期刊文献+
共找到465篇文章
< 1 2 24 >
每页显示 20 50 100
Consistent Criteria for checking Hypotheses
1
作者 Laura Eliauri Malkhaz Mumladze Zurab Zerakidze 《Journal of Mathematics and System Science》 2013年第10期514-518,共5页
This paper we study a consistent criterion for checking Hypotheses. Given definition of consistent criterion for checking hypotheses for family probability measures which were defined by Z. Zerakidze (see 5). We pro... This paper we study a consistent criterion for checking Hypotheses. Given definition of consistent criterion for checking hypotheses for family probability measures which were defined by Z. Zerakidze (see 5). We prove the necessary and sufficient conditions are obtained for the existence of consistent criteria of hypotheses. For example we clearly build of a consistent criteria for checking hypotheses. 展开更多
关键词 Consistent criterion ORTHOGONAL SEPARABLE hypotheses.
在线阅读 下载PDF
生态警务建设视域下污染环境刑事案件侦查路径研究——基于贝叶斯定理的概率路径
2
作者 郭冠廷 《贵州警察学院学报》 2026年第1期120-128,共9页
污染环境刑事案件的侦查是生态警务建设的重要组成部分。实践中由于犯罪呈现专业性和技术性,作为侦查工作中心环节之一的证据搜集与推论易陷入困境,难以基于证据回溯案件事实,因而出现行政干预司法、行政替代司法等现象。贝叶斯定理及... 污染环境刑事案件的侦查是生态警务建设的重要组成部分。实践中由于犯罪呈现专业性和技术性,作为侦查工作中心环节之一的证据搜集与推论易陷入困境,难以基于证据回溯案件事实,因而出现行政干预司法、行政替代司法等现象。贝叶斯定理及其变式能够提供证明力的量化评估方法,为侦查人员分析评价科学证据和校验侦查假设的概率进路。生态警务建设应当重构认识论和方法论以破除认知壁垒,坚持群众路线,充分发挥人民主体作用,将贝叶斯定理纳入大数据时代数据赋能建设过程,是贝叶斯定理融入污染环境刑事案件证据分析与评价及事实查明的现实可行路径。 展开更多
关键词 生态警务 污染环境 侦查假设 贝叶斯定理
在线阅读 下载PDF
AIGC背景下大学生跨文化交际能力的培养研究
3
作者 刘媛 《科学咨询》 2026年第3期288-292,共5页
AIGC(生成式人工智能)作为人工智能领域的新兴力量,为高等教育带来了新的契机与挑战。该研究聚焦于AIGC背景下高校大学生跨文化交际能力的培养,从Stephen D.Krashen假说视角出发,探讨如何在生成式人工智能技术的辅助下,更有效地培养学... AIGC(生成式人工智能)作为人工智能领域的新兴力量,为高等教育带来了新的契机与挑战。该研究聚焦于AIGC背景下高校大学生跨文化交际能力的培养,从Stephen D.Krashen假说视角出发,探讨如何在生成式人工智能技术的辅助下,更有效地培养学生的跨文化交际能力。该文分析了AIGC融入该能力培养的价值意蕴和现实挑战,并根据Krashen假说的内在逻辑,提出其应用于该培养的创新策略和多元化构想,以期为提高大学生跨文化交际能力提供有益的实践参考和建议。 展开更多
关键词 AIGC(生成式人工智能) 高等教育 Krashen假说 文化交流 跨文化交际 人才培养
在线阅读 下载PDF
MULTITARGET STATE AND TRACK ESTIMATION FOR THE PROBABILITY HYPOTHESES DENSITY FILTER 被引量:3
4
作者 Liu Weifeng Han Chongzhao +2 位作者 Lian Feng Xu Xiaobin Wen Chenglin 《Journal of Electronics(China)》 2009年第1期2-12,共11页
The particle Probability Hypotheses Density (particle-PHD) filter is a tractable approach for Random Finite Set (RFS) Bayes estimation, but the particle-PHD filter can not directly derive the target track. Most existi... The particle Probability Hypotheses Density (particle-PHD) filter is a tractable approach for Random Finite Set (RFS) Bayes estimation, but the particle-PHD filter can not directly derive the target track. Most existing approaches combine the data association step to solve this problem. This paper proposes an algorithm which does not need the association step. Our basic ideal is based on the clustering algorithm of Finite Mixture Models (FMM). The intensity distribution is first derived by the particle-PHD filter, and then the clustering algorithm is applied to estimate the multitarget states and tracks jointly. The clustering process includes two steps: the prediction and update. The key to the proposed algorithm is to use the prediction as the initial points and the convergent points as the es- timates. Besides, Expectation-Maximization (EM) and Markov Chain Monte Carlo (MCMC) ap- proaches are used for the FMM parameter estimation. 展开更多
关键词 Probability hypotheses Density (PHD) Particle-PHD filter State and track estimation Finite mixture models
在线阅读 下载PDF
Limited negative semantics based inductive hypotheses
5
作者 叶风 王亚东 +1 位作者 徐晓飞 权光日 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1999年第3期5-9,共5页
