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| 1 | Paleo-fires and Atmospheric Oxygen Levels in the Latest Permian:Evidence from Maceral Compositions of Coals in Eastern Yunnan,Southern China显示文摘从三节在的晚二叠的煤的 Inertinite maceral 作文陆上并且东方云南的 paralic 背景被分析以便揭示 paleo 火事件和大气的氧层次在最近二叠。尽管在学习的节的 macerals 被 vitrinite 通常统治, inertinite 组完成一个可观的比例。它的内容从开始向上增加对二叠三叠纪的边界附近的煤缝接晚二叠。基于显微镜的特征和 inertinite 大部分是 paleo 火的一个副产品的占优势的理论,我们建议向上增加 inertinite 丰富在的趋势最近二叠能暗示晚二叠的 peatland 受不了经常的野火。自从点火并且烧取决于足够的氧,基于模型的计算建议 O2 层次接近 Wuchiapingian/Changhsingian 边界,二叠三叠纪的边界分别地是 27% 和 28% 。这产量把支持加到在时间的海洋、陆上的沉积做的另外的发现,并且质问为二叠三叠纪的边界危机作为机制倡导组织缺氧的理论。 | SHAO Longyi WANG Hao YU Xiaohui LU Jing ZHANG Mingquan | 2012 | Acta Geologica Sinica(English Edition)2012，86，4： | 16 |
| 2 | A GNSS Acquisition Method with the Capability of Spoofing Detection and Mitigation显示文摘For Global navigation satellite system(GNSS), spoofing attack is extremely dangerous and destructive since it can lead GNSS receivers to generate misleading time and position information. Thus, reliable and timely spoofing detection and mitigation methods are of great importance. A new GNSS acquisition method with the capability of spoofing detection and mitigation is proposed in the paper. The proposed method can not only perform acquisition, but also detect and mitigate spoofing signals based on joint consistency detection of code and carrier Dopplers. We provide performance analysis and numerical simulation results to demonstrate the validity of the proposed method when there are one or even more spoofing signals. Successful acquisition probability of the authentic signal is compared to that achieved by traditional acquisition method. The proposed method can be easily implemented with only a little modification of current receiver acquisition module. | YUAN Dingbo LI Hong WANG Fei LU Mingquan | 2018 | Chinese Journal of Electronics2018，27，1： | 13 |
| 3 | Anchor Self-Localization Algorithm Based on UWB Ranging and Inertial Measurements显示文摘Localization systems utilizing Ultra-WideBand(UWB) have been widely used in dense urban and indoor environments. A moving UWB tag can be located by ranging to fixed UWB anchors whose positions are surveyed in advance. However, manually surveying the anchors is typically a dull and time-consuming process and prone to artificial errors. In this paper, we present an accurate and easy-to-use method for UWB anchor self-localization,using the UWB ranging measurements and readings from a low-cost Inertial Measurement Unit(IMU). The locations of the anchors are automatically estimated by freely moving the tag in the environment. The method is inspired by the Simultaneous Localization And Mapping(SLAM) technique used by the robotics community. A tightly-coupled Error-State Kalman Filter(ESKF) is utilized to fuse UWB and inertial measurements, producing UWB anchor position estimates and six Degrees of Freedom(6 DoF) tag pose estimates. Simulated experiments demonstrate that our proposed method enables accurate self-localization for UWB anchors and smooth tracking of the tag. | Qin Shi Sihao Zhao Xiaowei Cui Mingquan Lu Mengdi Jia | 2019 | Tsinghua Science and Technology2019，24，6： | 11 |
| 4 | GNSS Spoofing Detection Based on Consistency Check of Velocities显示文摘Spoofing attacks for Global navigation satellite system(GNSS) would cause the abnormal changes of receiver measurements. Monitoring the abnormal changes is the main pattern of anti-spoofing techniques.Anomalies of Doppler shifts are important for GNSS spoofing detection. Most researchers focus on the consistency of Doppler such as the consistency of carrier Doppler and code rate. But the method is powerless in some cases.Doppler shift measurement is proportional to change rate of pseudorange, and the relationship would be broken in the case of spoofing attack. As both Doppler measurements and pseudoranges are related to velocity of receiver,two approaches of computing velocity can be used to check the consistency of Doppler shifts and pseudoranges measurements. An efficient spoofing detection method based on the consistency check of velocities is proposed in the paper. Principle of the method is given in detail and its performance evaluations are provided as well. Simulation results demonstrate the effectiveness of the solution. | TAO Huiqi WU Hailing LI Hong LU Mingquan | 2019 | Chinese Journal of Electronics2019，28，2： | 10 |
