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Study of mechanical principle of floor heave of roadway driving along next goaf in fully mechanized sub-level caving face 被引量:7
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作者 王卫军 侯朝炯 《Journal of Coal Science & Engineering(China)》 2001年第1期13-17,共5页
Abstract On the basis of analyzing floor strata mechanical circumstance of the roadway, the mechanical model was established. The relative displacement of roadway floor, narrow pillar floor coal mass and floor strata ... Abstract On the basis of analyzing floor strata mechanical circumstance of the roadway, the mechanical model was established. The relative displacement of roadway floor, narrow pillar floor coal mass and floor strata was calculated, the results showed that the high abutment pressure on coal mass beside the roadway was the main reason to lead to relative displacement of floor strata. And the roadway floor heave come mainly from three aspects. Firstly, the roadway floor strata is easily fractured by the stretch stress. Secondly, because the high abutment pressure is greater than the uniaxial compressive strength of floor strata, when the roadway floor strata are fractured, the coal mass floor strata at the same depth will be fractured, and broken rock will fluid into the open roadway. Thirdly, comparing with the coal mass floor, the roadway floor is relative ascending. 展开更多
关键词 floor heave roadway driving along next goaf in coal face with fully mechanized top coal caving mechanical principle
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Characteristics of China's Development in the New Era Explained in Light of Economic Principles
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作者 Yan Kun Zhang Peng 《China Economist》 2018年第3期2-13,共12页
As China entered into a new era of development, the primary contradiction facing Chinese society has also evolved. It is important for both scholars and policymakers to review the characteristics of China's econom... As China entered into a new era of development, the primary contradiction facing Chinese society has also evolved. It is important for both scholars and policymakers to review the characteristics of China's economy in its present stage in accordance with economic principles-principles that reflect every aspect of economic and social life and macroeconomic regulation. In this paper, we attempt to unravel the characteristics of China's new era from three perspectives-historical materialism, dialectic materialism and epistemology, and in light of economic principles at the three levels of resource factors, modes of production and regulation of resource allocation. Based on these perspectives, this paper further identifies the characteristics of China's new era from nine aspects, including globalization, modernization, the primary stage of socialism, new development concepts, supply-side reforms, the guideline of seeking steady progress, the mentality of scope, bottomline mindset and strategic composure. From the three different levels, this paper summarizes and applies economic principles to propose solutions to the problems and challenges facing China in the new era. The findings of the paper are also relevant to implementation of the guidelines CPC Central Committee General Secretary Xi Jinping noted in his report to the 19 th CPC National Congress. 展开更多
关键词 new era characteristics of development in the present stage economic principles report to the 19th CPC National Congress
