期刊文献+
共找到3,697篇文章
< 1 2 185 >
每页显示 20 50 100
基于Deep SORT的多无人机跟踪优化算法
1
作者 王尔申 顾佳怡 +4 位作者 徐嵩 于腾丽 李凡 曲萍萍 雷虹 《电光与控制》 北大核心 2026年第4期1-6,共6页
针对单视角识别多无人机容易出现丢失目标和识别错误等问题,提出了一种改进的基于多视角的多无人机跟踪算法YOLOv11-DCAbD,在检测模块部分改进了YOLOv11算法,将C3k2模块与DCNv4结合,实现无人机快速检测;在跟踪模块部分采用改进的Deep S... 针对单视角识别多无人机容易出现丢失目标和识别错误等问题,提出了一种改进的基于多视角的多无人机跟踪算法YOLOv11-DCAbD,在检测模块部分改进了YOLOv11算法,将C3k2模块与DCNv4结合,实现无人机快速检测;在跟踪模块部分采用改进的Deep SORT算法,将Re-ID模块改进为ABD-Net模块,并在数据关联部分采用DBSCAN算法,用于多无人机在多视角下的身份匹配。由于代表性开源无人机数据集缺乏,在自建数据集基础上对算法进行实验验证与对比分析,结果表明,所提算法的跟踪准确率(MOTA)达到88.02%、身份F1得分(IDF1)达到93.87%,能够对多无人机准确检测与稳定跟踪;并通过开源数据集验证了算法的泛化性能,研究结果对多摄像头多无人机跟踪具有较好的借鉴价值。 展开更多
关键词 多无人机 多视角跟踪 DCNv4 ABD-Net DBSCAN
在线阅读 下载PDF
基于五观辨治体系从“郁”探讨肿瘤相关性失眠诊疗策略
2
作者 王紫霖 葛媛莎 李杰 《中医杂志》 北大核心 2026年第3期252-257,共6页
基于五观辨治理论,提出“郁”是贯穿肿瘤相关性失眠(CRI)全程的核心病机,以时空观、核心观、症状观、精准观、未病观构建CRI动态辨治体系。时空观把握肿瘤病程、发病部位与失眠的关联特征;核心观确立“疗前期情志内郁,治疗期药毒致郁,... 基于五观辨治理论,提出“郁”是贯穿肿瘤相关性失眠(CRI)全程的核心病机,以时空观、核心观、症状观、精准观、未病观构建CRI动态辨治体系。时空观把握肿瘤病程、发病部位与失眠的关联特征;核心观确立“疗前期情志内郁,治疗期药毒致郁,癌晚期肾亏毒郁”的病机演变规律,施以疏肝解郁定魂、健脾益肺安魄、补肾化毒安神之法;症状观针对不同失眠症状群指导药物配伍;精准观靶向调控神经-内分泌-免疫网络及体质状态;未病观建立三级预防。突破传统单一症状管理模式,实现从病机根源到症状表现的整体治理,形成“识郁机,缓郁症,防郁态”的全程管理策略,为完善CRI诊疗提供中医思路。 展开更多
关键词 肿瘤相关性失眠 郁证 五观辨治
原文传递
GUIDE FOR AUTHORS
3
《Green Energy & Environment》 2026年第2期I0002-I0005,共4页
Introduction Types of paper Contributions falling into the following categories will be considered for publication:Reviews article(>10000 words),Short review(~5000 words),Feature article(>8000 words),Research pa... Introduction Types of paper Contributions falling into the following categories will be considered for publication:Reviews article(>10000 words),Short review(~5000 words),Feature article(>8000 words),Research paper,Short communication(~3000 words),Commentary(~1000 words),and Viewpiont(~3000 words).Please ensure that you select the appropriate article type from the list of options when making your submission.Authors contributing to special issues should ensure that they select the special issue article type from this list. 展开更多
关键词 special issue article VIEWPOINT REVIEWS feature article short review short communication research paper ARTICLE
在线阅读 下载PDF
GUIDE FOR AUTHORS
4
《Green Energy & Environment》 2026年第1期I0002-I0005,共4页
Introduction Types of paper Contributions falling into the following categories will be considered for publication:Reviews article(>10000 words),Short review(~5000 words),Feature article(>8000 words),Research pa... Introduction Types of paper Contributions falling into the following categories will be considered for publication:Reviews article(>10000 words),Short review(~5000 words),Feature article(>8000 words),Research paper,Short communication(~3000 words),Commentary(~1000 words),and Viewpiont(~3000 words).Please ensure that you select the appropriate article type from the list of options when making your submission.Authors contributing to special issues should ensure that they select the special issue article type from this list. 展开更多
