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| 1 | Towards 6G wireless communication networks:vision,enabling technologies,and new paradigm shifts显示文摘The fifth generation(5G)wireless communication networks are being deployed worldwide from 2020 and more capabilities are in the process of being standardized,such as mass connectivity,ultra-reliability,and guaranteed low latency.However,5G will not meet all requirements of the future in 2030 and beyond,and sixth generation(6G)wireless communication networks are expected to provide global coverage,enhanced spectral/energy/cost efficiency,better intelligence level and security,etc.To meet these requirements,6G networks will rely on new enabling technologies,i.e.,air interface and transmission technologies and novel network architecture,such as waveform design,multiple access,channel coding schemes,multi-antenna technologies,network slicing,cell-free architecture,and cloud/fog/edge computing.Our vision on 6G is that it will have four new paradigm shifts.First,to satisfy the requirement of global coverage,6G will not be limited to terrestrial communication networks,which will need to be complemented with non-terrestrial networks such as satellite and unmanned aerial vehicle(UAV)communication networks,thus achieving a space-airground-sea integrated communication network.Second,all spectra will be fully explored to further increase data rates and connection density,including the sub-6GHz,millimeter wave(mmWave),terahertz(THz),and optical frequency bands.Third,facing the big datasets generated by the use of extremely heterogeneous networks,diverse communication scenarios,large numbers of antennas,wide bandwidths,and new service requirements,6G networks will enable a new range of smart applications with the aid of artificial intelligence(AI)and big data technologies.Fourth,network security will have to be strengthened when developing 6G networks.This article provides a comprehensive survey of recent advances and future trends in these four aspects.Clearly,6G with additional technical requirements beyond those of 5G will enable faster and further communications to the extent that the boundary between physical and cyber worlds disappears. | Xiaohu YOU Cheng-Xiang WANG Jie HUANG Xiqi GAO Zaichen ZHANG Mao WANG Yongming HUANG Chuan ZHANG Yanxiang JIANG Jiaheng WANG Min ZHU Bin SHENG Dongming WANG Zhiwen PAN Pengcheng ZHU Yang YANG Zening LIU Ping ZHANG Xiaofeng TAO Shaoqian LI Zhi CHEN Xinying MA Chih-Lin I Shuangfeng HAN Ke LI Chengkang PAN Zhimin ZHENG Lajos HANZO Xuemin(Sherman)SHEN Yingjie Jay GUO Zhiguo DING Harald HAAS Wen TONG Peiying ZHU Ganghua YANG Jun WANG Erik GLARSSON Hien Quoc NGO Wei HONG Haiming WANG Debin HOU Jixin CHEN Zhe CHEN Zhangcheng HAO Geoffrey Ye LI Rahim TAFAZOLLI Yue GAO HVincent POOR Gerhard P.FETTWEIS Ying-Chang LIANG | 2021 | Science China(Information Sciences)2021，64，1： | 122 |
| 2 | Effect of Laser Welding Process Parameters on Microstructure and Mechanical Properties on Butt Joint of New Hot-Rolled Nano-scale Precipitation-Strengthened Steel显示文摘A 4 kW fiber laser was chosen to weld the new hot-rolled nano-scale precipitation-strengthened steel with a thickness of 4.5 mm. The effect of laser power, defocusing distance, and welding speed on the welded joint appearance was examined, and the microstructure and mechanical properties on the typical butt joints were investigated. Results showed that increasing laser welding power may cause faster downward flow of molten metal to produce greater root humping. With the welding speed increasing, the average welding seam(WS) width decreased, and the average WS and