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I^2C是英文Inter Intergrated-Circuit(内部集成电路)的缩写,也可把I^2c总线直观地看作集成电路间互联总线。I^2C总线系统的特点有:主控CPU通过两根I/O线与所有的外嗣电路进行信息交换,包括一条串行数据线SDA(DATA)及一条串行时钟线SCL(CLK);总线上挂接的每一个受控外围器件都必须设有地址脚和总线接口电路,接口电路主要由解码器、D/A 相似文献
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Wen-sheng Zhang Guan-quan Zhang 《计算数学(英文版)》2006,24(4):463-474
The alternately directional implicit (ADI) scheme is usually used in 3D depth migration. It splits the 3D square-root operator along crossline and inline directions alternately. In this paper, based on the ideal of data line, the four-way splitting schemes and their splitting errors for the finite-difference (FD) method and the hybrid method are investigated. The wavefield extrapolation of four-way splitting scheme is accomplished on a data line and is stable unconditionally. Numerical analysis of splitting errors show that the two-way FD migration have visible numerical anisotropic errors, and that four-way FD migration has much less splitting errors than two-way FD migration has. For the hybrid method, the differences of numerical anisotropic errors between two-way scheme and four-way scheme are small in the case of lower lateral velocity variations. The schemes presented in this paper can be used in 3D post-stack or prestack depth migration. Two numerical calculations of 3D depth migration are completed. One is the four-way FD and hybrid 3D post-stack depth migration for an impulse response, which shows that the anisotropic errors can be eliminated effectively in the cases of constant and variable velocity variations. The other is the 3D shot-profile prestack depth migration for SEG/EAEG benchmark model with two-way hybrid splitting scheme, which presents good imaging results. The Message Passing Interface (MPI) programme based on shot number is adopted. 相似文献
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上期,我们详细介绍了户外双向无线电定位系统的核心部件OpenTracker+(OT+)的详细制作方法,接下来,我们将说明系统的连接、配置和应用方法。数据线制作数据线用于 相似文献
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自多在杂志上看到西门子(SIEMENS)手机通讯软件于机工作室的介绍后,我对其丰富的功能和其对西门子系列手机的支持赞叹不已于是迫切地想拥有根数据线将我的3118和电脑连接起来这样就可以用五笔宇型输入短信用Micrsoft Outlook编辑通汛录甚至更新铃声与图片了。 相似文献
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