使用時鐘PLL的源同步系統(tǒng)時序分析一)回顧源同步時序計算Setup Margin = Min Clock Etch Delay – Max Data Etch Delay – Max Delay Skew – Setup TimeHold Margin = Min Data Etch Delay – Max Clock Etch Delay + Min Delay Skew + Data Rate – Hold Time下面解釋以上公式中各參數(shù)的意義:Etch Delay:與常說的飛行時間(Flight Time)意義相同,其值并不是從仿真直接得到,而是通過仿真結(jié)果的后處理得來。請看下面圖示:圖一為實際電路,激勵源從輸出端,經(jīng)過互連到達接收端,傳輸延時如圖示Rmin,Rmax,F(xiàn)min,F(xiàn)max。圖二為對應(yīng)輸出端的測試負載電路,測試負載延時如圖示Rising,F(xiàn)alling。通過這兩組值就可以計算得到Etch Delay 的最大和最小值。
This document discusses recommended practices and style for programmers using the C language in the Flight Dynamics Division environment. Guidelines are based on
generally recommended software engineering techniques, industry resources, and local
convention. The Guide offers preferred solutions to common C programming issues and illustrates through examples of C code.
Scotia Airlines is a new budget airline operating between Glasgow Airport and the Western
Isles. It operates two 24-seater light passenger aircraft and requires a Flight booking system.
Because Scotia offers low cost air travel, there is a need to treat each Flight as single cost centre
and to be able to ascertain, at any moment, the amount of the cash taken for that Flight.
Reservations and bookings cannot be made until the Flight details have been finalised (Flight
number, departure and arrival airports). A seat on a Flight is considered booked when payment
as been received for it. When a reservation is confirmed (changed to booked), the passenger
name is checked against the original reservation.
A Flight can be in any of the following states:
Available for bookings
Checking in
Boarding
Closed
數(shù)字圖像處理基礎(chǔ)理論,英文資料Restoration and Enhancement
Space Pictures (blurred, noisy, distorted)
Computerized Tomography
Coding
Transmission – Teleconferencing
Storage – Land SAT Images
Pattern Recognition
Blood Cell Analysis
Remote Sensing
Robotic Vision
Computer Graphics
Flight Simulation
Auto Body Design
Special Effect in Movie
This model shows NASA s HL-20 lifting body modeled in Simulink, and Aerospace Blockset. This model simulates approach and landing Flight phases using an auto-landing controller.