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| 1 | The TanSat mission: preliminary global observations显示文摘The Chinese global carbon dioxide monitoring satellite (Tan Sat) was launched successfully in December2016 and has completed its on-orbit tests and calibration. Tan Sat aims to measure the atmospheric column-averaged dry air mole fractions of carbon dioxide (XCO_2) with a precision of 4 ppm at the regional scale, and in addition, to derive global and regional CO2fluxes. Progress towards these objectives is reviewed and the first scientific results from Tan Sat measurements are presented. Tan Sat on-orbit tests indicate that the Atmospheric Carbon dioxide Grating Spectrometer is in normal working status and is beginning to produce L1B products. The preliminary Tan Sat XCO_2products have been retrieved by an algorithm and compared to NASA Orbiting Carbon Observatory-2 (OCO-2) measurements during an overlapping observation period. Furthermore, the XCO_2retrievals have been validated against eight groundsite measurement datasets from the Total Carbon Column Observing Network, for which the preliminary conclusion is that Tan Sat has met the precision design requirement, with an average bias of 2.11 ppm.The first scientific observations are presented, namely, the seasonal distributions of XCO_2over land on a global scale. | Yi Liu Jing Wang Lu Yao Xi Chen Zhaonan Cai Dongxu Yang Zengshan Yin Songyan Gu Longfei Tian Naimeng Lu Daren Lyu | 2018 | Science Bulletin2018，63，18： | 23 |
| 2 | Microstructure and properties of ZL205 Alloy显示文摘The microstructure, precipitate type, precipitate distribution and tensile strength of a ZL205 alloy, beforeand after ageing treatment, have been studied by means of optical microscopy and transmission electron microscopy.The results showed that the as-cast microstructure of the alloy was made up of α-Al and eutectic phase distributedat the grain boundaries. During ageing treatment, the tensile strength increased at first and then reduced with time,and the highest ultimate tensile strength was found to be around 488.2 MPa. | Mi Guofa Wang Kuangfei Gong Haijun Wang Hongwei Zeng Songyan | 2008 | China Foundry2008，5，1： | 6 |
| 3 | Association between glucose transporter 1 rs841853 polymorphism and type 2 diabetes mellitus risk may be population specific (葡萄糖转移酶1的rs841853基因多态性与2型糖尿发生风险的关系可能具有人群特异性)显示文摘 | Bing Du Shengmao Liu Chengji Cui Songyan Wang Wenpeng Cui | 2013 | Journal of Diabetes2013，，3： | 6 |
| 4 | TanSat Mission Achievements: from Scientific Driving to Preliminary Observations显示文摘The Chinese global carbon dioxide monitoring satellite(TanSat)was successfully launched in December 2016 and has completed its on-orbit tests and calibration.TanSat aims to measure the atmospheric Carbon Dioxide column-averaged dry air mole fractions(X_(CO_2))with a precision of 4 ppm at the regional scale,and further to derive the CO_2 global and regional fluxes.Progress toward these objectives is reviewed and the first scientific results from TanSat measurements are presented.During the design phase,Observation System Simulation Experiments(OSSE)on TanSat measurements performed prior to launch measurements using a nadir and a glint alternative mode when considering the balance of stable measurements and reduces the flux uncertainty(64%).The constellation measurements of two satellites indicate an extra 10%improvement in flux inversion if the satellite measurements have no bias and similar precision.The TanSat on-orbit test indicates that the instrument is stable and beginning to produce X_(CO_2)products.The preliminary TanSat measurements have been validated with Total Carbon Column Observing Network(TCCON)measurements and have inter-compared with OCO-2 measurements in an overlap measurement. | LIU Yi WANG Jing YAO Lu CHEN Xi CAI Zhaonan YANG Dongxu YIN Zengshan GU Songyan TIAN Longfei LU Naimeng L Daren | 2018 | 空间科学学报2018，38，5： | 2 |
| 5 | To Learn or Not to Learn:Deep Learning Assisted Wireless Modem Design显示文摘Deep learning is driving a radical paradigm shift in wireless communications,all the way from the application layer down to the physical layer.Despite this,there is an ongoing debate as to what additional values artificial intelligence(or machine learning)could bring to us,particularly on the physical layer design;and what penalties there may have?These questions motivate a fundamental rethinking of the wireless modem design in the artificial intelli gence era.Through several physicallayer case studies,we argue for a significant role that machine learning could play,for instance in parallel errorcontrol coding and decoding,channel equalization,interference cancellation,as well as multiuser and multiantenna detection.In addition,we discuss the fundamental bottlenecks of machine learning as well as their potential solutions in this paper. | XUE Songyan LI Ang WANG Jinfei YI Na MA Yi Rahim TAFAZOLLI Terence DODGSON | 2019 | ZTE Communications2019，17，4： | 1 |
