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    March 10

    美国梦·看图说话(三)--大师罗丹

    周六去了Stanford University、Computer History Museum等处,
    走马观花了一圈,
    回来之后才发现,
    原来已经与那么多的大师失之交臂、匆匆而过……
    More pictures on Picasa...

    • 不知RODIN为罗丹
    The Cantor Art Center's collection of Rodin bronzes is the largest in the world outside Paris, second only to the Musee Rodin. More than 50 works by Rodin are on view inside the Center, mostly cast bronze, but also works in wax, plaster, and terra cotta. Twenty bronzes, including The Gates of Hell (地狱之门), on which Rodin worked for two decades to complete, are outside in the Sculpture Garden. The Burghers of Calais are nearby on campus.




    • 可编程计算机的发明者、计算机的先驱:英国数学家查 尔斯·巴贝奇(Charles Babbage)
    很传奇的经历:计算机博物馆董事长Shustek说,英国政府资助了他的早期工作,期望以此获得更高精度的导航、科学和工程数据,尽管巴贝奇很聪 明,却没能够将其实现。“他的失败并非技术问题,而是管理。一个大问题是,总在半路他又有了新想法,在进行工程项目时不得不学会说‘不’这正是我们现在做 的。” 在失去了政府的资助后,巴贝奇仍在继续工作,那是一台更为复杂的机器,称为分析机。这台机器本有希望成为真正的计算机,可以运行包含“条件”、“循环”语 句的程序,有寄存器用来存储数据,不过同样没有完成。

    同样很传奇的经历:德•福雷斯特那年也不到30岁。孩提时期并不出众,被老师认为是个平庸的孩子,唯一的爱好是拆装各种机械小玩艺,志向不高,只想做个机械技师或者当一名机械工。一次偶然的机会邂逅了无线电发明家马可尼,激发了他创新无线电检波装置的发明之梦。大学毕业后的短短5年,他连续取得了34项发明专利。
    1906年,为了提高真空二极管检波灵敏度,德•福雷斯特在弗莱明的玻璃管内添加了一种栅栏式的金属网,形成电子管的第三个极。他惊讶地看到,这个“栅 极”仿佛就像百叶窗,能控制阴极与屏极之间的电子流;只要栅极有微弱电流通过,就可在屏极上获得较大的电流,而且波形与栅极电流完全一致。也就是说,德• 福雷斯特发明的是一种能够起放大作用的真空三极管器件。
    然而,因发明这种新型电子管,德•福雷斯特竟无辜受到美国纽约联邦法院的传讯,原因是有人控告他企图为公司推销积压产品,进行商业诈骗。愚昧无知的法官下 达判决,宣布德•福雷斯特发明的电子管是一个“毫无价值的玻璃管”。


    -- 
    Thanks,
    Yonghui.

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