期刊文献+
共找到11篇文章
< 1 >
每页显示 20 50 100
Heavy-ion and pulsed-laser single event effects in 130-nm CMOS-based thin/thick gate oxide anti-fuse PROMs 被引量:8
1
作者 Chang Cai Tian-Qi Liu +8 位作者 Xiao-Yuan Li Jie Liu Zhan-Gang Zhang chao geng Pei-Xiong Zhao Dong-Qing Li Bing Ye Qing-Gang Ji Li-Hua Mo 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第5期92-102,共11页
Single event effects of 1-T structure programmable read-only memory(PROM) devices fabricated with a 130-nm complementary metal oxide semiconductorbased thin/thick gate oxide anti-fuse process were investigated using h... Single event effects of 1-T structure programmable read-only memory(PROM) devices fabricated with a 130-nm complementary metal oxide semiconductorbased thin/thick gate oxide anti-fuse process were investigated using heavy ions and a picosecond pulsed laser. The cross sections of a single event upset(SEU) for radiationhardened PROMs were measured using a linear energy transfer(LET) ranging from 9.2 to 95.6 MeV cm^2mg^(-1).The result indicated that the LET threshold for a dynamic bit upset was ~ 9 MeV cm^2mg^(-1), which was lower than the threshold of ~ 20 MeV cm^2mg^(-1) for an address counter upset owing to the additional triple modular redundancy structure present in the latch. In addition, a slight hard error was observed in the anti-fuse structure when employing209 Bi ions with extremely high LET values(~ 91.6 MeV cm^2mg^(-1)) and large ion fluence(~ 1×10~8 ions cm^(-2)). To identify the detailed sensitive position of a SEU in PROMs, a pulsed laser with a 5-μm beam spot was used to scan the entire surface of the device.This revealed that the upset occurred in the peripheral circuits of the internal power source and I/O pairs rather than in the internal latches and buffers. This was subsequently confirmed by a ^(181)Ta experiment. Based on the experimental data and a rectangular parallelepiped model of the sensitive volume, the space error rates for the used PROMs were calculated using the CRèME-96 prediction tool. The results showed that this type of PROM was suitable for specific space applications, even in the geosynchronous orbit. 展开更多
关键词 Anti-fuse PROM Single event effects HEAVY IONS Pulsed laser Space error rate
下载PDF
Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite 被引量:7
2
作者 Tian-yang Hu Ti-chang Sun +2 位作者 Jue Kou chao geng Yong-qiang Zhao 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第11期1201-1210,共10页
The co-reduction roasting and grinding-magnetic separation of seaside titanomagnetite and blast furnace dust was investigated with and without fluorite addition at a reduction roasting temperature of 1250°C for 6... The co-reduction roasting and grinding-magnetic separation of seaside titanomagnetite and blast furnace dust was investigated with and without fluorite addition at a reduction roasting temperature of 1250°C for 60 min, a grinding fineness of-43 μm accounting for 69.02 wt% of the total, and a low-intensity magnetic field strength of 151 kA/m. The mineral composition, microstructure, and state of the roasted products were analyzed, and the concentrations of CO and CO_2 were analyzed in the co-reduction roasting. Better results were achieved with a small fluorite dosage(≤4 wt%) in the process of co-reduction. In addition, F^- was found to reduce the melting point and viscosity of the slag phase because of the high content of aluminate and silicate minerals in the blast furnace dust. The low moisture content of the blast furnace dust and calcic minerals inhibited the hydrolysis of CaF_2 and the loss of F^-. Compared with the blast furnace dust from Chengdeng, the blast furnace dusts from Jiugang and Jinxin inhibited the diffusion of F-when used as reducing agents, leading to weaker effects of fluorite. 展开更多
关键词 seaside TITANOMAGNETITE blast FURNACE dust co-reduction ROASTING FLUORITE MECHANISMS
下载PDF
Development of Inclusive Private Kindergartens in Rural Areas in the Context of "Precision" Poverty Alleviation Policy
3
作者 chao geng 《Asian Agricultural Research》 2018年第2期64-67,共4页
As a national policy of benefiting the country and the people, " precision" poverty alleviation has an important strategic position.The core of " precision" poverty alleviation is education poverty... As a national policy of benefiting the country and the people, " precision" poverty alleviation has an important strategic position.The core of " precision" poverty alleviation is education poverty alleviation. Based on the background of " precision" poverty alleviation,this study focuses on the analysis of problems of rural inclusive private kindergartens in the province,such as the shortage of rural pre-school resources,the uneven quality of teachers,and lack of financial investment. And in view of the existing problems,this paper puts forward some solutions to better promote the rural inclusive kindergarten development in the province. 展开更多
