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| 1 | Non-Orthogonal Multiple Access(NOMA) for Future Downlink Radio Access of 5G显示文摘Multiple access(MA) technology is of most importance for 5G. Non-orthogonal multiple access(NOMA) utilizing power domain and advanced receiver has been considered as a promising candidate MA technology recently. In this paper, the NOMA concept is presented toward future enhancements of spectrum efficiency in lower frequency bands for downlink of 5G system. Key component technologies of NOMA are presented and discussed including multiuser transmission power allocation, scheduling algorithm, receiver design and combination of NOMA with multi-antenna technology. The performance gains of NOMA are evaluated by system-level simulations with very practical assumptions. Under multiple configurations and setups, the achievable system-level gains of NOMA are shown promising even when practical considerations were taken into account. | LI Anxin LAN Yang CHEN Xiaohang JIANG Huiling | 2015 | China Communications2015，12，S1： | 12 |
| 2 | The Medium Energy X-ray telescope (ME) onboard the Insight-HXMT astronomy satellite显示文摘The Medium Energy X-ray telescope(ME) is one of the three main telescopes on board the Insight hard X-ray modulation telescope(Insight-HXMT) astronomy satellite. ME contains 1728 pixels of Si-PIN detectors sensitive in 5-30 ke V with a total geometrical area of 952 cm^2. The application specific integrated circuit(ASIC) chip, VA32TA6, is used to achieve low power consumption and low readout noise. The collimators define three kinds of field of views(FOVs) for the telescope, 1°×4°, 4°×4°,and blocked ones. Combination of such FOVs can be used to estimate the in-orbit X-ray and particle background components.The energy resolution of ME is ~3 ke V at 17.8 ke V(FWHM) and the time resolution is 255 μs. In this paper, we introduce the design and performance of ME. | XueLei Cao WeiChun Jiang Bin Meng WanChang Zhang Tao Luo Sheng Yang ChunLei Zhang YuDong Gu Liang Sun XiaoJing Liu JiaWei Yang Xian Li Ying Tan ShaoZhen Liu YuanYuan Du FangJun Lu YuPeng Xu Ju Guan ShuangNan Zhang HuanYu Wang TiPei Li ChengMo Zhang XiangYang Wen JinLu Qu LiMing Song XiaoBo Li MingYu Ge YuPeng Zhou ShaoLin Xiong Shu Zhang YongJie Zhang ZeHao Cheng Fei Zhang MaoShun Li XiaoHua Liang Min Gao EnBo Yang XiaoHang Liu HongWei Liu YiJung Yang Fan Zhang | 2020 | Science China(Physics,Mechanics & Astronomy)2020，63，4： | 5 |
| 3 | Use of a modified ureteral access sheath in semi-rigid ureteroscopy to treat large upper ureteral stones is associated with high stone free rates显示文摘Objective:To examine differences in outcomes of semi-rigid ureteroscopy(URS)with or without a modified-ureteral-access-sheath(mUAS)to treat large upper ureteral stones.Methods:Patients with single,radio-opaque large upper ureteral stone(≥10 mm)treated using semi-rigid URS between August 2013 and October 2016 were retrospectively evaluated.The stone-free status was determined from Kidney-ureter-bladder(KUB)X-ray films taken on postoperative Day 1 and after 1 month.Results:Of 103 patients meeting inclusion criteria,43(41.75%)and 60(58.25%)were treated with semi-rigid URS with and without mUAS,respectively.The immediate stone-free rate(SFR)for the mUAS group was significantly higher than the non-mUAS group(40[93.0%]vs.46[76.7%];p=0.033).The SFR at 1 month was also high for patients treated using mUAS,but not statistically different from patients not treated with mUAS(41[95.3%]mUAS vs.51[85.0%]non-mUAS;p=0.115).Auxiliary procedure rates were significantly lower for mUAS patients compared to non-mUAS patients(2[4.7%]vs.14[23.3%];p=0.01).There were no significant differences in surgical duration and hospital stays,and the overall complication rates were statistically similar for mUAS patients compared to non-mUAS patients(1[2.3%]vs.3[5.0%];p=0.638). | Jad Khaled AlSmadi Xiaohang Li Guohua Zeng | 2019 | Asian Journal of Urology2019，6，3： | 5 |
