煤炭资源；采矿权；便利收益；双因素模型。
Coal resources; Mining rights; Convenience yield; Two-factor model.
在考虑商品的便利收益情况下，探讨了商品互换及其期权的定价。对价格是随机的情形建立了单因素模型；
This paper explores the pricing of commodity swaps and options on commodity swaps in the presence of convenience yields.
第二个模型称为双因子模型，它是在单因子模型的基础上加入了新的因子变量—便利收益率，并且假定便利收益率服从带有均值反转特性的O—U过程。
The first model is a simple one-factor model in which the logarithm of the spot price of the commodity is assumed to follow o-u process which has a mean reverting character.
这样做的成本几乎为零，而潜在的收益和便利却很多。
The cost to do so is vanishingly low, and the potential benefits and convenience are quite high.
在构建查询时，它为终端用户所带来的便利是：他们使用数据仓库越多，获得的业务收益也就越大。
The simpler it is for end users to build a query, the more they will use your data warehouse, and the more business benefit it will provide.
当然，除了提供便利之外，自动售货机还能带来商业收益。
Of course, there is a business benefit to the vending machines.
便利的比较方式是看两种资产的收益率。
The conventional way of comparing the two is to look at the yields.
对于付费应用和嵌入应用的广告没有便利的收益统计/分享机制，也不能通过销售原生API的特性来获取收益
Can't use convenient revenue collection/sharing mechanisms available for paid apps and for in-app advertising and up selling features found in native APIs
对于付费应用和嵌入应用的广告没有便利的收益统计/分享机制，也不能通过销售原生API的特性来获取收益
Can't use convenient revenue collection/sharing mechanisms available for paid apps and for in-app advertising and up selling features found in native APIs
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