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Olivine-norite rock detected by the lunar rover Yutu-2 likely crystallized from the SPA-impact melt pool

National Science Review 2020年第5期7卷 913-920页

作者： honglei lin Zhiping He Wei Yang Yangting lin Rui Xu Chi Zhang Meng-Hua Zhu Rui Chang Jinhai Zhang Chunlai Li Hongyu lin Yang Liu Sheng Gou Yong Wei Sen Hu Changbin Xue Jianfeng Yang Jie Zhong Xiaohui Fu Weixing Wan Yongliao Zou Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Key Laboratory of Space Active Opto-Electronics Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences State Key Laboratory of Lunar and Planetary Sciences Macau University of Science and Technology Beijing Institute of Space Mechanics and Electricity State Key Laboratory of Space Weather National Space Science CenterChinese Academy of Sciences State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Key Laboratory of Electronics and Information Technology for Space System National Space Science Center Chinese Academy of Sciences Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Institute of Optics and Electronics Chinese Academy of Sciences Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong University

Chang’E-4 landed in the South Pole-Aitken (SPA) basin,providing a unique chance to probe the composition of the lunar *** landing site is located on ejecta strips in Von Karman crater that possibly originate from the neighboring Finsen crater.A surface rock and the lunar regolith at 10 sites along the rover Yutu-2 track were measured by the onboard Visible and Near-Infrared Imaging Spectrometer in the first three lunar days of mission *** situ spectra of the regolith have peak band positions at 1and 2μm,similar to the spectral data of Finsen ejecta from the Moon Mineralogy Mapper,which confirms that the regolith’s composition of the landing area is mostly similar to that of Finsen *** rock spectrum shows similar band peak positions,but stronger absorptions,suggesting relatively fresh *** rock may consist of 38.1±5.4%low-Ca pyroxene,13.9±5.1%olivine and 48.0±3.1%plagioclase,referred to as *** plagioclase-abundant and olivine-poor modal composition of the rock is inconsistent with the origin of the mantle,but representative of the lunar lower ***,the rock crystallized from the impact-derived melt pool formed by the SPA-impact event via mixing the lunar crust and mantle *** scenario is consistent with fast-cooling thermal conditions of a shallow melt pool,indicated by the fine to medium-sized texture (<3 mm) of the rock and the SPA-impact melting model[Icarus2012;220:730-43].

关键词： impact basin lunar interior composition visible and near-infrared spectra lunar rover Yutu-2 Chang’E-4 mission

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Distributed CI Fusion Estimation for Non-uniform Sampling Systems with Fading Measurements

Distributed CI Fusion Estimation for Non-uniform Sampling Sy...

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第37届中国控制会议

作者： lin honglei SUN Shuli Department of Automation Heilongjiang University

This paper is concerned with the state estimation problem for non-uniform sampling systems subject to fading measurements. The concerned non-uniform sampling system is that the state is updated uniformly and the measurements are sampled randomly. Moreover, the fading measurement phenomena may occur in different sensor measurement channels where the independent random variables obeying different certain probability distributions over different known intervals are employed to describe this phenomena. Firstly, a state space model is established to depict the dynamics at the measurement sampling points within a state update period. Then, based on single sensor measurements, a non-augmented state estimator is proposed by applying an innovation analysis approach. Finally, a distributed suboptimal fusion estimator is proposed for the multi-sensor case based on the covariance intersection fusion algorithm. It has good robustness and reduced computational cost since it has a parallel structure and avoids calculation of cross-covariance matrices between any two local estimators. The simulation research verifies the effectiveness of the proposed estimation algorithms.

关键词： non-augmented estimator innovation analysis approach covariance intersection fusion non-uniform sampling fading measurement

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Sequential Inverse Covariance Intersection Fusion Estimation for Non-uniform Sampling Systems with Fading Measurements

Sequential Inverse Covariance Intersection Fusion Estimation...

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第三十九届中国控制会议

作者： lin honglei SUN Shuli Department of Automation Heilongjiang University

This paper is concerned with the state estimation problem for non-uniform sampling systems subject to fading *** concerned non-uniform sampling scheme is that the state is updated uniformly and the measurements are sampled ***,the fading measurement phenomena may occur in different sensor measurement channels where the independent random variables obeying different certain probability distributions over different known intervals are employed to describe this ***,a new state space model is established to depict the dynamics at the measurement sampling points within a state update ***,based on single sensor measurements,the non-augmented state estimator is proposed by applying an innovation analysis ***,the sequential inverse covariance intersection fusion estimation algorithm is proposed for the multi-sensor *** simulation research verifies the effectiveness of the proposed estimation algorithms.