关键词 " Precision" poverty alleviation Inclusive kindergartens Rural areas
下载PDF
Review on recent advances of inorganic electrode materials for potassium-ion batteries 被引量:1
4
作者 Jian-Zhen Xiong Ze-Cheng Yang +7 位作者 Xin-Liang Guo Xi-Ying Wang chao geng Zong-Fu Sun An-Yong Xiao Quan-chao Zhuang Ya-Xin Chen Zhi-Cheng Ju 《Tungsten》 EI CSCD 2024年第1期174-195,共22页
Rechargeable potassium-ion batteries(PIBs)have great potential in the application of electrochemical energy storage devices due to the low cost,the abundant resources and the low standard reduction potential of potass... Rechargeable potassium-ion batteries(PIBs)have great potential in the application of electrochemical energy storage devices due to the low cost,the abundant resources and the low standard reduction potential of potassium.As electrode materials are the key factors to determine the electrochemical performance of devices,relevant research is being carried out to build high-performance PIBs.In recent years,significant progress has been made in the study of the design of inorganic electrode materials.Herein,we review the cathode materials(Prussian blue and its analogues,layered oxides and poly anionic compounds)and the anode materials(antimony-based,selenium-based and bismuth-based compounds).On the basis of previous work,the structural design principles for improving the performance of electrode materials are reasonably summarized.At the same time,the problems that need to be solved in the preparation of electrode materials and the direction of future research and improvement are pointed out. 展开更多
关键词 Inorganic electrode materials Potassium-ion batteries Cathode materials Anode materials
原文传递
A Case of Brucellosis Concomitant with Severe Fever with Thrombocytopenia Syndrome—Weifang City,Shandong Province,China,2023
5
作者 Qingqing Xu Cuiping Wu +7 位作者 Hui Liu chao geng Jinhui Zhang Dongri Piao Hongyan Zhao Yu Fan Guozhong Tian Hai Jiang 《China CDC weekly》 SCIE CSCD 2024年第27期677-680,共4页
Summary What is already known about this topic?Brucellosis and severe fever with thrombocytopenia syndrome(SFTS)are neglected zoonoses,attributable respectively to Brucella and the SFTS virus(SFTSV).While the incidenc... Summary What is already known about this topic?Brucellosis and severe fever with thrombocytopenia syndrome(SFTS)are neglected zoonoses,attributable respectively to Brucella and the SFTS virus(SFTSV).While the incidence of these diseases has been rising,instances of co-infection remain uncommon.What is added by this report?This represents the first documented case of a rare coinfection involving Brucella and SFTSV. 展开更多
关键词 NEGLECTED instance SHANDONG
原文传递
Accounting for Polychromatic Light in Virtual Shack-Hartmann Wavefront Sensing
6
作者 Xian YUE Yaliang YANG +3 位作者 Hao DAI Shen CHEN chao geng Yudong ZHANG 《Photonic Sensors》 SCIE EI CSCD 2023年第3期8-22,共15页
Virtual Shack-Hartmann wavefront sensing(vSHWS)has some significant advantages and is promising for aberration measurement in the field of biomedical optical imaging.The illumination sources used in vSHWS are almost b... Virtual Shack-Hartmann wavefront sensing(vSHWS)has some significant advantages and is promising for aberration measurement in the field of biomedical optical imaging.The illumination sources used in vSHWS are almost broadband,but are treated as monochromatic sources(only using center wavelength)in current data processing,which may cause errors.This work proposed a data processing method to take into account the multiple wavelengths of the broadband spectrum,named multiple-wavelength centroid-weighting method.Its feasibility was demonstrated through a series of simulations.A wavefront generated with a set of statistical human ocular aberrations was used as the target wavefront to evaluate the performance of the proposed and current methods.The results showed that their performance was very close when used for the symmetrical,but the wavefront error of the proposed method was much smaller than that of the current method when used for the asymmetrical spectrum,especially for the broader spectrum.These results were also validated by using 20 sets of clinical human ocular aberrations including normal and diseased eyes.The proposed method and the obtained conclusions have important implications for the application of vSHWS. 展开更多
