無(wú)線局域網(wǎng)-計(jì)算機(jī)畢業(yè)論文外文翻譯-全文預(yù)覽
【正文】 Second,the wireless PDA ordering mode: it uses a wireless WiFi technology, a la carte interface by PDA display, use touch pen to plete the ordering process, virtually anywhere, anytime to order realtime response, this model is more suitable for dishes and practices simple restaurant, features a restaurant and special mood of senior restaurants. Third, the wireless ordering Po mode: it uses the ISM band, can be a floor or other obstruction in the case of seamless coverage up to 10 meters away, while the signal remained stable, which is the ratio of the wireless PDA ordering model39。 backstage manager of inquiry。). It includes operating systems, user interface and applications mobile phone work required by the software, but there is no past, the exclusive right to impede innovation and barriers to mobile industry, called mobile terminal is the first to create a truly open and plete mobile software. Google and Open Handset Alliance to develop the Android, the alliance by including China Mobile, Motorola, Qualm and TMobile, including more than 30 technology and the position of a leader in wireless applications. Google with operators, equipment manufacturers, developers and other interested parties to form deeplevel partnerships, hoping to establish a standardized, open software platform for mobile phones in the mobile industry to form an open ecosystem . It uses software stack layers (software stack, also known as the software stack) architecture, is divided into three parts: the core of the underlying Linuxbased language developed by the c, only basic functions. Middle layer consists of library. Library and Virtual Machine Virtual Machine, developed by the C +. At the top are a variety of applications, including the call procedures, SMS procedures, application software is developed by the panies themselves to write java.To promote this technology, Google, and dozens of other phone pany has established the Open Handset Alliance (Open Handset Alliance).Characteristicl application framework to support ponent reuse and replacementl Dalvik virtual machine specifically for mobile devices is optimizedl Internal integrated browser, the browserbased opensource WebKit enginel optimization of 2D and 3D graphics library includes graphics library, 3D graphics library based on OpenGL ES (hardwareaccelerated optional)l SQLite for structured data storagel Multimedia support includes the mon audio, video and static image file formats (such as MPEG4, , MP3, AAC, AMR, JPG, PNG, GIF)l GSM phone (depending on hardware)l Bluetooth Bluetooth, EDG
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