نتایج جستجو برای: آنتنهای gpr

تعداد نتایج: 2630  

2015
Daniela De Benedetto Ruggiero Quarto Annamaria Castrignanò Domenico A. Palumbo

Over the last few years high-resolution geophysical techniques, in particular ground-penetrating radar (GPR), have been used in agricultural applications for assessing soil water content variation in a non-invasive way. However, the wide use of GPR is greatly limited by the data processing complexity. In this paper, a quantitative analysis of GPR data is proposed. The data were collected with 2...

2015
L. Sold M. Huss A. Eichler M. Schwikowski M. Hoelzle

The spatial representation of accumulation measurements is a major limitation for current glacier mass balance monitoring approaches. Here, we present a method for estimating annual accumulation rates on a temperate Alpine glacier based on the interpretation of internal reflection horizons (IRHs) in helicopter-borne ground-penetrating radar (GPR) data. For each individual GPR measurement, the s...

2016
Giovanni E. Ferreira Rodrigo G. P. Barreto Caroline C. Robinson Rodrigo D. M. Plentz Marcelo F. Silva

Objectives To systematically review randomized controlled trials that assessed the effects of Global Postural Reeducation (GPR) on patient-reported outcomes in conditions of the musculoskeletal system. Method An electronic search of MEDLINE (via PubMed), EMBASE, Cochrane CENTRAL, and SciELO was performed from their inception to June 2015. Randomized controlled trials that analyzed pain and pati...

2012
Caroline Dorn Niklas Linde Tanguy Le Borgne Olivier Bour Maria Klepikova

[1] Investigations of solute transport in fractured rock aquifers often rely on tracer test data acquired at a limited number of observation points. Such data do not, by themselves, allow detailed assessments of the spreading of the injected tracer plume. To better understand the transport behavior in a granitic aquifer, we combine tracer test data with single-hole ground-penetrating radar (GPR...

2009
Andrea FISCHER

In order to develop and evaluate a method for the determination of glacier volume from ice-thickness data, the volume of Schaufelferner, Austria, is calculated (1) by manual interpolation of ground-penetrating radar (GPR) data based on measurements at 36 locations in 1995, (2) by manual interpolation of 144 GPR measurements acquired for a higher-resolution estimate in 2003 and 2006, (3) by mult...

Journal: :Signal Processing 2008
Thomas C. T. Chan Hing-Cheung So K. C. Ho

Ground penetrating radar (GPR) is a widely used sensor for land mine detection. However, GPR signal return is very susceptible to ground bounce and reflection of clutter objects, which makes the detection a difficult problem to date. In this paper, we propose to utilize two-sided linear prediction (LP) to model the background interference and then employ the residue energy to generate the test ...

2011
Cecilia Vahlberg

Biological and chemical reactions involved in physiological processes are often complex and very sophisticated. Such processes can be mimicked in the laboratory to obtain important knowledge, valuable for the development of new diagnostic methods, drugs and biosensors. This thesis includes investigations of bio-functionalized surfaces that can be used as model systems to mimic naturally existin...

ژورنال: :فیزیک زمین و فضا 2013
ابوالقاسم کامکار روحانی اسماعیل اسحقی علیرضا عرب امیری

روش رادار نفوذی به زمین (gpr) به منزلة یک روش غیرتخریبی به منظور آشکارسازی اهداف زیرسطحی واقع در عمق کم، براساس ارسال امواج الکترومغناطیسی به درون زمین و ثبت بازتاب های دریافت شده از امواج ارسالی، مورد استفاده قرار می گیرد. دانه بندی ذرات و وجود رُس مواد زیرسطحی به دلیل تغییراتی که در میزان رسانندگی و گذردهی الکتریکی ایجاد می کنند و در نتیجه، ایجاد تغییر نسبی در عمق نفوذ امواج gpr قابل تشخیص و ب...

2007
J. M. Kruger L. Jordan

Introduction: The thickness of the lunar regolith and potential for frozen water are important considerations for future lunar outposts. However, the thickness of the regolith is largely unknown and the presence of water ice has yet to be directly detected at or beneath the surface. A rapid and economical geophysical method to determine both the thickness of the lunar regolith and possibly iden...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده برق و کامپیوتر 1392

امروزه با توجه به پیشرفت های تکنولوژی و بالاخص علم کامپیوتر و اهمیت رادار در زندگی بشر، رادارهایی با امکانات و ویژگیهای خاص طراحی و ساخته شد. یکی از این رادارها، رادار آرایه فازی میباشد که در آن از تکنیک تغییر فاز برای جابجایی پرتو تشعشعی آنتن رادار استفاده میشود. این تکنیک باعث افزایش سرعت تجسس سیستم رادار میگردد و دقت یافتن هدف را افزایش میدهد. در سالهای اخیر از این نوع رادار در رادارهای د...

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