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Overview Spacecraft data processing requires microcomputers and interfaces that are functionally similar to desktop systems However, space systems require: - Low power, volume, and mass High reliability and fault tolerance

Why Cost Estimation? Critically important part of system design Too high- lose the contract award Too low-over-run cost plus contracts, company loss on fixed price contracts Trends Design to cost Cost as an independent variable

General Incidence:low 1.5-6% 急性心包炎 慢性缩窄性心包炎 慢性心包积液 粘连性心包炎

Unit 10 Program Design Text 1 Computer Languages Eⅹ excises 1. Choose the best answer to complete the following sentences hat was represented by long strings zeroes A. machine language B. high-level language C. low-level language D. assembly language

SEMICONDUCTOR Fast Switching Thyristor Replaces July 2001 version, DS4267-40 DS4267-41July2002 FEATURES KEY PARAMETERS Low Switching Losses At High Frequency

Voclin 1400 V Doc. No. 5SYA 1213-02 Aug 2000 Patented free-floating silicon technology Low on-state and switching losses Annular gate electrode Industry standard housing Cosmic radiation withstand rating Blocking

The IPMTS.OAT1/T3 Series is designed to protect voltage sensitive components from high voltage, high energy transients http:/lonsemi.com Excellent clamping capability, high surge capability, low zener impedance and fast response time. The advanced packaging technique provides for a highly efficient micro miniature, space PLASTIC SURFACE MOUNT saving surface mount with its unique heat sink design. The

External dimensions(Unit: mm) High frequency rectification （1)Small power mold type(PMDS) （2) Ultra low VF （3)Very fast recovery

Risk Group 1 (no or low individual and community risk): A microorganism that is unlikely to cause human or animal disease. ORisk Group