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- Abstract: To settle the numbers of groups, the moth and features of group sampling are analysed, and its estimator is goven.Then using CauchySchwartz unequility, it seeks the best apportion with finite cost. 文摘:为了确定分类抽样的各类单位数;分析了分类抽样的抽取方法和特点;同时给出其简单估计;然后利用柯西-施瓦茨不等式推导出在给定调查费用情况下的最优分配.
- She reckoned she had cut her cost by half. 她估计她减少了一半的费用。
- She skirted round the problem of the high cost. 她避而不谈巨额费用问题。
- The cost of travel to the far east is prohibitive. 到远东旅游的费用高的令人不敢问津。
- In point of cost, we'll have to discuss it at the next meeting. 至于费用方面,我们只好留到下次会议再讨论。
- His parents balk at the cost of the guitar he want. 他想要那个吉他,但他父母看到吉他的价格却踌躇不决。
- A finite increment in a variable. 变量增量变量的有限增量
- He put the telephone bill down as a business cost. 他把电话费用作为办公费记下。
- My new car cost me a cool thousand pounds. 我的新车整整花了我1000镑。
- How much did it cost you to study abroad? 你出国深造花了多少钱?
- A good video camera will cost you a pretty penny. 一台好的摄像机要花掉你很多钱。
- A year in America will cost you no end of money. 在美国住一年要花很多的钱。
- He is determined to stay in the saddle at all cost. 他打定主意要不惜一切代价继续掌权。
- It will be to his cost if he bets on that horse. 如果他赌在那匹马上,他可就要吃亏了。
- I'm determined to attain my purpose at any cost. 我决心不惜任何代价达到目的。
- The bumbling of our salesman cost us the account. 推销员所犯的错误使我们失去了那位客户。
- The cost will be stopped out of your salary. 费用将从你的工资中扣除。
- The full cost of the holiday fell upon me. 度假的全部费用都甩给我支付。
- The policy will put on the cost of living. 这些政策将使生活费上涨。
- Castles in the air cost a vast deal to keep up. 空中楼阁,要有一大笔费用来维持。