关键词 special issue article VIEWPOINT REVIEWS feature article short review short communication research paper ARTICLE
在线阅读 下载PDF
建构主义下Alternative viewpoints教学观
5
作者 陈赵云 董海燕 《科技信息》 2010年第8期I0178-I0178,共1页
本文阐述了Alternative viewpoints的定义,从心理学和阐释学角度分别探讨了多元观点存在产生的根源,同时强调多元观点对知识建构的意义/价值,并提出实现备选择的观点、备选择的方案的多元方针策略,呼吁使用多元的教学观。
关键词 Ahemative viewpoints 教学观 知识建构 多元
在线阅读 下载PDF
基于扩散模型与高斯泼溅的单视图3D光场内容生成
6
作者 郝东利 于迅博 +4 位作者 高鑫 李宁驰 宋昭祖 颜玢玢 桑新柱 《光学学报(网络版)》 2026年第2期38-48,共11页
为解决3D光场内容的获取成本高、效率低的问题,提出一种基于扩散模型与高斯泼溅的单视图3D光场内容生成方法。该方法通过输入单幅图像,基于扩散模型补充侧面视图,在此基础上,引入基于随机视图监督策略与局部点云自适应补全机制的3D高斯... 为解决3D光场内容的获取成本高、效率低的问题,提出一种基于扩散模型与高斯泼溅的单视图3D光场内容生成方法。该方法通过输入单幅图像,基于扩散模型补充侧面视图,在此基础上,引入基于随机视图监督策略与局部点云自适应补全机制的3D高斯泼溅(3DGS)重建方法,以提升重建质量。对重建后的场景通过离轴渲染生成密集视点图像,并对密集视点图像进行光场编码,实现从单视图到3D光场内容的生成。实验结果表明,改进后的3DGS在峰值信噪比(PSNR)、结构相似性(SSIM)与学习感知图像相似度(LPIPS)上均优于传统3DGS算法。 展开更多
关键词 3D光场内容 扩散模型 高斯泼溅 单视图 密集视点
在线阅读 下载PDF
视点不均匀下不规范运动姿态图像目标点定位
7
作者 周红燕 崔昌水 《计算机仿真》 2026年第1期446-450,共5页
视点不均匀会导致同一目标在不同图像中呈现不同的几何形态和尺度变化,而不规范的运动姿态会引发人体的非刚性形变,在二者的共同作用下图像序列的空间一致性容易被破坏,导致图像序列配准与人体目标特征点捕捉困难。因此,开展视点不均匀... 视点不均匀会导致同一目标在不同图像中呈现不同的几何形态和尺度变化,而不规范的运动姿态会引发人体的非刚性形变,在二者的共同作用下图像序列的空间一致性容易被破坏,导致图像序列配准与人体目标特征点捕捉困难。因此,开展视点不均匀下不规范运动姿态图像目标点定位方法研究。通过改进高斯滤波、Canny算子及利用投影矩阵和加权平均融合法,实现了视点不均匀图像序列的精准配准,有效解决了视点不均匀导致的图像序列配准难题。根据配准结果,采用ViTPose模型,结合多头自注意力机制和人体结构损失,通过模拟遮挡情况提升模型性能,实现了不规范运动姿态图像中目标点的精确定位。ViTPose模型可以捕捉全局信息、模拟遮挡情况增强模型泛化能力,并结合人体结构损失优化预测,有效解决了不规范图像中的目标点定位问题。测试结果表明,在视点不均匀图像配准中,所提方法的SSIM结果保持在0.9以上,且在目标点定位任务中,能准确跟踪并定位被遮挡的目标点。 展开更多
关键词 视点不均匀 不规范运动姿态 目标点定位
在线阅读 下载PDF
Opportunities and Challenges for Chinese Enterprises ──Viewpoints from Foreign Counterparts at Chinese Enterprises' Summit Meeting 2000
8
作者 柏东海 《Electricity》 2001年第1期7-9,共3页
This paper is summarized from the speeches given by foreign entrepreneurs at Chinese Enterprises’ Summit Meeting 2000. In the paper, the entrepreneurs set forth the opportunities for Chinese enterprises and the exist... This paper is summarized from the speeches given by foreign entrepreneurs at Chinese Enterprises’ Summit Meeting 2000. In the paper, the entrepreneurs set forth the opportunities for Chinese enterprises and the existing problems from several aspects as globalization of China, influence of WTO, as well as financial reform and capital market opening, etc. 展开更多
关键词 Entrepreneurs enterprise summit meeting viewpoint summarize
在线阅读 下载PDF
一种基于风机叶尖坐标的多向视点巡检方法
9
作者 潘志毅 焦嵩鸣 +1 位作者 戴杰 王乾铭 《电力科学与工程》 2026年第2期40-47,共8页
针对风电机组自主巡检中多向视点规划因依赖面片模型而难以应用的问题,利用叶尖坐标设计了一种多向视点巡检方法。首先,结合无人机俯仰角约束,计算面向不同叶尖坐标组合的巡检航点。然后,为保障图像质量,通过设置叶片插值点实现各航点... 针对风电机组自主巡检中多向视点规划因依赖面片模型而难以应用的问题,利用叶尖坐标设计了一种多向视点巡检方法。首先,结合无人机俯仰角约束,计算面向不同叶尖坐标组合的巡检航点。然后,为保障图像质量,通过设置叶片插值点实现各航点的视点方向与焦距规划,进而实现叶片在图像中的占比可调。为避免无人机与机组发生碰撞,在机组运行区域外设置了过渡航点,构建出安全的全局巡检路径。在Gazebo仿真环境中对单台风电机组进行对比实验。结果表明,相较于沿叶片定焦巡检方法,用所提方法的航点数量可减少86.11%;在风轮的不同姿态下,巡检时间和路径长度可分别缩短了至少31.7%与14.69%。实验证明,用该方法可以高效实现风机自主巡检。 展开更多
关键词 风电机组巡检 视点规划 无人机 风机叶片 自主巡检
在线阅读 下载PDF
基于NSGA-Ⅱ-IFD算法的大空间多视点三维BIM重建方法
10
作者 李程亮 张永铭 胡雪萍 《自动化应用》 2026年第2期37-41,共5页
