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基于Borges差分的RMSprop算法及在卷积神经网络参数训练中的应用
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作者 高哲 剪静 《辽宁大学学报(自然科学版)》 CAS 2023年第1期1-9,F0002,共10页
针对RMSprop算法存在梯度消失和局部最优的问题,本文提出了一种基于Borges差分的RMSprop算法并应用到卷积神经网络参数训练方法.根据Borges分形导数的定义,本文给出了Borges差分的定义;将Borges差分与RMSprop算法相结合,提出了基于Borge... 针对RMSprop算法存在梯度消失和局部最优的问题,本文提出了一种基于Borges差分的RMSprop算法并应用到卷积神经网络参数训练方法.根据Borges分形导数的定义,本文给出了Borges差分的定义;将Borges差分与RMSprop算法相结合,提出了基于Borges差分的RMSprop优化算法,提高了图像识别的精度和学习收敛速度;给出了一种基于梯度信息的自适应的调整阶次的方法.本文以Fashion-MNIST数据集为例,分析了阶次对网络参数训练结果的影响,验证了本文提出的算法提高卷积神经网络的识别精度和学习收敛速度的有效性. 展开更多
关键词 卷积神经网络 RMSprop算法 borges差分 分形导数 反向传播
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基于Ferry Borges理论的地震与重卡车作用下桥梁内力的组合问题 被引量:5
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作者 孙得璋 孙柏涛 George C.Lee 《地震工程与工程振动》 CSCD 北大核心 2011年第6期18-23,共6页
目前的AASHTO LRFD桥梁规范主要考虑重力荷载和卡车等活荷载的组合情况,而没有在概率基础上考虑地震等极端荷载的组合问题。包括LRFD在内的很多桥梁抗震规范都是主要考虑地震的作用,甚至设计时不考虑其他荷载的作用,LRFD设计指导手册中... 目前的AASHTO LRFD桥梁规范主要考虑重力荷载和卡车等活荷载的组合情况,而没有在概率基础上考虑地震等极端荷载的组合问题。包括LRFD在内的很多桥梁抗震规范都是主要考虑地震的作用,甚至设计时不考虑其他荷载的作用,LRFD设计指导手册中在考虑地震等极端荷载时,也只是提到在特殊情况和桥梁比较长的情况下再考虑卡车的作用,而且,也比较模糊。文中在考虑地震荷载与卡车荷载时将其视为2种随机过程函数,并分析其各自的荷载特点。结合最近一些年USGS收集的极端荷载数据,文中认为桥梁设计(考虑地震和重卡车设计)时应该综合考虑地震和重卡车的影响,对它们进行荷载组合。接着,文中简单回顾了几种荷载组合方法,对比之后,认为FerryBorges(也称Ferry Borges-Castanheta模型)模型考虑了荷载的持时因素与荷载发生概率,虽然也对荷载做了极大的简化,但很好地解释了随机过程转化成随机变量以及与其他随机变量组合的复杂问题。最后,本文以美国西雅图地区的一桥梁为研究对象进行了算例分析。 展开更多
关键词 LRFD 极端荷载 随机过程 荷载组合 地震与重卡车 FERRY borges 桥梁设计
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A letter from professor Joao Borges Fortes Filho in Brazil
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作者 Porto Alegre RS, Brazil 《国际眼科杂志》 CAS 2007年第2期335-335,共1页
关键词 巴西 Joao borges Fortes Filho教授 视网膜病 IJO 研究进展
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Reading as Transformational Journey From Homer to Borges
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作者 Robin McAllister 《Journal of Literature and Art Studies》 2015年第6期385-393,共9页
The transformational journey archetype begins long before literature in rites of initiation when a child undergoes a journey full of tests and temptations, perilous encounters in an underworld, and visions that transf... The transformational journey archetype begins long before literature in rites of initiation when a child undergoes a journey full of tests and temptations, perilous encounters in an underworld, and visions that transform the child into a member of a tribe. Before this archetype is translated by the written word into literature, the telling of the story is not just the account of something that happened long ago in the past, but an actual reenactment of the events for the audience. The journey archetype appears in the earliest example of literature, Homer's Odyssey, where Homer makes the readers both an observer and participant in the transformation. The journey does not always, as in rites of initiation, involve a child and occur only once in life. Instead, the journey may begin in death and trauma and involve a person who must resume that journey over again as an adult. Such is the fate of Aeneas in Virgil's Aeneid whose transformative journey begins with the burning towers of Troy. In these two early epics the heroes suffer the loss of an older world and must resume their pursuit of new identities in a new world after descending to a land of death or underworld