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| 1 | Planning and Decision-making for Connected Autonomous Vehicles at Road Intersections:A Review显示文摘Planning and decision-making technology at intersections is a comprehensive research problem in intelligent transportation systems due to the uncertainties caused by a variety of traffic participants.As wireless communication advances,vehicle infrastructure integrated algorithms designed for intersection planning and decision-making have received increasing attention.In this paper,the recent studies on the planning and decision-making technologies at intersections are primarily overviewed.The general planning and decision-making approaches are presented,which include graph-based approach,prediction base approach,optimization-based approach and machine learning based approach.Since connected autonomous vehicles(CAVs)is the future direction for the automated driving area,we summarized the evolving planning and decision-making methods based on vehicle infrastructure cooperative technologies.Both four-way signalized and unsignalized intersection(s)are investigated under purely automated driving traffic and mixed traffic.The study benefit from current strategies,protocols,and simulation tools to help researchers identify the presented approaches’challenges and determine the research gaps,and several remaining possible research problems that need to be solved in the future. | Shen Li Keqi Shu Chaoyi Chen Dongpu Cao | 2021 | Chinese Journal of Mechanical Engineering2021，34，5： | 5 |
| 2 | Research on Telescope TTL Coupling Noise in Intersatellite Laser Interferometry显示文摘The detection mission of gravitational waves in space is that the accuracy of the long-baseline intersatellite laser interferometry on the million-kilometer order needs to reach the order of 8 pm/Hz.Among all noise sources that affect the interferometry accuracy,tilt-to-length(TTL)coupling noise is the second largest source of noise after shot noise.This paper focuses on studying the contribution of TTL coupling noise of the telescope system in the intersatellite scientific interferometer.By referring to the laser interferometer space antenna(LISA)’s noise budget,TTL coupling noise is required to be within±25μm/rad(±300μrad).Therefore,this paper focuses on studying both the mechanism of TTL coupling noise due to the noise sources of the telescope and the method of suppressing the TTL noise,which can lay a foundation for noise distribution and the development of engineering prototypes in subsequent tasks. | Zhi WANG Tao YU Ya ZHAO Ziren LUO Wei SHA Chao FANG Yukun WANG Shaoxin WANG Keqi QI Yongxian WANG Xuanwen XU | 2020 | Photonic Sensors2020，10，3： | 5 |
| 3 | Size,morphology,and composition of lunar samples returned by Chang'E-5 mission显示文摘This study focuses on the physical and chemical properties of surficial lunar regolith(LR)samples returned from the Moon by the Chang’E-5(CE-5)mission.Insights regarding the effect of a new sampling geological site on the surficial lunar sample CE5 C0400 were illustrated using nondestructive techniques such as laser diffractometry coupled with image analysis,X-ray computed tomography,and field emission scanning electron microscopy equipped with energy dispersive spectroscopy,and Xray diffraction combined with Rietveld refinement.From the characterization analyses,the CE-5 sampling site in the northeastern Oceanus Procellarum on the Moon yields a unique collection of relatively regular-shaped and fine basalt-dominated particles.The median grain size D_(50) is(55.24±0.96)μm,falling within the relatively low end of the range of the Apollo lunar returned samples.The coefficient of uniformity C_(u)of 15.1 and the coefficient of curvature C_(c)of 1.7 could classify CE5 C0400 to be well-graded.The minerals in CE5 C0400 comprise approximately 44.5%pyroxene,30.4%plagioclase,3.6%olivine,and6.0%ilmenite.There is a relatively low content of approximately 15.5%glass phase in the CE-5 lunar sample.From the results,we deduce that the CE-5 LR structure could have mainly resulted from micrometeoroid impacts to achieve such a high level of maturity. | Hui Zhang Xian Zhang Guang Zhang Keqi Dong Xiangjin Deng Xiaosong Gao Yaodong Yang Yuan Xiao Xiao Bai Kaixin Liang Yiwei Liu Wenbin Ma Shaofan Zhao Ce Zhang Xiaojing Zhang Jian Song Wei Yao Hong Chen Weihua Wang Zhigang Zou Mengfei Yang | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，2： | 4 |
