共查询到20条相似文献，搜索用时 390 毫秒
1.
史琨 《通化师范学院学报》2013,34(8):51-53
粗糙集理论是一种处理不精确、不确定和模糊知识的软计算工具,被广泛应用于知识发现领域.在实际问题中,信息不完备成为解决问题的障碍之一.该文通过基于知识距离提出的约简算法,针对不完备信息系统,提出了一种决策规则的提取方法,实例证明该方法求得的决策规则,较好的解决了数据不精确和缺省的问题. 相似文献
2.
唐丽 《绵阳师范学院学报》2009,28(2)
决策系统中最为核心的问题是关于决策规则的获取问题.在有关学者的研究基础上,讨论了 Vague决策表中有关性质;此基础上提出一种新的决策规则--Vague决策规则,并将决策表应用于心电图分类识别,准确地对具体病例进行判断,取得了比较好的效果. 相似文献
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决策支持是数据挖掘[1-3]的主要目的之一,研究决策支持方法具有实用价值.基于分组的决策规则信息库表的决策支持方法,是在基于决策规则信息库表的决策支持方法的基础上提出来的.该方法不仅能够充分挖掘决策表的决策支持能力,提供强有力的决策支持,弥补多数决策规则对于决策表的部分决策支持能力的损失问题,还可以进一步提高获得决策规则信息的响应时间. 相似文献
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不一致决策表的处理一直是比较困难的问题.鉴于不一致规则的不确定性,基于包含度这一描述不确定性关系的有效度量方法,综合不一致规则信息与整个决策表信息,对不一致规则进行修正,进而获取较理想的决策规则,并通过实例进行验证. 相似文献
6.
《教育实用测度》2013,26(4):277-288
The logic of using a sequential decision-making approach using college grade point average (GPA) and test scores for teacher licensure decisions within the conjunctive decision-making model is discussed and contrasted with the compensatory model for decision making. The major issues to consider in choosing between the conjunctive and compensatory models are (a) whether there is a linear (or at least monotonically increasing) relationship between each predictor variable and the criterion variable and (b) whether an excess of one predictor variable can compensate for a deficiency in another variable. If linearity (monotonicity) and compensation are reasonable assumptions, the compensatory model is generally preferred. However, for nonlinear and noncompensatory situations, such as teacher licensure where the purpose is to set a cutoff score to represent minimal competence, not to predict the degree of success, the conjunctive model is more appropriate. Some have suggested using college GPA and licensure tests in a compensatory model for licensure decisions. However, given the lack of content validity of the GPA for the purpose of licensure, and given the lack of comparability of GPAs across institutions (and indeed within institutions), a compensatory model using test scores and college GPA seems inappropriate. 相似文献
7.
Mean decision power （MDP） is an important criterion of a new reduction model, and relative decision power （RDP） and amount of rules （AR） are key parameters of MDP. This paper presents two important properties： relationship between RDP and AR, and relationship between MDP rule set of parent decision table and MDP rule set of child decision table. These properties can help better understanding of the new reduction model and are useful tools by which one can rapidly derive an MDP rule set. 相似文献
8.
吴鸣 《武汉工程职业技术学院学报》2014,(4):71-74
运用基于数据挖掘的决策树分类算法,分析加热炉的大量生产数据,从中获取有价值的规则,形成规则知识库。最后从规则知识库中获取加热炉最优炉温设定值的方法。该方法可实现加热炉最优炉温设定值曲线的寻优及设定,可对应于不同的钢坯种类,提供控制系统优化控制指导,改善钢坯在加热炉内的燃烧过程,提高加热质量,降低加热炉能耗。 相似文献
9.
