雨衰減 的英文怎麼說
中文拼音 [yǔshuāijiǎn]
雨衰減
英文
attenuation by rain-
Hydrometeors have dominant effect on the performance of systems operating at frequencies above loghz, and the remote sensing of hydrometeors is an important subject for radio propagation, radar meteorology and atmosphere physics etc. based on the physics characteristics of rainfall, fog and clouds, the propagation characteristics and remote sensing of hydrometeors are investigated and discussed
水凝物是影響10ghz以上頻段系統性能的主要因素，它是電波傳播、雷達氣象、大氣物理和環境遙感等學科研究的重要對象。本文基於降雨和雲霧的基本物理特性，對降雨和雲霧的毫米波傳播特性、降雨和雲霧的遙感以及霧的紅外輻射衰減特性進行了分析和研究。The study shows that the early and late seed rains of constructive tree species in evergreen broadleaved forest at chongqing simian mountain had no activity. the bigger the seeds of the species and the earlier or later the seeds of the species matured, the higher the proportion of the seed rain damaged by animals. the quantitative variation of seed rain, active seed rain and seed bank did not take place at the same time. at early time, the number of seed banks of castanopsis fargesii, lithocarpus glabra, quercus myrsinrefolia, castanopsis plasyacantha, cinamomum subavenium. which own more active seed rain increased by geomitric series. the seed banks of castanopsis orthacantha and schima argentea were small, only survived a short time, and did not sprout next year. the quantitative dynamics of seed banks and their increasing or decreasing rates were decided by the proportion damaged by animals, dying speed of seeds and their resistance to pathogens and adverse circumstances, and the state of seed germination
對重慶四面山常綠闊葉林建群種種子雨、種子庫的研究表明，建群種早期和晚期的種子雨無活力;種子偏早或偏晚成熟及大籽粒的樹種，其種子雨被取食的比例大;種子雨、有活力種子雨、種子庫三者的數量變化不一致;有活力種子雨量較大的栲、石櫟、小葉青岡、扁刺栲、香桂等，其種子庫密度在早期以近幾何級數的方式增長，元江栲、銀木荷種子庫小，存在時間短，翌年無一年生萌發苗;種子庫數量動態、消減率動態決定於種子被取食的強度、種子衰老的速度以及種子對病菌、逆境的抗性和種子萌發的整齊性In this paper, firstly, by means of analyzing some rain attenuation experimental results, the raindrop size distributions applied to various climatic regions in china, are discussed
首先通過分析雨衰減的一些實驗結果，討論能用於中國各氣候帶的雨滴譜。The prediction methods of rain attenuation for design of terrestrial and earth - space systems are also introduced
文中還介紹了用於系統設計的雨衰減預報方法。At short microwave and long millimeter wave bands, the ratios of the rain - induced attenuation on up - link to down - link are estimated on earth - space slant paths. a comparison of the prediction results with the experiment data in boston and kashima areas is carried out
在微波和毫米波低端，預測了地一空路徑上、下行鏈路雨衰減的比率，並與美國波士頓和日本kashima地區的實驗數據進行了比較，結果一致性較好。Using the dsd models and forward scattering amplitude computed by the least squares fitting method, the specific attenuations at l - 400ghz have been computed and analyzed, the parameters of " power law " relation between specific attenuation and rainfall rate are obtained. the specific attenuations in qingdao, guangzhou and xinxiang are compared with itu - r specific rain attenuation models
利用平均雨滴尺寸分佈和點匹配法計算的雨滴的前向散射數據計算和分析了青島、廣州和新鄉地區1 ? 400ghz特徵雨衰減特性，得到了特徵雨衰減與降雨率的指數關系參數，並與itu - r （ internationaltelecommunicationunion - radiocommunication ）特徵雨衰減模式進行了系統的比較研究。The analytic specific attenuation model for rain for use in prediction methods are developed, the specific rain attenuations calculated by the analytic model are in high agreement with those by the parameters tabulated in itu - r model, this model has presented to itu - r as a proposed revision to current itu - r model
基於itu - r特徵雨衰減模式的列表參數，提出了特徵雨衰減的解析模式，該模式計算的特徵雨衰減與itu - r模式列表參數計算結果間有很好的一致性，並提交itu - r作為國際標準審議。The specify attenuation, attenuation and scattering impairment of a melting layer have also been predicted at various rainfall for 6, 10, 20, 30ghz. the results calculated show that the attenuation due to melting layer are more than the attenuation induced by the identical thickness rain
在6 、 10 、 20 、 30ghz時，計算了不同降雨率融化層的特徵衰減、衰減和散射損耗，結果表明融化層的衰減較同厚度雨區的衰減為大。Methods for calculating attanuations by atmospheric gases and rain in the satellite communication link
衛星通信鏈路大氣和降雨衰減計算方法分享友人