勻地播種 的英文怎麼說
中文拼音 [yúndebōzhǒng]
勻地播種
英文
sowing of evenland-
A crop can be sown, weeded, irrigated, and fertilized uniformly.
一種作物可以均勻一致地進行播種，除草，灌溉和施肥。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。Because of the complekity of the sallce of theng field, at present the quality of seedng on the conservation tillape land is lower than tradihonal hllage land, distanee between seedlings being not whfonnly, occurring absent seeding and even whole absent rows of seedings
由於保護性耕作地面的復雜性，目前玉米免耕精播機播種質量仍遜于常規播種，株距不勻、漏播、甚至因堵塞整行漏播的情況時有發生。Sow the seeds on the surface of organic fertilizer equality, sprinkle once, let the seed absorb water enough. put the cover of casing on the container, displace to the shade
將種子均勻地撒播於培養土表面，水澆灑一次，讓種子吸飽水份。將包裝封面蓋在容器上，移置蔭涼處。With these three calculated parameters, the attenuation factor value of the radio wave propagation in the earth ' s crust is calculated by the ways of plane wave method and communication formula method, and the value of the leakage on the ground is also calculated by the inhomogeneous medium ' s field analysis method
據此三種參數，利用平面波法和通信公式法計算出電波在地殼中傳播的衰減因子值，以及利用非均勻介質的場分析法計算出地面場強泄露衰減因子值。分享友人