| 4 | Brassinosteroids mediate the effect of high temperature during anthesis on the pistil activity of photo-thermosensitive genetic male-sterile rice lines显示文摘Brassinosteroids(BRs)play critical roles in a wide range of plant developmental processes.However,it is unknown whether and how BRs mediate the effect of high temperature(HT)stress during anthesis on the pistil activity of photo-thermosensitive genetic male-sterile(PTSGMS)rice(Oryza sativa L.)lines.This study investigated the question.Three pot-grown PTSGMS rice lines were subjected to HT stress during anthesis.The contents of 24-epibrassinolide(24-EBL)and 28-homobrassinolide(28-HBL),the major forms of BR in rice plants,and levels of reactive oxygen species(ROS)or antioxidants(AOS),hydrogen peroxide(H2O2),1-aminocylopropane-1-carboxylic acid(ACC),ascorbic acid(AsA),and catalase activity in pistils,were determined.HT stress significantly reduced the contents of both 24-EBL and 28-EBL relative to those under normal temperatures,but the reduction varied by PTSGMS line.A line with higher BR contents under HT stress showed lower contents of ACC and H2O2,higher catalase activity and AsA content in pistils,and higher fertilization rate,seed-setting rate,and seed yield when the line was crossed with a restorer line,indicating that higher levels of BRs increase HT stress resistance.Applying 24-EBL,28-HBL or an inhibitor of BR biosynthesis confirmed the roles of BRs in response to HT stress.The results suggest that BRs mediate the effect of HT stress on pistil activity during anthesis and alleviate the harm of HT stress by increasing AOS and suppressing ROS generation. | Jing Chen Keqi Fei Weiyang Zhang Zhiqin Wang Jianhua Zhang | 2021 | The Crop Journal2021，9，1： | 4 |
| 5 | Aerodynamic Noise Propagation Simulation using Immersed Boundary Method and Finite Volume Optimized Prefactored Compact Scheme显示文摘把方法(IBM ) 和有限体积基于沉浸的边界优化因素 pre 的协议(FVOPC ) 计划,噪音繁殖在内并且在一把错流扇子的套外面的数字模拟被建立。不稳定的线性化的 Euler 方程被解决直接模仿飞行器声学的地。为了验证 FVOPC,策划,一个模拟盒子:一个维的线性波浪繁殖问题用 FVOPC 计划, DRP 计划和 hoc 计划被执行。FVOPC 的结果在对分析答案的好同意,它比 DRP 和 hoc 计划的结果好。FVOPC 比 DRP 和 hoc 计划是更少的分散和驱散。然后,噪音繁殖问题的数字模拟被执行。36 紧缩的旋转噪音来源的噪音地与 1000r/min 的旋转速度被获得。吸收边界状况的 PML 为压抑数字思考被用于健全的远地边界条件。墙边界状况被用于套。结果证明在这块地里套墙和声波干扰上有思考。有 IBM 的 FVOPC 对在为压抑分散和驱散的复杂几何学下面的噪音繁殖问题合适,并且也把高顺序作为精确。 | Min LIU Keqi WU | 2008 | Journal of Thermal Science2008，17，4： | 3 |
| 6 | 基于前后向拟合的色谱重叠峰分峰方法显示文摘针对色谱峰重叠导致定量分析误差大的问题,提出了基于前后向拟合的色谱重叠峰分离方法。通过多次前后向拟合迭代,不断逼近第一个单峰的前沿和第二个单峰的后沿,当计算误差达到设定值时停止迭代;再根据色谱重叠峰相似性原理,分别得到第一个单峰的后沿和第二个单峰的前沿,此时重叠峰即被分离为两个单峰。为了验证前后向拟合算法的有效性,设计了不同重叠程度的色谱峰分离仿真实验,并采用气相色谱-质谱法实测对二甲苯和间二甲苯的分离,并与常规的垂线法、交点垂线法、比例分配法的计算误差进行对比。结果表明,常规方法的最大误差达到29.92%,而前后向拟合方法则可以将误差稳定在1.8%范围内,具有一定的定量分析优势。 | 高文清 张俊良 王艳 刘蔓 Hu JunJack 俞建成 Tang keqi | 2018 | 质谱学报2018，39，5： | 3 |
| 7 | A novel NIRS modelling method with OPLS-SPA and MIX-PLS for timber evaluation显示文摘The identification of timber properties is important for safe application.Near Infrared Spectroscopy(NIRS)technology is widely-used because of its simplicity,efficiency,and positive environmental attributes.However,in its application,weak signals are extracted from complex,overlapping and changing information.This study focused on the stability of NIR modeling.The Orthogonal Partial Least Squares(OPLS)and Successive Projections Algorithm(SPA)eliminates noise and extracts effective spectra,and an ensemble learning method MIX-PLS,is applied to establish the model.The elastic modulus of timber is taken as an example,and 201 wood samples of three species,Xylosmacongesta(Lour.)Merr.,Acer pictum subsp.mono,and Betula pendula,samples were divided into three groups to investigate modelling performance.The results show that OPLS can preprocess the near-infrared spectroscopy information according to the target object in the face of the system error and reduce errors to minimum.SPA finally selects 13 spectral bands,simplifies the NIR spectral data and improves model accuracy.The Pearson's correlation coefficient of Calibration(Rc)and the Pearson's correlation coefficient of Prediction(Rp)of Mix Partial Least Squares(MIX-PLS)were 0.95 and 0.90,and Root Mean Square Error of Calibration(RMSEC)and Root Mean Square Error of Prediction(RMSEP)are 2.075 and 6.001,respectively,which shows the model has good generalization abilities. | Jinhao Chen Huilig Yu Dapeng Jiang Yizhuo Zhang Keqi Wang | 2022 | Journal of Forestry Research2022，33，1： | 2 |
