Quantification of complicated surface morphology of soil crack is a prerequisite and key to soil crack study. This paper takes soil crack quads in Yuanmou arid-hot valley region as examples, selecting several morpholo...Quantification of complicated surface morphology of soil crack is a prerequisite and key to soil crack study. This paper takes soil crack quads in Yuanmou arid-hot valley region as examples, selecting several morphological indicators, and analyzes the soil crack＇s morphological features under various development degrees. By statistic analysis, three quantitative indicators for surface morphology are selected, namely soil crack area density, area weighted mean fractal dimension and connectivity index R, which can not only express the development intensity of soil cracks, but also effectively describe its morphological complexity and connectivity. The research results set a good base for the establishment of soil crack assessment system in Yuanmou arid-hot valley region.展开更多
This article compares how people with normal bodies and bodies that deviate from dominant media-depicted body ideals, live with and accept their bodies. Media images of ideal bodies encompass judging gazes. These gaze...This article compares how people with normal bodies and bodies that deviate from dominant media-depicted body ideals, live with and accept their bodies. Media images of ideal bodies encompass judging gazes. These gazes affect and discipline people and may make it challenging for them to accept their bodies. The data material is part of the interdisciplinary Nordic project called “Beauty comes from within: looking good as a challenge in health promotion”. Based on 20 interviews with Norwegian men and women, of whom 10 have particular appearance-related problems, the article discusses the relationship between the media-depicted body ideals, descriptions by informants of what a good-looking body is, body satisfaction and body practices. The article shows resonance between how people describe good-looking bodies and satisfaction or not with own bodies. Women express more dissatisfaction with their bodies than men, but the article shows that many have strategies for trying to accept their bodies as they are. The comparative perspective highlight that the people having deviant bodies, more than those with normal bodies, balance the idea of “being myself” with the idea of “doing the best out of my (bodily) situation”. Most interestingly, they show that it is harder to accept handicaps that are changeable, like overweight, than harelips, deformed legs and skin injuries. As such, overweight becomes a double burden.展开更多
Potential failures of electronic instrument are very common in the engineering practice.In this paper,potential failure state model is analyzed based on dynamic characteristics of electronic instrument at work and a c...Potential failures of electronic instrument are very common in the engineering practice.In this paper,potential failure state model is analyzed based on dynamic characteristics of electronic instrument at work and a comprehensive method of judging multi-state reliability is put forward.Then,a multi-state electronic instrument reliability analysis model is built based on Bayesian Networks(BN).Considering the failure-potential failure-normal work states,the model is built to estimate reliability of the system and the conditional probability of the elements.Finally,the model is proved corrective and effective by examples.展开更多
'I know all about people,' the professor says. I teach psychology①, and I have studied people for many years. This one is fat. He eats too much. This one is sick. I can tell② by his face. I see boys and girl...'I know all about people,' the professor says. I teach psychology①, and I have studied people for many years. This one is fat. He eats too much. This one is sick. I can tell② by his face. I see boys and girls, men and women all day. I know about people.' I have lived on a farm all my life, ' the farmer answers. 'I展开更多
The use of programming online judges(POJs)has risen dramatically in recent years,owing to the fact that the auto-evaluation of codes during practice motivates students to learn programming.Since POJs have greater numb...The use of programming online judges(POJs)has risen dramatically in recent years,owing to the fact that the auto-evaluation of codes during practice motivates students to learn programming.Since POJs have greater number of pro-gramming problems in their repository,learners experience information overload.Recommender systems are a common solution to information overload.Current recommender systems used in e-learning platforms are inadequate for POJ since recommendations should consider learners’current context,like learning goals and current skill level(topic knowledge and difficulty level).To overcome the issue,we propose a context-aware practice problem recommender system based on learners’skill level navigation patterns.Our system initially performs skill level navigation pattern mining to discover frequent skill level navigations in the POJ and tofind learners’learning goals.Collaborativefiltering(CF)and con-tent-basedfiltering approaches are employed to recommend problems in the cur-rent and next skill levels based on frequent skill level navigation patterns.The sequence similarity measure is used tofind the top k neighbors based on the sequence of problems solved by the learners.The experiment results based on the real-world POJ dataset show that our approach considering the learners’cur-rent skill level and learning goals outperforms the other approaches in practice problem recommender systems.展开更多
基金the National Natural Science Foundation of China (30470297)the National Key Technologies Research and Development Program in the Eleventh Five-Year Plan of China (2006BAC01A11)the Youth Foundation of Institute of Mountain Hazards and Environment of Chinese Academy of Sciences
文摘Quantification of complicated surface morphology of soil crack is a prerequisite and key to soil crack study. This paper takes soil crack quads in Yuanmou arid-hot valley region as examples, selecting several morphological indicators, and analyzes the soil crack＇s morphological features under various development degrees. By statistic analysis, three quantitative indicators for surface morphology are selected, namely soil crack area density, area weighted mean fractal dimension and connectivity index R, which can not only express the development intensity of soil cracks, but also effectively describe its morphological complexity and connectivity. The research results set a good base for the establishment of soil crack assessment system in Yuanmou arid-hot valley region.
