英 [ˈef nʌmbə(r)]
焦距值
光圈数
f-number //
→see alsoT-number
the ratio of the focal length to the diameter of a (camera) lens system
同义词: focal ratio / stop number / speed
公民笔记工作坊(7)-填写公民笔记.JPG 的 EXIF 资讯 ... 曝光时间 (ExposureTime) 有效F值 (FNumber) 曝光软体 (ExposureProgram) ...
...求深度; 标定; 光圈指数; 深度估计 [gap=1071]Key words:computer vision; depth-from-defocus(DFD); calibration; F number; depth estimation ...
... 几何螺距比 geometric pitch ratio; geometricpitch ratio 焦距比数 f number; f-number 螺距比(螺旋桨) pitch ratio ...
The elapsed time for completing the task becomes a function of the partition size f(1,000,000) versus a function of the total number of records to process f(100,000,000).
完成这项任务所耗的时间变成为分区大小的函数 f(1,000,000),而不再是要处理的总记录数的函数 f(100,000,000)。
Sequence numbers that include other than hexadecimal number values (0-9, A-F)
包含比 16 进制数值 (0-9, A-F) 更多内容的序列号
The -f option sets the maximum number of files, rounded to the nearest 16, for the cache directory.
f选项设置高速缓存目录的最大文件数目,按16进制舍入。
So, for the most part any time we talk about or draw pointers an arrow suffices, which really 71 in there is a number like 71, which is the literal byte that the F is actually in in RAM, but frankly who cares?
所以,每次我们讨论,或者用箭头表示指针,在指针里面有一个数字,如,那是F在RAM中的字节,但是谁在乎它呢?
计算机科学课程节选 : 哈佛公开课
So path number 1 went from i, f let's call this path up here. went to f, and this is how much energy change there was.
从i出发,经过路径1到达,能量的变化是这么多。
热力学与动力学课程节选 : 麻省理工公开课
And, that gives you a number for the fluorine, minus 0.29. Now, if you do the same for the hydrogen, you'll come up with the same number.
然后给出F的数字,负的0。29,如果同样的用H来计算,你会得到一样的答案。
固态化学导论课程节选 : 麻省理工公开课
Without an adequate number of F-22s, U.S. pilots could have a tough time matching the performance of their Chinese counterparts in a future struggle for control of the Pacific.
FORBES: Inside Pentagon, Growing Alarm Over China's Military Prowess
Although the number of F-22 fighters was capped at 187, the Air Force would increase its long-range strike capabilities by 50 percent and the penetrating component of long-range strike by a factor of five by 2025.
The Navy insists that it supports the plan of record for the Lockheed Martin plane, but it has already restructured the program once and now is studying whether the number of F-35s in carrier air wings should be cut due to cost constraints.
FORBES: Outcome Of Three Programs Will Drive Defense Sector Consolidation