检索结果-南通市图书馆

Brain-inspired dual-pathway neural network architecture and its generalization analysis

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第8期67卷 2319-2330页

作者： DONG SongLin TAN ChengLi ZUO ZhenTao HE YuHang GONG YiHong ZHOU tiangang LIU JunMin ZHANG JiangShe College of Artiﬁcial Intelligence Xi’an Jiaotong UniversityXi’an 710049China School of Mathematics and Statistics Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Brain and Cognitive Science Institute of BiophysicsChinese Academy of SciencesBeijing 100101China Institute of Artiﬁcial Intelligence Hefei Comprehensive National Science CenterHefei 230088China University of Chinese Academy of Sciences Beijing 100049China

In this study, we explored the neural mechanism of global topological perception in the human visual system. We showed strong evidence that the retinotectal pathway in the archicortex of the human brain is responsible for global topological perception, and for modulating the local feature processing in the classical ventral visual pathway. Inspired by this recent cognitive discovery,we developed a novel CogNet architecture to emulate the global-local dichotomy of human visual cognitive mechanisms. The thorough experimental results indicate that the proposed CogNet not only significantly improves image classification accuracies but also effectively addresses the texture bias problem observed in baseline CNN models. We have also conducted mathematical analysis for the generalization gap for general neural networks. Our theoretical derivations suggest that the Hurst parameter, a measure of the curvature of the loss landscape, can closely bind the generalization gap. A larger Hurst parameter corresponds to a better generalization ability. We found that our proposed CogNet achieves a lower test error and attains a larger Hurst parameter,strengthening its superiority over the baseline CNN models further.

关键词： global topological perception dual-pathway generalization gap analysis Hurst parameter

Brain-inspired artificial intelligence research: A review

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第8期67卷 2282-2296页

作者： WANG GuoYin BAO HuaNan LIU Qun ZHOU tiangang WU Si HUANG TieJun YU ZhaoFei LU CeWu GONG YiHong ZHANG ZhaoXiang HE Sheng Chongqing Key Laboratory of Computational Intelligence Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Cyberspace Big Data Intelligent Security Chongqing University of Posts and TelecommunicationsChongqing 400065China College of Computer and Information Science Chongqing Normal UniversityChongqing 401331China State Key Laboratory of Brain and Cognitive Science Institute of BiophysicsChinese Academy of SciencesBeijing 100101China School of Psychological and Cognitive Sciences Peking UniversityBeijing 100871China State Key Laboratory of Multimedia Information Processing School of Computer SciencePeking UniversityBeijing 100871China Department of Computer Science School of ElectronicsInformation and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Faculty of Electronic and Information Engineering Xi’an Jiaotong UniversityXi’an 710049China The Center for Research on Intelligent Perception and Computing Institute of AutomationChinese Academy of SciencesBeijing 100190China Institute of Biophysics Chinese Academy of SciencesBeijing 100101China

Artificial intelligence(AI) systems surpass certain human intelligence abilities in a statistical sense as a whole, but are not yet the true realization of these human intelligence abilities and behaviors. There are differences, and even contradictions, between the cognition and behavior of AI systems and humans. With the goal of achieving general AI, this study contains a review of the role of cognitive science in inspiring the development of the three mainstream academic branches of AI based on the three-layer framework proposed by David Marr, and the limitations of the current development of AI are explored and analyzed. The differences and inconsistencies between the cognition mechanisms of the human brain and the computation mechanisms of AI systems are analyzed. They are found to be the cause of the differences and contradictions between the cognition and behavior of AI systems and humans. Additionally, eight important research directions and their scientific issues that need to focus on braininspired AI research are proposed: highly imitated bionic information processing, a large-scale deep learning model that balances structure and function, multi-granularity joint problem solving bidirectionally driven by data and knowledge, AI models that simulate specific brain structures, a collaborative processing mechanism with the physical separation of perceptual processing and interpretive analysis, embodied intelligence that integrates the brain cognitive mechanism and AI computation mechanisms,intelligence simulation from individual intelligence to group intelligence(social intelligence), and AI-assisted brain cognitive intelligence.

关键词： artificial intelligence cognitive science brain science intelligence science large language model

Nuclear phylogenomics of Asteraceae with increased sampling provides new insights into convergent morphological and molecular evolution

在线全文

学校读者我要写书评

暂无评论

Plant Communications 2024年第6期5卷 117-138页

作者： Guojin Zhang Junbo Yang Caifei Zhang Bohan Jiao JoséL.Panero Jie Cai Zhi-Rong Zhang Lian-Ming Gao tiangang Gao Hong Ma College of Life Sciences Hunan Normal UniversityChangshaHunan 410081China Department of Biology the Huck Institute of the Life Sciencesthe Pennsylvania State UniversityState CollegePA 16801USA State Key Laboratory of Plant Diversity and Specialty Crops Institute of BotanyChinese Academy of SciencesBeijing 100093China Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China Wuhan Botanical Garden and Sino-Africa Joint Research Center Chinese Academy of SciencesWuhan 430074China Department of Integrative Biology University of TexasAustinTX 78712USA CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China Lijiang National Forest Biodiversity National Observation and Research Station Kunming Institute of BotanyChinese Academy of SciencesLijiangYunnan 674100China

