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| 1 | Broadband photonic radio frequency(RF) channelization based on coherent optical frequency combs and polarization I/Q demodulation显示文摘In this work,we analyze and demonstrate a novel photonic-assisted broadband and high-resolution radio frequency(RF) channelization scheme based on dual coherent optical frequency combs(OFCs),regular optical de-muxes,and polarization I/Q demodulators in theory and experiment.The use of two coherent combs avoids precise optical alignment,and a numerical filter in digital signal processor(DSP) enables an ideal rectangular frequency response in each channel without any ultra-narrow optical filters.Besides,due to the use of polarization I/Q demodulation,ambiguous frequency estimate in direct detection can be avoided and the amplitude,phase mismatch in traditional I/Q demodulation can be mitigated.In experiment,we use two coherent OFCs with the free spectrum range(FSR) of about 40 GHz to demonstrate the channelization scheme with seven channels,500 MHz channel spacing and frequency coverage from 3.75 GHz to 7.25 GHz.The input RF tones are accurately down-converted to an intermediate frequency(IF) with a maximum frequency error of 110 kHz.Meanwhile,crosstalk and spurious free dynamic range(SFDR) of the scheme are also discussed. | DAI YiTang XU Kun XIE XiaoJun YAN Li WANG RuiXin LIN JinTong | 2013 | Chinese Science Bulletin2013，58，7： | 5 |
| 2 | Microwave photonics: radio-over-fiber links, systems, and applications [Invited]显示文摘Microwave photonics(MWPs)uses the strength of photonic techniques to generate,process,control,and distribute microwave signals,combining the advantages of microwaves and photonics.As one of the main topics of MWP,radio-over-fiber(RoF)links can provide features that are very difficult or even impossible to achieve with traditional technologies.Meanwhile,a considerable number of signal-processing subsystems have been carried out in the field of MWP as they are instrumental for the implementation of many functionalities.However,there are still several challenges in strengthening the performance of the technology to support systems and applications with more complex structures,multiple functionality,larger bandwidth,and larger processing capability.In this paper,we identify some of the notable challenges in MWP and review our recent work.Applications and future direction of research are also discussed. | Kun Xu Ruixin Wang Yitang Dai Feifei Yin Jianqiang Li Yuefeng Ji Jintong Lin | 2014 | Photonics Research2014，2，4： | 4 |
| 3 | Preface显示文摘Owing to the fast economic growing and the concern over greenhouse gases and air pollution,the development of nuclear energy is one important option to meet the expanded energy consumption in our future.To achieve that goal,continuing and reliable supplies of uranium are critical to future nuclear power projects.As is well known,global terrestrial reserves of uranium are limited and the deposits in China are relatively small.Given the projected big growth in nuclear power in the future,reliable supply of uranium at a reasonable price is essential for China. | DAI YiTang XU Kun XIE XiaoJun YAN Li WANG RuiXin LIN JinTong | 2013 | Science China Chemistry2013，56，11： | 2 |
| 4 | Effects of different aperture-sized type I collagen/silk fibroin scaffolds on the proliferation and differentiation of human dental pulp cells显示文摘This study aimed at evaluate the effects of different aperture-sized type I collagen/silk fibroin(CSF)scaffolds on the proliferation and differentiation of human dental pulp cells(HDPCs).The CSF scaffolds were designed with 3D mapping software Solidworks.Three different aperture-sized scaffolds(CSF1-CSF3)were prepared by low-temperature deposition 3D printing technology.The morphology was observed by scanning electron microscope(SEM)and optical coherence tomography.The porosity,hydrophilicity and mechanical capacity of the scaffold were detected,respectively.HDPCs(third passage,1105 cells)were seeded into