方向

This method can connect breaks of the ridges and can dispart conglutinated ridges, but still has several shortcomings.

用方向滤波法做指纹图像二值化可以较好地连接断裂的纹线和分离粘连的纹线，并指出了当前方向滤波方法的缺点。

We dispart four small fields in the center field of the fingerprint image. Through the directions of the lines in every small field, we confirm the fingerprint type.

基于方向图分类法中将中心区域的方向图分为左上，左下，右上和右下四个子区域，根据各子区的纹线走向来确定指纹类型。

In order to increase the distinguishability of the model for integrative evaluation of economic benefits of China's paper industry,an effective and general model-PPmodel was presented.

采用基于实码的加速遗传算法寻找最优的投影方向，同时用投影方向信息研究了各因子对我国造纸工业经济效益评价的影响水平，取得了符合客观实际的分类结果。

With the advanceable, rational or functional orientation t aken as the guidelines to be chosen for the innovation, what shall be sure to doat present is to introduce and apply the contemporary psychological knowledge b ased on up-to-date biology.

以先进性、合理性、功效性等创新方向选择准则，明确了当前声乐教育创新方向应是在现代生物学基础上引入与应用当代心理学知识。

Having one direction along which double refraction of light does not take place.

单轴晶体的有一个方向的，沿此方向不发生光的双折射。

The general formulation of double refraction or internal double reflection at a single interface is analyzed in terms of Huygens'principle and surface boundary conditions.

根据惠更斯定理和边界连续条件，分析了单个界面上的双折射与全内双反射，给出了光线方向和光波法线方向的普遍公式。

With the relations between the output of the former interface and the input of the latter, double refraction and/or double internal reflection in a crystal along two and multiple successive interfaces can be calculated.

并讨论了在晶体内沿多个面的连续双折射双反射，分析了前一界面输出量和后一界面输入量之间的联系，得到多次双折射双反射后的光线方向和光波法线方向。

Then with the relations between the output of interface 1 and the input of interface 2, double refraction and/or double internal reflection in a crystal along two successive interfaces can be calculated.

在惠更斯定理的基础上，对从空气到晶体的折射、从晶体到空气的折射、近光轴入射的晶体全内反射和近光轴反射的晶体全内反射这四种单个界面上的双折射双反射情况，给出了同时适用于o光和e光的光线方向和光波法线方向的普遍公式。

The general formulation of double refraction or internal double reflection with different directions of propagation vector and wave vector in a uniaxial crystal is analyzed in terms of the Huygens principle.

并讨论了在晶体内沿多个面的连续双折射双反射，分析了前一界面输出量和后一界面输入量之间的联系，得到多次双折射双反射后的光线方向和光波法线方向。

An electric suction cleaner of the invention comprises: an electric blower for giving off sucked air; a dust collection chamber, with the roughly circular cross section thereof, in front of the sucked air of the electric blower while having a filter part having a roughly conical part for dust collecting; an intake device communicating with the dust collection chamber for sucking dust; and a suction pipe arranged within the dust collection chamber ahead of the filter part and protruding to the dust collection chamber.

要約 本发明的电动吸尘器包括：发出吸引风的电动送风机；内部具有设于电动送风机的吸引风的上游方向的、具有大致圆锥形状部的尘埃捕集用的过滤器部的、圆形截面的集尘室；与集尘室连通并吸引尘埃的吸入具；设置在过滤器部上游方向的集尘室内并朝集尘室突出的吸气管。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。