说明： GR(M)-87目前只能应用于WINCE5.0版本中，其它版本用不了。 1.该软件是用来检测GPS的COM以及GPS信号的软件，应用广泛 2.mGpsCmd是PPC(WINCE系统)用的，GpsViewer 1.5是PC和PPC的安装程序，考到SD卡上就可以直接用！ 用法1：搜索COM口，连上GPS，点SCAN，如果提示找到FOUNDGPS，那么就是对应的COM口 3..在WINDOWS XP/2000系统使用，安装USB_driver -V2.1.0.exe 驱动程序，串口也通用。 4.安装GpsViewer 1.5.exe。安装完后，打开进入界面，COM Port 不用选择，会自动扫描，见GPS1的图片；Baudrate：4800. 然后按Scan...进行扫描到串口后，再按Open GPS,即可会自动找到卫星，从图上或下面的显示可以看到。见GPS2图片。 5.GPS天线必须放在室外才有效。 6.GpsViewer， mGpsCmd软件不会自动刷新，请一会按下最小化，一会再点弹出来，手动刷新。
上传时间： 2017-03-05
上传用户：四只眼
A cylindrical wave expansion method is developed to obtain the scattering field for an ideal two-dimensional cylindrical invisibility cloak. A near-ideal model of the invisibility cloak is set up to solve the boundary problem at the inner boundary of the cloak shell. We confirm that a cloak with the ideal material parameters is a perfect invisibility cloak by systematically studying the change of the scattering coefficients from the near-ideal case to the ideal one. However, due to the slow convergence of the zeroth order scattering coefficients, a tiny perturbation on the cloak would induce a noticeable field scattering and penetration.
标签： cylindrical scattering expansion developed
上传时间： 2017-03-30
上传用户：lhc9102
In an electromagnetic cloak based on a transformation approach, reduced sets of material properties are generally favored due to their easier implementation in reality, although a seemingly inevitable drawback of undesired reflection exists in such cloaks. Here we suggest using high-order transformations to create smooth moduli at the outer boundary of the cloak, therefore completely eliminating the detrimental scattering within the limit of geometric optics. We apply this scheme to a non-magnetic cylindrical cloak and demonstrate that the scattered field is reduced substantially in a cloak with optimal quadratic transformation as compared to its linear counterpart.
标签： electromagnetic transformation properties approach
上传时间： 2017-03-30
上传用户：pkkkkp
We obtained the energy transport velocity distribution for a three dimensional ideal cloak explicitly. Near the operation frequency, the energy transport velocity has rather peculiar distribution. The velocity along a line joining the origin of the cloak is a constant, while the velocity approaches zero at the inner boundary of the cloak. A ray pointing right into the origin of the cloak will experience abrupt changes of velocities when it impinges on the inner surface of the cloak. This peculiar distribution causes long time delays for beams passing through the ideal cloak within a geometric optics description.
标签： distribution dimensional transport obtained
上传时间： 2013-12-19
上传用户：zhliu007
ScienceOps has answers. Rapid Custom Algorithm development www.ScienceOps.com Simpleware From 3D scan to CAD, FE/CFD, and RP Join our Webinar on March 12th www.simpleware.com Steganography Software Hide Secrets Using this Powerful Steganography Software. $39 InvisibleSecrets.com Develop VoIP softphone SIP softphone SDK (activeX & DLL) Add VoIP in your app/webpages. www.vaxvoip.com
标签： ScienceOps development Simpleware Algorithm
上传时间： 2017-04-13
上传用户：qlpqlq
3 simple AVR assembler code to use seven segment display. These 3 codes realy simple way using seven segment display. these are using in my microprocessor classes. Wert deney1.asm -> no scan Wert Deney2.asm -> Scan but BCD Werrt Deney3.asm -> Scan with BCD. By Basri KUL
标签： simple seven assembler segment
上传时间： 2017-05-07
上传用户：13517191407
This program incorporates the FV method for solving the Navier-Stokes equations using 2D, Cartesian grids and the staggered arrangement of variables. Variables are stored as 2D arrays. SIMPLE method is used for pressure calculation. UDS and CDS are implemented for the discretization of convective terms, CDS is used for the diffusive terms. The boundary conditions are set for the lid-driven cavity flow. Only steady flows are considered.
标签： Navier-Stokes incorporates Cartesian equations
上传时间： 2017-05-14
上传用户：ryb
The 2D CFD Program NaSt2D The program is a 2D solver for the incompressible, transient Navier-Stokes equations including the temperature equation and free boundary problems. It uses finite differences for discretization on a structured equidistant staggered grid, central and upwind (donor-cell) discretization of the convective parts and an explicit time stepping scheme. The free boundary value problems are treated with the MAC technique.
标签： incompressible Navier-Sto The transient
上传时间： 2013-11-30
上传用户：xfbs821
Solves the incompressible Navier-Stokes equations in a rectangular domain with prescribed velocities along the boundary. The standard setup solves a lid driven cavity problem.
标签： incompressible Navier-Stokes rectangular prescribed
上传时间： 2013-11-25
上传用户：15736969615
摘 要 文章以空间监控系统为背景,深入研究了JPEG图像压缩标准的实现方法,并基于FPGA对其进行了实现和优化。文中给出了详细的实现方法和优化过程,测试表明达到了很好的效果。 简单介绍了有损静态图像压缩当前有两种比较流行的标准JPEG和JPEG2000。说明了用JPEG方法压缩的原因。 介绍JPEG基本原理：JPEG对灰度图像的压缩处理过程主要包括:图像分割,离散余弦变换(DCT),量化(Quantization),“Z”形排序(Zigzag Scan),差分脉冲编码调制(Differential Pulse Code Modulation,DPCM)对直流系数(DC),行程长度编码(Run-Length Encoding,RLE)对交流系数(AC),霍夫曼(Huffman)编码等。 JPEG标准的特点是离散余弦变换。 比较详细介绍压缩系统的构成和实现。实现提及步骤， JPEG压缩模块设计和编码模块实现细节。
上传时间： 2013-12-25
上传用户：410805624
