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Search Results: 1 - 10 of 346352 matches for " 张晓龙 "
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演绎与归纳推理比较的神经机制:问题与趋势
The Neural Mechanisms of Comparison between Deductive and Inductive Reasoning: Problems and Trends
 [PDF]

, 明明, 长权
Advances in Psychology (AP) , 2016, DOI: 10.12677/AP.2016.64049
Abstract:
演绎推理和归纳推理是两种主要形式的推理,单加工理论和双加工理论是推理心理学领域主要存在的两种相互竞争的理论。目前,已有多项研究采用认知神经科学技术来比较演绎推理和归纳推理,以检验推理是单加工过程还是双加工过程。但这些研究还面临诸多问题:正向推断逻辑的局限;不同的认知神经科学技术的差异;复杂多变的实验任务;以及认知神经科学本身所面临的质疑。未来的研究依然可以以正向推断为基本逻辑和突破口,采用多元的技术手段和规范的实验任务,对演绎和归纳推理比较的心理机制进行分子水平、神经元水平等更加微观化的研究。
Deductive reasoning and inductive reasoning are two main forms of reasoning. Single-process ac-counts and dual-process accounts are two competing theories of reasoning psychology. At present, many studies compare deductive and inductive reasoning using cognitive neuroscience technology to test whether reasoning is a single or double process. But there are many problems in the studies: limitations of forward inference, differences in cognitive neuroscience techniques, complex and varied experimental tasks, challenges of cognitive neuroscience itself and so on. In future research, forward inference can still be the basic logic and breakthrough of studies; multivariate techniques and standard experimental tasks should be conducted; and studies on the neural mechanisms of comparison between deductive and inductive reasoning should go deep into more microscopic level, such as the level of molecule and neuron.
残渣油热转化反应动力学研究
,
华东理工大学学报 , 1998,
Abstract: 用恒温盐浴法测定了辽河和管输减压渣油热裂解反应的转化性能,用简单的热裂解反应动力学模型对实验结果进行了关联,并求取了该模型的动力学参数。结果表明,热裂解动力学模型计算结果与实验结果能很好吻合。
融合语素特征的中文褒贬词典构建
,
计算机应用 , 2012,
Abstract: ?针对传统语素方法对于种子词语数量的依赖和传统图方法召回率较低的问题,提出一种将词语间语素关系融入到图模型中,并结合词语同义关系进行中文褒贬词典半监督构建的方法。首先利用语素模型计算词语间语素相似度;然后利用同义词林和双语词典资源,构建词语间同义关系;最后将二种关系结合,并利用标签传播(lp)算法进行词语的褒贬分类。实验结果表明,所提方法具有较高的准确率和召回率,微平均f1值最高可达92.8%;并降低了对种子词语数量的依赖,当种子词语数量仅为100时,微平均f1值依然可达到84.1%。除此之外,所提方法还具有快速收敛的特性。
基于if-then规则的决策树裁剪算法
,骆名剑
计算机应用 , 2005,
Abstract: ?决策树是机器学习和数据挖掘领域中一种基本的学习方法。文中分析了c4.5算法以及该算法不足之处,提出了一种决策树裁剪算法,其中以规则信息量作为判断标准。实验结果表明这种方法可以提高最终模型的预测精度,并能够很好克服数据中的噪音。
A股市场错误定价的度量及影响因素研究*
THE MEASUREMENT AND THE INFLUENCES OF ASHARE STOCK MARKETS MISPRICING

