缓脉,一息四至,来去弛缓松懈的脉象。中医认为,若脉来均匀和缓,为平脉,是正常人的脉象。缓脉多见于湿证或脾胃虚弱。缓脉须同近似脉、迟脉、濡脉、微脉、弱脉相区别。迟脉一息不足四至;濡脉浮细而软;微脉则细而软弱,似有似无;弱脉呈沉细之象,须重按始得,与缓脉来去怠缓,不浮不沉,一息四至不同。缓脉与紧脉为相反的脉象。临床上,缓脉常同浮、沉、大、迟等脉兼见。 缓脉: 《脉诀汇辨》:“缓为胃气,不止于病,取其兼见,方可断证。浮缓伤风,沉缓寒湿,缓大风虚,缓细湿痹,缓涩脾薄,缓弱气虚。”
感染中毒症状,相对缓脉,玫瑰疹少见;
Infective intoxication, relative bradycardia and roseola were not common.
研究表明,在色散缓变光纤中利用拉曼自散射效应与负三阶色散效应的相互作用,可以获得更高压缩比的超短光脉。
The enhanced compression of fundamental femtosecond solitons can be obtained by combined effects of negative third order dispersion and Raman self scattering in the fibers.
计算了高斯型脉冲宽度在色散缓变光纤中的传播特性和初始啁啾对脉宽演变的影响。
The propagation characteristics and the influence of initial chirp on Gaussian pulse width were discussed.
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