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OBJECTIVE To evaluate the impact of RA on work capacity and identify factors related to work capacity impairment in patients with RA. METHODS A cross-sectional multicentre study was performed in 21 tertiary care hospitals across China. A consecutive sample of 846 patients with RA was recruited, of which 589 patients of working age at disease onset(More)
With the severe shortage of agricultural water resources, the model of integrated controlling surface water and ground water has been designed based on the greatest economic benefit. In terms of the crop subsystem, the dynamic planning model was designed in the condition of single crop irrigated inadequately, based on the function between crops and water(More)
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