The results showed that the composites exhibited percolation threshold effect and positive temperature coefficient effect.

实验结果表明：复合材料具有明显的渗滤效应及正温度系数效应。

youdao

The results show that the composite exhibits percolation threshold effect, positive temperature effect and nonlinear volt ampere characteristics.

实验结果表明，材料具有明显的渗滤效应、正温度系数效应和非线性伏安特性。

youdao

Fitting a positive temperature coefficient part (PTC) was very useful to improve the overcharge performance and short circuit safety performance.

在电池内装置正温度系数端子(PTC)，可提高电池的耐过充性和短路安全性。

youdao

dS/dV And that, now, we know must equal dS/dV, with a positive sign. At constant temperature.

我们知道这个等于恒定温度下的，符号为正。

麻省理工公开课 - 热力学与动力学课程节选

In other words, T surrounding dS has to be greater than zero, and of course temperature is always positive.

换句话说这就意味着，环境温度T乘以dS必须大于零，当然环境温度T是正的。

麻省理工公开课 - 热力学与动力学课程节选

Above some temperature is going to be positive, below some temperature is going to be negative.

低于这一温度它是负数，我们一般忽略这些高阶项。

麻省理工公开课 - 热力学与动力学课程节选

The likely reason for that failure is that while the models recognize that increased CO2 itself will not produce a big, catastrophic increase in global temperatures, the models assume that the very small amount of warming caused by increased CO2 will result in much larger temperature increases caused by positive feedbacks.

FORBES: Fakegate: The Obnoxious Fabrication of Global Warming

Analysis in the 70s and 80s variously suggested that high pressure, high temperature and low humidity were associated with positive emotions - basically, nice weather seemed to put people in a good mood.

BBC: Does sunshine make us happier?

What is the temperature rise, after the effects of both positive and negative feedbacks, from a doubling of atmospheric CO2-e?

FORBES: Not Quite Professor Krugman, Not Quite