There are several problems related to the properties of the triangular mesh representation that describes a surface of an object. Sometimes, the surface is represented just as a set of triangles without any other information and the STL file format, which is used for data exchanges, is a typicalexampl e of this situation.
標(biāo)簽： representation properties triangular the
上傳時間： 2014-11-12
上傳用戶：colinal
Quality control of production has always been a necessity in stainless steel mills. The users of stainless steel set ever-increasing requirements on product quality. Many material properties can still only be measured in laboratory but more and more measurements are now made on-line during the production. Especially surface defects have to be detected on-line with a surface inspection system because of their random appearance.
標(biāo)簽： production necessity stainless Quality
上傳時間： 2014-11-18
上傳用戶：baiom
這個軟件包(C++)是我尋找電磁學(xué)代碼無意中找到了，功能相當(dāng)強大（并行計算，快速多極子等）。缺點是安裝相當(dāng)麻煩，需要若干個其他軟件包。我在Fedora Core9下編譯其中所需blitz++時出錯，在 ubuntu下可以所有均編譯通過，運行時出現(xiàn)一個錯誤，我找不到原因（本人水平有限），但從學(xué)習(xí)電磁學(xué)有關(guān)算法／程序設(shè)計來說，已經(jīng)是相當(dāng)了不起的開源軟件了。parallel unified multipole algorithm for Electromagnetics (Puma-EM). Aim is providing surface Method of Moments for Electromagnetics, enhanced by using the Multilevel Fast Multipole Method. Code is parallelized and runs on Desktops and clusters.
上傳時間： 2013-12-26
上傳用戶：lanjisu111
An adaptive fuzzy integral sliding mode controller for mismatched time-varying linear systems is presented in this paper. The proposed fuzzy integral sliding mode controller is designed to have zero steady state system error under step inputs and alleviate the undesired chattering around the sliding surface
標(biāo)簽： time-varying controller mismatched adaptive
上傳時間： 2014-12-04
上傳用戶：luopoguixiong
Long-distance rmi transfers java to realize may realize a service end many client side conversation contact surface to be artistic
標(biāo)簽： realize Long-distance conversation transfers
上傳時間： 2017-01-21
上傳用戶：cuiyashuo
Description The art galleries of the new and very futuristic building of the Center for Balkan Cooperation have the form of polygons (not necessarily convex). When a big exhibition is organized, watching over all of the pictures is a big security concern. Your task is that for a given gallery to write a program which finds the surface of the area of the floor, from which each point on the walls of the gallery is visible. On the figure 1. a map of a gallery is given in some co-ordinate system. The area wanted is shaded on the figure 2.
標(biāo)簽： Description futuristic galleries the
上傳時間： 2017-02-17
上傳用戶：1427796291
a MATLAB program which reads files defining a piecewise constant triangulation of data, and displays a corresponding 3D surface.
標(biāo)簽： triangulation piecewise defining constant
上傳時間： 2014-11-14
上傳用戶：黃華強
We analyze, both analytically and numerically, the effectiveness of cloaking an infinite cylinder from observations by electromagnetic waves in three dimensions. We show that, as truncated approximations of the ideal permittivity and permeability tensors tend towards the singular ideal cloaking fields, so that the anisotropy ratio tends to infinity, the D and B fields blow up near the cloaking surface. Since the metamaterials used to implement cloaking are based on effective medium theory, the resulting large variation in D and B will pose a challenge to the suitability of the field averaged characterization of " and 碌. We also consider cloaking with and without the SHS (softand- hard surface) lining, shown in [6] to be theoretically necessary for cloaking in the cylindrical geometry. We demonstrate numerically that cloaking is significantly improved by the SHS lining, with both the far field of the scattered wave significantly reduced and the blow up of D and B prevented.
標(biāo)簽： effectiveness analytically numerically cloaking
上傳時間： 2017-03-30
上傳用戶：zxc23456789
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.
標(biāo)簽： distribution dimensional transport obtained
上傳時間： 2013-12-19
上傳用戶：zhliu007
The Schumann resonance frequencies are a set of eigenmodes in the extremely low frequency (ELF) portion of the electromagnetic field spectrum. These frequencies are only present for planetary-like bodies with a substantial ionosphere acting as a perfect electric conductor, thus forming a resonance cavity with the surface. In this example, the Schumann resonance frequencies for the Earth are calculated.
標(biāo)簽： frequencies eigenmodes resonance extremely
上傳時間： 2014-12-09
上傳用戶：stella2015
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