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71.
薛浩 《盐城工学院学报(社会科学版)》1999,(2)
在经典力学中的中心力场中,除了能量E和角动量L两个运动积分外,还存在着第三个运动积分,即Runge-Lenz矢量,该矢量可算符化。以各向同性谐振子为例,运用Runge-Lenz矢量简洁地求解出量子力学中另一类典型问题——谐振子的能级公式,与求解薛定谔方程的结果一致,从中可看出用Runge-Lenz矢量处理问题的简洁性。 相似文献
72.
If we express our knowledge in sentences, we will find that these sentences are linked in complex patterns governed by our observations and our inferences from these observations. These inferences are to a large extent driven by logical rules. We ask whether the structure logic imposes on our knowledge restricts what we forget and what we remember. The model is a two period S5 logic. In this logic, we propose a memory loss operator: the agent forgets a sentence pif and only if he knows pat time 1 and he does not know pat time 2. Equipped with the operator, we prove theorems on the relation between knowledge and memory loss. The main results point to classes of formulas that an agent cannot forget, and classes of formulas he must forget. A desirable feature is that most results hold in the S4 logic. The results illustrate bounds to memory loss, and thus to bounded rationality. We apply the model to single-agent conventions: conventions made between an agent and himself. 相似文献
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75.
Maher Kachour 《统计学通讯:理论与方法》2014,43(2):355-376
In recent years, there has been a growing interest in modelling integred-valued time series. In this article, we propose a modified and generalized version of the first order rounded integer-valued autoregressive RINAR(1) model, originally introduced by Kachour and Yao (2009). Indeed, this class can be considered as an alternative of classical models based on the thinning operators. Using a Markov chain method, conditions for stationarity and the existence of moments are investigated. Least squares estimator of the model parameters is considered and its consistence is established. Finally, we describe the price change data using a model of the new class. 相似文献
76.
Measuring supplier performance possesses the properties of multi-dimension and multi-scale, it increases the complexity of the aggregation and assessment process. A focal company must develop an effective procedure for overcoming the complexity of performance measurement. Furthermore, the assessment of supplier performance must conform to the product-developed strategy of the focal company. This study is a further research deeper into the concept already introduced in Chang et al. [1] [Applying fuzzy linguistic quantifier to select supply chain partners at different phases of product life cycle. International Journal of Production Economics 2006; 100(2):348–59]; using multi-granularity linguistic variable and numerical ration scale to represent the overall supply performance. By unifying the derived information, the measurement complexity could be resolved. The fuzzy preference was constructed to adjust the consistent direction and transform information into fuzzy relationship. Finally, fuzzy linguistic quantifier guided ordered weighted aggregation (FLQG-OWA) operator with maximal entropy was computed and aggregated with all indicators to meet the current policy of the focal company. 相似文献
77.
顾鸣镝 《西南交通大学学报(社会科学版)》2012,(2):65-70
汉语中"很+NP"结构是一个典型的高程度性状义构式。构式的部分能产性基于范畴属性的归纳,其认知机制是非范畴化的。某个具体名词一旦进入"很+NP"构式,这个名词的意义就会遵循它所嵌入的构式的意义,条件是该名词具有可被激活的表示程度性状义的语义因子。构式指示语义类型、构式强制提供了词汇项产生语义类型转变的条件,以保证相应的语义因子获得合适的论元。进入"很+NP"构式的名词都含有该构式所在的具体语境的语义因子,整个过程是以认知语言学的凸显原则为基础的。 相似文献
78.
汪文珑 《绍兴文理学院学报》2010,30(9)
研究一类标签细胞系统的解,使用泛函分析方法,特别是Banach 上的线性算子理论和半群理论,证明了该系统解的适定性、线性稳定性和指数稳定性. 相似文献
79.
基于企业人力资源管理(HRM)系统中职能管理部门年度绩效考核决策评价和选优序列生成过程中的数据的不确定性、随机性和模糊性,通过设计季度绩效多维度模糊评价体系,采用非均匀加性语言评估标度定性的多维度评价,构建动态加性语言判断矩阵模型,利用DLWA算子等语言信息集成算子,集成多个决策者不同时期绩效指标评价数据,并整合不同决策者的偏好度,综合呈现年度部门业绩选优序列,优化提升职能管理部门绩效考核决策的精确性、公平性和可信度。 相似文献
80.
《统计学通讯:理论与方法》2012,41(16-17):3162-3178
In this article we use a new methodology, based on algebraic strata, to generate the class of all the orthogonal arrays of given size and strength. From this class we extract all the non isomorphic orthogonal arrays. Then, using all these non isomorphic orthogonal arrays, we suggest a method based on the inequivalent matrices permutations testing procedures Basso et al. (2004) in order to obtain separate permutation tests for the effects in unreplicated mixed level fractional factorial designs. In order to validate the proposed method we perform a Monte Carlo simulation study and find out that the permutation tests appear to be a valid solution for testing effects, in particular when the usual normality assumptions cannot be justified. 相似文献