IT界如雷贯耳的贝尔实验室的历史

贝尔实验室
  贝尔实验室是晶体管、激光器、太阳能电池、发光二极管、数字交换机、通信卫星、电子数字计算机、蜂窝移动通信设备、长途电视传送、仿真语言、有声电影、立体声录音,以及通信网的许多重大发明的诞生地。自1925年以来,贝尔实验室共获得两万五千多项专利,现在,平均每个工作日获得三项多专利。 贝尔实验室的使命是为客户创造、生产和提供富有创新性的技术,这些技术使朗讯科技(Lucent Technologies)公司在通信系统、产品、元件和网络软件方面处于全球领先地位。
  贝尔电话实验室或贝尔实验室,最初是贝尔系统内从事包括电话交换机,电话电缆,半导体等电信相关技术的研究开发机构。
  1925年,当时AT&T总裁,华特·基佛德(Walter Gifford)。收购了西方电子公司的研究部门,成立了一个叫做“贝尔电话实验室公司”的独立实体。AT&T和西方电子各拥有该公司的50%。
  贝尔实验室的工作可以大致分为三个类别:基础研究,系统工程和应用开发。在基础研究方面主要从事电信技术的基础理论研究,包括数学,物理学,材料科学,行为科学和计算机编程理论。系统工程主要研究构成电信网络的高度复杂系统。开发部门是贝尔实验室最大的部门,负责设计构成贝尔系统电信网络的设备和软件。
  1984年以后,按照美国政府分拆AT&T的协议,从贝尔实验室中分割成立了Bellcore。Bellcore 为分拆后的一系列小贝尔公司统一提供研究开发的服务。
  1996年,贝尔实验室以及 AT&T 的设备制造部门脱离 AT&T 成为朗讯科技。 AT&T保留了少数研究人员成为其研究机构——AT&T实验室。
  贝尔实验室的重要研究成果包括:
  1933年,卡尔·央斯基(Karl Jansky)通过研究长途通讯中的静电噪声发现银河中心在持续发射无线电波,此电波称为3K背景辐射。透过此研究而建立了射电天文学。
  1947年,贝尔实验室发明晶体管。参与这项研究的约翰·巴丁(John Bardeen)、威廉·萧克利(William Shockley)、华特·豪舍·布拉顿(Walter Houser Brattain)于1956年获诺贝尔物理学奖。
  香农(Claude Shannon)于1948年发表论文《通讯的数学原理》,奠定了现代通信理论的基础。他的成果是部分基于奈奎斯特和哈特利先前在贝尔实验室的成果。
  贝尔实验室发明光电池。
  贝尔实验室也是UNIX操作系统和C语言的发源地。C语言是由Brian Kernighan、Dennis Ritchie 和 Ken Thompson 在1970年代早期开发的。在1980年代,又由比加尼·斯楚士舒普发展为C++语言。
  2008年8月7日,由于其所有者阿尔卡特朗讯连续6个季度决亏损,自阿尔卡特和朗讯科技合并以来从未盈利,市值已经蒸发了62%,阿尔卡特朗讯不得不出售已经拥有46年历史的贝尔实验室大楼,由美国新泽西的Somerset房地产开发公司购得,并打算将其改建为商场和住宅楼。
  贝尔实验室的母公司阿尔卡特朗讯(Alcatel-Lucent)正在退出基础科学,物理科学和半导体科学研究,将集中于能更快进入市场的领域,如网络、高速电子学、无线技术、纳米技术和软件。正如贝尔实验室发言人说,“在新的创新模式下,研究应该致力于解决母公司的需求”。
  More than any other institution, Bell Labs has helped weave the technological fabric of modern society. Its scientists and engineers have made seminal scientific discoveries, have launched technological revolutions that have reshaped the way people live, work and play, and have built the most advanced and reliable communications networks in the world.
  Today, as the innovation engine behind Lucent Technologies, Bell Labs designs products and services that are at the forefront of communications technology, and conducts fundamental research in fields important to communications. Guided by both experience and vision, Bell Labs is taking the lead in shaping tomorrow's broadband networks powered with service intelligence at every network layer.
  The Bell Labs Difference
  The new Bell Labs is spread across more than 10 countries - the largest R&D organization focused on the needs of large service providers, the leading source of new communications technologies and the most creative force in communications networking today.
  The technology needs of leading service providers now drive our R&D efforts. For example, we have increased our investment in R&D that will enable simpler, more "service-friendly" networks with more intelligence in every layer. Bell Labs R&D also includes optical network technologies, packet data solutions, circuit-to-packet network migrations, spread-spectrum wireless technologies, and network operation and management software.
