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| 1 | Aerodynamic simulation of evacuated tube maglev trains with different streamlined designs显示文摘Based on the Navier-Stokes (N-S) equations of incompressible viscous fluids and the standard k-ε turbulence model with assumptions of steady state and two dimensional conditions, a simulation of the aerodynamic drag on a maglev train in an evacuated tube was made with ANSYS/FLOTRAN software under different vacuum pressures, blockage ratios, and shapes of train head and tail. The pressure flow fields of the evacuated tube maglev train under different vacuum pressures were analyzed, and then compared under the same blockage ratio condition. The results show that the environmental pressure of 1 000 Pa in the tube is the best to achieve the effect of aerodynamic drag reduction, and there are no obvious differences in the aerodynamic drag reduction among different streamline head shapes. Overall, the bluntshape tail and the blockage ratio of 0.25 are more efficient for drag reduction of the train at the tube pressure of 1 000 Pa. | Xuyong CHEN Lifeng ZHAO Jiaqing MA Yuansen LIU | 2012 | Journal of Modern Transportation2012，20，2： | 11 |
| 2 | The approach to calculate the aerodynamic drag of maglev train in the evacuated tube显示文摘In order to study the relationships between the aerodynamic drag of maglev and other factors in the evacuated tube,the formula of aerodynamic drag was deduced based on the basic equations of aerodynamics and then the calculated result was confirmed at a low speed on an experimental system developed by Superconductivity and New Energy R&D Center of South Jiaotong University.With regard to this system a high temperature superconducting magnetic levitation vehicle was motivated by a linear induction motor(LIM) fixed on the permanent magnetic guideway.When the vehicle reached an expected speed,the LIM was stopped.Then the damped speed was recorded and used to calculate the experimental drag.The two results show the approximately same relationship between the aerodynamic drag on the maglev and the other factors such as the pressure in the tube,the velocity of the maglev and the blockage ratio.Thus,the pressure,the velocity,and the blockage ratio are viewed as the three important factors that contribute to the energy loss in the evacuated tube transportation. | Jiaqing Ma Dajing Zhou Lifeng Zhao Yong Zhang Yong Zhao | 2013 | Journal of Modern Transportation2013，21，3： | 10 |
| 3 | The time and space characteristics of magnetomotive force in the cascaded linear induction motor显示文摘To choose a reasonable mode of three-phase winding for the improvement of the operating efficiency of cascaded linear induction motor,the time and space characteristics of magnetomotive force were investigated.The ideal model of the cascaded linear induction motor was built,in which the B and C-phase windings are respectively separated from the A-phase winding by a distance of d and e slots pitch and not overlapped.By changing the values of d and e from 1 to 5,we can obtain 20 different modes of three-phase winding with the different combinations of d and e.Then,the air-gap magnetomotive forces of A-,B-,and C-phase windings were calculated by the magnetomotive force theory.According to the transient superposition of magnetomotive forces of A-,B-,and C-phase windings,the theoretical and simulated synthetic fundamental magnetomotive forces under 20 different arrangement modes were obtained.The results show that the synthetic magnetomotive force with d = 2 and e = 4 is close to forward sinusoidal traveling wave and the synthetic magnetomotive force with d = 4 and e = 2 is close to backward sinusoidal traveling wave,and their amplitudes and wave velocities are approximately constant and equal.In both cases,the motor could work normally with a high efficiency,but under other 18 arrangement modes(d = 1,e = 2;d = 1,e = 3;d = 1,e = 4;…),the synthetic magnetomotive force presents obvious pulse vibration and moves with variable velocity,which means that the motor did not work normally and had high energy loss. | Dajing Zhou Jiaqing Ma Lifeng Zhao Xiao Wan Yong Zhang Yong Zhao | 2013 | Journal of Modern Transportation2013，21，3： | 2 |