Convergent morphological evolution is widespread in flowering plants,and understanding this phenomenon relies on well-resolved *** phylogenetic reconstruction using transcriptome datasets has been successful in various angiosperm groups,but it is limited to taxa with available fresh ***,which are one of the two largest angiosperm families and are important for both ecosystems and human livelihood,show multiple examples of convergent *** Asteraceae phylogenies have resolved relationships among most subfamilies and many tribes,but many phylogenetic and evolutionary questions regarding subtribes and genera remain,owing to limited ***,we increased the sampling for Asteraceae phylogenetic reconstruction using transcriptomes and genome-skimming datasets and produced nuclear phylogenetic trees with 706 species representing two-thirds of recognized *** character reconstruction supports multiple convergent evolutionary events in Asteraceae,with gains and losses of bilateral floral symmetry correlated with diversification of some subfamilies and smaller groups,*** of the calyx-related pappus may have been especially important for the success of some subtribes and *** evolutionary analyses support the likely contribution of duplications of MADS-box and TCP floral regulatory genes to innovations in floral morphology,including capitulum inflorescences and bilaterally symmetric flowers,potentially promoting the diversification of *** divergences and reductions in CYC2 gene expression are related to the gain and loss of zygomorphic *** phylogenomic work with greater taxon sampling through inclusion of genome-skimming datasets reveals the feasibility of expanded evolutionary analyses using DNA samples for understanding convergent evolution.

关键词： sunflower family floral symmetry florets capitulescence molecular clock ancestral character pappus subtribe MADS-box TCP CYC2 gene family gene expression

Argatroban promotes recovery of spinal cord injury by inhibiting the PAR1.JAK2/STAT3 signaling pathway

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第2期19卷 434-439页

作者： Chenxi Zhao tiangang Zhou Ming Li Jie Liu Xiaoqing Zhao Yilin Pang Xinjie Liu Jiawei Zhang Lei Ma Wenxiang Li Xue Yao Shiqing Feng Department of Orthopedics Tianjin Medical University General HospitalTianjinChina International Science and Technology Cooperation Base of Spinal Cord Injury Tianjin Key Laboratory of Spine and Spinal Cord InjuryDepartment of OrthopedicsTianjin Medical University General HospitalTianjinChina Orthopedic Research Center of Shandong University Cheeloo College of MedicineDepartment of OrthopedicsQilu Hospital of Shandong UniversityJinanShandong ProvinceChina

Argatroban is a synthetic thrombin inhibitor approved by *** and Drug Administration for the treatment of ***,whether it plays a role in the repair of spinal cord injury is *** this study,we established a rat model of T1. moderate spinal cord injury using an NYU Impactor ModerⅢand performed intraperitoneal injection of argatroban for 3 consecutive *** results showed that argatroban effectively promoted neurological function recovery after spinal cord injury and decreased thrombin expression and activity in the local injured spinal *** sequencing transcriptomic analysis revealed that the differentially expressed genes in the argatroban-treated group were enriched in the JAK2/STAT3 pathway,which is involved in astrogliosis and glial scar *** blotting and immunofluorescence results showed that argatroban downregulated the expression of the thrombin receptor PAR1.in the injured spinal cord and the JAK2/STAT3 signal *** also inhibited the activation and proliferation of astrocytes and reduced glial scar formation in the spinal *** together,these findings suggest that argatroban may inhibit astrogliosis by inhibiting the thrombin-mediated PAR1.JAK2/STAT3 signal pathway,thereby promoting the recovery of neurological function after spinal cord injury.

关键词： argatroban astrogliosis JAK/STAT signaling pathway protease-activated receptor-1 spinal cord injury thrombin vimentin

东汉雅音地域特色的创新音变考察——以支、脂部相通为例

在线全文

学校读者我要写书评

暂无评论

中国语文 2024年第5期 520-528,638页

作者：边田钢浙江大学汉语史研究中心/汉语言研究所杭州

方音特色的本质是方言音系间的结构性差异,是方言创新音变的结果。支、脂部相通现象在东汉河洛、齐鲁雅音中均有呈现,但河洛雅音仅限于四等韵,齐鲁雅音则包括三、四等韵。相同音类关系在不同音系中所呈现出的语音条件差异,不仅是方音特... 详细信息

方音特色的本质是方言音系间的结构性差异,是方言创新音变的结果。支、脂部相通现象在东汉河洛、齐鲁雅音中均有呈现,但河洛雅音仅限于四等韵,齐鲁雅音则包括三、四等韵。相同音类关系在不同音系中所呈现出的语音条件差异,不仅是方音特色的重要内容,还是揭示方言创新音变的切入点。两地雅音都有的支、脂部四等韵相通,是继承自早期共同语的共同创新,音变机制为支_(齐)^(*)ee>ii元音高化,与脂_(齐)^(*)ii合流。支、脂部三等韵相通,则是齐鲁雅音的独立创新,音变机制为支_(支)^(*)e>i元音高化,与脂_(脂)^(*)i合流。河洛雅音支支、脂脂、之_(之)三分格局为中古《切韵》音系所继承。齐鲁雅音支_(支)、脂_(脂)合流格局可能是中古北方“以紫为姊”音系格局的源头。

