基于马尔可夫模型的容错系统可靠性分析     

王社伟陶军  高玉宝 《上海海事大学学报》2001,22(3):190-192

容错系统的可靠性分析是容错系统设计过程中最重要的步骤之一.在容错控制系统的可靠性分析中,利用马尔可夫过程和半马尔可夫过程理论对容错系统进行可靠性建模能够较为真实地描述系统的实际工作情况.但是,由于容错系统为了达到高可靠性而采用了大量的冗余配置及重构技术,使得该可靠性模型往往变得相当复杂.因此,对系统可靠性模型进行必要的化简,可以减少许多计算量并使该模型更加符合实际使用要求.  相似文献   

“互联网+”背景下学前儿童家长成长教育课程资源的建设现状与改善策略探讨     

黄淑芬 《清远职业技术学院学报》2022,(1)

0-6岁学前儿童家长学习意愿强,手机操作和互联网使用熟练,建设科学合理系统的学前儿童家长成长课程资源将有利于提升家庭教育质量。结合互联网+平台数据分析可知,现有的0-6岁学前儿童家长互联网成长平台多为企业搭建,以盈利为主要目的,提供优质用户体验为特色,但教育课程资源呈现不专业、不系统,公益性不足,成长性不够的特点。建议政府和教育部门应加强家长成长教育课程资源平台的质量和迭代的监控,加强优质国外家庭教育资源的译介,加强企业和非企业优势互补的合作,加强关注家长自身成长的教育课程资源建设。  相似文献   

The Analysis of Chapter One of Pride and Prejudice——Via Material Processes and Relational Processes     

赵晶 《环球赛鸽科技》2015,(8)

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宣城市30万Nm／d液化天然气项目设计简介     

梅从保 《大众科技》2013,(8):30-31

文章简单介绍宣城市30万Nm／d液化天然气项目的设计，并对设计中难以把握或容易出错的地方做了重点说明。  相似文献   

Do karate fighters use situational probability information to improve decision-making performance during on-mat tasks?     

Nicolas Milazzo  Damian Farrow  Alexis Ruffault  Jean F. Fournier 《Journal of sports sciences》2016,34(16):1547-1556

This study examined the contribution of situational probability information to the perceptual and cognitive processes underlying decision-making behaviour during in situ Karate performance. Experts and novices were required to make decisions about various attacks in different fight scenarios. The order in which the fight situations were presented was modified in order to provide advanced probability information and identify whether fighters were able to use the latter information to make better decisions. Specifically, one of the attacks was repeated every four actions. Results revealed that experts were more accurate and faster than their less skilled counterparts to block and counterattack the opponent. The experts picked up the occurrence of the attack pattern after the fifth repetition whereas novices did not. This enabled experts to improve decision time and decision accuracy. Findings suggest that such superiority could stem from the perceptual and cognitive skills possessed by the experts, thus giving them the opportunity to recognise a situation more easily. This was reinforced by gaze behaviour which demonstrated that experts used a more efficient search strategy involving fewer fixations of longer duration on a lesser number of areas relative to the novices. Moreover, experts generated more refined karate-specific knowledge structures compared with the novices.  相似文献   

广义马氏过程及其熵率     

张景晓  连秀国  李光芹  姜曰华 《临沂师范学院学报》2004,26(3):26-28

讨论了k步广义马氏过程及其时间不变性和平稳性，给出了熵率的两种定义，说明了其等价性，还给出了平稳的广义马氏链熵率的计算公式．  相似文献   

两指标宽过去马氏性的等价形式     

杜保建 《安阳师范学院学报》2003,(5):1-2

证明了两指标宽过去马氏性各种形式的等价性。  相似文献   

“I Heard it through the Grapevine”: Doctoral Student Socialization in Chemistry and History   总被引：2，自引：0，他引：2  

Susan K. Gardner 《Higher Education》2007,54(5):723-740

Twenty doctoral students in the disciplines of chemistry and history were interviewed to better understand the socialization processes that influence their success and how these processes differ by year in the degree program and disciplinary culture. Five major themes emerged describing these socialization processes and how they facilitate or impede degree success, including Ambiguity, describing the programmatic guidelines and expectations that surrounded much of the students’ experience; Balance, pointing to the students’ need to balance graduate school responsibilities along with external relationships and demands; Independence, describing the students’ desire to find equilibrium as they transitioned to the role of independent scholar; Development, highlighting the significant cognitive, personal, and professional development that occurs in these students’ graduate experience; and Support, describing the faculty, peer, and financial support needed for the students’ success in their degree programs. Suggestions for policy, practice, and further research are discussed.  相似文献   

Mathematical Modeling in the Primary School: Children's Construction of a Consumer Guide     

Lyn D. English 《Educational Studies in Mathematics》2006,63(3):303-323

This paper examines 6th grade children's local conceptual development and mathematization processes as they worked a comprehensive mathematical modeling problem (creating a consumer guide for deciding the best snack chip) over several class periods. The children and their teachers were participating in a 3-year longitudinal teaching experiment in which sequences of mathematical modeling problems were implemented from the 5th grade (10 years of age) though to the 7th grade. In contrast to traditional problem solving, mathematical modeling requires children to generate and develop their own mathematical ideas and processes, and to form systems of relationships that are generalizable and reusable. Reported here is a detailed analysis of the iterative cycles of development of one group of children as they worked the problem, followed by a summary of the mathematization processes displayed by all groups. Children's critical reflections on their models are also reported. The results show how children can independently develop constructs and processes through meaningful problem solving. Children's development included creating systems for operationally defining constructs; selecting, categorizing, and ranking factors; quantifying quantitative and qualitative data; and transforming quantities.  相似文献   

多指标随机过程弱对称0－1律     

黄建安 《湖南师范大学教育科学学报》1996,(2)

本文证明了多指标平稳随机过程的弱对称０－１律，推广了朱成熹在单指标情形下的有关结果  相似文献