| 4 | Testing and Improving the Performance of the Common Land Model:A Case Study for the Gobi Landscape显示文摘Land surface processes take place on the interface between the earth and atmosphere, exerting significant influences on the weather and climate. Correct modeling of these processes is important to numerical weather forecast and climate prediction. In order to obtain a more thorough understanding of the land surface processes over the Gobi landscape, we evaluated the performance of the Common Land Model(Co LM) at Dunhuang station in Gansu Province of China to determine whether the model formulation, driven by observational data, is capable of simulating surface fluxes over the underlying desert surface. In comparison with the enhanced observation data collected at Dunhuang station over the period 22–28 August 2008, the results showed that the surface albedo simulated by Co LM was larger than that in the observation, and the simulated surface temperature was lower than the observed. After the measured values were used to correct the surface albedo, the solar radiation absorbed by the ground surface was more consistent with the measurements. A new empirical relationship of the surface thermal exchange coefficient rah was used to modify the thermal aerodynamic impedance. The simulated soil surface temperature became significantly closer to the observed value, and the simulated surface sensible heat as well as net radiative fluxes were also improved. | Chao WANG Zhigang WEI Zhenchao LI Tiangui XIAO Xiaohang WEN | 2017 | Journal of Meteorological Research2017，31，3： | 4 |
| 5 | Screening and Characterization of the Alkaline Protease Isolated from PLI-1, a Strain of Brevibacillus sp. Collected from Indonesia's Hot Springs显示文摘A total of 69 strains of thermophilic bacteria were isolated from water, soil and sediment samples from three Indonesia's hot spring areas (Pantai cermin, Kalianda and Banyu wedang) by using Minimal Synthetic Medium (MSM). The extreme thermophile Brevibacillus sp. PLI-1 was found to produce extracellular thermophilic alkaline protease with optimal activity at 70℃ and pH 8.0-9.0. The molecular weight of the protease was estimated to be around 56 kD by SDS-PAGE. The maximum activity of the protease was 26.54 U mL-1. The protease activity did not decrease after 30 min and still retained more than 70% of relative activity after 60 min at 70℃ and pH 8.0. The ion Mg2+ was found to promote protease activity at both low and high concentrations, whereas Cu2+ and Zn2+ could almost completely inhibit the activity. Divalent cation chelator EDTA inhibited the enzyme activity by 55.06% ± 0.27%, while the inhibition caused by PMSF, Leupeptin, Pepstain A and Benzamidine were 66.78% ± 3.25%, 52.37% ± 0.25%, 62.47% ± 2.96% and 50.99% ± 0.24%, respectively. Based on these observations, the enzyme activity was conspicuously sensitive to the serine and cysteine protease inhibitors. All these results indicated that the protease isolated from the strain PLI-1 was a thermophilic protease and had a high-temperature stability and a pH stability. | WANG Shuai LIN Xuezheng HUANG Xiaohang ZHENG Li Dewi Seswita Zilda | 2012 | Journal of Ocean University of China2012，11，2： | 3 |
| 6 | Engineering of multiple bound states in the continuum by latent representation of freeform structures显示文摘We demonstrate a neural network capable of designing on-demand multiple symmetry-protected bound states in the continuum(BICs)in freeform structures with predefined symmetry.The latent representation of the freeform structures allows the tuning of the geometry in a differentiable,continuous way.We show the rich band inversion and accidental degeneracy in these freeform structures by interacting with the latent representation directly.Moreover,a high design accuracy is demonstrated for arbitrary control of multiple BIC frequencies by using a photonic property readout network to interpret the latent representation. | Ronghui Lin Zahrah Alnakhli Xiaohang Li | 2021 | Photonics Research2021，9，4： | 3 |
