全文获取类型
收费全文 | 766篇 |
免费 | 160篇 |
国内免费 | 97篇 |
出版年
2024年 | 2篇 |
2023年 | 10篇 |
2022年 | 17篇 |
2021年 | 22篇 |
2020年 | 53篇 |
2019年 | 42篇 |
2018年 | 44篇 |
2017年 | 40篇 |
2016年 | 42篇 |
2015年 | 26篇 |
2014年 | 36篇 |
2013年 | 95篇 |
2012年 | 23篇 |
2011年 | 38篇 |
2010年 | 22篇 |
2009年 | 49篇 |
2008年 | 54篇 |
2007年 | 61篇 |
2006年 | 41篇 |
2005年 | 45篇 |
2004年 | 35篇 |
2003年 | 36篇 |
2002年 | 36篇 |
2001年 | 25篇 |
2000年 | 25篇 |
1999年 | 13篇 |
1998年 | 6篇 |
1997年 | 18篇 |
1996年 | 14篇 |
1995年 | 7篇 |
1994年 | 12篇 |
1993年 | 10篇 |
1992年 | 2篇 |
1991年 | 4篇 |
1990年 | 2篇 |
1989年 | 3篇 |
1988年 | 1篇 |
1985年 | 4篇 |
1980年 | 2篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1976年 | 2篇 |
1975年 | 1篇 |
排序方式: 共有1023条查询结果,搜索用时 15 毫秒
211.
This article provides an overview of recent developments in solving the timing problem (discreteness vs. continuity) in cognitive neuroscience. Both theoretical and empirical studies have been considered, with an emphasis on the framework of operational architectonics (OA) of brain functioning (Fingelkurts and Fingelkurts in Brain Mind 2:291-29, 2001; Neurosci Biobehav Rev 28:827-836, 2005). This framework explores the temporal structure of information flow and interarea interactions within the network of functional neuronal populations by examining topographic sharp transition processes in the scalp EEG, on the millisecond scale. We conclude, based on the OA framework, that brain functioning is best conceptualized in terms of continuity-discreteness unity which is also the characteristic property of cognition. At the end we emphasize where one might productively proceed for the future research. 相似文献
212.
During cognitive processing, the various cortical areas, with specialized functions, supply for different tasks. In most cases
then, the information flows are processed in a parallel way by brain networks which work together integrating the single performances
for a common goal. Such a step is generally performed at higher processing levels in the associative areas. The frequency
range at which neuronal pools oscillate is generally wider than the one which is detectable by bold changes in fMRI studies.
A high time resolution technique like magnetoencephalography or electroencephalography is therefore required as well as new
data processing algorithms for detecting different coherent brain areas cooperating for one cognitive task. Our experiments
show that no algorithm for the inverse problem solution is immune from bias. We propose therefore, as a possible solution,
our software LOCANTO (LOcalization and Coherence ANalysis TOol). This new package features a set of tools for the detection
of coherent areas. For such a task, as a default, it employs the algorithm with best performances for the neural landscape
to be detected. If the neural landscape under attention involves more than two interacting areas the SLoreta algorithm is
used. Our study shows in fact that SLoreta performance is not biased when the correlation among multiple sources is high.
On the other hand, the Beamforming algorithm is more precise than SLoreta at localizing single or double sources but it gets
a relevant localization bias when the sources are more than three and are highly correlated. 相似文献
213.
This paper introduces the Eight Dimensional Methodology for Innovative Thinking (the Eight Dimensional Methodology), for innovative
problem solving, as a unified approach to case analysis that builds on comprehensive problem solving knowledge from industry,
business, marketing, math, science, engineering, technology, arts, and daily life. It is designed to stimulate innovation
by quickly generating unique “out of the box” unexpected and high quality solutions. It gives new insights and thinking strategies
to solve everyday problems faced in the workplace, by helping decision makers to see otherwise obscure alternatives and solutions.
