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<!-- InstanceBeginEditable name="page info" -->
<table width="1000" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td><img src="images/inside_head5.jpg" width="1000" height="83" /></td>
</tr>
<tr>
<td id="content-inside"><div id="content_fixed_bg"><table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="left" valign="top"><p><img src="images/t_showroom.jpg" width="114" height="21" /></p></td>
</tr>
<tr>
<td align="left" valign="middle" class="hd02">Ground Penetrating radar</td>
</tr>
<tr>
<td align="left" valign="middle"> </td>
</tr>
<tr>
<td align="left" valign="top" class="text">GEMS is used to simulate a GPR (Ground Penetrating Radar) model. A pair of broadband bow-tie antennas are used as the transmitting and receiving antennas. The soil is dispersive medium and the filled water inside the plastic pipe is the lossy material. GEMS is used to extract the time domain scattered signal reflected by the buried pipe. </td>
</tr>
<tr>
<td align="left" valign="top" class="text"> </td>
</tr>
<tr>
<td align="left" valign="top" class="hd01">The basic design procedure in the simulation:</td>
</tr>
<tr>
<td align="left" valign="top" class="text"><table width="100%" border="0" cellspacing="2" cellpadding="2">
<tr>
<td width="3%" align="left" valign="middle"><img src="images/bullet3.jpg" width="15" height="14" /></td>
<td width="97%" align="left" valign="middle" class="text">Draw a pair of bow-tie antennas </td>
</tr>
<tr>
<td align="left" valign="middle"><img src="images/bullet3.jpg" width="15" height="14" /></td>
<td align="left" valign="middle" class="text">Draw the excitation and output ports</td>
</tr>
<tr>
<td align="left" valign="middle"><img src="images/bullet3.jpg" width="15" height="14" /></td>
<td align="left" valign="middle" class="text">Draw a box and define it as the soil with the Debye-type dispersive material </td>
</tr>
<tr>
<td align="left" valign="middle"><img src="images/bullet3.jpg" width="15" height="14" /></td>
<td align="left" valign="middle" class="text">Draw a hollow cylinder and define it as a plastic pipe</td>
</tr>
<tr>
<td align="left" valign="middle"><img src="images/bullet3.jpg" width="15" height="14" /></td>
<td align="left" valign="middle" class="text">Draw a cylinder inside the plastic pipe and define it as lossy material</td>
</tr>
<tr>
<td align="left" valign="middle"><img src="images/bullet3.jpg" width="15" height="14" /></td>
<td align="left" valign="middle" class="text">Set the domain size and boundary</td>
</tr>
<tr>
<td align="left" valign="middle"><img src="images/bullet3.jpg" width="15" height="14" /></td>
<td align="left" valign="middle" class="text">Generate the adaptive mesh</td>
</tr>
<tr>
<td align="left" valign="middle"><img src="images/bullet3.jpg" width="15" height="14" /></td>
<td align="left" valign="middle" class="text">Specify the convergence criterion</td>
</tr>
<tr>
<td align="left" valign="middle"><img src="images/bullet3.jpg" width="15" height="14" /></td>
<td align="left" valign="middle" class="text">Simulate the project using a single PC or cluster</td>
</tr>
</table></td>
</tr>
<tr>
<td height="35" align="left" valign="middle" class="text"><span class="hd01">The basic settings in the simulation:</span></td>
</tr>
<tr>
<td align="left" valign="top" class="text"><table width="85%" border="0" align="center" cellpadding="3" cellspacing="3" class="table-border">
<tr>
<td width="28%" align="left" valign="top" bgcolor="#0056E9" class="text-white">Option</td>
<td width="38%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">Setting</div></td>
<td width="34%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">Description</div></td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;">Boundary</td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;">PML truncates all six walls</td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><p>To simulate the infinite soil in the horizontal directions </p>
</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;">Excitation</td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;"><p>Lumped port</p> </td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;">With 50 Ohms match load</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;">Mesh</td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;">Non-uniform and conformal mesh</td>
<td align="left" valign="middle" bgcolor="#FEF4D1" class="text" style="padding-left:5px;">Adaptive mesh</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;">Output</td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;">Time domain scattered signal</td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;">You need to run GEMS two times with and without the buried pipe</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;">Simulation</td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;">A PC or cluster</td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"> </td>
</tr>
</table></td>
</tr>
<tr>
<td align="left" valign="top" class="text"> </td>
</tr>
<tr>
<td align="left" valign="middle"><table width="100%" border="0" align="center" cellpadding="0" cellspacing="5">
<tr>
<td valign="top"><table width="98%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="50" valign="middle" class="hd03"><p>GPR Model</p></td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_showroom-ground01.jpg" width="245" height="195" /></td>
</tr>
<tr>
<td align="center" valign="top"> </td>
</tr>
<tr>
<td height="50" class="hd03">Mesh and Material Distribution</td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_showroom-ground04.jpg" width="245" height="195" /></td>
</tr>
</table></td>
<td align="center" valign="top"><table width="98%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="50" valign="middle" class="hd03">Transmitting and Receiving <br />
Antennas</td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_showroom-ground02.jpg" width="245" height="195" /></td>
</tr>
<tr>
<td align="center" valign="top"> </td>
</tr>
<tr>
<td height="50" valign="middle" class="hd03">Field Distribution in One
Cross Section</td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_showroom-ground05.jpg" width="245" height="195" /></td>
</tr>
</table></td>
<td align="center" valign="top"><table width="98%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="50" class="hd03"><p>Antenna Loads</p></td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_showroom-ground03.jpg" width="245" height="195" /></td>
</tr>
<tr>
<td align="center" valign="top"> </td>
</tr>
<tr>
<td height="50" class="hd03">Scattered Time Domain
Signal</td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_showroom-ground06.jpg" width="245" height="195" /></td>
</tr>
</table></td>
</tr>
</table></td>
</tr>
<tr>
<td align="left" valign="middle"><table width="65%" border="0" align="center" cellpadding="0" cellspacing="5">
<tr>
<td height="50" align="center" class="hd03">3-D Field Distribution</td>
<td align="center" class="hd03"> </td>
</tr>
<tr>
<td align="center"><img src="images/img_showroom-ground07.jpg" width="245" height="195" /></td>
<td align="center"> </td>
</tr>
</table></td>
</tr>
</table>
</div></td> </tr>
</table>
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<td align="left" valign="top">Copyright © 2016 纽尔科技. All Rights Reserved.</td>
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</table></td>
</tr>
<tr>
<td> </td>
</tr>
</table>
</body>
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