Multiple measures, such as multiple content domains or multiple types of performance, are used in various testing programs to classify examinees for screening or selection. Despite the popular usages of multiple measures, there is little research on classification consistency and accuracy of multiple measures. Accordingly, this study introduces an approach to estimate classification consistency and accuracy indices for multiple measures under four possible decision rules: (1) complementary, (2) conjunctive, (3) compensatory, and (4) pairwise combinations of the three. The current study uses the IRT-recursive-based approach with the simple-structure multidimensional IRT model (SS-MIRT) to estimate the classification consistency and accuracy for multiple measures. Theoretical formulations of the four decision rules with a binary decision (Pass/Fail) are presented. The estimation procedures are illustrated using an empirical data example based on SS-MIRT. In addition, this study applies the estimation procedures to the unidimensional IRT (UIRT) context, considering that UIRT is practically used more. This application shows that the proposed procedure of classification consistency and accuracy could be used with a UIRT model for individual measures as an alternative method of SS-MIRT. 相似文献
10.
Rule Generation Based on Dominance Matrices and Functions 总被引：2，自引：0，他引：2
Rough set theory has proved to be a useful tool for rule induction. But, the theory based on indiscemibility relation or similarity relation cannot induce rules from decision tables with criteria. Greco et al have proposed a new rough set approach based on dominance relation to handle the problems. In this paper, the concept of dominance matrix is put forward and the dominance function is constructed to compute the minimal decision rules that are more general and applicable than the ones induced by the classical rough set theory. In addition,the methodology of simplification is presented to eliminate the redundancy in the rule set. 相似文献
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随着数据技术的迅速发展以及数据库管理系统的广泛应用，被积累的数据越来越多，激增的数据背后隐藏着许多重要的信息，人们希望能够对其进行更深入的分析、研究，从中得到更有价值、有意义、深层次的信息，并且希望这些信息能够对人们的决策有一定的帮助。对决策支持模式，决策表的部分决策支持能力的损失问题，获得决策规则信息的响应时间等进行了论述。 相似文献
13.
提出一种基于Skowron分辨矩阵的既能学习决策分类规则又能学习非决策分类规则方法,目的是获得更一般、更可靠的分类规则,并设计了算法.算法的基本思想是以Skowron分辨矩阵讨论非一致决策系统的属性约简的结果为基础,获得基于分辨矩阵的非一致决策系统的确定性规则.应用例子表明,所提出的算法获得的规则为简洁和高效. 相似文献
14.
龙建明 《石家庄师范专科学校学报》2013,(4):27-32
侦查机关程序性决定具有可诉性,这是公民享有诉权、被侵害权利获得公正救济以及法治国家的必然要求。侦查机关程序性决定可诉性对于防范侦查权滥用与提升刑事程序法地位具有重要意义。我国侦查机关程序性决定可诉性的制度缺失有深刻的历史和现实原因。构建我国侦查机关程序性决定可诉性制度,可从有权起诉的主体、侦查机关及其程序性决定可诉性的范围、有权对程序性决定进行审查的法院以及提起诉讼的程序进行系统设置。 相似文献
15.
编辑决策研究断想 总被引：1，自引：1，他引：1
周国清 《湖南城市学院学报》2008,29(6)
编辑决策贯穿于编辑活动始终,是编辑学的关键范畴,具有重要的研究意义;具体而言包括三个方面:出版产业化环境下编辑决策的一般过程与普遍原理、编辑决策的特殊规律及其实际应用、编辑活动史上编辑决策的现实启示;必须创新研究方法,凝练出具有普遍指导意义的编辑决策理论. 相似文献
16.
《Educational Assessment》2013,18(2):129-153
States are increasingly using test scores as part of the requirements for high school graduation or certification. In these circumstances, a battery of tests or, with writing, analytic traits are considered that usually cover different aspects of the state's content standards. Because pass or fail decisions are made affecting students' futures, the validity of standard-setting procedures and strategies is a major concern. Policymakers and legislators must decide which of these 2 standard-setting strategies to use for making pass or fail decisions for students seeking certification or for meeting a high school graduation requirement. The compensatory strategy focuses on total performance, summing scores across all tests in the battery. The conjunctive strategy requires passing performance for each test in the battery. This article reviews and evaluates compensatory and conjunctive standard-setting strategies. The rationales for each type are presented and discussed. Results from a study comparing the compensatory and conjunctive strategies for a state high school certification writing test provide insight into the problem of choosing either strategy. This article concludes with a set of recommendations for those who must decide which type of standard-setting strategy to use. 相似文献
17.