| 4 | A novel method to calculate the thrust of linear induction motor based on instantaneous current value显示文摘Because of the end effect, a linear induction motor (LIM) runs in an asymmetrical state even though the winding of each phase is symmetric. Based on the basic principle of the LIM, a new approach was proposed to calcu-late the thrust of the LIM using the instantaneous current value. A three-phase LIM model with 12 slots and a single-layer winding was designed to validate this method. The experiments show that when the current is small, the calculated results basically agree with the experiments. The agreement becomes worse with the increase of the current because of the saturation of the primary iron core. The proposed formula is suitable when the iron core of the LIM primary is in an unsaturated state. | Jiaqing MA Yunpeng ZHU Jing JIANG | 2012 | Journal of Modern Transportation2012，20，2： | 2 |
| 5 | The entropy characters of point mutation显示文摘The biological diversity, which depends on the genetic material DNA, is the foundation for a species to survive and evolve. The entropy is the best measurement of biological diversity. Based on the sin-gle-parameter and the two-parameter models, here we established some differential equations about the point mutation of a DNA sequence with finite length, as well as some functions describing the processes of the variation in quantities of 4 kinds of bases (A, T, G and C) in the DNA sequence. At the molecular level, we discussed the entropy characteristics of point mutation. The results proved that a species maintained its entropy and evolved in the direction of the increasing biological diversity. In order to testify the theoretical results, we did a series of computer simulations of random point muta- tion in Matlab environment. The results were well consistent with the theoretical researches. | MA GuoJi LIANG LiJing FAN YanHui WANG WenJuan DAI JiaQing YUAN ZhiFa | 2008 | Chinese Science Bulletin2008，53，19： | 2 |
| 6 | Biomass-derived nitrogen self-doped porous activation carbon as an effective bifunctional electrocatalysts显示文摘The strategy of adopting cheap precursors or abundant resources,which can be obtained directly from nature,is a simple and excellent method of introducing accessible research into environmentally friendly development.Moreover,this is also an urgent requirement for the sustainable development of green technology.Herein,we introduce a simplistic and expandable method to prepare metal-free biomassderived nitrogen self-doped porous activation carbon(N-PAC) with large specific surface area(S_(BET)=1300.58 m^(2)/g).Moreover,the manufactural electrocatalysts exhibit prominent oxygen reduction reaction(ORR) performance in all PH values.As compared with the commercial Pt/C catalyst,the N-PAC/800 with a positive onset potential at 10 mA/cm^(2)(0.93 V),half-wave potential(0.87 V),and limiting current(6.34 mA/cm^(2)) bring to light excellent catalytic stability,selectivity,and much-enhanced methanol tolerance.Furthermore,the prepared electrocatalysts possess considerable hydrogen evolution reaction(HER) performance with a less onset potential of 0.218 V(acidic medium) and0.271 V(alkaline medium) respectively,which can show similar catalytic activity across the whole pH range.Such bifunctional electrocatalyst,with excellent electrocatalytic properties,resource-rich,low cost,and environmental-friendly,hold a promising application in energy conversion and reserve. | Yuanqing Sun Yiming Ouyang Jiaqing Luo Huihui Cao Xiang Li Jingwen Ma Jian Liu Yuanhao Wang Lin Lu | 2021 | Chinese Chemical Letters2021，32，1： | 1 |
| 7 | 6 - 18 Operation Status of On-line Ion Sources in 2012显示文摘 | FengYucheng Lu Wang Li Jinyu Zhang Wenhui Ma Hongyi Ma Baohua Wang Hui Li Jiaqing Lin Shuhao Cao Yun Sha Shan W u Qi Guo Junwei Fang Xing Yang Yao Li Xixia Zhang Hengjuan Zhao Huanyu Zhang Xuezhen Sun Liangting Zhao Hongwei | 2012 | IMP & HIRFL Annual Report2012，，1： | 1 |
