Tag Archive: website


A good website about Search Engine Guilde

http://www.searchengineguide.com/

Example on Chemical: http://www.searchengineguide.com/pages/Business/Chemicals/index.html

Chemicals Search Engines:

Adhesives - [New Window] – Specialized industrial directory for adhesive supplies, equipment and services.

AdhesivesMart - [New Window] – Database of adhesives, sealants and tapes for industrial use.

BuyersGuideChem - [New Window] – A directory of suppliers of chemicals and chemical products.

Chem.com - [New Window] – Catalogs and directories of suppliers, distributors, manufacturers, custom synthesis companies.

Chemcompass - [New Window] – The buyers guide for manufacturers and traders of the chemical trade. Search for companies, product entries, product lines, brand names.

Chemical World - [New Window] – A portal which guides you through the world of the chemical industry: chemistry, fuel cell, explosives, polymers, biochemistry etc.

ChemIndustry.com - [New Window] – Worldwide search engine of the chemical industry – search for chemicals, equipment, services and chemical information.

ChemNet - [New Window] – Directory and database of chemicals and chemical manufacturers.

Indian Chemical Portal - [New Window] – A chemical portal that gives you an insight into the Indian Chemical Industry with information about relevant trade offers, EXIM policies, international events, organisations and lots more.

Industrial Chemicals - [New Window] – Thomas Regional’s specialized directory of industrial chemicals and related products and services.

Plastics.com - [New Window] – Plastics directory and plastics professionals databases.

PlasticsNet - [New Window] – Find products and suppliers, read current headlines, and keep up with the latest information in the plastics process industry.

PSI – Polymer Search on the Internet - [New Window] – Search engine for the global polymer, plastic and rubber industries. Includes daily industry news.

MATCH ME IF YOU CAN

By Tim Harford

Whenever I shop at John Lewis, I see its price promise, “Never knowingly undersold”, displayed in an attempt at reassurance. It makes me very suspicious indeed. Not that I doubt the promise to meet any competitor’s price. I’m sure that happens regularly. What bothers me is the possibility that this kind of promise drives prices higher, not lower.

The problem with a promise to match a competitor’s price is that it will discourage the competitor from cutting its price in the first place. If I went into business, one obvious way to win some customers would be to reduce my price. If the competitor’s emporium across the road boasted a price promise, I might not bother

Imagine that a company threatened its competitors with the following statement: “We guarantee that there is no point in you trying to beat us on price. We send people around to your stores to make sure you’re not trying any funny stuff. Better, we pay our customers to look at your prices and tell us about them. So forget it. Keep your prices high and so will we, and nobody will get hurt.”

John Lewis doesn’t say that, and nor do any of the other businesses that make price-matching promises. Any company that tried it would be hauled up before the Office of Fair Trading in short order, not to mention the fact that customers would be unlikely to approve. Still, I am not sure that the difference between the promise to customers and the threat to competitors is anything more than rhetorical.

Price transparency is a double-edged sword. If customers can easily compare lots of prices, then they will seek out the best deal. But if customers can easily compare lots of prices, so can competitors, and if they quickly cut prices in response, they will also win back customers very quickly. Companies will realise that cutting prices to win market share is a mug’s game.

The price of airline tickets, for example, used to be notoriously opaque. Now you can log into a consolidator website and compare lots of different prices, but it’s far from clear that this has led to more cut-throat offers.

I asked for some quotes just now for a week-long return trip from London to New York in a fortnight’s time. The internet broker dug up 200 offers from five different airlines, most of which were for the exactly same price:

大型网站架构之:MySpace的体系架构-意外错误

  如果没有对系统架构的历次修改与升级,MySpace根本不可能走到今天。但是,为什么系统还经常吃撑着了?很多用户抱怨的”意外错误”是怎么引起的呢?

大型网站架构之:MySpace的体系架构-MySpace网站架构的变迁

MySpace 经历了六个里程碑的过程。

各大搜索引擎网站登录入口

Google网站登录
Baidu 网站登录
Yahoo 网站登录
Live 网站登录
Dmoz 网站登录
Coodir网站目录登录
Alexa 网站登录
Sogou 非商业登录
中国搜索网站登录
iAsk 网站登录
搜索引擎收录查询
有道搜索网站登录
Accoona 网站登录
Onebigdirectory.com 搜索引擎批量提交
Chainer.com 搜索引擎批量提交
Freewebsubmission.com 搜索引擎批量提交

MySpace.com有着6500万的订阅者,是因特网上增长最快的网站之一,每天还有260,000新用户注册。它经常因为性能问题而受指责,MySpace不得不处理其他网站很少碰到的或大或小的一些问题。它们是怎么做的呢?

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