【正文】 9。it is a collection of millions of cars designed for utilization by a mass fact, we could argue that the modern automobile is a giant technological system that entails a way of economies depend on this design the ponents, machinists manufacture the ponents, assemblers assemble the ponents into plete systems, truck drivers deliver the assembled product, and salesmen sell the product to the brief description does not even account for the officeworkers who handle logistics and maintain financial accounts, or the separate panies that mine raw materials or design and manufacture the needed machine would the economy of the United States be like without the modern automobile?Obviously, the modern automobile and self propelled vehicle are necessarily the ：在任何證據(jù)被介紹來(lái)支持這個(gè)主題以前，必須建立發(fā)明的定義。Maurice Fabre的《陸運(yùn)的歷史》(1963)提供了一個(gè)有趣的汽車和其發(fā)明者?！霸?001年,我們認(rèn)為什么是汽車呢?我請(qǐng)讀者花一分鐘的時(shí)間往窗外看。這些汽車具有相似的形狀和大小。這個(gè)是在告訴我們什么是關(guān)于現(xiàn)代的汽車嗎?現(xiàn)代汽車不是單獨(dú)的車輛,它是一個(gè)收集數(shù)百萬(wàn)輛汽車設(shè)計(jì)利用的大規(guī)模市場(chǎng)。工程師設(shè)計(jì)組件,機(jī)械師制造部件,組裝成完整的系統(tǒng)組裝元件,卡車司機(jī)提供產(chǎn)品的組裝、銷售人員賣產(chǎn)品到群眾。如果沒有現(xiàn)代汽車美國(guó)的經(jīng)濟(jì)將會(huì)怎么樣呢？顯然，現(xiàn)代汽車和自行式車輛必須是一樣的。s work, life and , control this technology and then seem to be more to deliver the I mainly introduce some knowledge of the 3G GPRS, TDSCDMA，WCDMA , EDGE ,CDMA2000 , WAP , SYMBIAN G, the third Generation, known as the Chinese meaning is refers to the third Generation of digital growth of the global 3G was rapidly in recent 2002 to 2008, the 3 G operators have been gradually from the original is pale and management to the accelerated June 2008, global 3 G users accumulative total up to 709 million, the total 84 countries and regions issued 3 G licenses, including effective certificate for 249 country of 3 G development is relatively later than the advanced 2009, China was officially forward 3 G the economic crisis of the downturn state，China39。s mobile networks, 3G will significantly boost network capacityAt home 3G is going to affect our home and social lives in many services that 3G enables will help us to manage our personal information, simplify tasks such as grocery shopping, make better use of our time and offer services that are just fun to will be able to develop myriad new service opportunities to attract and retain new are some examples:re sitting on a train and use this “dead” time to log on to your bank account, check your balance and pay a few billsAt work3G will not just support the needs of businesspeople who travel a lot, but will also help new, flexible working practices, such as homeworking and remote access to corporate networks outside traditional working are often highvolume airtime users, so they represent a big opportunity for mobile are some examples:You are on the road, and urgently need to discuss a draft presentation with a number of colleagues back in the into a service station, you use your 3G device to hold a telephone conference with your colleagues and, at the same time, you can all view the draft presentation and make changes on line.s premises and hits a his 3G device, he contacts his department and downloads a demonstration video that guides him through the repair 3G brings together two powerful forces: wideband radio munications and IPbased , these lay the groundwork for advanced Mobile Internet services, including personalized portals, “infotainment”, mobile merce and unified messagingenpassing highspeed data, superior quality voice and video and locationbased 3G a reality depends on technology developments in different includeamendments to the radio interface to support wideband munications and in the core technologies, such as WAP and Bluetooth, also have an important role to section provides a brief overview of some of the main technologies and developments supports all of these technologies and has played an active role in their development.Faster data speeds and “always on” mobility Connection to an abundance of data sources around the world, through support for multiple protocols, including IPTDSCDMA All called Time DivisionSynchronous CDMA , this standard is formulated by mainland China alone the 3 G June 29, 1999, the China tele science and technology and telemunications research institute(Datang Tele)to the ITU, but technical invention father put forward in Siemens has the characteristics of low radiation, known as the green 3 standard will intelligent wireless, synchronous CDMA and software radio today the international leading technology into which, in spectrum use efficiency, the business support for flexibility, frequency flexibility and cost, and other aspects of the unique addition, because of the huge market in China, the standard by the major telemunications equipment manufacturer to the attention of the world, more than half of the equipment factory now announced that can support TDSCDMA standard is made after of the intermediate links, and the generation of directly to the 3 G transition, so it is suitable to GSM system to 3 G to munication network is the core of TDSCDMA task.EDGEEnhanced Data Rates for Global Evolution(EDGE)enables GSM and TDMA operators to offer 3G services using existing network making changes and additions to standardization of evolutionary phases of the air interface and the backbone networks, as well as the migration to ALLIP and multimedia networks.BluetoothBluetooth is an open standard for twoway, shortwave radio munications between different marks the end of cables and cords between mobile phones, palmtops, portable PCs and printers, for , Bluetooth enables information between such devices to be information held on a PDA can be updated automatically when within range of a Bluetoothenab