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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 | Characteristics of strike-slip inversion structures of the Karatau fault and their petroleum geological significances in the South Turgay Basin,Kazakhstan显示文摘The Karatau fault is one of the important strike-slip faults in central Asia,and the South Turgay Basin is located towards its northern end.Detailed seismic interpretation indicated that the strikeslip tectonism of the Karatau fault weakened gradually from west to east in the South Turgay Basin.Typical flower structures developed on the section,and strike-slip faults showed an echelon pattern on planar view.The Karatau strike-slip fault affected the South Turgay Basin in two periods:(1) The South Turgay strike-slip pull-apart rift basin formed as a result of regional extensive stress in the Early-Middle Jurassic,characterized by the juxtaposition of horsts and grabens.The formation of horsts provided favorable reservoir spaces for later hydrocarbon accumulation,and different filling stages of grabens controlled different reservoir-forming factors in grabens.(2) Two stages of tectonic inversion occurred in the Late Jurassic and Late Cretaceous and played a crucial role in the final shape of the structure in the South Turgay Basin.The oil and gas migrated to form reservoirs and mainly concentrated in the horsts,graben slopes and in both sides of the strike-slip fault zone.In the case of the degree of accumulation of petroleum,the factor explaining why horsts are better than grabens is the strike-slip pull-apart of the South Turgay Basin,and the structure inversion of the South Turgay Basin explains why the west graben is better than the east one.Overall,the Karatau strike-slip fault played a very important role in the formation of the South Turgay Basin and its hydrocarbon accumulations. | Yin Wei Fan Zifei Zheng Junzhang Yin Jiquan Zhang Mingjun Sheng Xiaofeng Guo Jianjun Li Qiyan Lin yaping | 2012 | Petroleum Science2012，9，4： | 11 |
| 3 | Development of a new method for analyzing free aluminum ions(Al^(3+)) in seafood using HPLC-ICP-MS显示文摘This paper presents a novel method for simultaneous online examination of free aluminum ions(Al3+)in seafood,using solidphase extraction and high-performance liquid chromatography online with inductively coupled plasma mass spectrometry(SPEHPLC-ICP-MS),without post-column reaction.The optimum conditions for chromatographic separation of Al3+were achieved using an IonPac CS5A analytical column with an IonPac CG5A guard column.The mobile phase consisted of 0.040 mol/L LiOH,0.0060 mol/L 2,6-pyridinedicarboxylic acid,and 0.090 mol/L CH3COOH(pH 4.7).The free Al3+ions in seafood were extracted by shaking with the mobile phase at 70°C for 2 h.SPE was conducted using an Oasis MCX,3cc/60 mg,30μm column,which was activated and equilibrated with 2 mL of methanol and 4 mL of deionized water before use.HCl(0.075 mol/L,2 mL)was used to wash inorganic Al from the SPE column.The standard recoveries of Al3+were all above 89%and the relative standard deviations were all below 5%.The proposed method was successfully used for the examination of Al3+in seafood samples,and the results were similar to those obtained using the static equilibrium method. | SHANG DeRong ZHAO YanFang ZHAI YuXiu NING JinSong DING HaiYan SHENG XiaoFeng | 2013 | Chinese Science Bulletin2013，58，35： | 8 |
| 4 | Ultrasound features of extranodal extension in the metastatic cervical lymph nodes of papillary thyroid cancer:a case-control study显示文摘Objective:Extranodal extension in cervical lymph nodes is an important risk factor for the progression and prognosis of papillary thyroid cancer.The purpose of this study was to identify the common and characteristic preoperative ultrasonography features that are associated with the pathologic extranodal extension of metastatic papillary thyroid carcinoma.Methods:We retrospectively assessed and compared clinicopathologic and ultrasound features between 60 papillary thyroid cancer patients with extranodal extension and 120 control patients with papillary thyroid cancer without extranodal extension.Results:With respect to the pathological N stage and clinicopathologic features,N1b stage papillary thyroid carcinomas