可视距离

逆光条件下交通标志的可视距离研究

Research on Traffic Sign Discernible Visual Range under Backlighting Condition

LED显示屏具有亮度高，可视距离远、造价低等特点。近几年很多公共场所已用LED显示屏替代原始的广告牌、牌匾，并且很多大屏幕也由LED显示屏取代液晶显示屏。

With the characteristics of high brightness , visibility distance and low cost , many public have already used the LED display to replace original billboard and plaques .

跃进的幅度应该根据地形，可视距离，敌人出现的可能性等因此来决定。

The size of each bound should be based on the terrain , visibility , proximity of enemy threat , etc.

后者扩大了可视距离，带有多个变焦镜头以及低照度下的对比度和彩色清晰度。

The latter feature extended-distance viewing , choice of varifocal lenses , and contrast and color clarity in low light levels .

它具有可靠性高、可视距离远、使用寿命长、字型美观清晰等优点。

This device has many advantages such as high reliability , long visible distance , longlife span as well beautiful and clear words pattern etc.

分析了灾害性气象因素对道路运营安全的影响，采用设计频率方法对气象数据进行了计算分析，建立了不同运行状态下不同的可视距离、行车车距和运行车速间的数学模型。

The effects of atrocious weather factors on road operating safety were investigated and the design frequency of atrocious weather was calculated using historical weather data .

由于红色在可见光谱中波长最长，因此可视距离要比其它颜色更远，这就可以理解为什么很多文化中将红色视为危险信号。

Red symbolizes danger in many cultures , which makes sense , considering it has the longest wavelength of any color onthe visible spectrum , meaning you can see it from a greater distance than othercolors .

我们可以计算出在地球上任意地点的平均可视距离，但我们又会遇到另一个问题：为什么两个急于找到对方的人会跑到茂密的丛林里去？

We could try to calculate the averagevisibility across all parts of the Earth , but then we run into anotherquestion : Why would two people who are trying to find each other spend time ina thick jungle ?

以大量的现场试验为研究手段，在交通标志可视距离研究的基础上，探讨了交通标志的视角阈值与车速和光线条件之间的相互关系，并给出了具体量化的数值表达。

On the basis of research on visibility distance of traffic sign carried out by large numbers of driving experiments , the impact of light on traffic sign visual angle threshold in different driving speeds is discussed , then their quantitive relationships are given .

基于地上可视湿润距离的地表滴灌入渗深度估算模式研究

Estimation Model of Soil Surface Trickle Infiltration Vertical Wetting Front Based on Horizontal Visual Wetting Front

基于可视特征度量距离的图像检索

Image indexing based on distance metrics of visual features

鸟类对人为侵扰的惊飞距离与选取变量间的关系显著：体形大小、观测点可视度与惊飞距离呈显著正相关，活动高度与惊飞距离呈显著负相关，而引人注目性与惊飞距离不相关。

The analysis of bivariate correlation showed that flush distance was positively associated with body size and the visibility of observation point , but it was negatively associated with activity height .

LED显示屏作为新一代信息传播媒体工具，主要是因为它具有以下几个优点：使用寿命长、功耗较低、亮度比较高、可视角度大、可视距离远等。

The LED display screen has advantages of long service life , low power consumption , high brightness , large viewing angle , visible distance etc. And it has become a new generation of information transmission media tool .