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Frequency Control at the Power Sending Side for HVDC Asynchronous Interconnections Between Yunnan Power Grid and the Rest of CSG

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CSEE Journal of Power and Energy Systems 2021年第1期7卷 105-113页

作者： Hong Rao Wei wu Tian Mao Baorong Zhou Chao Hong Yongjun Liu xiaoshan wu the Electric Power Research Institute of China Southern Power Grid(SEPRI CSG)Guangzhou 510080China

For a large-scale high voltage direct current (HVDC)asynchronous interconnected power grid, the frequency issue atthe power sending side under DC faults is a crucial *** solve this problem, based on rotor motion equations, theeffect of unbalanced power on the system frequency under DCfaults is analyzed. The characteristics and dynamic developmentprocess of frequencies after the injection of disturbances areanalyzed. In addition, the actions and coordinated strategies ofvarious frequency control measures are also investigated. Basedon the testing projects of an asynchronous interconnection in theChina Southern Power Grid (CSG), the frequency features arestudied according to the measured PMU data. The outcome showsthat the frequency problem of the Yunnan Power Grid after anasynchronous interconnection can be solved and controlled. Italso shows that the frequency limit control (FLC) is importantfor the frequency regulation of large scale HVDC asynchronousinterconnected DC power grids. As demonstrated, DC FLC caneffectively suppress the deviation of the transient ***, reasonable frequency regulation parameters shouldbe set and other area frequency control measures should becoordinated to maintain the frequency stability of the system.

关键词： Asynchronous interconnected power grid DC overload capacity DC frequency limit control frequency stability PMU data

Comparison between Top and Bottom NiO-pinning Spin Valves: Effect of Interfacial Roughness on Specular Reflection

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Journal of Materials Science & Technology 2006年第3期22卷 397-400页

作者： Liang SUN Jun DU xiaoshan wu Shiming ZHOU Xixiang ZHANG An HU National Laboratory of Solid State Microstructures Department of Physics Nanjing University Nanjing 210093 China State Key Laboratory for Surface Physics Fudan University Shanghai 200433 China Department of Physics Hong Kong University of Science ＆ Technology Kowloon Hong Kong China

Top and bottom NiO-pinning spin valves of Si/Ta/NiO/Co/Cu/Co/Ta and Si/Ta/Co/Cu/Co/NiO/Ta were prepared by magnetron sputtering, and X-ray diffraction and giant magnetoresistance （GMR） ratio were measured in the temperature range from 5 to 300 K. For the bottom spin valve, the interracial roughness at NiO/Co is much smaller than that of Co/NiO in the top one. The Co/Cu and Cu/Co interfaces have the same roughness in the bottom and the top spin valves. NiO, Co, and Cu layers have （111） preferred orientations in the top one and random orientations in the bottom one. The GMR ratio of the bottom spin valve is larger than that of the top one at all temperatures and their difference increases with decreasing temperature.

关键词： Spin valve Specular reflection Interfacial roughness

Effects of ferrites on magnetic transport properties in La_(2/3)Sr_(1/3)MnO_3/ferrites composites

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Acta Metallurgica Sinica(English Letters) 2009年第1期22卷 51-57页

作者： Zhengyou ZHOU xiaoshan wu Jun DU Sheng XU Xiaojun BAI Guangsheng LUO Fengyi JIANG School of Materials Science and Engineering Nanchang University Nanchang 330031 China Nan.ling National Laboratory Department of Physics Nanjing University Nanjing 210093 China

Effects of soft-magnetic MnZn ferrite （Mn0.5Zn0.5Fe2O4, MZF） and hard-magnetic Ba ferrite （BaO.6Fe2O3, BaM） on the structure and magnetic transport properties of [La2/3Srl/3MnO3] （LSMO）/（x） [ferrites] （ferrites=MZF, BaM） composites have been investigated. It was found that the inclusion of MZF phase reduces magnetization and ferromagnetic-paramagnetic transition temperature （To） of the composites. With increasing the content of the dopants, the high-temperature magnetoresistance （MR） decreases, whereas low-temperature MR increases and reaches 42% at 150 K and x=0.1. However, for the LSMO/BaM composites, magnetization and ferromagneticparamagnetic transition temperature （To） decrease firstly as x〈5%, and then increase as x〉5%. The resistivity of the composites increases by five orders of magnitude at x=1% and is out of measured range at x=5%. High magnetic field has little effect on the resistivity and magnetoresistance originate from the pinning effect of BaM for the composites with x〉5%, which may grains.

