The paper analyses three types of two-dimensional optical code-division multiple access communication systems: T/ S OCDMA 、 WDM+ OCDMA 、 MW OCDMA, and compares their performance.

To use the bikes, one has to press a button at the station and then scan a QR code with a mobile phone.

使用“e电车”需按下停车桩上的按钮，然后用手机扫描二维码。

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They only use the codes when they hand in their work, which doesn't take them too much time.

他们只有在交作业的时候才使用这个二维码，这不会占用他们太多时间。

中考真题- 2018 衡阳 阅读理解

Analysis of the QR code encoding and decoding algorithm and error correction mechanism, implementing the RS error correction algorithm in the QR Code. 3.

分析了QR二维码的编码译码算法及纠错机制，实现了QR码中的RS纠错算法。

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When Guo scans his students' QR codes, their homework appears on his phone.

当郭扫描学生的二维码时,他们的作业会出现在他的手机上。

中考真题- 2018 衡阳 阅读理解

WeChat offered speedier in-app news articles long before Facebook, developed a walkie-talkie function before WhatsApp, and made major use of QR codes well before Snapchat.

微信推出应用内即时新闻比Facebook早很多，它还在WhatsApp之前开发出了对讲功能，在Snapchat之前开始大量使用二维码。

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There and in Europe, near field communication ( NFC) payments, which involve swiping a phone over a chip reader, are preferred to QR codes.

在美国和欧洲，近场通信（NFC）支付（把手机在芯片读取器上刷一下）比二维码更受欢迎。

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The barcode recognition which plays an important role in automatic identification technology is going from one-dimensional code recognition to two-dimensional code recognition.

在自动识别技术中占据重要地位的条码识别也正在进行着从一维码识别到二维码识别的过度。

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Fundamental recognition is a main problem in the 2-Dimensional bar codes.

基元识别是二维码图像识别中的一个关键问题，提出了基于遗传算法的QR码识别方法。

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Clearly, so-called QR codes small square patterns that look like Cubist renderings of a traditional barcode ( right) have become ubiquitous.

显而易见，这类所谓的二维码（QR code，Quick Response code）现如今已随处可见，它采取小小的正方形图案，看起来就像用立体表现的传统条码。

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Construction and Realization of MPC/ OOC on W-OCDMA System

W-OCDMA系统中MPC/OOC二维码的构造及实现

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Created by a Toyota ( TM) subsidiary in the mid-1990s to track auto parts, QR codes were designed to deliver more information than the traditional barcode.

上世纪90年代中期，丰田公司（Toyota）的一家子公司为了追踪汽车配件而发明了二维码。问世之初，二维码提供的信息就多于传统条码。

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And vibe used the codes in fashion spreads to send readers to sites where they could buy clothes pictured in the magazine.

美国娱乐杂志Vibe则在跨页时尚广告中使用二维码，读者凭此即可登录一些站点，购买该杂志图片推介的服装。

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Of the two I tested, only one worked with my iPhone, but thankfully the app allows for manual entry of the unit's unique key.

我测试了两台Protect，但我的iPhone只扫出了其中一台的二维码，好在另一台也可以通过手工输入产品验证码来验证。

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The fair's organizing committee said an employee mistakenly hit the "forward" button, instead of the "reverse" one, leading to the accident.

展会组织者称，工作人员误将“前进键”当成“后退键”操作导致了这次事件。

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To view one of the last nine pages you visited in this session, click the arrow to the side of the back or forward button, and then click the page you want from the list.

要查看在这次会话中访问过的最后九页，请单击“后退”或“向前”按钮旁边的箭头，然后从列表单击所需的网页。

provided by jukuu

All you need is an index finger ( or any firm object) so that you can press the forward button-or to click retweet on Twitter.

只要动动食指（或者任何坚硬物体）按下转发键就行了——或者在Twitter上点一下“转贴”按钮即可。译者：倪卫国

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To see a list of the last few pages you visited, click the small down arrow beside the Back or Forward button.

要查看刚才访问的网页列表，请单击后退或前进按钮旁边的向下小箭头。

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If we click backward through the stack, the forward button lights up.

如果在堆栈中回退，前进按钮就变亮了。

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She hit the fast forward button again.

崔茜卡再次按下快进。

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As you surf to new pages, the forward button again becomes dim.

浏览新的页面时，前进按钮再次变成灰色。

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