computer science

Lemote

Lemote is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Lemote rather than just read about it. In short: Jiangsu Lemote Tech Co., Ltd or Lemote (Chinese: 航天龙梦; pinyin: hang tian lóng mèng; lit. 'Aerospace Dragon Dream') is a computer company established as a joint venture between the Jiangsu Menglan Group and the Chinese Institute of Computing Technology, involved in computer hardware and software products, services, and projects. History In June 2006, shortly after Institute of Computing Technology of the Chinese Acad…

Key takeaways

Lemote belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Lemote to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Lemote from memory before moving on to harder problems.

Reference excerpt

Jiangsu Lemote Tech Co., Ltd or Lemote (Chinese: 航天龙梦; pinyin: hang tian lóng mèng; lit. 'Aerospace Dragon Dream') is a computer company established as a joint venture between the Jiangsu Menglan Group and the Chinese Institute of Computing Technology, involved in computer hardware and software products, services, and projects.

History In June 2006, shortly after Institute of Computing Technology of the Chinese Academy of Sciences developed Loongson 2E they need a company to build end product, so the Jiangsu Menglan Group began a joint venture with the Institute of Computing Technology of the Chinese Academy of Sciences. The venture was named Jiangsu Lemote Tech Co., Ltd. A computer was announced by Fuxin Zhang, an ICT researcher also a Lemote staff, who said the purpose of this project was to "provide everyone with a personal computer". The device is intended for low income groups and rural area students.

Hardware Lemote builds small form factor computers including network computers and netbooks with Loongson Processors.

Netbook computers

The Yeeloong netbook computer is intended to be built on free software from the BIOS upwards, and for this reason is used and recommended by the founder of Free Software Foundation, Richard Stallman as of September 2008 and 23 January 2010. The specifications are:

Loongson 3A laptop Loongson insiders revealed a new model based on the Loongson 3A quad-core laptop has been developed and was expected to launch in August 2011. With a similar design to the MacBook Pro from Apple Inc., it will carry a Linux operating system by default. In September 2011, Lemote announced the Yeeloong-8133 13.3" laptop featuring 900 MHz, quad-core Loongson-3A/2GQ CPU.

Desktop computers Lynloong, all-in-one desktop computer, combined computer and monitor, without keyboard. Myloong, desktop diskless network computer (NC), without monitor or keyboard. Fuloong, see below.

Products in development Hiloong, SOHO and family storage center.

Fuloong 2 series of small desktop computers The Fuloong 2 series is a desktop computer that costs CN¥1,015, €100, US$131. It ships with two Linux distributions, Debian and Rays Linux, but any other distribution that has a mipsel port can be installed, e.g. Gentoo Linux.

Fuloong 2E

The reference hardware specifications as of 28 October 2006 are:

Dimensions: 18.8 × 14.5 cm CPU: Loongson 2E 64-bit, integrated DDR controller, 64 KiB cache level Clock speed: 667 MHz Southbridge: VIA VT82C686B DDR SDRAM: 256 MiB Hard disk: IDE 40–60 GB Video card: ATI Radeon 7000M (RV100) 16MB PCI Network controller: Realtek 8139D, 10/100 Mbit/s USB ports: 4 Power supply: external 12V 4A DC

Fuloong 2F The Fuloong 2F computer was released on 30 June 2008, priced at CN¥1,800, about €163, $257. The specifications are:

Dimensions: 19 × 14.5 × 3.7 cm CPU: Loongson 2F, integrated DDR2 controller Clock speed: 1 GHz Southbridge: AMD CS5536 DDR2 SDRAM: 512 MB Hard disk: IDE 120 GB Video card: XGA V2, 32 MB video RAM, with VGA, DVI and S-video ports Network controller: Ethernet, Realtek RTL 8110SC, 1000 Mbit/s USB ports: 2.0, 4 Infrared receiver Power supply: external 12 V power adapter Operating system: Xinhua Hualay Rays 2.0, which is a Linux distribution that supports MIPS architecture. Fuloong 2F also works well with other Linux distributions, OpenBSD, and NetBSD.

Fuloong Mini-PC The specifications are:

Software Lemote has participated in development and MIPS-porting of Debian Linux, eCos, MicroC/OS-II, VxWorks, Microsoft Windows CE, Java, OpenOffice.org and Yongzhong Office by Wuxi Yongzhong Tech Co. It also develops a Loongson processor simulator based on GXemul. In part to its ability to run only libre software, without proprietary binary blobs, Richard Stallman famously used the Lemote Yeeloong.

See also OLPC XO-1, also called the $100 Laptop project Classmate PC, a low cost machine developed by Intel Sinomanic Tianhua GX-1C, part of a line of affordable machines developed by Sinomanic in China Simputer, an earlier project to construct cheap handheld computers in India VIA pc-1 Initiative, a project of VIA Technologies to help bridge the digital divide

References

External links Official website (in Chinese, defunct as of January 2019) Old Lemote site in English at the Wayback Machine (archived December 19, 2015) Institute of Computing Technology (in Chinese), ZH.

News articles (by date) "China to produce low-cost computers of its own", Xinhua, 3 March 2006, archived from the original on 2 September 2007, retrieved 6 March 2007. "The Lemote Box", Virtual China, 7 January 2007.

Illustrations

Worked examples

Example 1 — a first encounter with Lemote

Start with the simplest possible case. Write down what Lemote claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Lemote before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Lemote ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Lemote

In research: Lemote appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Lemote in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Lemote is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2006 in Suzhou, Appropriate technology, Changshu, so understanding it makes those chapters shorter.
In everyday life: Look for Lemote outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Lemote in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lemote means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Lemote out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lemote in simple terms?

Why does Lemote matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Lemote?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Lemote.