| 6 | Preparation and Microstructure of In-Situ Particle Reinforced Titanium Matrix Alloy显示文摘 | Zhang Erlin Zeng Songyan Wang Bin | 2002 | Journal of Materials Processing Technology2002，，： | 1 |
| 7 | Surface molecular doping of all-inorganic perovskite using zethrenes molecules显示文摘We present an optical and photoelectron spectroscopic study to elucidate the interfacial electronic properties of organic-inorganic semiconductor heterojunctions formed in a kinetically blocked heptazethrene triisopropylsilyl ethynylene (HZ-TIPS) and its homologue,octazethrene (OZ-TIPS) on an all-inorganic perovskite cesium lead bromide (CsPbBr3) surface.The photoluminescence behavior of the underlying perovskites upon differing molecular doping conditions was examined.It turns out that the charge transfer dynamics of thermally-evaporated OZ-TIPS molecule exhibited a faster average lifetime than that of the HZ-TIPS case suggesting the importance of the biradical state in the former molecule.An interfacial dipole was formed at the interface due to the competing interaction between the dispersion force of the bulky TIPS-substituent group and the attractive van der Waals interaction at the first few layers.Photoemission spectroscopy of the physisorbed HZ-TIPS shows chemical shifts,which indicates electron transfer from HZ-TIPS molecules to the CsPbBr3 perovskite single crystal.In contrast,the adsorbed OZ-TIPS molecular layer on CsPbBr3 demonstrates the opposite trend indicating a hole transfer process.The average molecular orientation as determined by near edge X-ray absorption fine structure (NEXAFS) suggests that the HZ-TIPS molecular plane is generally lifted with respect to the perovskite surface.We suggest that the nature of the closed-shell electronic ground state of HZ-TIPS could contribute to the formation of interfacial dipole at the molecule/perovskite interface. | Arramel Hu Pan Aozhen Xie Songyan Hou Xinmao Yin Chi Sin Tang Nguyen T.Hoa Muhammad D.Birowosuto Hong Wang Cuong Dang Andrivo Rusydi Andrew T.S.Wee Jishan Wu | 2019 | Nano Research2019，12，1： | 1 |
| 8 | Robust spline-line energy management guidance algorithm with multiple constraints and uncertainties for solid rocket ascending显示文摘For the solid rocket with depletion shutdown system,effective energy management is significant to meet terminal constraints by exhausting excess energy.Several traditional energy management algorithms cannot satisfy the altitude constraint and path constraints are not sufficiently considered.The velocity adjustment capability of these algorithms is limited and the uncertainties are not considered.Based on the on-line programming of velocity capability curve,Spline-Line Energy Management(SLEM)guidance algorithm is proposed.It introduces lateral maneuvers to further consume the available velocity on the basis of longitudinal energy management.After expressing the constraints as several algebraic equations,the closed-loop guidance problem is converted to solving a system of nonlinear equations about the curve parameters in real time.The advantage is that the altitude constraint can be satisfied theoretically.The overload and control variable change rate and amplitude constraints are also considered during the flight by constructing the feasible boundary of velocity capability curve.To improve the robustness,it is further extended by estimating the actual uncertainties.The effectiveness and advantages of SLEM are demonstrated by simulations and comparisons with other energy management algorithms.Simulation results show that the proposed approach can satisfy multiple constraints with high precision under the condition of uncertainties. | Songyan WANG Fei LIU Tao CHAO Ming YANG | 2022 | Chinese Journal of Aeronautics2022，35，2： | 1 |
| 9 | Achieving Copenhagen Target through Carbon Emission Trading: Economic Impacts Assessment in Guangdong Province of China 显示文摘 | Wang Peng Dai Hancheng Ren Songyan | 2015 | Energy2015，79，： | 1 |
