能源岛汇集外送被认为是未来海上风电开发的重要模式。目前,海缆长距离输电成本高、陆上接入点受限、故障修复时间长,而电转燃料通过船舶外送的模式又存在转换效率低、海上占地大等问题。为此,提出了基于电力储能船舶的海上能源岛电力...能源岛汇集外送被认为是未来海上风电开发的重要模式。目前,海缆长距离输电成本高、陆上接入点受限、故障修复时间长,而电转燃料通过船舶外送的模式又存在转换效率低、海上占地大等问题。为此,提出了基于电力储能船舶的海上能源岛电力外送技术。首先,设计了以功率变换为核心的电气化能源岛技术架构;进而提出了考虑风电消纳、供需平衡、灵活外送、航道运输的海上能源岛电力外送方案技术经济评价方法;最后,基于中国南海某岛及周边资源特性,剖析了不同传输距离下所提能源岛电力外送方案的可行性,同时给出了影响该方案技术经济性的主要因素。研究结果表明:船舶外送策略能源传输效率和平准化上岸电能成本对离岸距离和风电容量呈负相关,对单船储能容量呈正相关;电力储能船舶在应对150~200 km风电外送时,当传输能效标准为80%时,平准化上岸电能成本可低至0.46元/kWh,比高压交流(high voltage alternating current,HVAC)、高压直流(high voltage direct current,HVDC)和分频输电(fractional frequency transmission system,FFTS)3种海缆模式均具有更好的经济性。展开更多
Autologous bone marrow-derived mesenchymal stem cells(BMSCs)have been shown to promote osteogenesis;however,the effects of allogeneic BMSCs(allo-BMSCs)on bone regeneration remain unclear.Therefore,we explored the bone...Autologous bone marrow-derived mesenchymal stem cells(BMSCs)have been shown to promote osteogenesis;however,the effects of allogeneic BMSCs(allo-BMSCs)on bone regeneration remain unclear.Therefore,we explored the bone regeneration promotion effect of allo-BMSCs in 3D-printed autologous bone particle(ABP)scaffolds.First,we concurrently printed scaffolds with polycaprolactone,ABPs,and allo-BMSCs for appropriate support,providing bioactive factors and seed cells to promote osteogenesis.In vitro studies showed that ABP scaffolds promoted allo-BMSC osteogenic differentiation.In vivo studies revealed that the implantation of scaffolds loaded with ABPs and allo-BMSCs into canine skull defects for nine months promoted osteogenesis.Further experiments suggested that only a small portion of implanted allo-BMSCs survived and differentiated into vascular endothelial cells,chondrocytes,and osteocytes.The implanted allo-BMSCs released stromal cell-derived factor 1 through paracrine signaling to recruit native BMSCs into the defect,promoting bone regeneration.This study contributes to our understanding of allo-BMSCs,providing information relevant to their future application.展开更多
灵活可拓展的电压控制策略在含有多个分布式电源、且电源和负荷均不断变化的配电网具有重要意义。着眼于智能配电网的发展需求,提出一种基于案例式推理技术的分布式智能电压控制策略。通过自动感知网络电压波动,在保证系统安全和清洁能...灵活可拓展的电压控制策略在含有多个分布式电源、且电源和负荷均不断变化的配电网具有重要意义。着眼于智能配电网的发展需求,提出一种基于案例式推理技术的分布式智能电压控制策略。通过自动感知网络电压波动,在保证系统安全和清洁能源输出比例的情况下,即时提供电压控制策略并建立完备的具有自学习能力的案例库。以包含多个分布式电源的10 k V配电网为实例,对所提出的电压控制策略进行实时数字仿真,结果证明该控制策略能有效解决网络中的电压波动问题。展开更多
