Bayesian reasoning in avalanche terrain: a theoretical investigation     

Philip A. Ebert 《Journal of Adventure Education & Outdoor Learning》2019,19(1):84-95

In this article, I explore a Bayesian approach to avalanche decision-making. I motivate this perspective by highlighting a version of the base-rate fallacy and show that a similar pattern applies to decision-making in avalanche-terrain. I then draw out three theoretical lessons from adopting a Bayesian approach and discuss these lessons critically. Lastly, I highlight a number of challenges for avalanche educators when incorporating the Bayesian perspective in their curriculum.  相似文献   

Digital Module 09: Sociocognitive Assessment for Diverse Populations https://ncme.elevate.commpartners.com     

Robert J. Mislevy  Maria Elena Oliveri 《Educational Measurement》2019,38(4):110-111

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Enhancing young children's arithmetic skills through non-intensive,computerised kindergarten interventions: A randomised controlled study     

《Teaching and Teacher Education》2014

Children in kindergarten were randomly assigned to adaptive computerised counting or comparison interventions, or to a business-as-usual control group. Children in both intervention groups, including children with poor calculation skills at the start of the intervention, performed better than controls in the posttest. However the effects of training held in grade 1, playing serious counting games improving number knowledge and mental arithmetic performances, and playing serious comparison games, only enhanced the number knowledge proficiency in grade 1. The value of these short periods of intensive gaming in kindergarten are discussed as a look-ahead approach to enhance arithmetic proficiency.  相似文献   

Monte Carlo模拟在聚合反应速率常数估算中的运用     

罗正鸿  詹晓力  阳永荣 《上海大学学报(英文版)》2006,10(3):274-276

1 Introduction It is i mportant to study polymerization mechanisminpolymerization engineering. Obtaining kinetic data isthe key step for establishing polymerization mechanismand understanding elementary reactions . The kineticdata contains two groups of data ,i.e.,the rate andreaction order .The rate ,especially the rate constant ,is i mportant and to be esti mated assuming that the or-der of the reactionis known.Furthermore ,esti mationof rate constants for polymerization is an active anddif…  相似文献   

一类过程A的E｜_∞｜~2表现与估计     

刘丁酉  胡必锦 《赣南师范学院学报》1997,(6)

本文针对不同的停时类型讨论了一类典型过程Ａ的对偶可料投影Ａ～之Ｅ｜Ａ～∞｜２的表现，并由此表现得到了它的估计，从而对［１］中相应结论给出了有意义的修正。  相似文献   

参数点估计的无偏性     

陈颖 《唐山学院学报》2008,21(2):42-43

在总体为二项分布下,讨论参数点估计的无偏性,得出了无偏估计不一定存在、不唯一的结论。  相似文献   

Application of honey-bee mating optimization on state estimation of a power distribution system including distributed generators   总被引：1，自引：0，他引：1  

Taher Niknam 《浙江大学学报(A卷英文版)》2008,9(12):1753-1764

We present a new approach based on honey-bee mating optimization to estimate the state variables in distribution networks including distributed generators. The proposed method considers practical models of electrical equipments such as static var compensators, voltage regulators, and under-load tap changer transformers, which have usually nonlinear and discrete characteristics. The feasibility of the proposed approach is demonstrated by comparison with the methods based on neural networks, ant colony optimization, and genetic algorithms for two test systems, a network with 34-bus radial test feeders and a realistic 80-bus 20 kV network.  相似文献   

一个基于朴素贝叶斯方法的RSS分类器     

谢枫平 《闽西职业技术学院学报》2008,10(4)

RSS是一种基于RDF／XML描述的全新的互联网信息获取方式。但目前,RSS文档的分类完全依赖于预先设定,对于适应用户多变的需求存在着明显的不足。朴素贝叶斯分类器是解决自然语言文本文档分类问题的最有效的方法之一。通过构造朴素贝叶斯学习器,用户可以构造出符合自己要求的RSS分类结构。实验结果表明,这种基于朴素贝叶斯方法的分类器。可以很好地实现对RSS文档的自动分类。  相似文献   

Time-domain training sequences design for MIMO OFDM channel estimation     

Zhen Lu  Jian-hua Ge 《浙江大学学报(A卷英文版)》2008,9(4):464-469

This paper describes a Least Squares （LS） channel estimation scheme for MIMO OFDM systems based on time-domain training sequence. We first compute the minimum mean square error （MSE） of the LS channel estimation, and then derive the optimal criteria of the training sequence with respect to the minimum MSE. It is shown that optimal time-domain training sequence should satisfy two criteria. First, the autocorrelation of the sequence transmitted from the same antenna is an impulse function in a region longer than the channel maximum delay. Second, the cross-correlation between sequences transmitted from different antennas is zero in this region. Simulation results show that the estimator using optimal time-domain training sequences has better performance than that using optimal frequency training sequence at low signal-to-noise ratio （SNR）. To reduce the training overhead, a suboptimal training sequence is also proposed. Comparing with optimal training sequence, it has low computation complexity and high transmission efficiency at the expense of little performance degradation.  相似文献   

Protein nanotechnology — A powerful futuristic diagnostic technique     

P. D. Gupta  Manasi Dave  A. R. Vasavada 《Indian journal of clinical biochemistry : IJCB》2005,20(2):48-53

Healthcare can be maintained well, when diagnosis is quick, accurate, cost-effective and painless. DNA and RNA based diagnosis may not reveal the right information for certain diseases. Identification and quantification of proteins and their folding mechanism are very important in diagnosis of diseases. Small quantities of proteins, which generally escape from detection and are responsible for the diseases, now can be quantified by protein nanotechniques which aids in the diagnosis. In this review, we have summarized the recent developments in nanotechnologies such as protein microarrays, biosensors etc. and their application in diagnosis of diseases at proteomics level have also been discussed.  相似文献