were more frequently found in patients who were extranodal extension-positive,in comparison with those who were extranodal extension-negative(78.3%vs.63.3%,P=0.043).Extranodal extension was detected most frequently in level VI cervical lymph nodes(48.7%).In our univariate analysis of patients with papillary thyroid carcinoma,cervical lymph nodes with extranodal extension showed higher incidences of node matting,microcalcification,cystic area,aspect ratio<2,and larger diameter than those without extranodal extension(all P<0.05).Our multivariate analysis demonstrated that node matting and cystic area were independent risk factors for the presence of extranodal extension[odds ratio(OR):4.751,95%confidence interval(CI):1.212~18.626,P=0.025;OR:2.707,95%CI:1.127~6.502,P=0.026].Conclusions:Common ultrasound features may indicate the presence of extranodal extension in patients with metastatic cervical lymph nodes of papillary thyroid carcinoma. | Jiali Mu Xiaofeng Liang Fangxuan Li Juntian Liu Sheng Zhang Jing Tian | 2018 | Cancer Biology & Medicine2018，15，2： | 7 |
| 5 | Tensile, creep behavior and microstructure evolution of an as-cast Ni-based K417G polycrystalline superalloy显示文摘The Ni-based K417 G superalloy is extensively applied as aeroengine components for its low cost and good mid-temperature(600–900?C) properties. Since used in as-cast state, the comprehensive understanding on its mechanical properties and microstructure evolution is necessary. In the present research,the tensile, creep behavior and microstructure evolution of the as-cast K417 G superalloy under different conditions were investigated. The results exhibit that tensile cracks tend to initiate at MC carbide and γ/γ' eutectic structure and then propagate along grain boundary. As the temperature for tensile tests increases from 21?C to 700?C, the yield strength and ultimate tensile strength of K417 G superalloy decreases slightly, while the elongation to failure decreases greatly because of the intermediate temperature embrittlement. When the temperature rises to 900?C, the yield strength and ultimate tensile strength would decrease significantly. The creep deformation mechanism varies under different testing conditions. At 760?C/645 MPa, the creep cracks initiate at MC carbides and γ/γ' eutectic structures,and propagate transgranularly. While at 900?C/315 MPa and 950?C/235 MPa, the creep cracks initiate at grain boundary and propagate intergranularly. As the creep condition changes from 760?C/645 MPa to 900?C/315 MPa and 950?C/235 MPa, the ? phase starts to raft, which reduces the creep deformation resistance and increases the steady-state deformation rate. | Beining Du Ziyang Hu Liyuan Sheng Chuanyong Cui Jinxia Yang Yufeng Zheng Xiaofeng Sun | 2018 | Journal of Materials Science & Technology2018，34，10： | 4 |
| 6 | Precipitation Behaviors in the Diffusion Affected Zone of TLP Bonded Single Crystal Superalloy Joint显示文摘The single crystal superalloys were joined by transient liquid phase(TLP) bonding. The precipitating behavior in the diffusion affected zone(DAZ) was studied and the hardness across the DAZ was analyzed. Results have shown that there existed M3B2,M5B3 and M23B6 borides in the DAZ. With increasing bonding time,fine M3B2 precipitates formed first near the isothermal solidification zone(ISZ)/matrix interface. Then,the dendritic M5B3 precipitates formed with an obvious orientation relationship with the substrate. The acicular precipitates were constituted by M23B6 and M5B3 phases with continuous or discontinuous morphologies. The hardness of the DAZ reached a summit in the fine M3B2 region and decreased with the increase of the distance away from the ISZ/matrix interface. | Naicheng Sheng Jide Liu Tao Jin Xiaofeng Sun Zhuangqi Hu | 2015 | Journal of Materials Science & Technology2015，31，2： | 4 |