| 8 | Electrospinning of Neat Graphene Nanofbers显示文摘Macroscopic assembly of graphene sheets has renovated the preparation of neat carbonaceous fbers with integrating high performance and superior functionalities,beyond the pyrolysis of conventional polymeric precursors.To date,graphene microfbers by the liquid crystalline wet-spinning method have been established.However,how to reliably prepare continuous neat graphene nanofbers remains unknown.Here,we present the electrospinning of neat graphene nanofbers enabled by modulating colossally extensional fow state of graphene oxide liquid crystals.We use polymer with mega molecular weight as transient additives to realize the colossal extensional fow and electrospinning.The neat graphene nanofbers feature high electronic quality and crystallinity and exhibit high electrical conductivity of 2.02×10^(6) S/m that is to be comparable with single crystal graphite whisker.The electrospinning of graphene nanofbers was extended to prepare large-area fabric with high fexibility and superior specifc electrical/thermal conductivities.The electrospinning of graphene nanofbers opens the door to nanofbers of rich two-dimensional sheets and the neat graphene nanofbers may grow to be a new species after conventional carbonaceous nanofbers and whiskers in broad functional applications. | Zhanpo Han Jiaqing Wang Senping Liu Qinghua Zhang Yingjun Liu Yeqiang Tan Shiyu Luo Fan Guo Jingyu Ma Peng Li Xin Ming Chao Gao Zhen Xu | 2022 | Advanced Fiber Materials2022，4，2： | 1 |
| 9 | Potential application of graphene nanoplatelets as a high temperature lubricant for hot rolling显示文摘Graphene has been shown to be a promising solid lubricant to reduce friction and wear of the sliding counterparts,and currently is reported to only function below 600℃.In this study,its potential as a lubricant above 600℃ was studied using a ball-on-disc tribo-meter and a rolling mill.Friction results suggest that a reduction up to 50%can be obtained with graphene nanoplatelets(GnP)under lubricated conditions between 600 and 700℃ when compared with dry tests.and this friction reduction can last more than 3 min.At 800 and 900℃,the friction reduction is stable for 70 and 40 s,respectively,which indicates that GnP can potentially provide an effective lubrication for hot metal forming processes.Hot rolling experiments on steel strips indicate that GnP reduces the rolling force by 11%,7.4%,and 6.9%at 795,890,and 960℃,respectively.These friction reductions are attributed to the easily sheared GnP between the rubbing interfaces.A temperature higher than 600℃ will lead to the gasification of the residual graphene on the strip surface,which is believed to reduce the black contamination from traditional graphite lubricant. | Long WANG Anh Kiet TIEU Ming MA Jiaqing LI Guojuan HAI Hongtao ZHU | 2022 | Friction2022，10，11： | 0 |
| 10 | Influence of nitrogen-alloying on the tempering properties of the martensitic stainless steel 00Cr13Ni4Mo显示文摘The mechanical and corrosive properties of 00Cr13Ni4Mo(S13-4N) were tested and compared with those of 00Cr13Ni6Mo(S13-6).The effects of nitrogen on the properties of the steels were analyzed.The results of the tensile and corrosion tests show the strength,the ductility,and the pitting corrosion resistance of S13-4N are higher,lower and poorer than those of S13-6 respectively,when tempered at a temperature below 550℃and vice versa when the tempering temperature is higher than 550℃.The results of the X-ray diffraction(XRD) and the electron backscattered diffraction (EBSD) analyses reveal that inversed austenite appears at 550℃and the amount of it peaks at 600℃with the best ductility.And the total amount of the inversed austenite in S13-6 is more than that in S13-4N in different forms. Nitrogen performs better in terms of stabilizing inversed austenite while nickel is more favorable for forming inversed austenite,the amount and stability of which affect the ductility remarkably.The reason for the embrittlement of S13-4N at 450℃can be the result of carbide and nitride precipitating at grain boundaries. | MA Yongzhu QIN Bin CHEN Xu GU Jiaqing | 2010 | Baosteel Technical Research2010，4，1： | 0 |
