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For the case of two products, we show that the objective function is concave and submodular, and obtain the optimal condition for the order quantities.

接着，我们从最优采购量、销售商的最优期望收益值及对顾客的服务水平等方面对销售商采用替代策略和不采用替代策略的两种情况进行比较，证明了销售商采用替代策略可以提高其经济效益及对顾客的服务水平。

By using the position information of concave vertices, a new algorithm for finding the kernel of a simple polygon was proposed,which could automatically select concave vertex to clip against polygon to obtain the kernel.

利用凹顶点间的位置信息，提出一种自动选择凹顶点来裁剪多边形的新求核算法。

Everything that is certain, in his natural experiencing and thinking life, he therefore subjects to methodical criticism with respect to the conceivability of a doubt about it; and, by excluding everything that leaves open any possibility of doubt, he seeks to obtain a stock of things that are absolutely evident.

在其自然的经验生活和在思生活中的任何确定的东西，他都进行方法上的批评——看是否可设想一个怀疑；通过排除向怀疑的可能情况开放的所有东西，他试图获得一个绝对明证之东西的谱系。

If only we could obtain pure samples of the toxins, our researchers could concoct an antidote that would save countless lives.

只要我们能获得这些毒素的纯净样品，我们的研究者就能开发出相应的抗剂，来拯救无数的生命。

The Concord Grapes are the best, if it is possible to obtain them.

如果你能买到的话，康科德葡萄为最佳。

Through these tests we understand the rule of stress state and fracture regularities of the orifice structure before and after cracking of concrete and obtain a large number of test data They provide basis for establishing numerical model and design method.

通过试验，得到了孔口结构在混凝土开裂前后的受力状态和破坏规律，为建立数值模型和配筋方法提供了依据。

Dismissing then those pretty feminine phrases, which the men condescendingly use to soften our slavish dependence, and despising that weak elegancy of mind, exquisite sensibility, and sweet docility of manners, supposed to be the sexual characteristics of the weaker vessel, I wish to show that elegance is inferior to virtue, that the first object of laudable ambition is to obtain a character as a human being, regardless of the distinction of sex; and that secondary views should be brought to this simple touchstone.

于是我拒绝男人们为屈尊安抚我们奴性的依赖而使用的那些温情脉脉的言辞，我不屑那种优雅却乏力的头脑、玲珑剔透的心窍，还有温和柔顺的仪态，这些都应是弱者的性征。我希望让人看清，优雅不如美德；而值得赞美的理想，其首要目标是实现人的特征，而不论其男女；其次的观点都应以此为试金石，加以鉴别。

Weapply the kernel methods of regression functions and conditional density functions to obtain aseries ofβas the estimators ofβ.

回归函数核估计方法中，又分别提出了在选定连续样本点和离散样本点时的两种非参数估计模型，并对这两种模型做了详细的阐述。

We apply the kernel methods of regression functions and conditional density functions to obtain a series of as the estimators of . Then using Monte Carlo Analysis method , we can get the optimal choice of the unknown parametric that is . Examples illustrate the models and will show this estimation is effective.

应用回归函数核估计和条件密度函数的核估计方法估计未知量，将得到的一组估计值用Monte Carlo Analysis方法处理便得到最优的，并通过算例模拟讨论以上估计方法的优劣。

In mathematical that is to say,after obtaining the sampleχ,we may obtain the conditional distribution Hwhen X=χ.

在传统的Bayes估计中，参数λ的先验分布都是已知的，但有时候我们不一定能得到λ的精确的先验分布，于是就产生了新的Bayes估计方法，比如E Bayes估计和多层Bayes估计。

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。