path loss 中文意思是什麼
path loss
解釋
路徑損耗-
In combination with the rapid development of highway construction and the present severe situation of tilled land and land resource, effects on economy, society and resource produced by highway construction are approached from three different angels : the improvement to the economy and society development, the peculiarities and the severity of occupation of land resource and the bad effects on land use caused by soil and water loss, thus arousing the people to pay high attention to the occupation of land resource in highway construction. a method of cost - benefit analysis is approached to evaluate the economic rationality of occupation of land in highway construction and the social benefits produced by highway construction are analyzed qualitatively ; at last, these methods are tested and verified through a concrete engineering in yangling agricultural hi - tech demonstrational zone and effective technological and systematic measures are put forward in order to settle the problem onto a compatibly developmental path
本研究從公路建設迅速發展的實際和土地、耕地資源面臨的嚴峻形勢著手，在實地調研的基礎上，結合相關的文獻和資料，從公路建設對經濟、社會發展的促進作用，公路建設佔用土地資源的特點，公路建設造成的水土流失對土地資源利用的危害等三個方面系統地分析總結了公路建設活動對經濟、社會與資源的影響，以引起社會各界對公路建設與土地資源佔用問題的重視；用成本-效益分析法對公路建設佔用土地資源的經濟合理性進行評價，並對公路建設佔地的社會效益進行分析，通過楊凌農業高新技術產業示範區三路一橋工程驗證它們的實用性。 -
As the application of rake receivers with multitaps is widely used in cellularcdma systems for exploiting path diversity, the closed - loop power control schemesshould make use of the multitap rake receivers for tracking the power variation dueto path loss, slow fading, and fast fading
同時，本文給出的自適應變步長閉環功率控制演算法利用rake接收機跟蹤通道的變化，與傳統的固定步長閉環功率控制相比獲得了較小的ebi0標準差。 -
The objective of the test process was to examine how the signal - path loss varied after exposure to different levels of vibration, and if discontinuities could be forced through long - term fretting wear or by unbiasing the spring contact with excessive shock
測試的目標是檢驗在施加不同程度的振動之後，信號路徑損失是如何變化的，以及是否會通過長期接觸磨損或通過用過度沖擊使彈簧不偏置而形成不連續性。 -
In order to utilize the frquency resource adequately and increase the capacity of mobile communication system, the wireless electric wave propagation of existing mobile system always adopts the microcell structure. forecasting the path loss characteristic of electric wave accurately can provide the necessary condition for the layout and design of wireless network, at the same time it is a precondition for the research on the microcell mobile system. the methods of forecasting of wireless electric wave propagation can divide into two parts : one is pluse and respond, that is establish the empirical model based on experimental and statistical data ; the other is ray tracing method, that is establish the deterministic model based on theoretical analyse. the paper discuss the characteristic of wireless signal electric wave transmition in symmetrical atmosphere of earth, and introduce the common path loss transmition model in land mobile communication system, also point out the localization of these models based on experiential methods
而精確預測無線電波傳播路徑損耗特性，則為合理的微蜂窩無線網路規劃、設計提供了必要條件，同時也是研究微蜂窩移動通信系統性能的前提。無線電波傳播預測的方法分為兩類：一是用沖激響應法，即根據實驗、統計所得數據建立經驗性傳播預測模型；另一種是用射線跟蹤方法，即依據理論分析來建立確定性的傳播預測模型。本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性，介紹了陸地移動通信系統中常用的幾種電波傳播路徑損耗經驗性預測模型，並指出了這些經驗性傳播模型對于微蜂窩小區無線電波傳播特性研究的局限性。 -
Accordingly ray tracing model for microcells propagation prediction has become an important subject. this paper discussed the characteristic of propagation in symmetrical atmosphere on the earth, and introduced several kinds of traditional path loss propagation model in land mobile communication system, also pointed out the localization of these models based on experiential methods
本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性，介紹了陸地移動通信系統中常用的幾種電波傳播路徑損耗經驗性預測模型，並指出了這些經驗性傳播模型對于微蜂窩小區無線電波傳播特性研究的局限性。 -
Modeling of propagation path loss in a canopy
樹冠中電波傳播路徑損耗的研究及模型的建立 -
The paper demonstrates the whole plan of the propagation model application software. with the delphi software, an application software including the function of the realtime calculating path loss value is compiled completely. the paper analyses the planning theory of the td - scdma network. its main aspects include the backbone of the network, the link budget report, the budget of the effective distance, the analyse of the link interference and the analyse of the system capacity
論證了td - scdma傳播模型應用軟體整體方案，利用delphi軟體編寫了具有校正功能和實時計算傳播衰耗值功能（與gps系統配合）的應用軟體。論文從理論的角度分析了td - scdma網路的規劃理論，主要從網路拓撲結構、上下行鏈路功率平衡預算報告、有效通信距離的估算、上下形鏈路干擾的分析和系統最大容量分析五個方面進行了論述。 -