关键词： Composites Magnetoresistance Spin-dependent scattering and tunneling effect

Modeling drug-induced liver injury and screening for anti-hepatofibrotic compounds using human PSC-derived organoids

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Cell Regeneration 2023年第1期12卷 338-350页

作者： xiaoshan wu Dacheng Jiang Yi Yang Shuang Li Qiurong Ding School of Biotechnology East China University of Science and TechnologyShanghai 200237P.R.China CAS Key Laboratory of Nutrition Metabolism and Food SafetyShanghai Institute of Nutrition and HealthShanghai Institutes for Biological SciencesUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031P.R.China School of Pharmacy Fujian Health CollegeFujian 350101P.R.China Shanghai Jiao Tong University Affiliated Sixth People’s Hospital Shanghai 200233China Institute for Stem Cell and Regeneration Chinese Academy of SciencesBeijing 100101P.R.China

Preclinical models that can accurately predict the toxicity and efficacy of candidate drugs to human liver tissue are in urgent *** liver organoid(HLO)derived from human pluripotent stem cells offers a possible ***,we generated HLOs,and demonstrated the utility of these HLOs in modeling a diversity of phenotypes associated with drug-induced liver injury(DILI),including steatosis,fibrosis,and immune *** changes in HLOs after treatment with tool compounds such as acetaminophen,fialuridine,methotrexate,or TAK-875 showed high concordance with human clinical data in drug safety ***,HLOs were able to model liver fibrogenesis induced by TGFβ or LPS *** further devised a high-content analysis system,and established a high-throughput anti-fibrosis drug screening system using ***208 and Imatinib were identified that can significantly suppress fibrogenesis induced by TGFβ,LPS,or *** together,our studies demonstrated the potential applications of HLOs in drug safety testing and anti-fibrotic drug screening.

关键词： Human liver organoid Pluripotent stem cell Drug-induced liver injury Anti-fibrotic compounds High-content analysis

Inorganic nitrate alleviates the senescence-related decline in liver function

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Science China(Life Sciences) 2018年第1期61卷 24-34页

作者： Haifeng Wang Lei Hu Le Li xiaoshan wu Zhipeng Fan Chunmei Zhang Jinsong Wang Jidong Jia Songlin Wang Molecular Laboratory for Gene Therapy and Tooth Regeneration Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction Capital Medical University School of Stomatology Beijing 100050 China Department of Stomatology Beijing Bo'ai Hospital China Rehabilitation Research Center School of Rehabilitation Capital Medical University Beijing 100068 China Laboratory of Molecular Signaling and Stem Cells Therapy Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction School of Stomatology Capital Medical University Beijing 100050 China Department of Btochemtstry and Molecular Biology Capital Medical University School of Basic Medical Sciences Beijing 100069 China Liver Research Center Beijing Friendship Hospital Capital Medical University Beijing 100050 China

Senescence-related decline in liver function is a common complication in the elderly that can lead to impaired health in older *** nitrate supplements have physiological and therapeutic effects on organ function by nitrate(NO_3^-)-nitrite(NO_2^-)-nitric oxide(NO)***,the role of dietary nitrate on the senescence-related decline in liver function is *** findings of the present study showed that nitrate levels in the serum and liver decreased,whereas the levels of alanine aminotransferase(ALT)and aspartate aminotransferase(AST)in serum increased in ageing ***,cell senescence,decreased glycogen levels and increased lipid deposition were found in the liver of aged mice,both glucokinase(GCK)and phosphoenolpyruvate carboxykinase(PCK)were down-regulated(n=10).Daily nitrate intake(0.5 mmol L^(-1))restored nitrate levels,decreased ALT and AST levels,and prevented cell senescence and structural and glucose and lipid metabolism degeneration in liver tissue both in D-galactose(D-gal)-induced ageing mice(n=10)and in natural aged mice(n=10).In conclusion,the present study demonstrated that the reduction of nitrate levels was correlated with liver degeneration in ageing individuals and that dietary supplement of nitrate could restore the nitrate levels in serum and the liver and prevent ageing-related liver degeneration.

