由类比法得到的数学模型一定是正确的

答案查看网，轻松搜题/搜资源

【判断题】【消耗次数：1】

由类比法得到的数学模型一定是正确的

① 正确

② 错误

参考答案：

复制

纠错

相关题目

【单选题】关于数学模型的如下论述中正确的是（）

① 数学模型是以现实世界的特定问题为研究对象。

② 数学模型只是对实际问题的近似表示，其中包含一些简化假设。

③ 数学模型表示是某一特定问题的内在规律的数学表示，是以方程和函数关系表示的数学结构。

④ 数学模型是现实问题的真实的描述，不能做任何假设和简化。

查看完整题目与答案

【多选题】建立数学模型应（）。

① A.以已知函数关系为基础

② B.充分考虑给定条件下影响量的影响

③ C.根据经验予以筛选、合并和调整

④ D.灵敏系数必须为1

查看完整题目与答案

【多选题】数学模型表现特性有

① 确定和随机

② 静态和动态

③ 离散和连续

④ 线性和非线性

查看完整题目与答案

【判断题】建立控制系统数学模型的主要方法有解析法和实验法

① 正确

② 错误

查看完整题目与答案

【单选题】应用数学模型和公式来解决一些决策问题，即是运用数学工具、建立反映各种因素及其关系的数学模型，并通过对这种数学模型的计算和求解，选择出最佳的决策方案。

① 定性决策方法

② 定量决策方法

③ 非程序化决策

④ 不确定性决策

查看完整题目与答案

【判断题】系统框图也是控制系统的数学模型的一种形式。（）

① 正确

② 错误

查看完整题目与答案

【判断题】物理本质不同的系统，可以有相同的数学模型。

① 正确

② 错误

查看完整题目与答案

【判断题】对现实世界的一个特定对象,为了一个特定目的,根据对象特有的内在规律,在出问题分析和一些必要、合理的简化假设后,运用适当的数学工具,得到的一个数学结构就称为该特定对象的数学模型.依据上述几个基本步骤建立数学模型，这个全过程便称为数学建模。

① 正确

② 错误

查看完整题目与答案

【判断题】控制系统的构成不同，故其数学模型也不同。（）

① 正确

② 错误

查看完整题目与答案

【单选题】一般情况下，从历史数据入手，按一定的数学模型推导出预测值的预测称为（）

① 定性预测

② 定量预测

③ 确定性预测

④ 不确定性预测

查看完整题目与答案

随机题目

【多选题】 This story_____________ a very brave (勇敢的) young girl.

① is to

② is about

③ concludes

④ concerns

查看完整题目与答案

【单选题】 Computer are being used more and more____________ in the world today.

① extensively

② expensively

③ exclusively

④ exactly

查看完整题目与答案

【单选题】 Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people keep their anger inside. They can not or will not express it. This is called repressing anger. Many doctors think that repressing anger is more dangerous to a person’s health than expressing it. They say that when a person is angry, the brain gives out the same hormones (荷尔蒙) as that are produced during tense and nervous situations. They speed the heart rate and raise blood pressure, so the person feels excited and ready to act. Repressing these feelings will only make the feelings continue, and this can lead to many medical problems. To prevent these problems, these doctors suggest letting the anger out by expressing it freely. But recently some other doctors question this. They say that people who express anger repeatedly and violently become, in fact, more but not less angry. And this could cause medical problems. However, some doctors say that both repressing and expressing anger can be dangerous. They believe that those who express anger strongly may be more likely to develop heart diseases, and that those who keep their anger inside may face a greater danger of high blood pressure. Doctors say the solution is to learn how to deal with anger. The first step is to admit that you are angry and to recognize the real cause of the anger, and then to decide if the cause is serious enough to get angry about. If it is, do not express your anger while angry. Wait until your anger has cooled down, and express yourself calmly and reasonably. Doctors also say that a good way to deal with anger is to find humor in the situation that has made you angry, for laughter is much healthier than anger.According to the passage, which of the following about hormones is correct?

① Hormones will cause people to get anxious.

② Hormones will increase when one gets angry.

③ The brain produces hormones when one’s blood pressure rises.

④ The brain produces hormones when one has medical problems.

查看完整题目与答案

【单选题】 It is no good ___________ to know what you dont know.

① pretend

② to pretend

③ pretending

④ pretends

查看完整题目与答案

【单选题】 A _________ is ten years

① decade

② century

③ millennium

④ dozen

查看完整题目与答案

【单选题】 Goats are being hired to do the work of people near San Diego. The fires that occurred in Hillborbough four years ago destroyed thirty homes, most of which have been rebuilt. While people were rebuilding the homes, the grasses and bushes were growing back. The area is now so overgrown in bushes that there is again a major danger of fire.The city government put up bids to remove the bushes. The lowest bid they received was $50,000—and that was if the city provided breakfast and lunch for the workers for the six weeks it would take to clear the overgrown area. The city only wanted to give unlimited coffee and a piece of bread a day for each person. When that offer was rejected, the city asked for help on its website.A sheepherder in Montanta and a goat-keeper in San Bernardino read about the city’s plight（困境）while surfing the Web. They both offered to do the job for $25,000. The city government chose the goat-keeper because he lived closer. When he was told that the city dump（垃圾场）was overflowing , the goat-keeper said, “No problem. My goats will eat everything in your dump, except the car engines, of course.” So, for another $5,000, the city killed two birds with one stone. If all goes well, they will invite the goat-keeper and his “family” back every three years. The goat-keeper said that he would probably visit San Diego while his goats were in the dump.What are the “two birds” that the city government kills with only one stone?

① Both the sheepherder and goat-keeper will work for the city for $25,000.

② The danger of fire and providing breakfast and lunch for the work crews.

③ The danger of fire and the overflowing dump.

④ The city government can save some money and the goat-keeper has a new job.

查看完整题目与答案

【单选题】 You have to work hard if you want to __________ in your courses.

① achieve

② succeed

③ win

④ beat

查看完整题目与答案

【单选题】 I will tell you____________ you have to study biology.

① why

② which

③ what

④ where

查看完整题目与答案

【单选题】 Susan: How do you do, Mrs. White.Mrs. White: How do you do, Susan. I’m glad you can join us. __________

① Dont be shy.

② Please feel natural.

③ Make yourself at home.

④ Feel all right here.

查看完整题目与答案

【单选题】 I ___________ a short rest before we continue the work.

① produce

② publish

③ propose

④ pull

查看完整题目与答案