Ultimately Bounded Output Feedback Control for Networked Nonlinear Systems With Unreliable Communication Channel: A Buffer-Aided Strategy

This paper concerns ultimately bounded output-feedback control problems for networked systems with unknown nonlinear dynamics. Sensor-to-observer signal transmission is facilitated over networks that has communication constraints.These transmissions are carried out over an unreliable communication channel. In order to enhance the utilization rate of measurement data, a buffer-aided strategy is novelly employed to store historical measurements when communication networks are inaccessible. Using the neural network technique, a novel observer-based controller is introduced to address effects of signal transmission behaviors and unknown nonlinear dynamics.Through the application of stochastic analysis and Lyapunov stability, a joint framework is constructed for analyzing resultant system performance under the introduced controller. Subsequently, existence conditions for the desired output-feedback controller are delineated. The required parameters for the observerbased controller are then determined by resolving some specific matrix inequalities. Finally, a simulation example is showcased to confirm method efficacy.

Research on Unreliable Narration of Love Writing in “The Bear Came over the Mountain”

Alice Munro,a famous Canadian Canadian short-story writer.She gained the Nobel Prize for Literature in 2013.Munro’s works focus on women and adolescents.She also writes about the illness and love of the elderly.“The Bear Came over the Mountain”is one of them.In this story,Munro adopts unreliable narration to depict love between Grant and Fiona.This paper aims to study the love writing and its unreliable narration in this story.Based on the text of love writing,this paper analyzes the specific strategies of unreliable narration.The author believes that the unreliable narration of the love text in the story can be divided into the unreliable narration of character type and information type.Through analysis of these two types of narration in the story,special meaning of unreliable narration to describe love can be found.Besides,Munro’s description also contains her own insight of love:the course of true love does not always run smooth.

美国实体清单制度对我国实体影响及应对策略--基于中兴、华为、联邦快递案的实证研究

美国基于技术霸权,利用实体清单制度等单边制裁手段对我国经济、科技等领域进行干涉,削弱中国的技术竞争力,触及中国安全。我国出台《不可靠实体清单规定》等法律法规,积极应对美国制裁,维护国家安全。实证研究表明,中国企业在大国博弈下,面临执行实体清单禁令和受到中国反制裁立法体系处罚的两难困境。基于此,我国应在人类命运共同体理念之上,引入严苛的反制裁实体要件体系,并在逻辑上确立反制裁法律制度适用的平衡机制。我国在反制裁法律体系优化中应综合考虑行政救济机制的具体规则、相关法律法规的衔接、工作机制的程序性规范等因素,从而助力中国实体通过相关救济制度走出困境。

爱伦·坡《黑猫》中的不可靠叙述与道德寓意

爱伦·坡是美国著名的诗人、短篇小说家,受到国内外批评界广泛关注。就其短篇小说而言,学界尤其关注他的恐怖短篇小说,聚焦人物的变态心理和行动、故事的离奇怪诞、谋杀的恐怖效果,分析叙事中的残暴恐怖事件给读者带来的惊悚和震愕,但对其小说蕴含的道德寓意关注不多。通过细读短篇小说《黑猫》,可以发现坡塑造了一位为逃脱法律责任而隐瞒杀妻真相的不可靠叙述者。本文运用不可靠叙述理论,分析叙述者在“三大轴”上的不可靠叙述,特别是叙述者的拉近型不可靠叙述所具有的迷惑性和欺骗性,揭示作为叙述者的人物“我”的性格的暴戾乖张、伪善自私,以及作品蕴含的道德寓意,从而激发读者对人性善恶的思考。

