Sea-based rocket launches encounter significant challenges stemming from dynamic marine environmental interactions.During the hot launch phase,characterized by low-velocity ascent,the departure of the rocket from the ...Sea-based rocket launches encounter significant challenges stemming from dynamic marine environmental interactions.During the hot launch phase,characterized by low-velocity ascent,the departure of the rocket from the oscillatory platform exhibits heightened sensitivity to external disturbances.In the development stage,assessing the launch dynamics and the clearance between the rocket and framed launcher are crucial for improving the reliability of sea-based rocket launches in rough sea conditions.This study presents a high-fidelity dynamic model of maritime hot launch system,demonstrating 3.21%prediction error through rigorous validation against experimental datasets from comprehensive modal analyses and the full-scale rocket flight test.To mitigate collision risks,we develop a computational method employing spatial vector analysis for dynamic measurement of rocket-launcher clearance during departure.Systematic investigations reveal that in rough sea conditions,optimal departure dynamics are achieved at θ_(thrust)=270°nozzle azimuth configuration,reducing failure probability compared to conventional orientations.The developed assessment framework not only resolves critical safety challenges in current sea launch systems but also establishes foundational principles for optimizing adapter axial configuration patterns in future designs.展开更多
针对高速公路机电设备分布广、数据采集滞后及维护效率低等问题,提出一种基于近场通信(Near Field Communication,NFC)的智能化运维技术。通过近场激活、数据双向交互及访问控制机制,实现高效巡检与异常处理。实验结果表明,该技术在通...针对高速公路机电设备分布广、数据采集滞后及维护效率低等问题,提出一种基于近场通信(Near Field Communication,NFC)的智能化运维技术。通过近场激活、数据双向交互及访问控制机制,实现高效巡检与异常处理。实验结果表明,该技术在通信时延、数据完整性及维护响应效率方面表现优异,显著提高了高速公路机电设备运维的智能化水平。展开更多
呼吸与危重症医学科(pulmonary and critical care medicine,PCCM)专科医师培训是培养高素质、高水平PCCM专科人才的重要途径。PCCM是一门涵盖范围广,疾病分类复杂的实践性学科。典型教学病例库是现代医学教育模式下的一种全新教学方式...呼吸与危重症医学科(pulmonary and critical care medicine,PCCM)专科医师培训是培养高素质、高水平PCCM专科人才的重要途径。PCCM是一门涵盖范围广,疾病分类复杂的实践性学科。典型教学病例库是现代医学教育模式下的一种全新教学方式。该院通过典型案例的教学,能够激发专培医师的主动性和积极性,提高其临床思维、临床实践、临床科研和团队协作能力。展开更多
慕课(massive open online courses,MOOCs)作为信息教育时代一种新型的教育模式,改变了传统授课的模式,具有开放性、共享性、满足个性化需求的优势,实现了与传统教学模式的融合与互补,有助于发挥医学生的学习主观能动性,培养临床思维能...慕课(massive open online courses,MOOCs)作为信息教育时代一种新型的教育模式,改变了传统授课的模式,具有开放性、共享性、满足个性化需求的优势,实现了与传统教学模式的融合与互补,有助于发挥医学生的学习主观能动性,培养临床思维能力,提高教学质量。在呼吸系统整合课程中引入慕课,可利用国内外高校的精品课程,较好地整合教学资源,弥补实际教学中的不足,缩小教育资源和教学水平的地方差异。学生在自我评价方面,在自我管理、病案分析、团队协作等能力在慕课教学中均得到提升,对慕课的总体学习体验感到满意。同时,慕课教学也对教师的教学能力、医学院校的软硬件投入、学生的自学能力提出了更高的要求。文章结合慕课,探讨在呼吸系统整合课程教学中应用的可行性,从慕课在呼吸系统整合课程中的优势、慕课的指标评价体系、慕课所面临的机遇和挑战等方面,分析对教学模式的影响,发挥优势,避免劣势,为整合系统课程的教学改进给予建议,在教学实践中提供新思路。展开更多
基金the experimental technology support provided by the China Academy of Launch Vehicle Technology
文摘Sea-based rocket launches encounter significant challenges stemming from dynamic marine environmental interactions.During the hot launch phase,characterized by low-velocity ascent,the departure of the rocket from the oscillatory platform exhibits heightened sensitivity to external disturbances.In the development stage,assessing the launch dynamics and the clearance between the rocket and framed launcher are crucial for improving the reliability of sea-based rocket launches in rough sea conditions.This study presents a high-fidelity dynamic model of maritime hot launch system,demonstrating 3.21%prediction error through rigorous validation against experimental datasets from comprehensive modal analyses and the full-scale rocket flight test.To mitigate collision risks,we develop a computational method employing spatial vector analysis for dynamic measurement of rocket-launcher clearance during departure.Systematic investigations reveal that in rough sea conditions,optimal departure dynamics are achieved at θ_(thrust)=270°nozzle azimuth configuration,reducing failure probability compared to conventional orientations.The developed assessment framework not only resolves critical safety challenges in current sea launch systems but also establishes foundational principles for optimizing adapter axial configuration patterns in future designs.
文摘针对高速公路机电设备分布广、数据采集滞后及维护效率低等问题,提出一种基于近场通信(Near Field Communication,NFC)的智能化运维技术。通过近场激活、数据双向交互及访问控制机制,实现高效巡检与异常处理。实验结果表明,该技术在通信时延、数据完整性及维护响应效率方面表现优异,显著提高了高速公路机电设备运维的智能化水平。
文摘呼吸与危重症医学科(pulmonary and critical care medicine,PCCM)专科医师培训是培养高素质、高水平PCCM专科人才的重要途径。PCCM是一门涵盖范围广,疾病分类复杂的实践性学科。典型教学病例库是现代医学教育模式下的一种全新教学方式。该院通过典型案例的教学,能够激发专培医师的主动性和积极性,提高其临床思维、临床实践、临床科研和团队协作能力。
文摘慕课(massive open online courses,MOOCs)作为信息教育时代一种新型的教育模式,改变了传统授课的模式,具有开放性、共享性、满足个性化需求的优势,实现了与传统教学模式的融合与互补,有助于发挥医学生的学习主观能动性,培养临床思维能力,提高教学质量。在呼吸系统整合课程中引入慕课,可利用国内外高校的精品课程,较好地整合教学资源,弥补实际教学中的不足,缩小教育资源和教学水平的地方差异。学生在自我评价方面,在自我管理、病案分析、团队协作等能力在慕课教学中均得到提升,对慕课的总体学习体验感到满意。同时,慕课教学也对教师的教学能力、医学院校的软硬件投入、学生的自学能力提出了更高的要求。文章结合慕课,探讨在呼吸系统整合课程教学中应用的可行性,从慕课在呼吸系统整合课程中的优势、慕课的指标评价体系、慕课所面临的机遇和挑战等方面,分析对教学模式的影响,发挥优势,避免劣势,为整合系统课程的教学改进给予建议,在教学实践中提供新思路。
