在此基础上，提出了更好的满足这些性能的小指数点积核函数，并将应用到主分量分析中。

Base on these, we propose a kernel function include fractional inner-product model which is better fulfill these properties, and apply it to kernel principle component analysis.

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合约乘数与标的指数点位决定了股指期货的合约价值，对投资者的交易风险起到关键性的作用。

Contract multiplier and the underlying index point determine the value of stock index futures contracts, and play a key role on transaction risk to investors.

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因为投资者不能直接购买或出售指数，指数期货和期权合约就采取给每个指数点规定一定的货币价值的方式进行现金结算。

Because an investor cannot directly buy or sell an index, index futures and options contracts are cash settled by allocating a dollar amount to each index point.

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