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Since the first Landauer theory in 1957,theorists have attempted for 50 years to justify the drift force or electron momentum transfer assumed by Black as some electron-wind force to impart on the metal atoms and ions to move them.

自1957年第一个Landauer理论以来，理论工作者用50年试图论证飘移力，即Black假设的电子动量转移，又称电子风力，作用到金属原子和离子上，可使它们移动。

In real option pricing, it is impractical to assume the present value of expected cash flow payoff as an exact number because it is a forecast one. Generally, the number is regarded as a triangular or trapezoidal fuzzy number to give its estimated interval values and the Black-Scholes (abbreviated as B-S) formula is used to price the real option.

针对实物期权定价中预期现金流收益的现值是个预测值，而采用精确值给出不太合理的问题，分析了三角模糊数或梯形模糊数给出它的区间估计值，并利用Black-Scholes公式为之定价的方法。

The Black-Scholes options pricing model is one of the most famous equations in finance and offers a useful first approximation for prices for option contracts.

的Black - Scholes期权定价模型是在金融业中最有名的方程，并提供一个有用的为期权合约价格首次逼近。

Fonts can convey a lot of information, for example, if you would like to express "" heavyweight champion the use of the Futura font for black or Compacta, because these fonts itself looks very heavy "."

字体可以转达好众新闻，比如如果你想表达"不沉量级冠军"不离搁置Futura Black或Compacta字体，因为这些字体本身看起来不离很"不沉"。

Uncle Joe is the black sheep in the family. Instead of getting a job, all he does is drink too much, gamble away any money he gets and chase after women

a black sheep 指的是一个给他周围的人带来耻辱的人。

Geometric average; Asian option; Black-Scholes formula; Strong Path-dependent

几何平均；亚式期权； Black-Scholes公式；强路径依赖

Specially, we primary deals with the option pricing of Black-Scholes model with continuous dividend payments then get the call option and put option formulas: And the model of geometric average Asian options with fixed strike price then we get the call option formula: The relevant formulas about call option and put option,which are all identical with the classical ones.

其中，特别是对连续支付红利的欧式Black-Scholes期权定价模型求得其买权和卖权的定价公式分别为：此外，还对具有固定敲定价格的几何平均亚式期权的模型给出买权的定价公式：所得结果与用经典解法求得的定价公式完全一致。

3We obtain the analytical price formulas for vanilla, forward-start and in-progress fixed-strike and floating-strike continuous geometric average Asian options and a put-call parity under generalized Black-Scholes with time-dependent parameters by risk neutral valuation and properties of stochastic integration.

在依赖时间参数的推广的Black-Scholes模型下，利用风险中性定价及随机积分的性质，得到平凡、远期开始和进展中的固定和浮动执行价格的连续几何平均欧式亚洲期权价格的解析公式和一个平价关系。

Part of the Black Cameo Collection, this elastic headband is trimmed with a a double grosgrain and satin ribbon bow and features a baroque lucite-framed jet cameo.

Black Cameo系类产品，弹性发带，缎带和罗缎编成的蝴蝶结上镶有以树脂为边框的黑色巴克罗风格的黑玉浮雕。

We were on tour with Black Crowes-the lead singer is Mr Kate Hudson-and her mam,Goldie Hawn,came into our dressing room.

有一次我们和Black Crowes一起开演唱会，他们的主唱是 Kate Hudson，和她的另一半 Goldie Hawn走进我们的休息室。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。