何毓琦的个人博客分享 http://blog.sciencenet.cn/u/何毓琦 哈佛(1961-2001) 清华(2001-date)

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Private Equity Funds in a Democracy
2023-8-8 20:54
By chance I learned something new on National Public Radio yesterday about finance on the subject of Private Equity Fund (PEF). This is my takeaway: PEF are pool of money assembled by a small group of people that manage and invest this pool of money for the participant (or share holders). In th ...
个人分类: 生活点滴|1717 次阅读|没有评论
Google and Wikipedia
2023-8-7 20:32
I was trying to watch two old movies simultaneously on TV last night (one, The American President , I have seen many times over decades but want to re-live the expereince since it was one of my favorite, the other, Grantorino , I have not seen before).by swtiching back and forth between two ch ...
个人分类: 生活点滴|1728 次阅读|没有评论
Guest Blog by William MS Lee
2023-8-1 18:39
William (Billy) MS Lee is the first friend I made when I arrived in the United States in 1950. We were initiated into the same Chinese Student Fraternity, FF, in 1951. There after we maintain contact over the next 70+ years as our friendship remain s meaningful in our ...
个人分类: 生活点滴|1666 次阅读|没有评论
The third place
热度 1 2023-7-27 20:07
Social and medical professions have long known that human being is a social animal. Except for a very small percent of the human spcies, Long term isolation and solitude are not healthy for the mental and physical survival of a human being. On the other hand, for most of the population, we spent so ...
个人分类: 生活点滴|1884 次阅读|3 个评论 热度 1
Accessing links in my old blogs
2023-7-19 23:57
I have often in the past gave links to worth while reference in my blog articles. However, with the passage of time, those links no longer works. One must do some extra wrok in order to reach the linked content. Let me give an example. I wrote an blog article about the unsung heroines of the Scienc ...
个人分类: S and T|1725 次阅读|没有评论
A clever energy solution
2023-7-15 19:33
I heard the other night on NPR (National Public Radio in the US) a clever solution for our energy problem. This is how it goes: Solar energy farm for electricity supply are developing raqpidly due to declining cost. However, electric energy demand are more intense during evening/night when pe ...
个人分类: S and T|2094 次阅读|没有评论
More about GPT
热度 2 2023-6-25 10:28
I did a bit moreresearch about GPT and learned that GPT is just a language model. It merely predicts what is the more likely next word based on its vast data base and the previous word of the text No reasoning ability were built into it. This explains some of its behavior t ...
个人分类: S and T|2495 次阅读|3 个评论 热度 2
More about our retirement community living
2023-6-23 04:27
Yet another shout out about the Brookhaven Retirement Community in Lexington, MA Four days ago, my wife Sophia had an episode of vertigo with symptoms of dizziness and vomiting (don't be influenced by the well-known movie of the same name. It does not mean fear of heights). We f ...
个人分类: 生活点滴|1857 次阅读|没有评论
My first experience of using ChatGPT
热度 2 2023-6-20 19:30
By now I believe most reader are aware of the AI software ChatGPT which seems almost intelligent. Here are my experience in using the free version of chat GPT for the first time. Recorded below are my four questions asking ChatGPT folr answers/articles about optimal control and Yu-Chi Ho – my life ...
个人分类: S and T|7838 次阅读|6 个评论 热度 2
Two Basic Ideas of Control Theory That Anyone Can Understand
2023-5-31 04:25
Two Basic Ideas of Control Theory That Anyone Can Understand 1. Averaging Out The Noise =Kalman filter and other estimation schemes Suppose you have the situation: ith Measurement = unknown constant + ith noise, i=1,2,3, . . . How do we go about estimating the unknow ...
个人分类: S and T|2000 次阅读|没有评论

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