士大夫的异域妙想记--论张德彝《航海述奇》中的不可靠叙述

作为近代第一批由清政府派遣赴西方游历、接触西方文化的士大夫代表,张德彝在《航海述奇》中对西方的文化礼制、政治制度、工业技术等进行了全面的记述,这使得同治初年对遥远国度不甚了了的中国人大开眼界。然而,受到思想认知、知识体系、社会历史情境等因素的影响,作为“隐含作者”的张德彝在事实/事件轴、知识/感知轴及不定式视角三个层面出现了错误或不充分的报道、判断与解读,从而构成了不可靠叙述。结合不可靠叙述理论考察张德彝的《航海述奇》,可以在一定程度上展现以张德彝为代表的晚清士大夫群体在中西文化交流过程中的矛盾、冲突与反思。

Cybersecurity Landscape on Remote State Estimation:A Comprehensive Review

Cyber-physical systems(CPSs)have emerged as an essential area of research in the last decade,providing a new paradigm for the integration of computational and physical units in modern control systems.Remote state estimation(RSE)is an indispensable functional module of CPSs.Recently,it has been demonstrated that malicious agents can manipulate data packets transmitted through unreliable channels of RSE,leading to severe estimation performance degradation.This paper aims to present an overview of recent advances in cyber-attacks and defensive countermeasures,with a specific focus on integrity attacks against RSE.Firstly,two representative frameworks for the synthesis of optimal deception attacks with various performance metrics and stealthiness constraints are discussed,which provide a deeper insight into the vulnerabilities of RSE.Secondly,a detailed review of typical attack detection and resilient estimation algorithms is included,illustrating the latest defensive measures safeguarding RSE from adversaries.Thirdly,some prevalent attacks impairing the confidentiality and data availability of RSE are examined from both attackers'and defenders'perspectives.Finally,several challenges and open problems are presented to inspire further exploration and future research in this field.

语文教材中的不可靠叙述:类型、阅读策略及价值

随着不可靠叙述研究的广泛铺展,使用不可靠叙述的经典作品也越来越多地被选入到中小学语文教科书中.面对传统的可靠叙述,读者直接解码叙述者话语来领会作者意图,而不可靠叙述文本阅读需要读者在解读叙述者话语的基础上进一步超越叙述者话语的映射,推断作者寓于作品中的反讽.唯有穿过叙述者的话语迷雾与作者达成共谋,读者才能在获得独特美好阅读体验的同时提升个体的思维能力.

叙事学视域下石黑一雄小说《克拉拉与太阳》研究

《克拉拉与太阳》是日裔英籍小说家石黑一雄获2018年诺贝尔文学奖后推出的一部以人工智能为题材的长篇小说。这部作品模糊了人类与非人类的严格界限,将机器人与人类共置于一个技术高度发达的后人类时代,作品采用“非人类”叙事,以克拉拉这一独特的机器人AF视角观察后人类时代高度发达的科技给人类带来的挑战与问题。该文旨在运用叙事学理论分析《克拉拉与太阳》中的叙事艺术,石黑一雄通过独特的叙述视角、叙述声音、不可靠叙述、陌生化叙事、概念隐喻等手法,探讨爱与人心、自私与欺骗、阶级、人类命运等文学中的永恒主题,警醒人类思考科技进步带来的人际疏离、伦理道德、社会不平等等问题。

SYSTEM AGGREGATION METHOD FOR FAILURE PRONE PRODUCTION LINES WITH UNRELIABLE LIMITED BUFFERS

Different from traditional aggregation method, the unreliable buffers are originally considered and a more general aggregation method is offered, in which not only the unreliable buffers are considered, but also the probabilities of system states are obtained by a discrete model rather than the continuous flow model of unreliable manufacturing systems. The solution technique is offered to get the system sate probabilities. The method advances the traditional system aggregation techniques. Numerical results specify the extended aggregation method and also show that the unreliable limited buffers have a strong impact on the efficiency of the production lines.