关伟,
- , 2017,
Abstract: 摘要 本文对基于迎合理论的可操作应计利润模型在A股市场错误定价的度量效果进行实证研究分析,结果发现可操作应计利润模型在A股市场错误定价度量方面的适用性较高。在错误定价的影响因素方面,本文通过构建SVAR模型对该问题进行研究。发现货币供给量、融资结构能够对错误定价水平造成显著的长期(1年以上)反向冲击作用,且对错误定价水平的变化具备较高的解释能力。
Abstract: This paper testifies the efficiency of DACCR model which is based on catering theory. We find that the DACCR model is eminently effective in Ashare stocks mispricings measurement. In order to find which variable influence Ashares mispricing level, this paper builds SVAR model to search which economic variable influence DACCR greater and which variable could explain DACCRs changes more. The model results show M2 and financing structure make greatest influence on DACCR in a long term (more than one year), which also explain the DAACR changes mostly.
按非Fourier定律分析陶瓷薄膜受热沉积作用的热力耦合问题
,陈立群,
重庆大学学报 , 2013, DOI: 10.11835/j.issn.1000-582X.2013.05.019
Abstract: 考虑热传导的非Fourier定律,并且在温度控制方程中计入应变和应力变化的热效应,在应力本构方程中计入了温度变化的影响,得出了各向同性线性热弹性温度梯度非Fourier物质的热力双向耦合方程,且对有限厚度陶瓷薄膜,给出了边界受单一脉冲热沉积的典型一维瞬态问题的数值结果。讨论了延迟时间对温度增加量和应力分布的影响。主要结论:对陶瓷类介质,由于热波波速和膨胀波波速有极大的数量级差异,热力耦合对传播速度影响甚微,即以十分接近热波波速和膨胀波波速传播。由于外加作用是以热学量给出的脉冲热沉积,因此传播的主要控制速度是热波波速。传播的力学量属高阶小量。
STUDIED THE METABOLISM OF ORGANISM BY LASER-EXCITED NADH FLUORESCENCE
激光感生NADH荧光研究生物体的新陈代谢

,杨远
生物物理学报 , 1990,
Abstract: We have used the laser fluorimetry to perform the studies of the NADH molecule associated with the metabolism. We have measured the dependence of the intensity of the NADH fluorescence spectra on the solution concentration , pH value and temperature . We have also measured the metabolism of open-chest rat heart and the cultured myocardial cells with drug .
Toward Effective Knowledge Acquisition with First-Order Logic Induction
Masyuki Numao,

计算机科学技术学报 , 2002,
Abstract: Knowledge acquisition with machine learning techniques is a fundamental requirement for knowledge discovery from databases and data mining systems.Two techniques in particular-inductive learning and theory revision-have been used toward this end.A method that combines both approaches to effectively acquire theories (regularity) from a set of training examples is presented.Inductive learning is used to acquire new regularity from the training examples;and theory revision is used to improve an initial theory.In addition,a theory preference criterion that is a combination of the MDL-based heuristic and the Laplace estimate has been successfully employed in the selection of the promising theory.The resulting algorithm developed by integrating inductive learning and theory revision and using the criterion has the ability to deal with complex problems,obtaining useful theories in terms of its predictive accuracy.
不同空隙结构沥青混合料生态效能的研究
,,
公路交通科技 , 2015,
Abstract: 多孔沥青混合料具有改善生态、热环境、光环境、防洪、吸声降噪和提高行车安全等优势,但不同空隙结构沥青混合料对径流污染控制和温度的调节功能还不明确.因此,重点研究不同空隙结构沥青混合料的热物参数,并通过室内模拟太阳辐射试验系统,研究不同空隙结构沥青路面内部温度变化规律,得出增大沥青混合料的空隙率,能够降低其导热系数,从而降低沥青路面内部的温度;同时在明确径流污染主要评价指标的基础上,研究了不同空隙结构沥青混合料控制径流污染的效果,进而明确了不同空隙结构沥青混合料的热阻和控制径流污染效能.最后,从透水、承载、耐久和生态效能综合考虑,建议多孔沥青混合料的有效空隙率应为15%~20%,为今后设计出生态环保型透水路面提供依据.
毫米波天线近场测量中截断误差的定量分析
任 立,, 琮
遥感技术与研究 , 2007,
Abstract: 系统分析了毫米波天线测量系统中的各种误差的分布及对测量结果可能产生的影响,并选择了截断误差进行详细分析研究。首先讨论了扫描平面位置的选择对测量结果的影响以及同其相关因素之间的制约关系;然后对截断误差进行了定量分析,得到了截断边界处电场水平与截断引起测量误差水平之间的定量关系,讨论了截断误差对主、旁瓣误差的影响;对微波及更高频率的天线测量工作过程中截断误差的特点、估计与控制进行了总结;最后进行计算机仿真与模拟。
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