Pearls of Wisdom_ A Harvest of Quotations from All Ages by Jerome Angel and Walter D. Glanze

The wise don’t expect to find life worth living; they make it that way.

Anonymous


Each day should be passed as though it were our last.

Publilius Syrus (ca. 50 B.C.)


Everyone is ignorant, only on different subjects.

Will Rogers


Defer not till tomorrow to be wise, Tomorrow’s sun to thee may never rise.

William Congreve


Losing an illusion makes you wiser than finding a truth.

Ludwig Borne


Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense.

Buddha (6th century B. C.)


We are more often frightened than hurt; and we suffer more from imagination than from reality.

Lucius Annaeus Seneca
(1st century A.D.)


A person who doesn’t know but knows that he doesn’t know is a student; teach him. A person who knows but who doesn’t know that he knows is asleep; awaken him. But a person who knows and knows that he knows is wise; follow him.

Old Asian proverb


Don’t be angry that you cannot make others as you wish them to be, because you cannot make yourself as you wish to be.

Thomas a Kempis (15th century)


The limits of my language mean the limits of my world.

Ludwig Wittgenstein


Nothing is worth more than this day.

Johann Wolfgang von Goethe


The way to love anything is to realize that it may be lost.

G. K. Chesterton


Nobody can contribute to the best of humanity who does not make the best out of himself.

Johann Gottfried Herder


Facing it—always facing it—that’s the way to get through. Face it!

Joseph Conrad


Whoever makes the fewest people uneasy is the best-bred man in the group.

Jonathan Swift


A man is rich in proportion to the things he can afford to let alone.

Henry David Thoreau


You think your pain and your heartbreak are unprecedented in the history of the world, but then you read. It was books that taught me that the things that tormented me most were the very things that connected me with all the people who were alive, or who had ever been alive.

James Baldwin


Silence is golden when you can’t think of a good answer.

Anonymous


Explanation given by a pupil for not joining in discussion: "I think I’ll learn more by listening. Anything I would say I already know. "

Quoted by The Christian Science Monitor


There’s only one success—to be able to spend your life in your own way.

Christopher Morley


The absence of alternatives clears the mind marvelously.

Henry Kissinger


Always do right. This will gratify some people, and astonish the rest.

Mark Twain


The most important words we’ll ever utter are those words we say to ourselves, about ourselves, when we’re by ourselves.

Al Walker


I honestly think it is better to be a failure at something you love than to be a success at something you hate.

George Bums


As a rule, I always look for what others ignore.

Marshall McLuhan


See how fleeting and trifling is the condition of humans; yesterday an embryo, tomorrow a mummy or ashes. So for the tiny sliver of time that you are given, live rationally, and depart from life cheerfully, the way the ripe olive falls, praising the season that brought it forth and the tree that nurtured it.

Marcus Aurelius (2nd century A. D.)


I think the years I have spent in prison have been the most formative and important in my life because of the discipline, the sensations, but chiefly the opportunity to think clearly, to try to understand things.

Jawaharlal Nehru


A man’s rootage is more important than his leafage.

Woodrow Wilson


No man is good enough to govern another man without that other man’s consent.

Abraham Lincoln


I am a human being: nothing human is alien to me.

Terence (2nd century B. C.)


Every person bears the whole stamp of the human condition.

Michel Eyquem de Montaigne
(16th century)


Few blame themselves until they have exhausted all other possibilities.

Anonymous


If you would be pungent, be brief; for it is with words as with sunbeams. The more they are condensed, the deeper they burn.

Robert Southey


Even the highest towers begin from the ground. - Chinese saying

【四旋翼无人机】具备螺旋桨倾斜机构的全驱动四旋翼无人机:建模与控制研究(Matlab代码、Simulink仿真实现)内容概要:本文围绕具备螺旋桨倾斜机构的全驱动四旋翼无人机展开研究,重点探讨其系统建模与控制策略,结合Matlab代码与Simulink仿真实现。文章详细分析了无人机的动力学模型,特别是引入螺旋桨倾斜机构后带来的全驱动特性,使其在姿态与位置控制上具备更强的机动性与自由度。研究涵盖了非线性系统建模、控制器设计(如PID、MPC、非线性控制等)、仿真验证及动态响应分析,旨在提升无人机在复杂环境下的稳定性和控制精度。同时,文中提供的Matlab/Simulink资源便于读者复现实验并进一步优化控制算法。; 适合人群:具备一定控制理论基础和Matlab/Simulink仿真经验的研究生、科研人员及无人机控制系统开发工程师,尤其适合从事飞行器建模与先进控制算法研究的专业人员。; 使用场景及目标:①用于全驱动四旋翼无人机的动力学建模与仿真平台搭建;②研究先进控制算法(如模型预测控制、非线性控制)在无人机系统中的应用;③支持科研论文复现、课程设计或毕业课题开发,推动无人机高机动控制技术的研究进展。; 阅读建议:建议读者结合文档提供的Matlab代码与Simulink模型,逐步实现建模与控制算法,重点关注坐标系定义、力矩分配逻辑及控制闭环的设计细节,同时可通过修改参数和添加扰动来验证系统的鲁棒性与适应性。
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