输电网灵活性受到节点灵活性与网络传输灵活性耦合影响且灵活性供需平衡关系随源荷波动动态变化,所以有必要开展输电网多元灵活性资源协调规划研究。该文针对输电网潮流动态变化的特点,构建一种反应灵活性资源传输需求和网络传输能力动...输电网灵活性受到节点灵活性与网络传输灵活性耦合影响且灵活性供需平衡关系随源荷波动动态变化,所以有必要开展输电网多元灵活性资源协调规划研究。该文针对输电网潮流动态变化的特点,构建一种反应灵活性资源传输需求和网络传输能力动态匹配程度的网络传输灵活性指标;然后,建立包含储能装置与统一潮流控制器(unified power flow controller,UPFC)的输电网多元灵活性资源两阶段协调优化规划模型;最后,通过算例分析验证所提的网络传输灵活性指标能够定量地反应网络传输灵活性随源荷波动的动态变化,基于网络传输灵活性最优的两阶段规划模型,有利于更好地挖掘原网络的传输能力,规划方案对更高的源-荷波动水平具有更好的适应性,提出的灵活性重要度指标可为灵活性资源初步选址提供指导。展开更多
In this study,cobalt-incorporated polydopamine coating onto Mn-modified mesoporous silica and successive graphitization treatment make the resulting composite afford abundant porosity,multiple metal active species,pol...In this study,cobalt-incorporated polydopamine coating onto Mn-modified mesoporous silica and successive graphitization treatment make the resulting composite afford abundant porosity,multiple metal active species,polar N sites,and excellent light-to-heat conversion ability.The controlled graphitization temperature was optimized to improve the activity state of metal species.The results reveal that Co_(3)O_(4) nanoparticles incorporated thin-layer carbon formed onto the Mn-confined mesoporous silica,and more Co(Ⅱ)and Mn(Ⅲ)were generated in the MS-Co-500N_(2) compared to MS-Co-500Air,which could cause the accelerated reaction cycles in the potassium peroxymonosulfate complex salt(PMS)activation.The degradation experiments demonstrated that the catalyst almost completely degraded biphenol A within 10 min with the reaction rate constant of 0.56 min−1,nearly 205 times enhancement compared to the MS-Co-500Air.The free radicals trapping and quenching control demonstrated the dominant role of ^(1)O_(2) and·O_(2) in the degradation process.Due to the efficient incorporation of Co_(3)O_(4) nanoparticles and thin-layer carbon,the photothermal conversion properties were explored and utilized for solar-driving interface water evaporation and cleanwater recovery.To explore the practical application possibility in treating complicated polluted wastewater,the MS-Co-500N_(2) materials were fixed on the melamine sponge by Ca ions-trigger alginate crosslinking strategy,and the integrated monolith evaporator shows an excellent water evaporation performance(1.52 kg·m^(−2)·h^(−1))and synchronous pollutant removal in biphenol A(94%,10 min),carbamazepine(92%,10 min),oxytetracycline(84%,20 min)and norfloxacin(84%,20 min).展开更多
Excessive fossil fuel use has increased carbon dioxide(CO_(2)) emissions,driving climate change and ocean acidification.This review evaluates the potential of higher alcohols as fuels for carbon circularity,comparing ...Excessive fossil fuel use has increased carbon dioxide(CO_(2)) emissions,driving climate change and ocean acidification.This review evaluates the potential of higher alcohols as fuels for carbon circularity,comparing their properties,energy efficiency,and technology readiness with hydrogen,methane,and methanol.Higher alcohols,produced via CO_(2) hydrogenation,exhibit advantages such as liquid-phase storage,higher energy density,and safer handling.Additionally,their clean combustion produces fewer pollutants like CO and NO_(x).However,CO_(2) hydrogenation to higher alcohols faces challenges,including high energy demands,kinetic barriers,and immature production technologies,resulting in lower energy efficiency compared to H_(2),methane,and methanol.Higher alcohols,with their superior energy density and safety,hold promise as sustainable fuels,particularly when integrated with CO_(2) capture technologies.However,improvements in catalyst performance,process integration,and production scalability are critical for their widespread adoption.展开更多
台风极端天气会诱发强风、暴雨、风暴潮等灾害链,传统海上风电运维策略仅考虑台风风速,难以全面地刻画台风对风机可靠度的影响,为此该文提出一种考虑台风灾害链的海上风电预测性维护策略。首先,针对台风及其灾害链对海上风机各部件冲击...台风极端天气会诱发强风、暴雨、风暴潮等灾害链,传统海上风电运维策略仅考虑台风风速,难以全面地刻画台风对风机可靠度的影响,为此该文提出一种考虑台风灾害链的海上风电预测性维护策略。首先,针对台风及其灾害链对海上风机各部件冲击机理与载荷特性不同导致可靠度建模困难的问题,构建一种基于3-D Vine Copula的多灾害联合模型,对部件故障率增量进行差异化建模;其次,为解决台风等复杂海况下数据采集与监视控制系统(supervisory control and data acquisition,SCADA)关联数据隐含时空关系复杂难以准确描述态势的问题,将信息熵和循环神经网络引入时序卷积网络中,提出一种机组态势感知模型并修正台风灾害链下基于态势感知的可靠度;最后,针对态势变化和台风灾害链耦合影响下风机可靠度下降引发的不同时间尺度维护策略协调问题,构建海上风电机组多时间粒度分层预测性维护策略。通过算例仿真验证所提模型和方法的有效性。展开更多
文摘输电网灵活性受到节点灵活性与网络传输灵活性耦合影响且灵活性供需平衡关系随源荷波动动态变化,所以有必要开展输电网多元灵活性资源协调规划研究。该文针对输电网潮流动态变化的特点,构建一种反应灵活性资源传输需求和网络传输能力动态匹配程度的网络传输灵活性指标;然后,建立包含储能装置与统一潮流控制器(unified power flow controller,UPFC)的输电网多元灵活性资源两阶段协调优化规划模型;最后,通过算例分析验证所提的网络传输灵活性指标能够定量地反应网络传输灵活性随源荷波动的动态变化,基于网络传输灵活性最优的两阶段规划模型,有利于更好地挖掘原网络的传输能力,规划方案对更高的源-荷波动水平具有更好的适应性,提出的灵活性重要度指标可为灵活性资源初步选址提供指导。
基金supported by the National Natural Science Foundation of China(No.21908085)the China Postdoctoral Science Foundation(No.2023M731422)+3 种基金and the Science and Technology Plan School-Enterprise Cooperation Industry-University-Research Forward-Looking Project of Zhangjiagang(No.ZKYY2341)Suzhou Hospital Association Infection Management Special Research(No.SZSYYXH-2023-ZY1)Suzhou Medical Key Discipline of Occupational Medicine(No.SZXK202115)Jiangsu Undergraduate Innovative Training Program(No.SJCX23_2163).