The Learning method of inductive logic programming evaluates the the quality of inductive hypotheses commonlyby how well the hypotheses cover training examples extensionally. Ths kind of evalution will be completely i... The Learning method of inductive logic programming evaluates the the quality of inductive hypotheses commonlyby how well the hypotheses cover training examples extensionally. Ths kind of evalution will be completely inapplica-ble to the situation where there are non-simple or noise examples. Based on Limited Negative semantics, This paperextends induction of simple examples to that of generalized ones and presents 3 criteria on accepting inductive hypothe-ses in order to fit for different goals of induction. The relation between inductive hypotheses and background knowledgeis also established in this Paper. The conclusions in this paper are helpful to implement learning algorithms and to ex-tend application fields of ILP. 展开更多
关键词 machine learning INDUCTIVE logic PROGRAMMING generalized EXAMPLES INDUCTIVE hypotheses
在线阅读 下载PDF
Two Hypotheses of “Melanization” on Electrogalvanized Steel Surface
6
作者 Ning LT, Derui ZHOU and Deyu LI Dept. of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China Kurachi Mitsuo Kyoto University, Kyoto 606-8283, Japan E-mail: liningt@ihw.com.cn 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第3期343-345,共3页
Melanization is harmful to the lightness of galvanized steel surface and also reduces the bonding force between a paint coat and the steel sheet. Experimental results showed that the hypothesis of Zn-Pb codeposition d... Melanization is harmful to the lightness of galvanized steel surface and also reduces the bonding force between a paint coat and the steel sheet. Experimental results showed that the hypothesis of Zn-Pb codeposition does not hold true, while the fact that PbSO4 micelles in sulfate bath settle on the coating surface support the second hypothesis. The authors come to the conclusions that (1) Any measure to eliminate PbSO4 micelles before or after passivation of the coating will prevent melanization; (2) PbSO4 micelles adsorbed on the surface of passivated film promote the growth of oxygen-deficient Zn oxide and result in the generation of melanization. 展开更多
关键词 Two hypotheses of MELANIZATION PB
在线阅读 下载PDF
Sequential Test of Fuzzy Hypotheses
7
作者 Mohammad Ghasem Akbari 《Open Journal of Statistics》 2011年第2期87-92,共6页
In testing statistical hypotheses, as in other statistical problems, we may be confronted with fuzzy concepts. This paper deals with the problem of testing hypotheses, when the hypotheses are fuzzy and the data are cr... In testing statistical hypotheses, as in other statistical problems, we may be confronted with fuzzy concepts. This paper deals with the problem of testing hypotheses, when the hypotheses are fuzzy and the data are crisp. We first give new definitions for notion of mass (density) probability function with fuzzy parameter, probability of type I and type II errors and then state and prove the sequential probability ratio test, on the basis of these new errors, for testing fuzzy hypotheses. Numerical examples are also provided to illustrate the approach. 展开更多
关键词 CANONICAL FUZZY Number FUZZY hypotheses Type I and II ERROR SIZES SEQUENTIAL PROBABILITY Ratio Test
在线阅读 下载PDF
Why It Is Problematic to Calculate Probabilities of Findings Given Range Null Hypotheses
8
作者 David Trafimow 《Open Journal of Statistics》 2017年第3期483-499,共17页
