Discrete analytical curve reconstruction without patches

International audienceInvertible Euclidean reconstruction methods without patches for 2D and 3D discrete curves are proposed. From a discrete 4-connected curve in 2D, or 6-connected curve in 3D, the proposed algorithms compute a polygonal line which digitization with the standard model is equal to all the pixels or voxels of the curve. The framework of this method is the discrete analytical geometry and parameter spaces are used in order to simplify the algorithms. Moreover, the reconstructed polyline is more compact than classical methods such as the Marching Cubes

Legume AG41 peptide: a promising bio-insecticide

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On digital plane preimage structure

In digital geometry, digital straightness is an important concept both for practical motivations and theoretical interests. Concerning the digital straightness in dimension 2, many digital straight line characterizations exist and the digital straight segment preimage is well known. In this article, we investigate the preimage associated to digital planes. More precisely, we present first structure theorems that describe the preimage of a digital plane. Furthermore, we present a bound on the number of preimage faces under some given hypotheses. Key words: digital plane preimage, digital straight line, dual transformation.

Ondigital plane preimage structure

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Fabrication of Flexible, Transparent and Conducting Carbon Nanotube Films

奈米碳管由於本身具有的優異導電性與力學可撓性為目前新興發展的熱門材料，而當中的多層奈米碳管，更由於其低廉的材料成本與簡易的製造設備可望直接取代氧化銦錫 ( ITO ) 薄膜而應用於各類螢幕顯示器。然而至今為止，奈米碳管受限於管狀石墨管壁的特性，而難以有效組裝近而獲得品質優良的奈米碳管薄膜。在本論文中，結合超音波霧化與旋轉塗佈成功製備奈米碳管薄膜於聚對苯二甲二乙酯 ( PET ) 基板上，後續，更藉由管壁銀/鉑合金奈米顆粒的附著、聚乙烯醇 ( PVA ) 的表面塗佈保護、熱壓等方法，近一步提高奈米碳管薄膜的透光導電效能與耐撓性。而在本論文中所獲得的多層奈米碳管薄膜可達到 550nm 波長光穿透率 85%、片電阻值 150 歐姆平方、並且可以忍受高達500次以上的高角度折彎。Mechanical flexibility is essential for carbon nanotube ( CNT) films used in touch screens. So far, a robust network composed of individual CNTs is difficult to fabricate because their cohesion was limited by weak Van der Waals forces. Here we create hybrid composite films constructed from multi-walled carbon nanotube (MWCNT)-supported Ag/Pt alloy nanoparticles. Through the combination of ultrasonic atomization and spin coating methods, the Ag/Pt-MWCNT hybrid network on the flexible PET substrate have been achieved at room temperature. The hybrid network with 80% transparency at 550 nm exhibits a 154-W/sq sheet resistance, which is superior to that of single-walled CNT. Importantly, the corresponding sheet conductance exhibits no degradation even after the film was flexed and folded more than 500 times. This study may offer a direct alternative to indium tin oxide ( ITO ) and other transparent conducting oxides.序論.............................................................................................................1 1-1. 奈米碳管介紹.............................................................................2 1-2. 傳統透光導電薄膜...................................................................36 1-3. 奈米碳管用於透光導電薄膜...................................................47 1-4. 奈米碳管透光導電薄膜分類與製備.......................................99 1-5. 奈米碳管透光導電薄膜應用.................................................168 結果與討論.............................................................................................190 2-1. 研究流程.................................................................................190 2-2. 奈米碳管前處理.....................................................................195 2-2-1 機械式預分散處理........................................................210 2-2-2 強酸強鹼純化處理........................................................218 2-2-3 熱處理............................................................................232 2-3. 奈米碳管分散.........................................................................246 2-4. 透光導電薄膜.........................................................................328 2-4-1. 薄膜製備.......................................................................328 2-4-2. 薄膜檢測.......................................................................360 2-4-3. 薄膜相關參數影響.......................................................397 2-4-4. 多次轉印.......................................................................513 2-5. 奈米金屬粒子複合透光導電薄膜.........................................546 2 2-5-1. 製備奈米碳管單金屬奈米顆粒複合物.......................576 2-5-2. 製備奈米碳管雙金屬奈米顆粒複合物.......................586 2-5-3. 奈米碳管金屬複合透光導電薄膜製備.......................602 2-5-4. 奈米碳管金屬複合透光導電薄膜後處理...................612 2-2-5. 奈米碳管金屬複合薄膜薄膜檢測...............................637 結論與未來展望....................................................................................645 實驗部份.................................................................................................647 3-1. 藥品與樣品材料.....................................................................647 3-2. 儀器.........................................................................................663 3-3. 設備.........................................................................................667 3-4. 樣品製備與檢測步驟.............................................................676 引用文獻.................................................................................................68