关键词： nitrate liver senescence degeneration

Mandible exosomal ssc-mir-133b regulates tooth development in miniature swine via endogenous apoptosis

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Bone Research 2018年第4期6卷 408-417页

作者： Ye Li Xinxin Wang Jiali Ren xiaoshan wu Guoqing Li Zhipeng Fan Chunmei Zhang Ang Li Songlin Wang Molecular Laboratory for Gene Therapy and Tooth Regeneration Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction School of Stomatology Capital Medical University Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of Stomatology Xi'an Jiaotong University Laboratory of Molecular Signaling and Stem Cell Therapy Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction School of Stomatology Capital Medical University Department of Biochemistry and Molecular Biology Capital Medical University School of Basic Medical Sciences

Signal transduction between different organs is crucial in the normal development of the human body. As an important medium for signal communication, exosomes can transfer important information, such as microRNAs(miRNAs), from donors to *** are known to fine-tune a variety of biological processes, including maxillofacial development; however, the underlying mechanism remains largely unknown. In the present study, transient apoptosis was found to be due to the expression of a miniature swine maxillofacial-specific miRNA, ssc-mir-133b. Upregulation of ssc-mir-133b resulted in robust apoptosis in primary dental mesenchymal cells in the maxillofacial region. Cell leukemia myeloid 1(Mcl-1) was verified as the functional target, which triggered further downstream activation of endogenous mitochondria-related apoptotic processes during tooth *** importantly, mandible exosomes were responsible for the initial apoptosis signal. An animal study demonstrated that ectopic expression of ssc-mir-133 b resulted in failed tooth formation after 12 weeks of subcutaneous transplantation in nude mice. The tooth germ developed abnormally without the indispensable exosomal signals from the mandible.

关键词： In As

Optical spectroscopy study of Ca_3(Ru_(0.91)Mn_(0.09))_2O_7 single crystal in high magnetic fields

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Science Bulletin 2019年第1期64卷 20-25页

作者： Xueli Xu Jin Peng Junpei Zhang Zongwei Ma Cheng Chen Junbo Han Bingjie Liu Lingfang Lin xiaoshan wu Zhiqiang Mao Zhe Qu Zhigao Sheng Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory Chinese Academy of Sciences University of Science and Technology of China Collaborative Innovation Center of Advanced Microstructures Nanjing University School of Physics Southeast University wuhan National High Magnetic Field Center Huazhong University of Science and Technology School of Physics Nanjing University Department of Physics and Engineering Physics Tulane University

The magneto-optical spectrum, with magnetic fields up to 42 T, of double layered ruthenates Ca_3(Ru_(0.91)Mn_(0.09))_2O_7(CRMO) single crystal is studied. Both the temperature and magnetic field induced insulator-to-metal transitions(IMTs) are observed via magneto-optical properties of the crystal. The critical magnetic field(H//c) of IMT for CRMO is found to be as large as 35 T at 5 K. The fine structure of optical spectra identified the antiferromagnetic/ferro-orbital-ordering configurations of Ru 4d orbitals at low temperatures. Meanwhile, the configuration of orbital polarization of such double-layer CRMO single crystal is discussed. These results suggest that the orbital degree of freedom plays an important role in the field induced IMT of multi-orbital system.

关键词： Ruthenates High magnetic field Optical spectroscopy Insulator to metal transition

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清初“墨憨主人”为冯梦龙后人——冯焴考

明清小说研究 2007年第2期 188-193页

作者：吴小珊江西财经大学科研处

本文是对清初出版家"墨憨斋主人"的考证。根据"墨憨斋"所出小说《十二笑》、《醒名花》、《百练真海烈妇传》序后图章、所附诗歌的题署和其他资料,推导出清初"墨憨斋主人"就是冯梦龙的后人冯焴。

关键词：墨憨斋主人冯梦龙冯焴

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“山水邻”与冯梦龙

明清小说研究 2008年第3期 240-247页

作者：吴小珊江西财经大学科研处

由清初本衙藏板《贯华堂评论金云翘传》序末题署之印章"天花藏主人"和"山水邻",知天花藏主人又有"山水邻"的名号。由于天花藏主人所刊小说序后题署一般加盖"天花藏"、"素政堂"印章,通常认为素政堂主人即天花藏主人,所以,山水邻主人也应... 详细信息

由清初本衙藏板《贯华堂评论金云翘传》序末题署之印章"天花藏主人"和"山水邻",知天花藏主人又有"山水邻"的名号。由于天花藏主人所刊小说序后题署一般加盖"天花藏"、"素政堂"印章,通常认为素政堂主人即天花藏主人,所以,山水邻主人也应是素政堂主人。有学者提出素政堂为冯梦龙之堂,在清初为其后人冯焴所继承,本文考证山水邻也同样是冯梦龙之堂,并同样在清初为冯焴所继承。

关键词：山水邻主人天花藏主人素政堂冯梦龙冯埔