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| 1 | Imaging energetic electron spectrometer onboard a Chinese navigation satellite in the inclined GEO orbit显示文摘The energetic electron measurement is one of the most important issues to understand dynamics in space physics and the applications for space weather. In this study, the principle and functional components of the imaging energetic electron spectrometer(IES) onboard a Chinese navigation satellite in the inclined GEO orbit(IGSO) was introduced. The IES instrument is developed by the team in Peking University(BeiDa), thus it is named as BD-IES. Based on the pin-hole technique, the instrument can measure 50–600 keV electrons incident from 9 directions over a range of 180° in polar angle. With pulse height analysis(PHA), the spectrum can be determined for each direction. The energy and angular calibrations were performed, which show the good energy and angular characteristics of BD-IES. Monte Carlo simulations show that the anti-proton design of BDIES can effectively decrease the proton contamination on the electron measurements in the inclined GEO orbit. The primary results of BD-IES verify the successful design of this instrument. | ZOU Hong YE YuGuang ZONG QiuGang CHEN HongFei ZOU JiQing CHEN Jiang SHI WeiHong YU XiangQian ZHONG WeiYing WANG YongFu ZHOU XuZhi HAO YiXin CHEN XingRan JIA XiangHong XU Feng SHAO SiPei WANG Bo HAO XiaoYun ZHANG XiaoXin | 2018 | Science China(Technological Sciences)2018，61，12： | 5 |
| 2 | Monte Carlo simulations of the sensor head of imaging energetic electron spectrometer onboard a Chinese IGSO navigation satellite显示文摘An imaging energetic electron spectrometer built by the Peking University team(BD-IES) onboard a Chinese navigation satellite in an inclined GEO orbit has been launched successfully in September 2015, which measures the spectra of the energetic electrons with the energy range of 50–600 keV in nine directions. In this study, Monte Carlo simulations of the BD-IES sensor head were performed using Geant4 and the corresponding characteristic responses to the isotropic energetic particles were derived. The effective geometric factors were estimated using the typical electron and proton spectra in the GEO orbit and the corresponding simulated sensor head responses. It was found that the average effective geometric factors of nine directions are close to the nominal geometric factors calculated with the traditional method, but the effective geometric factor decreases as the center energy of the energy channel decreases. The BD-IES sensor head also responses to the energetic protons, but the average contamination rate of all 72 channels is about 2%, which means that the proton contamination is acceptable. The spectra of the energetic electrons measured by BD-IES are derived using the effective geometric factors of the sensor head and are comparable with the spectra measured by the magnetic electron ion spectrometer(MagEIS) instrument onboard Van Allen Probes. | ZOU Hong YE YuGuang ZONG QiuGang CHEN HongFei LUO Lin ZHOU XuZhi CHEN XingRan HAO YiXin REN Jie WANG YongFu SHI WeiHong YU XiangQian JIA XiangHong XU Feng ZHANG XiaoXin | 2019 | Science China(Technological Sciences)2019，62，7： | 3 |
| 3 | Surface Nanocrystallization of C45E4 Steel by Ultrafast Electropulsing-ultrasonic Surface Treatment显示文摘The effect of high-energy electropulsing-ultrasonic surface treatment(EUST) on the surface properties and the microstructure evolution of C45 E4 steel was investigated. Refined microstructure and reduced surface roughness were obtained owing to the surface nanocrystallization process. Compared with the ultrasonic surface treatment(UST), the impact depth of the surface strengthened layer was increased by 40% to 700 μm after EUST. The average grain size of the surface nanocrystallization layer was reduced to 30-50 nm. The surface roughness of the C45 E4 steel was reduced to 0.25 μm, and the surface microhardness was dramatically enhanced to 460 HV. The improvement of microstructure and micro-hardness at ambient temperature was likely attributed to the acceleration of atomic diffusion and the enhancement of plastic deformation ability in the surface strengthened layer under the influence of electropulsing. Due to the electropulsing-assisted ultrasonic strengthening effect, the surface nanocrystallization in this ultrafast procedure was noticeably enhanced. | 陈龙 WANG Haibo LIU Dan YE Xiaoxin 唐国翌 | 2017 | Journal of Wuhan University of Technology(Materials Science)2017，32，6： | 2 |
| 4 | Microstructure, properties and temperature evolution of electro-pulsing treated functionally graded Ti–6Al–4V alloy strip显示文摘 | Xiaoxin Ye Jie Kuang Xiaopei Li Guoyi Tang | 2014 | Journal of Alloys and Compounds2014，，： | 1 |
| 5 | Effect of recove- ring damage and improving microstructure in the titanium al- loy strip under high-energy electropulses 显示文摘 | Ye Xiaoxin Li Xiaopei Song Guolin | 2014 | J Alloys Compd2014，616，： | 1 |
| 6 | Effectiveness of ten commercial maize cultivars in inducing Egyptian broomrape germination显示文摘Egyptian broomrape(EB),Phelipanche aegyptiaca,is a devastating root parasite,causing enormous crop losses around the world.Maize has the potential to influence the growth of other plants through releasing certain allelochemicals and is able to induce germination of at least three broomrape species.To determine whether maize could be used as a trap crop for EB,10 maize cultivars were tested for their ability to induce EB germination.The results showed that maize cultivars can induce EB germination,and that germination rates in a cut-root experiment and a hydroponic experiment were consistent.Maize cvs Changcheng 799 and Zhengdan 958 induced the highest EB germination rates,while cvs Luyu 13 and Zhengyu 203 were the least effective.These four maize cultivars were further studied in a pot experiment.Rhizosphere soil,rhizosphere soil extracts,root extracts and shoot extracts from these cultivars were all able to induce EB germination,with cv.Changcheng 799 inducing the highest germination rates.Root extracts generally induced higher germination rates than shoot extracts.It is suggested that Changcheng799 could be planted as a trap crop for control of EB. | Xiaoxin YE Jinnan JIA Yongqing MA Yu AN Shuqi DONG | 2016 | Frontiers of Agricultural Science and Engineering2016，3，2： | 1 |
