不积跬步,无以至千里
不积小流,无以成江海

Great journeys begin with small steps;
mighty rivers grow from little streams.

After almost 2-year, cycling to sentosa


浅谈任务调度中的自身依赖

在大数据处理中,因为算法或者业务逻辑的要求,有时候需要依赖任务本身的历史数据,譬如,当前业务日期依赖T-1,即昨天的计算结果。这就是自依赖,在任务调度图上看,就是一个闭环。 以T-1来说,如果昨天的任务没有完成,那么今天的业务日期是处于等待状态,直到昨天的完成为止。这种有个潜在的风险是,如果任务失败,而又不能及时发现并重启,那么后续的所有业务日期的任务都处于等待。而且,重启任务要从最...

Passion fruit in sky garden


East Coast park , 东海岸公园


Learn programming - C++ basic

I will share some slides being prepared to teach basic C++ to children. C++ is beautiful and useful, particularly when your system has high requirements on efficiency with limited resources. Alth...

宽客人生读后感

从一档podcast听到这本书,就找来看看。这是一本介绍Emanuel Derman,一位在哥伦比亚大学受训为理论物理学家,如何经历职业的震荡,最终成为一位量化分析师的过程。如果我在博士刚毕业的时候能看到这本书,可能我的个人职业发展也会是不一样的人生。 对于立志从事科学研究的人,读完这本书,可能要重新审视自己的决定。 六七十年代的哥大,那是理论物理学的重地,因为有李政道在那...

East coat, many people rest at beach


Flying kite


Go to East Coast


Garden by the Bay to Marina barrages


Learning Python, a step closing to AI - 8

If you are interested in AI, machine learning, master a programming language is a must. Python is top-1 language for its simplicity and many third-party packages available that allow you develop ...

Learning Python, a step closing to AI - 7

If you are interested in AI, machine learning, master a programming language is a must. Python is top-1 language for its simplicity and many third-party packages available that allow you develop ...

Learning Python, a step closing to AI - 5

If you are interested in AI, machine learning, master a programming language is a must. Python is top-1 language for its simplicity and many third-party packages available that allow you develop ...

Learning Python, a step closing to AI - 6

If you are interested in AI, machine learning, master a programming language is a must. Python is top-1 language for its simplicity and many third-party packages available that allow you develop ...

Learning Python, a step closing to AI - 4

If you are interested in AI, machine learning, master a programming language is a must. Python is top-1 language for its simplicity and many third-party packages available that allow you develop ...

Learning Python, a step closing to AI - 3

If you are interested in AI, machine learning, master a programming language is a must. Python is top-1 language for its simplicity and many third-party packages available that allow you develop ...

Learning Python, a step closing to AI - 2

If you are interested in AI, machine learning, master a programming language is a must. Python is top-1 language for its simplicity and many third-party packages available that allow you develop ...

Learning Python, a step closing to AI - 1

If you are interested in AI, machine learning, master a programming language is a must. Python is top-1 language for its simplicity and many third-party packages available that allow you develop ...

Greenway and railway corridor - great jogging and cycling place

In the past, it is rail way connecting Singapore with Malaysia, starting from Tanjong Pagar station in city, and entering Malaysia through woodland. But now, it is retired and is rebuilt as a Nat...

Flowers young vs old. First time notice old is becoming whole black


Natural greenway corridors


Greenway corridor


AB test, Huber, my pet dog, smart or not

Huber, my pet dog, is smart. He knows when I will go outsider without taking him and when I will take him go to play. He knows it from my dressing based on his past experience. Normally, I ...

IKEA $1 hotdog


Happy Huber, playing his toy


Beautiful nature

Working bee Flying into stamens and back out

Device graph - cross-device link

In modern society, many of us have multiple devices,such as desktop pc,mobile phone,pad,et at and are surfing the internet using different devices. Some may surf using different browsers such as ...

Ads targeting

As a publisher platform, broadcast companies create content to attract users to their platform, and earn money by ads operation or by content subscription. Because media company is business drive...

Flowers in neighborhood garden park. Morning, fresh air and flower


Morning flowers after night raining.


Museum of ice cream, long queue, about 40


Daylight Alexandra canal

Alexandra canal

Orchid shopping street resting

Before Covid-19’s, orchid road is always crowed, even more in the weekend. Singaporean likes go outside shopping, eating. But now, shopping street is in rest. Orchid shopping street duri...

Youtiao and sesame ball yellow bean

Every weekends breakfast is sesame ball yellow bean (黄豆煎枣, Huang dou jian zao), and you tiao (油条, you tiao). This morning, I come to GHim Moh . After long queue carrot cake, another long queue. ...

Ghim moh carrot cake

This morning 30-min cycling to Ghim Moh to buy my favorite carrot cake. My son said carrot cake in Redhill market not good. As normal, long queue. The family cooker is busy to cooking white and...