The effects of different schedule requirements at reinforcement on patterns of responding by pigeons were assessed under conjunctive schedules with comparable response-number requirements, Under one conjunctive schedule (conjunctive fixed-interval fixed-ratio schedule), a response was reinforced after a 6-min interval had elapsedand a specific minimum number of responses had been emitted, Under a second conjunctive schedule, a response was reinforced after the 6-min fixed interval and upon completion of a tandem schedule requirement (conjunctive fixed-interval tandem schedule), This schedule retained the same required minimum number of responses as the first conjunctive schedule, but responses were never reinforced according to a fixed-ratio schedule; the tandem schedule was comprised of a fixed-ratio and a small (.1 to 10.0 sec) fixed-interval schedule, Under the conjunctive fixed-interval fixed-ratio schedule, responding was characterized by an initial pause, an abrupt transition to a high response rate, and a second transition to a lower rate that prevailed or slightly increased up to reinforcement, Under the conjunctive fixed-interval tandem schedule, pauses were extended, response rates were lower, and the initial high rate of responding was generally absent, The above effects depended upon the size of the fixed interval of the tandem schedule, The distinct pattern of responding generated by conjunctive fixed-interval fixed-ratio schedules depends upon occasional reinforcement of fixed-ratio responding and not merely on the addition of a minimum number of required responses. 相似文献
18.
为了获得认知无线电系统更高的频谱利用效率,基于最小总错误概率准则推导了软判决协作频谱感知最优判决门限的闭合表达式,并且分析了各种频谱感知参数对最优判决门限的影响.理论分析表明,所提出的最优门限可以获得虚警概率和漏检概率2种性能指标的折中.从仿真结果可以看出,平均信噪比和软判决方案对最优判决门限影响较大,而样本数量对最优的判决门限几乎无影响.对于MRC和MDC两种软判决方案,随着协作用户数量的增加,最优判决门限值随之增加并且趋近于某一极限值.而对于EGC软判决方案,协作用户数对其最优门限值影响很小. 相似文献
19.
Christiana Th. Nicolaou Maria Evagorou Constantinos Constantinou 《Environmental Education Research》2009,15(1):39-54
This article focuses on the development of decision‐making skills and environmental concern by 11‐ and 12‐year‐old students through computer‐based, scaffolded learning activities. The enacted activities provided necessary scientific information and allowed for the consideration of multiple aspects of the problem, the study of the effects of every possible solution and the formulation and balancing of criteria. The optimization strategy for decision making was adopted, because it allows for the development of compensatory thinking which is more relevant to actual situations of decision making. Twelve students participated in the pilot enactment of the proposed activities. Data collection relied on students’ reports and pre‐ and post‐ tests as well as a closed questionnaire designed to measure students’ environmental concern. The teaching intervention proved quite successful in enhancing the decision‐making skills of the participating children. Moreover, students’ performance on the environmental concern questionnaire correlated in interesting ways with the improvement of decision‐making skills. 相似文献
20.
对田径“零抢跑”竞赛规则的若干思考 总被引：1，自引：0，他引：1
以国际田联竞赛规则中对抢跑规则的最新改动以"零抢跑"为主线,结合竞赛规则与竞技赛场战术的相互推动发展,多维度对指导规则变化的因素进行分析,通过对新规则变动的若干深层次的思考,以使对田径"零抢跑"竞赛规则有一个理性的认识和把握,旨在为我国田径运动的良性发展提供理论参考。 相似文献