to consult ancestor figures who prepare them for the transition to a new life, identity, and destiny. The reader of these works participates in the journeys the heroes undertake and learns to renew contact with the sources of life and consciousness in myth, magic, and vision. Dante's journey through the Inferno to his vision of God in Paradiso is a culmination of this transformative experience and vision, whose intent is to transform us as well through imaginative and intellectual participation in the journey. In Jorge Luis Borges's parody of Dante in his story, "El Aleph", Borges goes beyond Dante in making the reader, not only a participant in the journey and vision, but a "writer" whom Borges evokes to transform the impossible vision of the Aleph into an illusion of reality. Unlike Dante's positive transformational vision of the universe as a harmonious cosmos embraced within the vision of God as if it were a book uniting its multiple pages in one binding, the vision of the Aleph confronts the protagonist and readers with a universe that is random and chaotic, a vision that is disillusioning rather than transformational. 展开更多
关键词 transformational journey READING rite of initiation HOMER VIRGIL Dante borges
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Reading Borges at Iguazu Falls
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作者 Robin McAllister 《Journal of Literature and Art Studies》 2015年第10期830-834,共5页
An observer at Iguazu Falls tries to make sense of the inexpressible natural wonder through the texts of Jorge Luis Borges's essays and poems. Borges's paradoxes of time, immortality, and eternity give meaning to th... An observer at Iguazu Falls tries to make sense of the inexpressible natural wonder through the texts of Jorge Luis Borges's essays and poems. Borges's paradoxes of time, immortality, and eternity give meaning to the vision, while the natural wonder gives substance to those idealist concepts derived from Berkeley. As a reader of Borges's fictions, I yield up my personal identity to an impersonal dreaming consciousness that resembles Berkeley's mind as a consciousness sustaining the reality I perceive. Borges writes in his poem "Dawning" that "ideas are not like marble, everlasting, but ever-renewing like a forest or a river". The cataracts of Iguazu are both eternal and immortal, eternal in the sense of removing our consciousness of time and confusing past, present, and future in constant repetition, and immortal in the sense of only existing in individual drops of water constantly disappearing and renewing in infinite repetition. The cataracts are perfect emblems of this immortality. The cataracts are time, infinite moments of immortality, moving forward, accelerating, repeating themselves identically, until they achieve a certain eternity, no motion, suspended in time. I am Berkeley's Eternal Spirit, the consciousness evoked by Borges in his essay, "A New Refutation of Time". Distance from the immediate impact of the Falls helps transform fear and horror into sublimity. The closer to the Falls, the more the observer feels fear and anguish at his own insignificance, a fear of annihilation. Aesthetic distance requires an image or word, something that exempts us from immediate contact, and allows us to descend into the whirlpool and come back to the calm surface. The vision evoked in writing and reading fiction is both prior and subsequent to the reading. Our vision of the universe is always inexpressible, a problem of accommodating something overwhelming to the limited schemata we use to grasp existence. 展开更多