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An Intercultural Comparison of Politeness Principles and Face
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作者 宋小雪 《科技信息》 2010年第10期I0153-I0153,I0155,共2页
This thesis based on the politeness principle and face theory to reveal the difference between western culture and Chinese culture,including their connotation and concept,to make a good understanding of them and there... This thesis based on the politeness principle and face theory to reveal the difference between western culture and Chinese culture,including their connotation and concept,to make a good understanding of them and therefore,to facilitate a better understanding of western and Chinese culture. 展开更多
关键词 比较关系 中国文化 西方文化 语用学文献
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Analysis on Humor of Situation Comedy My Own Swordsman by Politeness Principles
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作者 吴敏 《海外英语》 2013年第7X期197-199,共3页
Humor,as a linguistic phenomenon,appeals more and more attention from linguist,psychologist,sociologist,and the scholars of other disciplines.This paper,takes the humorous language of My Own Swordsman as research mate... Humor,as a linguistic phenomenon,appeals more and more attention from linguist,psychologist,sociologist,and the scholars of other disciplines.This paper,takes the humorous language of My Own Swordsman as research material,which contain ing the depiction of trivial daily life,the meaning of life.Then,the author analyzed these data and discussed its features of humor from Pragmatic view by Leech and Levinson's politeness principle. 展开更多
关键词 My OWN SWORDSMAN HUMOR POLITENESS principle six ma
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广告景别呈现方式会影响广告态度吗——基于整体优先原则的实证研究 被引量:1
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作者 王娅 李江 +1 位作者 马晨雅 蒋玉石 《南开管理评论》 北大核心 2024年第1期158-167,I0029,I0030,共12页
随着数字经济时代的到来,企业间竞争愈发激烈,广告成为了企业争夺和占有市场的重要手段。如何有效地利用有限的广告位资源,成为了企业不容忽视的关键问题。本研究基于整体优先原则,从信息加工流畅性视角出发,探究了广告景别呈现方式对... 随着数字经济时代的到来,企业间竞争愈发激烈,广告成为了企业争夺和占有市场的重要手段。如何有效地利用有限的广告位资源,成为了企业不容忽视的关键问题。本研究基于整体优先原则,从信息加工流畅性视角出发,探究了广告景别呈现方式对广告态度的影响。研究结果表明,相较于近景系列广告,全景系列广告会使消费者的广告态度更积极,信息加工流畅性在该影响过程中起中介作用。消费者思维模式调节了广告景别呈现方式对信息加工流畅性和广告态度的影响,当消费者处于整体(局部)加工思维模式下,相较于近景(全景)系列广告,全景(近景)系列广告使消费者信息加工更加流畅,广告态度更积极。本研究丰富了视觉线索在营销领域中的应用,研究结论对于企业制定和选择广告策略具有一定的实践意义。 展开更多
关键词 广告态度 广告景别呈现方式 消费者思维模式 信息加工流畅性 整体优先原则
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钨/石墨烯/钨和钨/石墨烷/钨面向等离子体材料的 抗辐照和力学性能: 第一性原理计算
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作者 鄢奇桢 张兆春 +1 位作者 郭海波 王洋 《上海大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第3期512-521,共10页
设计了钨/石墨烯/钨和钨/石墨烷/钨纳米层状复合材料作为热核聚变装置面向等离子体材料,利用第一性原理计算对氦原子填隙和钨空位形成能以及力学性质进行分析.计算结果表明,石墨烯和石墨烷能够捕获钨基金属中的氦填隙原子和钨空位结构缺... 设计了钨/石墨烯/钨和钨/石墨烷/钨纳米层状复合材料作为热核聚变装置面向等离子体材料,利用第一性原理计算对氦原子填隙和钨空位形成能以及力学性质进行分析.计算结果表明,石墨烯和石墨烷能够捕获钨基金属中的氦填隙原子和钨空位结构缺陷,钨/石墨烯或钨/石墨烷界面可以提供钨自间隙原子与钨空位复合位点,两种纳米层状复合材料具有\自修复"性能.基于Fukui函数,可认为上述特性与钨/石墨烯或钨/石墨烷界面钨原子位点反应活性的变化有关.另外,石墨烯可以提高钨基金属的延展性,降低其各向异性. 展开更多
关键词 石墨烯 石墨烷 面向等离子体材料 第一性原理 Fukui函数
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基于空洞单流ViT网络的灵活模态人脸呈现攻击检测方法
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作者 肖立轩 封筠 +1 位作者 高宇豪 贺晶晶 《计算机应用研究》 CSCD 北大核心 2024年第3期916-922,共7页
灵活模态人脸呈现攻击检测突破传统多模态方法对于模型训练与部署的模态一致性限制,可将统一模型按需灵活部署到多样模态的现实场景,但仍存在模型性能有待提升、计算资源需求高的问题。为此,提出一种以视觉Transformer(ViT)结构为基础... 灵活模态人脸呈现攻击检测突破传统多模态方法对于模型训练与部署的模态一致性限制,可将统一模型按需灵活部署到多样模态的现实场景,但仍存在模型性能有待提升、计算资源需求高的问题。为此,提出一种以视觉Transformer(ViT)结构为基础的单流灵活模态人脸呈现攻击检测网络。提出空洞块嵌入模块以减少运算冗余,降低输入向量维度;为区分不同模态特征,设计模态编码标记;采用非补齐策略处理模态缺失问题。在公开多模态数据集上的实验结果表明,该方法在域内和跨域评估中分别获得2.69%和33.81%的最佳平均ACER值,相较于现有的三种方法,具有更优的域内和域外泛化性能,在不同子协议上的性能表现较为均衡,且其模型计算量与参数量均远低于多流方法,更加适合模态缺失场景下的灵活、高效部署。 展开更多
