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Acta Metallurgica Sinica(English Letters) 2024年第5期37卷 793-807页

作者： jinpeng Hu Tao sun Fujun Cao Yifu Shen Zhiyuan Yang Chan Guo College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics(NUAA)Nanjing 210016China

Submerged friction stir processing(SFSP)with flowing water was employed to alleviate the porosities and coarse-grained structure introduced by wire-arc *** a result,uniform and ultrafine grained(UFG)structure with average grain size of 0.83μm was achieved with the help of sharply reduced heat input and holding time at elevated *** optimized UFG structure enabled a superior combination of strength and ductility with high ultimate tensile strength and elongation of 273.17 MPa and 15.39%.Specifically,grain refinement strengthening and decentralized θ(Al_(2)Cu)phase in the sample subjected to SFSP made great contributions to the enhanced *** addition,the decrease in residual stresses and removal of pores substantially enhance the *** rates of cooling and low temperature cycling,which are facilitated by the water-cooling environment throughout the machining process,are vital in obtaining superior *** work provides a new method for developing a uniform and UFG structure with excellent mechanical properties.

关键词： Submerged friction stir processing Wire-arc additive manufacturing Al-Cu alloy Residual stress Strengthening and toughening mechanism Ultrafine grained microstructure

Insights into the intrinsic interaction between series of C1 molecules and surface of NiO oxygen carriers involved in chemical looping processes

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Chinese Journal of Chemical Engineering 2020年第11期28卷 2771-2777页

作者： jinpeng Zhang Hongfeng Gao Nini Yuan QiangWang YuhuaWu Yanli sun Hongcun Bai State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China Beijing Institute of New Energy Technology Beijing 102300China

Understanding and modulating the interaction between various reactive molecules and oxygen carriers are the key issue to achieve process intensification of chemical looping technology.C1 chemical molecules play an important role in many reactions involved with chemical looping ***,up to now,there is still a lack of systematic and in-depth understanding of the adsorption mechanism of C1 molecules on the surface of oxygen carriers(OCs).In this work,the intrinsic interaction between a series of C1 molecules composed of CH4,CO,CO2,CH3OH,HCHO and HCOOH and surface of Ni O OCs in the chemical looping process have been studied using density functional theory *** adsorption configurations of C1 molecules and also different adsorption sites of Ni O have been *** structural features of stable configuration of C1 molecules on the surface of NiO OCs have been ***,the interacted sites,types and strengths of C1 molecules on the surface of NiO have been directly pictured by the independent gradient model ***,the nature of the interaction between C1 molecule and Ni O surface has been investigated with the aid of energy decomposition analysis from a quantitative view.

关键词： Oxygen carrier Chemical looping C1 chemistry Adsorption Molecular modeling DFT

Temperature‐dependent electric field distribution in±800 kV valve‐side bushing insulation for a converter transformer

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High Voltage 2021年第1期6卷 106-115页

作者： Boxue Du Hanlei sun jinpeng Jiang Xiaoxiao Kong Wei Yang School of Electrical and Information Engineering Tianjin UniversityTianjinChina State Key Laboratory of Advanced Power Transmission Technology State Grid Global Energy Interconnection Research InstituteBeijingChina

The electric field distribution is determined for the design and long‐term performance of bushing yet gets complicated when coupled with temperature due to the highly tem-perature‐dependent conductivity of *** electrothermal coupling model is established based on a�800 kV converter transformer valve‐side *** measured temperature‐dependent conductivity of insulation is adopted and *** electric field distribution inside a condenser core under the influence of temperature was investigated,and the related mechanism was analysed,considering the different voltage forms,loading currents,and changeable ambient *** temperature gradient within the condenser core is verified,and the electric field migration is *** is indicated that the electric field strength shows a strong dependence on temperature and increases along the radial *** maximum field strength appears at the outmost shield layer under the operating voltage and the load current 4500 A,which is higher than that under the DC long‐term withstand voltage of 1455 kV without thermal *** increased load current,decreased oil temperature,and enhanced valve hall temperature will lead to more serious electric field distortion,and unacceptable dielectric stress may *** attention should be paid to the design and operation of bushing for DC applications.

关键词： distribution insulation field

Numerical analysis on combustion characteristics of hybrid rocket motor with star-tube segmented grain

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Chinese Journal of Aeronautics 2023年第12期36卷 102-112页

作者： Chengen LI Zongwei WANG Jin YANG jinpeng JIANG Fan GONG Zhu LIU Yu sun Science and Technology on Space Physics Laboratory Beijing 100076China

