In view of the light-emitting diode (LED) and its life prediction. despite its currently wide use. IES TM-21-11 parametric life prediction method is incapable to extrapolate under multidimensional conditions (include working environmental conditions). This paper presents a multidimensional back propagation-neural network (BP-NN) based life prediction method which considers different d... https://fitnessgravesyardes.shop/product-category/left-crank-arm/