| 7 | Estimation of tropical cyclone parameters and wind fields from SAR images显示文摘The traditional method of Synthetic Aperture Radar(SAR)wind field retrieval is based on an empirical relation between the near surface winds and the normalized radar backscatter cross section to estimate wind speeds,where this relation is called the geophysical model function(GMF).However,the accuracy rapidly decreases due to the impact of rainfall on the measurement of SAR and the saturation of backscattered intensity under the condition of tropical cyclone.Because of no available instrument synchronously monitoring rain rate on the satellite platform of SAR,we have to derive the precipitation of the SAR observation time from non-simultaneous passive microwave observations of rain in combination with geostationary IR images,and then use the model of rain correction to remove the impact of rain on SAR wind field measurements.For the saturation of radar backscatter cross section in high wind speed conditions,we develop an approach to estimate tropical cyclone parameters and wind fields based on the improved Holland model and the SAR image features of tropical cyclone.To retrieve the low-to-moderate wind speed,the wind direction of tropical cyclone is estimated from the SAR image using wavelet analysis.And then the maximum wind speed and the central pressure of tropical cyclone are calculated by a least square minimization of the difference between the improved Holland model and the low-to-moderate wind speed retrieved from SAR.In addition,wind fields are estimated from the improved Holland model using the above-mentioned parameters of tropical cyclone as input.To evaluate the accuracy of our approach,the SAR images of typhoon Aere,typhoon Khanun,and hurricane Ophelia are used to estimate tropical cyclone parameters and wind fields,which are compared with the best track data and reanalyzed wind fields of the Joint Typhoon Warning Center(JTWC)and the Hurricane Research Division(HRD).The results indicate that the tropical cyclone center,maximum wind speed,and central pressure are generally consistent with the best track data,and wind fields agree well with reanalyzed data from HRD. | ZHOU Xuan YANG XiaoFeng LI ZiWei YU Yang BI HaiBo MA Sheng LI XiaoFeng | 2013 | Science China Earth Sciences2013，56，11： | 4 |
| 8 | Influence of the Substrate Orientation on the Isothermal Solidification during TLP Bonding Single Crystal Superalloys显示文摘Angle deviations between the two substrates during transient liquid phase(TLP) bonding single crystal superalloys cannot be avoided. In the present work, specimens have been prepared to investigate the influences of the various substrate orientations. It is found that the width of the non-isothermal solidification zone(NSZ) is linear with the square root of the isothermal solidification time. This suggests that the isothermal solidification process is B-diffusion controlled in different substrate orientation deviations. And also the width of the NSZ increases with increasing angle deviation, indicating that the isothermal solidification time needed in the TLP bonding increases with increasing orientation deviation between the two substrates. | Naicheng Sheng Bo Li Jide Liu Tao Jin Xiaofeng Sun Zhuangqi Hu | 2014 | Journal of Materials Science & Technology2014，30，3： | 3 |
| 9 | Landing site topographic mapping and rover localization for Chang’e-4 mission显示文摘This paper presents the techniques and results of landing-site topographic mapping and rover localization using orbital,descent and rover images in the Chang’e-4 mission.High-resolution maps of the landing site are generated from orbital and descent images.Local digital elevation models and digital orthophoto maps with 0.02 m resolution are generated at each waypoint.The location of the lander is determined as(177.588?E,45.457?S)using festure-matching techniques.The cross-site visual localization method is routinely used to localize the rover at each waypoint to reduce error accumulation from wheel slippage and IMU drift in dead reckoning.After the first five lunar days,the rover travels 186.66 m from the lander,according to the cross-site visual localization.The developed methods and results have been directly utilized to support the mission’s operations.The maps and localization information are also valuable for supporting multiple scientific explorations of the landing site. | Zhaoqin LIU Kaichang DI Jian LI Jianfeng XIE Xiaofeng CUI Luhua XI Wenhui WAN Man PENG Bin LIU Yexin WANG Sheng GOU Zongyu YUE Tianyi YU Lichun LI Jia WANG Chuankai LIU Xin XIN Mengna JIA Zheng BO Jia LIU Runzhi WANG Shengli NIU Kuan ZHANG Yi YOU Bing LIU Jiangang LIU | 2020 | Science China(Information Sciences)2020，63，4： | 3 |
