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English to Chinese: Jitter General field: Tech/Engineering Detailed field: Electronics / Elect Eng
Source text - English Phase-locked loops are frequently used to multiply a reference clock up to a higher frequency, as shown in Figure 7.
In theory, the jitter at the output is equal to the jitter on the reference clock multiplied by the divide ratio (in this case, N/R), within the loop bandwidth.
Well outside the loop bandwidth, the jitter should be determined by the jitter of the loop’s VCO.
However, the theory can break down if some other source of jitter, such as power supply noise, creeps into the design.
Translation - Chinese 锁相环常用于将参考时钟倍频，产生一个更高频率的时钟，如图7所示。
English to Chinese: Cloud Computing General field: Tech/Engineering Detailed field: IT (Information Technology)
Source text - English What is ‘cloud computing’?
Many people are confused as to exactly what cloud computing is, especially as the term can be used to mean almost anything. Roughly, it describes highly scalable computing resources provided as an external service via the internet on a pay-as-you-go basis. The cloud is simply a metaphor for the internet, based on the symbol used to represent the worldwide network in computer network diagrams.
Economically, the main appeal of cloud computing is that customers only use what they need, and only pay for what they actually use. Resources are available to be accessed from the cloud at any time, and from any location via the internet. There’s no need to worry about how things are being maintained behind the scenes - you simply purchase the IT service you require as you would any other utility. Because of this, cloud computing has also been called utility computing, or ‘IT on demand’.
This new, web-based generation of computing utilises remote servers housed in highly secure data centres for data storage and management, so organisations no longer need to purchase and look after their IT solutions in-house.
Translation - Chinese 什么是`云计算’ ？