To examine the effect of sleep deprivation （SD） on eye movement be- havior in flight task, four subjects who were skilled in flight simulator participated in the experiment, which were asked to perform a level fligh...To examine the effect of sleep deprivation （SD） on eye movement be- havior in flight task, four subjects who were skilled in flight simulator participated in the experiment, which were asked to perform a level flight task in a flight simulator. Eye movement data and flight performance data were measured at the following hours： 11：00, 15：00, 04：00, 11：00, 15：00. The subjects workload and fatigue were assessed with the method of national aeronautics and space administration-task load index （NASA-TLX） and rating of perceived exertion （RPE）. Eye movement indices of average pupil area, av- erage saceade amplitude and average saccade velocity decreased during the 32 h of SD and they all showed significantly change in the final SD while the index of average fixa- tion time increased in the final SD. Flight performance deteriorated during the 32 h of SD, but not significantly. The feeling of fatigue and workload reported by subjects both increased during the 32 h of SD. Daily rhythm effects on the measured indices were also found, there were a obviously change at the hour of 04：00. 32 h of SD has obvious effect on eye movement behaviors which have close relation to fatigue because of SD. The eye movement measurement can be served as a tool to continually monitor fatigue online.展开更多
Harsh plateau environment, including hypobaric hypoxia, low temperature, solar radiation and high ultraviolet intensity, exerts great influences on soldier's neuropsychological function and physiological function....Harsh plateau environment, including hypobaric hypoxia, low temperature, solar radiation and high ultraviolet intensity, exerts great influences on soldier's neuropsychological function and physiological function. China's evaluation on plateau soldier's performance mainly focuses on the valuation of physical ability.Comparatively, few attention is paid on the changes of individual neuropsychological function, which refer to the changes of soldiers' emotion, psychological activity, and cognitive function, including perception, memory, thinking ability and attention.Therefore, when setting the criterion to evaluate the performance of plateau soldiers,impacts from both neuropsychological and physical elements should be involved.展开更多
To investigate the relationship between surface electromyography and subjective assessment of muscle fatigue, 20 young male volunteers participated in the experiment of pistol holding and aiming. sE MG of the anterior...To investigate the relationship between surface electromyography and subjective assessment of muscle fatigue, 20 young male volunteers participated in the experiment of pistol holding and aiming. sE MG of the anterior deltoid was recorded during the entire process, while fatigue assessments(Borg scale) were collected every 30 s. We divided the signal into several parts and then octave band method was used to calculate mean energy of each part, an equation was derived based on the relationship between the mean energy of sE MG and Borg scale. The results showed that the degree of local muscle fatigue could be described by a cubic curve, and could be used to evaluate and monitor muscle fatigue.展开更多
The ergonomic digital design and evaluation of man-machine system is the main application fields of virtual human technology. Because of the complexity of physical person and uncertainty of fatigue generation mechanis...The ergonomic digital design and evaluation of man-machine system is the main application fields of virtual human technology. Because of the complexity of physical person and uncertainty of fatigue generation mechanism, it is difficult to express a nd evaluate the Virtual Human's fatigue state. This paper summarizes the characteristics of virtual human's fatigue evaluation, such as undeterminable, invisible, the constraint conditions can been used. Viewed from the strengths and weaknesses of preexisting models, metabolic energy expenditure model, dynamic muscle fatigue model and a model to assess fatigue at joint-level using the half-joint concept, this paper puts forward the future development trend that the combination of subjective and objective,diversificationoftheanalyzablemotion,real-timeandvisualexpression.展开更多
To establish a database of muscle strength of the Chinese people. The study sampled data of 843 Chinese young males all over the country. Back force, hand twisting force and arm force of four different exerting direct...To establish a database of muscle strength of the Chinese people. The study sampled data of 843 Chinese young males all over the country. Back force, hand twisting force and arm force of four different exerting directions(pull, push, adduction and abduction)were measured Comparisons were made between the results of this study and those from other documents. Different types of the strength were also compared. The factors of stature and weight influenced on muscle force were analyzed There are obvious difference of arm strength in four directions, which can be ordered as push, pull, adduction and abduction, the push force is the largest and the abduction force is the least The significant correlation exists between different types force. Weight has an obvious influence on one's force among above three factors. Chinese young males database is established at the first time. Results of the study can provide help for the ergonomists, the workers of occupation health and the researchers ofrehabilitation.展开更多
