Results 31 to 40 of about 5,129,551 (205)
智能科学与技术学报, 2022 基于少量图像的三维重建被认为是第三代人工智能的经典应用之一。在计算机图形学和计算机视觉领域，基于少量图像的三维重建任务因具有广泛的应用场景和很高的研究价值，长期以来吸引着众多学者的目光。引入深度学习方法后，该领域于近年来得到了长足发展。对此类基于少量图像的三维重建任务进行了全面阐述，并介绍了本研究组在该方面的系列工作，对其中涉及的数据类型进行分析，阐明其适用性和一般处理方法。此外，对常见的数据集进行分析、整理，针对不同重建方法，归纳出其基本框架、思路。最后，展示了一些常见三维重建的代表性实验结果 ...
于航, 付彦伟, 姜柏言, 薛向阳
doaj
Comprehensive Risk Assessment of Hazards in Grain Supply Chain Based on Multi-Dimensional Data(多维数据驱动粮食供应链危害物风险综合评价) [PDF]
Shipin kexue jishu xuebao, 2019 In order to scientifically and reasonably evaluate the comprehensive risks of heavy metals, mycotoxins, pesticide residues and microorganisms in all aspects of the grain supply chain, based on the analysis of sampling data and other multi-dimensional ...
WANG Xiaoyi(王小艺) +5 more
doaj +1 more source
, 2017 随着大数据产业的发展,大数据的跨平台使用和调用愈加频繁。以用户全量为特征的大数据具有高度精准和信息量大的特点,为了确保用户隐私、数据源提供商商业信息安全,我们需要对大数据使用的边界进行明确定义。通过对大数据模型构建和使用目的的分类分析,我们可以定义出大数据使用的边界并通过使用边界构建出安全调用模型。在明确的使用边界和安全调用模型基础上,大数据数据源提供方和调用方可以有效确保信息安全,避免大数据调用中可能存在的各种风险。
张琳, 丁大勇
core +1 more source
, 2019 【目的】研究从科技大数据中提取结构化知识、构建学术知识网络的模型与方法, 支持智能知识服务产品的研发提升精准知识发现能力。【方法】提出科技大数据知识图谱的构建模型和技术架构, 在汇聚和融合科技大数据知识资源的基础上, 以大数据平台分布式存储和高性能计算为支撑环境, 详细设计和实现科研实体知识抽取、实体对齐和关系发现、知识融合与语义丰富化、语义化存储、质量管理等知识图谱构建技术。【结果】构建3亿实体和11亿关系的科技大数据知识图谱, 有效支撑科技大数据知识发现平台和“慧科研&rdquo ...
常志军 +4 more
core +1 more source
Efficient lookup method of OpenFlow table based on predictive caching [PDF]
Jisuanji gongcheng, 2019 There are serious performance bottlenecks of flow table lookups as OpenFlow supports wildcard search.Therefore,a lookup method of OpenFlow table is proposed based on network traffic locality.By caching recent frequent connections in packet traffic and ...
FU Ming,HE Yang,XIONG Bing
doaj +1 more source
Wildlife Letters, EarlyView.Using radiotelemetry, we found that the movement and home range of the endangered Sacalia bealei varied significantly across reproductive classes and seasons, with males exhibiting greater movement than females during wet and mating seasons. The species exhibits strong aquatic dependence, favoring deep pools interspaced among riffle‐pool sequences ...
Wing Sing Chan +3 more
wiley +1 more source
Wildlife Letters, EarlyView.We used spatially explicit capture‐recapture to estimate jaguar densities in a private reserve in the Colombian Llanos and quantified land cover change in and around the reserve from 2014 to 2024. Densities increased 22% since 2014, while disturbed land cover increased by 39%–54% around the reserve depending on buffer distance. Our study indicates that
Valeria Boron +7 more
wiley +1 more source
, 2021 【目的】解决海量篇级文献的存储与在线访问、大规模数据治理和服务性能低的问题,建设科技文献大数据平台。【方法】以分布式技术为基础,分析科技大数据特点及服务导向,结合服务器、网络等硬件资源条件,采用共租部署策略,设计了"5+2"整体架构的科技文献大数据平台。【结果】建成PB级科技文献大数据平台,数据存储量达到200TB,文献实体量达3.2亿条,实体关系量达60亿条,基于MapReduce的元数据处理性能提高3倍,形成了基于微服务的知识服务架构。【局限】该平台未设计完整的流式处理流程 ...
常志军 +7 more
core
Wildlife Letters, EarlyView.The study explores how beavers (Castor spp.) affect endangered freshwater pearl mussels (Margaritifera margaritifera) in European rivers. Beaver dams can harm small, fragmented mussel populations by reducing flow, increasing sediment, and potentially limiting host fish movement, while larger populations may benefit from improved bed stability and ...
Louise Lavictoire +2 more
wiley +1 more source
Wildlife Letters, EarlyView.FoxWatch is a user‐friendly analytical workflow that converts camera‐trap detections into dependable estimates of fox abundance. The user‐friendly Shiny R app standardizes data preparation, employs Simultaneous‐Count Models modeling, and displays uncertainty in clear, comprehensible outputs. By connecting field monitoring with decision‐making, FoxWatch
Duminda S. B. Dissanayake +1 more
wiley +1 more source