A method of star-tube combined segmented grain is proposed to improve the combustion performance of hybrid rocket *** star-tube combined segmented grain consists of a single-port star part and a single-port tube part.A mid-chamber forms between the fore-grain and the aft-grain for better mixing *** single-port feature gives hybrid rocket motor several advantages,such as simple structure,high reliability,and variable *** paper is mainly aimed at studying the combustion characteristics of hybrid rocket motor with star-tube segmented grain through three-dimensional steady *** performance of the motors with different segmented grain combinations,including fore-tube/aft-tube,fore-tube/aftstar,fore-star/aft-star and fore-star/aft-tube,is contrastively *** motor in this paper adopts polyethylene and 90%hydrogen peroxide as the *** reveal that segmented grain with different-type grain combinations could greatly change the flow field in the second half of the combustion *** of the flow field is beneficial to the mixing between the fuel and the oxidizer,and it could increase the fuel regression rate and the combustion *** turbulence effect of tube aft-grain is better than that of star *** the four segmented grain combinations,the combination of star fore-grain and tube aft-grain is the preferred method with optimal overall *** grain configuration could increase the regression rate of tube aft-grain to surpass that of star aft-grain in other ***,hybrid rocket motor with this grain configuration achieves the highest combustion efficiency.

关键词： Combustion performance Flow fields Fluid-solid coulping Hybrid rocket motor Star-tube segmented grain

CROWN:A service grid middleware with trust management mechanism

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Science in China(Series F) 2006年第6期49卷 731-758页

作者： HUAI jinpeng HU Chunming LI Jianxin sun Hailong WO Tianyu School of Computer Science & Engineering Beihang University Beijing 100083 China

Based on a proposed Web service-based grid architecture, a service grid middleware system called CROWN is designed in this paper. As the two kernel points of the middleware, the overlay-based distributed grid resource management mechanism is proposed, and the policy-based distributed access control mechanism with the capability of automatic negotiation of the access control policy and trust management and negotiation is also discussed in this paper. Experience of CROWN testbed deployment and application development shows that the middleware can support the typical scenarios such as computing-intensive applications, data-intensive applications and mass information processing applications.

关键词： Grid computing service grid middleware resource management distributed access control trust management CROWN.

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催干剂对水性自干环氧磷酸酯涂料的影响

云南化工 2018年第12期45卷 1-3页

作者：孙金鹏肖聪利程建军马成龙侯会丰北华航天工业学院材料学院河北廊坊065000 北京金汇利应用化工制品有限公司北京101101

研究了催干剂对水性自干环氧磷酸酯涂料的黏度、搅拌速度、表干和实干、光泽度和阻尼摆杆硬度等性能参数的影响。结果显示,随着催干剂用量的增加,涂料体系的黏度增大,乳液稳定性变差。当转速为1500r/min时,高速分散机具备较高的研磨效率... 详细信息

研究了催干剂对水性自干环氧磷酸酯涂料的黏度、搅拌速度、表干和实干、光泽度和阻尼摆杆硬度等性能参数的影响。结果显示,随着催干剂用量的增加,涂料体系的黏度增大,乳液稳定性变差。当转速为1500r/min时,高速分散机具备较高的研磨效率,涂料体系具备较好的稳定性和静置返粗效果;加入催干剂CG6206的涂料体系具备较低的黏度、最快的实干速度、最高的干燥硬度以及较好的保光性,当其用量在4份时综合效果最佳。

关键词：催干剂环氧磷酸酯阻尼摆杆硬度乳液稳定性

Revealing the origin of the photo-instability to improve the performance of PbS quantum dot solar

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Nano Research 2024年第12期17卷 10644-10648页

作者： Chunyan Wu jinpeng Yang Shuo Ding Tengzuo Huang Tao sun Lei Qian Chaoyu Xiang Laboratory of Advanced Nano-Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315336China Laboratory of Advanced Nano-Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China International Joint Research Center of China for Optoelectronic and Energy Materials Energy Research InstituteYunnan UniversityKunming 650091China Department of Mechanical Materials and Manufacturing EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100China

Stability under light is critical for lead sulfide quantum dots(PbS QDs)in solar cell *** improve the stability of PbS QDs solar cells,the influence of the light illumination on the performance of the as-prepared PbS QDs solar cells was carefully *** with X-ray and ultraviolet photoelectron spectroscopies,it was revealed that the 1,2-ethanedithiol(EDT)ligands of the hole transport p-type PbS QDs reacted with the ligands of the PbS QDs active layer under light *** reaction not only undermines the n-type characteristics of the active layer,but also increases the number of defects,leading to a serious deterioration in device *** interface layer was introduced to block the EDT penetration to avoid this issue,significantly improving the stability of the device under light ***,the separation of carriers was also enhanced due to the better matching the energy level of the interface *** device with an interface layer yielded a power conversion efficiency of 12.55%and sustained to a long time light illumination.