Probabilistic Analysis on Connectivity for Sensor Grids with Unreliable Nodes

This paper mainly investigates the connectivity of the unreliable sensor grid network. We consider an unreliable sensor grid network with mn nodes placed in a certain planar area A, and we assume that each node has independent failure probability p and has the same transmission range R. This paper presents a new method for calculating the connectivity probability of the network, which uses thorough mathematical methods to derive the relationship among the network connectivity probability, the probability that a node is ＂failed＂ （not active）, the numbers of node, and the node＇s transmission range in unreliable sensor networks. Our approach is more useful and efficient for given problem and conditions. Such as the numerical calculating results indicate that, for a 100×100 size sensot network, if node failure probability is bounded 0.5%, even if the transmission range is small （such as R = 10）, we can still maintain very high connectivity probability （reach 95.8%）. On the other hand, the simulation results show that building high connectivity probability is entirely possible on unreliable sensor grid networks.

On One Model of Multichannel Queuing System with Unreliable Repairable Servers and Input Memory

The work deals with the development of analytical model of multichannel technical queuing system with unreliable servers and input memory where server failure flows and incoming request flows comply with Poissonian laws, while the flows of failed facilities repairs and flows of incoming requests comply with exponential laws of probability distribution. Random process of system change-over is a Markovian process with continuous time and discrete states. Relations binding basic parameters and output characteristics of the system indicated are obtained as probabilities of system staying in the given moment in one of the possible states. The proposed model is the most generalized compared to some models known in literature which could be considered as special cases of the considered model.

A Rhetorical Analysis of Unreliable Narration in The Loudest Voice

Based on rhetorical research methods of the unreliability,the paper intends to explore the unreliable narrative strategies of the narrator in Grace Paley's The Loudest Voice from the perspectives of the Wayne Booth's criterion of the distance between the narrator and the implied author and James Phelan's extension of unreliability on the basis of classical rhetorical narratology,point⁃ing out that the unreliability serves as the narrative trap which is set up to reveal the inner theme of the work:"The loudest voice"-what the protagonist thought she certainly possessed was only her illusion instead of the truth,and Eastern European Jewish com⁃munity was de facto marginalized by the mainstream culture at that time.

An Analysis of the Unreliable Narrator in The Tell-Tale Heart

The Tell-Tale Heart is a short story by Edgar Allan Poe. The story is first-person narrative of a narrator who murdered an old man with a clouded eye. This paper aims at identifying the speaker"I"as an unreliable narrator through analyzing the motivation, process and confession of the crime. It is found out that the narrator symbolizes man of evil, while, the old man's vulture eye symbolizes virtue. It's a story about the conflict between evil and virtue.

Translations of Unreliable Narrative in Hongloumeng:A Comparative Study on A Dream of Red Mansions and The Story of the Stone

As an encyclopedic novel and the summit of Chinese classical literary creation,Hongloumeng has not received due critical attention to its unusual narrative style,let alone abundant unreliable narrative.From unreliable narration of narrator and character,this research probes into effective translation strategies to achieve a balance between source text and target text,in light of a comparative analysis of typical illustrations taken from A Dream of Red Mansions and The Story of the Stone.

考虑列车随机延误的铁路网络客流均衡分配方法

铁路客流均衡分配是旅客出行选择的集中体现,对旅客列车开行方案和列车运行图等的评价和优化十分重要。实际运营中列车的随机延误会导致铁路旅客的出行时间发生变化,影响旅客的出行,尤其是换乘选择。考虑旅客在路径选择决策过程中的出行时间可靠性和不可靠性2个方面因素,提出一种考虑列车随机延误的铁路网络客流均衡分配方法。首先,构建旅客换乘网络,基于提出的期望−超额出行成本(METC)概念,考虑换乘过程中列车的延误概率,计算旅客的换乘成功概率和换乘周期选择;然后,进一步计算旅客出行路径的期望−超额成本,基于用户均衡条件,构建考虑列车随机延误的期望−超额客流均衡分配模型;最后,考虑到期望−超额出行成本的不可加性,结合相继平均法和k-最短路算法设计基于路径的客流分配算法,并对均衡模型进行求解。通过对一个简单算例和广珠铁路实例进行分析,结果表明:同时考虑出行时间的可靠性和不可靠性时,旅客的出行路径选择和换乘选择与仅考虑出行时间可靠性有较大差异,基于期望−超额的铁路网络客流分配模型可以更加准确地描述考虑列车随机延误的旅客的出行选择行为,证实了均衡分配方法的有效性。因此提出的客流分配方法可以为铁路网络旅客列车开行方案等的制定和优化提供理论依据。

