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Relationship between objective and subjective refraction measurements in patients with mild keratoconus
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作者 Masoud Khorrami-Nejad Ahmed Kamil Dakhil +3 位作者 Hesam Hashemian Masoud Sadeghi Reza Yousefi Foroozan Narooie-Noori 《International Journal of Ophthalmology(English edition)》 2025年第3期398-403,共6页
AIM:To compare objective dry retinoscopy and subjective refraction measurements in patients with mild keratoconus(KCN)and quantify any differences.METHODS:This cross-sectional study was done on 68 eyes of 68 patients ... AIM:To compare objective dry retinoscopy and subjective refraction measurements in patients with mild keratoconus(KCN)and quantify any differences.METHODS:This cross-sectional study was done on 68 eyes of 68 patients diagnosed with mild KCN.Objective dry retinoscopy using autorefractometer and subjective refraction measurements were performed.Sphere,cylinder,J0,J45,and spherical equivalent values were compared between the two techniques.RESULTS:The mean age of 68 patients with mild KCN was 21.32±5.03y(12–35y).There were 37(54.4%)males.Objective refraction yielded significantly more myopic sphere(-1.44 D vs-0.57 D),higher cylinder magnitude(-2.24 D vs-1.48 D),and more myopic spherical equivalent(-2.56 D vs-1.31 D)compared to subjective refraction(all P<0.05).The mean differences were-0.87 D for sphere,-0.76 D for cylinder,and-1.25 D for spherical equivalent.No significant differences were found for J0 and J45 values,indicating agreement in astigmatism axis(P>0.05).CONCLUSION:In patients with mild KCN,objective dry retinoscopy overestimates the degree of myopia and astigmatism compared to subjective refraction.The irregular cornea in KCN likely impacts objective measurements.Subjective refraction allows compensation for irregularity,providing a more accurate correction.When determining refractive targets,the tendency of objective methods to overcorrect should be considered. 展开更多
关键词 KERATOCONUS objective refraction subjective refraction
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Objective and subjective measures for sleep disorders 被引量:2
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作者 张琳 赵忠新 《Neuroscience Bulletin》 SCIE CAS CSCD 2007年第4期236-240,共5页
Subjective and objective measures of sleep structure or quality could help to characterize the chronic sleep disturbances, with relation to patients' risk factor profiles and co-morbidities. Studies have shown that d... Subjective and objective measures of sleep structure or quality could help to characterize the chronic sleep disturbances, with relation to patients' risk factor profiles and co-morbidities. Studies have shown that discrepancies can occur between subjective data regarding sleep disturbances and the impact of insomnia and objective assays, and surrogate markers of sleep and sleep disturbances. Both objective and subjective measures should be incorporated into clinic studies. It seems likely that sleep quality is represented by a combination of more than one subjective sleep parameter. Objective and subjective assessments of sleep quality may relate to different parameters. Future studies incorporated both subjective and objective measures could help to address the sleep disorders. 展开更多
关键词 objective measures subjective measures sleep disorders
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Perceptual Quality Assessment of Omnidirectional Images:Subjective Experiment and Objective Model Evaluation 被引量:1
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作者 DUAN Huiyu ZHAI Guangtao +3 位作者 MIN Xiongkuo ZHU Yucheng FANG Yi YANG Xiaokang 《ZTE Communications》 2019年第1期38-47,共10页