| 8 | Groundwater net discharge rates estimated from lake level change in Badain Jaran Desert, Northwest China显示文摘Over a hundred sizable lakes,some even larger than^1 km2,are distributed across the lowlands between megadunes in the southeastern Badain Jaran Desert(BJD),northwest China.With rather limited precipitation and hardly any surface runoff,these lakes are fed mainly by groundwater.However,the source of the groundwater and the groundwater discharge rates to these lakes are poorly understood.Water level and temperature of four representative lakes in the southeastern BJD were monitored continuously between 2013 and 2017.Water surface evaporation and rainfall in this area were also measured.Combining these acquired data,groundwater discharge rates were estimated using water balance models.The results show that the four lakes have similar recharge and discharge patterns,but at different average net groundwater discharge rates ranging from 1.79 to 3.09 mm d?1.The lake level variation mainly depends on groundwater discharge and lake surface evaporation.We found that diurnal lake level variation may be controlled by earth tide and atmospheric pressure change,and is five times greater than the evaporation.The desert precipitation and deep confined groundwater with high temperature were found also recharging the desert lakes.An Empirical Mode Decomposition(EMD)method was used to identify the lake level trend.All lake levels increased over the last four years,except one decreased in 2015 and 2016.The lake levels’increasing trend is synchronously similar with the precipitation in north China.This study analyzes annual and seasonal lake level variations,and also finds the diurnal water cycle between the groundwater and lake water for the first time. | Xingfan WANG Hui ZHAO Yongwei SHENG Jianwei GENG Keqi WANG Hongyu YANG | 2020 | Science China Earth Sciences2020，63，5： | 2 |
| 9 | Hurricane-induced beach change derived from airborne laser measurements near Panama City, Florida显示文摘 | William Robertson V Zhang Keqi Whitman Dean | 2007 | Marine Geology2007，237，： | 1 |
| 10 | Purification, antitumor and antioxidant activities in vitro of polysaccharides from the brown seaweed Sargassum pallidum显示文摘 | Hong Ye Keqi Wang Chunhong Zhou Jun Liu Xiaoxiong Zeng | 2008 | Food Chemistry2008，，2： | 1 |
| 11 | Numerical simulation and modification of 3D flow phenomena in axial flow fan显示文摘 | Elhadi E E Wu Keqi | 2003 | TASK Quarterly2003，7，2： | 1 |
| 12 | A Progressive Morphological Filter for Removing Nonground Measurements From Airborne Lidar Data显示文摘 | Zhang Keqi Shuching Chen | 2003 | IEEE Transactions on Geoscience and Remote Sensing2003，41，4： | 1 |
| 13 | Global Warming and Coastal Erosion显示文摘 | Keqi Zhang Bruce C Douglas Stephen P Lentherman | 2004 | Climatic Change2004，64，： | 1 |
| 14 | A Progressive Morphological Filter for Removing Nonground Measurements from Airborne LiDAR Data显示文摘 | Zhang Keqi Chen Shuching Whitman D | 2003 | IEEE Transaction on Geoscience and Remote Sensing2003，41，4： | 1 |
| 15 | The Unsteady Fluctuating Pressure and Velocity in a Cross Flow Fan显示文摘这篇论文在为一把新奇错流扇子与一个噪音实验获得的远地里借助于数字方法和健全压力调查在来源的波动的压力和速度之间的关系。在一把错流扇子的波动的压力和速度的频率特征被分析借助于光谱分析和小浪变换。大旋涡模拟在套墙上获得的波动的压力与实验的相比并且显示出好同意。从光谱健全来源的分析,波动的压力达到顶点,这被发现在远地里与健全压力相应。 | Jiaye Gan Fei Liu Min Liu Keqi Wu | 2008 | Journal of Thermal Science2008，17，4： | 1 |
| 16 | A progressive morphological filter for removing nonground measurements from airborne LIDAR data显示文摘 | Zhang Keqi Chen Shu-Ching Whitman D | 2003 | IEEE Transactions on Geosciences and Remote Sensing2003，41，4： | 1 |
| 17 | A progressive morphological filter for removing nonground measurements form airborne LIDAR data显示文摘 | Keqi Zhang Shu-Ching Chen | 2003 | IEEE Trans on Geosciences and Remote Sensing2003，41，87： | 1 |
| 18 | Global warming and coastal erosion显示文摘 | ZHANG KEQI DOUGLAS B C LEATHERMAN S P | 2004 | Climatic Change2004，64，： | 1 |
| 19 | Global Warming and Coastal Erosion显示文摘 | Keqi Zhang Bruce C. Douglas Stephen P. Leatherman | 2004 | Climatic Change (-)2004，，1： | 1 |
| 20 | Purification, antitumor and antioxidant activities in vitro of polysaccharidesfrom the brown seaweed sargassum pallidum显示文摘 | Hong Ye Keqi Wang Chunhong Zhou | 2008 | Food Chemistry2008，111，2： | 1 |
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