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History of the Great Central Railway

為了解決steam的問題，作者Jones, Robin 這樣論述：

The Great Central Railway is the only double track preserved steam railway in the world and its main focus is on the hugely popular modern day line running between Loughborough and Leicester North. Author Robin Jones, editor of Heritage Railway magazine, uses an incredible collection of images fr

om Britain’s top railway photographers to showcase the very best of preserved steam running in an authentic setting. History has its place too with the formation of the original Great Central Railway, built in 1899 to connect the cities of Manchester, Sheffield and London, being explained and examin

ed. Preservation sites set up elsewhere on the former Great Central line are also detailed including those at Buckinghamshire Railway Centre, Elsecar Heritage Railway and Dinting Railway Centre in Glossop

steam進入發燒排行的影片

三相電磁噴流之研究

為了解決steam的問題，作者鄭力瑋 這樣論述：

摘要電磁噴流是一種運用磁流體力學(Magnetohydrodynamics, MHD)之概念，當給予電極板電能與固定磁場時，便可產生勞倫茲力，藉此推動導電流體。其優點在於致動原理簡易，且不需要依靠複雜的機械結構，便可實現推送之效果。常見的應用在微尺度之微動幫浦與大型船體無槳式推進器上，以往許多研究都著重在電場與磁場之設計與幾何構型的最佳化，而本研究透過實驗探討在電磁噴流中，電極板附帶產生電化學反應而生成氣泡所構成之多相噴流場。並藉由染劑與氣泡之方式發展一流場可視化之方法。本研究透過計算染劑之汙染面積並與數值模擬結果進行比較，發現在低電流時之預測流量結果較為相近。並定義一無因次參數為勞倫茲力雷

諾數(Re_L)，用以描述電磁噴流之流場型態，實驗結果透過定性觀察當勞倫茲力雷諾數(Re_L)大於1600時，噴流型態會發展成紊流的型式。透過無因次分析結果也顯示其噴流擴散角(θ)與氣泡佔比(Ag)有隨Re_L數增加而有上升之趨勢，且在Re_L數大於1600後，因流場型態轉變，擴散角與氣泡佔比也有明顯上升之現象。在最後討論使用鋁電極板對於電磁噴流之影響。

Floating World to Modern World: The Japanese Print in Transition

為了解決steam的問題，作者Paget, Rhiannon 這樣論述：

A stunning introduction to the history of Japanese printmaking, with highlights from the de Young museum’s vast collectionIn 1868, Japan underwent a dramatic transformation following the overthrow of the shogun by supporters of Emperor Meiji, marking the end of feudal military rule and ushering i

n a new era of government that promoted modernizing the country and interacting with other nations. Japanese print culture, which had flourished for more than a century with the production of color woodcuts (the so-called ukiyo-e, or ＂floating world＂ images), also changed course during the Meiji er

a (1868-1912), as societal changes and the once-isolationist country’s new global engagement provided a wealth of new subjects for artists to capture. Featuring selections from the renowned Achenbach Foundation for Graphic Arts’ permanent collection, Japanese Prints in Transition: From the Floating

World to the Modern World documents the shift from delicately colored ukiyo-e depictions of actors, courtesans, and scenic views to brightly colored images of Western architecture, modern military warfare, technology (railroad trains, steam-powered ships, telegraph lines), and Victorian fashions and

customs.

氧化鎳負載於鋯酸稀土金屬氧化物Ln2Zr2O7(Ln= La,Nd,Gd,Ho)對於乙醇氧化蒸氣重組反應之影響

為了解決steam的問題，作者謝育平 這樣論述：

本研究以Glycine-nitrate Combusion法合成Ln2Zr2O7(LnZO)，Ln=La、Nd、Gd、Ho，La2Zr2O7(LZO)、Nd2Zr2O7(NdZO)為燒綠石結構；Gd2Zr2O7(GdZO)、Ho2Zr2O7(HoZO)為螢石結構，使用該法製備的粉體透過2種製程來製作壓碇及注漿2種載體。透過BET測量載體比表面積上，載體前趨物的粉體夠小，則2種製程對於比表面積的影響不大，比表面積大部分以壓碇載體大於注漿載體，數值都介於一個數量級之間。效率測試部分，本研究以氧化鎳為觸媒，含浸在2種壓碇及注漿載體上，個別進行乙醇氧化蒸氣重組反應(OSRE)產氫，在C/O=0.7，

啟動溫度為500°C和GHSV=120,000h-1的條件下，在含浸絕對重量相同的氧化鎳在4種LnZO的壓碇及注漿載體上，2種載體活性表現相似，且在NiO/GdZO有最佳氫氣選擇率121%(0.7)，乙醇轉化率為100%(0.5)。活性表現的因素有以下兩種可能：1. 載體的酸鹼特性會影響氣體的吸附表現，在NiO/GdZO上顯示，可以有效地吸附CO，並且促進WGS反應的發生。2. 載體結構有2種，燒綠石以及螢石結構，螢石結構因為金屬陽離子會共同填站在同一位置上，因此有較多的氧空缺生成，強化氣體的吸附，使得活性表現獲得進一步的提升。最佳的觸媒載體組合為NiO/GdZO，在100小時的長

時間活性測試後，氫氣選擇率為88%，乙醇轉化率為100%轉換。