heat-affected zone(HAZ) hardness increased. The microstructures of WS, fusion line, and coarse grain heat-affected zone were lath martensite, but the growth direction of the original austenite grain boundaries was significantly different. The microstructures of fine grain heat-affected zone were ferrite and martensite, and the microstructure of mixed grain heataffected zone contained ferrite, massive M/A island, and a small amount of martensite. The micro-hardness values of WS,HAZ, and base metal(BM) were 358, 302, and 265 HV, respectively. The butt joint fracture at the BM far from the WS and the welded joint tensile strength are observed to follow proportional relationship with hardness. | Min Zhang Xiaonan Wang Guangjiang Zhu Changjun Chen Jixin Hou Shunhu Zhang Hemin Jing | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，3： | 10 |
| 3 | IEEE 802.11aj(45GHz):A New Very High Throughput Millimeter-Wave WLAN System显示文摘This paper presents an overview of a new very high throughput millimeterwave WLAN system operating at 45 GHz band. We begin by reviewing standards process of IEEE 802.11aj(45GHz). Then the frequency spectrum allocation at 45 GHz band is introduced. Next, the channel measurement and mod-eling is given. Specifically, the millimeter-wave MIMO for physical layer enhancement is given in detail. | WANG Haiming HONG Wei CHEN Jixin SUN Bo PENG Xiaoming | 2014 | China Communications2014，11，6： | 10 |
| 4 | Molecular Cytogenetic Characterization of a Wheat-Leymus mollis 3D(3Ns) Substitution Line with Resistance to Leaf Rust显示文摘Leymus mollis(Trin.)Pilger(NsNsXmXm,2n?28),a wild relative of common wheat,possesses many potentially valuable traits that could be transferred to common wheat during breeding programs.In this study,the karyotypic constitution of a wheat e L.mollis 3D(3Ns#1)disomic substitution line isolated from the F5progeny of octoploid Tritileymus M842-16 Triticum durum cv.D4286,which was designated as 10DM57,was determined using genomic in situ hybridization(GISH),fluorescent in situ hybridization(FISH),SSR markers,and ESTSTS markers.Screening of mitosis and meiosis showed that 10DM57 had a chromosome karyotype of 2n?42?21II.GISH indicated that10DM57 was a line with 40 chromosomes from wheat and two of the Ns chromosomes from L.mollis,which formed a ring bivalent in pollen mother cells at metaphase I.FISH analysis showed that the chromosome 3D may be replaced by 3Ns#1 in 10DM57.DNA markers,including SSR and EST-STS primers,showed that the pair of wheat chromosome 3D in 10DM57 was substituted by the pair of chromosome 3Ns#1from L.mollis.Evaluation of the agronomic traits showed that,compared with its common wheat relative 7182,10DM57 was resistant to leaf rust while the spike length and number of spikes per plant were improved significantly,which correlated with a higher wheat yield.The new germplasm,10DM57,could be exploited as an intermediate material in wheat genetic and breeding programs. | Yuhui Pang Xinhong Chen Jixin Zhao Wanli Du Xueni Cheng Jun Wu Yanli Li Liangming Wang Jing Wang Qunhui Yang | 2014 | Journal of Genetics and Genomics2014，41，4： | 6 |
| 5 | In-situ Synthesis of Ti_3AlC2/TiC-Al_2O_3 Composite from TiO_2-Al-C System显示文摘Ti_3AlC_2/TiC-Al_2O_3 合成被一个燃烧反应 inTiO_2-AI-C 系统综合。在产品上的原料的作文的效果是 investigated.Ti_3AlC_2/TiC-Al_2O_3 合成在 TiO_2 的臼齿的比率被获得: AI : 为 3TiO_2-5AI-2C 系统的 C=3.0:5.0~5.1:1.8~2.0.The 反应路径被建议。AI_3Ti, Ti_2O_3, TiO,和 delta-AI_2O_3are 发现了是过渡阶段。最后,在 ~ 的 Ti_3AlC_2/TiC-Al_2O_3 合成形式 900 deg Cof 炉子温度。从 3TiO_2-5AI-2C 的将近稠密的样品的测量 Vickers 坚硬,破裂坚韧,和曲折力量是 13.3+-1.1 GPa, 5.8+-0.3 MPa 中心点 m^(1/2 ) , and466 ± 3 9 MPa 分别地。 | Jixin CHEN Jialin LI Yanchun ZHOU | 2006 | Journal of Materials Science & Technology2006，22，4： | 6 |
