The system takes the image of the eye of the tested subject when he is gazing at a position , and processes the eye image to get the relative position of the pupil in the eye , then calculates out the gaze position where he is gazing at 该系统对被测对象观察不同注视点时的眼睛进行成像，通过图像处理得到瞳孔在眼睛中的相对位置数据，从而计算出所观察的注视点的位置。
Standard deviation in statistics , a measure of the dispersion of a frequency distribution : it is the average magnitude of deviations from the center of normal curve , calculated by squaring all the deviations , calculating their mean , then finding the square root of the mean 标准偏差：统计中，一种衡量数据组分布的分散或变化情况的数据，是偏离正态分布中间位置数据大小的平均值。
The management work data of oil - field earthquake exploration and oil - well position , which has not only data of current space position , but also entitative attribute data describing , have great capacity , traditional cad graphics describing the data plus the model database managing mode ca n ' t already adapt the modem exploration with well geography information for management work demand , so it is necessary to realize the unique management of exploration and oil - field well space data and attribute data use advanced geography information system ( gis ) technique , this thesis is based on the excellence ' s table ' s top geography information system - the maplnfo software , using the second process technique , the digital relief map and tectonic map as the base map , the earthquake exploration database as the original data , established the gis of the exploration and oil - field well in the area of the liaohe oil - field , realize visualization management , it provides a reference thereunder for the earthquake exploration deplo ying the workload and proceeding the technique design , and completed lots of practical work 油田地震勘探与油井井位管理工作数据量大，既有空间位置数据，又具有实体的属性描述数据，传统的cad制图+属性数据库管理模式已经不能适应现代勘探和井位管理工作的需要，采用先进的地理信息系统( gis )技术，实现勘探和油田井位空间数据和属性数据的统一管理是必然的趋势。本文以优秀的桌面地理信息系统mapinfo软件为开发平台，在此基础上进行二次开发，以数字化地形图、构造图为载体，以地震勘探数据库为数据源，建立了辽河油田范围内的地震勘探和油田管理信息系统，实现了数据的可视化管理，为地震勘探部署工作量、进行技术设计，提供了图形和数据的参考依据。并完成了很多实际工作。
Slz25 glass vertical drilling machine is controlled by computer , in actual operation , just put the glass on the transmission belt , input drilling position data , press the start button , the machine will automatically position itself and finish all drilling operations , and automatically stop when the work is compeled , featuring high drilling efficiency and accurate position , suitable for the processing of building glass and fumiture glass 详细说明： slz25玻璃立式钻孔机为电脑控制，操作时只需将玻璃放在传送带上，输入钻孔位置数据，启动按钮，自动定位后钻削所有孔位，完成工作后自动停机。钻孔效率很高，孔位准确，适用于建筑玻璃与家具玻璃的加工。
