共查询到20条相似文献，搜索用时 250 毫秒
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ＡＭＯＤＩＦＩＥＤＣＲＡＮＫ－ＮＩＣＯＬＳＯＮＳＣＨＥＭＥＦＯＲＴＨＥＩＮＩＴＩＡＬ－ＢＯＵＮＤＡＲＹＶＡＬＵＥＰＲＯＢＬＥＭＯＦＳＵＰＥＲＴＨＥＲＭＡＬＥＬＥＣＴＲＯＮＴＲＡＮＳＰＯＲＴＥＱＵＡＴＩＯＮＳｕｎＺｈｉｚｈｏｎｇ（孙志忠）（Ｄｅｐａｒｔ... 相似文献
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ＩＭＰＬＥＭＥＮＴＡＴＩＯＮＯＦＤＩＳＣＯＮＴＩＮＵＯＵＳＣＯＥＦＦＩＣＩＥＮＴＩＮＶＥＲＳＩＯＮＦＯＲＡＣＬＡＳＳＯＦＨＹＰＥＲＢＯＬＩＣＥＱＵＡＴＩＯＮＬｉｕＪｉｊｕｎ（刘继军）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓａｎｄＭｅｃｈａｎｉ... 相似文献
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ＴＨＥＢＥＨＡＶＩＯＲＯＦＡＣＬＡＳＳＯＦＥＰＩＤＥＭＩＯＬＯＧＩＣＡＬＭＯＤＥＬＷＩＴＨＰＯＰＵＬＡＴＩＯＮＤＹＮＡＭＩＣＳＡＮＤＮＯＮＬＩＮＥＡＲＩＮＦＥＣＴＩＯＵＳＲＡＴＥＤｏｎｇＭｅｉｆａｎｇ（董梅芳）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａ... 相似文献
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ＩＮＦＬＵＥＮＣＥＭＥＡＳＵＲＥＯＦＰＥＲＴＵＲＢＡＴＩＯＮＡＮＤＶＡＲＩＡＢＬＥＳＩＮＲＥＧＲＥＳＳＩＯＮＭＯＤＥＬＳＨｕＹｕｅｑｉｒｉｇ（胡跃清）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓａｎｄＭｅｃｈａｎｉｃｓ）ＩＮＦＬＵＥＮＣＥＭＥＡＳ... 相似文献
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ＡＲＥＬＡＴＩＯＮＡＭＯＮＧＡＳＳＯＣＩＡＴＩＶＥＡＬＧＥＢＲＡＳ，ＢＩＡＬＧＥＢＲＡＳＡＮＤＳＥＭＩＧＲＯＵＰＡＬＧＥＢＲＡＳＬｉＦａｎｇ（李方）（ＤｅｐａｒｔｎｉｅｎｔｏｆＭａｔｈｅｎｉａｔｉｃｓａｎｄＭｅｃｈａｎｉｃｓ）ＡＲＥＬＡＴＩＯＮＡＭＯ... 相似文献
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“ＳＰＥＣＩＦＩＣＡＴＩＯＮＰＬＵＳＴＲＡＮＳＦＯＲＭＡＴＩＯＮＴＯＰＲＯＧＲＡＭ”：ＡＮＥＷＭＯＤＥＬＯＦＳＯＦＴＷＡＲＥＤＥＶＥＬＯＰＭＥＮＴＳｈｅｎＪｕｎ（沈军）ＣｈｅｎｇＺｈｅｎｇｃｈａｏ（程正潮）（ＤｅｐａｒｔｍｅｎｔｏｆＣｏｍｐｕｔｅｒＳ... 相似文献
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Mary L. Borkhuis 《Learning & behavior》1973,1(1):29-32
Nine highly trained rhesus monkeys were given short-term memory tests in a pattern reproduction paradigm. One white light and a variable number of red lights (1 to 15) in a 4 by 4 matrix were shown to Ss for 0.2 sec. After a 5-sec delay, Ss obtained a reward by opening the cell which previously had been illuminated with a white light. Choice of a cell which had not been illuminated or one which had been lit with a red light was not rewarded, and the response was recorded as an error. As the number of red lights increased from 2 to 6, the responses to the relevant light decreased and then, for 7 to 15 red lights, remained constant 相似文献
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Ben A. Williams 《Learning & behavior》1984,12(2):117-121
Pigeons were trained on a conditional discrimination involving form and color elements in an autoshaping procedure. When the colors were also illuminated during 50% of the ITIs (Experiment 1), or were presented alone on additional extinction trials (Experiment 2), the discrimination was not acquired, indicating a loss of salience for stimuli not temporally predictive of reinforcement. But when the colors and the forms were both similarly illuminated, the discrimination was acquired, indicating that relative stimulus validity, not the absolute temporal predictiveness per se, was the controlling variable. 相似文献
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基于T矩阵方法,计算了位移和面力均连续的理想界面条件下单个散射体的物质参数,推导了T矩阵元素的具体表达式和散射截面公式.针对Ge-Al复合材料,用Matlab进行了编程和数值计算,并与波函数法的计算结果进行了比较,指出了T矩阵方法存在的问题,提出了改进措施. 相似文献
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非视距环境下基于散射体信息的被动定位(英文) 总被引：1，自引：0，他引：1
为了提高传统的TOA/AOA定位技术在非视距环境下的定位精度,提出了一种基于散射体信息的混合定位方法.首先,利用基站坐标信息和TOA测量值确定线性化的可行区域,产生移动台的候选位置点.对每一个移动台候选点,结合TOA和AOA测量值,计算各自散射体半径,通过与先验的散射体信息的比较,筛选候选移动台位置点.然后,运用自适应模糊聚类算法估计移动台位置,完成定位.最后,对所提出的定位算法进行了仿真验证.仿真结果表明:所提出的基于散射体信息的混合TOA/AOA定位算法能够减轻非视距效应,有效估计移动台位置. 相似文献
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Daniel H. Ashmead Michael E. McCarty Linda S. Lucas Mariana C. Belvedere 《Child development》1993,64(4):1111-1127
