A "1" is indicated by a data pulse, occurring in the middle of the bit cell interval.

数据“1”则表示在单元间隔的中间有数据脉冲的存在。

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These researchers were encoding digital data by varying the intensity of a pulse of light. For example, high intensity would represent a 1 and low intensity would represent a 0.

这些研究者通过改变光脉冲的强度来重编电码，比如，用高强度来表示1低强度来表示0。

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The 4D means four data symbols (two bits), the PAM5 is Pulse Amplitude Modulation with five signal levels.

4D指四个数据符（2比特），PAM5表示分5个层级的脉冲幅度调制。

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Together with Data Center Pulse, an association of data center professionals representing individuals from over a 1, 000 companies in 66 countries including Google, Oracle, Twitter and Adobe, eBay began efforts to change the law.

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This more recent data--courtesy of Spending Pulse, the economic research arm of MasterCard (nyse: MA - news - people ) WorldWide--divides U.S. consumer discretionary spending into eight buckets: air travel, e-commerce, electronics, furniture, lodging (as in hotels, not primary residences), apparel, luxury (excluding jewelry) and restaurants.

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It takes about an hour to collect and aggregate the data ( view a demonstration of a light pulse as it travels through an ordinary Coca-Cola bottle).

CNN: A camera that can see around corners