Aimed at the jet noise which is induced by the expand structure and tail tube in the resistant muffler, a finite element model at low Mach number was developed.

针对抗性消声器中扩张结构和尾管引起的射流噪声问题，建立了低马赫数射流噪声有限元分析模型。

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Lasers vary in type, but one major brand, Waterlase, works by heating water molecules in the tooth, which then expand and dislodge decayed tooth structure, according to manufacturer Biolase Inc.

WSJ: To Cut Tooth Decay: A Laser vs. a Drill

Smith has an opportunity to learn from the impressive success of Medicaid reform under Gov. Mitch Daniels of Indiana, in which Indiana was actually able to expand coverage by shifting the structure of Medicaid insurance from the traditional, World War II model to a modern, consumer-driven one.

FORBES: Could the Wisconsin Union Standoff Trigger Significant Medicaid Reform?

This has created companies with the motive to expand, a clear-enough governance structure to allow for a strategy of expansion, and the currency with which to buy another exchange.

ECONOMIST: The prospect of a transatlantic merger is long overdue