基金Aviation Science Foundation of Chinagrant number:20115551025
文摘To examine the effect of sleep deprivation （SD） on eye movement be- havior in flight task, four subjects who were skilled in flight simulator participated in the experiment, which were asked to perform a level flight task in a flight simulator. Eye movement data and flight performance data were measured at the following hours： 11：00, 15：00, 04：00, 11：00, 15：00. The subjects workload and fatigue were assessed with the method of national aeronautics and space administration-task load index （NASA-TLX） and rating of perceived exertion （RPE）. Eye movement indices of average pupil area, av- erage saceade amplitude and average saccade velocity decreased during the 32 h of SD and they all showed significantly change in the final SD while the index of average fixa- tion time increased in the final SD. Flight performance deteriorated during the 32 h of SD, but not significantly. The feeling of fatigue and workload reported by subjects both increased during the 32 h of SD. Daily rhythm effects on the measured indices were also found, there were a obviously change at the hour of 04：00. 32 h of SD has obvious effect on eye movement behaviors which have close relation to fatigue because of SD. The eye movement measurement can be served as a tool to continually monitor fatigue online.
文摘Harsh plateau environment, including hypobaric hypoxia, low temperature, solar radiation and high ultraviolet intensity, exerts great influences on soldier's neuropsychological function and physiological function. China's evaluation on plateau soldier's performance mainly focuses on the valuation of physical ability.Comparatively, few attention is paid on the changes of individual neuropsychological function, which refer to the changes of soldiers' emotion, psychological activity, and cognitive function, including perception, memory, thinking ability and attention.Therefore, when setting the criterion to evaluate the performance of plateau soldiers,impacts from both neuropsychological and physical elements should be involved.
基金The Opening Foundation of the Science and Technology on Human Factors Engineering Laboratory,Chinese Astronaut Research and Training Centergrant number:HF2011-K-04
文摘To investigate the relationship between surface electromyography and subjective assessment of muscle fatigue, 20 young male volunteers participated in the experiment of pistol holding and aiming. sE MG of the anterior deltoid was recorded during the entire process, while fatigue assessments(Borg scale) were collected every 30 s. We divided the signal into several parts and then octave band method was used to calculate mean energy of each part, an equation was derived based on the relationship between the mean energy of sE MG and Borg scale. The results showed that the degree of local muscle fatigue could be described by a cubic curve, and could be used to evaluate and monitor muscle fatigue.
基金the Opening Foundation of the Science and Technology on Human Factors Engineering Laboratory,Chinese Astronaut Research and Training Centergrant numder:HF2011-K-04
文摘The ergonomic digital design and evaluation of man-machine system is the main application fields of virtual human technology. Because of the complexity of physical person and uncertainty of fatigue generation mechanism, it is difficult to express a nd evaluate the Virtual Human's fatigue state. This paper summarizes the characteristics of virtual human's fatigue evaluation, such as undeterminable, invisible, the constraint conditions can been used. Viewed from the strengths and weaknesses of preexisting models, metabolic energy expenditure model, dynamic muscle fatigue model and a model to assess fatigue at joint-level using the half-joint concept, this paper puts forward the future development trend that the combination of subjective and objective,diversificationoftheanalyzablemotion,real-timeandvisualexpression.
基金Natural Science Foundation of Chinagrant number:31170895,11072021
文摘To establish a database of muscle strength of the Chinese people. The study sampled data of 843 Chinese young males all over the country. Back force, hand twisting force and arm force of four different exerting directions(pull, push, adduction and abduction)were measured Comparisons were made between the results of this study and those from other documents. Different types of the strength were also compared. The factors of stature and weight influenced on muscle force were analyzed There are obvious difference of arm strength in four directions, which can be ordered as push, pull, adduction and abduction, the push force is the largest and the abduction force is the least The significant correlation exists between different types force. Weight has an obvious influence on one's force among above three factors. Chinese young males database is established at the first time. Results of the study can provide help for the ergonomists, the workers of occupation health and the researchers ofrehabilitation.
