均勻播種 的英文怎麼說
中文拼音 [jūnyúnbōzhǒng]
均勻播種
英文
uniformity of distribution of seed-
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。Analysis of influence factor on seeding uniformity of model 2b f - 8 wheat precision planter
8型小麥精播機播種均勻性影響因素分析Three finite - difference methods, i. e., stagger grid, implicit and explicit algorithms, are analyzed in detail. multi - grid algorithm is firstly introduced in elastic wave simulation, to solve for the stability problem inherent in stagger grid and implicit algorithm, also for the efficiency problem inherent in explicit algorithm, and the precision, stability and efficiency for simulation of elastic wave arc increased by multi - grid method. phase - delay method is provided to effectively absorb boundary reflection and increase efficiency for wave motion simulation, based on phase delay and amplitude decaying features along wave propagation
在水平分層介質接收函數的波形反演研究的基礎上,本文系統闡述了非均勻介質中彈性波傳播數值模擬常用的三種有限差分方法:顯式差分、隱式差分和交錯網格法,首次將多重網格演算法應用於彈性波方程的數值模擬問題,克服了交錯網格法和顯式差分法穩定性差,以及隱式差分法計算效率低的缺點,大大提高了彈性波數值模擬的精度、穩定性和計算效率。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。Precision seeding will help us to save labor and seeds, to enhance labor effeetiveness and to increase 3deld by evenly placing seeds
精密播種不僅能節省勞動力,節約良種,還能提高勞動生產率,使種子均勻分佈,有利於作物生長,增加產量。In this paper, a new heterogeneous anisotropic constitutive model of fractured media was presented, and the properties of elastic waves excited from a two - dimensional ( 2d ) point source propagation in 2d fractured rocks were investigated by the pseudo - spectral method ( psm )
本文提出了一種新的非均勻各向異性隨機裂縫介質本構模型,用偽譜法模擬了二維點源產生的彈性波在二維復雜巖石中的傳播。Design of monitor on seeding uniformity of wheat precision planter
小麥精播機排種均勻性檢測裝置的研製Design of monitor for seeding uniformity of wheat precision planter
小麥精播機排種均勻性檢測裝置的研製Seeding uniformity is an important factor to evaluate performance and quality of seeders
播種均勻度是衡量播種機性能與質量的重要指標。There are several problems in scalable and reliable multicast, such as, feedback implosion and local recovery, etc. aim at to solve the problem of feedback implosion, we discuss carefully how to set the timer to avoid the nack implosion in receiver - initiated, integrate fec system. we propose two methods : divided time equally and based on exponential distribution to set timers, divided time unequally and based on exponential distribution to set timers. by analyzing for up to 10 receivers, both of them can avoid the nack implosion and feedback delay due to timers is low
在可伸縮可靠多描通信中存在反饋信息爆炸、局部恢復數據困難等問題,為了解決反饋信息爆炸的問題,本文針對基於接收者啟動、使用集成fec的系統,詳細討論了如何使用定時器避免nack爆炸,提出了設置定時器時間的兩種方法:基於指數分佈、均勻分段方法和基於指數分佈、非均勻分段方法,並且分析了它們抑制nack的能力和由定時器引起的nack延時長短,通過分析可知:對接收者數量達到10 ~ ( 10 )數量級的多播通信,這兩種方法都能避免反饋信息爆炸,且由定時器引起的nack延時短,並且后一種方法優於前一種方法。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