为了平抑风电、光伏的出力波动,减少其带给微网的不利影响,以风光储系统中的混合储能系统(Hybrid Energy Storage System,HESS)为研究对象,提出一种基于变分模态分解(Variational Mode Decomposition,VMD)和神经网络的HESS容量优化配置...为了平抑风电、光伏的出力波动,减少其带给微网的不利影响,以风光储系统中的混合储能系统(Hybrid Energy Storage System,HESS)为研究对象,提出一种基于变分模态分解(Variational Mode Decomposition,VMD)和神经网络的HESS容量优化配置方法。采用VMD分解并结合储能系统荷电状态(State of Charge,SOC)等约束,制定HESS中两类储能的充放电策略。通过构造神经网络模型拟合储能系统关键参数与风光储系统输出功率平滑度指标的对应关系。以平滑效果最优与投资成本最低为目标函数,构建HESS容量优化配置模型,采用遗传算法求解HESS的最优容量配置方案。最后结合实际算例分析验证了所提方法的有效性。展开更多
磷是植物体的重要组成元素,也是植物生长发育所必需的大量元素之一,当前土壤的低磷胁迫严重制约着中国油菜和其他作物的生产。脂质转移蛋白LTPs (Lipid transfer proteins)是植物体中一类重要小分子量碱性蛋白,在油菜的抗低磷胁迫中有...磷是植物体的重要组成元素,也是植物生长发育所必需的大量元素之一,当前土壤的低磷胁迫严重制约着中国油菜和其他作物的生产。脂质转移蛋白LTPs (Lipid transfer proteins)是植物体中一类重要小分子量碱性蛋白,在油菜的抗低磷胁迫中有着潜在的应用价值。本研究从甘蓝型油菜中克隆了脂质转移蛋白基因BnLTP_C01,生物信息学分析显示该基因全长411 bp,能够编码含有136个氨基酸的蛋白质。该蛋白质第7~24个氨基酸的位置为跨膜区域,第53~135个氨基酸的位置为脂质转移蛋白结构域AAI。过表达载体2X35S::BnLTP_C01已构建完成,并成功遗传转化到甘蓝型油菜中,获得了12个转基因阳性株系,为深入研究BnLTP_C01在油菜抗低磷胁迫中的作用提供实验材料,也为油菜抗低磷胁迫的分子育种提供一定理论基础。展开更多
Induction brazecoating technology is an important means to improve the surface properties of materials.In this paper,copper plate and corundum are selected as substrates for induction brazecoating respectively.The tem...Induction brazecoating technology is an important means to improve the surface properties of materials.In this paper,copper plate and corundum are selected as substrates for induction brazecoating respectively.The temperature variation of powder and paste coating is systematically studied,and the heat conduction mode and path in the brazecoating process are analyzed.The results show that rise of the coating temperature mainly depends on the heat absorption from the substrate.The liquid-solid interface conducts heat violently and advances step by step,which promotes the melting spread of metal filler metal.The powdery brazecoating material is in a free state,and there is a gas insulation film between the powder particles and the diamond,making it difficult for substrate to conduct heat to the coating.The binder not only assists forming,shell making and oxygen isolation,but also plays an important role during melting.展开更多
文摘为了平抑风电、光伏的出力波动,减少其带给微网的不利影响,以风光储系统中的混合储能系统(Hybrid Energy Storage System,HESS)为研究对象,提出一种基于变分模态分解(Variational Mode Decomposition,VMD)和神经网络的HESS容量优化配置方法。采用VMD分解并结合储能系统荷电状态(State of Charge,SOC)等约束,制定HESS中两类储能的充放电策略。通过构造神经网络模型拟合储能系统关键参数与风光储系统输出功率平滑度指标的对应关系。以平滑效果最优与投资成本最低为目标函数,构建HESS容量优化配置模型,采用遗传算法求解HESS的最优容量配置方案。最后结合实际算例分析验证了所提方法的有效性。
文摘磷是植物体的重要组成元素,也是植物生长发育所必需的大量元素之一,当前土壤的低磷胁迫严重制约着中国油菜和其他作物的生产。脂质转移蛋白LTPs (Lipid transfer proteins)是植物体中一类重要小分子量碱性蛋白,在油菜的抗低磷胁迫中有着潜在的应用价值。本研究从甘蓝型油菜中克隆了脂质转移蛋白基因BnLTP_C01,生物信息学分析显示该基因全长411 bp,能够编码含有136个氨基酸的蛋白质。该蛋白质第7~24个氨基酸的位置为跨膜区域,第53~135个氨基酸的位置为脂质转移蛋白结构域AAI。过表达载体2X35S::BnLTP_C01已构建完成,并成功遗传转化到甘蓝型油菜中,获得了12个转基因阳性株系,为深入研究BnLTP_C01在油菜抗低磷胁迫中的作用提供实验材料,也为油菜抗低磷胁迫的分子育种提供一定理论基础。
基金supported by the 2020 Ningbo “3315 Talent Introduction Plan” Innovative Team (C-Class)the major project of Ningbo “Scientific and Technological Innovation 2025”(Grant No.2020Z111)Science and Technology Major Project of Zhejiang Province (No.203ZP20220161)
文摘Induction brazecoating technology is an important means to improve the surface properties of materials.In this paper,copper plate and corundum are selected as substrates for induction brazecoating respectively.The temperature variation of powder and paste coating is systematically studied,and the heat conduction mode and path in the brazecoating process are analyzed.The results show that rise of the coating temperature mainly depends on the heat absorption from the substrate.The liquid-solid interface conducts heat violently and advances step by step,which promotes the melting spread of metal filler metal.The powdery brazecoating material is in a free state,and there is a gas insulation film between the powder particles and the diamond,making it difficult for substrate to conduct heat to the coating.The binder not only assists forming,shell making and oxygen isolation,but also plays an important role during melting.
