Recently we did a survey in our class in order to learn about students’ ideal jobs. Here’s a report about my group members’ ideas。
Mary wants to be a fashion designer because she likes beautiful clothes and is good at drawing. Kate wants to be a gardener, she lives plants, and she wants to make the cities better. Mike would like to be a writer. He’d like to share his wonderful stories with others. Tom would like to be a cook. He’d like to cook delicious food for others. I would like to be a policeman. I want to protect the people safe。
Hopefully everyone can realize their dreams in the future。
课题:简单的线性规划
线性约束条件:关于x、y的一次不等式(或方程)组成的不等式组所表示的平面区域。
线性目标函数:目标函数为x、y的一次解析式。(目标函数:欲达到最大值或最小值所涉及的变量x、y的解析式。
线性规划问题:求线性目标函数在线性约束条件下的最大值或最小值的问题。
可行解:满足线性约束条件的解(x、y。
可行域:所有可行解组成的集合。
最优解:使目标函数取得最大值或最小值的可行解。
父母的殷切期望,亲人们的寄托,老师的期待,社会的希望,升学的压力,学习任务的繁重,为自己前途的打算……那是一条条不等式画出的线条,那斜率相差无几的线条,却是数也数不清的线条。于是构成了一个诺大的区域,线条密集得让人头皮发麻。擦去边角多余的线条,才发现围成的区域已近乎一个圆了。再也不会有棱角,再也不会有锋芒了。
我们,就是那条目标函数。我们上下反复地移动着,只为寻求那最优解。最大值是怎样去取得最优异的学习成果;最小值就是怎样寻求最有效的学习方法,最高的学习效率。
我们反复地移动着,寻找着,可那孤形的曲线让我们的寻找过程变得好艰难,却还是难以找到那个我们一直在寻找的位置。而且还是那么一个偌大的区域。也许,好不容易在可行域中找到了那个位置,可那点的坐标呢,没有坐标我们又怎么能验证它的价值呢?
在可行域里,我们生存的好辛苦,好疲惫。
也曾尝试挣脱那厚实的'线圈成的地方,去寻求外面那更广阔、更自由的空间,没有约束,没有沉重,没有疲惫。
可我们无法做到,我们注定在可行域里才会有意义。
也不知道,如果我们真的挣脱了,我们又将会是什么样。可我们明白,那样只会是遍体鳞伤。没有世外桃源,我们就只是生存在这个世界中,这个实实在在的,充满竞争的世界。
我们只是希望,哪天那直线的条数能被我们数清,我们又有了那棱角,那锋芒。我们每个人都有着不同的区域,形状的不同,约束条件的不同,而不是每个人都属于那个如出一辙的偌大的圆。那样,我们才是我们自己,不同于别人的自己,我们不必为寻找最优解的位置疲惫不堪,而我们要做的就是顺着最优解的方向一直走下去,把珍贵的时间用于对那种有意义的探索。而实际上,节省了寻找最优解的时间,我们也就找到了一种最优解。
我们是目标函数,我们有不同的形式,可以得到不同的结果,我们寻求最优的我们,只要那可行域简洁些,真的,我们能做的很好,在各个方面。因为,我们有能力,去一次次将我们自己、各方面的自己,放到那可行域中去试探,寻找最优解的位置。
数学课上,线性规划的题做得很麻烦,因为又是画图,又要找区域、确定目标函数、找最优解。
可我们不会怕麻烦,因为我们在寻求,寻求最优解……
Recently we did a survey in our class in order to learn about students’ ideal jobs. Here’s a report about my group members’ ideas.
Mary wants to be a fashion designer because she likes beautiful clothes and is good at drawing. Kate wants to be a gardener, she lives plants, and she wants to make the cities better. Mike would like to be a writer. He’d like to share his wonderful stories with others. Tom would like to be a cook. He’d like to cook delicious food for others. I would like to be a policeman. I want to protect the people safe.
Hopefully everyone can realize their dreams in the future.
Why students can't help wearing expensive things which are famous brands?
The reason why they prefer to wear expensive clothes is just for face. Some students thought the more expensive they wear, the more confident they are. Only wearing brand clothes can they become proud. Some students are afraid to looked down if they don't wear brands things. It is easy for students to compare what they wear.
As far as I am concerned, I don't agree that students pursue famous brand. Most students can't earn money by themselves. We can't waste the money to buy expensive things which are not useful. It is hard for parents to make money. Remember, the main task of the students is to study.
Everyone has his own dream. I want to be a good doctor in the future. The reason is that some doctors saved my life after I was badly hurt in a traffic accident. I was deeply impressed by their medical skils and greatly moved by their care for me. From then on, to be a doctor in the future has always been my dream.
Our dreams can’t be realized unless we make all our efforts. Therefore, the first thing I will do is to remember what my dream is. I won’t let it leave my mind, because it will help me to keep trying and fighting for what I want. What’s more, I will do my best to increase my knowledge and improve my abilities to prepare myself for an excellent doctor. Last but not least, I will never give up. Though there may be difficulties on the road to my dream, I will always feel confident and work hard.
Li Min works hard at English(李敏在英语这一科上很努力). When she came to the school, she had quite a lot of difficulties with the language.(当她刚来学校时,她在语言学习上遇到了困难) But she was not afraid of them and always tried hard to overcome them. (但是她不害怕,总是一直努力尝试去克服它们)She was active in class and did a lot of practice after class(她在课堂中积极表现,课后做大量练习). No pains, no gains(没有努力就没有收获).With great efforts she made much progress in English study.(通过她的.努力,也在英语学习上取得了很大的进步)
Li Min is modest and always ready to help others.(李敏是一个谦虚的人,她总是准备随时帮助别人) She is very strict with herself in her work and daily life.(她在工作上和日常生活里都严于律己) She sets us all a fine example.(她为我树立了一个好榜样)
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