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Strategy for Enhancing the Available Capacity of Distribution Networks Considering Electric Vehicle Charging Modes

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Dianwang Jishu/Power System Technology 2025年第1期49卷 177-186页

作者： chen, Peng Liu, Youbo Yuan, Chuan Tang, Donglai Xiang, yue Liu, Junyong College of Electrical Engineering Sichuan University Sichuan Province Chengdu 610065 China State Grid Sichuan Electric Power Company Sichuan Province Chengdu 610041 China Aostar Information Technology Co. Ltd. Sichuan Province Chengdu 610067 China

The available capacity of distribution networks represents the maximum load capacity that can be accommodated under the existing conditions of the distribution network. It is an essential indicator for evaluating distribution networks' planning and operational effectiveness. This paper proposes a grid transformation method for distribution networks considering electric vehicle charging modes to address the significant decrease in available capacity caused by the large-scale disorderly charging of electric vehicles. By optimizing the grid topology and the optimal number, location, and type of line expansion and energy storage investment within the limited investment., the optimal enhancement of available capacity is achieved. Firstly, the Monte Carlo method is employed to generate scenarios of disorderly charging of electric vehicles, and an orderly electric vehicle charging model based on optimizing charging schedules is constructed. Secondly, a transformation model for enhancing the available capacity of distribution networks is developed based on the coordination of network reconfiguration, line expansion, and energy storage investment. Then, the complexity of the model is reduced using the Benders decomposition algorithm, and a commercial solver is employed for the solution. Finally, a case study based on a city's actual distribution network grid is conducted to validate the effectiveness of the proposed strategies for enhancing the available capacity. © 2025 Power System Technology Press. All rights reserved.

关键词： Monte Carlo methods

Surface-confined persistent luminescence with amplified FRET efficiency for cell-cell communication monitoring

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Science China Chemistry 2025年

作者： Ziyun Miao Wenjing Dai Yubin Jin Bing Qi Jiayi chen Lingling Qiu Yurong wei Jie Wang The Key Lab of Health Chemistry&Molecular Diagnosis of Suzhou College of ChemistryChemical Engineering&Materials ScienceSoochow University

Microbial communication monitoring is vital for understanding the mechanisms beneath gut microbiota equilibrium, infections,and biomanufacturing. Herein, we reported monitoring bacterial communication by surface-confined persistent ***, we constructed core-shell structured Zn1.4Ga1.2Ge0.4O4@Zn1.4Ga1.2Ge0.4O4:Cr（ZGGO@ZGGO:Cr） persistent luminescence nanoparticles（PLNPs） with amplified FRET efficiency for the detection of azoreductase（AzoR） that participates in bacterial communication. ZGGO@ZGGO:Cr nanoparticles were functionalized with an azo black hole quencher（ZGGO@ZGGO:Cr-BHQ-3）. Due to the proximity of surface-confined persistent luminescence with the surface-bound BHQ-3,ZGGO@ZGGO:Cr-BHQ-3 exhibited a FRET efficiency up to 1.6 times that of traditional ZGGO:Cr-BHQ-3. Further, the specific catalytic reduction of azo bonds in BHQ-3 by bacterial extracellular AzoR recovers the persistent luminescence of ZGGO@ZGGO:Cr. ZGGO@ZGGO:Cr-BHQ-3 displayed superior sensitivity and speed in detecting extracellular AzoR over ZGGO:Cr-BHQ-3, attributed to its surface-confined persistent luminescence. We found that the peak secretion of AzoR occurs during the exponential growth period of bacteria including S. aureus and E. coli based on the persistent luminescence recovery rate of ZGGO@ZGGO:Cr-BHQ-3. Furthermore, ZGGO@ZGGO:Cr-BHQ-3 was used to probe the communication between different bacterial species. R. palustris is a kind of lycopene-production bacteria. We found that the cohabitation of R. palustris and S. putrefaciens boosted both AzoR secretion and lycopene production. Moreover, the secretion and activity of AzoR positively correlated with lycopene production, suggesting that AzoR may participate in the communication between R. palustris and S. putrefaciens to promote lycopene production. This study offers a robust method to enhance PLNP-based biosensing sensitivity and provides a promising strategy for microbial communication monitoring.

