Results 11 to 20 of about 15,214 (117)

Parametric modeling of 3D fish body(三维鱼体参数化建模)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2022
因水下环境复杂,鱼类三维模型获取非常困难,基于三维鱼类数据驱动的很多自动化研究工作无法开展。为此,提出一种三维鱼体参数化建模方法。首先,用专业建模师构建的标准鱼体模板注册扫描仪采集三维鱼体数据,构建拓扑结构一致的三维鱼体网格数据集;其次,用主成分分析法对数据集中的三维鱼体网格模型进行建模分析,建立鱼体的参数化表示模型;最后,采集草鱼数据进行相关实验。实验结果表明,注册得到的三维鱼体模型与真实扫描鱼体模型顶点之间的平均均方根误差仅为0.691 3 mm,在可接受范围 ...
HUHaitao(胡海涛)   +4 more
doaj   +1 more source

京津冀国家算力枢纽节点赋能全球数字经济标杆城市建设

open access: yes大数据, 2023
随着“东数西算”工程的启动,京津冀作为国家算力枢纽节点,设立张家口数据中心集群,区域算力布局不断优化。北京自2021年开始加快建设全球数字经济标杆城市,致力于形成算力一体化协同发展格局,数据中心密度达到全球领先水平。北京数字经济核心产业具有较强的基础优势,但数据中心作为高能耗产业,仅依靠北京市当地的基础设施建设无法完全满足实时算力需求。因此,从算力资源共享、绿色能耗支撑、产业发展协同等方面探讨了京津冀国家算力枢纽节点对北京市全球数字经济标杆城市建设的促进作用 ...
郭琨, 康雨馨, 卓训方
doaj   +1 more source

“东数西算”成渝枢纽战略分析和示范落地

open access: yes大数据, 2023
数字经济时代,算力已成为衡量国家经济发展程度的重要指标。通过对“东数西算”和“成渝地区双城经济圈建设”两大国家战略进行剖析,并结合“东数西算”成渝枢纽节点建设情况,提出成渝枢纽节点之所以被布局为东部枢纽节点之一,主要得益于算力战略区位优势、数据融通体系保障、算力基础设施夯实、算力应用场景成熟四方面原因。进一步,以西部(重庆)科学城先进数据中心为例,剖析了“东数西算”在成渝地区的示范落地,并提出为更好地发挥成渝枢纽节点的作用,一方面成渝枢纽内天府、重庆数据中心集群可从网络、数据、算力、产业、算法 ...
张自力, 解婷, 李文平
doaj   +1 more source

“东数西算”工程建设的现状、问题与对策

open access: yes大数据, 2023
“东数西算”工程是构建我国国土空间领域内算力资源东西平衡、按需调度的重大战略工程。自我国全面启动“东数西算”工程建设以来,供需端、能源端、技术端、机制端等暴露出诸多问题,迫切需要从理论层面对“东数西算”工程的内在逻辑进行重新分析与定义。从经济形态、技术趋势、科技竞争、成本收益等不同视角分析了“东数西算”的内在逻辑,即算力基础设施化,并提出打造全国算力一张网的新型基础设施,以及从政策布局、网络直连、技术支持、机制创新等方面构建国家算力网的对策建议。
童楠楠, 陈东, 李慧颖, 朱洪林
doaj   +1 more source

算力度量与任务调度:物联网端侧设备策略研究

open access: yesDianxin kexue
随着移动通信、人工智能等技术的发展,智能设备和数据呈现爆炸式增长的态势,物联网(Internet of things,IoT)场景对算力、时延和能耗提出了更高的要求。算力网络通过对计算节点进行互联,基于统一的算力度量标准和任务调度策略,实现算力资源的共享和高效利用,为提升物联网系统的计算性能提供了新思路。但是由于物联网设备种类繁多、网络连接方式各异且对功耗敏感,当前以计算能力为主的算力度量方法无法满足物联网设备协作的需求。此外,目前算力网络的计算任务调度方法普遍依赖中心化的网络路由节点或管理平台 ...
祝淑琼, 徐青青, 李小涛, 陈维
doaj   +1 more source

Comparative species distribution model framework for marine conservation and its application to loggerhead turtles in the Mediterranean

open access: yesConservation Biology, EarlyView.
Abstract Modeling species distributions in dynamic pelagic environments remains challenging, particularly for wide‐ranging and highly mobile species when there is limited guidance on model performance. This limitation constrains the effective use of species distribution models (SDMs) in marine conservation, where robust and transferable predictions are
E. Pasanisi   +32 more
wiley   +1 more source

Genomics‐informed management of ex situ populations

open access: yesConservation Biology, EarlyView.
Abstract The European Association of Zoos and Aquariums (EAZA) manages insurance populations for hundreds of species through its EAZA ex situ programs (EEPs). EEPs help safeguard against extinction in the wild and provide source populations for genetic rescue programs.
Cock van Oosterhout   +8 more
wiley   +1 more source

Transitioning From L1 Medium of Instruction to L2 English Medium Instruction: The Role of Translanguaging in Contributing to EFL Students’ Language Learning Motivation

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Research on English‐Medium‐Instruction (EMI) highlights inadequate support for students transitioning from L1‐medium‐instruction to EMI. To date, little research has focused on how L2 students’ adaptation to an EMI environment influences their L2 learning motivation (LLM).
Kevin W. H. Tai
wiley   +1 more source

Acceptance and Engagement in Artificial Intelligence–Supported Reading Among Primary School Learners of English as a Foreign Language

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Artificial intelligence (AI) is increasingly used to support language learning, yet little is known about how younger learners accept and engage with AI‐assisted reading. This study investigates primary school students’ acceptance of and engagement with an AI‐supported adaptive reading application for English as a Foreign Language (EFL ...
Mi Tang   +5 more
wiley   +1 more source

Accountability in Government Use of AI: Citizen Concerns and Preferences

open access: yesPublic Administration, EarlyView.
ABSTRACT Government adoption of AI opens the “pandora's box” of accountability, a core aspect of public value. Despite the centrality of governmental AI accountability, citizens' concerns and preferences in holding governments accountable for AI usage remain poorly understood.
Naikang Feng, Yanto Chandra
wiley   +1 more source

Home - About - Disclaimer - Privacy