Cycling outside city, along ulu pandas river

3 years ago, in the evening, I like to walking along ulu pandan river, near Ghim moh and holland village. Since railway green way open and Covid-19, has never come. This weekend, cycling along ...

Huber’s favourite chicken jerky

My family Huber, loves chicken. Previously, we cook boiled chicken to him. For his health, it is better to feed dried chicken, like dog dry food. Huber From a few weeks ago, after boiling...

SQL optimization - long tail affecting performance

It often happens that you need join multiple tables (more than two) into one and do some computation. the you will find many instances are long tails. All other instances complete, long tail inst...

Electric vs non-electric pressure cooker

In my kitchen, I have a set of pressure cooker, a 4.5L and 2L. It is non-electric. Electric pressure cooker has more functions you can select on menu. But frankly, most of time, we use default ...

Ghim Moh market - Carrot cake

Delicious carrot cake When I live in Holland village, every weekend or holiday morning, I go to the carrot cake shop to buy breakfast for my family. The shop only sells carrot cake, and its...

Great setting sun, light go through the building gap.


Hen, chick, and hen in neighboring park,楼下的母鸡小鸡和公鸡

母鸡和小鸡, hen and chicks. How many chicks you find? In the neighborhood park outside the Hdb house building, there is a hen with her chicks, about 4. Every morning when I and my Huber walking al...

Viewer forecasting - predicting how many users will read or watch your content

Media companies create News article, audio, and video content to engage users to their platform and provides Ads service to make money. The content creators must understand which topics are most ...

Decoration along walking road neighborhood park


儿时回忆 - 炒料豆

我的家乡在鲁西南的一个小县城的农村,一个农业县。在我小的时候,中国的七八十年代,其实没有什么零食吃。在一些节日,家里会自己做些,饱饱家里小朋友的口福。 现在记得蛮深的是小时候吃的料豆,其实就是黄豆泡发,然后炒至而成。这应该是山东这边的习惯,表示每年春天的开始。每年二月二的时候,各家各户都在做,然后第二天上学的时候,小朋友的口袋里就装满了料豆。有咸的,有甜的。大家互相交换着吃。 我...

海上生明月,天涯共此时

中秋之夜,朋友圈已经被各式风格的月亮霸屏了。 海上生明月,天涯共此时。远在天涯的我们,虽然不能和国内的亲人共度佳节,但同一轮圆月链接着你和我。 中秋之夜,团圆之日

8月15月儿圆, Chinese mid-august festival


恋家狗

Hubber是我们家的小黑狗,一个恋家狗,他很不情愿到离家远一点的地方,每次都是拖着他、拉着他,直到他知道无法抗拒,才乖乖地往前走。记住,是慢吞吞。一旦他发现机会可以回头,可以回家了,立马换了一个似的,撒了欢的奔跑。每次搞得我都是精疲力竭。 Hubber是只爱花花草草的狗,每次在楼下,总是找花花草草,这里闻闻,那里嗅嗅,很富有探索精神。 Hubber是只胆小的狗,因为他个头太小了...

中秋节话月饼

晚上出去遛弯,抬头一望,天空中一轮蛋黄的月亮,才猛然意识到中秋节就要到了。在中国人的传统里,中秋是阖家团圆的日子。想起王维的“九月九日忆山东兄弟”,寄托念家的思绪。 独在异乡为异客,每逢佳节倍思亲。 遥知兄弟登高处,遍插茱萸少一人。 2019年开始的covid19疫情使得回家的路遥不可及。 中秋节少不了月饼,圆圆的月饼寄托着中国人的团圆。 记得小时候不喜欢吃月饼。在山...

勿忘九一八

今天是九一八90周年,90年前的今天,日本发动了侵华战争,而且至今没有正式道过歉。铭记历史,才能防止灾难的再次发生,和平来之不易,珍惜现在,共同努力。

Singapore river and beautiful night scene

Singapore is a city country, and has short history. But when you travel to Singapore, there are still many feature spots you enjoy. One is walking or cycling along Singapore river. Starting fro...

Buy breakfast to redhill market. Start with a little rain drop, then big rain, then small drop. Rain coming fast and stop also fast. Good cool morning.


River bar street, night life


Hungry, rest, come here


Money here😀


Apple flagship at Marina Bay Sands


LV at Marina Bay sands


Marina Bay Sands


Night cycling Singapore river


Simple lunch, 简单午餐

今天晴朗万里,真是好天,好热。快速做个中餐,土豆白菜炖米饭(剩米饭),外加几颗蒜头和辣椒开开胃。舌头最近有点疼,就外加一个山东老家的开水冲鸡蛋茶(盐+香油)。10分钟搞定。 Lunch: potato + Chinese cabbage, when cooking almost done, add a few garlic and chili, then add cooked...