Thursday, March 31, 2011
Thursday, March 17, 2011
什么是幸福
什么叫幸福?大概没有人能说得很准确,经常与快乐混为一谈。几千年来统治者会告诉民众什么是快乐而不告诉什么是幸福。所谓幸福就是他生活的这个环境能够长期给他带来可延续性的安全感产生的一种无忧无虑的快乐感觉。那么,现在你有吗?
---戴三个表
---戴三个表
Sunday, March 13, 2011
Thursday, March 10, 2011
What is Glass?
The glass is everywhere, and it seems that we all know that shinny, transparent thing.
But what is the glass, chemically?
1. Materials Classification
Generally, the industry materials could be classified as:
2. The characteristics of glass
The amorphous solid does NOT have a melting point, does NOT have a regular shape.
Crystals have long-range order structure, when it reaches the melting point, it requires energy to break its long-range order structure, to reach a state with irregular structures. As you can see from the figure on the left, there is a gap at melting point. The gap represents that the energy that was used to break the structure.
For non-crystals, the melting process is shown in the figure on the right. There is no melting point. There is only a so called glass transition temperature. Before the glass transition temperature, the non-crystal behaves the same with crystals. While after the glass transition temperature, the non-crystal converts to a rubber-like state directly, without a gap with heat. Because non-crystal does not have a long range order structure, so there is NOT energy required to break its structure to reach the irregular structure. In other words, the structure has always been irregular, there is not change before and after the glass transition temperature. So this behavior of non-crystals around the glass transition temperature is called glass transition behavior.
But what is the glass, chemically?
1. Materials Classification
![]() |
| Materials classification |
- Metals
- Polymers
- Ceramics & glasses
- Composites
2. The characteristics of glass
![]() |
| Difference between crystal and glass structure |
- Glass is amorphous
The amorphous solid does NOT have a melting point, does NOT have a regular shape.
- Glass has the glass-transition behavior
Crystals have long-range order structure, when it reaches the melting point, it requires energy to break its long-range order structure, to reach a state with irregular structures. As you can see from the figure on the left, there is a gap at melting point. The gap represents that the energy that was used to break the structure.
For non-crystals, the melting process is shown in the figure on the right. There is no melting point. There is only a so called glass transition temperature. Before the glass transition temperature, the non-crystal behaves the same with crystals. While after the glass transition temperature, the non-crystal converts to a rubber-like state directly, without a gap with heat. Because non-crystal does not have a long range order structure, so there is NOT energy required to break its structure to reach the irregular structure. In other words, the structure has always been irregular, there is not change before and after the glass transition temperature. So this behavior of non-crystals around the glass transition temperature is called glass transition behavior.
Google Tips
符号:
1. 引号 ""
把多个字或词用引号括起来,是告诉google“我要找包含与当前排序一模一样的字符串的文章”。
2. 星号 *
星号是通配符,可以代替任何字符,可以用作模糊搜索。例如搜“怎样打* 球”,google就会给出包含各种不同球类的打法的文章。
3. 减号 -
减号很容易理解,是告诉google“我不想看到包含下列字符的文章”。例如搜“怎样打*球 -篮 -乒乓 -台”,所有包含篮球、乒乓球、台球的网页都被过滤掉了。
4. 加号 +
Google通常会忽略一些词,例如and, or, what, how, why... 这些单词被google理解为可忽略的单词。如果你不想某些词被忽略掉,应该在这个词的前面加上一个“+”号。
5. 波浪号 ~
波浪号的主要功能是近似词搜索。在想要搜索的词前面加上波浪号,google就回返回包含该词以及其近义词的页面。例如:搜索 ~movie,google不仅会给出包含movie的页面,还会给出包含film,DVD,video,cinema的页面。
参数:
1. Site
Site的意思是只在限定的网站内搜索。例如:地震 site:sina.com,就是只在新浪内搜索。
2. Filetype
Filetype是我最常用的参数,用来限定搜索文档的格式。例如:how to search filetype:pdf, 则返回的结果都是pdf格式的。
3. Related
如果你喜欢某个网站,可以用related来找出更多和它相似的网站。例如你喜欢Youtube.com, 你就可以搜索related:http://www.youtube.com, google就会列出其它你可能会喜欢的网站。
注意:参数和冒号之间没有空格,冒号和冒号之后的关键词之间也不能加空格!