关键词 BERKELEY borges Iguazu Falls ETERNITY IMMORTALITY
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Signs of the Concept of Chaos in Kant’s Thinking and Its Relationship with Jorge Luis Borges’Thinking
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作者 Pablo César Martín Meier 《Journal of Philosophy Study》 2018年第3期142-150,共9页
The concept of chaos is present in man from the origins of mankind.Philosophy is alien to this concept and proceeds to speculate about its reality.Both Kant and Borges were not indifferent to this speculation and in t... The concept of chaos is present in man from the origins of mankind.Philosophy is alien to this concept and proceeds to speculate about its reality.Both Kant and Borges were not indifferent to this speculation and in their works,we can find“the effort to explain or to approach”the concept of chaos.Our first aim is to demonstrate in Kant’s The Critique of Judgement,and more precisely in The Analytic of the Sublime,what Kant understands as“chaos.”Our second aim is to establish a relationship between Kant and Borges in some of Borges’tales.Finally,we aim at establishing whether this“language of chaos”can refer to a sort of communication which exceeds logic language,i.e.,a sort of“mute logos.” 展开更多
关键词 CHAOS SUBLIME Kant borges LOGOS
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Poor, Pitiful Monsters From Homer to Borges
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作者 Robin McAllister 《Journal of Literature and Art Studies》 2016年第8期901-904,共4页
This article reviews famous monsters in Western literature that reveal a hidden humanity or affinity with the hero that elicits compassion or emphasizes their bestiality in surprising ways. Their monstrosity is often ... This article reviews famous monsters in Western literature that reveal a hidden humanity or affinity with the hero that elicits compassion or emphasizes their bestiality in surprising ways. Their monstrosity is often a distorted mirror image of the hero's humanity. Shakespeare's Caliban is a famous example of the affinity between monster and protagonist. Homer's Polyphemus, the first monster in Western tradition establishes certain traits that persist through later literature: lawless, barbarian, cannibal, and giant. Polyphemus hates men, but loves his old ram. Grendel, Grendel's mother, and the dragon in Beowulf are giants, lawless, cannibals. The dragon Beowulf dies fighting anticipates the identity between hero and monster that Borges makes explicit in Asterion, the Minotaur. Dante's Satan in the Inferno fails to leave later successors. In Borges's "The House of Asterion" the Minotaur is both monster and hero. Asterion's affinities with other protagonists in Borges' stories suggest that the monster in the labyrinth is not the Minotaur, but the concept of infinity. 展开更多
关键词 MONSTERS HOMER BEOWULF borges
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Borges' Poetics of Visible Unrealities
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作者 Robin McAllister 《Journal of Literature and Art Studies》 2014年第5期338-344,共7页
