“天使”,天堂搜索

花落去 撰稿 • 2009-06-18 10:05:22 • 栏目:文化副刊

  他和弟子们开发出了搜索导航全世界的技术,却在家门三尺外的游泳池里溺水而亡。

  拉吉夫·莫特瓦尼(Rajeev Motwani)的尸体是在6月5日早晨被邻居发现的,漂浮在自家的游泳池内。据朋友回忆,6月4日晚,47岁的莫特瓦尼与学生和同事在家举行聚会,宾客们吸烟放松时,他走出了房间,再也没有回来。

  作为印度移民,莫特瓦尼颇具代表性。与一般印象不同,印度移民到美国最多从事的职业并非餐馆,而是程序员,整个硅谷中,印度裔的比例达到了惊人的38%。印度高校学费极廉,每年仅为4美元左右,年轻人进入大城市的捷径便是上大学。受惠于这种福利,莫特瓦尼1983年毕业于坎普尔后赴美求学,1988年获得博士学位并执教于斯坦福,开始了他硅谷伯乐的生涯。

   在硅谷,莫特瓦尼最为人熟知的是他与Google的关系。一定程度上说,他也参与了创办Google的历程,甚至可以说是其早期的精神导师。1993年,Google两创始人之一的谢尔盖·布林来到斯坦福学习时,莫特瓦尼担任他的指导教师。而另一位拉里·佩奇于1995年来斯坦福学习时,莫特瓦尼将自己擅长的数据挖掘技术倾囊相授。他曾经直观地描述这两位弟子的不同:“如果有20个人在一起开会,谢尔盖肯定是那个最引人注目的人。而拉里即使就坐在人群中,你也注意不到他,不过事后他会问,‘嘿,你觉得这个想法如何?’”

  布林在博客上悼念莫特瓦尼说:“我将深深地怀念他。他的思想遗产和人格将与他接触过的学生、项目和企业同在……今天,你使用的随便一项网络技术,很可能就有莫特瓦尼一点贡献隐藏其后。”

  这并非溢美之词。1995年以前,互联网的搜索引擎技术还十分原始,人们多以页面的浏览量对搜索结果进行排序。佩奇从学术论文的质量评比标准——被引用次数越多越重要——得到启发,探索以页面被链接的数量作为排序标准。这需要在山一样的数据中进行挖掘与分析,这正是莫特瓦尼的专长。他们成了了一个小组进行探索。

  1998年,佩奇、布林与莫特瓦尼在一篇联名发表的论文中提到,“我们已经开发出了一个名为PageRank的排序算法……已经将其应用于一个名为Google的搜索引擎。”这就是日后Google名震天下的“佩奇排名”,其具体实现方法是Google的最高机密,就像可口可乐的秘方一样。随着莫特瓦尼的逝去,知道秘密的人又少了一位。

  莫特瓦尼对Google之重要并非只在技术上,还来自于他另一个著名的身份“天使投资人”。天使投资人相当风险投资商(VC)里的个体户,通常对有希望的创意和小公司进行投资,待公司上市或被收购后获利退出。硅谷的小公司多如牛毛,不是人人都有门路得到VC的青睐,天使投资人群体使这些小公司得以发展。

  作为大学教授,莫特瓦尼和同事们不靠考研辅导、讲座、跟国家要项目来挣钱,而是在学生中发掘人才帮助其创业,获得投资回报。Google技术刚出现时,佩奇和布林曾打算将其出售以继续学业,但被雅虎等巨头拒绝后,莫特瓦尼和其他老师鼓励他们自己创业并投入启动资金,改变世界的Google公司才得以面世。斯坦福大学从未参加任何“大学工程”评比或获得美国国家拨款,但依然诞生了雅虎、Google、Sun、Facebook等世界级大公司;有一群懂行又敬业的天使投资人存在,是重要因素。除了投资Google,莫特瓦尼还曾成功投资Paypal等重要企业。

  离世前不久,莫特瓦尼刚刚决定学习游泳,而这个愿望只能去天堂完成。他和弟子们开发出了搜索导航全世界的技术,却在家门三尺外的游泳池里溺水而亡。

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