A Secure Device Management Scheme with Audio-Based Location Distinction in IoT

Identifying a device and detecting a change in its position is critical for secure devices management in the Internet of Things(IoT).In this paper,a device management system is proposed to track the devices by using audio-based location distinction techniques.In the proposed scheme,traditional cryptographic techniques,such as symmetric encryption algorithm,RSA-based signcryption scheme,and audio-based secure transmission,are utilized to provide authentication,non-repudiation,and confidentiality in the information interaction of the management system.Moreover,an audio-based location distinction method is designed to detect the position change of the devices.Specifically,the audio frequency response(AFR)of several frequency points is utilized as a device signature.The device signature has the features as follows.(1)Hardware Signature:different pairs of speaker and microphone have different signatures;(2)Distance Signature:in the same direction,the signatures are different at different distances;and(3)Direction Signature:at the same distance,the signatures are different in different directions.Based on the features above,amovement detection algorithmfor device identification and location distinction is designed.Moreover,a secure communication protocol is also proposed by using traditional cryptographic techniques to provide integrity,authentication,and non-repudiation in the process of information interaction between devices,Access Points(APs),and Severs.Extensive experiments are conducted to evaluate the performance of the proposed method.The experimental results show that the proposedmethod has a good performance in accuracy and energy consumption.

No-relationship Between Impossibility of Faster-Than-Light Quantum Communication and Distinction of Ensembles with the Same Density Matrix

It has been claimed in the literature that impossibility of faster-than-light quantum communication has an origin of indistinguishability of ensembles with the same density matrix. We show that the two concepts are not related.We argue that even with an ideal single-atom-precision measurement, it is generally impossible to produce two ensembles with exactly the same density matrix; or to produce ensembles with the same density matrix, classical communication is necessary. Hence the impossibility of faster-than-light communication does not imply the indistinguishability of ensembles with the same density matrix.

On The Distinction between Semantics and Pragmatics

The close relationship between semantics and pragmatics has made it difficult to set a clear boundary between them.Dicussion of the relationship can date back to Morris, whose semiotic trichotomy was taken up by Carnap. Leech, Levinson, Bach and Huang also tried to make a distinction between the two, but no consensus has been reached.

Distinctions between the Three Major Native Dialects of English

This paper focuses on essential distinctions between the major native dialects of English which are often divided by linguists into the three general categories of the British Isles dialects,those of North America and those of Australasia.English learners might want to learn a standard accent,because maybe they need it in a play or maybe they want to impress their friends,or maybe they want to fit in better in a certain English speaking environment.The paper hopes to help Chinese English learners firstly isolate the distinctions among different but widely-used and officially-accepted accents and then speak good English by means of eliminating incorrect accent by imitating Standard English pronunciation.

Automatic Identification for Laparoscopic Surgical Procedure for Ligation and Online Distinction of Abnormal Manipulation for Thread Knotting

Laparoscopic surgery is a difficult surgical procedure compared with laparotomy. In particular, considerable skills and care are required for thread knotting in laparoscopic surgery. In this paper, a method for automatic identification of a laparoscopic surgical procedure for ligation and online distinction of an abnormality, defined as any unusual manipulation, in the identified surgical procedure is proposed. Ligation is divided into several individual surgical procedures, and on the basis of the threshold criteria, each surgical procedure is identified. Next, the identified surgical procedure, thread knotting, is classified as either normal or abnormal using a self-organizing map. Finally, to reduce surgical error, an abnormality warning system which warns detection of an unusual manipulation in the surgical procedure to the operator is constructed.

A Research of the Distinctions between English and Chinese Tenses

By observing the grammar systems of Chinese and English,it is found that the uses of tenses between the two languages are very different. It turns out that the Chinese expressions of tenses are more casual and variable,without fixed rules,while for English,more regular. The distinct ways and patterns of expressing tenses between Chinese and English give rise to more frequent errors made by students. Thus,only by a thorough and profound understanding of these distinctions can we find a better way to master the uses of tenses,which requires a reasonable comparison of the tenses between Chinese and English.

习近平文化思想的理论渊源、鲜明特征和核心要义

习近平文化思想内涵丰富,是一个博大精深、系统完备、“体用贯通”的科学理论体系。从总体上深刻把握习近平文化思想的理论渊源、核心要义、鲜明特征等,既是深刻领会习近平文化思想的重要维度,也是持续加强对这一思想学习研究和贯彻落实的迫切需要。从理论渊源看,习近平文化思想是对马克思主义文化理论继承创新、对中华优秀传统文化精华传承发展、对世界一切优秀文明成果借鉴吸收的最新马克思主义文化成果。从特征看,习近平文化思想在人民性、创新性、“明体达用、体用贯通”性等方面的鲜明特性,生动展现了其思想的本质和理论形象。从核心要义看,习近平文化思想主要围绕坚持党的文化领导权、坚定文化自信、建设文化强国、坚持“两个结合”、建设中华民族现代文明等内容,为新时代文化建设提供理论和行动指引。