Close reading and inter-textual analysis of Borges' essays, fiction, and poetry suggest a poetics of visible unrealities, a fiction that calls attention to its own artifice. Borges's poetics of reading and dreaming ... Close reading and inter-textual analysis of Borges' essays, fiction, and poetry suggest a poetics of visible unrealities, a fiction that calls attention to its own artifice. Borges's poetics of reading and dreaming require another poetics of the work as a text that calls attention to its own artifice. In reading Borges' fiction, the separate roles and identities of reader, writer, and work of fiction merge and exchange roles, powers, and identities and are transformed into a single act of dreaming, which assumes cosmogonic and apocalyptic risks. In the dominant role given to the reader, the work of fiction as an object or work of art does not exist unless it is read. There is no determinate text, only a version of our own we re-write and invent every time we read the text. The author's reading is not a spontaneous evocation of vision, but an artifice, as artificial as the writing of the fiction. As writers and readers we are composed of texts and schemata, alphabets and artifacts, not merely mental perceptions and ideas. The reader requires a prior text to copy, translate, and recreate, and that text only exists as a fictional microcosm in so far as it is being read by a Reader who is able to actualize the revelation only imminent within it. 展开更多
关键词 borges POETICS READING BERKELEY
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Infinite Regress and the Illusion of Actuality and Participationin Borges's The Aleph
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作者 Robin McAllister 《Journal of Literature and Art Studies》 2017年第6期656-662,共7页
Borges wants his reader to use imagination to participate in his fiction, to imagine the vision of the universe as anAleph. The vision of the Aleph is paradoxical, impossible, inexpressible--a point in space, in the b... Borges wants his reader to use imagination to participate in his fiction, to imagine the vision of the universe as anAleph. The vision of the Aleph is paradoxical, impossible, inexpressible--a point in space, in the basement of ahouse in Buenos Aires, where all other points in the universe are simultaneously present. The reader sees theAleph--or the illusion of the Aleph, watching it emerge as if through Borges' own eyes, as an unrequited lover andfrustrated poet gradually accommodating the infinite vision to the limitations of actual perception. The illusion ofactual presence the reader evokes seems to include the reader as both a subject reading and an object in the vision.The reader mirrors himself in the enumeration as the reader imaginatively projects associations and expectationsinto the images in order to make sense of them. The reader tries to avoid involving himself in the vision, but theimages the writer presents the reader with are ambiguous, schematic, demanding intervention to try to resolveapparently unresolved contradictions by trying out the different interpretations that may make sense of them. Overand over again in reading the enumeration the reader encounters images that allow him to convert sequence intosimultaneity, part into whole. Other images suggest the presence of infinite, multiple, perspectives on each objectconverging in the Aleph and reveal insights into hidden designs and into secret interiors of structures. The