نتایج جستجو برای: gpr هوابرد
تعداد نتایج: 2717 فیلتر نتایج به سال:
A GPR survey was carried out in advance of archaeological excavations at Madjedbebe (formerly known as Malakunanja II), a sandstone rock shelter in western Arnhem Land (Australia) containing numerous Aboriginal burials. GPR revealed subsurface patterning of rocks in the shelter deposits and archaeological excavation demonstrated that these were related to burials. Post-excavation, GIS and stati...
Gaussian process regression (GPR) is a popular tool for nonlinear function approximation. Unfortunately, GPR can be difficult to use in practice due to the O(n) memory and O(n) processing requirements for n training data points. We propose a novel approach to scaling up GPR to handle large datasets using the recent concept of doubly stochastic functional gradients. Our approach relies on the fa...
This paper proposes a probabilistic conic mixture model based on a classification expectation maximization algorithm and applies this algorithm to Ground Penetrating Radar (GPR) spatial data interpretation. Previous work tackling this problem using Hough transform or neural networks for identifying GPR hyperbolae are unsuitable for on-site applications owing to their computational demands and t...
a r t i c l e i n f o At the Late Bronze Age site of Kalavasos-Ayios Dhimitrios in southern Cyprus, the subterranean remains of previously unknown buildings were recently discovered and mapped with ground-penetrating radar (GPR). Though the fine-grained calcareous substrate at the site was not necessarily ideal for GPR—exhibiting a high clay fraction, significant volumetric water content, and s...
determination of the thickness of a mountains glacier like alamkooh is very difficult due to its extremely cold climate conditions and high elevation, risk of falling large snow segments or balls and coarse topography of the glacier. in this research, due to the transparency of ice for electromagnetic (em) waves, and also, that ground penetrating radar (gpr) method is non-destructive, fast and ...
آشکارسازی تأسیسات زیرسطحی و آگاهی از مشخصات و محل دفن دقیق آنها یکی از چالشهایی است که مهندسان تأسیسات همواره با آن مواجهاند. گسترش شهرها و بهواسطه آن نیاز به توسعه شبکههای تأسیساتی و رفاهی جدید و همچنین نیاز به تعمیر و نگهداری از شبکههای قدیمیتر، تعیین محل دقیق آنها را بسیار پراهمیت ساخته است. در این راستا روشهای غیر مخرب بهمنظور صرفهجویی در وقت و هزینه و همچنین کاهش اختلالهای نا...
در این پژوهش، تولید انرژی الکتریکی با استفاده از سامانههای هوابرد (کایت) مورد بررسی قرار گرفته است. در ابتدا مدلی مناسب برای توصیف رفتار سامانههای هوابرد استخراج شده و با بهرهگیری از آن، الگوریتمی جهت تولید مسیر حرکت مناسب در سامانه هوابرد در فاز کشش ارائه شده است. سپس، بهمنظور دستیابی به عملکرد مناسب، ردیابی مسیر مطلوب و درنتیجه تولید بهینه انرژی بادی، یک کنترلکننده مقاوم مبتنی بر روش مد ...
-Detecting subsurface objects by using GroundPenetrating Radar (GPR) has received considerable interest in recent years. In order to interpret radar signals from buried objects, one must have the ability to model a large range of objects, grounds and radar antennas, theoretically or numerically, so that a real GPR system can be simulated. Many investigations have been done for modeling objects ...
This paper presents GPR (Geographic Probabilistic Routing protocol), an opportunistic routing protocol worked between mesh routers in WMNs (Wireless Mesh Networks). In GPR, nodes detect the link condition by probe packets. In order to send a packet, the sender selects a candidate subset. The nodes who successfully received the packet send ACK according to their priority. If there are no ACKs fr...
The primary objective of the work-in-progress reported here is to compare near-surface imaging results using ultra-shallow (upper 3 m) seismic-reflection techniques and ground-penetrating radar (GPR) at an alluvial site near Great Bend, Kansas. Although various seismic and GPR surveys have been used for near-surface imaging, little i s known about how the two techniques might work in concert fo...
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