| 7 | Sensor Fault Estimation and Fault-Tolerant Control for a Class of Takagi-Sugeno Markovian Jump Systems with Partially Unknown Transition Rates Based on the Reduced-Order Observer显示文摘This paper addresses the problem on sensor fault estimation and fault-tolerant control for a class of Takagi-Sugeno Markovian jump systems,which are subjected to sensor faults and partially unknown transition rates.First,the original plant is extended to a descriptor system,where the original states and the sensor faults are assembled into the new state vector.Then,a novel reduced- order observer is designed for the extended system to simultaneously estimate the immeasurable states and sensor faults.Second,by using the estimated states obtained from the designed observer,a state- feedback fault-tolerant control strategy is developed to make the resulting closed-loop control system stochastically stable.Based on linear matrix inequality technique,algorithms are presented to compute the observer gains and control gains.The effectiveness of the proposed observer and controller are validated by a numerical example and a compared study,respectively,and the simulation results reveal that the proposed method can successfully estimate the sensor faults and guarantee the stochastic stability of the resulting closed-loop system. | LI Xiaohang LU Dunke ZHANG Wei ZHU Fanglai | 2018 | Journal of Systems Science & Complexity2018，31，6： | 3 |
| 8 | Tapering-induced enhancement of light extraction efficiency of nanowire deep ultraviolet LED by theoretical simulations显示文摘A nanowire(NW) structure provides an alternative scheme for deep ultraviolet light emitting diodes(DUV-LEDs)that promises high material quality and better light extraction efficiency(LEE). In this report, we investigate the influence of the tapering angle of closely packed Al Ga N NWs, which is found to exist naturally in molecular beam epitaxy(MBE) grown NW structures, on the LEE of NW DUV-LEDs. It is observed that, by having a small tapering angle, the vertical extraction is greatly enhanced for both transverse magnetic(TM) and transverse electric(TE) polarizations. Most notably, the vertical extraction of TM emission increased from 4.8% to 24.3%,which makes the LEE reasonably large to achieve high-performance DUV-LEDs. This is because the breaking of symmetry in the vertical direction changes the propagation of the light significantly to allow more coupling into radiation modes. Finally, we introduce errors to the NW positions to show the advantages of the tapered NW structures can be projected to random closely packed NW arrays. The results obtained in this paper can provide guidelines for designing efficient NW DUV-LEDs. | RONGHUI LIN SERGIO VALDES GALAN HAIDING SUN YANGRUI HU MOHD SHARIZAL ALIAS BILAL JANJUA TIEN KHEE NG BOON S.OOI XIAOHANG LI | 2018 | Photonics Research2018，6，5： | 3 |
| 9 | Revealing the surface electronic structures of AIGaN deep-ultraviolet multiple quantum wells with lateral polarity domains显示文摘We report on the carrier dynamic and electronic structure investigations on AlGaN-based deep-ultraviolet multiple quantum wells (MQWs)with lateral polarity domains.The localized potential maximum is predicted near the domain boundaries by first-principle calculation,suggesting carrier localization and efficient radiative recombination.More importantly,lateral band diagrams of the MQWs are proposed based on electron affinities and valance band levels calculated from ultraviolet(UV)photoelectron spectroscopy.The proposed lateral band diagram is further demonstrated by surface potential distribution collected by Kelvin probe microscopy and the density-of-state calculation of energy bands.This work illustrates that lateral polarity structures are playing essential roles in the electronic properties of II nitride photonic devices and may provide novel perspective in the realization of high-efficiency UV emitters. | WEI GUO LI CHEN HOUQIANG XU YINGDA QIAN MOHEB SHEIKHI JASON HOO SHIPING GUO LIANG XU JIANZHE LU FERAS ALQATARI XIAOHANG LI KAIYAN HE ZHE CHUAN FENG JICHUN YE | 2020 | Photonics Research2020，8，6： | 2 |