An important problem with null hypothesis significance testing, as it is normally performed, is that it is uninformative to reject a point null hypothesis [1]. A way around this problem is to use range null hypotheses... An important problem with null hypothesis significance testing, as it is normally performed, is that it is uninformative to reject a point null hypothesis [1]. A way around this problem is to use range null hypotheses [2]. But the use of range null hypotheses also is problematic. Aside from the usual issues of whether null hypothesis significance tests can be justified at all, there is an issue that is specific to range null hypotheses. It is not straightforward how to calculate the probability of the data given a range null hypothesis. The traditional way is to use the single point that maximizes the obtained p-value. The Bayesian alternative is to propose a prior probability distribution and integrate across it. Because frequentists and Bayesians disagree about a variety of issues, especially those pertaining to whether it is permissible to assign probabilities to hypotheses, and what gets lost in the shuffle is that the two camps actually come to different answers for the probability of the data given a range null hypothesis. Because the probability of the data given the hypothesis is a precursor for both camps, for drawing conclusions about hypotheses, different values for this probability for the different camps is crucial but seldom acknowledged. The goal of the present article is to bring out the problem in a manner accessible to researchers without strong mathematical or statistical backgrounds. 展开更多
关键词 RANGE hypotheses One-Tailed Test RANGE NULL HYPOTHESIS Uninformative hypotheses
暂未订购
Constrained Bayesian Method for Testing the Directional Hypotheses
9
作者 Kartlos J. Kachiashvili N. K. Bansal I. A. Prangishvili 《Journal of Mathematics and System Science》 2018年第4期96-118,共23页
The paper discusses the generalization of constrained Bayesian method (CBM) for arbitrary loss functions and its application for testing the directional hypotheses. The problem is stated in terms of false and tru... The paper discusses the generalization of constrained Bayesian method (CBM) for arbitrary loss functions and its application for testing the directional hypotheses. The problem is stated in terms of false and true discovery rates. One more criterion of estimation of directional hypotheses tests quality, the Type III errors rate, is considered. The ratio among discovery rates and the Type III errors rate in CBM is considered. The advantage of CBM in comparison with Bayes and frequentist methods is theoretically proved and demonstrated by an example. 展开更多
关键词 CBM Bayesian test hypotheses testing false discovery rate type error rate.
在线阅读 下载PDF
Hypotheses of "Harmonious Man": The Humanity Upgrade of Management and It's Sustainability Significance
10
作者 SHunzhong XIA Guizhen YANG Yizhen WANG 《International English Education Research》 2015年第9期52-55,共4页
Hypotheses of humanity is the logical premise and foundation of institution design and perfect. "Political man" had boosted the sprout of ancient democracy polity, "economic man" has accelerated the development of... Hypotheses of humanity is the logical premise and foundation of institution design and perfect. "Political man" had boosted the sprout of ancient democracy polity, "economic man" has accelerated the development of market economy in immediate and modern times, "free man" described the blueprint of future society, and "harmonious man" will promote the construction of harmonious society and the development of management to conducting oneself so as to serve others. The article explains the theory headstream, abstract ways, basic intension and sustainability effect to the hypotheses of"harmonious man". 展开更多
关键词 humanity hypotheses harmonious man conducting oneself so as to serve others sustainability.