| 6 | Electrodeposition and Characterization of Ni/Ti_3Si(Al)C_2 Composite Coatings显示文摘Pure nickel and Ni/Ti3Si(Al)C2 composite coatings were prepared by electrodeposition method from an additive-free nickel Watt's bath and were characterized by X-ray diffraction, laser confocal microscopy and scanning electron microscopy. The e?ect of current and Ti3Si(Al)C2 concentration in the solution on the composition, grain size, preferred orientation and surface morphology of the electrodeposited coatings were investigated. (200)-oriented Ni coatings could be deposited at high current (62.5 mA), while (220)-oriented Ni coatings could be obtained at low current (25 mA). However, the presence of Ti3Si(Al)C2 particles disturbed the surface texture of Ni crystallites in the composite coatings. Based on the simulated morphology and the observed microstructure, the mechanisms for the change of preferred orientation and crystallite shapes in the presence of Ti3Si(Al)C2 particles were discussed. Moreover, microhardness and friction properties of pure nickel and Ni/Ti3Si(Al)C2 composite coatings were also compared. | Ying Liang Mingyue Liu Jixin Chen Xiaoxia Liu Yanchun Zhou | 2011 | Journal of Materials Science & Technology2011，27，11： | 2 |
| 7 | Development and identification of a dwarf wheat-Leymus mollis double substitution line with resistance to yellow rust and Fusarium head blight显示文摘Leymus mollis (Trin.) Pilger (2n = 4x = 28, NsNsXmXm,), a wild relative of common wheat, possesses many potentially valuable traits for genetic improvement of wheat, including strong, short stems, long spikes with numerous spikelets, tolerance to drought and cold stresses, and resistance to many fungal and bacterial diseases. In the present study, a wheat-L. mollis double substitution line DM96 was selected from a F6 progeny of a cross between M842-16 (an octoploid Tritileymus line) and D4286 (a Triticum durum line) using genomic in situ hybridization (GISH), simple sequence repeat (SSR) markers, and expressed sequence tagged sequence site (EST-STS) markers. Chromosome analysis at mitosis and meiosis showed that DM96 had a chromosome constitution of 2n = 42 = 21II. GISH analysis indicated that DM96 carried 38 chromosomes from wheat and two homologous pairs of Ns chromosomes from L. mollis. Fluorescent in situ hybridization (FISH) showed that chromosomes 2Ns and 3Ns from L. mollis had replaced wheat chromosomes 2D and 3D in DM96, which was confirmed by SSR and STS markers. The newly developed substitution line DM96 has shorter height, longer spikes and more kernels than its parents and showed high resistance to stripe rust and Fusarium head blight (FHB). Thus, this line is a new bridge material for the production of useful translocation lines for wheat genetic research and genetic improvement of wheat yield and disease resistance in breeding programs. | Jixin Zhao Yang Liu Xueni Cheng Yuhui Pang Jiachuang Li Zhenqi Su Jun Wu Qunhui Yang Guihua Bai Xinhong Chen | 2019 | The Crop Journal2019，7，4： | 2 |
| 8 | A Low Power,High Sensitivity SiGe HBT Static Frequency Divider up to 90 GHz for Millimeter-Wave Application显示文摘A layout and connection optimization for static frequency divider is presented. The layout optimization provides a new circle topology transistors placement and reasonable connection structure, which reduces the parasitic effectively and enables self-oscillation frequency enhancement. Besides, bandwidth enhancement techniques based on a center-tap capacitor in input balun design and inductive peaking in latch design are adopted