hhoff衍射理论，结合临床实际，考虑振幅近似和相位缓变条件，由傅里叶变换和卷积定理，导出了微聚焦X射线相衬成像（X-ray Phase-contrast Imaging，X-PCI）在像平面上焦斑尺寸范围内的能量密度分布函数.结果显示，像密度函数是吸收效应滤波函数FA(x)和相位效
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The advanced technologies adopted on a new style bus, PCI X, are introduced in this paper, e. g. the register to register communication mode, and the feature segment technology.
介绍了新型总线结构PCI X采用的先进技术，如“寄存器到寄存器”通讯方式、特征段技术等。
Both systems also offer 2 x ISA Slots and 5 x 32-bit PCI Slots, which are becoming increasingly hard to find in the marketplace.
这两种系统还提供2个ISA插槽和5x32位PCI插槽，这样好的功能越来越难在市场上找到。
One slot can be configured as a PCI-X slot to work with PCI-X expansion cards, allowing you to preserve your investment in expensive or custom I/O cards and devices.
其中一个插槽可以作为PCI-X插槽，用来安装PCI-X扩展卡，可为您省去购买昂贵的或者自自定义输入输出卡等设备的费用。
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