  The breadth and depth of experience that the people of Bell Labs bring to the table are unrivaled in the industry. Perhaps that is why - more often than not - Bell Labs provides the vision and sets the pace for the entire communications industry. Our scientists and engineers are constantly pushing the envelope of what's possible in communications.
  Bell Labs is so productive it receives about two patents per working day. Yet what Bell Labs brings to Lucent and its customers is more than a knack for creating new technologies. Customers' needs for technology integration, for network planning, optimization, and management have never been greater. And Bell Labs, which pioneered systems engineering and many areas of operations research, answers this call with its deep understanding of how large, complex networks fit together.
  Shaping the Future
  Past Bell Labs breakthroughs - like transistors, lasers and digital encryption - are the basis of today's communications industry. The innovations coming out of Bell Labs today are laying the foundation for tomorrow's networks. Examples include:
  Softswitches, the "brains" of a new network architecture that enables service providers to quickly introduce new services and manage the convergence of voice and data traffic on their networks.
  Smart antennas and other wireless technologies that can reduce equipment size, cost, and power requirements.
  Raman and L-band amplifiers, which expand the capacity of optical networks.
  Software and technology that can shorten service-creation intervals, improve customer relationships, reduce costs, and optimize networks.
  Research
  While the vast majority - more than 90 percent - of the scientists and engineers at Bell Labs are applying their considerable talents to the needs of service providers, it is prudent to maintain a broader technical capability than what is currently required by our customers. For this reason, Bell Labs maintains a small, but prolific, long-term research program. That research explores such areas as the future of wireless and optical networking, the Internet, multimedia communications, physics and mathematics. Lucent's investment in long-term research provides the "seed corn" to ensure that we maintain a leading position in technologies critical to our future.
  In the last few months, this research program has produced:
  The world's first semiconductor laser that emits light continuously and reliably over a broad spectrum of infrared wavelengths.
  The discovery that crystals in the skeletons of marine creatures called brittlestars act as optical receptors. By studying them, we might learn how to design better optical elements for telecommunications networks.
  Improved superconducting materials.
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padding: 0; } .title1 { background-image: url(pic/title1.gif); background-repeat: no-repeat; height: 70px; margin-bottom: 10px; } .title3 { background-image: url(pic/title3.gif); background-repeat: no-repeat; height: 40px; margin-bottom: 10px; } #extra-img { position: absolute; top: 500px; left: 500px; width: 150px; height: 100px; background-image: url(pic/bg0.gif); background-repeat: no-repeat; z-index: 2; }body{ background-image: url(pic/bg1.jpg); font-family: Verdana, Geneva, sans-serif; font-size: 13px; color: darkgray; line-height: 1.5; margin: 0; } #father{ width:900px; background-color:white; background-image:url(pic/logo.gif); margin-left:auto; margin-right:auto; height:150px; background-repeat:no-repeat; background-position:right top; height:1100px; } #intro{ width:300px; border:1px gray dotted; margin:5px; padding:5px; float:left; } #intro img{ width:280px; height:220px; border:1px gray solid; } #scene{ width:555px; border:1px gray dotted; margin:5px; padding:5px; float:right; background-image:url(pic/bg3.jpg); margin-top:150px; position: relative; z-index: 1; } #scene img{ width:200px; height:170px; border:5px gray solid; float:left; margin-right: 10px; margin-bottom:10px; } #scene1,#scene2{ clear:both; width:450px; border-top:1px skyblue dashed; margin:10px auto; padding-top: 10px; } #food{ float:left; width:300px; border:1px gray dotted; margin-left:5px; padding:5px; clear: left; } #food img{ width:280px; height:220px; border:5px gray solid; } #pic6{ position:relative; top:150px; } .title1 h3, .title3 h3 { text-indent: -9999px; height: 0; margin: 0; padding: 0; } .title1 { background-image: url(pic/title1.gif); background-repeat: no-repeat; height: 70px; margin-bottom: 10px; } .title3 { background-image: url(pic/title3.gif); background-repeat: no-repeat; height: 40px; margin-bottom: 10px; } #extra-img { position: absolute; top: 500px; left: 500px; width: 150px; height: 100px; background-image: url(pic/bg0.gif); background-repeat: no-repeat; z-index: 2; }body{ background-image: url(pic/bg1.jpg); font-family: Verdana, Geneva, sans-serif; font-size: 13px; color: darkgray; line-height: 1.5; margin: 0; } #father{ width:900px; background-color:white; background-image:url(pic/logo.gif); margin-left:auto; margin-right:auto; height:150px; background-repeat:no-repeat; background-position:right top; height:1100px; } #intro{ width:300px; border:1px gray dotted; margin:5px; padding:5px; float:left; } #intro img{ width:280px; height:220px; border:1px gray solid; } #scene{ width:555px; border:1px gray dotted; margin:5px; padding:5px; float:right; background-image:url(pic/bg3.jpg); margin-top:150px; position: relative; z-index: 1; } #scene img{ width:200px; height:170px; border:5px gray solid; float:left; margin-right: 10px; margin-bottom:10px; } #scene1,#scene2{ clear:both; width:450px; border-top:1px skyblue dashed; margin:10px auto; padding-top: 10px; } #food{ float:left; width:300px; border:1px gray dotted; margin-left:5px; padding:5px; clear: left; } #food img{ width:280px; height:220px; border:5px gray solid; } #pic6{ position:relative; top:150px; } .title1 h3, .title3 h3 { text-indent: -9999px; height: 0; margin: 0; padding: 0; } .title1 { background-image: url(pic/title1.gif); background-repeat: no-repeat; height: 70px; margin-bottom: 10px; } .title3 { background-image: url(pic/title3.gif); background-repeat: no-repeat; height: 40px; margin-bottom: 10px; } #extra-img { position: absolute; top: 500px; left: 500px; width: 150px; height: 100px; background-image: url(pic/bg0.gif); background-repeat: no-repeat; z-index: 2; } </style> </head> <body> <div id="father"> <div id="intro"> <div class="title1"><h3>阳朔概况</h3></div> <img class="pic1" src="pic/4.jpg" /> <p >阳朔县位桂林市区东南,隶属广西桂林市,位于漓江西岸,风景秀丽。建县始于隋开皇十年(公元590年),距今已1400余年。县城距桂林市区65公里,居住着汉、壮、瑶、回等13个民族。</p> </div><!--intro end--> <div id="scene"> <div class="title2"><h3>阳朔风光</h3></div> <img class="pic2" src="pic/2.jpg" /> <p class="text">“桂林山水甲天下,阳朔山水甲桂林”,高度概括了阳朔的自然风光在世上所占有的重要位置。“山青、水秀、峰奇、洞巧”,为天下四绝。阳朔百里山川,处处奇山秀水,自然景观与人文景观交相辉映,被誉为“中国旅游名县”。</p> <div id="scene1"> <div class="title21"><h3>阳朔漓江景区</h3></div> <img class="pic3" src="pic/1.jpg" /> <p>这一景区江水清澄见底,宛如罗带的漓江蜿蜒于苍翠雄奇的群山之间,人称“百里漓江,百里画廊”。江边名山密集、千姿百态、翠竹丛丛,村落屋宇掩映在绿树丛中,构成一幅美丽的山水长轴,宛若一道千回百转的画廊。县境自杨堤冠岩村顺江而下,主要景点有:桃源仙境、浪石胜境、仙人推磨、绣山彩壁、鸳鸯戏水、九马画山、七姐下凡、螺蛳山等二十多处。乘舟游览这一景区,好似遨游仙宫,如入梦境,“分明看见青山顶,船在青山顶上行”。</p> </div><!--scene1 end--> <div id="scene2"> <div class="title22"><h3>遇龙河景区</h3></div> <img class="pic4" src="pic/3.jpg" /> <p>遇龙河是阳朔县第二大河,全长42.5公里,至书童山汇入漓江。河两岸奇峰秀丽。竹木苍翠、水质清澈、景色宜人。主要景点有:犀牛塘、水厄风光、五指山、朝阳寨、仙桂桥、遇龙桥、归义古城遗址、汉墓群、东晕岩、八仙过海等近20处。遇龙河田园风光旅游,最适宜采用三、五成群结伴徒步的游赏方式。遇龙河水清见底,一切都是静悄悄的,偶有飞鸟鸣聚,水车吱吱呀呀,旅游者可感受真正“诗境家园”的意韵。</p> </div><!--scene2 end--> </div><!--scene end--> <div id="food"> <div class="title3"><h3>美食</h3></div> <img class="pic5" src="pic/7.jpg" /> <p>漓江啤酒鱼:不吃不知道,一吃吓一跳,大名如雷贯耳,如果不试一下就真的枉费到此一游。啤酒鱼有点像川菜中火锅鱼的做法,先把鱼在油里煎一煎,再放啤酒及各种调料烧制而成。烧的器具很特别,鱼放在一个平底的盘子里,盘子下面是一个盆子,放了些水,再下面才是火,而不像是川菜火锅直接将锅放在炉火上面。这样上面的鱼不易烧糊且受热均匀,入口果然鲜辣可口,无一丝鱼本身的腥味。对了,一定要吃带鳞的,正宗的啤酒鱼,鱼鳞都炸得非常脆。好吃极了。</p> </div><!--food end--> </div><!--father end--> </body> </html> 为什么bg0不能显示
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11-06
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