目的:检索并筛选稳定期慢性阻塞性肺疾病自我管理干预相关证据。方法:系统检索UpToDate、BMJ最佳临床实践、JBI、Cochrane Library、Pubmed、Web of Science、Embase、医脉通、中国知网、CBM、万方、维普等数据库及指南网中关于稳定期...目的:检索并筛选稳定期慢性阻塞性肺疾病自我管理干预相关证据。方法:系统检索UpToDate、BMJ最佳临床实践、JBI、Cochrane Library、Pubmed、Web of Science、Embase、医脉通、中国知网、CBM、万方、维普等数据库及指南网中关于稳定期慢性阻塞性肺疾病自我管理干预的指南等证据。由2名研究者进行文献质量评价,结合专家会议审核证据并给出级别推荐。结果:共纳入13篇文献,在稳定期COPD自我管理干预目标、干预原则、评估内容、自我管理干预内容、随访教育、应急管理6方面提取并形成23条相关证据。结论:稳定期慢性阻塞性肺疾病病人自我管理干预证据内容丰富,医护人员需根据医院实际,考虑病人意愿,科学制定干预决策,从而改善病人健康状况。展开更多
Multi-level pressure source system is a novel hydraulic system with distinct advantage of energy saving. In order to balance each pressure level of the multi-level pressure source system, a pump motor energy transfer ...Multi-level pressure source system is a novel hydraulic system with distinct advantage of energy saving. In order to balance each pressure level of the multi-level pressure source system, a pump motor energy transfer unit is usually equipped. However, the pump motor energy transfer has the characteristics of poor starting and low response, which cause long time of pressure adjustment and large pressure jitter when the transformer is switched to system suddenly and the motor-side pressure has pressure impact when rail of the pump-side is switched. To address these problems, this paper proposes a compound control strategy of feedforward compensation control with Fuzzy-PID to improve the controllability of the multi-level pressure source system. A test rig of the pump motor energy transfer unit is built and the controllability of compound controller and PID controller are compared. The experiment results show that, compared with the traditional PID, the adjustment time and the pressure impact are reduced by 20% and 25% with the proposed compound control strategy. Therefore, the presented compound control strategy can be used to improve starting performance and robustness of the pump motor energy transfer unit control system.展开更多
文摘目的:检索并筛选稳定期慢性阻塞性肺疾病自我管理干预相关证据。方法:系统检索UpToDate、BMJ最佳临床实践、JBI、Cochrane Library、Pubmed、Web of Science、Embase、医脉通、中国知网、CBM、万方、维普等数据库及指南网中关于稳定期慢性阻塞性肺疾病自我管理干预的指南等证据。由2名研究者进行文献质量评价,结合专家会议审核证据并给出级别推荐。结果:共纳入13篇文献,在稳定期COPD自我管理干预目标、干预原则、评估内容、自我管理干预内容、随访教育、应急管理6方面提取并形成23条相关证据。结论:稳定期慢性阻塞性肺疾病病人自我管理干预证据内容丰富,医护人员需根据医院实际,考虑病人意愿,科学制定干预决策,从而改善病人健康状况。
基金Supported by the National Natural Science Foundation of China(No.51575471)the Key Project of Science and Technology Plan of Higher Education of Hebei Education Department(No.ZD2017077)
文摘Multi-level pressure source system is a novel hydraulic system with distinct advantage of energy saving. In order to balance each pressure level of the multi-level pressure source system, a pump motor energy transfer unit is usually equipped. However, the pump motor energy transfer has the characteristics of poor starting and low response, which cause long time of pressure adjustment and large pressure jitter when the transformer is switched to system suddenly and the motor-side pressure has pressure impact when rail of the pump-side is switched. To address these problems, this paper proposes a compound control strategy of feedforward compensation control with Fuzzy-PID to improve the controllability of the multi-level pressure source system. A test rig of the pump motor energy transfer unit is built and the controllability of compound controller and PID controller are compared. The experiment results show that, compared with the traditional PID, the adjustment time and the pressure impact are reduced by 20% and 25% with the proposed compound control strategy. Therefore, the presented compound control strategy can be used to improve starting performance and robustness of the pump motor energy transfer unit control system.