关键词 人脸呈现攻击检测 灵活模态 多模态 视觉Transformer
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汽车底盘系统螺纹联接防松策略探究
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作者 郭志明 封佳伟 +2 位作者 杜阿雷 蔡礼刚 谷天乐 《时代汽车》 2024年第16期147-149,共3页
螺纹联接是汽车底盘系统最广泛的联接方式,螺纹联接技术是确保联底盘联接可靠性的最重要技术之一;紧固联接松动是螺纹联接最常见的失效问题,如何有效解决螺纹防松问题一直是确保汽车底盘联接设计的关键环节;通过对螺纹联接系统原理及敏... 螺纹联接是汽车底盘系统最广泛的联接方式,螺纹联接技术是确保联底盘联接可靠性的最重要技术之一;紧固联接松动是螺纹联接最常见的失效问题,如何有效解决螺纹防松问题一直是确保汽车底盘联接设计的关键环节;通过对螺纹联接系统原理及敏感因素DOE分析,TOP3影响因素为摩擦系数(端面摩擦系数及螺纹摩擦系数)、螺栓伸长量;对TOP3因素的防松策略进行探究,提出汽车底盘系统螺纹联接防松策略,以供行业参考。 展开更多
关键词 螺纹联接系统原理 端面摩擦系数 螺纹摩擦系数 螺栓伸长量
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Pragmatics Study of Politeness and Cultural Difference
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作者 齐岩 《黑龙江生态工程职业学院学报》 2008年第6期127-128,共2页
This paper aims at study the politeness in the pragmatic framework and reviews the main studies of politeness by western and Chinese scholars.Meanwhile,the writer tries to reveal the cultural difference existing in po... This paper aims at study the politeness in the pragmatic framework and reviews the main studies of politeness by western and Chinese scholars.Meanwhile,the writer tries to reveal the cultural difference existing in politeness by comparative study of western and Chinese language. 展开更多
关键词 POLITENESS the FACE theory POLITENESS principle and CULTURAL DIFFERENCE
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浅析在线课程内容与呈现形式的匹配原则
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作者 陈亦炼 《科教导刊》 2024年第10期42-44,共3页
一个好的在线课程,不仅要有好的教学内容,还要与好的呈现形式相匹配,相得益彰,提升学习效果。对在线课程内容与呈现形式的匹配,从技术视角开展的研究成果较多,而本研究则力求运用双边匹配理论,从类型匹配、通道匹配和技术匹配三个层面... 一个好的在线课程,不仅要有好的教学内容,还要与好的呈现形式相匹配,相得益彰,提升学习效果。对在线课程内容与呈现形式的匹配,从技术视角开展的研究成果较多,而本研究则力求运用双边匹配理论,从类型匹配、通道匹配和技术匹配三个层面提出基本设想,对其基本原则进行理论探讨。 展开更多
关键词 在线课程 呈现形式 匹配层面 基本原则
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Continuous-Time Models for Firm Valuation and Their Collateral Effect on Risk-Neutral Probabilities and No-Arbitraging Principle 被引量:3
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作者 Valery V Shemetov 《Management Studies》 2020年第3期191-214,共24页
Extensions of Merton’s model(EMM)considering the firm’s payments and generating new types of firm value distribution are suggested.In the open log-value/time space,these distributions evolve from initially normal to... Extensions of Merton’s model(EMM)considering the firm’s payments and generating new types of firm value distribution are suggested.In the open log-value/time space,these distributions evolve from initially normal to negatively skewed ones,and their means are concave-down functions of time.When payments are set to zero or proportional to the firm value,EMM turns into the Geometric Brownian model(GBM).We show that risk-neutral probabilities(RNPs)and the no-arbitraging principle(NAP)follow from GBM.When firm’s payments are considered,RNPs and NAP hold for the entire market for short times only,but for long-term investments,RNPs and NAP just temporarily hold for individual stocks as far as mean year returns of the firms issuing those stocks remain constant,and fail when the mean year returns decline.The developed method is applied to firm valuation to derive continuous-time equations for the firm present value and project NPV. 展开更多
关键词 firm present value geometric Brownian(Structural)model risk neutral probabilities no-arbitrage pricing principle
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Improving presentation effectiveness