关键词： non-augmented estimator innovation analysis approach inverse covariance intersection non-uniform sampling fading measurement

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Distributed Fusion Estimation for Multi-sensor Non-uniform Sampling Systems with Correlated Noises and Packet Dropouts

Distributed Fusion Estimation for Multi-sensor Non-uniform S...

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第36届中国控制会议

作者： lin honglei SUN Shuli Department of Automation Heilongjiang University

In this paper,an optimal distributed fusion estimation algorithm is presented for multi-sensor non-uniform sampling systems with the correlated process noise and measurement noises at the same time and network-induced packet ***,the non-uniform sampling problem is first transformed to a single-rate synchronous sampling ***,local optimal filters and the filtering error cross-covariance matrices between any two local filters are ***,the optimal distributed fusion filter is presented by using the matrix-weighted fusion algorithm in the linear minimum variance *** results show the effectiveness of the proposed fusion approach.

关键词： Distributed fusion estimation non-uniform sampling multi-sensor system correlated noise packet dropout

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Fusion Filtering for Stochastic Systems with Correlated Noises and Deception Attacks

Fusion Filtering for Stochastic Systems with Correlated Nois...

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第40届中国控制会议

作者： Tian Tian Shuli Sun honglei lin Department of Automation Heilongjiang University

This paper is concerned with fusion filtering problem for a class of stochastic systems subject to both correlated noises and deception *** system noise and measurement noises of different sensors are cross-correlated at the same time *** the data transmission over network,the deception attack signals are injected randomly,whose statues are described by a group of Bernoulli *** centralized fusion filter is proposed via an innovation analysis *** order to improve robustness and reduce computational burden,a distributed fusion filter is put forward by using matrix-weighted fusion estimation algorithm in the linear unbiased minimum variance sense.A simulation example is given to show the effectiveness of the proposed algorithms.

关键词： optimal filtering correlated noises deception attacks distributed filtering innovation analysis approach

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Mitigating Lattice Distortion of High‑Voltage LiCoO_(2)via Core‑Shell Structure Induced by Cationic Heterogeneous Co‑Doping for Lithium‑Ion Batteries

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Nano-Micro Letters 2024年第3期16卷 169-182页

作者： Zezhou lin Ke Fan Tiancheng Liu Zhihang Xu Gao Chen honglei Zhang Hao Li Xuyun Guo Xi Zhang Ye Zhu Peiyu Hou Haitao Huang Department of Applied Physics and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China Department of Applied Physics The Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China Institute of Nanosurface Science and Engineering Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics EngineeringShenzhen UniversityShenzhenPeople’s Republic of China School of Physics and Technology University of JinanJinanShandongPeople’s Republic of China

Inactive elemental doping is commonly used to improve the structural stability of high-voltage layered transition-metal oxide ***,the one-step co-doping strategy usually results in small grain size since the low diffusivity ions such as Ti^(4+)will be concentrated on grain boundaries,which hinders the grain *** order to synthesize large single-crystal layered oxide cathodes,considering the different diffusivities of different dopant ions,we propose a simple two-step multi-element co-doping strategy to fabricate core–shell structured LiCoO_(2)(CS-LCO).In the current work,the high-diffusivity Al^(3+)/Mg^(2+)ions occupy the core of single-crystal grain while the low diffusivity Ti^(4+)ions enrich the shell *** Ti^(4+)-enriched shell layer(~12 nm)with Co/Ti substitution and stronger Ti–O bond gives rise to less oxygen ligand ***-situ XRD demonstrates the constrained contraction of c-axis lattice parameter and mitigated structural *** a high upper cut-off voltage of 4.6 V,the single-crystal CS-LCO maintains a reversible capacity of 159.8 mAh g^(−1)with a good retention of~89%after 300 cycles,and reaches a high specific capacity of 163.8 mAh g^(−1)at *** proposed strategy can be extended to other pairs of low-(Zr^(4+),Ta^(5+),and W6+,etc.)and high-diffusivity cations(Zn^(2+),Ni^(2+),and Fe^(3+),etc.)for rational design of advanced layered oxide core–shell structured cathodes for lithium-ion batteries.