| 10 | Accurate determination of the CO2-brine interfacial tension using graphical alternating conditional expectation显示文摘 | LI Zhaomin WANG Shuhua LI Songyan | 2014 | Energy&Fuels2014，28，1： | 1 |
| 11 | Calibration analyses for sounding channels of MWHS onboard FY-3A 显示文摘 | Gu Songyan Guo Yang Wang Zhenzhan | 2012 | IEEE Transactions on Geoscience and Remote Sensing2012，50，12： | 1 |
| 12 | Implications of Stahl's Theorems to Holomorphic Embedding Part II: Numerical Convergence显示文摘What has become known as Stahl's Theorem in power-engineering circles has been used to justify a convergence guarantee of the Holomorphic Embedding Method(HEM)as it applies to the power-flow problem.In this,the second part of a two-part paper,we examine implications to numerical convergence of the HEM and the numerical properties of a Pade approximant algorithm.We show that even if the point of interest is within the convergence domain,numerical convergence of the sequence of Pade approximants computed with finite precision is not guaranteed.We propose a convergence factor equation that can be used to both estimate the convergence rate and the capacity of the branch cut.We also show that the study of convergence properties of the Pade approximant is the study of the location of the branch-points of the function,which in turn dictate branch-cut topology and capacity and,therefore,convergence rate. | Abhinav Dronamraju Songyan Li Qirui Li Yuting Li Daniel Tylavsky Di Shi Zhiwei Wang | 2021 | CSEE Journal of Power and Energy Systems2021，7，4： | 1 |
| 13 | Linear-quadratic and norm-bounded differential game combined guidance strategy against active defense aircraft in three-player engagement显示文摘A new type of guidance strategy, combining linear quadratic and norm-bounded game theory, is proposed for the scenario of an attacker against active defense aircraft in three-player engagement. The problem involves three players, an attacker, a defender and a target. The differential game theory and the solution of Hamiltonian equation are utilized to obtain the combined guidance strategy for each player with arbitrary-order dynamics. The game process is divided into4 phases, C1-C4, according to the switching time. The linear quadratic differential game guidance scheme is employed to reduce the fuel cost in the game parts of C1 and C3. The norm-bounded game guidance strategy is adopted to satisfy the constraint of control input in the game stages C2 and C4. Furthermore, zero-effort miss distance is introduced to meet the constraints of game space and defender’s killing radius in the guidance strategy, which guarantees that the attacker is able to avoid the interception of the defender and hit the target with lower fuel cost and maximum acceleration. And it is proved that the proposed guidance strategy satisfies the Nash equilibrium condition. Finally, the feasibility and superiority of combined guidance strategy are respectively illustrated by nonlinear numerical simulation and verified by comparing with linear quadratic and norm-bounded differential game guidance strategies. | Tao CHAO Xintao WANG Songyan WANG Ming YANG | 2023 | Chinese Journal of Aeronautics2023，36，8： | 0 |
| 14 | Modified rolling guidance law for single moving mass controlled reentry vehicle against maneuvering target with impact angle constraints显示文摘This paper deals with the problem of guidance law design for the single moving mass controlled reentry vehicle when impact angle constraints and maneuvering target are taken into consideration.More specifically,a modified rolling guidance law is proposed with the interactive virtual target and the landing point prediction strategy.First,considering the fact that the roll channel can be controlled directly,the relative motion between the single moving mass controlled reentry vehicle and the target is described by the error angle between the relative velocity and the line-ofsight.Second,a nonlinear error angle command is given to reduce the rotation rate.To satisfy impact angle constraints,an interactive virtual target is presented and the‘‘S”formed velocity of the virtual target is given to abate the error angle tracking difficulty at the final stage of the reentry phase.Then,the landing point prediction strategy is employed and the motion variation trend is also taken into consideration.As the maneuvering target is replaced with the predicted landing point,the error angle tracking difficulty caused by the target velocity decreases,which is helpful to meet impact angle constraints and improve guidance accuracy at the same time.Finally,the finite-time rolling guidance law is proposed and proved via Lyapunov stability theorem.Compared with the existing method,lower-speed rotation,smaller missing distance and less impact angle errors are obtained,which can be demonstrated by numerical simulations. | Guanlin LI Ming YANG Songyan WANG Tao CHAO | 2022 | Chinese Journal of Aeronautics2022，35，6： | 0 |