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作者 Eduardo Mayorga 《Annals of Eye Science》 2019年第1期141-145,共5页
Presentations using PowerPoint or similar software are probably the most commonly used format that doctors use for teaching in medical school,during residency,at medical meetings and other continuous medical education... Presentations using PowerPoint or similar software are probably the most commonly used format that doctors use for teaching in medical school,during residency,at medical meetings and other continuous medical education(CME)activities.However,their effectiveness has been questioned by many.This article intends to provide,in a synthetized way,several recommendations that can help make presentation more effective. 展开更多
关键词 presentations adult learning multimedia principles PERFORMANCE
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Analysis of Conversational Implicatures in Early Autumn
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作者 林怡 《海外英语》 2013年第22期227-229,共3页
Early Autumn written by Langston Hughes is a short story about ex-lovers Mary and Bill who come across on Wash ington Square in a dusk of early autumn.The story is composed mainly by short conversation and scenery dep... Early Autumn written by Langston Hughes is a short story about ex-lovers Mary and Bill who come across on Wash ington Square in a dusk of early autumn.The story is composed mainly by short conversation and scenery depiction.This paper investigates the characteristics of Mary and Bill through conversation analysis based on Cooperative Principle and Face Theory. 展开更多
关键词 EARLY AUTUMN CONVERSATIONAL implicatures Cooperati
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A Comparative Study of Face and Politeness in Chinese and Western Cultures
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作者 陈凤芳 《海外英语》 2013年第17期174-175,共2页
This paper makes a comparative study of the Chinese and western attitudes towards"face"and"politeness". When concerning the standards of politeness, western cultures focus more on the creation of i... This paper makes a comparative study of the Chinese and western attitudes towards"face"and"politeness". When concerning the standards of politeness, western cultures focus more on the creation of individual's private space; while Chinese culture, as a typical collectivist culture, shows more stress on harmony and group identity. But some euphemisms and cultural rit uals show the generosity of being polite in both cultures. After this comparative study of face and politeness in two cultures, there will be a better understanding of politeness between Chinese and western communication. 展开更多
关键词 FACE THEORY POLITENESS principle CULTURAL differen
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纹理和深度特征增强的双流人脸呈现攻击检测方法 被引量:2
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作者 孙锐 冯惠东 +2 位作者 孙琦景 单晓全 张旭东 《模式识别与人工智能》 EI CSCD 北大核心 2023年第3期242-251,共10页
人脸呈现攻击是一种利用照片、视频等将人脸通过媒介呈现在摄像头前欺骗人脸识别系统的技术.现有的人脸呈现攻击检测方法大多采用深度特征辅助监督分类,忽略有效的细粒度信息以及深度信息与纹理信息的相互联系.因此,文中提出纹理和深度... 人脸呈现攻击是一种利用照片、视频等将人脸通过媒介呈现在摄像头前欺骗人脸识别系统的技术.现有的人脸呈现攻击检测方法大多采用深度特征辅助监督分类,忽略有效的细粒度信息以及深度信息与纹理信息的相互联系.因此,文中提出纹理和深度特征增强的双流人脸呈现攻击检测方法.一端网络通过中心差分卷积网络提取比原始卷积网络更鲁棒的欺骗人脸纹理模式.另一端网络通过生成对抗网络生成深度图的深度线索,提高对外观变化和图像质量差异的稳定性.在特征增强模块中,设计中心边缘损失,对两类互补特征进行融合和增强.在4个数据集上的实验表明,文中方法在数据集内以及跨数据集的测试中都取得较优性能. 展开更多
关键词 呈现攻击检测 人脸反欺骗 生成对抗网络 特征增强 中心边缘损失
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Politeness Principle ond its Use to Sove Face
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作者 赵静 《大观周刊》 2011年第31期18-18,24,共2页
