The accurate prediction of electricity-heat-cooling-gas loads on the demand side in the integrated energy system (IES) can provide significant reference for multiple energy planning and stable operation of the IES. This paper combines the multi-task learning (MTL) method. the Bootstrap method. the improved Salp Swarm Algorithm (ISSA) and the multi-kernel extreme learning machine (MKEL... https://parisnaturalfoodes.shop/product-category/ester-c-500mg-wildberry/