directional [di'rekʃənəl]

directional的基本解释

adj.

方向的

与directional相关的网络例句 [注：此内容来源于网络，仅供参考]

The tactile directional map is similar to regular directional maps in function. Yet, due to the fact that it requires specified Braille explanation and larger tactile elements, the information density on the tactile directional map is relatively lower. Consequently, a tactile directional map is normally not as delicate and not as comprehensive as a regular directional map. The purpose of this study is to examine the appropriate size of various elements on the tactile directional map and to develop a set of design principles in order to create one that better meets the need. It first explores the way the visually impaired use the tactile directional map and inquires about their views and suggestions.

一般导引地图上有指示性图示，超越文字的藩篱，能让大多数人能理解，且可简化版面的设计；然而触觉地图虽与一般地图相类似，但增加了点字说明和一些触觉元素，可是却鲜少有图像，这是由於点字和一些触觉元素的特性使然，因而使得触觉导引地图上的资讯密度相对较低，造成触觉导引地图缺乏像明眼人导引地图一样地设计完善，也没解释这麽清楚、更缺少图像化的设计，若是维持和一般导引地图相同的资讯密度，则触摸导引地图的面积会过大，超出了一般人手部可触及的范围，造成了视障者触读的不便，这都会使得资讯残缺及迷失，甚而产生一些不可知的危险状况。

In order to improve the accuracy of fingerprint directional image further, combining the advantage of the continuity of the point directional image with the advantage of the robustness of the block directional image to the noises in the fingerprint image, a novel concept on the continuously distributed directional image/field and the method to compute it in the fingerprint images are develope...

实践证明这种连续分布方向图过渡平滑、自然，既具有很好的连续性、渐变性和抗噪性，又具有极高的精确度，还兼有指纹点方向图的连续过渡性和块方向图的抗噪性优点。

A positive and negative projection method of object to be tested based on universal pattern display card includes using 3D texture to present rebuilt body data of object to be tested, calculating out directional vector array of ray outgoing point to detectors, storing said vector array into pattern display card to form directional vector texture, rotating directional vector texture and directional vector around rotary shaft to realize once of positive projection course on any projective angle, using 3D texture index technique to let virtual slab set position be not limited any more in negative projection course.

本发明属于投影探测与成像技术领域，其特点在于该方法含有以下步骤：把被测物体的重建体数据用三维纹理存储表示；预先计算射线出射点至平面探测器上个探测器之间的方向向量数组，并存储到通用图形显示卡中形成方向向量纹理；利用方向向量纹理与方向向量绕旋转轴旋转来实现任一投影角度的正投影过程的一次完成，无中间结果转存；在反投影过程中，利用三维纹理索引技术使虚拟切片组的放置位置不再受到限制。

与directional相关的网络解释 [注：此内容来源于网络，仅供参考]

Directional：指向性

若按其方向可大略区分为全向性(Omni-directional)天线和指向性(directional)天线. 全向性天线的名称说明了电磁场的辐射能量在每个方位都会一致,目前最普遍的全向性天线当属偶极(dipole)天线,绝大部分的基地台(Access Point),

Directional：定向

中国哈尔滨工业大学的物理学家透过电脑模拟,展示一种简单的级联(cascade)光子晶体结构设计,该结构具有自准直(self-collimating)的特性,能将约80%的输入能量转换成定向(directional)放射的光束,因此能有效地把光耦合到光纤、脊形波导

Directional：<平行光>

光照效果的样式Light type: 平行光(Directional):以一条直线的形式,利用鼠标按住一点进行拖动,直到效果满意为止. 全光源壹(Omni):以圆形的形式,利用鼠标单击一点进工行拖动变大变小,直到效果满意为止. 点 光(Spotlight):我们可以随便单击一点使它变形,

Directional：方向性

以偶极天线的水平面场型来看,电磁波强度在任意方向上都相等,这就是所谓的全向性(Omni-directional)辐射场型;但在垂直面场型中,电磁波强度则是在&theta; 等于90 度的方向上有最大值,是属于具有方向性(Directional)的辐射场型.

directional antenna：定向天线

(3)定向天线(Directional antenna):以非常窄的电波提供高增益. 此类天线必须仔细地对准目标,应用在点对点或点对多点网络的远端节点处. 碟型天线(Dish)和八木天线是两种常用的定向天线,很容易获得高达24dB的增益. 卫星新闻采集(SNG)时常用来提供特别事件的电视覆盖,