| 10 | Hollow Gradient-Structured Iron-Anchored Carbon Nanospheres for Enhanced Electromagnetic Wave Absorption显示文摘In the present paper,a microwave absorber with nanoscale gradient structure was proposed for enhancing the electromagnetic absorption performance.The inorganic-organic competitive coating strategy was employed,which can effectively adjust the thermodynamic and kinetic reactions of iron ions during the solvothermal process.As a result,Fe nanoparticles can be gradually decreased from the inner side to the surface across the hollow carbon shell.The results reveal that it offers an outstanding reflection loss value in combination with broadband wave absorption and flexible adjustment ability,which is superior to other relative graded distribution structures and satisfied with the requirements of lightweight equipment.In addition,this work elucidates the intrinsic microwave regulation mechanism of the multiscale hybrid electromagnetic wave absorber.The excellent impedance matching and moderate dielectric parameters are exhibited to be the dominative factors for the promotion of microwave absorption performance of the optimized materials.This strategy to prepare gradient-distributed microwave absorbing materials initiates a new way for designing and fabricating wave absorber with excellent impedance matching property in practical applications. | Cao Wu Jing Wang Xiaohang Zhang Lixing Kang Xun Cao Yongyi Zhang Yutao Niu Yingying Yu Huili Fu Zongjie Shen Kunjie Wu Zhenzhong Yong Jingyun Zou Bin Wang Zhou Chen Zhengpeng Yang Qingwen Li | 2023 | Nano-Micro Letters2023，15，1： | 2 |
| 11 | Effect of seawater salinity on the synthesis of zeolite from coal fly ash显示文摘为沸石的合成的一个新奇方法在这份报纸被开发。在碱熔化和煤苍蝇灰(CFA ) 与不同咸度的海水被用作原料以后,合成被热水的激活执行。海水咸度在热水的过程期间为沸石结晶化从 32 ~ 88 被改变。结果证明那海水咸度在热水的治疗期间与 CFA 在沸石合成起一个重要作用。产品是 NaX 沸石和 hydroxysodalite 的混合物;海水咸度更强烈比类型和沸石的化学作文影响了结晶化。逐渐地转变成沸石的 CFA 的收益随咸度的增加升起了,当咸度分别地从 32 ~ 88 增加了,到达 48%62% 的转变率。建议方法允许副产品的有效处理;因此,在沸石合成的海水的应用程序介绍有希望的经济、生态的好处。 | Yanqing YU XiaoHang LI Xiaolan ZOU Xiaobin ZHU | 2014 | Frontiers of Environmental Science & Engineering2014，8，1： | 2 |
| 12 | Characteristics and Possible Formation Mechanisms of Severe Storms in the Outer Rainbands of Typhoon Mujigae(1522)显示文摘To better understand how severe storms form and evolve in the outer rainbands of typhoons, in this study, we investigate the evolutionary characteristics and possible formation mechanisms for severe storms in the rainbands of Typhoon Mujigae, which occurred during 2–5 October 2015, based on the NCEP–NCAR reanalysis data, conventional observations, and Doppler radar data. For the rainbands far from the inner core(eye and eyewall) of Mujigae(distance of approximately 70–800 km), wind speed first increased with the radius expanding from the inner core, and then decreased as the radius continued to expand. The Rankine Vortex Model was used to explore such variations in wind speed. The areas of strong stormy rainbands were mainly located in the northeast quadrant of Mujigae, and overlapped with the areas of high winds within approximately 300–550 km away from the inner core, where the strong winds were conducive to the development of strong storms. A severe convective cell in the rainbands developed into waterspout at approximately 500 km to the northeast of the inner core, when Mujigae was strengthening before it made landfall. Two severe convective cells in the rainbands developed into two tornadoes at approximately350 km to the northeast of the inner core after Mujigae made landfall. The radar echo bands enhanced to 60 d BZ when mesocyclones occurred in the rainbands and induced tornadoes. The radar echoes gradually weakened after the mesocyclones weakened. The tops of parent clouds of the mesocyclones elevated at first, and then suddenly dropped about 20 min before the tornadoes appeared. Thereby, the cloud top variation has the potential to be used as an early warning of tornado occurrence. | Bingyun WANG Ming WEI Wei HUA Yongli ZHANG Xiaohang WEN Jiafeng ZHENG Nan LI Han LI Yu WU Jie ZHU Mingjun ZHANG | 2017 | Journal of Meteorological Research2017，31，3： | 2 |
