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Search Results: 1 - 10 of 166192 matches for " 胡宏林 "
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两类飑线物理量参数垂直分布的差异
秦元明,
气象 , 1992, DOI: 10.7519/j.issn.1000-0526.1992.02.006
Abstract: 本文统计了1980—1989年发生在吉林省境内产生降雹和雷雨大风的两类强飑线的物理量参数垂直分布特征,给出了其间的差异。
投稿—基于stroop效应和snarc效应的大数量自动加工研究
,熊哲
心理科学 , 2014,
Abstract: 在数字自动加工研究中,已有研究的实验对象一般局限在小数量数字上,大数量数字加工中是否也存在自动激活现象尚未获得实验证据。本研究以大数量为研究对象,以stroop效应和snarc效应为自动加工的指标,实验一发现,无论是数字语义比较还是数字个数比较,都出现了典型的数字stroop效应;实验二的结果表明,在大数量个数的比较任务中存在snarc效应和顺序效应。由实验结果初步推断,在大数量加工中也存在无关维度数量信息的自动激活。
数能力的模块性——Dehaene的“神经元复用”理论述评
,熊哲
华东师范大学学报(教育科学版) , 2008,
Abstract: 针对人类算术能力的本质与起源问题,近年来,Dehaene等提出的“神经元复用”理论认为人类的数能力依赖于大脑中预存的神经回路,这种回路的可变性使其预存的倾向性发生变化,从而可以表征数字的近似量,并能够进行精确的数学计算。本文简要介绍了在该理论基础上提出的认知模型——三重编码模型和相应的神经模块理论——顶叶三回路共存说以及相关的比较心理学和发展心理学方面的经验证据,并对该理论存在的问题予以评析。
艾灸列缺穴治疗虚寒性痛经的临床观察
杜琳,,
中国中医药信息杂志 , 2004,
Abstract:
时间赋义对数字空间表征的影响:来自数字线估计任务的证据
,熊哲
- , 2018,
Abstract: 摘要: 数字线估计任务的大量研究以纯数字为研究对象而忽视了赋义数字。本研究以Siegler等的数字线估计任务为原型,探讨在对数字时间赋义条件下小学二、四和六年级儿童的数字表征形式是否发生变化。结果表明,小学二年级是0-1000范围内数字表征从对数形式转换为线性形式的转折点,对数字赋予时间含义后,三个年级均出现了赋义效应。在线性模型和对数模型中时间赋义的作用相反,时间赋义表现出抑线升对(抑制线性模型提升对数模型解释力)的效果。
Abstract: The representation and processing of pure numbers are studied extensively and previous findings indicated that results of number-line estimation of younger children conform to Fechner's law, that is to say the estimation results increase logarithmically with the increase of the actual number for smaller children, while the estimation results increases linearly for older children in the same number range. But the limitation of this study field is that representation of concretized numbers is nearly ignored. SNARC effect revealed that subjects responded to large numbers faster with the right hand than with the left hand, whereas the reverse held true for small numbers. Based on the hypothesis of mental number line, the researchers developed a number line estimation task to explore the law of number representation and development. In this task, the subjects are presented with a line with numbers on both ends (e.g., 0 and 100), and ask the subjects to determine the position of the number (e.g., 70) on the line. At present, there are two different views on the processing mechanism of time, space and quantity. The first point of view proposes that the processing of the three kinds of information share the common processing mechanism. The representative theory of first point of view is ATOM (A Theory Of Magnitude) proposed by Walsh (2003), which considers that the processing of time, space and quantity depends on a single representation mechanism. Another view is the multi representation system, which holds that the processing of time, space and number are domain-specificity, and each kind of information processing has the unique representation and transformation mechanism. Number representation and processing are handled by a non-abstract system, which processes numbers according to specific situations. So, a lot of studies in the past utilizing the number line estimation task almost ignored the concretized meaning of numbers, that is to say ignoring the difference between pure numbers and concretized numbers. In current study, Siegler’s(2003) number line estimation task is used as prototype to explore the change of number representation from grade two to grade six under the condition of concretized time by appending time unit (秒, 小时) to pure numbers. When the number is given meaning, the numerical semantic information is
数字表征的表象赋义效应:来自数字线估计任务的证据
,熊哲
- , 2017,
Abstract: 摘要: 已有研究中数字线估计任务几乎都使用纯数字。本研究以二到六年级儿童为被试,采用纯数字任务和赋义数字任务来探索赋义表象对数字表征形式的影响。结果表明,对0-1000的数字赋义后,对数模型对赋义数字的解释力上升,而线性模型的解释力下降;表象大小对于赋义数字的估计影响显著,大表象赋义提高了对数模型解释力而降低了数字估计的准确性,小表象的影响比较微弱。
Abstract: Numbers can be divided into pure numbers and concretized numbers. Concretized numbers are numbers with measurement units. As for the pure numbers, previous findings indicated that smaller children's number-line estimation results conform to Fechner's law (S=KlgR), which means estimation results increase logarithmically with the increase of the actual number for smaller children, while the estimation increases linearly for older children in the same number range. However, the representation of concretized numbers was rarely discussed in previous studies. As for the generation and propagation of the concept of number, there have been two different views. One is invention-spread hypothesis, the other is module hypothesis. Based on invention-spread hypothesis,concretized numbers are more inclined to be represented linearly in number-line estimation task. In other words, concretized numbers can facilitate the logarithmic-to-linear