试论“谐体”与“本体”的界定区分及其重要意义

汉语学界多年前就开始对谐音结构中的“谐体”和“本体”加以界定和区分。尽管前述概念早已用开,但论及何谓谐体何谓本体始终是各说各话。目前流行的代表性观点主要有三种,而无论着眼于谐音生成的起与讫,还是着眼于形式表现的常与变,还是着眼于语义层次的内与外,均无法保证这三种观点无往不利。文章通过同比喻和借代相关概念的比较,亦即通过同喻体和本体、代体和本体的比较,以及基于术语系统对称性和整齐性的考量,提出将对应于手段还是对应于目的作为区分谐体和本体根据的新观点,并对此作了充分验证。科学界定和正确区分谐体和本体,对谐音构成机理的探究、谐音研究的学术交流、谐音译注的理解领会、语文教学的顺利开展及语文词典的规范编纂,都有着重要的学术价值和实践指导意义。

数字化转型差异度对企业绩效的影响研究

基于最优区分理论,构建企业数字化转型差异度对企业绩效影响的研究框架,并探索市场竞争程度、政策不确定性和战略差异度的调节效应。以2007~2021年A股上市公司为样本进行实证检验,研究发现:数字化转型差异度与企业绩效之间呈倒U形关系;市场竞争程度的提升导致倒U形曲线变得更加陡峭,且转折点向左移动;政策不确定性的提升导致倒U形曲线变得更加平缓,且转折点向左移动;战略差异度的提升导致倒U形曲线变得更加平缓,且转折点向右移动。

德行诠释学建构的辨与思——潘德荣教授学术访谈录

潘德荣教授提出的德行诠释学展示了哲学诠释学理论当代发展的多重理论面向。概括起来看,自然与精神、理论与实践、认知与诠释、理解与德行、本体与生命之间的辨与思集中体现了德行诠释学建构过程中的思维理路。

广义Erdös-Straus猜想的互异正整数解的存在性

本文研究当n>k≥2且t≥2时方程k/n=1/x_(1)+1/x_(2)+…+1/x_(t)的互异正整数解,证明若方程有正整数解,则至少有一互异正整数解;当k=5,t=3时,除了n≡1,5041,6301,8821,13861,15121(mod 16380)外方程有一互异正整数解;当n≥3,t=4时,除了n≡1,81901(mod 163800)外方程有一互异正整数解;并进一步指出对于任意的n(>k),当t≥k≥2时,方程至少有一互异正整数解.

一流大学医学院文化建设的探索与思考——以浙江大学医学院的实践为例

文化建设是促进一流大学医学院高质量发展的内在精神动力,也是其传播力和影响力的有力抓手,承担着文脉传承与价值引领的作用。本文结合新时期加强学院文化建设的重要意义,立足一流大学医学院文化建设的不足和迫切需求,剖析梳理浙江大学医学院构建特色文化体系的探索实践和标志成效,为进一步深化一流大学医学院文化内涵建设,强化一流大学医学院文化引领能力提供路径。

突破“双重劣势”:数字企业国际化创新机制研究——基于最优区分视角

数字企业国际化创新面临来源国劣势和新进劣势共同作用所带来的“双重劣势”挑战,为突破“双重劣势”,数字企业必须拟定有效的国际化创新战略,在“差异化”和“合法性”之间取得平衡。本文以TikTok进军美国市场的成功经验为例,运用最优区分理论提炼出了数字企业国际化创新战略演化模型。研究发现:数字企业通过反应式协同平衡数字平台的差异化与合法性进而突破“新进劣势”,借助前瞻式协同平衡数字平台的差异化与合法性进而打破“来源国劣势”,最终占领国际市场。研究结论从最优区分视角为数字企业国际化创新提供了系统的分析框架和管理启示。

考虑消落带岩体劣化影响的典型危岩岸坡稳定性研究

三峡库区周期性水位升降引起的消落带岩体劣化对典型危岩岸坡稳定性具有重大影响。基于野外调研及地勘资料,采用通用离散单元法程序(universal distinct element code,简称UDEC)研究了消落带劣化区形态对近水平层状高陡危岩岸坡的稳定性影响。研究表明:目前三峡库区巫山段的近水平层状危岩岸坡消落带岩体劣化严重,在不同消落带劣化区存在紧密层状、松散碎裂状、溶蚀凹腔状、含挤压碎裂带等典型消落带劣化区形态;含有第1种消落带劣化区形态的危岩岸坡稳定性较好,危岩体位移较小,失稳模式为滑移破坏;含有第2种消落带劣化区形态的危岩岸坡危岩体先向坡内偏移,其后随着消落带岩体支撑强度弱化向坡外倾倒破坏;含有第3种消落带劣化区形态的危岩岸坡危岩体向坡外位移较大,失稳模式为倾倒破坏;含有第4种消落带劣化区形态的危岩岸坡稳定性主要受挤压破碎带的力学性质控制,易产生沿破碎带切割面的旋转滑移破坏;通过对以上4种劣化区形态的危岩岸坡增加防治加固措施,危岩体的变形位移得到了不同程度的有效控制。

