A heat sink is a device that incorporates a fan or another mechanism to reduce the temperature of a hardware component (e.g., processor). There are two heat sink types: active and passive. The picture is an example of a heat sink with both active and passive cooling mechanisms.
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According to reports, the 2013 Automobile Market Forecast Report released by the China Association of Automobile Manufacturers today shows that the demand for the automobile market in China this year reached 20.8 million, of which the growth rate of imported cars was as high as 25%. In the future, the automobile policy will reduce the protection of independent brands.
According to Jian Jianhua, deputy secretary-general of the China Automobile Industry Association, the demand for the automotive market in China in 2013 is still huge.
Shi Jianhua: The annual auto market demand is about 20.8 million units, and China's total car sales are expected to reach 20.65 million units, with a growth rate of around 7%. Now multinational companies are still optimistic about the Chinese market and continue to introduce new products. Some of the stronger economically stronger consumers will still buy imported cars. The sales volume of imported cars this year is expected to be around 1.45 million, which is about 25%.
In addition, in terms of policy, Wu Wei, Director of the Industry Coordination Department of the National Development and Reform Commission, said that in the future, China’s auto policy will be biased toward perfecting market mechanisms and reducing protection.
Wu Wei: If we say that the previous policy was to try to protect our industry and not let others infringe too much, the policy in the future may be more physical and healthy. That is, our original policy was to make ourselves fat. More may be stronger, the market is more open, and later hope that everyone can compete well without these policies.
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The material used partly determines the extent of thermal conductivity. Copper and aluminum are the most widely used materials, though aluminum is the more common choice because copper is more expensive and heavier. Aluminum 6061 and 6063 are widely used with a thermal resistance of 166 and 201 W / mK, respectively.