| 5 | Intermediate Spoofing Strategies and Countermeasures显示文摘Intermediate spoofing can impact most off-the-shelf Global Navigation Satellite Systems(GNSS)receivers,therefore low cost detection of such spoofing is very important to protect the reliability of the GNSS receivers used in critical safety and financial applications.This paper presents two strategies to analyze attacks by intermediate spoofing attackers to identify the weaknesses of such attacks.The analyses lead to a code and carrier phase consistency detection method with simulation results showing that this method can indicate the receiver when spoofing has occurred.The method can be used by most receivers,is inexpensive,and requires only a small software upgrade. | Yang Gao Hong Li Mingquan Lu Zhenming Feng | 2013 | Tsinghua Science and Technology2013，18，6： | 7 |
| 6 | Durability of neutralizing antibodies and T-cell response post SARS-CoV-2 infection显示文摘The ongoing pandemic of coronavirus disease 19(COVID-19)is caused by a newly discoveredβcoronavirus named severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).How long the adaptive immunity triggered by SARS-CoV-2 can last is of critical clinical relevance in assessing the probability of second infection and efficacy of vaccination.Here we examined,using ELISA,the IgG antibodies in serum specimens collected from 17 COVID-19 patients at 6–7 months after diagnosis and the results were compared to those from cases investigated 2 weeks to 2 months post-infection.All samples were positive for IgGs against the S-and N-proteins of SARS-CoV-2.Notably,14 samples available at 6–7 months post-infection all showed significant neutralizing activities in a pseudovirus assay,with no difference in blocking the cell-entry of the 614D and 614G variants of SARS-CoV-2.Furthermore,in 10 blood samples from cases at 6–7 months post-infection used for memory T-cell tests,we found that interferonγ-producing CD4+and CD8+cells were increased upon SARS-CoV-2 antigen stimulation.Together,these results indicate that durable anti-SARS-CoV-2 immunity is common in convalescent population,and vaccines developed from 614D variant may offer protection from the currently predominant 614D variant of SARS-CoV-2. | Yun Tan Feng Liu Xiaoguang Xu Yun Ling Weijin Huang Zhaoqin Zhu Mingquan Guo Yixiao Lin Ziyu Fu Dongguo Liang Tengfei Zhang Jian Fan Miao Xu Hongzhou Lu Saijuan Chen | 2020 | Frontiers of Medicine2020，14，6： | 6 |
| 7 | Low-complexity method for DOA estimation based on ESPRIT显示文摘A low-complexity method for direction of arrival(DOA) estimation based on estimation signal parameters via rotational invariance technique(ESPRIT) is proposed.Instead of using the cross-correlation vectors in multistage Wiener filter(MSWF),the orthogonal residual vectors obtained in conjugate gradient(CG) method span the signal subspace used by ESPRIT.The computational complexity of the proposed method is significantly reduced,since the signal subspace estimation mainly needs two matrixvector complex multiplications at the iteration of data level.Furthermore,the prior training data are not needed in the proposed method.To overcome performance degradation at low signal to noise ratio(SNR),the expanded signal subspace spanned by more basis vectors is used and simultaneously renders ESPRIT yield redundant DOAs,which can be excluded by performing ESPRIT once more using the unexpanded signal subspace.Compared with the traditional ESPRIT methods by MSWF and eigenvalue decomposition(EVD),numerical results demonstrate the satisfactory performance of the proposed method. | Xuebin Zhuang Xiaowei Cui Mingquan Lu Zhenming Feng | 2010 | Journal of Systems Engineering and Electronics2010，21，5： | 6 |
| 8 | A Robust Graph Optimization Realization of Tightly Coupled GNSS/INS Integrated Navigation System for Urban Vehicles显示文摘This paper describes a robust integrated positioning method to provide ground vehicles in urban environments with accurate and reliable localization results. The localization problem is formulated as a maximum a posteriori probability estimation and solved using graph optimization instead of Bayesian filter. Graph optimization exploits the inherent sparsity of the observation process to satisfy the real-time requirement and only updates the incremental portion of the variables with each new incoming measurement. Unlike the Extended Kalman Filter(EKF) in a typical tightly coupled Global Navigation Satellite System/Inertial Navigation System(GNSS/INS)integrated system, optimization iterates the solution for the entire