Note:
1. Google对大小写不敏感;
2. 所有的符号应尽量用英文输入法输入,因为有时候google不识别汉语输入法下的符号;
3. Google的搜索技巧还有很多,本文列出的只是常用的一些。
References:
1. Google搜索从入门到精通;
2. 十大高明的Google搜索技巧。
1. 引号 ""
把多个字或词用引号括起来,是告诉google“我要找包含与当前排序一模一样的字符串的文章”。2. 星号 *
星号是通配符,可以代替任何字符,可以用作模糊搜索。例如搜“怎样打* 球”,google就会给出包含各种不同球类的打法的文章。
3. 减号 -
减号很容易理解,是告诉google“我不想看到包含下列字符的文章”。例如搜“怎样打*球 -篮 -乒乓 -台”,所有包含篮球、乒乓球、台球的网页都被过滤掉了。
4. 加号 +
Google通常会忽略一些词,例如and, or, what, how, why... 这些单词被google理解为可忽略的单词。如果你不想某些词被忽略掉,应该在这个词的前面加上一个“+”号。
5. 波浪号 ~
波浪号的主要功能是近似词搜索。在想要搜索的词前面加上波浪号,google就回返回包含该词以及其近义词的页面。例如:搜索 ~movie,google不仅会给出包含movie的页面,还会给出包含film,DVD,video,cinema的页面。
参数:
1. Site
Site的意思是只在限定的网站内搜索。例如:地震 site:sina.com,就是只在新浪内搜索。
2. Filetype
Filetype是我最常用的参数,用来限定搜索文档的格式。例如:how to search filetype:pdf, 则返回的结果都是pdf格式的。
3. Related
如果你喜欢某个网站,可以用related来找出更多和它相似的网站。例如你喜欢Youtube.com, 你就可以搜索related:http://www.youtube.com, google就会列出其它你可能会喜欢的网站。
注意:参数和冒号之间没有空格,冒号和冒号之后的关键词之间也不能加空格!
Note:
1. Google对大小写不敏感;
2. 所有的符号应尽量用英文输入法输入,因为有时候google不识别汉语输入法下的符号;
3. Google的搜索技巧还有很多,本文列出的只是常用的一些。
References:
1. Google搜索从入门到精通;
2. 十大高明的Google搜索技巧。
Wednesday, March 2, 2011
2nd Interview
Company: Corning, Inc.
Position: Manufacturing Engineer
Interview Time: March 2, 2011, Wednesday, 9:00-9:30 am.
Main Questions:
1. How do you end up here?
2. Thesis Work statement, why choose borate glass to improve silver level? how to improve mechanical property?
3. Classes: which is Favorite and Most tough one, why? How to apply courses in thesis?
4. Transparent Ceramics: structures.
5. Exposure to manufacturing plant.
6. What position do you think fit?
教训:
1. 简历上的每个细节问题都要准备好,如果不能准备好,就不要放到简历上。
2. 面试期间要放松,声音洪亮,面带微笑。
3. 答案简洁,切中要害。
Position: Manufacturing Engineer
Interview Time: March 2, 2011, Wednesday, 9:00-9:30 am.
Main Questions:
1. How do you end up here?
2. Thesis Work statement, why choose borate glass to improve silver level? how to improve mechanical property?
3. Classes: which is Favorite and Most tough one, why? How to apply courses in thesis?
4. Transparent Ceramics: structures.
5. Exposure to manufacturing plant.
6. What position do you think fit?
教训:
1. 简历上的每个细节问题都要准备好,如果不能准备好,就不要放到简历上。
2. 面试期间要放松,声音洪亮,面带微笑。
3. 答案简洁,切中要害。
Tuesday, March 1, 2011
Great Teams
Subscribe to:
Comments (Atom)



