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Impact of the PV Location in Distribution Networks on Network Power Losses and Voltage Fluctuations with PSO Analysis

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CSEE Journal of Power and Energy Systems 2022年第2期8卷 523-534页

作者： Puyu Wang Fangyu Liang jinyuan song Ningqiang Jiang Xiao-Ping Zhang Ling Guo Xinxin Gu School of Automation Nanjing University of Science&Technology(NUST)Nanjing 210094JiangsuChina School of Engineering University of BirminghamEdgbastonBirmingham B152TTUnited Kingdom Nanjing GWDR Relays Technologies Co. Nanjing 210032JiangsuChina

Increased grid integration of photovoltaic(PV)has aggravated the uncertainty of distribution network *** a distribution network with PV,the impact of the PV location on the network power losses and voltage fluctuations is investigated with analytical derivations reflected by the line *** approaches of the PV location with consideration of two aspects,i.e.,minimum network power losses and minimum voltage fluctuations,are analyzed.A particle swarm optimization(PSO)algorithm is used to synthesize an optimal compromised solution so as to determine the PV location.A 10 kV distribution network with one PV is established on the time-domain simulation environment PSCAD/*** simulation results justify the theoretical analysis and indicate that when the active power of the PV is more/less than twice that of the overall loads/end loads,the network power losses and node voltage fluctuations are both minimum when the PV is integrated into the head/tail end of the *** the active power of the PV is between the above two conditions,nodes t/f can be identified for the integration of the PV between the head/end nodes of the network to achieve the minimum network power losses/voltage fluctuations,*** effectiveness of the proposed optimization approach is verified and can provide a reference for selecting the PV location in the distribution network.

关键词： Distribution network network power losses particle swarm optimization(PSO) PV location voltage fluctuations

A Visualized Fusion Protein Based on Self-assembly Hydrophobin HGFI

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Chemical Research in Chinese Universities 2015年第5期31卷 781-786页

作者： ZHAO Liqiang LIU jinyuan song Dongmin WANG Xiangxiang TAI Feifei XU Haijin QIAO Mingqiang Key Laboratory of Bioaetive Materials Ministry of Education College of Life Sciences Nankai University Tianjin 300071 P. R. China

Hydrophobins are a type be used to modify material surfaces of small amphipathic proteins with a and adsorb enzymes, antibodies and unique self-assembly property, which can even cells. In this study, a fusion protein consisting of hydrophobin HGFI and green fluorescent protein（GFP） was successfully obtained from Pichia patoris （P. pastoris）. Water contact angle（WCA） measurement proves that the wettability of the surfaces of different materials was changed. We further demonstrated the self-assembly ability of HGFI-GFP, which can be used to disperse the multi-walled carbon nanotubes（MWCNTs）. Finally, the adsorption of HGFI-GFP onto the surface of the tissue engineering material poly（ε-caprolactone）（PCL） was evaluated by detecting the fluorescence of the fusion protein itself. The resalt demonstrates that both the basic self-assembly activity of the HGFI domain and the functional activity of the GFP domain were still remained.

关键词： Self-assembly Hydrophobin Fusion protein Dispersion Modification

Equivalent model of multi-type distributed generators under faults with fast-iterative calculation method based on improved PSO algorithm

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Protection and Control of Modern Power Systems 2021年第1期6卷 371-382页

作者： Puyu Wang jinyuan song Fangyu Liang Fang Shi Xiangping Kong Guangen Xie Xiao-Ping Zhang Xinxin Gu School of Automation Nanjing University of Science&Technology(NUST)Nanjing210094JiangsuChina Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinan250061China Jiangsu Electric Power Research Institute Jiangsu Electric Power CompanyNanjing211103JiangsuChina School of Engineering University of BirminghamEdgbastonB152TTBirminghamUK Nanjing GWDR Relays Technologies Co. Nanjing210032JiangsuChina