trajectory. Thus, previous INS measurements may provide redundant motion constraints for satellite fault detection. With the help of data redundancy, we add a new variable that presents reliability of GNSS measurement to the original state vector for adjusting the weight of corresponding pseudorange residual and exclude faulty measurements. The proposed method is demonstrated on datasets with artificial noise, simulating a moving vehicle equipped with GNSS receiver and inertial measurement unit. Compared with the solutions obtained by the EKF with innovation filtering, the new reliability factor can indicate the satellite faults effectively and provide successful positioning despite contaminated observations. | Wei Li Xiaowei Cui Mingquan Lu | 2018 | Tsinghua Science and Technology2018，23，6： | 5 |
| 9 | Distinct immune signatures discriminate between asymptomatic and presymptomatic SARS-CoV-2^(pos)subjects显示文摘Increasing numbers of SARS-CoV-2-positive(SARS-CoV-2^(pos))subjects are detected at silent SARS-CoV-2 infection stage(SSIS).Yet,SSIS represents a poorly examined time-window wherein unknown immunity patterns may contribute to the fate determination towards persistently asymptomatic or overt disease.Here,we retrieved blood samples from 19 asymptomatic and 12 presymptomatic SARS-COV-2^(pos)subjects,47 age/gender-matched patients with mild or moderate COVID-19 and 27 normal subjects,and interrogated them with combined assays of 44-plex CyTOF,RNA-seq and Olink.Notably,both asymptomatic and presymptomatic subjects exhibited numerous readily detectable immunological alterations,while certain parameters including more severely decreased frequencies of CD107a^(low)classical monocytes,intermediate monocytes,non-classical monocytes and CD62L^(hi)CD8^(+)Tnaive cells,reduced plasma STC1 level but an increased frequency of CD4^(+)NKT cells combined to distinguish the latter.Intercorrelation analyses revealed a particular presymptomatic immunotype mainly manifesting as monocytic overactivation and differentiation blockage,a likely lymphocyte exhaustion and immunosuppression,yielding mechanistic insights into SSIS fate determination,which could potentially improve 5ARS-CoV-2 management. | Shanhe Yu Caixia Di Shijun Chen Mingquan Guo Jiayang Yan Zhaoqin Zhu Li Liu Ruixue Feng Yinyin Xie Ruihong Zhang Juan Chen Mengxi Wang Dong Wei Hai Fang Tong Yin Jinyan Huang Saijuan Chen Hongzhou Lu Jiang Zhu Jieming Qu | 2021 | Cell Research2021，31，11： | 4 |
| 10 | Numerically stable method of signal subspace estimation based on multistage Wiener filter显示文摘In this paper,a numerically stable method of signal subspace estimation based on Householder multistage Wiener filter(HMSWF) is proposed.Numerical stability of the method lies on the fact that the Householder matrix in HMSWF ensures the unitary blocking operation and significantly strengthens the orthogonality of basis vectors,especially in the finite-precision implementation.In the following,we analyze the numerical stability of HMSWF and MSWF based on the correlation subtractive structure(CSS-MSWF) by establishing the equivalence between the forward recursion of MSWF and the Arnoldi algorithm in numerical linear algebra.Besides,the equivalence between HMSWF and the Householder QR decomposition(QRD) on the Krylov matrix underlying in MSWF is directly established.Based on the relationship,two theoretical upper bounds of the orthogonality error of basis vectors in signal subspace are obtained and it is demonstrated that the orthogonality of basis vectors based on HMSWF is perfectly preserved by the numerically well-behaved Householder matrix,and the corresponding signal subspace estimation is much more numerically stable than that based on CSS-MSWF.Simulations show the numerical stability of the proposed method of signal subspace estimation by HMSWF. | ZHUANG XueBin CUI XiaoWei LU MingQuan FENG ZhenMing | 2010 | Science China(Information Sciences)2010，53，12： | 4 |