| 10 | M5B3 Boride at the Grain Boundary of a Nickel-based Superalloy显示文摘The grain boundary microstructures of a heat-treated Ni-based cast superalloy IN792 were investigated. The results show that M_5B_3 boride precipitates at the grain boundary. A special orientation relationship between M_5B_3 phase and the matrix at one side of the grain boundary is found. At the same time, two M_5B_3 borides with different orientations could co-exist in a single M_5B_3 particle as an intergrowth besides existing alone, thus forming orientation relationship between the two M_5B_3 phases and matrix. This phenomenon could be attributed to the special orientation relationship between M_5B_3 phase and the matrix. | Beining Du Zhiwu Shi Jinxia Yang Zhaokuang Chu Chuanyong Cui Xiaofeng Sun Liyuan Sheng Yufeng Zheng | 2016 | Journal of Materials Science & Technology2016，32，3： | 2 |
| 11 | Pollution of hazardous substances in industrial construction and demolition wastes and their multi-path risk within an abandoned pesticide manufacturing plant显示文摘 | Sheng Huang Xin Zhao Yanqiu Sun Jianli Ma Xiaofeng Gao Tian Xie Dongsheng XU Yi Yu Youcai Zhao | 2017 | Frontiers of Environmental Science & Engineering2017，11，1： | 2 |
| 12 | A New Wave of Hormone Research: Crosstalk Mechanisms显示文摘Phytohormones regulate numerous aspects of plant growth,development,and responses to biotic and abiotic stress conditions.At least seven groups of phytohormones have been well characterized,including abscisic acid (ABA),auxin,brassinosteroid (BR),cytokinin (CK),ethylene,gibberellin (GA),and jasmonate (JA).Hormone research in the past decades has focused on elucidating signal transduction pathways from hormone perception to response and such effort has been well paid off by recent discoveries of almost all receptors for major classes of plant hormones.While receptors and pathways for individual hormones are being illustrated,mounting evidence suggests that these signaling pathways are interconnected in a complex network,in which phytohormones not only orchestrate intrinsic developmental cues,but also convey environmental inputs by means of synergistic or antagonistic actions referred to as signaling crosstalk.In this context,Molecular Plant published a special issue focusing on hormone action and crosstalk (Volume 4,Number 4,2011),which has had free access online since July 2012. | Xiaofeng Cui Sheng Luan | 2012 | Molecular Plant2012，5，5： | 2 |
| 13 | Modified projection approach for robust adaptive array beamforming 显示文摘 | Fei Huang Sheng Weixing Ma Xiaofeng | 2012 | Signal Pro- cessing2012，，92： | 1 |
| 14 | NANOIMPRINT LITHOGRAPHY TECHNOLOGY WITH AUTOMATIC ALIGNMENT显示文摘Nanoimprint lithography (NIL) is recognized as one of the most promising candidates for the next generation lithography (NGL) to obtain sub-100 nm patterns because of its simplicity, high-throughput and low-cost. While substantial effort has been expending on NIL for producing smaller and smaller feature sizes, considerably less effort has been devoted to the equally important issue—alignment between template and substrate. A homemade prototype nanoimprint lithography tool with a high precision automatic alignment system based on Moiré signals is presented. Coarse and fine pitch gratings are adopted to produce Moiré signals to control macro and micro actuators and enable the substrate to move towards the desired position automatically. Linear motors with 300 mm travel range and 1 μm step resolution are used as macro actuators, and piezoelectric translators with 50 μm travel range and 1 nm step resolution are used as micro actuators. In addition, the prototype provides one translation (z displacement) and two tilting motion(α and β ) to automatically bring uniform intact contact between the template and substrate surfaces by using a flexure stage. As a result, 10 μm coarse alignment accuracy and 20 nm fine alignment accuracy can be achieved. Finally, some results of nanostructures and micro devices such as nanoscale trenches and holes, gratings and microlens array fabricated using the prototype tool are presented, and hot embossing lithography, one typical NIL technology, are depicted by taking nanoscale gratings fabrication as an example. | FAN Xiqiu ZHANG Honghai HU Xiaofeng JIA Ke LIU Sheng | 2007 | Chinese Journal of Mechanical Engineering2007，20，3： | 1 |