Virtual reality(VR) environment can provide immersive experience to viewers.Under the VR environment, providing a good quality of experience is extremely important.Therefore, in this paper, we present an image quality... Virtual reality(VR) environment can provide immersive experience to viewers.Under the VR environment, providing a good quality of experience is extremely important.Therefore, in this paper, we present an image quality assessment(IQA) study on omnidirectional images. We first build an omnidirectional IQA(OIQA) database, including 16 source images with their corresponding 320 distorted images. We add four commonly encountered distortions. These distortions are JPEG compression, JPEG2000 compression, Gaussian blur, and Gaussian noise. Then we conduct a subjective quality evaluation study in the VR environment based on the OIQA database. Considering that visual attention is more important in VR environment, head and eye movement data are also tracked and collected during the quality rating experiments. The 16 raw and their corresponding distorted images,subjective quality assessment scores, and the head-orientation data and eye-gaze data together constitute the OIQA database. Based on the OIQA database, we test some state-of-the-art full-reference IQA(FR-IQA) measures on equirectangular format or cubic formatomnidirectional images. The results show that applying FR-IQA metrics on cubic format omnidirectional images could improve their performance. The performance of some FR-IQA metrics combining the saliency weight of three different types are also tested based on our database. Some new phenomena different from traditional IQA are observed. 展开更多
关键词 perceptual quality assessment OMNIDIRECTIONAL IMAGES subjective EXPERIMENT objective model evaluation VISUAL SALIENCY
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Influence of Subjective Knowledge, Objective Knowledge and Health Consciousness on Olive Oil Consumption—A Case Study
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作者 Adriana Gámbaro Ana C. Ellis Víctor Prieto 《Food and Nutrition Sciences》 2013年第4期445-453,共9页
Unlike the case in Mediterranean countries, where olive oil consumption is driven by habit or tradition, in a population where olive oil consumption rates are considerably low, it appears reasonable to suppose that th... Unlike the case in Mediterranean countries, where olive oil consumption is driven by habit or tradition, in a population where olive oil consumption rates are considerably low, it appears reasonable to suppose that the initial decision to buy a fairly expensive product—as is the case with olive oil in the Uruguayan market—may result from an individual’s overall interest in health-related issues and/or their acquaintance with relevant nutritional properties of the particular product—in this case, olive oil. Consumer subjective and objective knowledge, interest in health-related issues, and demographic variables were studied for their potential relationship (explanatory capacity) with olive oil consumption frequency, using a sample of 256 inhabitants of Montevideo (Uruguay). Several of the studied variables were found to relate to olive oil consumption, such as subjective and objective knowledge, age, education level, marital status, and interest in health-related issues. Subjective knowledge was found to have the highest explanatory capacity. An increase in subjective knowledge is therefore expected to lead to an increase in consumption frequency among regular olive oil consumers, while it may also encourage less frequent or non-consumers to purchase olive oil and become acquainted with the product. 展开更多
关键词 OLIVE Oil subjective KNOWLEDGE objective KNOWLEDGE HEALTH CONSCIOUSNESS Decision Trees
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Efficient Spam Filtering System Based on Smart Cooperative Subjective and Objective Methods
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作者 Samir A. Elsagheer Mohamed 《International Journal of Communications, Network and System Sciences》 2013年第2期88-99,共12页