文摘This article compares how people with normal bodies and bodies that deviate from dominant media-depicted body ideals, live with and accept their bodies. Media images of ideal bodies encompass judging gazes. These gazes affect and discipline people and may make it challenging for them to accept their bodies. The data material is part of the interdisciplinary Nordic project called “Beauty comes from within: looking good as a challenge in health promotion”. Based on 20 interviews with Norwegian men and women, of whom 10 have particular appearance-related problems, the article discusses the relationship between the media-depicted body ideals, descriptions by informants of what a good-looking body is, body satisfaction and body practices. The article shows resonance between how people describe good-looking bodies and satisfaction or not with own bodies. Women express more dissatisfaction with their bodies than men, but the article shows that many have strategies for trying to accept their bodies as they are. The comparative perspective highlight that the people having deviant bodies, more than those with normal bodies, balance the idea of “being myself” with the idea of “doing the best out of my (bodily) situation”. Most interestingly, they show that it is harder to accept handicaps that are changeable, like overweight, than harelips, deformed legs and skin injuries. As such, overweight becomes a double burden.
基金supported by the Natural Science Foundation of China(No.60971092)
文摘Potential failures of electronic instrument are very common in the engineering practice.In this paper,potential failure state model is analyzed based on dynamic characteristics of electronic instrument at work and a comprehensive method of judging multi-state reliability is put forward.Then,a multi-state electronic instrument reliability analysis model is built based on Bayesian Networks(BN).Considering the failure-potential failure-normal work states,the model is built to estimate reliability of the system and the conditional probability of the elements.Finally,the model is proved corrective and effective by examples.
文摘'I know all about people,' the professor says. I teach psychology①, and I have studied people for many years. This one is fat. He eats too much. This one is sick. I can tell② by his face. I see boys and girls, men and women all day. I know about people.' I have lived on a farm all my life, ' the farmer answers. 'I
文摘The use of programming online judges(POJs)has risen dramatically in recent years,owing to the fact that the auto-evaluation of codes during practice motivates students to learn programming.Since POJs have greater number of pro-gramming problems in their repository,learners experience information overload.Recommender systems are a common solution to information overload.Current recommender systems used in e-learning platforms are inadequate for POJ since recommendations should consider learners’current context,like learning goals and current skill level(topic knowledge and difficulty level).To overcome the issue,we propose a context-aware practice problem recommender system based on learners’skill level navigation patterns.Our system initially performs skill level navigation pattern mining to discover frequent skill level navigations in the POJ and tofind learners’learning goals.Collaborativefiltering(CF)and con-tent-basedfiltering approaches are employed to recommend problems in the cur-rent and next skill levels based on frequent skill level navigation patterns.The sequence similarity measure is used tofind the top k neighbors based on the sequence of problems solved by the learners.The experiment results based on the real-world POJ dataset show that our approach considering the learners’cur-rent skill level and learning goals outperforms the other approaches in practice problem recommender systems.