关键词 Wavefront sensing aberration measurement numerical wavefront processing Shack-Hartmann wavefront sensing broadband spectral source
原文传递
Recovery of iron and copper from copper tailings by coal-based direct reduction and magnetic separation 被引量:7
7
作者 chao geng Hua-jun Wang +2 位作者 Wen-tao Hu Li Li Cheng-shuai Shi 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2017年第10期991-997,共7页
A technique comprising coal-based direct reduction followed by magnetic separation was presented to recover iron and copper from copper slag flotation tailings.Optimal process parameters,such as reductant and additive... A technique comprising coal-based direct reduction followed by magnetic separation was presented to recover iron and copper from copper slag flotation tailings.Optimal process parameters,such as reductant and additive ratios,reduction temperature,and reduction time,were experimentally determined and found to be as follows:a limestone ratio of 25%,a bitumite ratio of 30%,and reduction roasting at 1473 Kfor 90 min.Under these conditions,copper-bearing iron powders(CIP)with an iron content of 90.11% and copper content of 0.86%,indicating iron and copper recoveries of87.25% and 83.44%respectively,were effectively obtained.Scanning electron microscopy and energy dispersive spectroscopy of the CIP revealed that some tiny copper particles were embedded in metal iron and some copper formed alloy with iron,which was difficult to achieve the separation of these two metals.Thus,the copper went into magnetic products by magnetic separation.Adding copper into the steel can produce weathering steel.Therefore,the CIP can be used as an inexpensive raw material for weathering steel. 展开更多
关键词 Copper slag Coal-based direct reduction Magnetic separation Iron powder Weathering steel
原文传递
Retinoic acid ameliorates high-fat diet-induced liver steatosis through Sirt1 被引量:5
8
作者 chao geng Haifeng Xu +8 位作者 Yinliang Zhang Yong Gao Meixia Li Xiaoyan Liu Mingyue Gao Xiaojuan Wang Xiaojun Liu Fude Fang Yongsheng Chang 《Science China(Life Sciences)》 SCIE CAS CSCD 2017年第11期1234-1241,共8页
In this study, treatment of C57BL/6J (wild type, WT) mice fed a high-fat diet (HFD) with retinoic acid (RA) decreased body weight and subcutaneous and visceral fat content, reversed the apparent hepatosteatosis,... In this study, treatment of C57BL/6J (wild type, WT) mice fed a high-fat diet (HFD) with retinoic acid (RA) decreased body weight and subcutaneous and visceral fat content, reversed the apparent hepatosteatosis, and reduced hepatic intracellular triglyceride and serum alanine transaminase (ALT) and aspartate aminotransferase (AST) concentrations. Moreover, RA treatment improved glucose tolerance and insulin sensitivity in WT mice fed a HFD. However, these RA-induced effects in WT mice fed a HFD were alleviated in liver specific Sirtuin 1 (Sirtl) deficient (LKO)mice fed a HFD. Furthermore, RA also could not improve glucose tolerance and insulin sensitivity in LKO mice fed a HFD. The mechanism studies indicated that RA indeed increased the expression of hepatic S irtl and superoxide dismutase 2 (Sod2), and inhibited the expression of sterol regulatory element binding protein 1 c (Srebp- 1 c) in WT mice in vivo and in vitro. RA decreased mitochondrial reactive oxygen species (ROS) production in WT primary hepatocytes and increased mitochondrial DNA (mtDNA) copy number in WT mice liver. However, these RA-mediated molecular effects were also abolished in the liver and primary hepatocytes from LKO mice. In summary, RA protected against HFD-induced hepatosteatosis by decreasing Srebp-1 c expression and improving antioxidant capacity through a S irt 1-mediated mechanism. 展开更多
关键词 retinoic acid Sirtl non-alcoholic fatty liver disease lipid metabolism oxidative stress
原文传递
Effects of embedding direct reduction followed by magnetic separation on recovering titanium and iron of beach titanomagnetite concentrate 被引量:10
9
作者 chao geng Ti-chang Sun +2 位作者 You-wen Ma Cheng-yan Xu Hui-fen Yang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2017年第2期156-164,共9页