There are various types of distributed generators (DGs) with different grid integration strategies. The transient characteristics of the fault currents provided by the DGs are different to those of conventional synchronous generators. In this paper, a distribution network with multi-type DGs is investigated, including consideration of DG low-voltage ride through (LVRT). The fault current characteristics of two typical DGs, i.e. an inverter-interfaced distributed generator (IIDG) and a doubly-fed induction generator (DFIG), are analyzed, considering the specific operation modes. Based on analysis of the fault characteristics, an equivalent model of the multi-type DGs under symmetrical/asymmetrical fault conditions is established. A fast-iterative fault calculation method for enhancing the calculation efficiency while avoiding local convergence is then proposed using an improved particle swarm optimization (PSO) algorithm. A simulation system of the distribution network with multi-type DGs is established in PSCAD/EMTDC. The simulation results validate the high accuracy and calculation efficiency of the proposed calculation method of the fault components. This can assist in the settings of the protection threshold.

关键词： Multi-type distributed generators(DGs) Fault current characteristics Equivalent model Fast-iterative calculation method Improved particle swarm optimization(PSO)

硅钢片固结方式对新能源汽车电机模态特性影响的研究

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振动与冲击 2023年第1期42卷 267-272页

作者：宋金元蒋伟康上海交通大学机械与动力工程学院上海200240

新能源汽车优点突出,成为各国近来新车发展的主流。电机转速的提高使得工作频率不断升高,容易与定子发生高频共振。定子铁芯的加工工艺会影响定子的模态频率,直接对定子进行数值分析会耗费大量计算资源与时间成本。因此,针对粘接定子的... 详细信息

新能源汽车优点突出,成为各国近来新车发展的主流。电机转速的提高使得工作频率不断升高,容易与定子发生高频共振。定子铁芯的加工工艺会影响定子的模态频率,直接对定子进行数值分析会耗费大量计算资源与时间成本。因此,针对粘接定子的动力学建模运用叠片理论、针对焊接定子的简化建模基于半有限元方法,然后利用定子的模态实验验证了所建模型的准确性,最后针对焊接定子提出了减振降噪的结构优化设计。结果表明,固结方式直接影响定子的刚度而对其动力学特性产生巨大影响;提出的两种建模方法结果精确,在电机设计初期具有指导意义。

关键词：定子叠片振动噪声固结方式影响规律

Oxygen microcapsules improve immune checkpoint blockade by ameliorating hypoxia condition in pancreatic ductal adenocarcinoma

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Bioactive Materials 2023年第2期20卷 259-270页

作者： Jiangchao Wu Xun Wang Li Chen Jianing Wang Junlei Zhang Jianghui Tang Yongtao Ji jinyuan song Lin Wang Yaxing Zhao Hui Zhang Taohong Li Jianpeng Sheng Dong Chen Qi Zhang Tingbo Liang Department of Hepatobiliary and Pancreatic Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou310003China Zhejiang Provincial Key Laboratory of Pancreatic Disease The First Affiliated HospitalZhejiang University School of MedicineHangzhou310003China Zhejiang University Cancer Center Zhejiang UniversityHangzhou310003China Department of Medical Oncology The First Affiliated HospitalSchool of MedicineZhejiang University#79 Qingchun RoadHangzhouZhejiang Province310003China College of Energy Engineering and State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou310027China

Rationale:Hypoxia in tumor microenvironment(TME)represents an obstacle to the efficacy of immunotherapy for pancreatic ductal adenocarcinoma(PDAC)through several aspects such as increasing the expression of immune checkpoints or promoting *** hypoxic TME is a potential strategy to improve the validity of immune checkpoint blockade(ICB).Methods:Here,we synthesized polydopamine-nanoparticle-stabilized oxygen microcapsules with excellent stabilization,bioavailability,and biocompatibility for direct oxygen delivery into tumor sites by interfacial ***:We observed oxygen microcapsules enhanced the oxygen concentration in the hypoxia environment and maintained the oxygen concentration for a long period both in vitro and in *** found that oxygen microcapsules could significantly improve the efficiency of ICB against PDAC in ***,combined treatments using oxygen microcapsules and ICB could reduce the infiltration of tumor-associated macrophages(TAMs)and polarized pro-tumor M2 macrophages into anti-tumor M1 *** addition,combined treatments could elevate the proportion of T helper subtype 1 cells(Th1 cells)and cytotoxic T lymphocytes cells(CTLs)to mediate anti-tumor immune response in ***:In summary,this pre-clinical study indicated that reversing hypoxia in TME by using oxygen microcapsules was an effective strategy to improve the performances of ICB on PDAC,which holds great potential for treating PDAC in the future.