visionthe reader reads must seem to exceed the limits of language and perception. Opposed to images of disintegrationand chaotic dispersal are microcosmic images that suggest a whole reflected or contained in its parts, worldsreflected within worlds by infinite regress. Infinite regress undermines the assumption of a subject and objectdichotomy in the act of reading and enhances the illusion of participation in the vision. Infinite regress, imagewithin image, world within world, is a symmetry that asserts itself against the illusion of the enumeration asapparently random and chaotic and reinforces the illusion of infinite convergence on one point in space. Thesuccess of this illusion depends partly on Borges' success in finding a stylistic formula that encourages the reader toevoke a total, simultaneous vision from a partial, sequential listing of images. The I saw...l saw...l saw formulaprovides a minimal formal order for referring each separate image to the concept of a total vision withoutinterfering with the illusion of actual participation by calling attention too much to the artifice that holds the visiontogether. Just as the separate images of the enumeration threaten to break loose from their minimal syntacticalframe and assume autonomy of their own, so the enumeration itself seems to assume autonomy from its narrativecontext. Within the context of a story of failed mediation in which every attempt at communication is interrupted,aborted, or comically transformed into unanticipated consequences, the reader seems to have resolved the problemof poetics Borges the writer poses to him as a reader. The reader's reading of Borges' fiction is a kind of hypothesisthe reader projects into his words in response to a problem of inexpressibility the writer poses for the reader justbefore he attempts to describe the Aleph. Similarly this fiction requires a certain kind of reader and reading--areader who intervenes in the fiction to complete with our imagination what the writer only hints at or denies, and areader who seeks out those contradictions or refutations in our interpretation that indicates our reading is onlypartial and falsifying, a hypothesis we propose in response to a problem of inexpressibility the writer has posed. 展开更多
关键词 borges Aleph INFINITE REGRESS
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Inarticulateness, Power and Ethnic identity On Jorge Luis Borges' The Gospel According to Mark
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作者 Du Bingyue 《International Journal of Technology Management》 2016年第8期10-11,共2页
This paper attempts to focus on Jorge Luis Borges’ short story The Gospel according To Mark. Borges, an Argentina short storywriter and translator, whose motherland is under long-term western colonization, identifi e... This paper attempts to focus on Jorge Luis Borges’ short story The Gospel according To Mark. Borges, an Argentina short storywriter and translator, whose motherland is under long-term western colonization, identifi es himself unconsciously with the western culture. Hisworks mostly touch upon the themes of religion and philosophy. Along with post-colonialism theory’s springing up, critics began to analyze hisworks from the post-colonial perspective. The author thinks that this short story with religious implication parallels to the cultural invasion in theperiod of colonization, from powerful culture to weaker one. The author, thus, aims to use Michael Foucault’s viewpoints concerning power andknowledge to probe into the western cultural hegemony and ideological invasion refl ected in this story. Besides, the loss and construction of theethnic identity of the colonized will be discussed in details. 展开更多