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Deep Transfers of p-Class Tower Groups
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作者 Daniel C. Mayer 《Journal of Applied Mathematics and Physics》 2018年第1期36-50,共15页
Let p be a prime. For any finite p-group G, the deep transfers T H,G ' : H / H ' → G ' / G " from the maximal subgroups H of index (G:H) = p in G to the derived subgroup G ' are introduced as an ... Let p be a prime. For any finite p-group G, the deep transfers T H,G ' : H / H ' → G ' / G " from the maximal subgroups H of index (G:H) = p in G to the derived subgroup G ' are introduced as an innovative tool for identifying G uniquely by means of the family of kernels ùd(G) =(ker(T H,G ')) (G: H) = p. For all finite 3-groups G of coclass cc(G) = 1, the family ùd(G) is determined explicitly. The results are applied to the Galois groups G =Gal(F3 (∞)/ F) of the Hilbert 3-class towers of all real quadratic fields F = Q(√d) with fundamental discriminants d > 1, 3-class group Cl3(F) □ C3 × C3, and total 3-principalization in each of their four unramified cyclic cubic extensions E/F. A systematic statistical evaluation is given for the complete range 1 d 7, and a few exceptional cases are pointed out for 1 d 8. 展开更多
关键词 Hilbert p-Class Field Towers p-Class GROUPS p-Principalization Quadratic FIELDS Dihedral FIELDS of Degree 2p Finite p-Groups Two-Step Centralizers Polarization principle Descendant Trees p-Group Generation Algorithm p-Multiplicator RANK Relation RANK Generator RANK Deep Transfers Shallow Transfers Partial Order and Monotony principle of Artin Patterns Parametrized Polycyclic pc-presentations Commutator Calculus
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人脸识别技术应用的权益矛盾与法律平衡 被引量:1
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作者 杜欣芸 刘湘琛 《怀化学院学报》 2023年第4期62-68,共7页
人脸识别技术日趋成熟,应用愈加广泛,但也隐藏着很大的隐患和风险,一旦被滥用,将严重侵害公民的个人隐私权、个人信息自决权等人格权益以及相应的财产权益。人脸识别技术的应用能引发公民人脸信息的权益保护与商业利益的直接矛盾;同时,... 人脸识别技术日趋成熟,应用愈加广泛,但也隐藏着很大的隐患和风险,一旦被滥用,将严重侵害公民的个人隐私权、个人信息自决权等人格权益以及相应的财产权益。人脸识别技术的应用能引发公民人脸信息的权益保护与商业利益的直接矛盾;同时,人脸识别技术应用中公民人脸信息权益与政府所代表的公共利益之间也存在矛盾。为回应这些利益矛盾,我国法律对人脸识别技术的规制原则隐含了由强调网络安全秩序的“秩序原则”到以公民权利框架保护个人信息的“强化保护原则”再到加强保护与规范利用相结合的“平衡原则”的演变。随着《中华人民共和国个人信息保护法》的实施,平衡原则进一步具体化和实体法化是有必要的。通过制定专门的人脸识别技术应用法规、推动人工智能人脸识别技术的行业自律、建立人脸识别技术的行政许可和准入制度,平衡原则之下的人脸识别技术应用法律规制可以被进一步完善。 展开更多
关键词 人脸识别技术 人脸识别信息 平衡原则
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基于价值呈现的历史建筑保护真实性思考——上海康定东路85号张爱玲故居修缮设计为例 被引量:3
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作者 付涌 张怡欣 《建筑遗产》 2023年第2期140-149,共10页
历史建筑的“真实性”与其是否能够充分展示该建筑的价值信息密切相关。在保护实践中,既要保护其历史、科学、艺术价值,呈现历史的真实性,同时又需要正视并解决当下现实问题带来的挑战,妥善把握修缮策略,以推动项目成功。康定东路85号... 历史建筑的“真实性”与其是否能够充分展示该建筑的价值信息密切相关。在保护实践中,既要保护其历史、科学、艺术价值,呈现历史的真实性,同时又需要正视并解决当下现实问题带来的挑战,妥善把握修缮策略,以推动项目成功。康定东路85号张爱玲故居是上海市第五批优秀历史建筑,修缮过程中设计团队始终在思考历史建筑的保护价值和保护意义,试图在翔实的历史研究和现状调研基础上,从更好呈现建筑遗产历史真实性价值的角度提出风貌完形的指导思想,并依托审慎的修缮设计策略、最小干预原则的实践把握,以及传统工艺与当代标准的有效互补等手段来完成修缮设计实践,使这座具有特殊意义的历史建筑真实表达它的历史风貌和价值内核。 展开更多
关键词 张爱玲故居 历史建筑保护 真实性 价值呈现 最小干预原则
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权利框架下的面部识别技术:风险与规制的学理分析 被引量:2
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作者 孙康 《中国海洋大学学报(社会科学版)》 2023年第1期81-93,共13页
面部识别技术在为人类社会生活带来一定便利的同时,也隐含着权利风险与殷忧。将该技术引入权利分析框架中可发现,作为特殊的生物识别信息,面部信息承载着人权、人格权及个人信息(权)等三重维度、不同位阶、逐层嵌套的基本权利及具体权利... 面部识别技术在为人类社会生活带来一定便利的同时,也隐含着权利风险与殷忧。将该技术引入权利分析框架中可发现,作为特殊的生物识别信息,面部信息承载着人权、人格权及个人信息(权)等三重维度、不同位阶、逐层嵌套的基本权利及具体权利,需要明确面部信息的权利属性,有效区分该技术带来的不同层次的权利风险,并从国家、社会和个人等不同主体角度对该技术层次各异的需求出发,适度且综合运用比例、诚信和自愿等三大原则,有效规制该技术在个人权利方面带来的安全风险,保障合理应用,并促进良性发展。 展开更多
关键词 面部识别技术 人权 人格权 个人信息(权) 比例原则
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