查询词典 F

Suppose Y is an absolutely continuous random variable symmetric about 0 with probability density function f and cumulative distribution function F.

假设Y是一绝对连续且对称於0的随机变数，其机率密度函数为f，而分布函数为F。

It was found that for large aperture ratios (the ratio of focal length of the primary to its aperture, as the f-ratio in modern cameras for instance), f/10 or more, the difference between spherical and paraboloidal mirrors was negligible in the performance of the telescope.

结果发现，大口径的比例（比例焦距初级到其孔径，由于架F -比率在现代相机举例来说）， f/10或更长时间，之间的差别球面和抛物面反射镜是微不足道的，在表现望远镜。

The FCT-150, a 6 fluorite triplet apochromat, yields exquisite images at f/7 or even f/5 with its optional focal reducer.

高桥FCT-150，采用6英寸的萤石三片APO物镜，能在f/7时产生高度细节的图象，如果采用减焦镜，能在f/5时实现相同效果。

His book is mathematically demanding, but it boils down to a few key concepts: there is an optimal f for every trade; if you bet less, your risk decreases arithmetically while profit decreases geometrically; if you keep betting more than the optimal f, you are guaranteed to go broke.

他的书用了很多数学计算，但最终总结为以下几点：每笔交易都有完美的 f；如果你赌的少，风险是数字式的减少而利润是几何级的减少；如果你投入的比最完美的 f 多，你肯定会破产。

The "Fantasia in F Minor," the "Barcarolle," the "Polonaise Fantasia,""Ballade in A Flat Major,""Ballade in F Minor," and "Sonata in B Minor" were all products of the relaxed time Chopin enjoyed in the country.

F小调幻想曲》，《威尼斯船歌》，《幻想波罗涅滋舞曲》，《降A大调叙事曲》，《F小调叙事曲》，《B小调奏鸣曲》等都是在南部疗养时创作的。

The "Fantasia in F Minor," the "Barcarolle," the "Polonaise Fantasia,""Ballade in A Flat Major,""Ballade in F Minor,""Sonata in B Minor" were all products of the relaxed time Chopin enjoyed in the country.

F小调幻想曲》，《威尼斯船歌》，《幻想波罗涅滋舞曲》，《降A大调叙事曲》，《F小调叙事曲》，《B小调奏鸣曲》等都是在南部疗养时创作的。

Basanite and tephrite from Mt. Crater, Cape Bird and southern bank of Bonney Lake are considered as a major result of partial melting of equilibrium in the mantle, fusibility f=1. 5-7%, mantle reservior are enriched in LREE and Yb, and latite from Cape Rodeys and Cape Evens as a results of magmatic fractional crystallization, crystallinity F=58. 09-70.72%, its primary magama is almost the same as basanite in study area.

博尼湖南岸、克雷克特山和鸟角碧玄岩是地幔平衡部分熔融作用的产物，地幔部分熔融度f为1.5-7％，地幔源区为轻稀土富集型，并富集重稀土元素Yb；罗德角和伊万思角安粗岩是岩浆分离结晶作用的产物，结晶度F为58.09-70.72％，伊万思角高于罗德角，它们的母岩浆相当于本区的碧玄岩。

Provides for the pitch d, f, a, c, and f-line painted red, c painted yellow line (later to become Zhonggao Yin Staff and the origin of the bass clef). The 13th century was the first use of 5 lines, to become the predecessor of Staff. 16th century and increase the line to make the pitch more complete records.

规定音高为d、f、a、c，并将f线画成红色，c线画成黄色（后成为五线谱中高音及低音谱号的起源）。13世纪有人使用第5根线，成为五线谱的前身。16世纪又有加线的办法，使音高的记载更完备。

Populations inhibitory effect of two kinds of bitter almond oil against Sitophilus zeamais Mots showed that the populations inhibitory effect of F1 and F′is decreased with the decrease of concentration, the populations inhibitory rate of F1 and F′is between 30% and 100%, 29.39% and 58.19% respectively.

种群抑制活性结果表明苦杏仁精油对玉米象F1代以及F′代的种群抑制活性随着处理浓度的降低而逐渐降低，两种处理的苦杏仁精油对玉米象F1代的种群抑制率范围在30%～100%之间，对F′代的种群抑制率范围在29.39%-58.19%之间。

NA, or the amount of contact some of the macro (such as the Faraday constant F, gas constant R, etc.) and micro-volume (such as the elementary charge e, Boltzmann constant k, etc.) of the relationship between a fundamental constant: F = NAe, R = NAk, etc..

NA还是联系某些宏观量（如法拉第常量F，气体常量R等）与微观量（如基本电荷e，玻耳兹曼常量k等）之间关系的一个基本常量：F＝NAe，R＝NAk等。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。