time-of-arrival location 中文意思是什麼

time-of-arrival location 解釋
時差定位法
  • time : n 1 時，時間，時日，歲月。2 時候，時刻；期間；時節，季節；〈常pl 〉時期，年代，時代； 〈the time ...
  • of : OF ＝Old French 古法語。
  • arrival : n. 1. 到達，抵達。2. 到達者；到達物。3. 出現，登場。4. 新生嬰兒。
  • location : n. 1. 定位；【鐵路】定線，〈美國〉測量，設計。2. 位置，場所，地點。3. 拍攝外景；外景拍攝地。4. （房屋，土地等的）出租。5. 非洲土著居住的城郊。
  1. Referring to the classical location method attributed to geiger, this paper brings up a scheme according to energy tracking and time difference of arrival ( tdoa ) theory to the position location of the survivor. and proves the feasibility of this scheme through a series of experiments

    參照經典的地震定位方法（ geiger法） ，提出了一種基於能量追蹤和時差定位的生命搜索定位技術方案，並且通過模擬實驗和計算，論證了該方案的可行性。
  2. Based on the facts that time of arrival ( toa ) of the first multipath signal is always most close to that of los propagation and angle of arrival ( aoa ) of the first multipath signal is not always most close to that of los propagation among all multipath signals in nlos propagation environment, a location algorithm is proposed to mitigate the influence of nlos propagation, which effectively reduces the feasible region of a ms in macrocells

    依據在非視距傳播環境下存在的以下兩個事實：第一，最先到達多徑信號的波達時間總是最接近直達波的波達時間。第二，最先到達多徑信號的波達方向並不一定最接近直達波方向。針對宏蜂窩系統，從有效減小移動臺可行域的角度，提出了一種減輕非視距影響的定位演算法。
  3. On receipt of this and similar information from other seismograph stations in different countries, ptwc would determine the location, depth and magnitude of the earthquake and assess the likelihood of a tsunami. it would send a message to participating countries and territories on details of any tsunami forecast including the expected arrival time and amplitude of the tsunami at different locations around the pacific

    太平洋海嘯警報中心收到各國地震站的地震資料后，會計算地震震中位置、深度和地震強度並且評估發生海嘯的可能性，並向參與的國家及地區發送詳細海嘯預測資料，包括預期海嘯到達太平洋沿岸各地區的時間及海嘯高度等。
  4. Theoretic location - error analysis of the method of three stations time of arrival by nemp

    三站時差法定位理論誤差分析
  5. The geomorphological instantaneous unit hydrograph ( giuh ) is viewed as the frequency distribution of the times of arrival of individual water deoplets at the catchment outlet. the travel path, for a typical hillslope cell. consists of a hillslope fraction, corresponding to overland flow and a stream fraction, corresponding to concentrated channeled flow. to obtain the time of travel, velocities must be defined. hillslope and stream velocities vary with location and must be strongly correlated with slope, and therefore a spatial distribution of velocities and hence of travel times could be obtained. the present methods of giuh neglect any time delays associated with overland flow pathways

    地貌單位線被看作是流域上各水質點在弱相互作用下，到達流域出口匯流時間的頻率分佈。對於一個典型的山坡型網格單元，匯流路徑由兩部分組成，即坡地部分和河道部分，為了得到匯流時間，必須首先確定匯流速度。坡地和河道的匯流速度隨著區域位置而變，並且必然與坡度有關，因此，可首先計算流速的空間分佈，進而得到匯流時間的空間分佈。
  6. The lightning location is calculated using the time of arrival and direction of the electromagnetic waves generated by the lightning discharges as detected by the network sensors. the network monitors lightning activities over the pearl river estuary round the clock

    ，利用各探測站接收閃電釋放出來的電磁波的時間及方向來計算出閃電的位置，廿四小時不停監察發生於珠江三角洲的閃電。
  7. In 3g communication system, the most promising location method was the locating arithmetic based on the time of arrival and the time difference of arrival ( toa / tdoa ) of signal, or the angle of arrival of signal ( aoa ). however, either the arithmetic based on toa or that based on aoa was badly affected by the none line of sight ( nlos ) phenomenon

    在第三代移動通信系統中，最有前景的定位方式是基於信號到來時間/時間差（ toa / tdoa ）或信號到來角（ aoa ）的定位演算法。但不管是基於信號到來時間的演算法還是基於信號到來角度的演算法，定位信號的非視距傳播效應（ nlos ）都會對其造成嚴重的影響，在影響移動定位精度的諸多因素中nlos效應被公認為是最主要的因素。
  8. The emitter location methods commonly include : angle of arrival ( aoa ) measurement, time - difference - of - arrival ( tdoa ) measurement and aoa together with tdoa measurement. this paper derive some important techniques and theories bearing upon passive location in this field. three kinds of passive location algorithm in three - dimensional ( 3 - d ) space are deduced based on that of 2 - d space. at the same time each performance is analyzed, each graph of geometric dilution of precession ( gdop ) is emulated for different station position, different measurement error, and different target height. accordingly some valuable academic and emulational results are obtained by myself, which will provide researches in this field with definite technical refrence. at the end of this paper, the passive location method of jtids ( joint tactical distribution systems ) is discussed, which is expected to enforce the tactical performance of jtids in the intending development

    本文汲取了該領域有關被動定位的重要技術和理論，在二維平面無源定位演算法的基礎上推導出了三維空間內的三種無源定位演算法，並對各自的定位性能進行了理論分析和計算機模擬，模擬出不同的布站、不同的測量誤差以及不同輻射源高度的情況下，三種定位方法各自對應的定位精度（ gdop ）分布圖，同時對各自的定位性能進行了改進處理，得出了一些有價值的理論和模擬實驗結果，這些結論可為今後在此領域的研究提供一定的技術參考。
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