEd) and longitudinal dynamicmodulus of elasticity ...

Journal: :مهندسی بیوسیستم ایران 0
رحمت اله باقری دانشجوی کارشناسی ارشد،گروه ماشین های کشاورزی، دانشکده کشاورزی دانشگاه صنعتی اصفهان سید احمد میره ای استادیار، گروه ماشین های کشاورزی، دانشکده کشاورزی، دانشگاه صنعتی اصفهان مرتضی صادقی دانشیار، گروه ماشین های کشاورزی، دانشکده کشاورزی، دانشگاه صنعتی اصفهان امین اله معصومی استادیار، گروه ماشین های کشاورزی، دانشکده کشاورزی، دانشگاه صنعتی اصفهان شهرام موم کش دانشجوی کارشناسی ارشد، گروه ماشین های کشاورزی، دانشکده کشاورزی،دانشگاه صنعتی اصفهان

developing a rapid, nondestructive and reliable method to measure moisture content of date fruit is of interest in pre- and post-harvest processes of this valuable product. throughout this research, by putting date palm fruits (cv. mazafati) in a parallel plate capacitor, the sinusoidal alternative voltage in the frequency range of 1 to 100 mhz was exerted to the dates and the response of the c...

2017
Jae-Hwang Lee Chang-Hwan Kim Yong-Sung Kim Kai-Ming Ho Kristen P. Constant Wai Y. Leung Kristen Constant Wai Leung

We studied the first-order diffractedmoiré fringes of transparent multilayered structures comprised of irregularly deformed periodic patterns. By a comparison study of the diffractedmoiré fringe pattern and detailed microscopy of the structure, we show that the diffractedmoiré fringe can be used as a nondestructive tool to analyze the alignment of multilayered structures. We demonstrate the ali...

2006
Tariq Alkhalifah

The practical limits on resolution of images from seismic or radar (electromagnetic) data depend on the spectrum of the source pulse, the incompleteness of the recording geometry, and the fidelity with which one can model the reference medium. These factors together prevent one from recovering a point image from data produced by a point diffractor in a given body. A simple imaging formula quant...

2013
Ali Khaloo Masoud Sanayei

Structural Health Monitoring (SHM) using nondestructive test (NDT) data has become very promising for finite element (FE) model updating, model verification, structural evaluation, and damage assessment. This research presents a multiresponse structural parameter estimation method for the FE model updating using data obtained from a nondestructive test on a laboratory bridge model. Having measu...

2008
E E Fill F Krausz M G Raizen

We investigate the possibility of nondestructive electron diffraction imaging of a single molecule to determine its structure. The molecular specimen will be held on a free-standing sheet of graphene. Due to the high conductivity of graphene, electrons lost by ionization would be rapidly replaced, enabling repeated nondestructive interrogation. Limits of resolution, maximum particle size and re...

2000
Y. C. Chan

This paper reports, for the first time, the use of endoscopy for the nondestructive examination of solder joint integrity in chip scale packages (CSP) such as flip chip on flex (FCF). Borrowed from the medical instrument technology, the endoscope is used to examine visually the inside of an organ. This concept has now been developed and refined by ERSA and KURTZ, and led to an ERSASCOPE inspect...

2000
R. F. Chen

Chlorophyll degradation products are preserved in marine sediments over timescales of thousands of years. The production of chlorophyll in the water column is related to biological productivity, so chlorophyll degradation products (chlorins) preserved in marine sediments can be used as indicators of paleoproductivity. A new, rapid, nondestructive method of determining chlorin concentrations in ...

2012
Jeremy S. Knopp Fumio Kojima

This paper is concerned with a stochastic inverse methodology arising in electromagnetic imaging. Nondestructive testing using guided microwaves covers a wide range of industrial applications including early detection of anomalies in conducting materials. The focus of this paper is the identification of electromagnetic material parameters and emphasis is on one dimensional scattering of a diele...

2013
Xiaoxia Yang Shili Chen Fang Sun Shijiu Jin Wenshuang Chang

Ultrasonic phased array inspection technology is widely used in nondestructive evaluation (NDE) applications and it has been proved to be an effective method for flaw detections in industry. In our study, this nondestructive evaluation method is proposed to detect the corrosion defects on engine cylinders. In order to demonstrate its feasibility, it is necessary to study the characteristics of ...

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