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基于检测框下边沿的单目视觉车辆测距研究
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作者 刘宏利 王雨林 +1 位作者 邵磊 李季 《计算机科学》 CSCD 北大核心 2024年第S01期415-420,共6页
对车辆测距是当今驾驶领域的热门研究方向。针对传统测距方法测距精度受到车型大小影响的问题以及前车存在的X轴偏移问题,提出了基于检测框下边沿中心点的车辆测距模型。该模型通过使用单目视觉摄像头及车辆检测算法获取前方车辆的位置... 对车辆测距是当今驾驶领域的热门研究方向。针对传统测距方法测距精度受到车型大小影响的问题以及前车存在的X轴偏移问题,提出了基于检测框下边沿中心点的车辆测距模型。该模型通过使用单目视觉摄像头及车辆检测算法获取前方车辆的位置信息,并通过车辆检测框得出的下边沿中心点坐标,以及相机安装的俯仰角信息综合建立了车辆测距模型,解决了车型大小带来的误差问题;通过构建三角函数模型,解决了前车相对于实验车辆存在的X轴分量问题,并优化改进了前车安全距离的判定方式;设定车尾矩形框中心点横坐标与车辆外接矩形框宽度的比值λ,根据λ取值分情况讨论,使该模型更符合场景应用需要。并提出了基于测距关键点的逆透视变换模型,减小了测距误差。实验表明,改进后测距模型的测距精度不受车型大小的影响且能考虑到前车位置的X轴分量问题,改进后的测距模型相对于传统测距模型,测距误差降低了约1.5%,且测距精度明显提高。 展开更多
关键词 单目视觉 测距 逆透视变换 检测框下边沿中心点 目标检测
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Progression of Femmephobia in the LGBTQ+ Community
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作者 James Stair 《Journalism and Mass Communication》 2017年第8期465-471,共7页
All around, men are raised not to be a "sissy", "gay", or a "faggot". Gay men are, then sculpted by a masculinity framework that, from their early years, will not fully accept them. In an attempt to be accepted,... All around, men are raised not to be a "sissy", "gay", or a "faggot". Gay men are, then sculpted by a masculinity framework that, from their early years, will not fully accept them. In an attempt to be accepted, gay men often try to make up for their homosexuality through the performance of masculinity centered on suppression of the feminine. Femmephobia, in this context, is the suppression or rejection of feminine features. In the LGBTQ+ community, femmephobia is driven by the media and masculinity factors that are manifested in standards of attractiveness, but can also be broken down by media outlets that combat these ideas. Media has shaped gay men's perception of body image, standards of beauty, and have led to the progression of femmephobia within the community as a mode of restoring their masculinity that would not accept them. The introduction of alternative ideas of masculinity and gender perception are necessary for creating an inclusive form of masculinity that would promote a greater acceptance of all, and reduce femmephobia in society. Challenges against this masculinity are at work through various routes especially through the media. These venues are creating spaces where male femininity can be further explored and redefined. 展开更多
关键词 femmephobia FEMINISM LGBTQ+ MASCULINITY media MEN MSM
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TransJ: An Abstract Independent-Framework for Weaving Crosscutting Concern into Distributed Transactions
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作者 Anas M. R. AlSobeh Stephen W. Clyde 《Computer Technology and Application》 2016年第4期173-195,共23页
Implementing crosscutting concerns for transactions is difficult, even using aspect-oriented programming languages such as AspectJ. Many of these challenges arise because the context of a transaction-related crosscutt... Implementing crosscutting concerns for transactions is difficult, even using aspect-oriented programming languages such as AspectJ. Many of these challenges arise because the context of a transaction-related crosscutting concern consists of loosely-coupled abstractions like dynamically-generated identifiers, timestamps, and tentative value sets of distributed resources. Current aspect-oriented programming languages do not provide joinpoints and pointcuts for weaving advice into high-level abstractions or contexts, like transaction contexts. To address these problems, we propose an extension to AspectJ framework, called TransJ, that allows developers to define pointcuts in terms of transaction abstractions and that automatically keeps track of context information for transactions. This paper describes TransJ as an abstract independent framework for weaving crosscutting concerns into high-level runtime abstractions, with which developers can implement transaction-related crosscutting concerns in modular, cohesive and loosely coupled transaction-aware aspects. Finally, this paper presents eight different ways in which TransJ can improve the reuse with preserving the performance of applications requiring transactions. Informally, these hypotheses are that TransJ yields (1) better encapsulation and separation of concern; (2) looser coupling and less scattering; (3) higher cohesion and less tangling; (4) reduces complexity; (5) improves obliviousness; (6) preserves efficiency; (7) improves extensibility; and (8) hastens the productivity. A brief discussion of experiment to test the hypotheses is provided, but the details of the experiment are left for another paper. 展开更多
关键词 AOP ASPECTJ TRANSACTION joinpoint model context crosscutting concern encapsulation high-level abstractions MODULARITY reuse.