关键词： Lithium-ion battery LiCoO_(2) Heterogeneous co-doping Core-shell structure High-voltage stability

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基于单次散射反照率的矿物高光谱稀疏解混

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遥感学报 2016年第1期20卷 53-61页

作者：林红磊张霞孙艳丽中国科学院遥感与数字地球研究所遥感科学国家重点实验室北京100101 中国科学院大学北京100049

矿物的混合多属于致密型混合,在可见光—短波红外波段的混合呈现非线性特征,同时由于矿物混合的复杂性以及图像中完全纯净的像元可能不存在等原因,使得从图像上提取端元具有较大不确定性。本文根据矿物单次散射反照率的线性可加性,提出... 详细信息

矿物的混合多属于致密型混合,在可见光—短波红外波段的混合呈现非线性特征,同时由于矿物混合的复杂性以及图像中完全纯净的像元可能不存在等原因,使得从图像上提取端元具有较大不确定性。本文根据矿物单次散射反照率的线性可加性,提出一种基于矿物单次散射反照率光谱库的稀疏解混算法,利用Hapke模型将矿物反射率转换成矿物单次散射反照率,构建矿物单次散射反照率光谱库,以半监督的方式通过稀疏回归的方法从光谱库中寻找最优端元组合,并估算混合像元中各端元的丰度。利用RELAB矿物混合光谱库进行算法验证,结果表明,丰度反演的平均绝对误差为3.12%;将本文方法应用于美国内华达州铜矿区的AVIRIS高光谱图像数据,所得丰度图与美国地质勘探局USGS矿物识别结果具有较好的一致性。本文算法不需要从图像提取端元,并且考虑到了矿物的非线性混合特征,能够得到较高的反演精度,在近地行星和卫星表面岩矿成分的探测等领域具有较好的应用前景。

关键词：光谱解混 Hapke模型稀疏回归光谱库单次散射反照率

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GNSS Carrier Tracking via a Variational Bayesian Adaptive Kalman Filter for High Dynamic Conditions

GNSS Carrier Tracking via a Variational Bayesian Adaptive Ka...

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第十四届中国卫星导航年会

作者： Song Li Chunjiang Ma Pengcheng Ma honglei lin Xiaomei Tang Feixue Wang National University of Defense Technology

Under high dynamic conditions,a robust carrier tracking approach is essential for global navigation satellite system(GNSS) *** this paper,the powerful Kalman filter(KF) technique is adopted in GNSS carrier *** correlation signals are used as system measurements to discard the discriminator restricted by linear ***,a linear measurement equation is established based on the error-state,so that the system model is *** the KF can be used instead of the nonlinear KF which requires more computational ***,to exploit the potential of the KF under different conditions,an adaptive KF(AKF) based on the variational Bayesian approach is *** proposed filter has accurate and robust estimation performance,especially under high dynamic *** results verify the applicability of the proposed system model and the superiority of the proposed filter compared with the traditional KF and existing AKFs.

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适用于GPU处理的长更新周期卫星导航信号载波相位跟踪环路

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国防科技大学学报 2023年第5期45卷 95-104页

作者：肖志斌鲁祖坤林红磊黄龙国防科技大学电子科学学院湖南长沙410073

针对短环路更新间隔下GPU处理效率受限而长更新间隔下传统跟踪环路在高动态场景下不稳健的这一矛盾,提出一种可适应高动态场景的长更新间隔载波相位跟踪算法,该算法设计了一种低复杂度线性调频信号参数估计方法,实现跟踪初始阶段多普勒... 详细信息

针对短环路更新间隔下GPU处理效率受限而长更新间隔下传统跟踪环路在高动态场景下不稳健的这一矛盾,提出一种可适应高动态场景的长更新间隔载波相位跟踪算法,该算法设计了一种低复杂度线性调频信号参数估计方法,实现跟踪初始阶段多普勒及变化率的精确估计进而消除大部分信号动态,在跟踪过程中采用4阶卡尔曼滤波对残余信号相位及动态进行精细跟踪。经仿真验证,200 ms更新间隔下,可实现多普勒一次/二次变化率分别达800 Hz/s、64 Hz/s2正弦运动场景下载波相位的快速稳定跟踪,1次更新即可收敛,跟踪灵敏度低至23 d B-Hz,相位跟踪精度远优于传统3阶锁相环路。

关键词：载波相位跟踪线性调频信号卡尔曼滤波高动态

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《国家珍贵古籍名录》中少数民族文字古籍定量分析

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河南图书馆学刊 2021年第2期41卷 112-113,117页

作者：林宏磊新疆师范大学图书馆新疆乌鲁木齐830054

2008年至2020年,我国公布了六批《国家珍贵古籍名录》,共有1,132部少数民族文字古籍入选。文章对入选《国家珍贵古籍名录》的少数民族文字古籍的文种、版本、收藏机构等情况进行了定量分析,就少数民族文字古籍发掘不充分、民间开发力度... 详细信息

2008年至2020年,我国公布了六批《国家珍贵古籍名录》,共有1,132部少数民族文字古籍入选。文章对入选《国家珍贵古籍名录》的少数民族文字古籍的文种、版本、收藏机构等情况进行了定量分析,就少数民族文字古籍发掘不充分、民间开发力度不够、保护措施欠缺、专业人才缺乏等问题提出了相应的建议。

关键词：《国家珍贵古籍名录》少数民族文字古籍定量分析

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