| 13 | Geochemistry and zircon U-Pb chronology of quartz porphyry in Yuejinshan Fe-polymetallic deposit of Heilongjiang显示文摘Quartz porphyry in Yuejinshan Fe-polymetallic deposit is one of the rock masses, which formed the granite belt relating to the late Yanshanian skarn-type Fe-polymetallic deposits in the eastern Heilongjiang, and is also closely related to the metallogenic space of the Fe-polymetallic deposits. Quartz porphyry has the zircon U-Pb concordia age of 125.0±1.1 Ma, overall showing high Si(SiO_2=74.48%--75.00%), rich alkaline(Na_2O+K_2O=7.93%--8.17%, K_2O/Na_2O=1.39--1.46), and poor Mg(MgO=0.27%--0.31%), with the A/CNK value being 0.95--0.99, having the characteristics of obvious enrichment of LREE and medium Eu negative anomaly(0.69--0.74), indicating that the rock belongs to quasi-aluminous high potassium calc-alkaline series and has the same characteristics as those of the I-type granite. The rock is also characterized by the enrichment of LILE and active incompatible elements, and depletion of HFSE such as Nb, Ta, P and Ti, with the Mg~# value being 32--37, indicating that the rock originated from partial melting of crustal materials. It can be concluded from the above characteristics or data and from the distribution of contemporary magmatic rocks in the area, that quartz porphyry in Yuejinshan Fe-polymetallic deposit was formed in a tectonic background of the subduction of the paleo-Pacific plate in late Yanshanian. | JIN Ye CUI Bo WANG Li YANG Baihui YIN Yue LI Qing WANG Shuo CHEN Xiaohang LIU Xiang | 2019 | Global Geology2019，22，2： | 2 |
| 14 | Recent progress on the modification of high nickel contentNCM:Coating,doping,and single crystallization显示文摘High nickel content layered cathodes,represented by NCM(LiNi_(x)Co_(y)Mn_(z)O_(2),x+y+z=1),are now widely employed in the market of electric vehicles,owing to their high energy density.With the gradual increase of nickel content and capacity,the issues on cycling life and safety become more serious.In this review,various strategies for improving the performance of high nickel NCM are summarized on the aspects of surface coating,ionic doping,and singlecrystal NCM.The coating strategy was separately described according to the physical property of coating species,including inert material coating,Li^(+)-conductor coating,electronic conductor coating,and mixed conductor coating.These coating species help to suppress the interfacial oxidation of electrolytes by NCM,improving the cycling life and safety.The elemental doping in the crystal lattice of NCM is then presented in the aspects of cation,anion,and mixed-ion doping,which are beneficial to stabilize the layered structure during charge–discharge and so promote the electrochemical performance.In quite recent years,the strategy of single-crystal NCM was demonstrated to be a promising pathway,owing to the dramatically reduced surface area and grain boundary.Finally,the remaining unsolved challenges and future strategies for further development of NCM cathode materials are outlined. | Junqing Yan Hao Huang Junfan Tong Wei Li Xiaohang Liu Haoxuan Zhang Heqin Huang Weidong Zhou | 2022 | Interdisciplinary Materials2022，1，3： | 2 |
| 15 | Structures of the N- and C-terminal domains of MHV-A59 nucleocapsid protein corroborate a conserved RNA-protein binding mechanism in coronavirus显示文摘Coronaviruses are the causative agent of respiratory and enteric diseases in animals and humans.One example is SARS,which caused a worldwide health threat in 2003.In coronaviruses,the structural protein N(nucleocapsid protein)associates with the viral RNA to form the filamentous nucleocapsid and plays a crucial role in genome replication and transcription.The structure of Nterminal domain of MHV N protein also implicated its specific affinity with transcriptional regulatory sequence(TRS)RNA.Here we report the crystal structures of the two proteolytically resistant N-(NTD)and C-terminal(CTD)domains of the N protein from murine hepatitis virus(MHV).The structure of NTD in two different crystal forms was solved to 1.5Å.The higher resolution provides more detailed structural information than previous reports,showing that the NTD structure from MHV shares a similar overall and topology structure with that of SARS-CoV and IBV,but varies in its potential surface,which indicates a possible difference in RNA-binding module.The structure of CTD was solved to 2.0-Åresolution and revealed a tightly intertwined dimer.This is consistent with analytical ultracentrifugation experiments,suggesting a dimeric assembly of the N protein.The similarity between the structures of these two domains from SARS-CoV,IBV and MHV corroborates a conserved mechanism of nucleocapsid formation for coronaviruses. | Yanlin Ma Xiaohang Tong Xiaoling Xu Xuemei Li Zhiyong Lou Zihe Rao | 2010 | Protein & Cell2010，1，7： | 2 |