Most of the spam filtering techniques are based on objective methods such as the content filtering and DNS/reverse DNS checks. Recently, some cooperative subjective spam filtering techniques are proposed. Objective me... Most of the spam filtering techniques are based on objective methods such as the content filtering and DNS/reverse DNS checks. Recently, some cooperative subjective spam filtering techniques are proposed. Objective methods suffer from the false positive and false negative classification. Objective methods based on the content filtering are time consuming and resource demanding. They are inaccurate and require continuous update to cope with newly invented spammer’s tricks. On the other side, the existing subjective proposals have some drawbacks like the attacks from malicious users that make them unreliable and the privacy. In this paper, we propose an efficient spam filtering system that is based on a smart cooperative subjective technique for content filtering in addition to the fastest and the most reliable non-content-based objective methods. The system combines several applications. The first is a web-based system that we have developed based on the proposed technique. A server application having extra features suitable for the enterprises and closed work groups is a second part of the system. Another part is a set of standard web services that allow any existing email server or email client to interact with the system. It allows the email servers to query the system for email filtering. They can also allow the users via the mail user agents to participate in the subjective spam filtering problem. 展开更多
关键词 ANTI-SPAM SYSTEM objective SPAM FILTERING Cooperative subjective SPAM FILTERING WEB Application WEB Services
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Subjective V.S Objective Test Item
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作者 陶永艳 《海外英语》 2011年第4X期129-129,共1页
In this article,I will talk about the definition and discrimination of subjective test and objective test.The strong points and weak points are also discussed.Although each has its own disadvantages,subjective test an... In this article,I will talk about the definition and discrimination of subjective test and objective test.The strong points and weak points are also discussed.Although each has its own disadvantages,subjective test and objective test will still play important roles at present or in future.A good classroom test will usually contain both subjective and objective test items. 展开更多
关键词 subjective and objective TEST LANGUAGE
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A Contrastive Study on the C-E Translation of the Verb of Perception zhijian from the Perspective of Subjective Consciousness and Objective Consciousness
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作者 Huidan Lu 《Review of Educational Theory》 2020年第4期19-24,共6页
Verbs of perception include sight,hearing,smell,taste and touch,of which zhijian belongs to sight is very common in literary works,and its semantic meaning also begins to change with the development of time.Based on t... Verbs of perception include sight,hearing,smell,taste and touch,of which zhijian belongs to sight is very common in literary works,and its semantic meaning also begins to change with the development of time.Based on the original text and two translated versions of the Water Margin,this paper makes a comparative analysis of the translation strategies of zhijian on the basis that Chinese emphasizes subjective consciousness and the mixed consciousness of subjectivity and objectivity,while English stresses objective consciousness with a clear boundary between subjectivity and objectivity.According to previous studies,this paper regroups the appearance of zhijian