Secure Zone is a mid-range derivative of the company's Secure Fence, offering its ARaD technology at a lower price.

安全区是该公司安全防护中的中介产品的衍生工具，以一个更低的价格提供了建筑设计研究技术。

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Methods the upper-lower solutions, monotone derivative methods, the maximum principle, comparison principle and principal eigenvalue theory were used.

方法采用上下解的方法、单调迭代法、比较原理、极值原理以及特征值理论进行了研究。

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Under the proposal, unveiled by EC president Jose Manuel Barroso, the FTT would be imposed on the exchange of shares and bonds at a rate not lower than 0.1 percent and on derivative contracts, at a rate not lower than 0.01 percent.

FORBES: Financial Transaction Tax Won't Help Europe Get Back On Track

Gold, and its GLD and IAU derivative ETFs, had been in a pattern of lower highs on rally attempts and lower lows on pullbacks since October, until eventually plungjng sharply several weeks ago.

FORBES: Gold Finally A Tarnished Asset After 12-Year Bull Run