| 16 | Enhanced complete photonic bandgap in a moderate refractive index contrast chalcogenide-air system with connected-annular-rods photonic crystals显示文摘Connected-annular-rods photonic crystals(CARPCs) in both triangular and square lattices are proposed to enhance the two-dimensional complete photonic bandgap(CPBG) for chalcogenide material systems with moderate refractive index contrast. For the typical chalcogenide-glass–air system with an index contrast of 2.8:1, the optimized square lattice CARPC exhibits a significantly larger normalized CPBG of about 13.50%, though the use of triangular lattice CARPC is unable to enhance the CPBG. It is almost twice as large as our previously reported result [IEEE J. Sel. Top. Quantum Electron. 22, 4900108(2016)]. Moreover, the CPBG of the square-lattice CARPC could remain until an index contrast as low as 2.24:1. The result not only favors wideband CPBG applications for index contrast systems near 2.8:1, but also makes various optical applications that are dependent on CPBG possible for more widely refractive index contrast systems. | JIN HOU CHUNYONG YANG XIAOHANG LI ZHENZHOU CAO SHAOPING CHEN | 2018 | Photonics Research2018，6，4： | 2 |
| 17 | ZIF-7@carbon composites as multifunctional interlayer for rapid and durable Li-S performance显示文摘The notorious'shuttle effect'of polysulfide during charge-discharge process induces grievous capacity fading,while the sluggish polysulfide conversion kinetics significantly hinders the development of practically viable lithium-sulfur(Li-S)batteries.In this study,a novel ZIF-7@carbon composite with ZIF-7 sheets vertically rooted on carbon cloth was developed as multifunctional interlayer to address these issues.The composite shows directional layered structure with outstanding compactness,and thus can provide massive active sites for accelerated redox reactions.The pore channels are perpendicular to the square surface,resulting in extremely high utilization of one-dimensional channels.Therefore,this structure can not only maintain the structural stability during the charge-discharge process by providing enough space for volume expansion,but also contribute to efficient exposure and utilization of active sites for the physical/chemical adsorption and catalytic conversion of polysulfide.As a result,Li-S batteries with the as-developed interlayer deliver a considerable areal capacity of 4.75 mAh cm^(-2) at an elevated sulfur loading of 5.5 mg cm^(-2),and an impressive cyclability with an extremely low capacity-fading rate of merely 0.04%per cycle over 500 cycles at 1 C. | Xingbo Wang Yan Zhao Feichao Wu Shuming Liu Zisheng Zhang Zhaoyang Tan Xiaohang Du Jingde Li | 2021 | Journal of Energy Chemistry2021，30，6： | 2 |
| 18 | Demand forecast Sharing in a Dualchannel Supply Chain显示文摘 | Xiaohang Yue John Li | 2006 | European Journal of Operational Research2006，174，1： | 1 |
| 19 | Real-time contrast-enhanced ultrasonography of resected and immunohistochemically proven hepatic angiomyolipomas显示文摘 | Rui Li Xiaohang Zhang Xing Hua Ping Cai Hua Zhong Yanli Guo Shiyi Ding XiaoChu Yan | 2010 | Abdominal Imaging2010，，6： | 1 |
| 20 | Development of a multi-component drug from turmeric using central composite design显示文摘基于繁体中文药开发多部件药的方法论用中央合成设计被开发了。从繁体中文药沉金的几个活跃部件在多部件 antitumor 药为使用被选择。反应表面方法论基于一个中央合成图案被使用决定量的作文活动关系以便在这药优化每个部件的数量。MTT (3-(4,5-dimethylthiazol-2-yl )-2,5-diphenyltetrazolium 溴化物) 试金被用来作为反应价值测量药理学活动。最佳联合的试验性的 antitumor 活动在 MTT 试金和上级是 92.85% 到每个单个部件的活动。这些结果证明那反应表面方法论对多部件药的设计基于一个中央合成图案合适。 | Xiaohang ZHANG Shengnan HAN Yan LI Jianlan JIANG | 2014 | Frontiers of Chemical Science and Engineering2014，8，3： | 1 |
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