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| 1 | Effect of Ti-V-Nb-Mo addition on microstructure of high chromium cast iron显示文摘The effects of trace additions of multi-alloying elements(Ti,Nb,V,Mo)on carbides precipitation and as- cast microstructure of eutectic high chromium cast iron containing 2.85wt.%C and 31.0wt.%Cr were investigated from thermodynamic and kinetic considerations.The thermodynamic calculations show that Ti and Nb exist in the multi-alloying system in the forms of TiC and NbC.The formation of VC during the solidification is not feasible from the thermodynamic consideration.XRD analysis shows that the V exists in alloy compounds(VCr2C2,VCrFe8).The first precipitated high melting point particles(TiC,NbC)can act as the heterogeneous substrate of M7C3 carbides, which results in significant refinement of the M7C3 carbides.After the addition of alloying elements,C atom diffusion is hindered due to the strong affinities of the strong carbide forming elements for carbon,which decreases the growth rate of carbides.The combined roles of the increase of nucleation rate and the decrease of carbides growth rate lead to the finer microstructure. | Ma Youping Li Xiulan Liu Yugao Zhou Shuyi Dang Xiaoming | 2012 | China Foundry2012，9，2： | 6 |
| 2 | Rapid growth of a large-scale(600 mm aperture) KDP crystal and its optical quality显示文摘Potassium dihydrogen phosphate(KDP) single crystals are the only nonlinear crystals currently used for electro-optic switches and frequency converters in inertial confinement fusion research, due to their large dimension and exclusive physical properties. Based on the traditional solution-growth process, large bulk KDP crystals, usually with sizes up to600 × 600 mm2 so as to make a frequency doubler for the facility requirement loading highly flux of power laser, can be grown in standard Holden-type crystallizers, without spontaneous nucleation and visible defects, one to two orders of magnitude faster than by conventional methods. Pure water and KDP raw material with a few ion impurities such as Fe,Cr, and Al(less than 0.1 ppm) were used. The rapid-growth method includes extreme conditions such as temperature range from 60 to 35℃ , overcooling up to 5℃ , growth rates exceeding 10 mm/day, and crystal size up to 600 mm. The optical parameters of KDP crystals were determined. The optical properties of crystals determined indicate that they are of favorable quality for application in the facility. | Guohui Li Guozong Zheng Yingkun Qi Peixiu Yin En Tang Fei Li Jing Xu Taiming Lei Xiuqin Lin Min Zhang Junye Lu Jinbo Ma Youping He Yuangen Yao | 2014 | High Power Laser Science and Engineering2014，2，1： | 3 |
| 3 | Impact of clinical research on public health policy of neonatal screening for congenital heart disease in China显示文摘Congenital heart disease(CHD)is one of the most common congenital malformations,with a prevalence of approximately 1%in live births.[1,2]Among them,1/4 to 1/3 are major CHD,including critical CHD(CCHD)and serious CHD,which require surgical or catheter intervention before 1 year of age.[3]Major CHD,if left untreated,may cause serious outcomes,such as heart failure,cardiogenic shock,acidosis,and hypoxic-ischemic brain damage,and is one of the leading causes of infant death and childhood disability.[4]The missed diagnosis rate of CCHD in four nurseries ranges from 13%to 48%in developed countries,[4,5]but in China,is>71%before serious symptoms occur after birth.[6]Therefore,screening for CHD is useful for early detection,diagnosis,and treatment and helps to improve prognosis and reduces the medical,economic,and mental burden to both the family and the society.[5,7] | Miao Yang Youping Tian Pin Jia Xiaojing Ma Xiaoling Ge Xiaojing Hu Quming Zhao Fang Liu Bing Jia Weili Yan Qing Gu Guoying Huang | 2022 | Chinese Medical Journal2022，，11： | 3 |
| 4 | Flashover Behavior of Cone-type Spacers with Inhomogeneous Temperature Distribution in SF_(6)/N_(2)-filled DC-GIL Under Lightning Impulse with DC Voltage Superimposed显示文摘Before designing DC gas insulated transmission lines(GIL),the insulation characteristics of spacers under a lightning impulse(LI)voltage with a superimposed DC voltage must be clarified.Many experiments have been performed to guide the development of the DC spacer.However,the impacts of thermal stresses on their insulation performance under combined voltage are always neglected,and little attention has been given to the insulation characteristics of spacers in an eco-friendly gas filled DC-GIL.To solve these