and divides it into two categories,namely zhijian at the beginning of a sentence and at the beginning of a minor sentence.On the basis of the context and the changing function of zhijian,that is,the function of being a verb and being a discourse marker,it can be concluded that as the meaning of a verb,the real action,the meaning of zhijian is expressed by“seeing”,so translators usually adopt literal translation;while as a discourse marker,it is no longer the main component of sentence structure,but to highlight the following information,translators will adopt deletion,conversion and retaining.It can be seen that translators often need to convert Chinese characterized by subjective consciousness into English dominated by objective consciousness,thus conforming to various meaning of zhijian. 展开更多
关键词 subjective consciousness and objective consciousness Verbs of perception zhijian A contrastive study on the C-E translation
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一种基于Subject-Action-Object三元组的知识基因提取方法 被引量:16
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作者 许琦 顾新建 《浙江大学学报(工学版)》 EI CAS CSCD 北大核心 2013年第3期385-399,共15页
以专利引证网络为载体,从知识基因稳定性、遗传性以及变异性等基本特征出发,提出一种基于subject-action-object三元组的知识基因提取方法.应用连接度算法分析专利引证关系,挖掘引证专利和被引专利之间继承和发展的知识流,建立知识进化... 以专利引证网络为载体,从知识基因稳定性、遗传性以及变异性等基本特征出发,提出一种基于subject-action-object三元组的知识基因提取方法.应用连接度算法分析专利引证关系,挖掘引证专利和被引专利之间继承和发展的知识流,建立知识进化轨迹;利用文本语法分析技术,从专利权利要求书中提取subject-action-object三元组;基于语义词库WordNet进行语义加工,计算语义相似度,合并同义的subject-action-object三元组,绘制知识基因图谱.从美国专利数据库中采集了5 073项1975—1999年授权的数据挖掘领域的相关专利,分析了专利的地区分布情况和年度分布情况.从NBER(National Bureau of Economic Research)的专利数据集中查询得到专利引证关系,利用网络分析软件Pajek构建专利引证网络,作为实验数据样本,对所提出的知识基因提取方法进行验证.实验结果表明:所提取的subject-action-object三元组具备了知识基因稳定性、遗传性和变异性等特征,可以作为知识基因的一种表现形式. 展开更多
关键词 知识基因 subject-action-object三元组 专利引证网络 知识进化 语义相似度
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Argument Ambiguities Make Subject Relative Clause More Difficult to Process than Object Relative Clause in Mandarin
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作者 YANG Xie-lan HE Wen-guang 《Journal of Literature and Art Studies》 2020年第2期102-113,共12页
Relative clauses(RCs)processing has been a hot issue in decades.Studies from head-initial languages have found that SRCs were easier to comprehend than ORCs,and many different models were constructed to account for SR... Relative clauses(RCs)processing has been a hot issue in decades.Studies from head-initial languages have found that SRCs were easier to comprehend than ORCs,and many different models were constructed to account for SRCs preference.Chinese are head-final languages and the head noun phrases are behind the internal-clause.Such a great difference in syntactic structure made Chinese to be the optimum material to test the models mentioned above.In the paper,two experiments were carried out using eye-movement tracking methods to explore the difficulty with RCs processing in mandarin,and results showed that:when the two noun phrases were both from animate category,SRCs were more difficult than ORCs,but when the noun phrases in the internal-relative-clause were inanimate and the noun phrases in the matrix were animate,the difficulties with SRCs were greatly reduced.Based on these findings,we hold that the linear syntactic distance between the gap and the filler was not the key reason to the difficulty with SRCs.On the contrary,the ambiguity in argument construction may be the most important. 展开更多
关键词 subjective RELATIVE CLAUSE object RELATIVE CLAUSE ARGUMENT ambiguity MANDARIN
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What is the subject and object of social security?
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作者 WANG Shuo 《International English Education Research》 2018年第3期47-48,共2页