| 7 | Effects of Electropulsing Cutting on the Quenched and Tempered 45 Steel Rods显示文摘Electropulsing is introduced into the cutting process for quenched and tempered 45 steel, which is a novel method to improve the material machinability compared with the conventional cutting process. The effects of electropulsing on cutting performances, microstructure evolution, and surface qualities of 45 steel rods were studied. The results indicate that electropulsing is beneficial for the cutting process in 3 aspects as follows:(1) reducing the principal cutting force, surface microhardness and surface roughness of the machined sample dramatically;(2) improving the machining efficiency and prolonging the life of cutting tools;(3) decreasing the thickness of rheological layer which was usually caused by work hardening in the cutting process. The morphology and microstructure of the cutting chips showed that the length of the chips increased significantly with the increase of the current density. The advantage of electropulsing is that it can improve the plastic deformation capability as well as increase the lubricating property between the specimen and the cutting tool. | 陈龙 WANG Haibo LIU Dan YE Xiaoxin LI Xiaohui 唐国翌 | 2018 | Journal of Wuhan University of Technology(Materials Science)2018，33，1： | 1 |
| 8 | Adjustable contrast optical target device for test of acquisition of photoelectric theodolite显示文摘A new device used to detect the low contrast target acquisition of photoelectric theodolite is designed and its reliability is experimentally demonstrated.The adjustable contrast optical target device,which can simulate the sky background luminance and a low contrast target,is established.It utilizes a big integrating sphere and a small one to simulate the luminance of the background and target respectively.Importantly,by controlling the luminous flux of the two integrating spheres,the targets and background radiance can be continuously adjustable under the condition of constant color temperature.Thus,the contrast can be controlled continuously in the range of 0%-90% and its stability is better than 1%.The biggest background luminance exceeds 60 W m-2str-1 in the spectral range of 400-800 nm. | SUN XiaoXin SHEN XiangHeng WANG SuHua YE Lu | 2013 | Science China(Technological Sciences)2013，56，8： | 0 |
| 9 | Sawtooth and dune auroras simultaneously driven by waves around the plasmapause显示文摘The dune aurora,at a scale of~30 kilometers,was reported recently using ground camera.The small-scale dune aurora occurs on the duskside and exhibits a monochromatic oscillation in the auroral emission,implying fundamental energy conversions.However,whether the dune auroras correspond to atmospheric waves or are associated with magnetospheric dynamics should be determined.This paper reports a dune aurora that occurred during a storm;further,we demonstrate that it was the substructure of the sawtooth aurora that was generated by plasmapause surface waves.Conjugate observations in the magnetospheric source region suggest that the exohiss waves,which are periodically modulated by the plasmapause surface wave-excited ultralow frequency wave,might be responsible for the generation of the dune aurora.Most reported dune aurora events have occurred simultaneously with sawtooth auroras,suggesting that both are plasmapause-driven cross-scale auroral structures. | Fei He ZhongHua Yao BinBin Ni Xing Cao ShengYi Ye RuiLong Guo JinXing Li ZhiPeng Ren XinAn Yue YongLiang Zhang Yong Wei XiaoXin Zhang ZuYin Pu | 2023 | Earth and Planetary Physics2023，7，2： | 0 |
| 10 | SBC(Sanhuang Xiexin Tang combined with Baihu Tang plus Cangzhu)alleviates NAFLD by enhancing mitochondrial biogenesis and ameliorating inflammation in obese patients and mice显示文摘In the context of non-alcoholic fatty liver disease (NAFLD), characterized by dysregulated lipid metabolism in hepatocytes, the quest for safe and effective therapeutics targeting lipid metabolism has gained paramount importance. Sanhuang Xiexin Tang (SXT) and Baihu Tang (BHT) have emerged as prominent candidates for treating metabolic disorders. SXT combined with BHT plus Cangzhu (SBC) has been used clinically for Weihuochisheng obese patients. This retrospective analysis focused on assessing the anti-obesity effects of SBC in Weihuochisheng obese patients. We observed significant reductions in body weight and hepatic lipid content among obese patients following SBC treatment. To gain further insights, we investigated the effects and underlying mechanisms of SBC in HFD-fed mice. The results demonstrated that SBC treatment mitigated body weight gain and hepatic lipid accumulation in HFD-fed mice. Pharmacological network analysis suggested that SBC may affect lipid metabolism, mitochondria, inflammation, and apoptosis—a hypothesis supported by the hepatic transcriptomic analysis in HFD-fed mice treated with SBC. Notably, SBC treatment was associated with enhanced hepatic mitochondrial biogenesis and the inhibition of the c-Jun N-terminal kinase (JNK)/nuclear factor-kappa B (NF-κB) and extracellular signal-regulated kinase (ERK)/NF-κB pathways. In conclusion, SBC treatment alleviates NAFLD in both obese patients and mouse models by improving lipid metabolism, potentially through enhancing mitochondrial biogenesis. These effects, in turn, ameliorate inflammation in hepatocytes. | REN Zhitao XIAO Gemin CHEN Yixin WANG Linli XIANG Xiaoxin YANG Yi WEN Siying XIE Zhiyong LUO Wenhui LI Guowei ZHENG Wenhua QIAN Xiaoxian HAI Rihan YANG Liansheng ZHU Yanhua CAI Mengyin YE Yinong SHI Guojun CHEN Yanming | 2023 | Chinese Journal of Natural Medicines2023，21，11： | 0 |
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