在线阅读 下载PDF
Reasons for Modern Warming:Hypotheses and Facts
11
作者 Nikolai Nikolaevich Zavalishin 《Journal of Atmospheric Science Research》 2022年第1期11-17,共7页
Two hypotheses of modern warming are considered:natural and anthro­pogenic.The probabilities of each of them are compared.It is proved that the hypothesis of natural warming is much more likely than the hypothesi... Two hypotheses of modern warming are considered:natural and anthro­pogenic.The probabilities of each of them are compared.It is proved that the hypothesis of natural warming is much more likely than the hypothesis of anthropogenic warming.It is shown that the displacement of the Sun from the center of mass of the solar system directly affects the temperature of the surface atmosphere in the synoptic regions of Eurasia.This result corresponds to the model of E.P.Borysenkov with variations of the solar constant or,equivalently,with variations of the Bond albedo. 展开更多
关键词 hypotheses NATURAL ANTHROPOGENIC Temperature Lower atmosphere ALBEDO Solar displacement
在线阅读 下载PDF
Unraveling the enigma of salivary uric acid in periodontitis:Independent association,mechanistic insights,and future trajectories
12
作者 Dan-Dan Shi Jing Ding Ju Tian 《World Journal of Clinical Cases》 2025年第27期125-130,共6页
This article explores the association between salivary uric acid(UA)and periodontitis,systematically analyzing its dual roles and research progress.Studies indicate that UA acts as a primary antioxidant in saliva unde... This article explores the association between salivary uric acid(UA)and periodontitis,systematically analyzing its dual roles and research progress.Studies indicate that UA acts as a primary antioxidant in saliva under physiological conditions(accounting for 70%),protecting periodontal tissues by scavenging reactive oxygen species.However,when gum disease becomes severe,UA can switch roles and fuel inflammation,worsening tissue damage.Lorente et al’s research found an independent inverse correlation between salivary UA levels and periodontitis severity(odds ratio=6.14,P=0.001),establishing 111 nmol/mL as a diagnostic threshold(area under the curve=66%).Nevertheless,limitations include sample heterogeneity and failure to distinguish between gingivitis and periodontitis.Mechanistically,three hypotheses are proposed:The Antioxidant Depletion Hypothesis(UA oxidation consumption leading to feedback loops),the Microbial Metabolic Hijacking Hypothesis(pathogens utilizing UA as a carbon source to disrupt redox balance),and the Epithelial Barrier Dysfunction Hypothesis(UA deficiency causing downregulation of tight junction proteins).Future research should prioritize longitudinal cohorts to validate predictive value,integrate multi-omics to explore dysregulated signatures,and develop UA supplementation or targeted antioxidant therapies.This study provides novel insights into periodontitis diagnosis and mechanisms,advancing the application of salivary biomarkers in precision periodontics. 展开更多