| 15 | The Solar Upper Transition Region Imager(SUTRI)Onboard the SATech-01 Satellite显示文摘The Solar Upper Transition Region Imager(SUTRI)onboard the Space Advanced Technology demonstration satellite(SATech-01),which was launched to a Sun-synchronous orbit at a height of~500 km in 2022 July,aims to test the on-orbit performance of our newly developed Sc/Si multi-layer reflecting mirror and the 2k×2k EUV CMOS imaging camera and to take full-disk solar images at the Ne VII 46.5 nm spectral line with a filter width of~3 nm.SUTRI employs a Ritchey-Chrétien optical system with an aperture of 18 cm.The on-orbit observations show that SUTRI images have a field of view of~416×416 and a moderate spatial resolution of~8″without an image stabilization system.The normal cadence of SUTRI images is 30 s and the solar observation time is about16 hr each day because the earth eclipse time accounts for about 1/3 of SATech-01's orbit period.Approximately15 GB data is acquired each day and made available online after processing.SUTRI images are valuable as the Ne VII 46.5 nm line is formed at a temperature regime of~0.5 MK in the solar atmosphere,which has rarely been sampled by existing solar imagers.SUTRI observations will establish connections between structures in the lower solar atmosphere and corona,and advance our understanding of various types of solar activity such as flares,filament eruptions,coronal jets and coronal mass ejections. | Xianyong Bai Hui Tian Yuanyong Deng Zhanshan Wang Jianfeng Yang Xiaofeng Zhang Yonghe Zhang Runze Qi Nange Wang Yang Gao Jun Yu Chunling He Zhengxiang Shen Lun Shen Song Guo Zhenyong Hou Kaifan Ji Xingzi Bi Wei Duan Xiao Yang Jiaben Lin Ziyao Hu Qian Song Zihao Yang Yajie Chen Weidong Qiao Wei Ge Fu Li Lei Jin Jiawei He Xiaobo Chen Xiaocheng Zhu Junwang He Qi Shi Liu Liu Jinsong Li Dongxiao Xu Rui Liu Taijie Li Zhenggong Feng Yamin Wang Chengcheng Fan Shuo Liu Sifan Guo Zheng Sun Yuchuan Wu Haiyu Li Qi Yang Yuyang Ye Weichen Gu Jiali Wu Zhe Zhang Yue Yu Zeyi Ye Pengfeng Sheng Yifan Wang Wenbin Li Qiushi Huang Zhong Zhang | 2023 | Research in Astronomy and Astrophysics2023，23，6： | 1 |
| 16 | One step growth of high luminescence CdTe quantum dots with low cytotoxicity in ambient atmospheric conditions显示文摘 | Sheng Zonghai Han Heyou Hu Xiaofeng | | 0，，： | 1 |
| 17 | Shaped-Beam Pattern Synthesis Through the Construction of Weighted Generalized Rayleigh Quotient显示文摘A novel shaped-beam pattern synthesis method of generating an arbitrary footprint pattern under an arbitrary array structure is proposed. The embedded element pattern information is included in the pattern model, and a new cost function composed of three optimization items which are sidelobe levels,mainlobe ripples and mainlobe gains is constructed through the model. During the optimization process,to further enhance the performance of the synthesized pattern, a weight matrix is designed and added to the optimization items, then the generalized Rayleigh quotient approximation method is used to obtain the final array element excitations. To illustrate the good performance of the provided method, several synthesis examples with different arrays and footprints are presented. Compared with other algorithms such as Weighted alternating reverse projection(WARP) method, the proposed method can achieve better results with lower sidelobe levels, smaller mainlobe ripples and less computational load. | YANG Yin WAN Chuan SHENG Weixing HAN Yubing MA Xiaofeng | 2019 | Chinese Journal of Electronics2019，28，1： | 1 |
| 18 | Robust adaptive beamforming for large-scale arrays显示文摘 | Fei Huang Weixing Sheng Xiaofeng Ma Wei Wang | 2009 | Signal Processing2009，，1： | 1 |
| 19 | Study of dual temperature control method on cyclic total reflux batch distillation 显示文摘 | BAI Peng LI Xiaofeng SHENG Min | 2007 | Chem Eng Process2007，46，8： | 1 |
| 20 | Circuit model and signal integrity analysis for mu|tilayer printed circuit board interconnection 显示文摘 | Kong Fan Sheng Weixing Ma Xiaofeng | 2014 | International Journal of RF and Microwave Computer-Aided Engineering2014，24，4： | 1 |
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