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1.
对人工神经BP(BACKPROPAGATON)网的梯度算法及同伦算法进行了分析,据此提出了兼具二者优点的新算法──快速同伦BP算法。根据这一算法开发了通用快速同伦BP算法QHBP程序,并对两组不同的样本进行了训练。两算例表明快速同伦BP算法在计算速度及计算精度方面均有很大程度的提高。因此,快速同伦BP算法具有极高的实用性。  相似文献   

2.
确定两船或多船会遇中潜在的可能碰撞危险是正确判断碰撞危险的关键之一。本文从信息论理论出发,采用模糊数学原理提出了一种评估碰撞危险的新方法。该方法考虑了目标船行动的不确定性以及多船会遇中存在的危险性推理碰撞危险度,能真实地反映出驾驶人员在决定采取避让行动过程中的操船心理,因此能直接作为在两船或多船会遇中采取避让行动的依据。  相似文献   

3.
在对SIEMENSS7-200系列PLC的专用编程软件STEP7的功能和特点进行归纳的基础上,介绍了应用STEP7语言实现SIMATICS7-200PLCI/O口传输并行打印数据的编程技术关键。  相似文献   

4.
为了满足GMDSS的要求,扫描接收机必须与DSC和NBDP终端密切配合,扫描要迅速可靠。目前我国有关部门和企业正在研制开发这种扫描接收机,笔者通过对国外两种典型的扫描接收机(R8001,NRD-720)微机控制系统的比较分析,找出了它们的共同点及其差异,并通过实验作了一些理论探讨。  相似文献   

5.
运动员某些生理,生化指标的时间生物学特征探讨   总被引:1,自引:0,他引:1  
对26名男性运动员的环磷酸腺苷(cAMP)、环磷酸鸟苷(cGMP)、可的松(Cortisol)、睾丸酮(T)在24小时内的不同时刻的量变的研究,以探讨其时间生物学特征,为运动员选材提供依据。结果发现cAMP、Cortisol、T均表现出明显的近似昼夜节律(P<0.05),cGMP不具有昼夜节律(P>0.05),cAMP的峰相位处于上午8时左右,Cortisol、T的峰相位与cAMP基本同步。可的松的节律稳定性好,可作为判定机能调整幅度的标志节律。  相似文献   

6.
】实验结果表明:在过度训练情况下,心肌细胞浊肿、线粒体肿胀、内质网扩张、毛细血管、闰盘损害等形态学改变是心肌损害的组织学特征。线粒体有氧代谢酶系(SDH,CCO,GDH,ICDH等)活性下降,胞液无氧酵解酶系(LDH,α-GPDH)等早期活性上升后期下降表明心肌严重缺氧与损害。毛细血管病多出现早和重,其标志酶(AKP,5′-N)活性下降,表明毛细血管的形态和功能改变是缺氧性损害的一个重要环节。闰盘的损害可能是过度训练时心电图改变的组织学基础之一。  相似文献   

7.
TWOKINDSOFCOMPETENCEINCOLLEGEENGLISHTEACHING李小飞刘舟Therehasbeena"PendulumPhenomenon"betweenlinguisticcompetenceandcommu-nicativ...  相似文献   

8.
DTOS系统是“不定期船动态报价系统”的简称,是一种建立在明确的因果关系之上的动态模型。它能随时反映各种市场关系的时间因素,使我们能更好地理解不定期船市场中各种随时间变化的市场行为,它有助于掌握不定期船市场的变化规律,提高我们的经营决策水平。  相似文献   

9.
通过利用差热分析技术对油品添加剂M0DTC的热氧化稳定性研究,发现含有支持烷基的M0DTC1和M0DTC2具有较高的热分解温度,M0DTC2的加入量仅0.1%,便具有明显的高温抗氧作用,加入量的增加并不改变其抗氧性能。  相似文献   

10.
本文用SCMAR程序处理了H3PO4各级电离常数的PH滴定数据,得到了和文献值非常一致的结果。利用附加SCDP作图程序得到了相应的滴定曲线和各型体PH分布曲线。通过对实验数据的处理及对结果的分析,讨论了该研究在分析化学中的应用。  相似文献   

11.
Since the late 1960s,culture has been considered tighter with communication.Culture IS based on the community of communication.Communication involves people and their environment.Thus culture is an important factor in communication.Today with modem economic and technological development,intercultural communication is mole important than ever before. When people from different cultural background communicate with each other,their social stereotype pattern of behavior, their habits of language and thought differ from one another,because these are the possible factors that affect intercultural communications.Culture norms also change,culture may be transferred as signs but we have to study and understand the above carefially.  相似文献   