Because it is a long time before the hybrid method getting the field, one can use the artificial net work ' s character of learning by itself, and get the law of the path loss. consequently, it become easier to study the wireless electrical wave ' s propagation characters
利用混合法計算場，比較耗時，可以運用人工神經網路的自學習功能，就能很快得出路徑損耗規律，從而更加方便對室內的無線電波傳播特性進行研究。 -
The second morning after he had decided to give up, the fellow practitioner who had introduced him to master s teachings and had led him onto the path of spiritual practice phoned him : " if you are determined to open the shop, there will be a solution. you should not give up easily. the problem now is not the broken cabinet glass, it s your loss of self - confidence
放棄開張的第二天一大早，介紹師父的教理並帶領我進入修行道上的同修來電話對我說：決心要開店，一定自有辦法，絕不能輕易放棄，現在問題不在玻璃櫥窗，而是你失去自信，唯有好好打坐，從心聆聽並實踐師父的教理，才是重要。 -
This text has counted the electric wave propagation path loss of street in one kind of typical rule range urban area, and reaches calculations data fairly with the measured data in the document. then calculate and analyze electric wave propagation ’ s characteristic in urban area. finally give an electric wave propagation prediction application example of column building model
本文最後計算了一種典型的規則排列得城市環境中街道得電波傳播路徑損耗，並與文獻中得實測及計算數據進行了比較，然後進一步對矩形、圓柱型建築物城市小區電波傳播進行了分析計算。 -
A simulation and modeling mechanism is studied and proposed for multirate transmission protocol. based on the wlan that adopts ofdm transmission technique, we first assumed that the small - scall fading and multipath in ofdm sub - channel is rayleigh, and large - scale path loss could be described by bi - linearity model, and then we analyzed the rationality
基於採用ofdm傳輸技術的wlan ，我們假設ofdm子通道的小尺度衰落服從rayleigh分佈，路徑損耗可以用雙線性模型描述，並對假設的合理性進行了分析，將決定速率切換的誤幀率等物理層性能參數和媒質控制協議有機地結合在一起，對多速率傳輸建模進行了有意的探索。 -
With path planning based on this model, the quality of local roads near the obstacles is improved, time consumption caused by the frequent collision - avoiding check is lowered, and the loss of feasible space is avoided
在此基礎上進行路徑規劃，提高了在障礙物附近產生的局部路徑的質量，減少了由於頻繁地執行避碰校驗所造成的時間消耗，並解決了可行空間丟失的問題。 -
And using the channels functional model, we develop a computationally efficient method to predict the path loss and multipath power requirement of diffuse links based on the locations within a room. and getting two characteristic parameters : optical path and r. m. s delay spread
並利用該漫反射模型，我們設計出一個有效的計算方法來預測紅外室內漫反射的路徑損失和多徑所需的最低功率，並成功獲得通道傳輸功率損失以及多徑時延擴展兩個參數。 -
The exact location of reflection and diffraction points is essential in order to calculate the polarization components of the reflected and diffracted fields and their trajectories. then, a vector addition of the received fields is carried out to obtain the total received field strength and, subsequently, the path loss along a predetermined route
該模型基於幾何光學理論、一致性幾何繞射理論和鏡像理論，通過大量的反射和繞射射線軌跡得出源點至場點的多條路徑，然後由矢量計算求出各場點處的路徑損耗。 -
Boslego said the 15 years it normally takes for a newly - developed vaccine to reach people in the developed world was too long, and that path wanted to fast - track research with the help of the five - year grant. pneumococcal disease leads to pneumonia and middle - ear infections that can lead to hearing loss, and may also cause life - threatening infections of the bloodstream and nervous system including meningitis
博斯萊戈還指出，一種新開發出的疫苗通常需要花上15年時間才能在發達國家內得到普遍使用，這一過程實在是太漫長了， path希望藉助比爾蓋茨基金會這筆為期5年的捐款來加快疫苗的研製工作。 -
Then critical technologies of simulation system are discussed, including frame processing structure, fh sequence generator, simulation models of path loss and multipath channel, simulation of signal propagation delay and jamming signal etc
其次，討論了模擬系統實現的關鍵技術，包括幀處理結構、跳頻序列發生器、路徑損耗與多徑通道模擬模型、信號傳播延時及干擾信號的模擬等。 -
Sky - wave path loss
天波路徑損耗 -
A quasi - three - dimensional propagation model has been presented for path - loss prediction in a typical urban site, based on ray tracing with quad - tree method of subarea. the model takes into account numerous rays that undergo reflections from ground and wall surfaces and diffraction from corners or rooftops of buildings
在總結前人工作的基礎上，本文採用四叉樹分區法建立了一種準三維電波傳播模型，並以vc + + 6 . 0作為編程平臺實現模擬。 -
Chapter 3 investigates the capacity improvement in cdma multi - cellular system with base - station smart antenna. we consider the effects of multipath interference, thermal noise, path loss, processing gain and voice activity factor. and introduces multiuser detection combined with smart antenna
考慮了多徑干擾、熱噪聲、路徑損耗、處理增益和語音激活因子的影響；並介紹了與智能天線技術相結合的多用戶檢測技術。 -
Detailed depict of the influence to the system which cause by path, parameters to the multi - path are provided. discussed the path loss of the system and how to improve the system performance. 2
介紹多飛行器測控系統的通道特徵，描述了通道對系統的各種影響和多徑通道的各種參數，並討論了小衛星通道的干擾問題及其解決辦法。
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