We develop some key algorithms of automatic fingerprint identification system ( afis ) , main contexts are as following : ( 1 ) the direction map of fingerprint image is computed accurately by the change of gray on the tangent direction and the dircection of nomal 我们的指纹识别课题组在此方面作了深入的研究，并取得了一定的成果。本文在前期算法的基础上，主要进行了以下几个方面的研究： ( 1 )考虑纹线切线方向和法线方向的灰度变化，准确地求取方向图。
The peak in the direction of the target normal is consistent with mat of predicted by the resonance absorption and another peak of hot electrons emission in the specular reflection direction is due to the multi - acceleration mechanisms . the hot electrons emission along the back - reflection direction is probably caused by the acceleration of the back - reflection laser , which is for the first time put forward by us 其中，靶法线方向的超热电子发射峰与共振吸收( res ~ eabso甲tion )机制所预言的一致;根据理论估算提出激光反射方向的超热电子发射峰是几种加速机制共同作用的结果;我们首次提出背反射激光加速超热电子的新机制，并用此机制解释了激光背反射方向产生的超热电子发射峰。
Determined by dsc . whereafter , the surface micro - morphology of both sides of tini sma thin film deposited on glass was investigated by atomic force microscope ( afm ) , and the difference of morphology between the two sides is observed . it has been shown that , in the growing surface of sputtered tini film , the trend of grain to accumulating along the normal direction like a column is clearly observed , and the grain is very loose which resulted in more microcavities , but in the surface facing to glass substrate , grain is so compact that there are hardly microcavities 通过溅射法，在玻璃衬底上淀积了tini薄膜，并在600进行了真空退火， dsc法测得其马氏体逆相变峰值温度为75 ，利用原子力显微镜，对玻璃基tini形状记忆合金薄膜的衬底面与生长面进行了表面微观形貌分析，发现：生长面晶粒呈现出沿薄膜法线方向柱状堆积的趋势，晶粒致密性差，微孔洞多；而衬底面晶粒致密，几乎没有微孔洞存在。
Graphite ) and the special viscoelasticity of polymer , interlayer exfoliation of the filler and its nanocompounding with polymers can be realized in the shearing force field of pan - milling , through the effects such as deformation , dislocation , tension - sliding and shearing exfoliation of graphite , the tension - thinning , pulverization of pp , as well as the imbedding , mixing and dispersion of graphite flakes in pp powder etc . the results show that the interlayer exfoliation of graphite and nano - compounding with pp proceeded stepwise , caused by a combination of friction , squeezing , stretching , and shearing in three - dimension during pan - milling 石墨片层的受限空间影响i一pp / yep25o复合材料中pp结晶行为，进入石墨片层间的pp分子一部分择优取向，形成沿( 040 )晶面法线方向择优生长的a一晶，另一部分相对分子质量较小、运动活性较高的pp分子则受到石墨片层的挤压和限制而转化为y -晶，在i一pp厅ep250复合材料中， y -晶相对含童达34 . 8 % 。
( 2 ) according to the forming model of the deep pull cracks , they can be divided into three classes pulled cracks - , pressed cracks and sheared cracks . ( 3 ) based on the two - dimensional and three - dimensional finite element methods . the following results can be affirmed : in the slope excavating process , the base surface will rebound in the direction of the excavating surface ' s excerior normal . the maximal displacements of the left and right bank are + 3 . 6cm and + 2 . 4cm ; the arch abutment will rebound in the direction of the river valley , the maximal displacements of the two bank are + 3 . 5cm and + 2 . 2cm ; the upstream and downstream surface will rebound in the direction of the normal direction . the maximal displacements are + 2 . 1cm and + 1 . 7cm . ( 4 ) the natural slope is stable ( 3 )通过二维及三维有限元分析得知，左右岸拱肩槽边坡在开挖过程中，开挖底面主要表现为朝开挖面外法线方向发生回弹，左右岸最大位移量分别为+ 3 . 6cm 、 + 2 . 4cm ；拱端面主要表现为向河谷方向发生侧向回弹，左右岸最大位移量分别为+ 3 . 5cm 、 + 2 . 2cm ；上下游坡面主要表现为向临空方向的回弹，左右岸最大位移量分别为+ 2 . 1cm 、 + 1 . 7cm ；开挖使岩体产生由卸荷回弹导致的倾倒拉裂现象。
The reflector can increase the neutron flux obviously and the main processes of the neutron yield in reflector are spallation reaction induced by energetic hadrons and ( n , 2n ) reaction . when the moderator height is equal to the distance between the upper part and the lower part of the split target , the total neutron flux of the split target will be higher by 20 . 1 % than that of the integral one . secondly , the high - energy neutron escaping from the target will enter into the moderator and be slowed down 得到经水慢化器慢化后，中子通量在慢化器厚度与高度方向上的分布；比较了水与液态氢的慢化能力以及中子在水、液态氢、液态甲烷这三种慢化器慢化后的能谱；在csns的靶站设计中，引出慢中子的导管不完全位于慢化器中子引出面的法线方向上，因此进一步计算了中子通量角分布。
The contacting measurement method with a double probe is put forward after the detailed analysis of the state - of - the - art measuring methods of the thickness of wall . firstly , the theory - profile generatrix is built , and then the movement curve of the track of joint center is constructed , which aims at making the joint center move along the movement curve and keep the fixed sensor touching the wall . the measuring sensor examines the line in its normal direction of the interior wall all the time , the data from the sensor is the thickness value of the wall 论文通过分析国内外变曲率回转体壁厚测量的现状,提出了双测头接触式测量方案:通过构造理论轮廓母线,建立铰链中心的运动曲线,使铰链中心始终沿运动曲线运动,以保证固定触头与传感器测头的连线始终在内壁法线方向上,从而传感器测头所得的数值即为壁厚值,该方案经模拟测试实验取得了预期效果。
Gram - schmidt method for zernike polynomials fit and singular value decomposition ( svd ) are concerned . the direction question for zernike polynomials fit is discussed and the surface error in the normal direction is deduced . to solve - the coupling and mixture of zernike polynomials fit method , rigid - body displacement is removed with coordinate transformation and then fitted with zernike polynomials 介绍了zernike拟合的gram - schmidt以及奇异值分解两种方法；论述了zernike拟合时的方向问题，计算了法线方向的面形误差；针对zernike拟合时的藕合与混淆，采用先用齐次坐标变换去除刚体位移，再用奇异值分解进行zernike拟合。