shift. However, module theory maintains that pure numbers are more suitable to be processed by number module, and easier to be represented linearly than concretized numbers. Hence, compared with pure numbers, concretization might put off the logarithmic-to-linear shift. Three classes of children (47 Second graders,40fourth graders,31sixth graders)attended the experiment. Numbers and number-line estimation task were duplicated those of Siegler and Opfer (2003). Pure number estimation was the same with that of previous studies, while the concretized numbers were numbers that were concretized with concrete meaning. Concretized numbers were divided into two levels, i.e. big image (elephant) concretization and small image (ant) concretization. Specifically, concretizing a number was to paste a small printed picture (elephant or ant) closely behind the number that was 2 cm above the center of the number line. In concretized number-line estimation task, 0 labeled at the left end of each line represented 0 elephant or ant, 1000 on the right end meant 1000 elephants or ants. Based on number line estimation task, we found there exists concretizing effect in number line estimation when numbers are concretized with image. All of the data in three grades showed that within the scale of 0-1000, children’ logarithmic-to-linear representational shift occurred at third grade which was consistent with previous studies, and when the numbers were concretized
符号数量和非符号数量的空间表征:5岁儿童的SNARC效应和距离效应
,熊哲
- , 2016,
Abstract: 摘要: 在儿童的SNARC效应发生时序问题上,本研究假设非符号数量(如,面积)的空间表征早于符号数量(如,阿拉伯数字)的空间表征。为了验证该假设,本研究以5岁幼儿为被试,采用数字比较和面积比较两类任务,以SNARC效应和距离效应为指标进行了研究。实验发现,在数字比较任务中没有SNARC效应,但却存在距离效应;在面积比较任务中出现了SNARC效应和距离效应。据此推断,在阿拉伯数字的空间表征特性出现之前,儿童已经能够对非符号数量信息进行空间表征。
Abstract: The original report of the SNARC effect (Spatial Numerical Association Response Code) (Dehaene, Bossini, & Giraux, 1993 ) showed that in a parity judgment task, small numbers were responded to faster with the left hand while large numbers were responded to faster with the right hand. According to Dehaene et al. (1993), the SNARC effect depends on the quantitative representation of number, such as a left-to-right-oriented analog number line. Berch, Foley, Hill, and Ryan (1999) performed the first study to investigate SNARC effect in children by using a parity judgment task. SNARC effect was observed from 9 years on and it decreased with increasing age. As for the 7 years olds, there was no SNARC effect in number comparison task. Existing findings indicate that SNARC effect can be influenced by children's growing numerical skills and task demands. By using number comparison task and area comparison task that are relevant to magnitude,we set the main goal of current study as to exploring whether the children who could recognize Arabic numbers, but meanwhile have not familiar with numbers because of lacking in enormous amount of mathematical training, could demonstrate characteristics of spatial encoding in representation of numbers or area. We hypothesized that spatial representation could be automatically activated when 5 year-olds representing magnitude of circle area rather than magnitude of Arabic number. In order to decrease the influence of mathematical training, we selected the children in the middle class in kindergarten as subjects for they could discriminate Arabic numbers but not very familiar with them. There were two kinds of task. The first one was number comparison task which was adopted by van Galen & Reitsma(2008)who had found that 7 years olds could activate mental number line. We anticipated there would not SNARC effect in number comparison task for the children were far below 7 years old. The second task was area comparison task which was easier than number comparison task for the children were more familiar with area than numbers in their daily life. And we anticipated that in the second task, SNARC effect would appear. Rts data of number comparison task analysis indicated that there was no SNARC effect,but distance effect was found. The analysis of error rate indicated that there was no SNARC
一种基于PAST盲分离的终极无线电信号检测方法
徐静,艳军,
安徽大学学报(自然科学版) , 2011,
Abstract:
功能柱结构神经网络模型中的同步振荡现象
李速,齐翔,,汪云九
中国科学 生命科学 , 2004,
Abstract: 功能柱作为大脑皮层一个普遍存在的基本结构, 有着重要的功能意义. 基于皮层功能柱的生理特点, 构建一个模块式的神经网络模型. 当施以恒定密度的脉冲刺激时, 单个功能柱能产生同步振荡. 根据外界输入和网络结构参数的不同, 振荡频率在3~43 Hz之间变化. 由多个功能柱构成的网络之间能在各振荡子之间出现复杂的同步现象, 网络中可以出现部分同步的亚集群.
功能柱结构神经网络模型中的同步振荡现象
李速,齐翔,,汪云九
中国科学 生命科学 , 2004,
Abstract: 功能柱作为大脑皮层一个普遍存在的基本结构,有着重要的功能意义.基于皮层功能柱的生理特点,构建一个模块式的神经网络模型.当施以恒定密度的脉冲刺激时,单个功能柱能产生同步振荡.根据外界输入和网络结构参数的不同,振荡频率在3~43Hz之间变化.由多个功能柱构成的网络之间能在各振荡子之间出现复杂的同步现象,网络中可以出现部分同步的亚集群.
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