Daniel Raviv, the engineer who developed the Eight Dimensional Methodology, and paper co-author, technology ethicist Rosalyn
Berne, suggest that this tool can be especially useful in identifying solutions and alternatives for particular problems of
engineering, and for the ethical challenges which arise with them. First, the Eight Dimensional Methodology helps to elucidate
how what may appear to be a basic engineering problem also has ethical dimensions. In addition, it offers to the engineer
a methodology for penetrating and seeing new dimensions of those problems.
To demonstrate the effectiveness of the Eight Dimensional Methodology as an analytical tool for thinking about ethical challenges
to engineering, the paper presents the case of the construction of the Large Binocular Telescope (LBT) on Mount Graham in
Arizona. Analysis of the case offers to decision makers the use of the Eight Dimensional Methodology in considering alternative
solutions for how they can proceed in their goals of exploring space. It then follows that same process through the second
stage of exploring the ethics of each of those different solutions.
The LBT project pools resources from an international partnership of universities and research institutes for the construction
and maintenance of a highly sophisticated, powerful new telescope. It will soon mark the erection of the world’s largest and
most powerful optical telescope, designed to see fine detail otherwise visible only from space. It also represents a controversial
engineering project that is being undertaken on land considered to be sacred by the local, native Apache people. As presented,
the case features the University of Virginia, and its challenges in consideration of whether and how to join the LBT project
consortium.
Earlier versions of this paper were presented at the “Ethics and Social Responsibility in Engineering and Technology” meeting,
New Orlenas, 2003 and at the American Society of Engineering Education (ASEE) annual Meeting, 2003. 相似文献
214.
Sources of individual differences in fraction skills 总被引:1,自引:0,他引:1
The purpose of this investigation was to evaluate a conceptual model of relations between two kinds of mathematical knowledge (simple arithmetic and conceptual knowledge), two kinds of child characteristics (working memory and on-task related classroom behavior), and individual differences in three kinds of fraction outcomes (fraction computation, estimation, and word problems) in 105 fifth grade students. Structural equation modeling provided consistent evidence that conceptual knowledge independently contributes to individual differences in the three fraction outcomes. Simple arithmetic knowledge was uniquely related only to variability in fraction computation skills. Mathematical knowledge was found to mediate some of the contributions of both working memory and classroom behavior on variability in fraction outcomes. These supported mediating processes extend the current literature by explication of the pathways via which characteristics of children may affect individual differences in fraction outcomes. 相似文献
215.
Chance P 《Journal of the experimental analysis of behavior》1999,72(3):433-440
The year of Thorndike's dissertation on animal intelligence, 1898, may mark the beginning of the field that eventually became known as the experimental analysis of behavior. The dissertation began a major shift in thinking about animal and human learning, provided important methodological innovations, and carried the seeds of later research and theory, particularly by B. F. Skinner. Although Thorndike was an associationist in 1898, the dissertation began the systematic search for fundamental behavioral processes, and laid the foundation for an empirical science of behavior. 相似文献
216.
Harding JW Wacker DP Berg WK Cooper LJ Asmus J Mlela K Muller J 《Journal of applied behavior analysis》1999,32(1):63-82
We examined how positive and negative reinforcement influenced time allocation, occurrence of problem behavior, and completion of parent instructions during a concurrent choice assessment with 2 preschool-aged children who displayed severe problem behavior in their homes. The children were given a series of concurrent choice options that varied availability of parent attention, access to preferred toys, and presentation of parent instructions. The results showed that both children consistently allocated their time to choice areas that included parent attention when no instructions were presented. When parent attention choice areas included the presentation of instructions, the children displayed differential patterns of behavior that appeared to be influenced by the presence or absence of preferred toys. The results extended previous applications of reinforcer assessment procedures by analyzing the relative influence of both positive and negative reinforcement within a concurrent-operants paradigm. 相似文献
217.
218.
219.
220.
The purpose of this study was to examine the relations between various aspects of social support and maternal and infant outcome variables in a group of families having infants showing food refusal compared to a control group. In the case of early food refusal, the results indicated that access to emotional support and satisfaction with support were related to maternal psychosomatic health. The relationships were interpreted as showing that social support has moderating effects on negative outcomes of food refusal. 相似文献