Applying structural approach to modeling default risk, the pricing of default risk zero-coupon bond and a credit spread term structure under incomplete information is developed.

运用违约风险评估的结构化建模方法，在信息不完全的情形下推导了风险零息票债券的定价公式，并得到了此时信用利差的期限结构。

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This paper introduces an AFC algorithm for a zero-intermediate frequency direct-sequence spread spectrum digital receiver.

为了使得射频源和波导管的频率保持一致 ，采用了自动频率控制系统 （AFC）。

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Results: The policy of zero-difference sale of essential drugs was good for the spread of the essential drugs.

结果：基本药物“零差价”等政策的推行，有益于基本药物普及。

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The world needs such simple to make easy to fly safe anti stall zero crash craft to be able to spread out to currently unpopulated areas and to increase the agricultural land we can use which would take the load off current city and town infrastructure.

FORBES: My Ten Point Plan For Social Entrepreneurs to Change the World