关键词： solar cell lead sulfide quantum dots(PbS QDs) photo-instability interlayer lght illumination

足三里穴位注射治疗放化疗后白细胞减少的临床观察

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中医药临床杂志 2015年第9期27卷 1266-1268页

作者：张宝昕李卫段胜刚刘博孙金鹏张玉王思蓓河北省沧州中西医结合医院河北沧州061000 河北省沧州医学高等专科学校河北沧州061000

目的:探讨对放化疗后白细胞减少患者给予地塞米松足三里穴位注射的疗效。方法:对本院所收治的放化疗后白细胞减少的患者148例,随机分成2组,实验组76例,双侧足三里注射地塞米松;对照组72例,给予利血生治疗,15d后比较2组临床疗效。结果:... 详细信息

目的:探讨对放化疗后白细胞减少患者给予地塞米松足三里穴位注射的疗效。方法:对本院所收治的放化疗后白细胞减少的患者148例,随机分成2组,实验组76例,双侧足三里注射地塞米松;对照组72例,给予利血生治疗,15d后比较2组临床疗效。结果:观察组有效率为82.9%,对照组为31.9%。2组比较有非常显著性差异(P<0.01)。结论:地塞米松足三里穴位注射治疗放化疗后白细胞减少症见效迅速,有效率高。

关键词：足三里白细胞减少放化疗穴位注射

易误诊为脊髓外伤的硬脊膜动静脉瘘:1例报道并文献复习

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国际脑血管病杂志 2023年第3期31卷 237-240页

作者：朱心怡林毅兴孙金鹏张燕楠马敏敏南京大学医学院附属金陵医院(东部战区总医院)神经内科南京210002 南京大学医学院附属金陵医院(东部战区总医院)神经外科南京210002 海南省文昌市人民医院神经内科 571300

硬脊膜动静脉瘘(spinal dural arteriovenous fistula,SDAVF)是硬脊膜或神经根动脉与脊髓引流静脉之间形成的异常分流,其年发病率约为(5~10)/100万,占脊髓血管畸形的60%~80%[1]。SDAVF大多起病隐匿、进展缓慢,症状以下肢乏力、感觉障碍... 详细信息

硬脊膜动静脉瘘(spinal dural arteriovenous fistula,SDAVF)是硬脊膜或神经根动脉与脊髓引流静脉之间形成的异常分流,其年发病率约为(5~10)/100万,占脊髓血管畸形的60%~80%[1]。SDAVF大多起病隐匿、进展缓慢,症状以下肢乏力、感觉障碍和排尿功能障碍为主,临床表现缺乏特异性,易被误诊。SDAVF自然转归不佳,若不及时治疗,可导致永久性脊髓损伤。本文报道了1例外伤后急性起病的患者,临床表现为脊髓受损症状,而后影像学检查提示SDAVF,最终通过手术找到瘘口并阻断治疗。同时,结合该病例对相关文献进行复习,希望提高临床对该病的认识,以期早期诊治,改善预后。

关键词：硬脊膜动静脉瘘脊髓血管畸形排尿功能障碍感觉障碍脊髓外伤自然转归根动脉脊髓受损

Activation of MAPK-mediated immunity by phosphatidic acid in response to positive-strand RNA viruses

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Plant Communications 2024年第1期5卷 84-100页

作者： Jiayu Lin jinpeng Zhao Linlin Du Pengkun Wang Bingjian sun Chao Zhang Yan Shi Honglian Li Hangjun sun The Engineering Research Center for Plant Health Protection Technology in Henan Province College of Plant ProtectionHenan Agricultural UniversityZhengzhouHenan 450046China

Increasing evidence suggests that mitogen-activated protein kinase(MAPK)cascades play a crucial role in plant defense against ***,the mechanisms that underlie the activation of MAPK cascades in response to viral infection remain *** this study,we discovered that phosphatidic acid(PA)repre-sents a major class of lipids that respond to Potato virus Y(PVY)at an early stage of *** identified NbPLDa1(Nicotiana benthamiana phospholipase Da1)as the key enzyme responsible for increased PA levels during PVY infection and found that it plays an antiviral role.6K2 of PVY interacts with NbPLDa1,lead-ing to elevated PA *** addition,NbPLDa1 and PA are recruited by 6K2 to membrane-bound viral repli-cation *** the other hand,6K2 also induces activation of the MAPK pathway,dependent on its interaction with NbPLDa1 and the derived *** binds to WIPK/SIPK/NTF4,prompting their phosphoryla-tion of ***,spraying with exogenous PA is sufficient to activate the MAPK ***-down of the MEK2-WIPK/SIPK-WRKY8 cascade resulted in enhanced accumulation of PVY genomic RNA.6K2 of Turnip mosaic virus and p33 of Tomato bushy stunt virus also interacted with NbPLDa1 and induced the activation of MAPK-mediated *** of function of NbPLDa1 inhibited virus-induced activation of MAPK cascades and promoted viral RNA ***,activation of MAPK-mediated immunity by NbPLDa1-derived PA is a common strategy employed by hosts to counteract positive-strand RNA virus infection.

关键词： Potato virus Y PVY positive-strand RNA virus +RNA virus phosphatidic acid PA NbPLDa1 MAPK WIPK/SIPK