如何正确地选择电磁屏蔽衬垫

在通讯、计算机、自动化、医疗等商用电子设备上选择最有效的电磁屏蔽衬垫时,通常可以考虑以下三种衬垫类型：导电橡胶、导电布、铍铜指簧。依据设备的不同需要,这几种类型的衬垫可提供不同程度的电磁屏蔽,适合不同的形状和环境密封的要求。     

Housing Careers,House Price Dispersion and the Housing Market Multiplier

Housing markets reflect our housing consumption profile over the life cycle. As we age, marry and have kids, we seek larger dwellings and to a greater extent owner-occupied housing. The up-trading process has two key characteristics: first, it is equity induced. Second, it impacts both the supply and demand sides of housing markets. This is our point of departure. The paper combines a housing ladder with a house price index to show how up-trading amplifies shocks and introduces a multiplier into the housing market. The interplay between market segments results in up-trading induced price dispersion and a price response in the segments on top of the ladder that exceeds those of segments further down, even when shocks are equal across market segments. Finally, as up-trading impacts both housing supply and housing demand, even balanced shocks to net demand might impact house prices. Focusing on different market segments, shocks to demand might have both direct (the size effect) and indirect (the up-trading effect) effects on the house price index. This paper highlights policy options at a finer level when in need of stimulating or dampening house price cycles.