Join us

It is the first time that I put on a post to say “Hey! Join us, if you are interested in.”

We are doing amazing research here with incredible enthusiasm and broad interests.

There are tons of reasons that people choose to do research; it could be a hobby, or to make a living, or any reason you name it, but my favourite reason is always that you love it. If you love your job, then you will do it with passion and happiness. 996 is never a problem only if you love it. (Well, it doesn’t mean 996 in our team…I never advocate that. See the photo, people played badminton; and we should do it more later on.)

My interests include (but not limited to)

1. Impact of electricity on clay minerals

By applying electric voltage on clay minerals, we look at the variation of its mineral structure and engineering behaviours. This could be a scientific research on clay mineral level (chemical & micro level); it could also be linked to potential engineering application in the area of geotechnical and geoenvironmental engineering.

2. Soil remediation and ground water treatment

This is a research area on removal of pollutants from contaminated soil or protection of ground water. This research topic can be linked to EK technique as well. And another possibility is to use Fe-rich clay minerals as redox materials for ground water treatment.

3. Dewatering and consolidation

This topic is about removal of water from very fine-grained soil, like sludge, slurry, clay, etc. These kinds of materials have very low hydraulic conductivity, but electro-osmosis can be an effective method for dewatering and consolidation of them. We are looking at the challenges of this EO technique in large scale of application.

4. Geosynthetics

We are interested in application of geosynthetics.

1) Reinforcement, which is a very popular application for decades and lots of people from academy and industry are doing it.

2) Filtration and drainage. This topic is related to dewatering and consolidation. One of the special issues that we are especially interested in is the clogging problem of geotextiles. There are lot of things to do, include mechanism of clogging, update of manufacturing and design code, invention of novel types of geotextiles.

3) One more thing about geosynthetics, which is special for our research is EKG. This novel material presents a new category of geosynthetic and I’ve been staying in this topic for over decade.

5. Unsaturated soil, constitutive model and numerical modelling

We are carrying out this research partially also because of EK technique. When applying EK technique, it is related to unsaturated soil and suction. Therefore, we’ve been developing completely new constitutive model and trying to apply it in suction measurement, EK design and also trying to develop code for numerical modelling and software for EK design.

6. Mining, tailing, liquefaction, etc.

More researches that are related to my basic interests previously mentioned are being explored, we will see more ideas and fantastic work coming up.

So…welcome to join us…

And also, any collaboration is welcome.

Looking forward to hearing from you

Yan-feng Zhuang (zhuang@tsinghua.edu.cn)

EK & RSK

The presentation attached at the end of this post was from Colin Jones.
(Refresh a few more times if the pptx is not shown properly. Either Google Doc viewer or Microsoft office viewer has some problems in some special zones of the Internet.)
Some cases shown in the presentation are from us. It is an interesting and overlapping area to be explored and we have been in this area for more than 20 years. More and more novel and interesting topics in this area have been discovered and we keep on widen their application potential in different engineering areas.

PS: there was a news that the EK Co. was merged to the RSK.
I went back several times to the EU but not to the UK again and it has been around 15 years.
Hope to travel again when the pandemic ends.

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图书馆停电30秒

隔着豆浆的热气,我问他,去年的这个时候,我许愿之后,你在想什么。。。 我带着哭腔问他,是在担心她因为图书馆断电害怕,还是希望以后年年都能陪我过生日。。。 我哭出声的时候我才知道自己有多介意去年的这一刻他心的游离。

我没有同门吗?我每周不开组会吗?我们没有组会约饭吗?我不会因为共同负责课题和我的同门接触频繁吗?
可是我每周组会聚餐从来都是三个人,同门的另一个女生去不了,我和男生就不会一起吃饭。我们也曾因为共同负责一个课题单独留在课后讨论,也会因为讨论时间太长一起去食堂吃饭边吃边继续说。但是讨论完就会各自离开,吃完饭不会同路回宿舍。微信里说完事,发个ok,聊天就会止步于此。下雨了我没带伞困在图书馆,我只会求助我的室友。
电脑坏了,学校小门的巷子里,二十块钱就可以搞定,我为什么要去拜托不是我男朋友的异性。
我可以,你不可以吗?你不可以,又真的是因为友谊长存吗?


曾伴浮云归晚翠,犹陪落日泛秋声。世间无限丹青手,一片伤心画不成。

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旅行和签证

梁朝伟(划掉)有时閒觉著闷了,会临时到机场看航班,随便赶上哪班就搭上哪班,有一次飞到伦敦,独自蹲在广场喂鸽子,不发一语,当晚再飞回香港,当作没事发生。」

想要出行,需要搞定的恐怕不止机票,还有签证和核酸证明。签证,印象中,美国是比较麻烦的一个,当时从纽卡飞到伦敦签美国,哪怕预约了,还等了一整个下午。

德签是另一个比较不同的,若是短期的欧洲行,其实随便找个申根国签都可行,(哪个方便签哪个),但最好还是签到目标国为好。
若是长期,就相对麻烦点。首先提交的材料,最初一看大部分要求提交德语的,其实后来发现有些你坚持提交英文的,似乎也可能可以。德语部分就需要懂德语,不懂的就去淘宝找译文,可是怎么知道译得对不对——若你知道就自己译了啊。最后,感谢Google——一个404的网站,但是translate.google.cn是可用的,德英互译是相当得好!所有资料,我只是先拟了一个英文的,然后Google成德语,然后翻译回英语检查一下,如果译回来完全正确,那么相信我,德语也基本正确。第一次不放心,给德国的朋友看看,他回复我pretty good German,之后,我所有的资料都这么译,然后提交。

