time-signal station 中文意思是什麼
time-signal station
解釋
報時站-
In light of the limitation of fast fourier transform ( fft ) for the method of traditional spectrum analysis to analyze the unsteady signal, wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test on the vibration of two - row placed units in lijiaxia hydropower station, in which the signal is decomposed into different frequency band, and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source
摘要基於李家峽水電站雙排機組振動的現場試驗研究，並且針對傳統頻譜分析方法傅立葉變換（ fft ）對于非平穩信號已力不從心這一缺陷，利用小波分析方法在時域和頻域上同時具有良好的局部化性質，通過對開停機這一典型非平穩過程信號進行小波及小波包分析，將其分解到不同頻帶內，獲取微弱信息和提取優勢頻率，並對其作振源分析，得出開停機初始時刻因水流不穩均出現強烈的振動現象，且低頻段信號能量最大，開停機過程水流脈動壓力和尾水渦帶擺動是引起定子基礎振動的主要原因。 -
Time signal station
時間信號站 -
Spread spectrum code emitted by navigation station has correlative operation with the signal produced by receiver, through measuring the place of maximal correlative function, we can measure the spreading time of the navigation station ’ s signal, so we can measure the distance between navigation station and receiver
區域導航利用導航臺發射的擴頻碼與接收機產生的本地信號進行相關運算，通過測量相關函數最大值的位置，來測定導航臺信號傳播時間，從而測定導航臺到接收機的距離。 -
Sir lok could still recall the time when he worked at the weather station in cape collinson. making weather observations outdoors amidst a typhoon when the no. 8 signal was up was no small feat. the only precautionary measure was a rope around his waist, tied to some bulky furniture inside the station building
樂哥回想當年駐守哥連臣角氣象站時，遇上臺風襲港，八號風球高懸，要到戶外進行天氣觀測，他的防風措施便是腰纏大麻繩，再把繩的另一端綁扎于站內的大傢俱上。 -
Research on retrieval of gps water vapor and method of rainfall forecast are keen field which draws all attention from wide world. the dissertation is accomplished on the basis of sino - italy collaborative project - ' the integral system of flood risk programming, monitoring and real time forecasting " and the primary achievements and conclusion reached include : ( 1 ) a reasonable design has been made for gps water vapor monitoring network according to the theory of gps satellite signal propagation and vertical distribution of water vapor and local synoptic characteristic of binjiang basin, the effective area where water vapor can be detected by gps station has been determined under different cut - off angles. the conclusion has been reached that 3 ~ 4 gps receivers are enough for water vapor monitoring in binjiang basin
Gps水汽反演和降雨預報研究是當前氣象遙感應用的一個前沿探索領域，本論文依託于中意科技合作項目「洪水風險規劃、監測和實時預報的集成系統」 ，主要成果體現在以下方面： （ 1 ）提出了一個合理的gps水汽監測網設計方案根據gps衛星信號傳播原理和水汽垂直分佈規律以及流域天氣的地方性特徵，確定了不同高度截角下一個gps站所能測定大氣水汽含量的有效范圍，得出了濱江流域只需要3 4個gps接收機就足以反映流域水汽變化的結論。 -
This paper researches a practical engineering project - a technical reform on an dispatching & supervising system of tangshan limited corporation, which involves the technology of computer control. communication and net. the system realizes the real - time supervision in the center of dispatching, the data collection of the signal equipments of the railway station, and the data transmission from live to the center of dispatching, at the same time, supplies the interface for distance user to visit the lan of the center of dispatching and for the lan to connect the internet
本碩士論文選題源於一個實際的工程項目?唐山鋼鐵股份有限責任公司調度監督系統的技術改造，該項目綜合了計算機控制技術，通信技術和現代網路技術。本系統在調度所實現了對現場車站信號設備的實時監視，在現場車站實現了對信號設備狀態的數據採集，並實現了從現場到調度所的遠程數據傳輸，同時為遠程用戶訪問調度所的局域網和局域網連接到internet提供了介面。
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