The subject and the object are a pair of concepts within the philosophical category. Dialectical materialism takes practice as the medium, and holds that subject is the existence of an active objective world, and that... The subject and the object are a pair of concepts within the philosophical category. Dialectical materialism takes practice as the medium, and holds that subject is the existence of an active objective world, and that the object is the object of practical activity. Under certain conditions, the subject and object can In terms of social security, the main body of responsibility is the government that allows the transfer of citizens' rights. Thereforethe government is the main body of production and providers of public goods, and the object is the main body's guaranteed rights and obligations. Commonly pointed objects or things generally refer to specific material information in practical operations, abstract information economy, legal norms, and the entire practice process. 展开更多
关键词 social security subject object
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Subject,Object and Target Systems of Rural Human Resource Development
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作者 SHEN Hong1,2,ZHAO Yong-le2,HUANG De-bing1 1.School of Management,Guilin University of Technology,Guilin 541004,China 2.Business School of Hehai University,Nanjing 210098,China 《Asian Agricultural Research》 2012年第3期33-36,共4页
From subject,object and target subsystems,we analyze the rural human resource development system.The subject system includes government,education and training organizations,society,and rural human resource itself.Diff... From subject,object and target subsystems,we analyze the rural human resource development system.The subject system includes government,education and training organizations,society,and rural human resource itself.Different development subject bears different responsibility.Object system includes farmers engaged in farming,farmer workers,rural unemployed people,rural students,rural left-behind people,and other people in rural areas.Different development object has different features.Development target system includes raising quality of rural human resource,keeping reasonable population size,optimizing structure of rural human resource,and improving vitality of rural human resource,etc. 展开更多
关键词 RURAL areas HUMAN RESOURCE development subject OBJ
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Subjectivities of the Scientific Endeavor:Noting the Illusion of Objectivity in the History of Science and Medicine
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作者 Imanni K.Sheppard 《History & Philosophy of Medicine》 2022年第1期4-8,共5页
The history of science and medicine has long been steeped in the notion that they are objective(untainted by the philosophical and ideological ebbs and flows of society)and utilitarian(doing what is best for the great... The history of science and medicine has long been steeped in the notion that they are objective(untainted by the philosophical and ideological ebbs and flows of society)and utilitarian(doing what is best for the greater good).Because of this,scientific and medical epistemologies and praxis are often held to an esteem that is unquestioned,celebrated,and occasionally unchecked.A closer look at the history of science and medicine,however,readily reveal the extent to which the milieu of society has informed scientific and medical endeavors.As such,an understanding of how the subjectivities of scientific and medical endeavors situate within our contemporary disciplines and practices is significant to one’s ability to truly understand said disciplines.Likewise,such an evaluation will provide insight into our role in perpetuating the illusion of objectivity in these fields.With this in mind,this paper provides a philosophical and historical examination of the concept of objectivity(in contrast to subjectivity)in science and medicine. 展开更多