为满足复杂建筑场景的三维建筑信息模型(BIM)重建需求,去除三维BIM重建不可行方案的干扰,提出基于NSGA-Ⅱ-IFD算法的大空间多视点三维BIM重建方法。构建多视点优化三维BIM重建模型,以最佳视点感知和最优渲染度量为优化目标,构建多视点三... 为满足复杂建筑场景的三维建筑信息模型(BIM)重建需求,去除三维BIM重建不可行方案的干扰,提出基于NSGA-Ⅱ-IFD算法的大空间多视点三维BIM重建方法。构建多视点优化三维BIM重建模型,以最佳视点感知和最优渲染度量为优化目标,构建多视点三维BIM重建目标函数。通过不可行度(IFD)选择操作,剔除大空间多视点三维BIM重建过程中的不可行方案,依据非劣分类遗传算法,采用非支配排序方式对大空间多视点三维BIM重建方案进行排序,确定最优适应度,求解三维BIM重建优化模型,实现最优的大空间多视点三维BIM重建。实验结果表明,该方法生成的三维BIM重建模型图与实际建筑高度相似,渲染质量优良,具有良好的逼真效果,渲染逼真度高达98.5%以上,纹理质量均高于98%,数据完整性均高于99%,重建误差控制在1%以内。该方法可实现精准可靠的三维BIM重建,有效助力智能施工管理的推进。 展开更多
关键词 NSGA-Ⅱ-IFD算法 多视点 三维BIM重建 视点感知 渲染度量
在线阅读 下载PDF
A Critical Review of Viewpoints on the Time of the Origin of Hongqu(Red Yeast Rice) 被引量:3
11
作者 LIN Feng 《Chinese Annals of History of Science and Technology》 2022年第1期40-54,共15页
Through a summary of the results of past research on the time of the origin of hongqu(红曲,red yeast rice),a critical review is made of multiple pieces of published evidence supporting the various viewpoints that hong... Through a summary of the results of past research on the time of the origin of hongqu(红曲,red yeast rice),a critical review is made of multiple pieces of published evidence supporting the various viewpoints that hongqu originated from the Han,Wei,Jin,Tang,or Song dynasties.Based on a newly discovered textual comment by Kong Guangtao孔广陶(1832–1890)that rectified the mistake of mis-quoting“red wheat powder in Guazhou”(Guazhou hongzhi瓜州红)as“red yeast rice in Guazhou”(Guazhou hongqu瓜州红麯)in Entry into Learning(Chuxue ji初学记),a conclusion can be drawn that the evidence for a Han dynasty origin that has dominated for nearly forty years is not well-grounded,and proposes that Chinese hongqu originated in the Tang dynasty(618–907). 展开更多
关键词 hongqu time of origin viewpoints critical review
在线阅读 下载PDF
Discussion on the TCM Treatment of Hypertension from Pathogenetic Viewpoints of Modern Medicine 被引量:1
12
作者 戴国华 张彤 林慧娟 《Chinese Journal of Integrated Traditional and Western Medicine》 2004年第4期304-307,共4页
The ideal hypotensive agent should possess three essentials, i.e. to depress the blood pressure surely and steadily, and to block the renin-angio-tensin system (RAS)(1). Currently, Western medical treatment could depr... The ideal hypotensive agent should possess three essentials, i.e. to depress the blood pressure surely and steadily, and to block the renin-angio-tensin system (RAS)(1). Currently, Western medical treatment could depress the blood pressure rapidly and surely through reducing blood volume and dilating blood vessels, while traditional Chinese medicine (TCM) shows its superiorities in al- 展开更多
关键词 TCM Discussion on the TCM Treatment of Hypertension from Pathogenetic viewpoints of Modern Medicine
暂未订购
Viewpoints
13
作者 张意 《中学生英语(高中版)》 2008年第35期32-32,共1页
职业没有高低贵贱之分,关键是这个职业是否出了高贵的人。——作家刘震云如此看待职业在这个世界上我不说我是第一,但是,我也绝对不会承认我是第二。
关键词 黑人奴隶 In viewpoints 刘震云 李小龙 座右铭 功夫之王
在线阅读 下载PDF
New Refinement Relations of Z Specifications for Multiple Viewpoints Oriented Requirements Method
14
