考虑主动配电网下多区域综合能源系统间电能交互的优化调度策略

碳达峰碳中和的背景下、主动配电网(active distribution network, ADN)下多主体间能源共享有助于消纳弃风弃光。但随着各微网内风机光伏容量日益增加,每日微网净负荷峰谷趋势变化明显。传统分时电价逐渐很难发挥对微网的削峰填谷作用。提出考虑主动配电网下多主体能源共享调度策略,以主动配电网向下级微网的售电收益减去向主网购电成本所得净收益最大为目标函数,充分考虑下级多微网在电网议价下以微网自身运行成本最低为目标的调度自主性,运用卡罗需-库恩-塔克(Karush-Kuhn-Tucker, KKT)条件将下级多主体电能共享联盟运行成本最低的目标转化为上级目标的约束条件。引入KKT乘子,同时运用大M法对非线性约束进行线性化处理,提高模型求解速度。在MATLAB的Gurobi环境下,对连续的上下层耦合变量乘积进行离散化处理。最后,在IEEE33节点的主动配电网算例中验证所提模型的有效性。     

主动流媒体编码转换机制研究

扩展了主动流媒体编码转换机制,该机制能进一步充分利用主动网络技术赋予网络的可编程、可计算的能力,除了只为同一组播内容建立一棵组播树外,组播源只发送一个最高质量的流媒体编码版本,在主动节点进行灵活的数据编码转换以满足组播用户的不同需求.该机制适用于任何种类流媒体的组播传输,不同的只是流媒体编码转换的复杂性和具体的编码转换过程.对该机制进行了大量的仿真实验,在协议设计和性能方面都予以了分析.     

Dual elemental modulation in cationic and anionic sites of the multi-metal Prussian blue analogue pre-catalysts for promoted oxygen evolution reaction

Designing advanced electrocatalysts for the oxygen evolution reaction (OER) is of great significance owing to its crucial role in facilitating the production of clean hydrogen energy via water splitting. To date, it has been widely accepted that a pre-oxidation process with the in-situ generation of the catalytically active high-valence metal sites is essential for promoting the OER behavior of most transition-metal-based OER catalysts, or more felicitously speaking, pre-catalysts. Hence, exploring such pre-catalysts with high pre-oxidation reactivity is of high promise. Herein, we proposed the dual elemental modulation in the cationic and anionic sites of the multi-metal Prussian blue analogue (PBA) pre-catalysts, resulting in promoted OER behavior benefitted from the efficient pre-oxidation ability as well as the multi-metal synergy. Detailed investigations indicate that the Co-containing multi-metallic cations and mixed Fe^IIICo^III cyanide anions in NiCuCo^II–Fe^IIICo^III PBA (denoted as NiCuCo^II–Fe^IIICo^III) are beneficial to OER catalysis owing to the high intrinsic activity guaranteed by the local Co³⁺ active sites as well as the optimal multi-metal synergy. After the facile pre-oxidation process, additional high-valence Ni, Cu and Fe ions can be in-situ formed and serve as the active sites, thereby resulting in significantly improved OER behavior. For example, the OER current density of NiCuCo^II–Fe^IIICo^III exhibits 1.81 times enhancement even after 72 ?h continuous OER catalysis, and the required overpotential for 10 ?mA ?cm^?2 reduces from 288 ?mV for the fresh pre-catalyst to a remarkable record of 251 ?mV after the pre-oxidation-induced activation, making the optimal PBA-based catalyst a promising candidate for efficient and durable water electrolysis.     

浅析活性低聚糖食品的开发

活性低聚糖不能被人体消化道内酶系酶解,而直接进入大肠内为双歧杆菌所利用,是肠道有益茵群的有效增殖因子。活性低聚糖因其独特的生理功能,在国外已成为一类重要的保健食品基料。本文就活性低聚糖食品的营养保健作用和开发利用进行了初步阐述。     

建筑结构电液伺服主动抗振系统最优控制

分析了线性二次型最优控制是适用于电液伺服主动抗振系统的原因，并根据电液伺服抗振系统特点，提出了以伺服阀ｐ－Ｑ特性为不等式约束条件的瞬时最优控制方法，抗振模拟试验结果证实了这一控制思想的正确性和有效性。