| 15 | Integrated guidance and control design method based on finite-time state observer显示文摘A composited integrated guidance and control(IGC) algorithm is presented to tackle the problem of the IGC design in the dive phase for the bank-to-turn(BTT) vehicle with the inaccuracy information of the line-of-sight(LOS) rate. For the sake of theoretical derivation, an IGC model in the pitch plane is established. The high-order finite-time state observer(FTSO), with the LOS angle as the single input, is employed to reconstruct the states of the system online. Besides, a composited IGC algorithm is presented via the fusion of back-stepping and dynamic inverse. Compared with the traditional IGC algorithm, the proposed composited IGC method can attenuate effectively the design conservation of the flight control system, while the LOS rate is mixed with noise. Extensive experiments have been performed to demonstrate that the proposed approach is globally finite-time stable and strongly robust against parameter uncertainty. | MA Ping ZHANG Denghui WANG Songyan CHAO Tao | 2018 | Journal of Systems Engineering and Electronics2018，29，6： | 0 |
| 16 | Tuning the electron transport behavior at Li/LATP interface for enhanced cyclability of solid-state Li batteries显示文摘An interlayer is usually employed to tackle the interfacial instability issue between solid electrolytes(SEs)and Li metal caused by the side reaction.However,the failure mechanism of the ionic conductor interlayers,especially the influence from electron penetration,remains largely unknown.Herein,using Li1.3Al0.3Ti1.7(PO4)3(LATP)as the model SE and LiF as the interlayer,we use metal semiconductor contact barrier theory to reveal the failure origin of Li/LiF@LATP interface based on the calculation results of density functional theory(DFT),in which electrons can easily tunnel through the LiF grain boundary with F vacancies due to its narrow barrier width against electron injection,followed by the reduction of LATP.Remarkably,an Al-LiF bilayer between Li/LATP is found to dramatically promote the interfacial stability,due to the highly increased barrier width and homogenized electric field at the interface.Consequently,the Li symmetric cells with Al-LiF bilayer can exhibit excellent cyclability of more than 2,000 h superior to that interlayered by LiF monolayer(~860 h).Moreover,the Li/Al-LiF@LATP/LiFePO4 solid-state batteries deliver a capacity retention of 83.2%after 350 cycles at 0.5 C.Our findings emphasize the importance of tuning the electron transport behavior by optimizing the potential barrier for the interface design in high-performance solid-state batteries. | Linshan Luo Feng Zheng Haowen Gao Chaofei Lan Zhefei Sun Wei Huang Xiang Han Ziqi Zhang Pengfei Su Peng Wang Shengshi Guo Guangyang Lin Jianfang Xu Jianyuan Wang Jun Li Cheng Li Qiaobao Zhang Shunqing Wu Ming-Sheng Wang Songyan Chen | 2023 | Nano Research2023，16，1： | 0 |
| 17 | Simulation of the effects of defects in low temperature Ge buffer layer on dark current of Si-based Ge photodiodes显示文摘The influence of defects in low temperature Ge layer on electrical characteristics of p-Ge/i-Ge/n-Si and n-Ge/i-Ge/p-Ge photodiodes(PDs) was studied.Due to a two-step growth method,there are high defect densities in low-temperature buffer Ge layer.It is shown that the defects in low-temperature Ge layer change the band diagrams and the distribution of electric field,leading to the increase of the total dark current for p-Ge/i-Ge/n-Si PDs,whereas these defects have no influence on the dark current for n-Ge/i-Ge/p-Ge PDs.As a complement,a three-dimensional simulation of the total current under illumination was also performed. | Xiaohui Yi Zhiwei Huang Guangyang Lin Cheng Li Songyan Chen Wei Huang Jun Li Jianyuan Wang | 2017 | Journal of Semiconductors2017，38，4： | 0 |