文摘能源岛汇集外送被认为是未来海上风电开发的重要模式。目前,海缆长距离输电成本高、陆上接入点受限、故障修复时间长,而电转燃料通过船舶外送的模式又存在转换效率低、海上占地大等问题。为此,提出了基于电力储能船舶的海上能源岛电力外送技术。首先,设计了以功率变换为核心的电气化能源岛技术架构;进而提出了考虑风电消纳、供需平衡、灵活外送、航道运输的海上能源岛电力外送方案技术经济评价方法;最后,基于中国南海某岛及周边资源特性,剖析了不同传输距离下所提能源岛电力外送方案的可行性,同时给出了影响该方案技术经济性的主要因素。研究结果表明:船舶外送策略能源传输效率和平准化上岸电能成本对离岸距离和风电容量呈负相关,对单船储能容量呈正相关;电力储能船舶在应对150~200 km风电外送时,当传输能效标准为80%时,平准化上岸电能成本可低至0.46元/kWh,比高压交流(high voltage alternating current,HVAC)、高压直流(high voltage direct current,HVDC)和分频输电(fractional frequency transmission system,FFTS)3种海缆模式均具有更好的经济性。
基金supported by the Science and Technology Development Fund of the Fourth Military Medical University(No.2016XB051)the Military Medical Promotion Plan of the Fourth Military Medical University(No.2016TSA-005)+2 种基金the Science and Technology Program of Guangzhou(No.201604040002)the Youth Development Project of Air Force Medical University(No.21QNPY072)the Xijing Hospital Booster Program(No.XJZT24CZ10).
文摘Autologous bone marrow-derived mesenchymal stem cells(BMSCs)have been shown to promote osteogenesis;however,the effects of allogeneic BMSCs(allo-BMSCs)on bone regeneration remain unclear.Therefore,we explored the bone regeneration promotion effect of allo-BMSCs in 3D-printed autologous bone particle(ABP)scaffolds.First,we concurrently printed scaffolds with polycaprolactone,ABPs,and allo-BMSCs for appropriate support,providing bioactive factors and seed cells to promote osteogenesis.In vitro studies showed that ABP scaffolds promoted allo-BMSC osteogenic differentiation.In vivo studies revealed that the implantation of scaffolds loaded with ABPs and allo-BMSCs into canine skull defects for nine months promoted osteogenesis.Further experiments suggested that only a small portion of implanted allo-BMSCs survived and differentiated into vascular endothelial cells,chondrocytes,and osteocytes.The implanted allo-BMSCs released stromal cell-derived factor 1 through paracrine signaling to recruit native BMSCs into the defect,promoting bone regeneration.This study contributes to our understanding of allo-BMSCs,providing information relevant to their future application.
文摘灵活可拓展的电压控制策略在含有多个分布式电源、且电源和负荷均不断变化的配电网具有重要意义。着眼于智能配电网的发展需求,提出一种基于案例式推理技术的分布式智能电压控制策略。通过自动感知网络电压波动,在保证系统安全和清洁能源输出比例的情况下,即时提供电压控制策略并建立完备的具有自学习能力的案例库。以包含多个分布式电源的10 k V配电网为实例,对所提出的电压控制策略进行实时数字仿真,结果证明该控制策略能有效解决网络中的电压波动问题。
文摘通过综述青少年特发性脊柱侧凸(adolescent idiopathic scoliosis,AIS)患者康复治疗方法分析矫形器治疗、普通运动疗法、特殊运动疗法以及其他疗法对该病的治疗作用,指出目前利用支具进行矫正治疗是被公认有效且实用的保守康复治疗方法之一,但是应结合AIS患者自身情况,从宣教、心理支持、干预及所处环境出发,遵循康复治疗协会(SOSORT)指南和国际脊柱侧凸研究会(Scoliosis Research Society,SRS)理念,把骨科医生、矫形医生、护理团队、家长、老师及康复治疗师等作为一个团体,以患者为导向结合多种治疗方法制定最适合患者自身的个体化运动治疗方案,从而使每位AIS患者能够得到更好的康复治疗。
