For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics
利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性,建立了半
經驗植被雷達後向散射模型; 2 ) .研究發現在農作物等矮小植被覆蓋地表,植被層直接後向散射與植被類型相關,且在植被生長期,雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ) .解決了單參數雷達地表土壤水分反演問題中,雷達入射角和地表粗
糙度的影響這一難點問題; 4 ) .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ) .在以上成果基礎上,建立了完整的單參數雷達地表土壤水分變化探測反演演算法,
經地表驗證,模型反演地表土壤水分變化值的精度為rmse = 0
Simply operation mode, increased hoister, high efficiency stoner, steady presser sheller, super capacity paddy separator and strong function of rice miller ensuire this equipment a leading status among middle and small unit, indicate that currently it ' s the preferred equipment to the middle and small food - processing corporation in domestic
其簡單方便的操作模式,加大流暢的提升機,高效寬大的清雜去石機,衡壓無油的壓鉈礱谷機,超大處理量的谷
糙分離機和性能強大穩定的碾米機等保證了該設備在中小型機組中獨領風騷的地位,
經廣泛的市場信息反饋表明其是當前國內中小糧食加工企業的首選機型。
We did not come to the world of gold at once, however. on our way, we passed through many realms and saw many things - a fairy peach garden, an old man with a big head, white beard and cane, the dimension of large buddhas, and a world of little dwarfs. in the hierarchy of the universe, the higher the dimension, the more transparent it is and the more brilliwer realms are coarser, and by comparison, we can say that the earth is a rather turbid planet
對了,師父帶我上去時,也不是一下子就到達金色的世界,其中
經過很多不同的世界,有蟠桃園以及頭很大白鬍子拿?杖的老公公的世界,有大佛與小小人的世界,在整個宇宙的層次來說,大概是越上面的境界的光越強越透明,慢慢下來的境界就越來越粗
糙,所以地球真的算是比較濁的星球。
Ceramic grain filters ard made of refined pottery clays added with certain modifiers, and processed of grinding, mixing, shaping and high temperature sintering. they do not contain any substances that harmful to people or environment. they are hard and rough in surface, porous inside the structure, and have the advantages of high mechanical strength, large specific surface area and porosity. when used in water treatment, they behave a activated surface property, a great amount of pollutant entrapment, less water head loss in the filter bed, lower consumption of back - flush water, stable in chemical and gbiologic property, and long service life, ceramic grain filters is a new and efficient filter material to increase the water yield, upgrade the water quality, and save chemicals and energy
陶粒濾料是以精製陶土為主要原料,摻加適量改性劑,
經粉碎,混練,成型和高溫煅燒而製成的,不含任何對人體和環境有害的物質.其表面堅硬,粗
糙,內部疏鬆,多孔,具有機械強度高,比表面積大,孔隙率大的特性.用於水處理中,具有表面性狀好,截污能力強,過濾水頭損失小,反沖洗耗水量低,化學穩定性和生物學穩定性好,使用壽命長的特點.陶粒濾料是一種能增加水產量,提高出水質量,節省藥劑和能耗的新型高效過濾材料
In the turbulent flow, the fluid ’ s physical parameters has the stochastic change along with the time and the space, it is very difficult to carries on its rate process ’ s precise computation and the simulation with mathematics method, but unstable condition navier - stokes equation regarding open canal current of water transient motion suitable
閘后水流
經過加
糙的海漫段時,其水流狀態屬明渠紊流。流體中的各種物理參數,都隨時間與空間發生隨機的變化,很難用數學的方法對其運動過程進行精確計算和模擬。
What has been included in our active norm is still prescribed - based code, that is the method based on volume change times, which has fallen into disuse in development country and has been proved to be so simple and inaccurate as to lead to great mistake sometimes
而我國目前在該領域的研究尚處于起步階段,現行的規范中仍採用已
經被發達國家淘汰的「處方式」的設計方法:體積換氣次數法,該方法已被證明過于簡單、粗
糙,有時甚至導致錯誤。
It is found that ito surface roughness decreased after oxygen plasma treatment, which can improve its wetting performance and consequently improve the film performance
經氧等離子體處理后, ito薄膜的表面粗糙度減小,平整度提高,提高了ito薄膜表面的潤濕性能,改善了有機物在其表面的成膜性能。