| 11 | Hybrid Method Based on Information Gain and Support Vector Machine for Gene Selection in Cancer Classi?cation显示文摘It remains a great challenge to achieve suf?cient cancer classi?cation accuracy with the entire set of genes, due to the high dimensions, small sample size, and big noise of gene expression data. We thus proposed a hybrid gene selection method, Information Gain-Support Vector Machine(IG-SVM) in this study. IG was initially employed to ?lter irrelevant and redundant genes. Then,further removal of redundant genes was performed using SVM to eliminate the noise in the datasets more effectively. Finally, the informative genes selected by IG-SVM served as the input for the LIBSVM classi?er. Compared to other related algorithms, IG-SVM showed the highest classi?cation accuracy and superior performance as evaluated using ?ve cancer gene expression datasets based on a few selected genes. As an example, IG-SVM achieved a classi?cation accuracy of 90.32% for colon cancer, which is dif?cult to be accurately classi?ed, only based on three genes including CSRP1, MYL9, and GUCA2B. | Lingyun Gao Mingquan Ye Xiaojie Lu Daobin Huang | 2017 | Genomics, Proteomics & Bioinformatics2017，15，6： | 3 |
| 12 | A NEW DIGITAL MODULATION RECOGNITION METHOD USING FEATURES EXTRACTED FROM GAR MODEL PARAMETERS显示文摘Based on the features extracted from generalized autoregressive (GAR) model parameters of the received waveform, and the use of multilayer perceptron(MLP) neural network classifier, a new digital modulation recognition method is proposed in this paper. Because of the better noise suppression ability of the GAR model and the powerful pattern classification capacity of the MLP neural network classifier, the new method can significantly improve the recognition performance in lower SNR with better robustness. To assess the performance of the new method, computer simulations are also performed. | Lu Mingquan Xiao Xianci Li Lemin (University of Electronic Science and Technology of China, Chengdu 610054) | 1999 | Journal of Electronics(China)1999，16，3： | 3 |
| 13 | Vector tracking loops in GNSS receivers for dynamic weak signals显示文摘Vehicle positioning with the global navigation satellite system(GNSS) in urban environments faces two problems which are attenuation and dynamic.For traditional GNSS receivers hardly able to track dynamic weak signals,the coupling between all visible satellite signals is ignored in the absence of navigation state feedback,and thermal noise error and dynamic stress threshold are contradictory due to non-coherent discriminators.The vector delay/frequency locked loop(VDFLL) with navigation state feedback and the joint vector tracking loop(JVTL) with coherent discriminator which is a synchronization parameter tracking loop based on maximum likelihood estimation(MLE) are proposed to improve the tracking sensitivity of GNSS receiver in dynamic weak signal environments.A joint vector position tracking loop(JVPTL) directly tracking user position and velocity is proposed to further improve tracking sensitivity.The coherent navigation parameter discriminator of JVPTL,being able to ease the contradiction between thermal noise error and dynamic stress threshold,is based on MLE according to the navigation parameter based linear model of received baseband signals.Simulation results show that JVPTL,which combines the advantages of both VDFLL and JVTL,performs better than both VDFLL and JVTL in dynamic weak signal environments. | Jing Liu Xiaowei Cui Mingquan Lu Zhenming Feng | 2013 | Journal of Systems Engineering and Electronics2013，24，3： | 2 |
| 14 | Low-complexity DOA Estimation Based on Conjugate Gradient Method显示文摘 | ZHUANG Xuebin ZHUANG Xuebin LU Mingquan LU Mingquan CUI Xiaowei CUI Xiaowei FENG Zhenming FENG Zhenming | 2009 | Chinese Journal of Electronics2009，18，4： | 2 |
| 15 | Improved zero padding method for rapid long PN-Code acquisition 显示文摘 | Hong Li Mingquan Lu Zhenming Feng | 2008 | IEEE Transactions on Signal Processing2008，56，8： | 1 |
| 16 | Du- al-folding based rapid search method for long PN-code acquisition显示文摘 | LI Hong CUI Xiaowei LU Mingquan | 2008 | Wireless Communica- tions IEEE Transactions on2008，7，12： | 1 |
| 17 | Improved zeropadding method for rapid long PN-Code acquisition 显示文摘 | Li Hong Lu Mingquan Feng Zhenming | 2008 | IEEE Transactions on Signal Processing2008，56，8： | 1 |
| 18 | Pseudocorrelationfunctionbased unambiguous tracking technique for sineBOC signals显示文摘 | YAO Zheng CUI Xiaowei LU Mingquan | 2010 | IEEE Transactions on Aerospace and Electronic Systems2010，46，4： | 1 |
| 19 | Dualfoldingbasedrapid search method for long PNcodeacquisition显示文摘 | LI Hong CUI Xiaowei LU Mingquan | 2008 | IEEETransactions on Antennas and Propagation2008，12，7： | 1 |
| 20 | Unambiguous technique for multiplexed binary offset carrier modulated signals tracking显示文摘 | Zheng Yao Lu Mingquan Feng Zhenming | 2009 | IEEE SignalProcessing Letters2009，16，7： | 1 |
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