Spark can potentially be used for full - cycle code compilers interpreters , not only for the " parse and process " job i look at Spark還可以進一步用作完整周期的代碼編譯器解釋器,而不是只用于我所描述的“解析并處理”的任務(wù)。
In satellite navigation and positioning system , time is important information for fast and direct acquisition of long cycle code , one of its important aspects is the uncertainty compression of signal ' s propagation delay to reduce time search range 摘要衛(wèi)星導(dǎo)航定位系統(tǒng)中,輔助長碼快捕的一個最重要的信息是時間信息,衛(wèi)星信號傳播時延估計是提供先驗時間信息,減少時域搜索范圍的一個重要方面。
Simulation results indicate that the algorithm can reduce the delay ' s uncertainty range greatly , even with great position errors the uncertainty range still can be reduced to the half , and is effective for the fast acquisition of long cycle code 數(shù)值計算表明,算法能夠大大壓縮不同導(dǎo)航星和不同場景用戶之間傳播時延的不確定范圍,即使在用戶與衛(wèi)星位置誤差較大的惡劣應(yīng)用背景下也能將不確定范圍壓縮一半,從而有效地輔助長碼快捕的實現(xiàn)。