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认知空间映射及其神经机制

心理科学进展 2025年第1期33卷 62-76页

作者：吴际李会杰南宁师范大学教育科学学院南宁530001 中国科学院行为科学重点实验室(中国科学院心理研究所) 北京100101 中国科学院大学心理学系北京100049

认知地图不仅可以映射物理空间,还可以支持认知空间映射,形成包括感知空间、情景记忆空间、概念空间和社会空间等在内的跨不同信息领域的地图式表征。认知空间映射的神经机制包括海马体对潜在结构的抽象和概括、支持分布式位置地图的生... 详细信息

认知地图不仅可以映射物理空间,还可以支持认知空间映射,形成包括感知空间、情景记忆空间、概念空间和社会空间等在内的跨不同信息领域的地图式表征。认知空间映射的神经机制包括海马体对潜在结构的抽象和概括、支持分布式位置地图的生成、将信息与背景结构捆绑,以及海马体与其它脑区的协同。未来研究应关注预测性的认知空间地图、海马体对不同精度和层级信息的表征、认知空间映射微观和介观层面的研究空缺以及物理空间和认知空间映射的共同机制和特异性机制等问题。

关键词：认知地图网格细胞位置细胞海马体

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Genetic diversity and its seasonal variation of jiaozhou Bay phytoplankton determined by rbcL gene sequencing

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Acta Oceanologica Sinica 2006年第2期25卷 125-134页

作者： LIU Yongjian YANG Guanpin* GUAN Xiaojing MEN rongxin College of Marine Life Sciences Ocean University of ChinaQingdao 266003China

Ribulose-1, 5-bisphosphate carboxynase/oxygenase large subunit gene (rbcL) of jiaozhou Bay phytoplankton was amplified from spring, summer and autumn surface seawater DNAs and cloned respectively. About 50 clones were randomly selected from each library and sequenced. If identical amino acid sequences are considered as the same operational taxonomy unit (OTU), 61 OTUs are identified according to inferred amino acid sequences, among them, 21 from spring seawater, 15 from summer seawater and 25 from autumn seawater. Shannon index calculated from OTU abundances reflects the genetic diversity of a community. The indexes of spring, summer and autumn surface seawater phytoplankton are 2.69, 2.44 and 2.76 respectively, indicating that phytoplankton genetic diversity of autumn seawater is the richest. Seasonal variation ofphytoplankton community is significant; the community compositions of three seasons are almost completely different except for the two OTUs shared by summer and autumn. Surface seawater phytoplankton communities are possibly metacommunities different spatially and temporally.

关键词： phytoplankton ribulose-1, 5-bisphosphate carboxynase/oxygenase large subunit gene (rbcL) community structure seasonal variation

Long-term adaptive informative path planning for scalar field monitoring using cross-entropy optimization

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Science China(Information Sciences) 2019年第5期62卷 26-28页

作者： Yang LI rongxin CUI Weisheng YAN Demin XU Research & Development Institute of Northwestern Polytechnical University in Shenzhen School of Marine Science and Technology Northwestern Polytechnical University

Dear editor,Robots are extensively used in various civil and military applications [1, 2]. In the last decade, informative path planning (IPP) has been one of the most important research areas in modern robot engineer... 详细信息

关键词： Long-term adaptive informative path planning for scalar field monitoring using cross-entropy optimization exp length

Molecular mechanisms of hybrid sterility in rice

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Science China(Life Sciences) 2019年第6期62卷 737-743页

作者： Yongyao Xie rongxin Shen Letian Chen Yao-Guang Liu State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources South China Agricultural University Guangzhou 510642 China Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms South China Agricultural University Guangzhou 510642 China Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Provincial Higher Education Institutions South China Agricultural University Guangzhou 510642 China College of Life Sciences South China Agricultural University Guangzhou 510642 China Received February

Hybrid sterility presents a major bottleneck in hybrid crop breeding and causes postzygotic reproductive isolation in ***, we summarize the current understanding of the genetics of rice hybrid sterility and highlight new advances in deciphering the molecular basis of the major genetic loci for hybrid sterility in rice. We also discuss practical strategies for overcoming reproductive barriers to utilize hybrid vigor in inter-specific and inter-subspecific hybrid rice breeding.

关键词： speciation reproductive isolation heterosis hybrid sterility rice

Antenna Selection in Energy Harvesting Relaying Networks Using Q-Learning Algorithm

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China Communications 2021年第4期18卷 64-75页

作者： Daliang Ouyang Rui Zhao Yuanjian Li rongxin Guo Yi Wang College of Information Science and Engineering Huaqiao UniversityXiamen 361021China Centre for Telecommunications Research King’s College LondonLondon WC2R 2LSU.K. School of Electronics and Communication Engineering Zhengzhou University of AeronauticsZhengzhou 450046China China National Digital Switching System Engineering and Technological Research Center Zhengzhou 450002China

In this paper,a novel opportunistic scheduling(OS)scheme with antenna selection(AS)for the energy harvesting(EH)cooperative communication system where the relay can harvest energy from the source transmission is *** this considered scheme,we take into both traditional mathematical analysis and reinforcement learning(RL)scenarios with the power splitting(PS)factor *** the case of traditional mathematical analysis of a fixed-PS factor,we derive an exact closed-form expressions for the ergodic capacity and outage probability in general signal-to-noise ratio(SNR)***,we combine the optimal PS factor with performance metrics to achieve the optimal transmission ***,based on the optimized PS factor,a RL technique called as Q-learning(QL)algorithm is proposed to derive the optimal antenna selection *** highlight the performance advantage of the proposed QL with training the received SNR at the destination,we also examine the scenario of QL scheme with training channel between the relay and the *** results illustrate that,the optimized scheme is always superior to the fixed-PS factor *** addition,a better system parameter setting with QL significantly outperforms the traditional mathematical analysis scheme.