关键词 objectIVITY subjectIVITY history of science history of medicine natural law
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Non-Rigid Object Tracking by Anisotropic Kernel Mean Shift
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作者 齐苏敏 黄贤武 《Transactions of Tianjin University》 EI CAS 2007年第5期370-374,共5页
Mean shift,an iterative procedure that shifts each data point to the average of data points in its neighborhood,has been applied to object tracker.However,the traditional mean shift tracker by isotropic kernel often l... Mean shift,an iterative procedure that shifts each data point to the average of data points in its neighborhood,has been applied to object tracker.However,the traditional mean shift tracker by isotropic kernel often loses the object with the changing object structure in video sequences,especially when the object structure varies fast.This paper proposes a non-rigid object tracker by anisotropic kernel mean shift in which the shape,scale,and orientation of the kernels adapt to the changing object structure.The experimental results show that the new tracker is self-adaptive and approximately twice faster than the traditional tracker,which ensures the robustness and real time of tracking. 展开更多
关键词 object tracking mean shift anisotropic kernel modal matching
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The integration model of objective and subjective data of residential indoor environment quality in Northeast China based on structural equation modeling
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作者 Yu Chen Bin Chen +1 位作者 Jie Deng Siwei Xu 《Building Simulation》 SCIE EI CSCD 2022年第5期741-754,共14页
Currently the indoor environment quality is described or evaluated mainly by the subjective or objective data.However,research increasingly has demonstrated that objective and subjective data both had some weaknesses ... Currently the indoor environment quality is described or evaluated mainly by the subjective or objective data.However,research increasingly has demonstrated that objective and subjective data both had some weaknesses to characterize the indoor environment quality,and they can compensate for each other's relative weaknesses.Hence,this study aims to develop an integration model to allow indoor subjective and objective data to be combined based on the structural equation modeling approach,using the Northeast China residential indoor environmental survey data.The results indicated that the integration model had a good fit for the survey data,and the model validity was confirmed.Moreover,in contrast to the subjective data(R^(2)=0.363)and objective data(R^(2)=0.239),the integrated data(R^(2)=0.553)improved the explanatory power on the satisfaction with the overall indoor environment.Furthermore,this integration model demonstrated that indoor subjective data assigned more weights to the integrated data than the corresponding objective data.The association strength of thermal environment and indoor air quality(0.43 or 0.47)was the strongest among the interactions of thermal,air quality,acoustic,and lighting environments.Consequently,the main contribution of this paper was that it provided a comprehensive model to accomplish the integration of indoor environmental subjective and objective data,promoting the ability to describe and assess the indoor environment quality. 展开更多
关键词 indoor environment quality integration model subjective data objective data structural equation modeling
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基于高空无人机平台的多模态跟踪数据集 被引量:2
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作者 肖云 曹丹 +2 位作者 李成龙 江波 汤进 《中国图象图形学报》 北大核心 2025年第2期361-374,共14页