作者 He Yan xiang, Song Qiang, Huang Qian School of Computer, State Key Laboratory of Software Engineering Wuhan University, Wuhan 430072, China 《Wuhan University Journal of Natural Sciences》 CAS 2001年第Z1期304-312,共9页
In this paper we develop several new refinement relations of Z for multiple viewpoints oriented requirements method (MVORM). The original motivation is that we found the standard Z refinement relation is not adequate ... In this paper we develop several new refinement relations of Z for multiple viewpoints oriented requirements method (MVORM). The original motivation is that we found the standard Z refinement relation is not adequate or correct when considering specifications that have temporal relationships of operations. The concept of temporal state variables is introduced into Z. Then new implementation relations are defined and new refinement relations are deduced, mainly for temporal state variables to process temporal relationships of operations. We use state transition systems to abstract the temporal state transitions. A simple example is used to show the procedures of MVORM. Finally some directions of further work are forwarded. 展开更多
关键词 temporal state variable formal description language state transition system implementation relation refinement relation multiple viewpoints oriented requirements method
在线阅读 下载PDF
Two Generic Frameworks of Multiple Viewpoints Oriented Requirements Method and Their Comparison
15
作者 Song Qiang, He Yan xiang, Huang Qian School of Computer Science, State Key Laboratory of Software Engineering, Wuhan University, Wuhan 430072, China 《Wuhan University Journal of Natural Sciences》 CAS 2001年第Z1期313-319,共7页
Traditional requirements method has some problems when it is used for large distributed systems. Multiple viewpoints oriented requirements method (MVORM) is a new method for resolving these problems. This paper develo... Traditional requirements method has some problems when it is used for large distributed systems. Multiple viewpoints oriented requirements method (MVORM) is a new method for resolving these problems. This paper develops two generic formal frameworks of MVORM, framework based on refinement relation (FBRR) and framework based on implementation relation (FBIR). They are generic, because no assumptions are made about the development process or the formal description languages to be used. Three kinds of specification relations and three kinds of specification transformations are discussed over FBIR and FBRR. This paper also compares the equivalence between FBIR and FBRR. We point out that an equivalent FBIR can be found for any FBRR, but reverse transformation is not always possible. We think FBIR is better than FBRR on most cases. 展开更多
关键词 multiple viewpoints oriented requirements method framework based on refinement relation framework based on implementation relation refinement relation implementation relation
在线阅读 下载PDF
Viewpoints
16
作者 马雪梅 《中学生英语(高中版)》 2008年第26期34-,共1页
1.Believe in yourself,and you will know how to live.
