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In view of the eye movement data to improve the bottom-up area calculation model, the modified artificial calculation model for calculation of psychological experiments before and after pictures of a significant area, psychology experiment and computer model calculation results by comparison and analysis of the eye movement data of significant influence and the reasons of the area calculation model, for the eye movement data significantly improved computer area calculation model and provides the interpretation of the psychology. The results showed that the eye movement data improved significantly the area calculation model more in line with the human visual system characteristics. Significant area calculation model of recognition effect is improved obviously.

Vehicle interior noise is one of the harmful environmental factors, It affects the overall efficiency of the vehicle through the physiological and psychological influence on occupant. In the noise reduction design, noise source identification is the primary work of noise control. In the vehicle standing idle or low speed, the engine noise is the main noise source of vehicle. The noise of the engine can come into the passenger compartment through the engine compartment bulkhead. In this paper, one military vehicle interior noise is test in the vehicle standing idle, the spectrum characteristics of the noise are analyzed. The results show that the noise transferred to the passenger compartment is steady and continuous sound when the engine idle working. The noise pressure level is increased with the increase of engine speed. The noise frequency is mainly concentrated in the low and intermediate frequency band.

At high altitudes, in special vehicles equipped with oxygen-generating device, the fighting capacity of the crew can significantly improve. In the process of oxygen-making device development, whether oxygen flow meets the passenger demand has nagged the designer. The index is not only affect the oxygen plant energy consumption, volume and weight, the ways of oxygen inhalation, and directly affect the feasibility of oxygen generator column mounted. This paper combination of plateau environment has carried on the oxygen flow index from the high-altitude physiology angle. On the basis of respiratory physiology demand of personnel, it decided the pulmonary ventilation as oxygen flow design basis; according to the special vehicle measurement, defined the pulmonary ventilation of crew; according to the characteristics of special vehicles, with the physiological protection requirement of crew and engineering possibility, defined the oxygen supply strategy suitable; and the oxygen flow index was estimated, which meet the crew sea level, 1,500, 2,500 m altitude respiratory protection level of crew, providing reference for the further research on the performance index of the oxygen plant.

Objective To study the function of neurotransmitters and brain and to explore the mechanism of chronic brain fatigue. Methods fatigue group: 200 chronic brain fag sufferers, control group: 120 common people; compare the power and relative power of nerve, index of cerebral function by EFG. Results (1) All nerve power of fatigue group are significantly lower than the control group (P < 0.01); (2) the relative power of GABA, Glu, and NE of fatigue group are significantly lower than the control group (P < 0.05), there are no significant difference in other relative power between two groups; (3) fatigue group’s total power and index of blood vessel systolic or diastolic are significantly lower than the control group (P < 0.01), the exercise index is also significantly lower than the control group (P < 0.05), but the entropy is significantly higher than the control group (P < 0.01). Conclusion There are significant differences in power of all neurotransmitters, parts of relative power, and index of brain function between the two groups, which suggests that change of these indices may be the cause of chronic brain fag.

Purpose: To supply technical support for installing and applying crew thermal protection equipment on special vehicle. Object and Methods: Analyze and evaluate the design rationality and cooling effect of crew thermal protection equipment by performance testing, crew member physiology and psychology testing and subjective sensations surveying. Results: (1) Average temperature difference (tested person of the tested group to tested person of the contrast group): chest 1.4 °C lower, left axilla nearly the same, right axilla1 3 °C lower, chest temperature of the cooling clothes 5.2 °C lower to general clothes, and back temperature 5.8 °C lower; (2) No obvious difference between tested group and contrast group before/after trial; (3) 66.7 % of tested person in cooling clothes felt very comfortable, 33.3 % felt quite comfortable; (4) Tested group(three persons) fatigue degree recognition: One person normal, two persons quite ease. Compare group (three persons) fatigue degree recognition: two person quite tired, one person normal. Conclusion: Real vehicle testing manifest: crew thermal protection equipment has a good service effect. It excellently satisfied the requirement of the high temperature of special vehicle interior under the damp heat conditions of South China. It can significantly enhance the persistent working capability.

With the purpose to study the occurrence probability of the inattentional blindness at high altitude, inattentional blindness experiments at high altitude are carried out in this paper, and the physiological and psychological changes of subjects are monitored at the same time, such as heart rate, degree of blood oxygen saturation and so on. The results show, in the plateau of low-oxygen environment, inattentional blindness more likely happen, meanwhile, subjects physiological and mental state changed a great deal. The reason may be that narrow scope of people’s attention or severe damage to people’s short-term memory. In the vehicle visual information interface design, people’s cognitive characteristic changes in the plateau of low-oxygen environment must be considered.

In this paper, we present an approach for moving object contour tracking in video by using an improved dual-front active contour model. Dual-front active contour model is first proposed for medical image segmentation. In order to adapt it to object tracking problem, we make two improvements on the original model. First, region force of the external front is modified by restricting its support region. This modification can speed up the algorithm greatly but may result in the active contour's wrong convergence to the real object boundary when it locates in a large homogeneous region. Then, a new function called quasi-balloon force is brought into the model by modifying its active region construction method. It can not only solve the problem result from the first improvement but also make tracking more flexible. The algorithm does not need an a priori shape so it is fit for deformable object tracking. By adjusting the parameters, it can be used to track fast moving target. Since the level set method is used, the topology change of the object can be controlled automatically. And no static background of the scene is assumed which means the contour can be tracked under the condition that both the camera and the object are moving. Experimental results demonstrate its effectiveness and robustness.