This experiment evaluated the role of visual input about the location of a target object and the location of the hand in reaching by infants and adults. 5- and 9-month-old infants were presented with illuminated toys to reach for in a dark room. On no-switch trials, the toy remained illuminated throughout the infant's reach, whereas on switch trials the first-lit toy was replaced during the reach by a second-lit toy at a different position. On approximately half of the trials of each type a luminescent marker was attached to the reaching hand. Adult subjects (tested without the hand marker) fully compensated to the second-lit toy on switch trials, during a second reaching segment. On switch trials, 9-month-olds partially adjusted to the second-lit toy when wearing the hand marker and did not adjust without it. On no-switch trials, 9-month-olds reached just as accurately with or without the hand marker. 5-month-olds were generally inaccurate in their reaching and were unaffected by the presence or absence of the hand marker. The findings suggest that during the development of reaching there is an increase in visual guidance during the approach phase of reaches. 相似文献
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刘炬航 《湖北广播电视大学学报》2007,27(8):98-99
通过美国历史上两个著名案例的分析,说明法律实践离不开哲学洞察力。这种哲学洞察力,使法律不仅仅局限于维系社会秩序,而是主导一种新的社会生活方式。 相似文献
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通过澄清斯东所谓表示言论自由的希腊术语isegoria和parrhesia之确切意涵及其在雅典民主制度中的实际功用,进而阐明言论自由与民主之间的逻辑关联,论证民主雅典并不存在现代意义上的言论自由。故而,不管苏格拉底是否自己故意找死,他都无法在其审判中援引言论自由作为一项基本权利为自己辩护,由此对斯东的论证提出某种质疑。 相似文献
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In each of two experiments, different groups of pigeons were required to discriminate between one of two basic kinds of stimulus differences: stimulus quality or stimulus location. For stimulus-quality groups, a key was illuminated by one of two colors on trials ending with food delivery and by the other color on trials ending with no food. For stimulus-location groups, a key was illuminated at one of two locations on trials ending with food delivery and at the other location on trials ending with no food. The birds began to respond differentially to the stimuli (i.e., peck the keys on food trials and not peck the keys on no-food trials) earlier in acquisiton if the stimulus qualities served as the signals for trial outcomes than if the stimulus locations served as those signals. The results from both experiments are consistent with predictions from a hypothesis regarding interactions among the qualities and locations of stimuli and responses (the “quality-location hypothesis”). Furthermore, the present results support other recent demonstrations of the important role that spatial relations among stimuli can play in classical conditioning. 相似文献
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通过单一改变组分材料铝或者铅的密度,以及单一改变晶格常数的取值来调节一维铝/铅匀直杆状声子晶体的带隙分布情况。结果表明：该声子晶体中,当单一增大每种材料的密度时,散射体与基体材料的密度差值增大,其入射波散射就更为强烈,也就越容易产生低频带隙;当单一增大声子晶体的晶格常数,即增加复合结构的长度时,入射波散射得就越多,透射波就越来越少,该声子晶体带隙便呈现出向低频率区域靠近的特性。 相似文献
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Newly hatched chicks were force-fed food and water throughout rearing, and food, water, or sand reinforcers during exposure to an omission-training procedure. The chicks were thus prevented from performing approach and contact responses to the reinforcer at any time in their lives. Nevertheless, the subjects displayed approach and species-specific feeding or drinking reactions directed toward an illuminated key paired with food or water, but not with sand. Illumination of a key either uncorrelated or negatively correlated with food or water did not engender appreciable responding. Feeding and drinking reactions were topographically distinct, determined by the type of reinforcer, but were not elicited by the reinforcer. These findings support a “learned release” view of autoshaping, according to which phylogenetically preorganized behavior patterns are triggered by distal stimuli paired with biologically significant proximal stimulation, and suggest a close relationship between autoshaping and primitive instances of visual object recognition. 相似文献