共查询到20条相似文献，搜索用时 109 毫秒
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Rats received three-trial series on a T-maze consisting of extended visually distinct left-black and right-striped side runways.
During the first phase of training, when allowed to select baited runways within these series, they predominantly alternated
their choices. During the second phase, rats received forced-choice serial pattern training of series consisting of two rewarded
(R) trials and one nonrewarded (N) trial in two fixed orders, RRN and RNR. In Experiment 1, the rats in the runway shift rule
group always received the second R trial when forced down a runway opposite that on the preceding trial in the series and
the N trial when forced down the same runway. The rats in the runway stay rule group always received the second R trial when
forced down the same runway and the N trial when forced down the opposite runway. In Experiment 2, each rat was conditionally
trained with both runway outcome rules as determined by the central alley lighting and the type of food in the side alleys.
The rats took longer to reduce their running speed on the N trial within each sequence under the runway stay rule than under
the runway shift rule. They also took longer to acquire serial pattern responding for the RNR than for the RRN series only
under the runway stay rule condition. When subsequently reexposed to series of free-choice trials on the final phase, rats
maintained spontaneous alternating choice patterns under the runway shift rule conditions but either seldom alternated their
choices (Experiment 1) or greatly reduced choice alternations (Experiment 2) under the runway stay rule condition. We discussed
these effects in terms of rats’ natural foraging strategies and as a factor that interacts with other within- and between-series
variables that affect serial pattern behavior. 相似文献
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在考前这一阶段，明智的教师一般都不会给学生布置太多的作业，而是留给学生充分的时间进行调整和梳理。要有计划，有针对性，不能胡子眉毛一把抓，正如英语中有一句话“Grasp all，lose all”。下列几个环节必须作为重点来抓： 相似文献
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只身一人到异国求学,文化的差异,寂寞和无所依靠的感觉,使她变得放任颓废。好在母爱的伟大超越国界,这个外表严厉的异国妈妈,给了她言传身教的爱的教育。在成长的经历中,这是一笔不小的财富。 相似文献
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Patrick Lannin 《海外英语》2005,(11)
Two Australians won the Nobel prize for medicine on October 3, 2005 for showing that a bacterium rather than stress causes stomach inflammation and ulcers, after one of them drank a witches' brew of bacteria to prove the point. Experts said the discovery of the Helicobacter pylori bacterium by Barry Marshall and Robin Warren in 1982 was met with skepticism by the medical community,which did not think bacteria could survive in the acid conditions of the stomach. Marshall resorted to drinking a culture of the bacteria to give himself an ulcer and then to treat himself. 相似文献
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Luce C. A. Claessens Jan van Tartwijk Anna C. van der Want Helena J. M. Pennings Nico Verloop Perry J. den Brok 《The Journal of educational research》2017,110(5):478-493
The authors voice teachers' perceptions of their interpersonal experiences with students in both positive and problematic relationships. Interview data from 28 teachers were examined by coding utterances on teacher and student interactions. Results indicate that teachers defined the quality of the relationship mostly by the level of communion (friendly vs. hostile), instead of by the level of agency (in control vs. powerless). Analyses of mentioned teacher and student behavior show a friendly interactional pattern for positive relationships and a hostile pattern for problematic ones. In teachers' perceptions, positive and problematic relationships also differed in context where encounters take place and topic of talk. Contrary to interactions in problematic relationships, encounters in positive relationships were mostly situated outside the classroom context and conversations during these encounters covered a wide range of topics. Implications for teacher education programs are discussed. 相似文献
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李尊 《漯河职业技术学院学报》2012,11(5):33-34
无线网络已经融入了现代人生活、工作中,成为必不可少的网络工具。网络是信息化的基础,网络设施的完善和网络技术的进步,对信息网络化起到积极的推动作用。随着Internet应用的迅猛发展,以及笔记本电脑、个人数据助理（PDA）等移动智能终端的日益增长,人们对无线局域网（WLAN）的需求也急剧增加。以无线局域网的现状、特点为研究对象,探讨win7系统下如何设置无线网络连接及局域网连接、WLAN安全,使无线网络在学习、生活中得到更广泛的应用。 相似文献
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苏文 《语数外学习(初中版)》2007,(9Z):58-58
People often say, ＂Time is money. ＂But I think time is even more important than money. Maybe someone will ask me why. The reason is when money is spent out, we can earn it back. However, when time is spent away, it＇ II never return. One＇s life is limited, so we mustn＇t waste（浪费）time.[第一段] 相似文献
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When can one call a sequence of heads and tails truly random? This article is about the Kolmogorov or algorithmic complexity of a sequence. This complexity tells you how random a sequence is. 相似文献
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目前中小学学校电脑实验室用的一般都是 NOVELL Netware V3.12网络，采用的是无盘工作站。它的优点是：①可以预防病毒；②启动速度快；③节省经费开支。档次较高的微机室一般都装有两种操作系统，即 DOS6. 22操作系统和 win95操作系统的双启动系统。 DOS系统一般不需维护。因为该网络限制了普通用户对 DOS操作系统及里面的应用软件的使用权限，普通用户不能删除和改写里面的系统文件和应用文件。而 win95则不然，用户在使用 win95时对里面的部分文件具有 [RWCEMFA]七种权限。学生在使用时由于各种原因不小心将某些重要文件删除、… 相似文献
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Today there is a kind of strong and dangerous disease called SARS. It is different from the common pneumonia. Many people have got it and some of them have died. Now more and more people are worried about it.How to prevent the disease?First we must have good and healthy living habits. Everyone should keep 相似文献
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在斯诺克英国锦标赛上,年仅18岁的中国台球运动员丁俊晖以10比6的比分战胜连续六次夺冠的英国老将戴维斯取得冠军。 相似文献
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邵志武 《第二课堂(小学)》2004,(9)
在Windows中,Shift键有很多作用,尤其是当它和其他功能键组合时。比如大家会经常使用Ctrl+Shift来切换输入法;用Shift+Space在中文输入状态的半角与全角之间快速切换;在开机进入Windows时按住Shin键禁止系统的自启动项目运行;在光驱中放入光盘时按住Shift键可以防止光盘自动播放……实 相似文献
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《华夏少年(简快作文 )》2014,(3)
ghost win7系统的安装分五步走,其中第一步是装前检查;第二步设置COMS相关参数;第三步系统安装;第四步系统瘦身;第五步系统完善,每步都很重要。 相似文献
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LI Ji-liang FANG Xiang-zhong HOU Jun 《浙江大学学报(A卷英文版)》2007,8(4):620-624
In this paper, we propose a sparse overcomplete image approximation method based on the ideas of overcomplete log-Gabor wavelet, mean shift and energy concentration. The proposed approximation method selects the necessary wavelet coefficients with a mean shift based algorithm, and concentrates energy on the selected coefficients. It can sparsely approximate the original image, and converges faster than the existing local competition based method. Then, we propose a new compression scheme based on the above approximation method. The scheme has compression performance similar to JPEG 2000. The images decoded with the proposed compression scheme appear more pleasant to the human eyes than those with JPEG 2000. 相似文献