| 18 | High gain,broadband p-WSe_(2)/n-Ge van der Waals heterojunction phototransistor with a Schottky barrier collector显示文摘Mixed-dimensional van der Waals(vdW)heterostructures based on two-dimensional transition metal dichalcogenides and threedimensional semiconductors have led to a new era in next-generation optoelectronics due to the high-quality interfaces and energy band complementation,especially in broadband photodetectors which can be used for all-weather navigation,object identification,etc.However,the reported photodetectors conventionally operated in photodiode mode with low responsivity and a narrow response spectrum.In this study,we report a p-WSe_(2)/n-Ge vdW heterojunction phototransistor with a Schottky barrier collector on n-Ge for broadband photodetection.Large hole/electron injection ratio from p-WSe_(2)/n-Ge heterojunction under forward bias due to their large bandgap offset renders the high photocurrent gain,while the Ge Schottky barrier limits the dark current.The responsivities of the phototransistor at 1.0 V emitter-collector bias are 55,95,and 120 A·W−1 at 405,1,310,and 1,550 nm,respectively,which is superior to that of the corresponding p-WSe_(2)/n-Ge photodiodes.The phototransistor shows a high photocurrent gain of 80,a specific detectivity of 1011 Jones,as well as a fast response time of 290μs at 1,550 nm.The results suggest that the novel phototransistor being implemented with complementary metal-oxide-semiconductor processing is an ideal strategy for high-performance broadband photodetection. | Shuo Li Qiang Wu Haokun Ding Songsong Wu Xinwei Cai Rui Wang Jun Xiong Guangyang Lin Wei Huang Songyan Chen Cheng Li | 2023 | Nano Research2023，16，4： | 0 |
| 19 | Simple and rapid determination of dioxin in fish and sea food using a highly sensitive reporter cell line,CBG 2.8D显示文摘Food,especially animal origin food is the main source of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs),and dioxin-like polychlorinated biphenyls(dl-PCBs)for human exposure.So,a simple,rapid and cheap bioassay method is needed for determination of dioxins in food samples.In this study,we used a new highly sensitive reporter cell line to determine the concentration of dioxins in 33 fish and seafood samples.The samples were extracted by shaking with water/isopropanol(1:1 v/v)and hexane and cleaned-up by a multi layered silica gel column and an alumina column,then analyzed using CBG 2.8 D cell line.We compared the results obtained from the CBG 2.8 D cell assay to those obtained from conventional High-Resolution Gas Chromatography-High Resolution Mass Spectrometry(HRGC-HRMS)analysis.Good correlations were observed between these two methods(r^2=0.93).While the slope of regression line was 1.76,the bioanalytical equivalent(BEQ)values were 1.76 folds higher than WHO-TEQ values and the conversion coefficient was 0.568(the reciprocal of 1.76).In conclusion,CBG 2.8 D cell assay was an applicable method to determine dioxins levels in fish and sea food samples. | Gangdou Ding Lingyun Wang Songyan Zhang Shuaizhang Li Qunhui Xie Li Xu Zhiguang Zhou YinFeng He Bin Zhao | 2021 | Journal of Environmental Sciences2021，33，2： | 0 |
| 20 | Electrical properties of Si/Si bonded wafers based on an amorphous Ge interlayer显示文摘An amorphous Ge(a-Ge) intermediate layer is introduced into the Si bonded interface to lower the annealing temperature and achieve good electrical characteristics. The interface and electrical characteristics of nSi/n-Si and p-Si/n-Si junctions manufactured by low-temperature wafer bonding based on a thin amorphous Ge are investigated. It is found that the bubble density tremendously decreases when the a-Ge film is not immersed in DI water. This is due to the decrease of the –OH groups. In addition, when the samples are annealed at 400 °C for20 h, the bubbles totally disappear. This can be explained by the appearance of the polycrystalline Ge(absorption of H_2) at the bonded interface. The junction resistance of the n-Si/n-Si bonded wafers decreases with the increase of the annealing temperature. This is consistent with the recrystallization of the a-Ge when high-temperature annealing is conducted. The carrier transport of the Si-based PN junction annealed at 350 °C is consistent with the trap-assisted tunneling model and that annealed at 400 °C is related to the carrier recombination model. | Shaoming Lin Shaoying Ke Yujie Ye Donglin Huang Jinyong Wu Songyan Chen Cheng Li Jianyuan Wang Wei Huang | 2018 | Journal of Semiconductors2018，39，11： | 0 |
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