Nowadays manufacturers are facing fierce challenge.Apart from the products,providing customers with multiple maintenance options in the service contract becomes more popular,since it can help to improve customer satis...Nowadays manufacturers are facing fierce challenge.Apart from the products,providing customers with multiple maintenance options in the service contract becomes more popular,since it can help to improve customer satisfaction,and ultimately promote sales and maximize profit for the manufacturer.By considering the combinations of corrective maintenance and preventive maintenance,totally three types of maintenance service contracts are designed.Moreover,attractive incentive and penalty mechanisms are adopted in the contracts.On this basis,Nash non-cooperative game is applied to analyze the revenue for both the manufacturer and customers,and so as to optimize the pricing mechanism of maintenance service contract and achieve a win-win situation.Numerical experiments are conducted.The results show that by taking into account the incentive and penalty mechanisms,the revenue can be improved for both the customers and manufacturer.Moreover,with the increase of repair rate and improvement factor in the preventive maintenance,the revenue will increase gradually for both the parties.展开更多
在寒潮天气下山区风机覆冰期预测困难,造成风电功率预测偏差大,而精确的风机气温预测是提升覆冰期预测准确率的关键。由于气温的异质性和波动性,单个模型较难适应不同风电场的气温预测需求,提出一种多模式融合的风机气温预测方法(multi-...在寒潮天气下山区风机覆冰期预测困难,造成风电功率预测偏差大,而精确的风机气温预测是提升覆冰期预测准确率的关键。由于气温的异质性和波动性,单个模型较难适应不同风电场的气温预测需求,提出一种多模式融合的风机气温预测方法(multi-mode fusion fan temperature prediction method,MMTP),通过AHP-独立性权法-熵值法的组合权重法,集成多种人工智能算法,不仅提高了预测的普适性,还能实现不同模式优势互补。仿真结果表明:该方法能有效地提升气温预测准确率,48 h预报时效内比单一模式预报误差平均降低约8%;采用该方法进行气温订正后,风机覆冰期预报准确率显著提高,覆冰期预报误差减小了3~6 h。展开更多
目的观察显微镜辅助下颈椎前路椎间盘切除融合内固定术(anterior cervical discectomy and fusion,ACDF)联合高速磨钻治疗孤立型颈椎后纵韧带骨化症(ossification of posterior longitudinal ligament,OPLL)的临床疗效及有效性。方法回...目的观察显微镜辅助下颈椎前路椎间盘切除融合内固定术(anterior cervical discectomy and fusion,ACDF)联合高速磨钻治疗孤立型颈椎后纵韧带骨化症(ossification of posterior longitudinal ligament,OPLL)的临床疗效及有效性。方法回顾性分析2018年1月~2020年12月本院骨科诊治的孤立型后纵韧带骨化症患者28例,均在显微镜辅助下联合高速磨钻行颈椎前路ACDF手术,其中男13例,女15例;年龄40~65岁;C_(3-4)3例,C_(4-5)8例,C_(5-6)7例,C_(6-7)10例。对患者术前及术后1年进行相关指标评价,同时观察患者术后出现的相关并发症。结果所有患者均获得随访,术后1年JOA评分、NDI评分、颈椎VAS评分均较术前显著改善,差异有统计学意义(P<0.05)。3例患者因后纵韧带骨化和硬膜黏连严重,用超声骨刀将其打薄后漂浮,未行彻底切除。术后患者未出现喉返神经、喉上神经损伤,无脊髓损伤及脑脊液漏。结论显微镜辅助下ACDF联合高速磨钻治疗孤立型后纵韧带骨化症,可较好地改善患者神经功能,取得较好的临床疗效,术中操作安全性高。展开更多
基金supported by the National Natural Science Foundation of China(71671035)。
文摘Nowadays manufacturers are facing fierce challenge.Apart from the products,providing customers with multiple maintenance options in the service contract becomes more popular,since it can help to improve customer satisfaction,and ultimately promote sales and maximize profit for the manufacturer.By considering the combinations of corrective maintenance and preventive maintenance,totally three types of maintenance service contracts are designed.Moreover,attractive incentive and penalty mechanisms are adopted in the contracts.On this basis,Nash non-cooperative game is applied to analyze the revenue for both the manufacturer and customers,and so as to optimize the pricing mechanism of maintenance service contract and achieve a win-win situation.Numerical experiments are conducted.The results show that by taking into account the incentive and penalty mechanisms,the revenue can be improved for both the customers and manufacturer.Moreover,with the increase of repair rate and improvement factor in the preventive maintenance,the revenue will increase gradually for both the parties.
文摘在寒潮天气下山区风机覆冰期预测困难,造成风电功率预测偏差大,而精确的风机气温预测是提升覆冰期预测准确率的关键。由于气温的异质性和波动性,单个模型较难适应不同风电场的气温预测需求,提出一种多模式融合的风机气温预测方法(multi-mode fusion fan temperature prediction method,MMTP),通过AHP-独立性权法-熵值法的组合权重法,集成多种人工智能算法,不仅提高了预测的普适性,还能实现不同模式优势互补。仿真结果表明:该方法能有效地提升气温预测准确率,48 h预报时效内比单一模式预报误差平均降低约8%;采用该方法进行气温订正后,风机覆冰期预报准确率显著提高,覆冰期预报误差减小了3~6 h。
文摘目的观察显微镜辅助下颈椎前路椎间盘切除融合内固定术(anterior cervical discectomy and fusion,ACDF)联合高速磨钻治疗孤立型颈椎后纵韧带骨化症(ossification of posterior longitudinal ligament,OPLL)的临床疗效及有效性。方法回顾性分析2018年1月~2020年12月本院骨科诊治的孤立型后纵韧带骨化症患者28例,均在显微镜辅助下联合高速磨钻行颈椎前路ACDF手术,其中男13例,女15例;年龄40~65岁;C_(3-4)3例,C_(4-5)8例,C_(5-6)7例,C_(6-7)10例。对患者术前及术后1年进行相关指标评价,同时观察患者术后出现的相关并发症。结果所有患者均获得随访,术后1年JOA评分、NDI评分、颈椎VAS评分均较术前显著改善,差异有统计学意义(P<0.05)。3例患者因后纵韧带骨化和硬膜黏连严重,用超声骨刀将其打薄后漂浮,未行彻底切除。术后患者未出现喉返神经、喉上神经损伤,无脊髓损伤及脑脊液漏。结论显微镜辅助下ACDF联合高速磨钻治疗孤立型后纵韧带骨化症,可较好地改善患者神经功能,取得较好的临床疗效,术中操作安全性高。