problems,an experiment setup with the abilities to load the thermal field and the DC voltage with LI voltage superimposed on the cone-type spacer are built.After that,the insulation characteristics of spacers under the combined voltage of DC with lightning impulse at 0.1 MPa SF_(6)/N_(2) gas mixtures are investigated,under different thermal stress conditions.The experiment’s results indicate that:1)The flashover voltage of spacers under the same polarity superimposed voltages is slightly higher than that under LI alone.Conversely,the flashover voltage under reverse polarity superimposed voltages is lower than that under LI alone.2)The longer the duration of the foregoing DC voltage,the differences between the flashover voltage under superposed voltage and that under LI alone are larger.3)The combined flashover voltages are reduced under thermal stress.To ensure the insulation performance of newly designed DC spacers,the insulation test is suggested to be applied under thermal stress and combined voltage of the DC with lightning impulse,especially for superimposed reverse polarity. | Guoming Ma Hongyang Zhou Yuan Wang Hanchi Zhang Shijie Lu Youping Tu Jian Wang Chengrong Li | 2020 | CSEE Journal of Power and Energy Systems2020，6，2： | 2 |
| 5 | Feasibility of C_(3)F_(7)CN/CO_(2)gas mixtures in high-voltage DC GIL:a review on recent advances显示文摘With the rise of renewable energy resources,especially offshore wind power plant,the DC transmission concept has attracted more and more attention.The selection of eco-friendly insulating gas,as most critical insulating part of gas-insulated equipment is top priority for developing highly reliable system.Moreover,it is acknowledged that eco-friendly C_(3)F_(7)CN/CO_(2) gas mixtures have become a potential alternative to SF_(6) gas due to its excellent performance.This study reviews the basic physical properties of C_(3)F_(7)CN gas/gas mixtures and insulation properties including the gas gap breakdown and surface flashover performance at DC,as well as lightning impulse voltage.Investigation about the gas stability is presented,including the compatibility of gas with solid materials in gas-insulated transmission line(GIL),and the decomposition characteristics under long-term electrical and thermal stresses.The important progress on the charge accumulation characteristics of gas-solid interface in the novel gas environment under DC voltage stress is analysed.Finally,the key issues that need to be paid attention to and further followed through regarding the application of this novel gas in GIL are summarised and put forward.This study hopefully can provide a complete reference for the development of eco-friendly DC gas insulation equipment with C_(3)F_(7)CN/CO_(2) gas mixtures. | Youping Tu Geng Chen Cong Wang Yuming Shao Yujing Tong Chuanyang Li Guoming Ma Tohid Shahsavarian | 2020 | High Voltage2020，5，4： | 2 |
| 6 | Effects of characteristics of rubber, mixing and vulcanization on the structure and properties of rubber/clay nano-composites by melt blending 显示文摘 | Wu Youping Ma Yong Wang Yiqing | 2004 | Macromolecular Materials and Engineering2004，289，10： | 1 |
| 7 | Application of artificial neural network in prediction of abrasion of rubber composites显示文摘 | Wang Bin Ma Jianhua Wu Youping | | 0，，： | 1 |
| 8 | The effect of solid diffusion surface alloying on properties of ZM5 magnesium alloy 显示文摘 | Ma Youping Xu Kewei Wen Weixin | 2005 | Surface & Coatings Technology2005，190，23： | 1 |
| 9 | Environment-friendly Insulating Gases for HVDC Gas-insulated Transmission Lines显示文摘Environment-friendly gas insulating mediums adapted to a DC gas-insulated transmission line(GIL)electric field condition is the key to the next generation of Environment-friendly HVDC GILs.In this paper,we review the literature on sulfur hexafluoride(SF6)alternatives including the scientific understanding,control,and implementation of gas-solid systems in this type of power transmission.First,the structure-activity relationship between the molecular structure and physico-chemical properties of Environment-friendly insulating gases is presented.Then,the search and prediction of important physicochemical properties of gases are summarized.Subsequently,in view of the potential of environmental friendly insulating gases,the swarm parameters of gas discharge and breakdown properties in a quasi-uniform field,inhomogeneous field,and at the gas-solid interface,that need to be taken into account with industrialized DC GILs are discussed.The latest research progress on insulation