关键词 Jorge Luis borges power and knowledge inarticulateness Ethnic identity cultural hegemony.
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下肢重复蹬伸至力竭过程中肌肉功能网络拓扑特性
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作者 张陈 冉令华 +4 位作者 呼慧敏 张欣 周子健 徐红旗 史冀鹏 《中国组织工程研究》 CAS 北大核心 2025年第12期2513-2520,共8页
背景:表面肌电已经被广泛用于监测肌肉疲劳,但传统肌电指标通常针对于单块肌肉,无法评价一组肌肉在疲劳过程中的变化。目的:建立肌肉功能网络,提取复杂网络参数,研究不同疲劳程度下的肌肉功能网络拓扑特性变化,为疲劳的监测、预防提供... 背景:表面肌电已经被广泛用于监测肌肉疲劳,但传统肌电指标通常针对于单块肌肉,无法评价一组肌肉在疲劳过程中的变化。目的:建立肌肉功能网络,提取复杂网络参数,研究不同疲劳程度下的肌肉功能网络拓扑特性变化,为疲劳的监测、预防提供理论和方法依据。方法:11名受试者进行直到力竭的50%1RM单腿下肢蹬伸运动,同步采集股直肌、股外侧肌、股内侧肌、股二头肌长头、胫骨前肌、腓肠肌外侧肌、腓肠肌内侧肌7块肌肉的肌电信号,以及心电信号和Borg CR-10量表评分;根据Borg CR-10量表评分划分为轻度、中度和重度三个疲劳阶段,采用心率和心率变异性验证疲劳阶段划分的有效性;以7块肌肉为节点,使用肌肉信号的相干性构建肌肉功能网络,提取聚类系数、平均加权度、全局效率、特征向量中心性4个复杂网络参数;提取肌电信号的均方值振幅、中位频率、瞬时平均频率和共激活比4种指标,并在3种疲劳程度下进行比较。结果与结论:①3种疲劳阶段在心率及心率变异性上产生显著性差异,证明了疲劳阶段划分的有效性;②对于不同肌肉在3种疲劳程度下的肌电指标:均方值振幅和共激活比未表现出差异,中位频率在股外侧肌、股内侧肌和股二头肌长头表现出稳健的疲劳趋势,瞬时平均频率则在股直肌、股外侧肌、股内侧肌和股二头肌长头表现出稳健的疲劳趋势;瞬时平均频率的性能优于中位频率和均方值振幅,但三者仅在主要工作肌群能够获得较好的稳健趋势,共激活比不受疲劳因素的影响;③股外侧肌-股内侧肌、股外侧肌-股二头肌长头、股外侧肌-腓肠肌内侧肌和股内侧肌-股二头肌长头连接强度逐渐增加,平均加权度、聚类系数和全局效率在疲劳后表现出显著差异,并且与疲劳程度之间显著相关。结果表明:肌肉功能网络内的连通强度变化能够反映疲劳过程中肌肉间的协同性和互补性;聚类系数、平均加权度、全局效率可作为一组肌肉疲劳的监测指标。 展开更多
关键词 肌肉功能网络 下肢蹬伸 膝关节 肌电 Borg CR-10量表 疲劳 运动损伤 复杂网络指标 相干性
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Imitation and Transgression: Ge Fei's Creative Use of Jorge Luis Borges's Narrative Labyrinth
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作者 Qingxin Lin 《Fudan Journal of the Humanities and Social Sciences》 2015年第4期649-669,共21页
This paper attempts to trace the influence of Jorge Luis Borges on Ge Fei. It shows that Ge Fei's stories share Borges's narrative form though they do not have the same philosophical premises as Borges's to support... This paper attempts to trace the influence of Jorge Luis Borges on Ge Fei. It shows that Ge Fei's stories share Borges's narrative form though they do not have the same philosophical premises as Borges's to support them. What underlies Borges's narrative complexity is his notion of the inaccessibility of reality or divinity and his understanding of the human intellectual history as epistemological metaphors. While Borges's creation of narrative gap coincides with his intention of demonstrating the impossibility of the pursuit of knowledge and order, Ge Fei borrows this narrative technique from Borges to facilitate the inclusion of multiple motives and subject matters in one single story, which denotes various possible directions in which history, as well as story, may go. Borges prefers the Jungian concept of archetypal human actions and deeds, whereas Ge Fei tends to use the Freudian psychoanalysis to explore the laws governing human behaviors. But there is a perceivable connection between Ge Fei's rejection of linear history and traditional storyline with Borges' explication of epistemological uncertainty, hence the former's tremendous debt to the latter. Both writers have found the conventional narrative mode, which emphasizes the telling of a coherent story having a beginning, a middle, and an end, inadequate to convey their respective ideational intents. 展开更多