关键词 比尔·盖茨 viewpoints
在线阅读 下载PDF
Comparative Study on Differences of America-China Eco-Literature Viewpoints From the Perspective of Academic Compatibility
17
作者 WANG Xiao-ling 《Journal of Literature and Art Studies》 2012年第8期769-778,共10页
Facing the broad "eco-literature" subjects, this paper, first of all, taking eco-literature viewpoint and the theoretical connotation of eco-criticism viewpoint itself as the starting point, conducts a contrast stud... Facing the broad "eco-literature" subjects, this paper, first of all, taking eco-literature viewpoint and the theoretical connotation of eco-criticism viewpoint itself as the starting point, conducts a contrast study from the cultural origin-tracing on the American eco-literature viewpoint under the Western Bible vision and the Chinese natural eco-literature viewpoint of"Oneness of Men and Nature" through the parallel comparison method; then from the visual angle of influential research is to further explore the academic compatibility in academic research: namely, the Western ecological literature consciousness begins to appear under the premise of the Western ecological civilization being destroyed, while the China's natural eco-literature of"Oneness of Man and Nature" is based on a kind of unconscious affinity between people and nature in primitive age. Here it is necessary for us to point out that they cannot be mentioned in the same breath, because the modern ecological criticism is not the reduction of an ancient ecological thought, and also will lead to the academic non-compatibility in academic research. So only by correcting the people's misunderstanding in cognition, can we reach the unity of the natural ecological viewpoint and man civilized viewpoint so as to keep the harmony between human beings and nature. 展开更多
关键词 eco-literature viewpoints dualism opposite thinking mode "Oneness of Men and Nature" non-compatibility HARMONY
在线阅读 下载PDF
Viewpoints
18
作者 方小丽 《中学生英语(高中版)》 2008年第32期35-35,共1页
1.①此刻打盹,你将做梦;而此刻学习,你将圆梦。②我荒废的今日,正是已逝之人祈求的明日。③觉得为时已晚的时候,恰恰是最早的时候。④勿将今日之事拖到明日。⑤学习时的痛苦是暂时的。
关键词 viewpoints
在线阅读 下载PDF
Two Chinese Translators’ Different Viewpoints on Shijing Translationunder the Theory of Translator’s Subjectivity
19
作者 王朝阳 《大观周刊》 2012年第42期20-21,共2页
在线阅读 下载PDF
基于耦合网络的舆情观点演化机制分析 被引量:3
20
作者 刘继 郭一凡 《情报杂志》 北大核心 2025年第2期136-143,182,共9页
[研究目的]在互联网时代,舆情观点演化并非局限于单一网络环境,而是在多个网络环境交织互动中协同演进。分析舆情观点在耦合网络中的演化机制,对提升舆情治理能力具有重要意义。[研究方法]根据社交网络结构特点设计了线上网络为BA无标... [研究目的]在互联网时代,舆情观点演化并非局限于单一网络环境,而是在多个网络环境交织互动中协同演进。分析舆情观点在耦合网络中的演化机制,对提升舆情治理能力具有重要意义。[研究方法]根据社交网络结构特点设计了线上网络为BA无标度网络,线下网络为WS小世界网络的线上线下耦合网络架构。结合影响力与Deffuant模型构建线上观点演化模型,结合影响力和沉默螺旋理论构建线下观点演化模型,基于用户倾向程度构建层间观点演化模型。[研究结果/结论]通过模型参数配置并进行仿真实验,对不同参数配置下的观点演化进行分析。研究结果表明,所构建的观点演化模型能更好地反映线上线下耦合网络中舆情观点演化的复杂特性,为网络舆情演化分析提供有力支持。 展开更多
关键词 耦合网络 网络舆情 舆情观点 舆情监控 演化机制 Deffuant模型
在线阅读 下载PDF
上一页 1 2 185 下一页 到第
使用帮助 返回顶部