关键词 Diagnostic biomarkers Mechanistic hypotheses Oxidative stress PERIODONTITIS Salivary uric acid
暂未订购
Parallel Experiments:From The Human Participated to A Virtual-Real Hybrid Paradigm
13
作者 Peijun Ye Xiao Xue +2 位作者 Qinghua Ni Jing Yang Fei-Yue Wang 《IEEE/CAA Journal of Automatica Sinica》 2025年第8期1525-1529,共5页
EXPERIMENT is one of the necessary conditions for scientific progress.For cognitive science,neuroscience,biomedical science and other human-related disciplines,experiments involving human subjects can confirm or dispr... EXPERIMENT is one of the necessary conditions for scientific progress.For cognitive science,neuroscience,biomedical science and other human-related disciplines,experiments involving human subjects can confirm or disprove scientific hypotheses in a controlled and systematic manner,while establishing causal relationships between studied variables.These experiments also provide both qualitative and quantitative analysis capable of statistically identifying significant patterns.Thus,solid experiments directly support testable and replicable scientific conclusions.However,limited by the budget as well as the available candidate group,current experiment design selects random subjective in an arbitrary scale,bringing a question that how they can stand for the whole studied population. 展开更多
关键词 human participants virtual real hybrid paradigm scientific progress establishing causal relationships neuroscience confirm disprove scientific hypotheses statistically identifying significant qualitative quantitative analysis
在线阅读 下载PDF
接受域类型差异对多重备选假设数据探测法的影响分析
14
作者 余航 王坚 +2 位作者 王乐洋 宁一鹏 赵伟 《武汉大学学报(信息科学版)》 北大核心 2025年第10期1978-1990,共13页
当先验单位权方差因子已知时,超椭球体或超多面体接受域常被用于多重备选假设数据探测法,以探测与识别观测值中的粗差,但不同接受域类型对该方法的影响缺乏分析。首先,分别基于残差和闭合差构建的Baarda w-检验统计量,综合分析接受域类... 当先验单位权方差因子已知时,超椭球体或超多面体接受域常被用于多重备选假设数据探测法,以探测与识别观测值中的粗差,但不同接受域类型对该方法的影响缺乏分析。首先,分别基于残差和闭合差构建的Baarda w-检验统计量,综合分析接受域类型的差异对检验空间、检验决策概率计算、最小可探测偏差(minimal detectable bias,MDB)及正确识别率的影响,总结了目前3种计算检验决策概率的方法;然后,以二维闭合差的检验空间为基础,揭示了不同接受域类型导致的正确识别率差异与函数模型几何间的对应关系。数值实验结果表明,不同接受域类型不仅会导致MDB的不同,还会影响检验决策概率的大小,导致正确识别率存在差异。分析该差异与模型几何间的关系有助于改善网形设计,降低接受域类型的差异对备选模型正确识别率的影响。 展开更多
关键词 数据探测法 多重假设检验 检验空间 正确识别 最小可探测偏差
原文传递
一种融合Akaike信息检验的多粗差识别方法
15
作者 余航 宁一鹏 +1 位作者 李黎 赵伟 《苏州科技大学学报(自然科学版)》 2025年第1期66-73,共8页