to improve further high frequency performance with low power consumption. As a proof of concept, design of a divide-by-2 static frequency divider in 0.13 μm SiGe BiCMOS technology is reported. With single-ended input clock signal, the divider is measured to be operated from 40 to 90 GHz. Phase noise measurements of a 90 GHz input clock signal indicate ideal behavior with no measurable noise contribution from the divider. The divider followed by a buffer that can deliver more than-10 dBm output power, which is sufficient to drive succeeding stage. To the author's knowledge, the divider exhibits a competitive power dissipation and the highest FOM among silicon based frequency dividers that operating higher than 70 GHz. | Peigen Zhou Jixin Chen Pinpin Yan Debin Hou Wei Hong | 2019 | China Communications2019，16，2： | 2 |
| 9 | The structural change of Cu-Sn melt显示文摘With the high-temperature viscometer and magnetic susceptibility measurement device designed by our group,the viscosity and the magnetic susceptibility of the Cu65Sn35 melt were measured during the cooling process.An anomalous change can be found in the curves of viscosity and magnetic susceptibility at a certain temperature.The structure of the melt was studied by the high-temperature X-ray diffractometer.The anomalous change also can be found in the pair distribution function,correlation radius,and coordination number at the approximate tem-perature,which shows the microstructural change of the Cu65Sn35 melt.From the results,it was confirmed that the Cu6Sn5 compound occurs in the melt,which leads to the structural change of the melt. | HOU JiXin SUN JianJun ZHAN ChengWei TIAN XueLei CHEN XiChen | 2007 | Science China(Physics,Mechanics & Astronomy)2007，50，4： | 2 |
| 10 | Selective reduction of nitrogen oxide from exhaust of lean burn engine over in situ synthesized monolithic Cu-TS-1/cordierite 显示文摘 | Landong Li Jixin Chen Shujuan Zhang | 2004 | Catalysis Today2004，90，： | 1 |
| 11 | A high-efficiency, high harmonic rejection E-band SiGe HBT frequency tripler for high-resolution radar application显示文摘Dear editor,With the advances in silicon-based technologies,high performance, low-cost frequency-modulated continuous wave (FMCW) radar sensors enabling advanced driver-assistance convenience in vehicles have been developed extensively in recent years . | Peigen ZHOU Pinpin YAN Jixin CHEN Debin HOU Wei HONG | 2019 | Science China(Information Sciences)2019，62，6： | 1 |
| 12 | Expression profiles of the Arabidopsis WRKY gene superfamily during plant defense response显示文摘 | Jixin Dong Chunhong Chen Zhixiang Chen | 2003 | Plant Molecular Biology2003，，： | 1 |
| 13 | Using pat terned arrays of metal nanoparticles to probe plasmon enhanced luminescence of CdSe quantum dots显示文摘 | Chan Y H Chen Jixin Wark S E | 2009 | Acs Nano2009，3，7： | 1 |
| 14 | Development of millimeter-wave planar diplexers based on complementary characters of dual-mode sub- strate integrated waveguide filters with circular and elliptic cavities 显示文摘 | TANG Hongjun HONG Wei CHEN Jixin | 2007 | IEEE Trans Microw Theory Tech2007，55，4： | 1 |