| 11 | Comparison of mini-probe endoscopic ultrasonography with computed tomography scan in preoperative staging of esophageal cancer显示文摘Objective:To compare mini-probe endoscopic ultrasonography(MCUS)with computed tomography(CT)in pre-operative T and N staging of esophageal cancer,and to find out the MCUS parameters to judge lymph nodes metastasis for esophageal cancer.Methods:Thirty-five patients received both MCUS and CT preoperatively,on both of which the T and N stages were determined.The accuracy,sensitivity,specificity,positive predicting value and negative predicting value were compared with the postoperative pathological results.Results:The accuracy of MCUS was 85.7% in T staging and 85.7% and 80.0% in N staging by two different methods,which were 45.7% and 74.3%,respectively,by CT.Conclusion:MCUS is better than CT in preoperative staging for esophageal cancer.The ratio of short to long axis(S/L)combined with short axis is a useful way to determine lymph nodes metastasis. | Hong Hu Jiaqing Xiang Yawei Zhang Jie Chen Yajia Gu Longsheng Miao Longfei Ma | 2006 | The Chinese-German Journal of Clinical Oncology2006，5，6： | 0 |
| 12 | Management of esophageal mucosa with high-grade dysplasia显示文摘Objective:Early detection and treatment in patients with esophageal cancer is the most effective way to improve the prognosis. Patients with high-grade dysplasia(HGD) in esophageal mucosa might be involved with early esophageal cancer,but the management of the disease is controversial. The purpose of our study was to explore the management of esophageal mucosa with HGD. Methods:We retrospectively analyzed 10 patients with HGD in esophageal mucosa,who underwent esophagectomy in Cancer Hospital of Fudan University from 1999 to 2006. The surgical approach,postoperative morbidity,in-hospital complications and pathological results of the patients were analyzed. Basing on our data together with other studies,we aimed at looking for an appropriate management for patients with HGD. Results:Of the 10 patients who received esophagectomy,the pathological results showed that 2(20%) cases were in situ carcinoma and 8(80%) cases were invasive cancer with no regional lymph nodes involved. 30-day mortality was 0. One patient experienced cervical anastomotic leakage,but healed in 2 weeks. There was no pulmonary complication. Conclusion:Most patients with HGD actually have occult carcinoma. High percentage of patients with HGD would develop into cancer during their lifetime. Esophagectomy is now a selective approach for the treatment of the patients with HGD. | Jiaqing Xiang,Hecheng Li,Shilei Liu,Yawei Zhang,Hong Hu,Longfei Ma,Longsheng Miao Department of Thoracic Surgery,Cancer Hospital of Fudan University Department of Oncology,Shanghai Medical College,Fudan University,Shanghai 200032,China | 2008 | The Chinese-German Journal of Clinical Oncology2008，7，3： | 0 |
| 13 | Path of Promoting Industrial Transformation and Upgrading Based on Rural Revitalization:A Case Study of Green Plum Industry in Luhe County of Shanwei City显示文摘Taking green plum Industry in Luhe County of Shanwei City in Guangdong Province as an example,this paper made a precise positioning,based on the characteristics of rural tourism resources in Yongchuan Township,took the current situation as the guide and improving the tourism function as the carrier,made an innovation of the rural tourism industry system,in order to improve the quality of rural tourism development,and realize the strategic goal of rural revitalization. | Jiaqing ZHANG Peiling MA Qian JIANG | 2022 | Asian Agricultural Research2022，14，8： | 0 |
| 14 | 离子源室2018年工作总结显示文摘Ion sources have fundamental impacts to the operation status of existing facilities and research progress of those under construction.In 2018,totally 6825.5 h beam time has been made by the ion sources for HIRFL operation,contributed by superconducting ECR ion source SECRAL/SECRAL-II with 2231 h and room temperature ECR ion source LECR3 with 4594.5 h respectively.Totally 19 beams of different ions or energies have been delivered to the downstream accelerators for diverse experiments covering the research fields of nuclear physics,material irradiation,medical application and so on.Highlights of the on-line ion source operation are the successful production of stable 7Li3+and 181Ta31+ion beams for HIRFL,and the on-line operation of SECRAL-II by replacing the former injector ion source SECRAL(Fig.1). | Sun Liangting Guo Junwei Zhao Huanyu Feng Yucheng Qian Cheng Zhang Wenhui Yang Yao Wu Qi Ma Hongyi Cao Yun Li Jiaqing Lu Wang Zhang Xuezhen Zhao Hongwei | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 15 | LEAF项目建设状态报告显示文摘LEAF or the Low Energy heavy ion Accelerator Facility is a multidiscipline heavy ion research platform under construction at IMP.It is a 5 year National Major Instruments Research Program supported by National