particle n. 1.顆粒,微粒;微量,極少量。 2.【物、數(shù)】粒子,質(zhì)點。 3.【語法】虛詞,不變詞〔冠詞、副詞、介詞、連接詞、感嘆詞等〕;小品詞 〔yes, no 等〕,詞綴。 4.〔古語〕(文件中的)條,項。 5.【天主教】一小片圣餅。 He has not a particle of sense. 他一點腦子也沒有。 fundamental [elementary] particles 【物理學(xué)】基本質(zhì)點,基本粒子。
Natural sediment particles are not spherical . 天然泥沙顆粒不是球狀的。
The size of a sediment particle alone is usually not sufficient to describe it . 單顆泥沙的粒徑通常不足以描述其性質(zhì)。
Study on soil and sediment particle size distribution and nutrient loss 土壤及泥沙顆粒組成與養(yǎng)分流失的研究
Experimental study on effect of positively charged ion in river on the velocity of sediment particles 陽離子濃度對泥沙沉速影響實驗研究
Effect on the flocculation sedimentation velocity in different conditions of cation concentration by concentration of sediments particles 不同離子濃度下泥沙濃度對絮凝沉降的影響
The floe settling velocity of sediment particles is taken as the function of current velocity , salinity and suspended sediment concentration 泥沙顆粒絮凝沉降速度考慮了流速、鹽度、含沙濃度的影響。
Real - time surface velocity field measurement system and three - dimensional particle velocity measurement system are developed . systematic experimental research on the movement of coarse sediment particles in open - channel flows was carried out using developed system 本文研制開發(fā)了表面流場實時測量系統(tǒng)和顆粒三維運動測量系統(tǒng),并采用顆粒三維運動測量系統(tǒng)對明槽水流中粗顆粒的運動進行了系統(tǒng)的試驗研究。
Based on the analysis of characteristics of sediment particle concentration distribution , it is pointed out that the diffusion theory can describe sediment concentration distribution in main flow region but cannot explain sediment concentration distribution law near bottom because of the existence of sediment colliding shear stress 摘要在分析泥沙顆粒含量分布特性的基礎(chǔ)上,指出擴散理論能較好地描述主流區(qū)的泥沙含量分布規(guī)律,但在近底流區(qū)由于泥沙碰撞切應(yīng)力的存在,使得擴散理論不能解釋此區(qū)域的泥沙含量分布規(guī)律。
Based on the topographic features and data of sediment particle size of bed load at the fluctuating backwater reach of liujiaxia reservoir , the streamwise variation and variation process of median diameter of bed load during silting and scouring periods of the fluctuating backwater reach are analyzed , and it can be seen that the turning point for the sediment diameter variation from coarse to fine is located at the outlet of shigou gorge of the fluctuating backwater reach 摘要根據(jù)劉家峽水庫變動回水區(qū)的河段地形特征和歷年河床質(zhì)泥沙粒徑級配資料,分析了變動回水區(qū)河段淤積和沖刷時,河床質(zhì)泥沙中值粒徑的沿程變化和歷年河床質(zhì)泥沙中值粒徑變化過程,并指出粒徑分布由粗變細的轉(zhuǎn)折點在變動回水區(qū)寺溝峽峽口處。