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Asymmetric interfacial engineering regulated charge distribution on Ru/Ni-N-C sites for efficient hydrogen evolution reaction in alkaline and seawater electrolytes

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Science China Chemistry 2025年

作者： Rui Yu Xi Cao chengyang Zhu Qingqing chen Ziyi Yan Binbin Jiang Junjie Mao Xianwen wei Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes College of Chemistry and Materials ScienceAnhui Normal University Anhui Provincial Key Laboratory of Advanced Catalysis and Energy Materials School of Chemistry and Chemical Engineering Anqing Normal University School of Chemistry and Chemical Engineering Anhui University of Technology

Developing highly efficient and cost-effective electrocatalysts for hydrogen evolution reaction（HER） is grandly challenging in alkaline and alkaline seawater electrolytes. Herein, the asymmetric interfacial active sites with Ru nanoparticles and Ni single atoms in Ru/Ni-N-C were designed through a solvothermal-pyrolysis process. Constructing highly asymmetric interfacial active sites with a strong electron delocalization effect significantly improves HER kinetics. As expected, Ru/Ni-N-C requires low overpotentials with around 20 mV at 10 mA cm-2and robust durability over 48 h in alkaline and alkaline seawater *** at 200 mA cm-2, the overpotentials are close to 100 mV in both above electrolytes for Ru/Ni-N-C. Density function theory calculation results suggest that the asymmetric interface between Ru nanoparticle and Ni-N-C could accelerate the dissociation of water molecules and modulate the hydrogen species, consequently improving the HER performances. This work opens a unique approach for constructing advanced materials for energy conversion.

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蜂产品中重金属对环境污染指示作用的研究

中国农业科技导报 2018年第4期20卷 92-100页

作者：黄嘉琪魏月陈芳吴黎明河北农业大学理工学院河北沧州061100 中国农业科学院蜜蜂研究所北京100093

利用电感耦合等离子质谱(ICP-MS)技术测定了采自我国3个污染程度不同地区的环境介质和蜂产品中的11种常见重金属的含量,并对其进行了描述性分析、相关性分析、方差分析以及回归分析。结果显示,采自不同地区的土壤样品中重金属含量相对... 详细信息

利用电感耦合等离子质谱(ICP-MS)技术测定了采自我国3个污染程度不同地区的环境介质和蜂产品中的11种常见重金属的含量,并对其进行了描述性分析、相关性分析、方差分析以及回归分析。结果显示,采自不同地区的土壤样品中重金属含量相对较高且存在较大差异;洋槐植物中重金属含量总体上较土壤中的低,且采样地区之间差异不显著;蜂花粉中重金属的平均含量与环境污染程度的变化趋势相同,且与环境介质之间相对应的重金属含量存在较强的相关性,因此,蜂花粉较为适合做环境中重金属污染指示剂;尽管蜂蜜中重金属的含量较低,但其中Co、Fe、Mo元素对环境污染具有良好的指示作用。上述结果为评价环境污染程度提供了一种新的技术模式,也为拓展蜂产业应用领域提供了新思路。

关键词：蜂产品重金属电感耦合等离子质谱环境污染指示作用

几种酸性分子筛催化剂对合成异戊二烯反应的催化性能研究

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吉林化工学院学报 2017年第7期34卷 21-24页

作者：张跃伟陈峰于雪吉林化工学院化学与制药工程学院吉林吉林132022 中国石油吉林石化公司有机合成厂吉林吉林132022 吉林化工学院科学技术管理处吉林吉林132022

采用连续固定床反应器,考察了H-Y、H-beta、TS-1三种具有不同酸强度的分子筛催化剂上异丁烯和甲醛气相一步法缩合制备异戊二烯应的催化性能.结果表明,TS-1催化剂的催化性能最为优异,分子筛催化剂的酸强度是合成异戊二烯的关键因素.

关键词：异丁烯甲醛异戊二烯分子筛催化剂

Two paths, one goal: mechanism of calcium homeostasis to balance plant growth and immunity

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Science China Life Sciences 2025年第1期68卷 306-308页

作者： Aziz Ul Ikram Yanping Jing Huan chen Jian chen International Genome Center Jiangsu University Joint Center for Single Cell Biology School of Agriculture and BiologyShanghai Jiao Tong University

Calcium(Ca2+) is an essential nutrient and a cellular signal in plants. The level of free Ca2+in the apoplast is ～10,000-fold higher than that in the cytoplasm at the resting state. This large Ca2+level gradient across the membrane between the interior and exterior can cause Ca2+overload and toxicity. Plants have evolved mechanisms to export Ca2+out of the cytoplasm or store it in intracellular organelles, such as endoplasmic reticulum（ER）, mitochondria, and vacuole.