Embedding direct reduction followed by magnetic separation was conducted to fully recover iron and titanium separately from beach titanomagnetite (TTM). The influences of reduction conditions, such as molar ratio of... Embedding direct reduction followed by magnetic separation was conducted to fully recover iron and titanium separately from beach titanomagnetite (TTM). The influences of reduction conditions, such as molar ratio of C to Fe, reduction time, and reduction temperature, were studied. The results showed that the TTM concentrate was reduced to iron and iron-titanium oxides, depending on the reduction time, and the reduction sequence at 1 200℃ was suggested as follows : Fe2.75 Ti0.25O4→Fe2TiO4→FeTiO3→FeTi2O5. The reduction temperature played a considerable role in the reduction of TTM concentrates. Increasing temperature from 1 100 to 1 200℃ was beneficial to recovering titanium and iron, whereas the results deteriorated as temperature increased further. The results of X-ray diffraction and scanning electron microscopy analyses showed that low temperature (≤1100℃) was unfavorable for the gasification of reductant, resulting in insufficient reducing atmosphere in the reduction process. The molten phase was formed at high temperatures of 1250-1 300℃, which accelerated the migration rate of metallic particles and suppressed the diffusion of reduction gas, resulting in poor reduction. The optimum conditions for reducing TTM concentrate are as follows: molar ratio of C to Fe of 1.68, reduction time of 150 min, and reduction temperature of 1 200℃. Under these conditions, direct reduction iron powder, assaying 90.28 mass% TFe and 1.73 mass% TiO2 with iron recovery of 90.85%, and titanium concentrate, assaying 46.24 mass% TiO2 with TiO2 recovery of 91.15%, were obtained. 展开更多
关键词 Titanomagnetite concentrate Direct reduction Reduction condition Direct reduction iron powder Magnetic separation
原文传递
Effect of Sodium Sulfate on Direct Reduction of Beach Titanomagnetite for Separation of Iron and Titanium 被引量:8
10
作者 En-xia GAO Ti-chang SUN +2 位作者 Zhi-guo LIU chao geng Cheng-yan XU 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2016年第5期428-433,共6页
The effect of sodium sulfate on direct reduction of beach titanomagnetite,followed by magnetic separation,to separate iron and titanium was investigated. Direct reduced iron( DRI) with a high Fe content,low TiO_2 co... The effect of sodium sulfate on direct reduction of beach titanomagnetite,followed by magnetic separation,to separate iron and titanium was investigated. Direct reduced iron( DRI) with a high Fe content,low TiO_2 content and low iron recovery was obtained after adding sodium sulfate. When the sodium sulfate dosage was increased from 0 to 10 mass%,the Fe content of the DRI increased from 90. 00 mass% to 93. 55 mass% and the TiO_2 content decreased from 1. 27 mass% to 0. 70 mass%. The reduction mechanism of sodium sulfate was investigated by X-ray diffraction( XRD) and scanning electron microscopy( SEM) with energy dispersive spectrometer( EDS). Results revealed that the metallic iron grains in the reduced ore with sodium sulfate were larger than those in the ore without sodium sulfate. Sodium sulfate promoted the migration of iron as well as the accumulation and growth of metallic iron grains by low-melting-point carnegieite and troilite formed in the redox system. Low-melting-point carnegieite decreased the melting point of the system and then promoted liquefaction. Troilite could decrease the surface tension and melting point of metallic iron grains. 展开更多
关键词 beach titanomagnetite sodium sulfate direct reduction separation iron titanium
原文传递
Graphene Quantum Dots Open Up New Prospects for Interfacial Modifying in Graphene/Silicon Schottky Barrier Solar Cell
11
作者 chao geng Xiuhua Chen +6 位作者 Shaoyuan Li Zhao Ding Wenhui Ma Jiajia Qiu Qidi Wang Chang Yan Hua-jun Fan 《Energy Material Advances》 2021年第1期262-272,共11页
Graphene/silicon(Gr/Si)Schottky barrier solar cells(SBSCs)are attractive for harvesting solar energy and have been gaining grounds for its low-cost solution-processing.The interfacial barrier between graphene and sili... Graphene/silicon(Gr/Si)Schottky barrier solar cells(SBSCs)are attractive for harvesting solar energy and have been gaining grounds for its low-cost solution-processing.The interfacial barrier between graphene and silicon facilitates the reducing excessive carrier recombination while accelerating the separation processes of photo-generated carriers at the interface,which empowers the performance of Gr/Si SBSCs.However,the difficulty to control the interface thickness prevents its application.Here,we introduce the graphene oxide quantum dots(GOQDs)as a unique interfacial modulation species with tunable thickness by controlling the GOQDs particle size.The power conversion efficiency(PCE)of 13.67%for Gr/Si-based SBSC with outstanding stability in the air is obtained with the optimal barrier thickness(26 nm)and particle size(4.15 nm)of GOQDs.The GOQDs in Gr/Si-based SBSCs provide the extra band bending which further enhances the PCE for its photovoltaic applications. 展开更多
关键词 INTERFACIAL Solar interface
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部