上行效应：“自下而上”则主张，较低营养阶层的生物密度、生物量等（由资源限制）决定较高营养阶层的种群结构，亦成为上行效应。
但HFC网络中同轴电缆网络上行信道中存在的噪声漏斗效应限制了上行信道调制技术的选择。
But the existence of noise funneling in the return path of cable network in HFC system restricts the selection of modulation techniques for the return path.
欧元区经济还将面临的一个上行风险是，西班牙和爱尔兰等国虚高的房价可能会出现一次大幅修正，从而对其他经济领域产生重大的连锁效应。
There is also an increased risk that overvalued housing markets in countries such as Spain and Ireland could see a sharp correction, with significant knock-on effects for the rest of the economy.
而在上行巷道中则同时存在着节流效应和浮力效应，并且随着热释放功率的增大，节流效应更加明显。
While both the throttling and buoyancy effects exist in the uplink tunnel, and the throttling effect is increased obviously with the power of heat release increasing.
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