关键词 Ge Fei - Jorge Luis borges . Narrative gap . Narrative labyrinthFreudian psychoanalysis . Jungian archetypes
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探讨心肺康复运动训练在慢性阻塞性肺疾病稳定期患者中的应用效果 被引量:1
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作者 李燕凤 赵雪玲 +2 位作者 汤伟妹 林淑慧 王鑫燕 《中国现代药物应用》 2023年第14期177-180,共4页
目的观察心肺康复运动训练在慢性阻塞性肺疾病(COPD)稳定期患者中的应用效果。方法120例COPD稳定期患者,以随机数字表法分为对照组和研究组,每组60例。对照组予以常规康复指导,研究组予以心肺康复运动训练。比较两组患者干预前后的肺功... 目的观察心肺康复运动训练在慢性阻塞性肺疾病(COPD)稳定期患者中的应用效果。方法120例COPD稳定期患者,以随机数字表法分为对照组和研究组,每组60例。对照组予以常规康复指导,研究组予以心肺康复运动训练。比较两组患者干预前后的肺功能指标(呼吸频率、血氧饱和度、静脉血氧分压、最大通气量、6 min步行距离)水平、Borg呼吸困难指数评分以及肺功能康复效果、2个月内急性发作情况。结果干预后,两组患者呼吸频率、Borg呼吸困难指数评分均低于干预前,血氧饱和度、静脉血氧分压、最大通气量、6 min步行距离均高于对照组,且研究组患者呼吸频率(19.31±1.27)次/min、Borg呼吸困难指数评分(1.41±0.37)分低于对照组的(22.16±1.86)次/min、(2.17±0.45)分,血氧饱和度(98.92±0.38)%、静脉血氧分压(92.51±2.48)mm Hg(1 mm Hg=0.133 kPa)、最大通气量(54.58±5.73)L/min、6 min步行距离(429.27±51.01)m均高于对照组的(96.51±0.71)%、(90.42±2.06)mm Hg、(51.42±4.91)L/min、(398.54±47.11)m,差异均具有统计学意义(P<0.05)。研究组患者肺功能康复总有效率100.00%高于对照组的90.00%,2个月内急性发作率1.67%低于对照组的13.33%,差异具有统计学意义(P<0.05)。结论给予COPD稳定期患者心肺康复运动训练指导,可显著改善患者肺功能指标,减轻呼吸疲劳程度,获得理想的康复效果,并有效的减少干预后的急性发作率,效果理想。 展开更多
关键词 心肺康复运动训练 慢性阻塞性肺疾病 稳定期 肺功能 Borg呼吸困难指数
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SBL与WLL对肺泡蛋白沉着症患者肺功能、Borg评分及血气指标的影响
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作者 许方 《当代医药论丛》 2023年第3期94-97,共4页
目的:分析比较分段肺泡灌洗(SBL)与全肺灌洗(WLL)对肺泡蛋白沉着症患者肺功能、Borg评分及血气指标的影响。方法:选择2020年1月至2022年6月某院收治的肺泡蛋白沉着症患者20例参与研究,并随机平均分入对照组和观察组中。对照组给予SBL治... 目的:分析比较分段肺泡灌洗(SBL)与全肺灌洗(WLL)对肺泡蛋白沉着症患者肺功能、Borg评分及血气指标的影响。方法:选择2020年1月至2022年6月某院收治的肺泡蛋白沉着症患者20例参与研究,并随机平均分入对照组和观察组中。对照组给予SBL治疗,观察组给予WLL治疗。对比两组的肺功能指标、Borg评分、6 min步行距离、血气指标、灌洗液使用量、灌洗液回收率、并发症的发生情况及治疗后病灶的吸收情况。结果:经统计学分析,治疗后两组组间一氧化碳弥散量(DLCO)、第一秒用力呼气容积(FEV1)、用力肺活量(FVC)、最大通气量(MVV)实测值与预计值的比值对比有差异,观察组均更高,P<0.05;治疗后两组组间的Borg评分、6 min步行距离、动脉血氧分压(PaO2)、血氧饱和度(SaO2)对比有差异,观察组的Borg评分更低,6 min步行距离更远,PaO2、SaO2均更高,P<0.05;两组的灌洗液使用量、灌洗液回收率、并发症发生率、治疗后病灶吸收率对比有差异,观察组的灌洗液使用量、灌洗液回收率、治疗后病灶吸收率均更高,并发症发生率更低,P<0.05。结论:在肺泡蛋白沉着症的治疗中,WLL较SBL更能有效提高患者的肺功能和血气指标,降低Borg评分,增加6 min步行距离,促进病灶吸收,且灌洗液回收率更高,并发症发生率更低。 展开更多
关键词 分段肺泡灌洗 全肺灌洗 肺泡蛋白沉着症 肺功能 Borg评分 血气指标
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手臂静态姿势负荷的肌电实验研究 被引量:18
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作者 葛树旺 陈松林 +3 位作者 付圣灵 朱宏宇 宋昱 杨磊 《工业卫生与职业病》 CAS CSCD 北大核心 2008年第4期220-223,共4页
目的利用表面肌电术和Borg量表来测定、评价手臂静态姿势负荷,为工效学设计提供参考。方法14名男性大学生志愿者为对象,右臂以不同角度和距离做上抬、外展和前伸静态姿势,测定此间肱桡肌、肱二头肌、三角肌和斜方肌的表面肌电信号。肌... 目的利用表面肌电术和Borg量表来测定、评价手臂静态姿势负荷,为工效学设计提供参考。方法14名男性大学生志愿者为对象,右臂以不同角度和距离做上抬、外展和前伸静态姿势,测定此间肱桡肌、肱二头肌、三角肌和斜方肌的表面肌电信号。肌电幅度以最大自主收缩肌电百分比(MVE%)来表示。用Borg量表对不同姿势的主观疲劳程度评分。对肌电幅度与Borg量表评分进行Pearson相关分析。结果各肌群的肌电幅度、疲劳评分随上抬和外展角度以及前伸距离的增大呈上升趋势。表面肌电MVE%与Borg量表评分之间相关性显著。结论表面肌电和Borg量表评分能够反映肌肉的静态姿势负荷与应激,两者有明显的相关性。在所测定的肌肉中,以三角肌和斜方肌受累最为显著。 展开更多
关键词 静态姿势 劳动负荷 表面肌电术 Borg量表
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不同Borg评分患者临床特征及Borg评分对呼吸系统疾病的预后价值 被引量:15
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作者 张勇 周鹏 +1 位作者 刘涛 陈萍 《成都医学院学报》 CAS 2021年第4期512-515,共4页
目的比较呼吸与危重症医学科住院患者不同Borg评分的临床特征,探讨Borg评分的预后价值。方法选取2016年1月至2020年1月于彭州市人民医院呼吸与危重症医学科住院的245例患者为研究对象,根据Borg评分将患者分为0分组(n=90)、1~3分组(n=48)... 目的比较呼吸与危重症医学科住院患者不同Borg评分的临床特征,探讨Borg评分的预后价值。方法选取2016年1月至2020年1月于彭州市人民医院呼吸与危重症医学科住院的245例患者为研究对象,根据Borg评分将患者分为0分组(n=90)、1~3分组(n=48)、4~6分组(n=71)、≥7分组(n=36)4组。比较4组患者临床特征,并探讨Borg评分对呼吸系统疾病的预后价值。结果与0分组、1~3分组相比,4~6分组、≥7分组患者年龄更大(P<0.05);合并高血压、慢性阻塞性肺疾病(COPD)者更多(P<0.05)。与其他3组相比,≥7分组住院时间更长(P<0.001);出院1年呼吸困难再次住院率更高(P<0.05)。COPD、高血压、Borg≥7分为发生出院1年呼吸困难再次住院的独立危险因素。结论不同Borg评分有不同的临床特征,Borg评分与呼吸系统疾病预后具有相关性。针对呼吸系统疾病,建议有条件的医院对患者常规进行Borg评分评估,应重点关注Borg≥7分的人群,尤其是合并COPD和高血压的患者。 展开更多