叙事学视域下《拉克伦特堡》的政治隐喻

爱尔兰作家玛丽亚·埃奇沃思虽一再强调她无心于政治,但学术界对其小说《拉克伦特堡》中的政治内涵却极为关注。埃奇沃思在该小说中采取的第一人称不可靠叙事和方言叙事冲突下的类文本叙事策略在表达作者政治隐喻方面发挥了不言而喻的作用。事实上,这两种文本叙事策略分别代表着不同的话语实践体系,从不同侧面隐喻19世纪初期爱尔兰与英国之间复杂的政治关系,折射出英国殖民者与爱尔兰被殖民者之间既相互排斥又心怀恐惧的社会现实和心理状态,体现出埃奇沃思对爱尔兰社会变革的政治态度与变革后为社会发展担忧的矛盾心理。

不可靠叙事与文学作品解读

现代小说叙事明显有别于传统小说叙事,其中最为显著的是现代小说中大量存在不可靠叙事。在现代小说中,作者不仅成功隐退,而且也隐藏了自己的观点,这给读者带来很大的挑战与困难。理解现代小说,要解析其不可靠叙事的原因与目的,这样才能拨云见日,且在叙事性的诗歌里,分析叙事是否可靠也对理解作品有着巨大的认识价值。

一种朴素贝叶斯学习辅助的接触图路由算法

接触图路由(CGR)是星际网络路由协议中的一个重要组成部分,星际网络中节点易受电磁干扰或自身资源不足影响而失效,高度依赖先验知识的接触图路由在节点意外失效时通信性能会急剧恶化。针对上述问题,提出了在接触图路由中引入朴素贝叶斯学习模型来预测节点可靠性的方法。首先根据接触图路由的特点建立节点快照;然后基于节点快照进行朴素贝叶斯建模,预测节点间的不可靠性概率;最后在路由决策时考虑不可靠性概率,选择不可靠性小的节点转发数据。实验结果表明,引入朴素贝叶斯学习可以有效提高接触图路由在恶劣的太空环境中应对节点意外失效的能力,实现对数据的高效传输。

不可靠叙述视角的叙事判断——论《直到我找到你》中父母形象的认知轨迹

《直到我找到你》是美国当代作家约翰·欧文从第三人称有限视角进行叙述的一部自传性长篇小说。欧文运用不可靠叙述视角,独具匠心地塑造了父亲与母亲两个复杂多变的主要人物形象。在儿童叙述视角、成人叙述视角、图像叙述视角等不同叙述视角中,父母形象呈现出不同的性格特征和精神面貌,经历了从“慈母恶父”的建构、解构与重构的认知轨迹,对人的认知能力和判断能力进行诊断,探索并试图对人类走出痛苦困境开出一剂良方。

叙事策略视域下《海》中的不可靠叙述探究

班维尔在其小说《海》中运用不可靠叙述这一强有力的叙事策略探讨了死亡、记忆、创伤、表达及自我这些深刻的主题。首先明确了小说主角兼叙述者莫顿的不可靠叙述者的身份,分析其叙述在“事实/事件”、“价值/判断”及“知识/感知”三个维度上的偏离;接着通过分析小说中三个明显的不可靠叙述的叙事特征,即第一人称叙事、创伤叙事和写画来具体探讨小说的不可靠叙述的呈现;最后指出班维尔通过不可靠叙述这一叙事策略,质疑了记忆的客观性、语言表达的可靠性和自我身份的确定性,并通过不断的质疑和解疑最终完成了主角自我身份的建构。此外,通过不可靠叙述,作者还邀请读者积极地参与到文本互动当中,增强了小说的文学张力并鼓励他们思考自己的主观性如何影响自己对世界的理解。