糙率比 的英文怎麼說
中文拼音 [cāolǜbǐ]
糙率比
英文
roughness ratio-
It was specially pointed out that, when the tail water is constant maximum tide, the computed flood surface is higher than that of nonsteady current, so there is some safety superelevation. underestimation of the roughness will make downward bias to compute along - river surface and bring hidden trouble for flood control. to improve the section can decrease the water level or offset the water rise for increase of floodplains " roughness, but it need much engineering works
特別提出，按照恆定流計算出來的設計水位比非恆定水位具有一定的安全儲備；而對于灘地糙率的低估又會造成設計水位的偏低，給防洪工作帶來隱患；如果利用改進斷面形式來降低水位或彌補糙率增加帶來的水位抬高，需要較大的工程量，所以平時應注意灘面的減糙管理工作。First we compare rough sets and random sets, and derive the relationship between belief function and lower probability
首先將粗糙集與隨機集作了比較，並由此得出了信任函數與下概率的關系。Firstly, we account for the former made and the sand selected are reasonable by experiments. then we develop the first project carrying the experiment for filling up of 30 years. contrasted with the count, the results have no difference, we carried two experiments under different water levers by the actually facts if engineering work in early days. by the result, we know that the gross of fill up have no difference
本文從白石水庫泥沙模型試驗入手，模型試驗首先通過模型糙率和模型選沙驗證試驗，說明模型製作和選沙是合理的；然後開展初設方案30年運用水庫淤積試驗，並與數模計算對比，基本相同；試驗結合工程初期運用實際情況，進行了兩個不同初期運用水位方案的對比試驗，從兩個方案試驗結果看，初期運用的兩個方案淤積總量差別不大，而從效益看，方案二優于方案一。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The yellow river water environment information management system is a computer network system covering the whole basin, the construction of which includes a computer network construction and software development. the software involves database, gis, and man - machine interface. the investment in the system is huge and the period of construction is long, thus, a good design is very important. the design schemes are summarized in this paper. according to the present computer technology, some new methods used in network design and software development are introduced, and it is suggested that expandability and opening of the system should be considered in system construction
黃石?水電站輸水渠道地處地質結構比較復雜的地方，由於渠道建成投運的時間較早，且原設計的標準較低，糙率較大.在電站機組已更新改造的情況下，若不進行輸水渠道挖潛改造，已難于滿足電站機組的設計流量要求.經反復比較，決定採取減小渠道糙率的方案，對輸水渠道進行三面光護面加固防滲，增加過流，效果很好Abstract : in light of thicker grain and smaller viscosity of debris flow, a segmented simulation of the debris flow with flume is presented. for the first time. more difficult resistance similarity is brought about by geometric rate without excessive coarsing and discontinuous similarity of sand grain composition in model is eliminated with different grain scale. on this basis the density similarity and sand conveying similarity are achived. the method presented is verified through a model test case
文摘:針對水石流顆粒粗，粘性小的特點，提出了利用水槽進行分段模擬水石流的設想，首次通過幾何變率解決難度較大的阻力相似問題，改變了以往過度加糙的方式;通過變粒徑比尺的方法消除了模型沙級配不連續相似的問題，較好地實現了固體物質級配相似，達到了泥石流的密度相似和輸沙相似.通過水槽概化模型試驗實例，對本方法進行了驗證The results show that, when increasing the feed rate of the grinding wheel, decreasing the rotating speed of the wafer chuck table and using coarser grit grinding wheel, the material removal rate in the wafer rotating grinding increase, the feed rate of the grinding wheel has greater influence on the material removal rate ; when suitably increasing the rotating speed of the grinding wheel, decreasing the feed rate of the grinding wheel and using finer grit grinding wheel, the wafer surface roughness can be reduced ; there exists a critical rotating speed of the grinding wheel ( about 2300rpm ), beyond which the material removal rate evidently decreases and the spindle motor current and wafer surface roughness steeply increase ; when the grit size of the grinding wheel is finer than # 2000, the material removal rate decreases and the wafer surface roughness has no obvious improvement
研究結果表明，增大砂輪軸向進給速度和減小工件轉速，採用粗粒度砂輪有利於提高磨削矽片的材料去除率，砂輪軸向進給速度對材料去除率的影響最為顯著；適當增大砂輪轉速，減小砂輪軸向進給速度，採用細粒度砂輪可以減小磨削表面粗糙度；在其它條件一定的情況下，砂輪速度超過一定值會導致材料去除率減小，主軸電機電流急劇增大，表面粗糙度變差；採用比# 2000粒度更細的砂輪磨削時，材料去除率減小，矽片表面粗糙度沒有明顯改善。We can prove from the result of experiment that the web text mining approach could be more efficient than other classification algorithms whatever in precision, recall rate, or in novelty of knowledge. moreover, the technology is language independence
從實驗結果看，基於粗糙集的web文本分類演算法無論在分類精度、分類效率，還是知識的新穎程度方面，都比以往分類演算法有明顯提高；而且，這種技術是語言獨立的。Both the tide and the increase of floodplains " roughness can change the diffluence ratio between northern and southern branch
外海潮波和灘地糙率的變化可以影響南北兩汊河道的分流比。Larger loading capacity under the same specification ; easily establishing lubricant oil film, smaller friction coefficient, higher transmission efficiency, saving energy ; highest accuracy up to grade 3 of din standard ; smoother functioning, lower noisiness and longer service life
平麵包絡環面蝸桿與普通圓柱蝸桿傳動相比具有更大的承載能力，易於建立動壓油膜摩擦系數小，傳動效率高節省能源具有可磨削性，能達到din標準三級，面粗糙度優于ra0 . 4而且具有運行平穩噪音低壽命長等優點。Analysis and comparative of rough - set theory and principal components analysis to double allele frequency
粗糙集聚類分析與主成分分析法對雙等位基因頻率的分析與比較In traditional low bit - rate speech coding, considering that ears are not sensitive to phase information, the phase information is often neglected, and this will result in coarse and harsh speech quality, and it even may lead to inflection in pitch
在傳統的低比特率語音編碼中，考慮到人耳對相位信息不敏感而經常忽略相位信息，這將導致語音粗糙、刺耳甚至音調發生改變。為了獲得高質量的聲碼器，語音的相位信息是不能不考慮的。2. methods in frequency domain : through a comparative study, wedge and ring feature of fourier transform performs better than other features based on texture spectrum. it represents the directivity, coarseness and regularity of an image
在基於頻率域的紋理分析方法中，分析了基於傅立葉變換的紋理分析方法，經兩組對比實驗，楔環特徵能夠很好的反映圖象紋理的方向性、粗糙性和規律性，在檢索中明顯優于基於頻譜的簡單統計特徵。4. after having made a survey of ultraviolet spectrum, infrared spectrum and raman scattering spectrum at different silver - doped rate and compared the theoretical compute with the experimental values in references, we confirm that our new method of the preparation and purification of c60 is reliable and efficient
本文對銀摻雜c60薄膜的粗糙化機理作了理論解釋; 5 .測量得到了不同的銀摻雜比率下薄膜的紫外一可見光譜、紅外光譜和拉曼散射光譜，通過對比理論計算和文獻中的實驗測試值，驗證了我們改進后的c6 。Compared with natural aggregate, the accumulation density of recycled aggregate is lower, the water absorption is higher, the surface is rougher and the crush index is greater, the performance of concrete changes evidently
再生骨料與天然骨料相比，堆積密度小、吸水率高、表面粗糙且壓碎指標大，對再生混凝土性能影響明顯。分享友人