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人不是物:社会认知的稽古维新

心理学报 2025年第1期57卷 173-189页

作者：董达陈巍绍兴文理学院心理学系大脑、心智与教育研究中心浙江绍兴312000 中国人民大学哲学与认知科学交叉平台北京100080

当代社会认知的理论版图可分为经典概念工具箱与正在与之对抗的新概念工具两部分。经考证,理论论和模拟论等经典概念工具集中诞生于1980年代的美国认知科学界,可以被视为1956认知革命蔓延至社会心理学领域的产物,而新概念工具可以被视... 详细信息

当代社会认知的理论版图可分为经典概念工具箱与正在与之对抗的新概念工具两部分。经考证,理论论和模拟论等经典概念工具集中诞生于1980年代的美国认知科学界,可以被视为1956认知革命蔓延至社会心理学领域的产物,而新概念工具可以被视为与第二代认知革命相适合的替代理论。历史上,社会心理学接受了认知主义的“物”的抽象认知原理,也全盘接受了它带来的理论负荷,即对“人”的感知被还原为对“物”的感知,并且隶属于后者。然而,基于“物”的抽象认知原理始终无法与社会认知的以“人”为本的实践经验相结合,也未能实现该领域的自治。事实上,这一理论困难并非一直存在于“社会认知”的历史路径中,至少在以Heider为标志性人物的1950年代早期社会认知中便不是这样。Heider“人不是物”理论体系在个体层面上包括知觉实在论、事件归因和生命性−非生命性范畴区分三个部分,但是第三个理论部件彼时囿于作者主题侧重、证据不足、技术匮乏等多种原因未能完成。结合当代来自演化和比较的、行为和发展的以及神经通路假设的新证据,通过重新发掘并最终完整构建了“人不是物”论题,尝试为当代社会认知理论困难提供一个建设性意见。

关键词：社会认知人的感知认知革命生命性主体间性

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用于能量回收的有机朗肯循环混合工质研究

化学工程 2017年第4期45卷 39-44页

作者：仇阳吕振波潘振李萍乔伟彪宗月陈树军辽宁石油化工大学石油天然气工程学院辽宁抚顺113001 辽宁石油化工大学化学化工与环境学部辽宁抚顺113001 中国石油大学(华东)储运与建筑工程学院山东青岛266580

近年来随着低温余热的利用越来越受到重视,将LNG冷能和低温余热联合应用的有机朗肯循环研究也受到了广泛的关注,其中循环工质的选择更是提高系统热力性能的关键。针对循环工质选择的问题,将R236ea、R245fa以及两者按不同质量分数配比得... 详细信息

近年来随着低温余热的利用越来越受到重视,将LNG冷能和低温余热联合应用的有机朗肯循环研究也受到了广泛的关注,其中循环工质的选择更是提高系统热力性能的关键。针对循环工质选择的问题,将R236ea、R245fa以及两者按不同质量分数配比得到的9种混合工质作为亚临界ORC工质,结合窄点分析方法计算了系统在2种最佳设计工况下的热力学性能及热经济性。结果表明:混合工质R236ea/R245fa(0.9/0.1)和R236ea/R245fa(0.8/0.2)分别是以最佳热和冷回收效率为设计工况标准时的最佳循环工质;2种工况下,混合工质的热经济性均优于纯工质;在混合工质中提高R236ea的比例可以有效降低换热面积,提高系统经济性。为日后将低温余热和LNG冷能联合应用的有机朗肯循环二元混合工质选择提供一定的参考。

关键词：低温余热 LNG 有机朗肯循环混合工质热力学热经济

Facile synthesis of the dodecahydridododecaborate (B12H122-) from borane Lewis base adducts

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Science China Chemistry 2025年

作者： Yi Jing Xin-Ran Liu Xing-Hua Wang Hui Han Sha-Sha Liang Xi-Meng chen Dong-Hui wei Lai-Sheng Wang Xue-Nian chen College of Chemistry Zhengzhou University School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced MaterialsHenan Normal University Department of Chemistry Brown University

Polyhedral boranes are a class of well-known boron molecular clusters widely used in energy,chemistry,medicine,and materials science because of their unique physical and chemical *** efforts have been made in the past decades to find more effective synthetic methods for this important class of boron ***,existing synthetic methods suffer from low efficiency and low ***,we report a facile one-pot synthesis of[（CH3）3S]2B12H12with moderate yields at mild *** mechanisms for the multi-step chemoselective synthesis of B12H122-without other by-products are elucidated based on theoretical results and our previous *** Lewis base used in B–H bond condensation reaction,which acts as a hydrogen or to balance the newly generated polyhedral borane charges,is proposed and studied in *** current study has led to a more effective and selective synthetic method for B12H122-and has also implicated the syntheses of other new polyhedral boranes.

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