关键词： Hypoxia PD-1 Tumor microenvironment Pancreatic ductal adenocarcinoma Oxygen microcapsules

Synergetic treatment of oxygen microcapsules and lenvatinib for enhanced therapy of HCC by alleviating hypoxia condition and activating anti-tumor immunity

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Chinese Chemical Letters 2023年第4期34卷 148-153页

作者： Jianpeng Sheng Jiangchao Wu Xianghong Yin Zhu Sun Xun Wang Junlei Zhang Jianghui Tang Yongtao Ji jinyuan song Xiaobao Wei Lin Wang Yaxing Zhao Hui Zhang Taohong Li Qi Zhang Xueli Bai Li Chen Dong Chen Tingbo Liang Department of Hepatobiliary and Pancreatic Surgery the First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310002China Zhejiang Provincial Key Laboratory of Pancreatic Disease the First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310002China Zhejiang University Cancer Center Zhejiang UniversityHangzhou 310002China School of Basic Medical Sciences Institute of Hypoxia MedicineWenzhou Medical UniversityWenzhou 325035China College of Energy Engineering and State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Department of Medical Oncology the First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310003China

Hypoxia is a typical characteristic of hepatocellular carcinoma(HCC), which causes tremendous obstacles to tumor treatments. Current first-line treatment may further deteriorate tumor hypoxia. For example,Lenvatinib, a receptor tyrosine kinase inhibitor(RTKI), suppresses tumor growth via blocking vascular endothelial growth factor(VEGF) signaling, and can also inhibit angiogenesis, thus limiting oxygen supply to tumor sites. Therefore, alleviating tumor microenvironment(TME) hypoxia holds great potential for enhancing the therapeutic effect of RTKI. Here, nanoparticle-stabilized oxygen microcapsules, a stable and biocompatible oxygen-loaded delivery system, are successfully prepared through interfacial polymerization of polydopamine nanoparticles. The microcapsules with a large loading capacity of oxygen in the core show excellent bioavailability and dispersity, which could effectively improve the hypoxic TME when they serve as oxygen delivery vehicles. Synergetic treatments of Lenvatinib and oxygen microcapsules could induce the transition of “cold tumor” in an immune-suppressed state to “hot tumor” in an immune-activated state by improving tumor hypoxic TME and reducing angiogenesis in HCC. It is revealed that combined treatments of oxygen microcapsules and Lenvatinib could polarize tumor-associated macrophages(TAMs) to anti-tumor M1 cells and activate T cell-mediated anti-tumor immune *** results suggest that synergetic therapy using oxygen microcapsules and Lenvatinib could alleviate the hypoxic TME and enhance the therapeutic performance of RTKI, demonstrating a promising anti-tumor strategy for enhanced therapy of HCC.

关键词： Hypoxia Oxygen microcapsules Lenvatinib Immune Hepatocellular carcinoma

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变频谐波对电机振动噪声特性的影响规律

电工技术学报 2021年第12期36卷 2607-2615页

作者：肖阳宋金元屈仁浩蒋伟康武汉船用电力推进装置研究所武汉430064 舰船综合电力技术重点实验室武汉436000 上海交通大学机械与动力工程学院上海200240

变频电机的振动噪声是影响电驱动产品应用的重要因素。为更准确掌握变频电机振动噪声激励,设计低噪声变频电机,该文建立变频电机振动噪声特性的一种分析模型,从变频机理出发,推导正弦脉宽调制(SPWM)变频器的输出谐波,再根据麦克斯韦定... 详细信息

