对小波图像去噪方法的探讨   总被引：2，自引：0，他引：2  

张莉  杨国梁 《桂林师范高等专科学校学报》2005,19(1):110-113

小波图像去噪方法已广泛应用于图像去噪领域．在对日前小波图像去噪文献进行综合的基础上，描述了信号奇异性，并阐述了三种基于小波阈值去噪的方法，最后对小波去噪方法进行了一些展望．  相似文献   

论关联性在隐喻中的表现     

谢章华  李德华 《怀化学院学报》2007,26(6):83-84

隐喻的相似性构成了隐喻的基础,为理解隐喻提供了方便.但Sperber ＆ Wilson在专著Relevance：Communication and Cognition一书中提出了最佳关联原则,能更有力的解释隐喻,为隐喻的理解提供了新思路,然而究其实质,隐喻的相似性正是最佳关联性在隐喻中的表现,隐喻的理解实际上是寻求隐喻的的相似性,而寻求隐喻相似性的过程就是寻求本体和喻体的最佳关联.  相似文献   

Children’s emotional and behavioral responses to peer provocation and early school adjustment     

Maria S. Poulou  Hideko H. Bassett 《Pastoral Care in Education》2018,36(3):205-222

ABSTRACT

Even very young children think about their own and others’ behavior, including emotions. Such cognitions and emotions about the self and others convey information that is crucial to social interactions and relationships. The current study based on an integrated model of emotion processes and cognition in social information processing (SIP) aimed to explore students’ emotional and behavioral responses in SIP choices, and their association with teacher-reported early school adjustment. Two-hundred and thirty pre-school and first-grade primary school students were interviewed using the Challenging Situations Task (CST). CST assessed students’ emotional and behavioral responses to 12 unambiguous hypothetical peer provocation situations. Children’s preschool and first-grade primary teachers rated children’s early school adjustment with the Social Competence and Behavior Evaluation (SCBE-30) measure. The results revealed that children chose mainly sad and angry emotions and socially competent and passive behaviors. We found a relationship both between sad emotions and socially competent behavior choices, and between angry emotion and aggressive behavior choices. Sad emotions and aggressive behavior choices were the main predictors of school adjustment. Children’s responses to peer provocation situations varied depending on how the children interpreted the situations. The results address the importance of children’s SIP and school adjustment.  相似文献   

利用平衡条件求物体运动的速度——浅谈物体运动速度的一种解法及相关物理过程的分析     

张许平 《西安文理学院学报》2001,16(3):50-51,54

本文就高中物理中求物体运动的速度这一问题进行探讨,通过举例,分析了力学和电学中利用平衡条件求物体运动的速度这一方法的难点.总结了这一方法应满足的基本条件--物体受到的力中至少有一个力与速度有定量关系,指导学生学习.  相似文献   

宏编程技术探析及其在数控中工中的应用     

林红梅 《闽西职业技术学院学报》2007,9(2):54-58

探析了宏编程技术及其扩展数控系统功能的使用。通过例子阐述了数控加工中采用宏编程技术的重要作用,为解决一些特殊及复杂零件的加工程序编制问题提供了思路。  相似文献   

Observations on the temporal correlates of reading failure     

Raymond M. Klein 《Reading and writing》2002,15(1-2):207-231

The definitions of developmental dyslexia andtemporal processing are discussed and severalconstruals of what a temporal processingdeficit might entail are illustrated. Then,using a framework developed by Farmer & Klein(1995), the proposal that a temporal processingdeficit (in vision, audition, or both) might bethe root cause of some proportion of cases ofdevelopmental dyslexia is introduced andvarious research strategies for testing thisproposal are identified. The symposium paperswhich address this general question using arange of these strategies are then criticallyreviewed. It is noted that whereas reading isa recent artifact not yet subject to any directselection pressure, its normal performancerequires the use of, and connections between,the highly evolved modules for visual patternrecognition and language. Within vision andlanguage redundant coding, which permitsperformance in the face of injuries anddegraded input, also makes it difficult todetect subtle deficits (whether temporal, ornot) unless precise tests are used. Yet suchdeficits may degrade performance on tasks (suchas reading) which require the non-copiousconnections between vision and language. Theefficacy of this pathway, I suggest, ismeasured by performance on the rapidautomatized naming (RAN) test.  相似文献   

用正交试验选择FA-Ⅱ氯酸钠电解槽最佳工艺条件     

郑建美  刘华 《福建师大福清分校学报》2004,(2):54-58

本文探讨了在FA-Ⅱ氯酸钠电解槽中,电解氯化钠溶液制备氯酸钠的适宜工艺条件.采用正交试验方法,考察了电流密度、电解液PH值、电解温度、氯化钠含量等对电解电耗的影响,确定了FA-Ⅱ电解槽最佳工艺条件.  相似文献   

统计/判决电路在通信电子实验教学中的应用     

金立  邓永丽 《实验室研究与探索》2006,25(5):603-606

鉴于通信电子技术课程的教学现状,提出了依据统计/判决电路来设计通信电子实验,在8分频的前提下,该电路可以在改进系统通信质量方面起到一定的作用,如改善信噪比,降低误码率,提高系统抗干扰性。通过对该电路的设计、制作和调试,学生能掌握诸如香农公式、数字信号最佳接收等理论知识。能较好实现培养理论和实际动手能力相结合的教学要求。  相似文献   

Optimal Design for Two-Level Random Assignment and Regression Discontinuity Studies     

Christopher H. Rhoads  Charles Dye 《Journal of Experimental Education》2016,84(3):421-448

An important concern when planning research studies is to obtain maximum precision of an estimate of a treatment effect given a budget constraint. When research designs have a multilevel or hierarchical structure changes in sample size at different levels of the design will impact precision differently. Furthermore, there will typically be differential costs of enrolling additional units at different levels of the hierarchy. The optimal design problem in multilevel research studies involves determining the optimal sample size at each level of the design given specified design parameters and a specified marginal cost of recruitment at each level. The current work extends existing results by considering optimal design for (a) unbalanced random assignment designs and (b) regression discontinuity designs.  相似文献   

椭球加工的两种数控编程方法及其比较   总被引：1，自引：0，他引：1  

朱文艺  管永涛  徐尤才  何萍 《武汉工程职业技术学院学报》2006,18(4):1-5

结合一个具有椭半球轮廓的工件，分别用用户宏程序编程和自动编程两种方法进行编程，并对两个数控程序进行了仿真加工和比较，最终得出两种编程方法各自的优缺点及其适用范围，为合理选择零件的数控编程方法提供参考。  相似文献