| 15 | Investigation on the 773K isothermal section of Ho-Ni-Si ternary phase diagram by X-ray powder diffraction and magnetic property of Ho3NiSi2 alloy显示文摘The isothermal section of the Ho-Ni-Si system at 773 K was constructed by X-ray powder diffraction(XRD)in this work.The system contains sixteen known type structure compounds TiNiSi-type HoNiSi,BaAl4-type HoNi2Si2,CeNiSi2-type HoNiSi2,U1Co3Si5-type Ho2Ni3Si5,SmNiGe3-type HoNiSi3,Ce3 Ni6Si2-type Ho3Ni6Si2,ThMn12-type HoNi10Si2,YPd2Si-type HoNi2Si,YNi5Si3-type HoNi5Si3,YNi4Si-type HoNi4Si,Gd3NiSi2-type Ho3NiSi2,YNi6Si6-type HoNi6Si6.AlB2-type Ho2NiSi3,AlB2-type Ho3Ni2Si4,AlB2-type Ho4NiSi7,Gd3Ru4Al12-type Ho8Ni31Si11,and one unknown type structure compound Ho5Ni2Si3.At the same time,one unknown structure new phase Ho37Ni3Si60 was observed.In ternary compounds,Ho2NiSi3 and Ho4NiSi7 have the solid solution phenomena;the solid solution ranges are about Ho33.3Ni18.7-9.7Si-48.0-57.0 and Ho33.Ni-8.3-2.6Si-58.3-64.1,respectively.At the same time,quasi-binary solid solutions were detected at 773 K for Ho2Ni17,HoNi5,Ho2Ni7,HoNi3,HoNi2,HoNi,HoSi.Other binary compounds of the Ho-Ni-Si system do not show any visible solubility.The magnetic property studies show that Ho3NiSi2 compound has two successive magnetic phase transitions in a low field:a spinreorientation transition at TSR=10 K and a second order ferromagnetic(FM)-paramagnetic(PM)transition at Tc=37 K. | Xiang Chen Jixin Gong Jiaojiao Luo Wenxuan Yang Xian Qing | 2020 | Journal of Rare Earths2020，38，9： | 1 |
| 16 | Expression profiles of the Arabidopsis WRKY gene superfamily during plant defense response显示文摘 | Jixin Dong Chunhong Chen Zhixiang Chen | 2003 | Plant Molecular Biology2003，，1： | 1 |
| 17 | Development of millimeter-wave planar diplexers based on complementary characters of dual-mode substrate integrated waveguide filters with circular and elliptic cavities development of millimeter-wave planar diplexers based on complementary characters of dual-mode substrate integrated waveguide filters with circular and elliptic cavities显示文摘 | Hongjun Tang Wei Hong Jixin Chen Guoqing Luo Ke Wu | 2007 | IEEE Transactions on Microwave Theory and Techniques2007，155，4： | 1 |
| 18 | Hierarchical microstructure of a titanium alloy fabricated by electron beam selective melting显示文摘Here,a near alpha-type Ti6.5 Al2 Zr1 Mo1 V alloy has been fabricated by electron beam selective melting(EBSM).Near-equiaxed grains existed in the first few layers,whereas elongated columnar priorβgrains almost parallel to the building direction formed in the subsequent built layers.Interspacing ofβphase gradually decreased as the build height increased.Martensiteα'with twins and dislocations emerged and microhardness value reached the maximum in the top region,whereas onlyα/βphase appeared in other regions in the EBSMed sample.Multiple phase transformations can be observed with the change of peak temperatures during each thermal cycle.With a sufficient dwell time,martensiteα'in the middle and bottom regions in-situ decomposed intoα+βand coarsened by the heat conduction from the subsequent layers.Fineβprecipitates nucleated heterogeneously insideα'plates and at plate-plate interfaces during the subsequent EBSM process.Considering the phase transformation during the heating process and the cooling process,the existence time of different phases was combined with cycle heating and cooling to clarify the dynamic evolution of micro structure under complex thermal history of EBSM,favoring the fabrication of high-performance titanium alloy components. | Jixin Yang Yiqiang Chen Yongjiang Huang Zhiliang Ning Baokun Liu Chao Guo Jianfei Suna | 2020 | Journal of Materials Science & Technology2020，42，7： | 1 |
| 19 | Synthesis of titania-supported platinum catalyst:the effect of pH on morphology control and valence state during photodeposition 显示文摘 | ZHANG Fuxiang CHEN Jixin ZHANG Xiu | 2004 | Langmuir2004，20，21： | 1 |
| 20 | Expression profiles of the Arabidopsis WRKY gene superfamily during plant defense response显示文摘 | Jixin Dong Chunhong Chen Zhixiang Chen | 2003 | Plant Molecular Biology2003，，1： | 1 |
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