12.
The thesis mainly discusses the character of the heroine in Charlotte Brontes famous novel "Jane Eyre". There are three major parts-introduction,analysis which is the main body of the thesis,and conclusion.Jane Eyre,the heroine,is a new woman image who requires independence equality and freedom.The thesis just analyzes Janes these rebellious characters through four peroods of her experiences.First,in her childhood,she has shown her rebellious spirit.As an orphan,Jane suffers a lot of misery.Not only her aunt treats her cruelly,her cousins despise her,but also do servants have a prejudice against her.In Janes immature heart, she is unwilling to bear ill treatment.She rebels them bravely.Second,when she studies at Lowood,her rebellious spirit is exposed furtherly.Her view doest stay in Mrs Reeds,instead turns to the whole society.She makes hypocrisy of so-called charity to be discovered completely.At the same time,she declares her independent,equal rebellious thought to her friend-Helldn who endures oppression willingly.Third,she,as a governess in Thornfield Hall falls in love with Rochester-her master.During this period,her thought grows into maturity.Thought she loves him passionately,she never loses her dignity and independence for him.When she knows his mad wife still lives,she makes up her mind to leave him.For she doesnt want to become his mistress.Fourth,her refusal of St Johns proposal of marriage depicts Janes character.She knows John does not love her at all and his purpose of marriage is only to perform his great task missionary.Jane does want to become a sacrifice.She breaks traditional morality,then she goes back to Rochester.  相似文献   

13.
The context of a word consists of the other words surrounding it and the situation in which it is used.When we come across a new word in our reading,instead of looking it up in a dictionary for its definition,we can guess its meaning from its context.  相似文献   

14.
当代中国武术经历了时代的沧桑和变迁,在历经了文化和历史的发展与洗礼之后,依然发展、繁衍至今。在这样一个漫长的过程中,伴随着以社会环境和社会人群价值取向为主的变迁与变化,当代中国武术的发展与当代社会的发展正逐渐的呈现出某些相背离和不和谐的表象。通过研究,我们发觉中国武术中原本一些内在的东西正在不断的被遗忘,正在不断的流逝。本文试从中国武术在当代发展中的问题境域入手,解读中国武术在当今世界和社会中存在的一些问题,希望能够从中找到中国武术发展的"合法性"或"合时性"的内在依据,以挺立中国武术的脊梁。  相似文献   

15.
Introduction Whatisculture?Toputitsimply,culturemeansthe totalwayoflifeofaperson.Thissimpledefinitionimplies thatculturereferstothepattersofcustoms,traditions,socialhabits,values,beliefsandlanguageofasociety.As cultureissoinclusive,itincludesvirtuallyeverythingthat agroupofpeoplethink,say,doandmake.Followingthedefinitionofsociologists,theterm culturereferstothetotalpatternofbeliefs,customs,institutions,objects,andcharacterizesthelifeofhuman community.“Cultureconsistsofallthesharedproductsof …  相似文献   

16.
"Midnight"is a poem written by Archibald·Lampman,a Canadian poet,who loved nature very much,but his poor health prevents him from being very active in the outdoor life.So he is often the quite,thoughtful observer of nature in his poems.This article mainly talks about how to appreciate the poem in the following aspects:word selecting,rhyme,sentence structure and atmosphere.After reading this poem,we cannot get rid of the air of horror and mystery."Midnight" reveals another aspect of the nature:wild,rough and unknown.There is something else in the nature that can awe human beings even though we don't know what it is.  相似文献   

17.
Chapter Ⅰ Introduction Sitting in the rocking chair,Carrie dreams her future.This is the deep impression the novel"Sister Carrie"gives us,which is written by Theodore Dreiser(1871-1945),the great American realism writer.  相似文献   

18.
国外锻炼行为理论研究综述   总被引:22,自引:2,他引:22  
正确认识和促进与健康有关的锻炼行为必须以合理的理论为基础。对国外锻炼心理学领域与健康有关的锻炼行为理论和模型:健康信念模型、保护动机模型、合理行为模型、计划行为模型、自我决定模型、社会认知模型、自我效能模型和跨理论模型进行分析,评价其成功和不足的地方。在前人研究的基础上提出态度-行为综合模型作为研究锻炼行为参与新的研究方向。  相似文献   

19.
我国普通高等院校体育教育效果调查与分析   总被引:8,自引:0,他引:8  
以全国高等教育科学"十五"规划重点课题<对我国普通高校体育教育效果的调查>调查结果为依据,通过调查大学生对高校体育教育的态度、认识水平、学习的获得和养成性等方面情况,分析了21世纪初以"健康第一"为指导思想的高校体育教育对在校大学生的作用和影响,发现和揭示了高校体育教育过程中存在于深层与潜在的问题,并以此为基础,对高等学校体育教育的效果进行客观评价,为推进高等院校体育的进一步改革提供依据.  相似文献   

20.
同义词的语用研究   总被引:1,自引:0,他引:1  
从语义学的角度来研究同义词只是同义词研究的出发点和基础,我们必须在此基础上进一步研究在实际的语言交流和运用中如何得体而恰当地运用同义词。同义词的语用研究把同义词的研究范畴从传统的语义学研究范畴延伸到了语用学、修辞学、心理学等研究范畴,因为这些学科本身就是密切联系的。只有这样,同义词———这些看似“相似的词语”才能有用武之地,才能丰富和美化我们的表达,使我们的语言表达准确而得体。  相似文献   

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