Meiyi Huo

Abstract Driven by the dual-carbon goals, the number of electric vehicles (EVs) in China has maintained a rapid growth. Large-scale uncoordinated charging of EVs poses severe challenges to the safe and stable operation of active distribution networks (ADNs). To realize the cooperative optimization between EV charging loads and ADNs, this paper proposes a flexible regulation method for EV charging loads based on demand response.

Abstract Many electric vehicles (EVs) are being connected to the power grid. Large-scale charging increases the gap between peak and off-peak loads. A coordinated charge–discharge schedule is proposed for large-scale EVs in vehicle-to-grid (V2G) mode. The goal is to reduce load variance, peak–valley difference on the load curve, and the cost of network losses. EV power limits, grid supply limits, and load conditions are included as constraints.

Abstract Low back pain (LBP) is one of the world's most prevalent health issues. Patients with LBP experience various intensities and durations of symptoms, which can lead to distinctive course patterns commonly described as symptom trajectories. This study aimed to investigate the association between different amounts of physical activity and sedentary behavior and the trajectory of LBP, in people with a lifetime history of LBP.