对于多粗差的识别问题,可通过建立多重备选假设模型,构建局部检验统计量,并以最大值统计量作为识别粗差的依据。然而,当粗差量级较大时,由于数值计算精度的问题,最大统计量反而无法区分两个或多个备选假设模型,导致“湮没”现象频发。... 对于多粗差的识别问题,可通过建立多重备选假设模型,构建局部检验统计量,并以最大值统计量作为识别粗差的依据。然而,当粗差量级较大时,由于数值计算精度的问题,最大统计量反而无法区分两个或多个备选假设模型,导致“湮没”现象频发。本文提出将Akaike信息检验与多粗差识别方法进行融合应用,在不改变多粗差识别方法中探测、识别与调节改正框架的基础上,通过以Akaike信息最小为准则确定备选模型,避免上述“湮没”现象的发生。数值实验结果表明,相较于迭代数据探测法,融合Akaike信息检验的多粗差识别方法对于量级较大的多粗差问题具有较好的识别成功率,且粗差识别过程中该方法不受整体虚警率的影响。 展开更多
关键词 多重备选假设 Akaike信息检验 粗差探测 迭代数据探测法
在线阅读 下载PDF
贝叶斯认识论先验问题探析——主观与客观视角下的局限性与新思路
16
作者 李欢 王幼军 《沧州师范学院学报》 2025年第2期113-120,共8页
先验问题作为贝叶斯认识论中的核心问题之一,涉及认知主体应该基于何种规范来合理地约束假设的先验置信度。主观贝叶斯主义和客观贝叶斯主义对该问题解决方案存在显著的分歧。主观贝叶斯主义认为,应基于个人偏好和背景知识来设定假设的... 先验问题作为贝叶斯认识论中的核心问题之一,涉及认知主体应该基于何种规范来合理地约束假设的先验置信度。主观贝叶斯主义和客观贝叶斯主义对该问题解决方案存在显著的分歧。主观贝叶斯主义认为,应基于个人偏好和背景知识来设定假设的先验置信度,强调先验置信度分布只需符合概率论公理的一致性规范;客观贝叶斯主义则强调将无偏见的认知美德纳入约束先验置信度的规范,主张假设的先验置信度除了遵循概率论公理的一致性规范外,应增添无差别原则作为先验置信度的额外约束。两种方案都旨在通过不同的路径对科学推理进行细致的刻画,进而增进对科学推理的理解,但它们对于先验问题的理解与应对方案都有其局限性。在贝叶斯认识论的基础上引入最佳解释推理,创新性地提出解释主义贝叶斯理论,基于假设对证据的解释力来进一步规范先验置信度,使其在一定程度上避免主观主义与客观主义视角下所面临的理论难题。 展开更多
关键词 先验置信度 主观贝叶斯主义 客观贝叶斯主义 解释主义贝叶斯理论
在线阅读 下载PDF
物种多样性与生态系统功能:影响机制及有关假说 被引量:113
17
作者 黄建辉 白永飞 韩兴国 《生物多样性》 CAS CSCD 2001年第1期1-7,共7页
本文主要介绍了有关物种多样性对生态系统功能的影响机制及有关假说 ,包括冗余种假说、铆钉假说、不确定假说、无效假说、补偿 /关键种假说、非线性假说、单调 /驼峰模型假说等。尽管这些假说的提出都有一定的理论或实验研究基础 ,但到... 本文主要介绍了有关物种多样性对生态系统功能的影响机制及有关假说 ,包括冗余种假说、铆钉假说、不确定假说、无效假说、补偿 /关键种假说、非线性假说、单调 /驼峰模型假说等。尽管这些假说的提出都有一定的理论或实验研究基础 ,但到目前为止 ,还没有一种假说被普遍认为反映了两者之间关系的实际情形 (如果确实存在这样一种普适机制 )。通过分析 ,我们发现在这些假说之间存在一定的内在联系 ,它们或者互相包含 ,或者互相补充 。 展开更多
关键词 生态系统功能 物种多样性 假说 影响机制
在线阅读 下载PDF
研究中国城市化理论学派述评 被引量:24
18
作者 薛凤旋 蔡建明 《地理研究》 CSSCI CSCD 北大核心 1998年第2期208-216,共9页
中国城市化具有独特性,自70年代以来一直成为学术界的研究热点之一。文中通过对各有关研究的比较和总结,归纳出5种最具代表性和影响力的学说,即反城市主义说、工业战略说、城市二元体系和工农业均衡发展说、工业化和城市偏爱说以... 中国城市化具有独特性,自70年代以来一直成为学术界的研究热点之一。文中通过对各有关研究的比较和总结,归纳出5种最具代表性和影响力的学说,即反城市主义说、工业战略说、城市二元体系和工农业均衡发展说、工业化和城市偏爱说以及综合说,并对各学说进行了评述,指出中国在面临社会经济结构全面转型的历史时期,极有必要借鉴他人的研究方法和成果去建立自己的新理论。 展开更多
关键词 城市化 理论 学说 中国 学派述评
在线阅读 下载PDF
智能模拟人在临床急救模拟教学中的应用 被引量:27
19
作者 谢力 谢鸿 魏华刚 《实验室研究与探索》 CAS 2007年第5期98-100,共3页
模拟现场为临床急救教学提供了良好的技术平台,也是急救教学上一大进步。从而标志着模拟教学改变了书本教学模式,使医学教育更为接近现实。本文将介绍使用智能模拟人作为急救、麻醉或其他医护教学领域的应用,并探讨智能模拟人人在其他... 模拟现场为临床急救教学提供了良好的技术平台,也是急救教学上一大进步。从而标志着模拟教学改变了书本教学模式,使医学教育更为接近现实。本文将介绍使用智能模拟人作为急救、麻醉或其他医护教学领域的应用,并探讨智能模拟人人在其他方面的应用。 展开更多
关键词 智能模拟人 虚拟 急救
在线阅读 下载PDF
假设检验思维策略的发展研究 被引量:9
20
作者 张庆林 杨春燕 《心理科学》 CSSCI CSCD 北大核心 1998年第1期13-16,共4页
运用自编的一个关于规则发现的计算机程序,研究了小学生、中学生和大学生解决问题过程中的形成假设、设计实验、实验检验三个阶段上的“假设-检验”思维策略。结果发现,小学生的假设检验能力比较低,中学生的水平有了明显的发展,中... 运用自编的一个关于规则发现的计算机程序,研究了小学生、中学生和大学生解决问题过程中的形成假设、设计实验、实验检验三个阶段上的“假设-检验”思维策略。结果发现,小学生的假设检验能力比较低,中学生的水平有了明显的发展,中小学阶段是培养儿童科学发现的假设检验能力的关键期。 展开更多
关键词 思维策略 假设检验 发展 心理过程
在线阅读 下载PDF
上一页 1 2 24 下一页 到第
使用帮助 返回顶部