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A Pragmatic Analysis of Discourse Connectives in the Framework of Relevance Theory
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作者 ZHOU Da-jun REN Miao-miao MING Rui-long 《Sino-US English Teaching》 2018年第1期28-31,共4页
Discourse connectives can be dealt with in relevance-theoretic terms, as indicators of types of relevance. These connectives can be used to constrain the interpretation of an utterance. They are analyzed in a broad cl... Discourse connectives can be dealt with in relevance-theoretic terms, as indicators of types of relevance. These connectives can be used to constrain the interpretation of an utterance. They are analyzed in a broad classification outlined in discourse connectives which introduce contextual implications, which are concerned with strengthening and which introduce denials. A relevance based approach to discourse is a more adequate framework than a coherence based one for the analysis of discourse connectives. 展开更多
关键词 PRAGMATICS discourse connective relevance theory
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Framed-Quadtree Path Planning for an Underwater Vehicle with the Task of Tracking a Moving Target 被引量:1
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作者 高博 徐德民 严卫生 《Journal of Marine Science and Application》 2010年第1期27-33,共7页
An autonomous underwater vehicle (AUV) must use an algorithm to plan its path to distant, mobile offshore objects. Because of the uneven distribution of obstacles in the real world, the efficiency of the algorithm dec... An autonomous underwater vehicle (AUV) must use an algorithm to plan its path to distant, mobile offshore objects. Because of the uneven distribution of obstacles in the real world, the efficiency of the algorithm decreases if the global environment is represented by regular grids with all of them at the highest resolution. The framed quadtree data structure is able to more efficiently represent the environment. When planning the path, the dynamic object is expressed instead as several static objects which are used by the path planner to update the path. By taking account of the characteristics of the framed quadtree, objects can be projected on the frame nodes to increase the precision of the path. Analysis and simulations showed the proposed planner could increase efficiency while improving the ability of the AUV to follow an object. 展开更多
关键词 regular grid framed quadtree data structure algorithm efficiency
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Apocalypse and Body Transgression: On Picasso’s Crucifixion (1930)
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作者 Zarko Paic 《Cultural and Religious Studies》 2018年第4期248-266,共19页
The article deals with the question of the possibility of a new interpretation of Picasso’s picture entitled Crucifixion, which was created in the context of the art paradigm shift in the 1930s when the master focuse... The article deals with the question of the possibility of a new interpretation of Picasso’s picture entitled Crucifixion, which was created in the context of the art paradigm shift in the 1930s when the master focused his attention to the return to painting as a reference framework of myth and religion. But this return was only a turning point towards a modern understanding of the world and art from other sources. It should be noted that the problem of pictorial turn nowadays has a strong impact on the postmodern theology, which encompasses various cultural traditions, and also quite opposite philosophical attitudes. The article shows, thus, the inner relationship and connection between painting art and the search for transgression in the language that was the idea of Bataille. In the first part of this article, author tries to show the consequences of Bataille’s thinking of transgression; the second part has attempted to articulate the problems of interpretation of Picasso’s canvas Crucifixion; and concluding remarks is an attempt to review the emphasis on relationship with pictorial turn and transformations in the notion of contemporary art concerning the body as a sovereign event of the freedom and sacrifice. 展开更多
关键词 APOCALYPSE body transgression PICASSO BATAILLE crucifixion pictorial turn
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凤凰花开的时候
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作者 白瑞 梁瑞 《山西教育(招生考试)》 2019年第5期1-1,共1页
凤凰树五月开花,花五瓣,花大美丽,呈鲜红色带黄晕;花开时满树结花,火红一片,与绿叶相映成趣。凤凰花开之时,高三的你,正在最后冲刺的努力。多少个日日夜夜,课桌上堆成山的习题册,黑板框下的粉笔屑,萦绕在耳边的豪言壮语,再熟悉不过的教... 凤凰树五月开花,花五瓣,花大美丽,呈鲜红色带黄晕;花开时满树结花,火红一片,与绿叶相映成趣。凤凰花开之时,高三的你,正在最后冲刺的努力。多少个日日夜夜,课桌上堆成山的习题册,黑板框下的粉笔屑,萦绕在耳边的豪言壮语,再熟悉不过的教室、食堂、宿舍三点一线或家与学校的两点一线……你说很苦,每天除了刷题还是刷题;你说很累,每天面朝课桌背朝天花板;你说想偷懒,可看到教室墙上的高考倒计时牌便又不敢松懈…… 展开更多
关键词 刷题 教室 凤凰树 课桌 凤凰花开 满树 框下
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Untangling the interactions among the Sustainable Development Goals in China 被引量:7
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作者 Junze Zhang Shuai Wang +2 位作者 Prajal Pradhan Wenwu Zhao Bojie Fu 《Science Bulletin》 SCIE EI CSCD 2022年第9期977-984,M0004,共9页
Understanding the interactions(synergies and trade-offs)among the Sustainable Development Goals(SDGs)is crucial for enhancing policy coherence between different sectors.However,spatial differences in the SDG interacti... Understanding the interactions(synergies and trade-offs)among the Sustainable Development Goals(SDGs)is crucial for enhancing policy coherence between different sectors.However,spatial differences in the SDG interactions and their temporal variations at the sub-national scale are still critical gaps that need to be urgently filled.Here,we assess the spatial and temporal variation of the SDG interactions in China based on the systematic classification framework of SDGs.The framework groups the seventeen SDGs into three categories,namely“Essential Needs”“Objectives”,and“Governance”.Spatially,we found that the SDGs in“Essential Needs”&“Objectives”and“Essential Needs”&“Governance”generally show trade-offs in the eastern provinces of China.Synergies among all three SDG categories are observed in some central and western China provinces,which implies that these regions conform to sustainable development patterns.In addition,temporally,the synergies of the three SDG categories have shown a weakening trend in the last decade,mainly due to the regional differences in the progress of SDG7(Affordable and Clean Energy).Overall,our results identify the necessity for provinces to enhance the synergies between SDG12(Responsible Production and Consumption)and other SDGs to tackle the trade-offs between the“Essential Needs”and“Objectives”.Meanwhile,promoting the progress of SDG7 will also contribute to balanced development across provinces. 展开更多
关键词 Sustainable Development Goals Essential needs GOVERNANCE Objectives INTERACTIONS
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