关键词：东汉河洛雅音齐鲁雅音地域特色创新音变《切韵》音系

论东汉发生了拉链式“元音大转移”——立足于河洛地区的音类、音值证据

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

浙江大学学报（人文社会科学版） 2024年第6期54卷 120-136页

作者：边田钢卢鹭浙江大学汉语史研究中心浙江杭州310058

关于汉语史上首次“元音大转移”,一般认为是发生在西晋以后到北朝初期的“推链”音变。然而,根据东汉河洛地区音类、音值两方面的证据,即音注、韵段所呈现的音类重组关系和可靠译经音译词对应的原语言音值,可以证明该链移发生于东汉,... 详细信息

关于汉语史上首次“元音大转移”,一般认为是发生在西晋以后到北朝初期的“推链”音变。然而,根据东汉河洛地区音类、音值两方面的证据,即音注、韵段所呈现的音类重组关系和可靠译经音译词对应的原语言音值,可以证明该链移发生于东汉,且是“拉链”音变。“元音大转移”深刻调整了上古韵部的结构和数量,与声母系统的调整一道推动上古音系转变为全新的中古音系格局。古音质变发生于东汉,形成了上、中古音系的分水岭,这与词汇、语法学界的分期认识殊途同归。

关键词：上古音元音大转移音系重组语音史分期

在线全文

学校读者我要写书评

暂无评论

智能生成式设计的人机互补策略研究

家具与室内装饰 2024年第4期31卷 24-28,I0005页

作者：张天钢宋协伟中国国家博物馆北京100006 中央美术学院设计学院北京100105

在分析智能生成式设计的人机分工和协作的基础上,本文通过研究智能生成式设计过程中人类设计者和智能系统各自的优势和劣势,探讨如何发挥两者的优势、补足对方的劣势,以及如何发挥两者的协作优势,总结出了智能生成式设计的人机互补策略... 详细信息

在分析智能生成式设计的人机分工和协作的基础上,本文通过研究智能生成式设计过程中人类设计者和智能系统各自的优势和劣势,探讨如何发挥两者的优势、补足对方的劣势,以及如何发挥两者的协作优势,总结出了智能生成式设计的人机互补策略。结论:智能生成式设计的人机互补策略是发挥人类的优势,补足智能系统的劣势;发挥智能系统的优势,补足人类的劣势;同时发挥设计者和智能系统的协作优势。此互补策略有助于充分发挥人机协同效应、充分利用人机综合优势、提高设计过程的整体效能,实现更高效、更智能、更具创新性的智能生成式设计。

关键词：智能生成式设计人机互补策略人机协同

采用双向流固耦合的胀圈密封功率损失预测模型

在线全文

学校读者我要写书评

暂无评论

西安交通大学学报 2024年第3期58卷 69-81页

作者：冯伟胡帅宫武旗邹天刚桂鹏西安交通大学能源与动力工程学院西安710049 中国北方车辆研究所车辆传动重点实验室北京100072

针对现存胀圈密封功率损失模型不能准测预测出实际运行时密封环的功率损失的问题,提出了新的胀圈密封功率损失预测模型。基于ANSYS Workbench平台建立了包括转轴、配油套及胀圈密封环在内的双向流固耦合数值计算模型,设计并搭建了胀圈... 详细信息

针对现存胀圈密封功率损失模型不能准测预测出实际运行时密封环的功率损失的问题,提出了新的胀圈密封功率损失预测模型。基于ANSYS Workbench平台建立了包括转轴、配油套及胀圈密封环在内的双向流固耦合数值计算模型,设计并搭建了胀圈密封性能试验系统,验证了数值模拟的准确性。通过多元线性回归方法构建了包含油液动力黏度、密封压差、转轴转速以及胀圈密封结构主要尺寸参数的功率损失预测模型,比现存模型包含更多影响因素。分析结果表明:模型预测值与试验值的相对误差在9%以内,满足工业应用要求;功率损失对各影响因素的敏感度由强到弱依次为:密封压差、温度、转速,且密封压差对胀圈密封功率损失影响高度显著。

关键词：胀圈密封功率损失线性回归正交试验数值计算

在线全文

学校读者我要写书评

暂无评论

终归是无处安身——读《河山传》

小说评论 2024年第2期 21-26页

作者：谢有顺刘天罡中山大学

一《河山传》首先吸引我的是它的语言,它的写法。这部有点编年体意味的长篇小说,以时间为经,以人事为纬,如孟繁华所说,它在写法上类似古代中国的史书,如《春秋》《左传》《资治通鉴》等,是一部亦古亦今的现代小说,承袭了世情小说。

关键词：世情小说现代小说《资治通鉴》《左传》孟繁华编年体《春秋》承袭