关键词 Borg评分 老年 呼吸系统疾病 预后
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肺康复治疗对稳定期慢性阻塞性肺疾病病人的疗效分析 被引量:17
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作者 陈艳 方继荣 李风雷 《临床肺科杂志》 2010年第4期453-454,共2页
目的观察肺康复治疗对稳定期慢性阻塞性肺疾病(Chronic obstructive pulmonary disease,COPD)患者的效果。方法测定以下肢训练为主的社区康复治疗前后患者的FEV1(第一秒用力呼气量占预计值百分比)、6 min步行距离、呼吸困难评分(Borg评... 目的观察肺康复治疗对稳定期慢性阻塞性肺疾病(Chronic obstructive pulmonary disease,COPD)患者的效果。方法测定以下肢训练为主的社区康复治疗前后患者的FEV1(第一秒用力呼气量占预计值百分比)、6 min步行距离、呼吸困难评分(Borg评分)、年人均急性发作次数、年人均住院次数。结果肺康复治疗前后的FEV1、6 min步行距离、Borg评分明显好于治疗前(P<0.05),年COPD急性发作次数及住院次数治疗前后有统计学意义。结论肺康复治疗可改善COPD患者的呼吸功能,减少年均急性发作次数及住院次数。 展开更多
关键词 COPD 肺康复 6 min步行距离 Borg评分
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6 min步行试验和评分量表评估COPD的预后 被引量:31
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作者 覃松梅 邓艺新 +1 位作者 刘航 覃雪军 《临床与病理杂志》 CAS 2021年第10期2395-2399,共5页
目的:探讨中、重度慢性阻塞性肺疾病急性加重期(acute exacerbations of obstructive pulmonary disease,AECOPD)患者肺功能、6 min步行试验(six-minute walk test,6MWT)和COPD评估测试(chronic obstructive pulmonary disease assessme... 目的:探讨中、重度慢性阻塞性肺疾病急性加重期(acute exacerbations of obstructive pulmonary disease,AECOPD)患者肺功能、6 min步行试验(six-minute walk test,6MWT)和COPD评估测试(chronic obstructive pulmonary disease assessment test,CAT)的相关性及临床意义。方法:选择2019年1月至12月在广西壮族自治区人民医院呼吸与危重症医学科住院治疗的75例中、重度AECOPD患者(中度14例,重度31例,极重度30例),入院后第2天下午由经过培训的专职护士进行肺功能检查、CAT评分、6MWT及6MWT结束或中断后的呼吸困难评分(BORG评分),并如实记录结果。结果:肺功能分级越重,6 min步行距离(six-minute walk distance,6MWD)越短,FEV1%越低,则BORG、CAT评分越高,且6MWD中断发生率越高,在极重度患者中6MWD发生率为93.3%;CAT分级与肺功能分级之间呈正相关(P<0.01);CAT分级与6MWD之间呈负相关(P<0.01),6MWD与FEV1%呈正相关(P<0.01);ROC曲线显示:6MWD<234 m、BORG评分>6.5、CAT>24时,为预测未来急性加重风险的最佳值。结论:CAT和6MWT联合可综合评估中、重度AECOPD住院患者治疗前病情严重程度、运动和生活自理能力,及指导康复治疗方案。 展开更多
关键词 慢性阻塞性肺疾病 CAT评分 6分钟步行试验 BORG评分 肺功能
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BORG主观体力感等级量表的生理效度研究:一项元分析 被引量:37
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作者 麦雪萍 王磊 《广州体育学院学报》 CSSCI 北大核心 2012年第3期78-83,共6页
为了明确Borg主观体力感等级量表(简称RPE)的实际效度,尤其是与心率、血乳酸、最大摄氧量(%)、摄氧量、乳酸阈、呼吸频率等的生理效度。通过使用元分析为主要手段,对主观体力感与各项生理参数之间的关系进行整合分析。结果表明:主观体... 为了明确Borg主观体力感等级量表(简称RPE)的实际效度,尤其是与心率、血乳酸、最大摄氧量(%)、摄氧量、乳酸阈、呼吸频率等的生理效度。通过使用元分析为主要手段,对主观体力感与各项生理参数之间的关系进行整合分析。结果表明:主观体力感等级与心率的加权平均效度系数为0.55,血乳酸为0.61,最大摄氧量(%)为0.65,摄氧量为0.59,通气阈为0.68,呼吸频率为0.75,其量表的总体效度并不像以往研究所提出的那样高(r=0.80-0.95)。同时,在不同的研究特征下,通过方差分析表现出较大的统计学差异,文中将对不同研究特征下的相关效度进行论述。 展开更多
关键词 Borg等级量表 生理指标 元分析 效度系数
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基于高维多目标优化的给水管网设计方法——以意大利Fossolo小镇管网为例 被引量:2
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作者 熊柳 王琦 +2 位作者 王志红 蒋浩 吉瑞博 《给水排水》 CSCD 北大核心 2018年第5期114-120,共7页
给水管网优化设计是一个多变量、非线性的多目标组合优化问题。对优化方案的选择会直接影响工程的投资。因此,在决策阶段有效平衡各个优化目标之间的内在关系,以实现综合效益最优尤为重要。基于高维多目标优化模型提出一种给水管网设计... 给水管网优化设计是一个多变量、非线性的多目标组合优化问题。对优化方案的选择会直接影响工程的投资。因此,在决策阶段有效平衡各个优化目标之间的内在关系,以实现综合效益最优尤为重要。基于高维多目标优化模型提出一种给水管网设计的新方法。首先,将多个工程设计需求作为模型中的优化目标,建立给水管网设计的高维多目标模型;然后,使用高维多目标进化算法Borg求解上述模型得到Pareto最优解;最后,利用双基点法(TOPSIS)对Pareto最优解进行排序得到综合效益最优的设计方案。基于意大利Fossolo小镇的管网设计问题,通过比较高维多目标模型与传统的多目标模型(仅考虑成本和管网系统可靠性指标)获得的最优方案,证明了基于高维多目标优化的设计方法能为决策阶段提供更多综合效益占优的备选方案,从而提高给水管网设计的合理性。 展开更多
关键词 给水管网 高维多目标优化 PARETO最优解 Borg算法 双基点法
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