Science Foundation of China(NSFC)started in 2015.Oriented to the frontier research in Material Sciences,Astrophysics,Atomic Physics and Highly Charged Ion Physics,LEAF has been designed and constructed with the state of the art technologies for low energy heavy ion acceleration.This facility features a 45 GHz ECR ion source FECR,a heavy ion CW 4-vane radio frequency quadruple accelerator LRFQ,300 kV HV platform,LEBT,MEBT and several dedicated experimental terminals. | Sun Liangting Yang Yao Lu Liang Guo Yuhui Liu Xiaojun Jing Long Li Libin Sun Liepeng Gao Zheng Ma Hongyi Jin Xiaofeng Zhai Yuhan Xu Xianbo Shi Longbo Xing Chaochao Liu Yuting Zhu Tieming Hu Qiang Zhang Peng Zhang Xuezhen Fang Xing Jia Huan Zhang Bin Liu Chaodong Ma Yingming Zhao Bo Wu Beimin Zhu Li Li Jiaqing Lu Wang Guo Junwei Li Chenxing Wang Zhijun Dou Weiping Wu Junxia Zhang Zimin Yao Qinggao Wu Wei Zhou Zhongzu Zhang Junhui Ma Lizhen He Yuan Zhao Hongwei | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 16 | 2018年在线离子源运行报告显示文摘HIRFL accelerator facility has been operated with two ion sources as its pre-injectors,which are LECR3 and SECRAL-II.In 2018,there were 19 kinds of ion beams delivered successfully,and the service time of the two sources are 4594.5 and 2231 h respectively,amounting to 6825.5 h in total,in which SECRAL and LECR3 provided 4 and 1 kinds of metallic ion beams respectively,and the total service time for the metallic ones is 2322 h,accounting for 34%of the total service time.Table 1 summarizes the main information about the ion beams delivered by the two ion sources. | Feng Yucheng Zhang Wenhui Ma Hongyi Fang Xing Guo Junwei Huang Wei Jia Zehua Jin Qianyu Li Jiaqing Li Jibo Li Libin Li Lixuan Lu Yuting Qian Cheng Shen Zhen Wang Guicai Wang Hui Yang Yao Zhai Yuhan Zhang Junjie Zhang Sheng Zhang Xuezhen Sun Liangting | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 17 | 2018年LAPECR3离子源在HIMM工程中的运行状态显示文摘LAPECR3(Lanzhou All Permanent Electron Cyclotron Resonance ion source no.3)had been developed as the ion injector of Heavy Ion Medical Machine(HIMM)accelerator facility since 2009 year[1].LAPECR3 features a compact structure,small size,and low cost.The ion source was designed to produce more than 100 eA C5+ion beam for long term stable operation.The first HIMM accelerator facility was built in Wuwei city.Since the HIMM accelerator facility delivered C6+ion beam successfully in December 2015,many equipment tests and beam optimization had been carried out in the past three years for Medical Treatment License.The main task of LAPECR3 ion source is routine operation for HIMM.The layout of the ion sources at the injection platform is shown in Fig.1. | Li Jiaqing Cao Yun Guo Junwei Liu Wenzhou Jin Gang Guo Xupeng Li Cong Ma Junjie Wang Hui Zhang Xuezhen Sun Liangting | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 18 | Summary of Ion Source Group Work in 2019显示文摘Ion Source Group are taking the responsibilities of ion source development,routine operation,ion beam platform commissioning and ion beam application research. | Sun Liangting Lu Wang Guo Junwei Zhao Huanyu Feng Yucheng Qian Cheng Zhang Wenhui Yang Yao Wu Qi Ma Hongyi Cao Yun Li Jiaqing Zhang Xuezhen Zhao Hongwei | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 19 | Operational Report of On-line Ion Sources in 2019显示文摘In 2019,the service time of the two on-line ion sources,LECR3 and SECRAL,is 3642.5 and 3617 h respectively,amounting to 7259.5 h.There are 19 kinds of ion beams delivered to the accelerator successfully. | Feng Yucheng Zhang Wenhui Ma Hongyi Ma Jindou Fang Xing Guo Junwei Jia Zehua Jin Qianyu Li Jiaqing Li Jibo Li Libin Li Lixuan Lu Yuting Qian Cheng Shen Zhen Wang Guicai Wang Hui Yang Yao Zhai Yuhan Zhang Junjie Zhang Xuezhen Sun Liangting | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 20 | R&D Results of LAPECR3 Ion Source in 2019显示文摘LAPECR3(Lanzhou All Permanent Electron Cyclotron Resonance ion source No.3)had been developed as the ion injector of Heavy Ion Medical Machine(HIMM)accelerator facility since 2009[1]. | Li Jiaqing Cao Yun Zhang Xuezhen Guo Junwei Fang Xing Liu Wenzhou Jin Gang Guo Xupeng Li Cong Ma Junjie Wang Hui Lu Wang Zhao Huanyu Sun Liangting | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
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