characteristics,especially the polarity effect in DC gas-solid insulation systems,the sensitivity to the electrode surface state,and the non-uniformity of the electric field,and the influence of metal particles and their variation with air pressure,is highlighted.In addition,the heat transfer characteristics of insulating gases,related to DC GIL transmission with a large current-carrying capacity and the influence of alternative gases on the heat transfer characteristics are described.Finally,aiming at solving the contradiction of low environmental impact,high dielectric strength and low liquefaction temperatures in the selection of alternative gases,an coordinated regulation model for Environment-friendly gases in DC GILs is established.Considerations for future work on this topic are also presented. | Geng Chen Youping Tu Cong Wang Jue Wang Zhikang Yuan Guoming Ma Jian Wang Bo Qi Chuanyang Li | 2021 | CSEE Journal of Power and Energy Systems2021，7，3： | 1 |
| 10 | The role of rubber characteristics in preparing rubber/clay nanocomposites by melt compounding 显示文摘 | Ma Yong Wu Youping Zhang Liqun Li Qifang | 2008 | Journal of Applied Polymer Science2008，109，19： | 1 |
| 11 | Effects of characteristics of rubber,mixing and vulcanization on the structure and properties of rubber/clay nanocomposites by melt blending显示文摘 | Wu Youping Ma Yong Wang Yiqing | 2004 | Macro Mater Engng2004，289，12： | 1 |
| 12 | The role of rubber characteristics in preparing rubber/clay nanocomposites by melt compounding 显示文摘 | Ma Yong Wu Youping Zhang Liqun Li Qifang | 2008 | Journal of Applied Polymer Science2008，109，： | 1 |
| 13 | Effects of characteristics of rubber,mixing and vulcanization on the structure and properties of rubber/clay nanocomposites by melt blending显示文摘 | Wu Youping Ma Yong Wang Yiqing Zhang Liqun | | 0，，10： | 1 |
| 14 | Structure and properties of organoclay/EPDM nanocomposites: Influence of ethylene contents 显示文摘 | Ma Yong Wu Youping Wang Yiqing | 2006 | Journal of Applied Polymer Science2006，99，3： | 1 |
| 15 | Research of the national scale platform of distant education 显示文摘 | Ma Jianguo Li Youping etc | 2002 | Distance Education in China2002，7，186： | 1 |
| 16 | The role of rub- ber characteristics in preparing rubber/clay nanocomposites by melt compounding显示文摘 | Ma Yong Wu Youping Zhang Liqun | 2008 | Journal of Applied Polymer Science2008，109，3： | 1 |
| 17 | Technical and economic analysis of Ni-containing hot metal production with laterite in blast furnaces显示文摘In recent years,many Ni-containing materials manufactured from laterite have played a significant role in supporting the rapid development of the stainless steel industry in China. Currently,pyrometallurgy is the main process for laterite smelting,where blast furnaces are employed to make Ni-containing hot metal. With the aim of giving some references for making good use of laterite,technical and economic analysis was conducted in this paper,based on the discussion of the key technologies of Ni-containing hot metal production with laterite ( 50. 4% Fe) in blast furnaces. | ZHANG Youping CHU Bin CHEN Yan CHEN Xiangming MA Teng | 2012 | Baosteel Technical Research2012，6，2： | 0 |
| 18 | Review of Charge Accumulation on Spacers of Gas Insulated Equipment at DC Stress显示文摘Charge accumulation on the spacer surface in gas insulated equipment is very severe in the DC field,leading to easy flashover,which restricts the application of DC GIS/GIL.Therefore,knowledge about the charge accumulation characteristics of gas insulated equipment at DC stress is essential.In this paper,we reviewed the research methods and the characteristics of charge accumulation on spacers.A summary of charge measurement methods and setups are presented.And the surface charge inversion algorithms are introduced.Then the simulation model for charge accumulation in the DC field is reviewed.Subsequently,the charge accumulation mechanisms and phenomenon,the influence factor of surface charge accumulation and the influence of accumulated charge on spacer insulation characteristics are summarized.In addition,some suppression methods of surface charge accumulation are discussed.Finally,based on the understanding of charge accumulation on spacers,some suggestions on further studies are presented to aid in the design of a better spacer free from surface charges. | Hongyang Zhou Guoming Ma Cong Wang Jue Wang Guixin Zhang Youping Tu Chengrong Li | 2020 | CSEE Journal of Power and Energy Systems2020，6，3： | 0 |
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