基于时空理论的团队最优区分管理框架研究

如何管理团队中的一致性(“同”)和多样性(“异”)是重要的研究问题。最优区分理论提供了一个认识该问题的重要视角,个体既有与特定群体保持相似的“同属”需要,也有表现个人独特一面的“区分”需要。这两种心理需要间有内在张力,能否较好地满足和平衡二者会给个体和团队带来影响。本研究指出,该理论存在一些局限性。研究基于领导和管理的时空理论,结合最优区分和团队管理研究,构建了在团队管理中如何实现和促进最优区分的理论。研究阐述了如何用时空理论理解团队管理,分析了团队中的“同属”和“区分”在空间(维度、层次)和时间(动态)上的表现与特征。研究提出了基于时空理论的团队最优区分管理框架,指出领导者可以在维度、层次上动态地采取不同措施,以实现对看似对立需要的协调统一。研究借助重心隐喻阐述了该理论框架对综合、系统地考虑多要素的强调,建构了最优区分的时空平衡和时空最优解。研究最后讨论了理论贡献、实践意义和未来展望。

区隔与重构:《贵州山民图》中的民族边缘意识

《贵州山民图》是庞薰琹抗战时期所创作的民族主题系列组画。《贵州山民图》以庞薰琹在贵州苗族地区的民族学考察为创作契机,以苗族人民的生活劳作为题材,详细描绘了苗民的衣饰花纹,从而突出了苗族较汉族的“异质性”。但在表现形式上,庞薰琹采用中国传统水墨笔法表现苗族群体,为苗民形象增添了文人意味,使汉、苗两族的艺术风格得以有效结合,反映出民国时期民族边缘的重构过程。因此,《贵州山民图》既强调了汉民族的主体地位,又折射出少数民族的汉化历程,是民国时期整体国族观念下的产物。庞薰琹以绘画的形式将民族研究成果直观化、视觉化,为中国近代民族学发展提供了与艺术相关的新思路,使此时的民族学研究更为全面多样。

权益区分理论下数据法益保护模式

大数据时代各种数据权益保护学说值得进一步反思与检讨。数据权益保护问题在我国既有规则体系内完全能够得到妥善解决。因数据的非排他性与权利的排他效力间的根本冲突,数据权益难以被纳入绝对权或相对权中进行保护,而各类新型数据权利混淆了权利在民法体系中的定位,忽视了体系功能,甚至阻遏数据的共享与流通。从体系逻辑、制度调适成本与数据治理全球发展方向来看,数据权益应当被纳入法益保护模式中。数据法益保护应以事实控制状态为基础,将数据权益直接归属于事实控制人,保护范围以各个主体享有的事实利益范围为限。数据产权分置政策应经法律解释还原为数据法益归属确认的基础前提与数据主体行为规范的设计方向。

“双碳”领域颠覆性技术度量与识别——基于多源数据融合方法

颠覆性技术是促进国民经济发展和提升大国博弈实力的关键因素,培育和发展颠覆性技术意义重大、影响深远。建设美丽中国是时代的责任,实现碳达峰碳中和是大势所趋。从学术论文、专利以及基于Google Trends数据的社会媒体数据出发,构建多源数据融合的颠覆性技术度量方法。以增长率指标、创新性指标和社会影响力指标测度“双碳”领域颠覆性技术,综合考虑技术对科学界、技术界以及社会经济界三方面的影响;在识别过程中,采用改进后的CDTM模型解决多源数据公共主题提取问题;通过客观赋权计算颠覆性指数得分,度量主题的颠覆性。实证分析识别出4项“双碳”领域颠覆性技术,分别是生物炭吸附技术、有机生物炭基肥料制备技术、生物质裂解生物炭技术和生物质热解生物炭技术。4项技术均与国际认可的CCUS技术相关,中国和美国在“双碳”领域研究中占据优势地位。

块裂隧道围岩等效岩体变形参数研究

采用Voronoi离散单元方法建立块裂岩体隧道的随机DEM数值模型,通过大量随机数值计算结果验证采用岩体等效变形参数预测隧道收敛变形的可行性。在规则裂隙岩体等效变形参数计算方法的基础上,针对数值模拟揭示的深埋隧道变形特征提出改进的修正计算公式及相应的特征参数。通过与既有解答以及大量随机数值计算结果的对比和统计分析验证修正解的合理性,修正解较为合理改善既有规则裂隙岩体等效变形参数计算方法在反映随机块裂岩体在隧道卸荷条件下变形估算的较大误差。采用修正计算方法得到的岩体等效变形参数可以很好地预测随机块裂岩体中隧道开挖后收敛变形的数学期望值。提出的修正计算方法对当前深部岩体变形参数研究和隧道洞壁收敛位移的估算具有一定的参考价值。