each scaffold and investigated by SEM,CCK-8,alkaline phosphatase(ALP)activity and HE staining.The CSF scaffolds had porous structures with macropores and micropores.The macropore size of CSF1 to CSF3 was 421627 lm,579636 lm and 707643 lm,respectively.The porosity was 69.862.2%,80.162.8%and 86.563.3%,respectively.All these scaffolds enhanced the adhesion and proliferation of HDPCs.The ALP activity in the CSF1 group was higher than that in the CSF3 groups(P<0.01).HE staining showed HDPCs grew in multilayer within the scaffolds.CSF scaffolds significantly improved the adhesion and ALP activity of HDPCs.CSF scaffolds were promising candidates in dentine-pulp complex regeneration. | Shihui Jiang Zhaoxia Yu Lanrui Zhang Guanhua Wang Xiaohua Dai Xiaoli Lian Yan Yan Linpu Zhang Yue Wang Ruixin Li Huiru Zou | 2021 | Regenerative Biomaterials2021，8，4： | 2 |
| 5 | Dissipative Soliton in Actively Mode-Locked Fiber Laser 显示文摘 | WANG Ruixin DAI Yitang YAN Ii | 2012 | Optics Express2012，20，6： | 1 |
| 6 | Performance degradation mechanism of lithium compounds ceramic fuel cell with GDC as electrolyte显示文摘The performance degradation mechanism of ceramic fuel cell with NCAL(Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2))as symmetrical electrode and GDC as electrolyte in H2 is investigated.It is found that under the condition of 550◦C and constant current density of 0.2 A⋅cm^(-2),the output voltage of the cell is about 1.005 V in the initial 10 h and remains relatively stable.After 10 h,the voltage of the cell began to decrease gradually,and by 50 h,the voltage had decreased to 0.522 V.The results testing electrochemical performance of the cell and characterizing the cell materials before and after test using SEM,TOF-SIMS and FTIR indicate that the distribution of Li_(2)O/LiOH/Li_(2)CO_(3)compounds generated from NCAL anode in the cell plays a vital role in significantly improving the ionic conductivity of electrolyte and gas tightness of the cell.The dynamic migration of molten salt destroyed the continuity of molten salt in the cell,which in turn adversely impacted the ionic conductivity of electrolyte,gas tightness of the cell,and electrochemical reactions on both sides of the cathode and anode.These finally lead to the degradation of the cell performance. | Kai Wei Rui Zhang Gang Chen Zhuo Chen Ruixin Dai Xiaohong Lv Shujiang Geng | 2023 | Carbon Resources Conversion2023，6，3： | 0 |
| 7 | Effect of chemical reactions between electrolyte and lithium compounds on the electrochemical performance of the ceramic fuel cells显示文摘Previous studies have found that the ceramic fuel cell using Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2)(NCAL)symmetrical electrode has obtained very good power generation performance in the temperature range of 450 to 550℃.Previous studies have pointed out that after being reduced by H2,NCAL anode will produce LiOH/Li2CO3 mixture and diffuse into the electrolyte,which results in the high ionic conductivity of the cell.In this study,the chemical reactivity of different oxide electrolytes such as CeO_(2),TiO_(2),ZrO_(2)and YSZ with LiOH and/or Li2CO3 and their effects on the electrochemical performance of the cell were studied.It is found that at 550◦C,only the open circuit voltage(OCV)of the cell using CeO_(2)as electrolyte can remain stable,and the maximum power density(MPD)of the CeO_(2)electrolyte cell reaches 599.6 mW⋅cm^(−2).The OCV of the cells with TiO_(2),ZrO_(2)and YSZ as electrolyte increased to the highest value within a few minutes,and the MPD of the cells was only more than 12 mW⋅cm^(−2).XRD,FT-IR,SEM-EDS and ICP-OES results indicate that the LiOH/Li2CO3 mixture diffuses into TiO_(2),ZrO_(2)and YSZ electrolytes and reacts with three oxides to produce Li2TiO3 and Li2ZrO3,respectively,which results in the low performance of the cell. | Ruixin Dai Gang Chen Kai Wei Zhuo Chen Xiaohong Lv Guoqiang Liu Ying Li Shujiang Geng | 2022 | Carbon Resources Conversion2022，5，2： | 0 |
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