变频电机的振动噪声是影响电驱动产品应用的重要因素。为更准确掌握变频电机振动噪声激励,设计低噪声变频电机,该文建立变频电机振动噪声特性的一种分析模型,从变频机理出发,推导正弦脉宽调制(SPWM)变频器的输出谐波,再根据麦克斯韦定律计算分析变频激励下电机气隙的电磁激励力特性,并基于有限元法建立电磁-固-声多场耦合仿真计算模型,最后通过对比实测电机的声功率总结出变频谐波对变频电机振动噪声特性的影响。分析结果表明,电机振动噪声在低频部分的谐波由电机的调制频率产生,而变频器引入的高频谐波会使电机在开关频率附近辐射大量的噪声,因此,低噪声变频电机的设计必须消除或者削弱这些谐波。

关键词：变频电机振动噪声变频谐波电磁-固-声耦合仿真

Adaptive Clipping for Neural Associative Memories

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Chinese Journal of Lasers 1997年第4期 85-90页

作者： CHANG Shengjiang SHEN jinyuansong Zhuang ZHANG Yanxin(Institute of Modern Optics, Nankai University, Tianjin 300071, China)

ＡｄａｐｔｉｖｅＣｌｉｐｐｉｎｇｆｏｒＮｅｕｒａｌＡｓｏｃｉａｔｉｖｅＭｅｍｏｒｉｅｓＣＨＡＮＧＳｈｅｎｇｊｉａｎｇＳＨＥＮＪｉｎｙｕａｎＳＯＮＧＺｈｕａｎｇＺＨＡＮＧＹａｎｘｉｎ（ＩｎｓｔｉｔｕｔｅｏｆＭｏｄｅｒ... 详细信息

ＡｄａｐｔｉｖｅＣｌｉｐｐｉｎｇｆｏｒＮｅｕｒａｌＡｓｏｃｉａｔｉｖｅＭｅｍｏｒｉｅｓＣＨＡＮＧＳｈｅｎｇｊｉａｎｇＳＨＥＮＪｉｎｙｕａｎＳＯＮＧＺｈｕａｎｇＺＨＡＮＧＹａｎｘｉｎ（ＩｎｓｔｉｔｕｔｅｏｆＭｏｄｅｒｎＯｐｔｉｃｓ，ＮａｎｋａｉＵｎｉ...

关键词： adaptive clipping associative memories storage capacity

一种基于KVM OVER IP的通信专业智能化集中运维方式

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智慧轨道交通 2024年第3期61卷 85-89页

作者：宋进元郑州地铁集团有限公司运营分公司河南郑州450003

随着运营线路的增多,郑州地铁已进入网络化运营的新阶段,对设备的日常维护也提出了更高的要求,通信专业设备众多,更需要通过智能运维来满足网络化运营的新要求。本文基于车站、控制中心的通信设备的维护现状,通过研究通信专业智能化集... 详细信息

随着运营线路的增多,郑州地铁已进入网络化运营的新阶段,对设备的日常维护也提出了更高的要求,通信专业设备众多,更需要通过智能运维来满足网络化运营的新要求。本文基于车站、控制中心的通信设备的维护现状,通过研究通信专业智能化集中运维方式,优化日常运维场景、故障处理场景、抢险抢修场景下人员分工和生产方式,提出新的基于KVM OVER IP的设备管理架构和运维模式,在不影响现网正常稳定运行、投资成本不高的情况下,实现地铁通信专业设备的集中化、智能化维护,进一步提升设备管理维护水平,同时为下一步建设网管网奠定基石,最终可轻松实现业务、管理2张网运行,结合大数据技术亦可实现地铁通信设备的智能监测、智能分析、智能维护,最大化的增加经济效益。

关键词：集中运维智能维护 KVM OVER IP 地铁通信智慧地铁网络化