Naturally degradable capsule provides a platform for sustained fragrance release.However,practical challenges such as low encapsulation efficiency and difficulty in sustained release are still limited in using fragran...Naturally degradable capsule provides a platform for sustained fragrance release.However,practical challenges such as low encapsulation efficiency and difficulty in sustained release are still limited in using fragranceloaded capsules.In this work,the natural materials sodium alginate and gelatine are dissolved and act as the aqueous phase,lavender is dissolved in caprylic/capric triglyceride(GTCC)as the oil phase,and SiO_(2) nanoparticles with neutralwettability as a solid emulsifier to form O/W Pickering emulsions simultaneously.Finally,multi-core capsules are prepared using the drop injection method with emulsions as templates.The results show that the capsules have been successfully prepared with a spherical morphology and multi-core structure,and the encapsulation rate of multi-core capsules can reach up to 99.6%.In addition,the multi-core capsules possess desirable sustained release performance,the cumulative sustained release rate of fragrance at 25℃over 49 days is only 32.5%.It is attributed to the significant protection of multi-core structure,Pickering emulsion nanoparticle membranes,and hydrogel network shell for encapsulated fragrance.This study is designed to deliver a new strategy for using sustained-release technology with fragrance in food,cosmetics,textiles,and other fields.展开更多
由于可再生能源的间歇性特点,储能单元广泛应用于孤岛直流微电网中。为保护储能单元,防止过度充放,需要对储能单元的荷电状态(state of charge,SOC)实行均衡控制,然而各储能单元线路阻抗及容量存在的差异将对SOC均衡造成影响。针对这一...由于可再生能源的间歇性特点,储能单元广泛应用于孤岛直流微电网中。为保护储能单元,防止过度充放,需要对储能单元的荷电状态(state of charge,SOC)实行均衡控制,然而各储能单元线路阻抗及容量存在的差异将对SOC均衡造成影响。针对这一问题,提出了一种基于一致性算法及自适应下垂控制的储能单元SOC均衡控制策略。首先,通过定义电流比例系数,建立了各储能单元下垂系数与SOC之间的函数关系式,实现了储能单元自适应SOC均衡,并通过劳斯判据证明了系统的稳定性。其次,将所提控制策略与其他文献控制方法进行对比,并且考虑了4种不同工况对SOC均衡的影响。最后,通过Matlab/Simulink进行了仿真分析,验证了所提控制策略的有效性。展开更多
本工作以光储氢孤岛直流微电网为研究对象,针对含电/氢混合储能系统的微电网能量流动关系复杂、安全稳定运行要求高的特点,在深入分析系统工作模式的基础上,提出了考虑蓄电池荷电状态(state of charge,SOC)和储氢罐荷氢状态(state of hy...本工作以光储氢孤岛直流微电网为研究对象,针对含电/氢混合储能系统的微电网能量流动关系复杂、安全稳定运行要求高的特点,在深入分析系统工作模式的基础上,提出了考虑蓄电池荷电状态(state of charge,SOC)和储氢罐荷氢状态(state of hydrogen,SOH)融合的分层协调控制策略。该协调控制策略能够协调光伏发电单元工作在最大功率跟踪和负载功率跟踪双模式;电解制氢单元能够自动切除和投入运行,且投入运行时能够在最小功率工作点、最大效率工作点和最大功率工作点3种模式之间自适应切换;燃料电池单元自动介入运行补充微电网的功率缺额;负载按照优先级自动投切;蓄电池荷电状态和储氢罐荷氢状态处于合理工作范围,实现了微电网优化可靠运行。不同工况下的仿真结果验证了所提协调控制策略的正确性和有效性。展开更多
为了准确估计动力电池的SOC(state of charge)值,研究一种基于改进长短期记忆(LSTM)的新能源汽车动力电池SOC联合估计方法。分析不同因素对新能源汽车动力电池SOC的影响。基于此,构建基于卷积神经网络(CNN)-LSTM估计模型,以实现电池SOC...为了准确估计动力电池的SOC(state of charge)值,研究一种基于改进长短期记忆(LSTM)的新能源汽车动力电池SOC联合估计方法。分析不同因素对新能源汽车动力电池SOC的影响。基于此,构建基于卷积神经网络(CNN)-LSTM估计模型,以实现电池SOC联合估计。结果表明,改进后的LSTM训练均方误差更小,说明改进后LSTM拟合程度更好,具有实用性。展开更多
文摘Naturally degradable capsule provides a platform for sustained fragrance release.However,practical challenges such as low encapsulation efficiency and difficulty in sustained release are still limited in using fragranceloaded capsules.In this work,the natural materials sodium alginate and gelatine are dissolved and act as the aqueous phase,lavender is dissolved in caprylic/capric triglyceride(GTCC)as the oil phase,and SiO_(2) nanoparticles with neutralwettability as a solid emulsifier to form O/W Pickering emulsions simultaneously.Finally,multi-core capsules are prepared using the drop injection method with emulsions as templates.The results show that the capsules have been successfully prepared with a spherical morphology and multi-core structure,and the encapsulation rate of multi-core capsules can reach up to 99.6%.In addition,the multi-core capsules possess desirable sustained release performance,the cumulative sustained release rate of fragrance at 25℃over 49 days is only 32.5%.It is attributed to the significant protection of multi-core structure,Pickering emulsion nanoparticle membranes,and hydrogel network shell for encapsulated fragrance.This study is designed to deliver a new strategy for using sustained-release technology with fragrance in food,cosmetics,textiles,and other fields.
文摘由于可再生能源的间歇性特点,储能单元广泛应用于孤岛直流微电网中。为保护储能单元,防止过度充放,需要对储能单元的荷电状态(state of charge,SOC)实行均衡控制,然而各储能单元线路阻抗及容量存在的差异将对SOC均衡造成影响。针对这一问题,提出了一种基于一致性算法及自适应下垂控制的储能单元SOC均衡控制策略。首先,通过定义电流比例系数,建立了各储能单元下垂系数与SOC之间的函数关系式,实现了储能单元自适应SOC均衡,并通过劳斯判据证明了系统的稳定性。其次,将所提控制策略与其他文献控制方法进行对比,并且考虑了4种不同工况对SOC均衡的影响。最后,通过Matlab/Simulink进行了仿真分析,验证了所提控制策略的有效性。
文摘本工作以光储氢孤岛直流微电网为研究对象,针对含电/氢混合储能系统的微电网能量流动关系复杂、安全稳定运行要求高的特点,在深入分析系统工作模式的基础上,提出了考虑蓄电池荷电状态(state of charge,SOC)和储氢罐荷氢状态(state of hydrogen,SOH)融合的分层协调控制策略。该协调控制策略能够协调光伏发电单元工作在最大功率跟踪和负载功率跟踪双模式;电解制氢单元能够自动切除和投入运行,且投入运行时能够在最小功率工作点、最大效率工作点和最大功率工作点3种模式之间自适应切换;燃料电池单元自动介入运行补充微电网的功率缺额;负载按照优先级自动投切;蓄电池荷电状态和储氢罐荷氢状态处于合理工作范围,实现了微电网优化可靠运行。不同工况下的仿真结果验证了所提协调控制策略的正确性和有效性。
文摘为了准确估计动力电池的SOC(state of charge)值,研究一种基于改进长短期记忆(LSTM)的新能源汽车动力电池SOC联合估计方法。分析不同因素对新能源汽车动力电池SOC的影响。基于此,构建基于卷积神经网络(CNN)-LSTM估计模型,以实现电池SOC联合估计。结果表明,改进后的LSTM训练均方误差更小,说明改进后LSTM拟合程度更好,具有实用性。