目的无人机(unmanned aerial vehicle,UAV)因易操纵、灵活等特点,近年来在军事和民用等多个领域得到广泛应用。相对于低空无人机,高空无人机具有更广的视野,更强的隐蔽性,在情报侦察、灾害救援等方面具有更高的应用价值。然而,现有无人... 目的无人机(unmanned aerial vehicle,UAV)因易操纵、灵活等特点,近年来在军事和民用等多个领域得到广泛应用。相对于低空无人机,高空无人机具有更广的视野,更强的隐蔽性,在情报侦察、灾害救援等方面具有更高的应用价值。然而,现有无人机多模态目标跟踪研究主要针对低空无人机,缺乏高空无人机多模态目标跟踪数据集,限制了该领域的研究和发展。方法构建了一个用于评估高空无人机多模态目标跟踪方法的数据集HiAl(high altitude UAV multi-modal tracking dataset),该数据集主要由搭载混合传感器的无人机在500 m高空拍摄的可见光—红外多模态视频构成,两种模态数据经过精确配准和帧级标注,可以较好地评估不同多模态目标跟踪方法在高空无人机平台下的性能表现。结果将主流的12种多模态跟踪方法在所提数据集与非高空无人机场景数据集上的表现进行了比较,方法TBSI(template-bridged search region interaction)在RGBT234数据集(RGBthermal dataset)上PR(precision rate)值达到0.871,而在本文所提数据集上仅0.527,下降了39.5%,其SR(success rate)值由RGBT234数据集上的0.637,下降到本文所提数据集上的0.468,下降了26.5%。方法HMFT(hierarchical multi-modal fusion tracker)在所提数据集上的PR与RGBT234相比下降了23.6%,SR下降了14%。此外,利用HiAl数据集对6个方法进行重新训练实验,所有重训练方法的性能均得到提升。结论本文提出一个基于高空无人机平台的多模态目标跟踪数据集,旨在促进多模态目标跟踪在高空无人机上的应用研究。HiAl数据集的在线发布地址为:https://github.com/mmic-lcl/Datasets-and-benchmark-code/tree/main。 展开更多
关键词 多模态目标跟踪 高空无人机 微小目标 高质量配准 数据集
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基于组合主客观赋权法的茄衣质量评价 被引量:2
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作者 张友杰 薛野 +4 位作者 王以慧 徐继磊 仇京范 时向东 刘鹏飞 《河南农业科学》 北大核心 2025年第5期159-171,共13页
为了构建1个雪茄茄衣质量的综合评价方法,以国内外40份茄衣样品为研究对象,以茄衣外观质量、物理特性、化学成分和感官质量为评价指标,采用组合客观赋权法(CRITIC权重法、变异系数法、标准差法)与主观赋权法(层次分析法)相结合的方法,... 为了构建1个雪茄茄衣质量的综合评价方法,以国内外40份茄衣样品为研究对象,以茄衣外观质量、物理特性、化学成分和感官质量为评价指标,采用组合客观赋权法(CRITIC权重法、变异系数法、标准差法)与主观赋权法(层次分析法)相结合的方法,对雪茄茄衣质量进行评价。结果表明,主观赋权法中,外观质量权重为47.56%,物理特性权重为20.31%,化学成分权重为10.75%,感官质量权重为21.38%。组合客观赋权法与3种单一客观赋权法之间的一致性和相容性较好,且处理过程更为简单。组合主客观赋权法权重较大的指标为平衡含水率(4.89%)、拉力(4.54%),权重较小的指标为钾含量(0.53%)、还原糖/总糖(0.58%)。茄衣样品综合得分中,得分最高的为来自多米尼加的Primero E1(MSumatra)样品(0.79),得分最低的为来自印度尼西亚的HH1/MM1和来自巴西的WRB/CA/PFS-S样品(均为0.67);多米尼加产地茄衣综合得分最高(0.75),中国福建省产地最低(0.70)。 展开更多
关键词 茄衣 质量评价 权重 客观赋权法 主观赋权法
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基于栅格信息量法的区域地面沉降风险评价——以河北省沧州市为例 被引量:1
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作者 刘波 李诗浓 +3 位作者 李伟 王文鹏 鲁程鹏 束龙仓 《吉林大学学报(地球科学版)》 北大核心 2025年第3期919-929,共11页
地面沉降风险诱发因素复杂、空间分布差异较大,为科学开展地面沉降风险评估工作,本研究提出栅格信息量法的地面沉降风险评价方法。首先通过计算各栅格化评价指标与地表形变量之间的信息量值,定量表征两者之间的关联程度;然后构建包含危... 地面沉降风险诱发因素复杂、空间分布差异较大,为科学开展地面沉降风险评估工作,本研究提出栅格信息量法的地面沉降风险评价方法。首先通过计算各栅格化评价指标与地表形变量之间的信息量值,定量表征两者之间的关联程度;然后构建包含危险性、脆弱性和暴露度3个方面共11项指标的评价体系;再采用主客观综合赋权方法确定权重并计算风险值,通过受试者工作特征曲线进行的可靠性检验后进行风险评价;最后将上述方法应用于2022年河北省沧州市地面沉降风险评价。结果表明:相较于脆弱性评价指标,危险性和暴露度评价指标的栅格信息量值偏高。危险性评价指标中,年平均地面沉降速率为高风险指标,当年平均地面沉降速率为-127~-17 mm/a时,信息量值为1.538,对地面沉降风险的危险性最大;暴露度评价指标中,人口密度为高风险指标,当人口密度>5430人/km^(2)时,信息量值为1.923,对地面沉降风险的暴露度最高。沧州市1 km空间分辨率下地面沉降风险等级为高、较高、中、较低、低五个等级的区域面积占比分别为9.90%、24.91%、31.12%、23.05%、11.02%;高风险区主要集中在沧州市主城区、肃宁县、黄骅市等区域,中风险地区主要分布于沧州市西部区域。栅格信息量法对沧州市地面沉降风险评价的可靠性较好,准确度达到0.714。 展开更多
关键词 风险评价 栅格信息量法 地面沉降 主客观组合赋权 河北省沧州市
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自动驾驶中的3D目标检测研究进展
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作者 陈建 苏思教 +1 位作者 黄立勤 赵铁松 《电子学报》 北大核心 2025年第6期2131-2156,共26页
近年来,自动驾驶因其在提升道路安全、提高交通效率等方面展现出巨大的潜力而受到越来越多的关注.在现代自动驾驶系统中,感知系统扮演着至关重要的角色,其目标是准确地估计周围环境的状态,并为预测和规划提供可靠的观测信息.其中,3D目... 近年来,自动驾驶因其在提升道路安全、提高交通效率等方面展现出巨大的潜力而受到越来越多的关注.在现代自动驾驶系统中,感知系统扮演着至关重要的角色,其目标是准确地估计周围环境的状态,并为预测和规划提供可靠的观测信息.其中,3D目标检测作为感知系统的重要组成部分,旨在预测自动驾驶车辆周围物体的位置、大小和类别.本文归纳了近年来自动驾驶领域中3D目标检测的研究进展,从单模态检测和多模态融合检测两个角度出发,介绍了使用不同传感器进行单模态方法和多模态融合方法的优势和不足.此外,本文还对比了各种代表性算法在公共数据集上的性能,总结了当前常用训练策略,并讨论了该领域未来的发展趋势. 展开更多
关键词 自动驾驶 3D目标检测 单模态 多模态融合
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作为出版客体的知识:从普泛概念到学科工具
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作者 李贝贝 《编辑之友》 北大核心 2025年第9期44-50,共7页
人们对出版的认识方式经历了从编印发的动态流程到主体与客体的二元逻辑,后者为从内部深刻认识出版开辟了新视角。主客体认识方式的引入,串联起近年来围绕出版与知识的一系列讨论,发掘出出版学科的热词“知识”作为出版的客体。知识与... 人们对出版的认识方式经历了从编印发的动态流程到主体与客体的二元逻辑,后者为从内部深刻认识出版开辟了新视角。主客体认识方式的引入,串联起近年来围绕出版与知识的一系列讨论,发掘出出版学科的热词“知识”作为出版的客体。知识与经验归纳、理性思考关联,与人和社会互构,不仅是对客观规律的把握,而且受到人类社会的检视,具有强烈的社会属性。出版活动与知识生产双向奔赴,知识遍布出版的各个角落,出版使知识成为知识,出版的公开性和知识的社会性高度契合,催生了学科认知从出版活动向知识生产的转辙。文章从以知识为客体的视角重新认识出版学科,搭建“知识树”模型,在以往用知识逻辑统领出版的研究基础上,尝试让出版收编知识,稳固出版学科内核,打开学科边界,形成与其他学科的联动。 展开更多
关键词 出版 知识 主体-客体 “知识树”
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