因为当时申请时间超过一年,就没选择那个直接给一年的签证的选项,当时还觉得这个是什么选项,难道不是申请多久给多久吗?最后下来是半年签证时间。
后来才知道,超过一年的,一般给半年,然后过去之后去延签,这个与英国不同(现在英国都脱离欧洲了,英国没脱欧的时候也不同)——所以对于想要去其他国家喂鸽子的(梁朝伟,划掉)人,第一个步骤可能是上使领馆官网了解签证政策,等你了解清楚了,(也就不想去了,划掉)才可以去。

延签之前有一个步骤是 Anmeldung (registration),这可能是落地之后最大的挑战,在一个月内找到合适的住房,如果你出行地点是 München (Munich)酱紫的城市,寻找住房是件很具挑逗性(划掉,应该是另一个词)的任务。
Anmeldung 是办理随后大概一切手续的基础,包括申请/激活你的银行卡。

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时间的彼方

上周在做一个与考古相关的课程sample,然后就想起这篇与考古相关的科幻,很久以前的了,98年的银河奖作品,作者赵海虹。那几年科幻世界的水平很高。在记忆中,有一段是这样写的,后来发现记忆不准确:

——“40年前遇见他,在我的时空,那时候他27岁,我20岁,他说我爱你,我笑了:在你的时空,当我早已为生活忙碌奔波,你应该还在地上玩泥巴…我笑出了眼泪;而现在我们再次相见,在他的时空,他依旧27岁,而我已经60岁了。我毫不掩饰我苍老的容颜,也不怕平静地凝视他依旧年轻的脸庞,真的是什么都没改变吗?还是一切都在改变?他应该没有忘记当时的一句我爱你,因为对他来说仅仅只是过了几个小时,也许还留着当初相拥时的气息;我也不会忘记,尽管对我来说却已经过了整整40年……”

是那个年代的作品比现在好吗?也许更准确的解释是:时间的彼方,我们老了。
附小说原文:

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亥姆霍兹

好久以前看到科学巨匠亥姆霍兹(Hermann Ludwig Ferdinand von Helmholtz) 就很想写一篇,可是写这种东东都在闲暇之余,所以一直就搁置着。那篇文章作者贴了一张在洪堡大学拍的亥姆霍兹雕像的照片,才想起啊这个是亥姆霍兹啊,因为是在洪堡大学,当时的关注点一直是洪堡( Friedrich Wilhelm Heinrich Alexander von Humboldt ) ,就像关注微信红包一样(划掉)——其实并没有, 手机上并没有这项功能 ,抗拒诸如此类,扫来扫去的东东。

亥姆霍兹,最相关的一项大概是亥姆霍兹双电层,但这项在亥姆霍兹浩瀚的研究成果中,甚至没有被特别提及。我们应该再也没有这种涉及众多领域的科学家了,知识不断累积的结果,一个狭窄的领域都足以耗尽一生。在专注一项的基础上,保持好奇心和广泛的涉猎,已经是很好的结果了。某年高考作文,撞题科幻世界——假如记忆可以移植——然而,可是,可但是,并不能。

这个是亥姆,下一个是洪堡
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Risk of downloadhelper

Downloadhelper is a good browser extension for downloading media. It is useful for obtaining addresses of targeted objects. However, I realized that there may be some risks of this kind of tools. The way it works is based on packet capture & analysis during network communication. If the communication is not encrypted, there may be privacy risks. The tool may be able to see what you receive and send. Therefore, it would be better to capture the address by yourself (see Video Streaming & Thunder, VanDyke, NetAnts, etc.); or use the tool on a computer without any private data——at least without any private data communication via browser.

这种话大概也就是得诺贝尔之后才有资格讲

很多观点,甚至做法,在真正的科学家中是有共识的;但是,并不是每个人都有资格去那么总结。

回想我自己的第一个模型,也是在等待一位朋友的间歇,在门外反复踱步的时候想出来的。当然,并不是那一刻,短短时间的思考之功,而是已经做了很长时间的研究了,那一刻突然想通了而已。这种体验,每个学者大概都会有。

” 在孩提时代,每个人都拥有着许多种可能性。你既可能成为职业棒球选手,也可能成为歌剧演唱家。但是,到了二十岁左右,我们就知道了自己的局限,就会因种种原因而将各种可能性自行消去,同时也会追问自己到底想做什么。无论是谁,都要过这一关。此时,你只能严肃认真地对各种可能性加以权衡,选择自己想做的事、擅长做的事。”
这一段,正和我前几天写专业选择时所想到的一样,实际上越往后,知识、经验越多,但是可能性越少,我们没有办法进入所有领域,所以,年轻时的选择非常重要。另外,我们无法成为所有领域的专家,但我们在精进一门的同时,完全可以涉猎尽可能多的领域,这能保持科研生涯的idea永不枯竭。而且,当你写完相对论的时候玩玩小提琴,画完鸡蛋之后画画人体解剖图,这不也蛮好吗?

日本医学家,2018年诺贝尔生理学或医学奖获得者本庶佑
本庶佑:真正一流的工作往往没有在顶级刊物上发表
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