关键词： Q-learning optimal PS factor outage probability ergodic capacity antenna selection

Correlation mechanism of friction behavior and topological properties of the contact network during powder compaction

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Particuology 2023年第11期82卷 98-110页

作者： Wei Zhang Chuanniu Yuan Shuai Zhang Weijian Xiao Ning Zhang rongxin Chen School of Mechanical and Automotive Engineering Fujian University of TechnologyFuzhou350118China

The effect of friction behavior on the compacted density is significant, but the relationship between the topological properties of the contact network and friction behavior during powder compaction remains unclear. Based on the discrete element method (DEM), a DEM model for die compaction was established, and the Hertz contact model was modified into an elastoplastic contact model that was more suitable for metal-powder compaction. The evolution of the topological properties of the contact network and its mechanism during powder compaction was explored using the elastoplastic contact model. The results demonstrate that the friction behavior between the particles is closely related to the topological properties of the contact network. Side wall friction results in smaller clustering coefficient (CC) and excess contact (EC) in the lower region near the side wall. Corresponding to this phenomenon, the upper region near the side wall has more high-stress particles when the major principal stress threshold was considered, and the CC and EC are significantly higher than those in the other regions. This study provides a theoretical basis for improving powder compaction behavior.

关键词： Powdercompaction Granularmatter Discrete element method Topological property Friction behavior

Modified homogeneous parameterization for monocular SLAM

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High Technology Letters 2012年第3期18卷 238-242页

作者：孟旭炯 jiang rongxin Chen Yaowu The Institute of Advanced Digital Technologies&Instrumentation Zhejiang UniversityHangzhou 310027P.R.China

Feature initialization is an important issue in the monocular simultaneous locahzation ana mapping （SLAM） literature as the feature depth can not be obtained at one observation. In this paper, we present a new feature initialization method named modified homogeneous parameterization （MHP）, which allows undelayed initialization with scale invariant representation of point features located at various depths. The linearization error of the measurement equation is quantified using a depth estimation model and the feature initialization process is described. In order to verify the performance of the proposed method, the simulation is carried out. Results show that with the proposed method, the SLAM algorithm can achieve better consistency as compared with the existing inverse depth parameterization （IDP） method.

关键词： monocular simultaneous localization and mapping (SLAM) feature initialization depth estimation homogeneous coordinates extended Kahnan filter

Synthesis of high-purity mesoporous nanosilica microspheres from retired composite insulators based on orthogonal experiment

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High Voltage 2022年第6期7卷 1111-1122页

作者： rongxin Chen Li Cheng Yunfan Liu Liang Yu Ruijin Liao Tingting Wang School of Electrical Engineering Chongqing UniversityChongqingChina State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing UniversityChongqingChina Electric Power Research Institute of China Southern Power Grid GuangzhouGuangdong ProvinceChina

Silicone rubber is an indispensable insulation material for power equipment and is difficult to degrade naturally,posing a serious threat to the *** remains challenging to dispose this alarming amount of *** our previous research,a green pyrolysis recycling method was proposed for waste composite *** this article,the experimental device was further improved,and the recycling process was optimised by orthogonal experiments to obtain nanosilica microspheres(NSMs)with higher purity and controllable particle size for the state-of-the-art engineering ***,the effect of three factors(calcination temperature,constant-temperature duration,and heating rate)on the particle size of NSMs were investigated by single-factor *** and response analyses were then used to examine the goodness of fit of the multi-parameter fitting equation and the interaction impact of multiple factors on the particle ***,homogeneous mesoporous NSMs with higher purity(increased from 97%to 99%)and smaller particle size(decreased from 160 to 103 nm were prepared under the guidance of *** SiO_(2)-recovery rate of this method was 74.7%,revealing superior economic value.

关键词： purity silica insulator

A hierarchical byzantine fault tolerance consensus protocol for the Internet of Things

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High-Confidence Computing

High-Confidence Computing 2024年第3期4卷 13-24页

作者： rongxin Guo Zhenping Guo Zerui Lin Wenxian jiang College of Engineering Huaqiao UniversityQuanzhou 362000China College of Computer Science and Technology Huaqiao UniversityXiamen 361021China

The inefficiency of Consensus protocols is a significant impediment to blockchain and IoT convergence *** solve the problems like inefficiency and poor dynamics of the Practical Byzantine Fault Tolerance(PBFT)in IoT scenarios,a hierarchical consensus protocol called DCBFT is *** all,we propose an improved k-sums algorithm to build a two-level consensus cluster,achieving an hierarchical management for IoT ***,A scalable two-level consensus protocol is proposed,which uses a multi-primary node mechanism to solve the single-point-of-failure *** addition,a data synchronization process is introduced to ensure the consistency of block data after view ***,A dynamic reputation evaluation model is introduced to update the nodes’reputation values and complete the rotation of consensus nodes at the end of each consensus *** experimental results show that DCBFT has a more robust dynamic and higher consensus ***,After running for some time,the performance of DCBFT shows some improvement.

关键词： IoT Hierarchical consensus Clustering Reputation evaluation model Practical byzantine fault tolerance