文摘In this study,cobalt-incorporated polydopamine coating onto Mn-modified mesoporous silica and successive graphitization treatment make the resulting composite afford abundant porosity,multiple metal active species,polar N sites,and excellent light-to-heat conversion ability.The controlled graphitization temperature was optimized to improve the activity state of metal species.The results reveal that Co_(3)O_(4) nanoparticles incorporated thin-layer carbon formed onto the Mn-confined mesoporous silica,and more Co(Ⅱ)and Mn(Ⅲ)were generated in the MS-Co-500N_(2) compared to MS-Co-500Air,which could cause the accelerated reaction cycles in the potassium peroxymonosulfate complex salt(PMS)activation.The degradation experiments demonstrated that the catalyst almost completely degraded biphenol A within 10 min with the reaction rate constant of 0.56 min−1,nearly 205 times enhancement compared to the MS-Co-500Air.The free radicals trapping and quenching control demonstrated the dominant role of ^(1)O_(2) and·O_(2) in the degradation process.Due to the efficient incorporation of Co_(3)O_(4) nanoparticles and thin-layer carbon,the photothermal conversion properties were explored and utilized for solar-driving interface water evaporation and cleanwater recovery.To explore the practical application possibility in treating complicated polluted wastewater,the MS-Co-500N_(2) materials were fixed on the melamine sponge by Ca ions-trigger alginate crosslinking strategy,and the integrated monolith evaporator shows an excellent water evaporation performance(1.52 kg·m^(−2)·h^(−1))and synchronous pollutant removal in biphenol A(94%,10 min),carbamazepine(92%,10 min),oxytetracycline(84%,20 min)and norfloxacin(84%,20 min).
基金the financial support from the National Natural Science Foundation of China (U22B20148,22208143,and 22278204)the International Science and Technology Cooperation Project of the Innovative Supporting Plan from the Jiangsu Provincial Department of Science and Technology (BZ2022040)+1 种基金the State Key Laboratory of Materials-Oriented Chemical Engineering (ZK202101,SKL-MCE-24A09,and the Open Project SKL-MCE-23B)support from the China National Petroleum Corporation。
文摘Excessive fossil fuel use has increased carbon dioxide(CO_(2)) emissions,driving climate change and ocean acidification.This review evaluates the potential of higher alcohols as fuels for carbon circularity,comparing their properties,energy efficiency,and technology readiness with hydrogen,methane,and methanol.Higher alcohols,produced via CO_(2) hydrogenation,exhibit advantages such as liquid-phase storage,higher energy density,and safer handling.Additionally,their clean combustion produces fewer pollutants like CO and NO_(x).However,CO_(2) hydrogenation to higher alcohols faces challenges,including high energy demands,kinetic barriers,and immature production technologies,resulting in lower energy efficiency compared to H_(2),methane,and methanol.Higher alcohols,with their superior energy density and safety,hold promise as sustainable fuels,particularly when integrated with CO_(2) capture technologies.However,improvements in catalyst performance,process integration,and production scalability are critical for their widespread adoption.
文摘台风极端天气会诱发强风、暴雨、风暴潮等灾害链,传统海上风电运维策略仅考虑台风风速,难以全面地刻画台风对风机可靠度的影响,为此该文提出一种考虑台风灾害链的海上风电预测性维护策略。首先,针对台风及其灾害链对海上风机各部件冲击机理与载荷特性不同导致可靠度建模困难的问题,构建一种基于3-D Vine Copula的多灾害联合模型,对部件故障率增量进行差异化建模;其次,为解决台风等复杂海况下数据采集与监视控制系统(supervisory control and data acquisition,SCADA)关联数据隐含时空关系复杂难以准确描述态势的问题,将信息熵和循环神经网络引入时序卷积网络中,提出一种机组态势感知模型并修正台风灾害链下基于态势感知的可靠度;最后,针对态势变化和台风灾害链耦合影响下风机可靠度下降引发的不同时间尺度维护策略协调问题,构建海上风电机组多时间粒度分层预测性维护策略。通过算例仿真验证所提模型和方法的有效性。
