On the basis of theory analysis , the average transmitted light intensity ( correspond to dc value ) was determined as characteristic parameter of raw water using photoelectric method for monitoring the fluctuation of transmitted light and photometric dispersion analyzer ( pda ) . the dc value was closely related to both particle concentration and surface area of sand clay simultaneously . the experimental results shows that there is an exponential function relation between dc and surface area of sand clay in unit volume water ( sp ) : dc = asbp in which a and b are empirical coefficients . then the formula of macromolecule flocculant dosage is found to be d = f ( dc ) = e ( dc ) f in which e and / are empirical coefficients and the average correlation coefficient equal to 0 . 981 . so the model of automatical control system of water treatment plant was established using the formula 应用透光率脉动检测技术和光散射颗粒粒度分析仪( pda ) ,通过理论分析,将pda的输出信号之一? ?平均透光强度(对应于dc值)作为原水的特性表征参数, dc值可以同时反映颗粒浓度和比表面积因素的影响,试验结果证明, dc值与单位体积水中泥沙颗粒总表面积s _ p之间具有很好的幂函数关系: dc = cs _ p ~ d ,式中c 、 d为经验系数,进而得到了以dc值为参数的高分子絮凝剂投药量公式: d = f ( dc ) = e ( dc ) ~ f ,式中: e 、 f为经验系数,平均相关系数达0 . 981 ,利用所建立的公式,建立了前馈? ?后馈联合控制的在线自动投药模型。
sand: n. 1.沙。 2.〔 pl. 〕 沙滩,沙洲,沙地,沙 ...clay: n. 1.黏土;泥土。 2.(相对于灵魂而言的)人体,肉 ...clay sand: 带土砂; 粘土砂; 粘性砂; 粘质砂土; 黏土砂sand clay clay: 用沙纸磨clay and sand mixer: 土砂拌和机clay-lime-sand mixture: 土灰沙三和土contain a lot of sand and clay: 含有大量的沙子和粘土disseminated clay sand: 浸染的粘土质砂gravel-sand clay: 含砂砾粘土mixture of sand silt and clay: 砂粉砂oiled sand-clay: 拌油砂土organic clay sand: 有机质泥砂sand clay base: 砂粘土地基sand clay loam: 砂质粘壤土sand clay road: 砂土路sand-clay base: 砂质粘土地基sand-clay interface: 砂与粘土界面sand-clay matrix: 砂土结合料sand-clay surface: 砂泥路面clay: n. 克莱〔男子名,Clayton 的昵称〕。 n. 1.黏土;泥土。 2.(相对于灵魂而言的)人体,肉体;资质,天性。 3.陶制烟斗 (=clay-pipe)。 4.黏土状物。 potter's clay陶土。 porcelain clay瓷土。 a man of common clay普通人,常人。 a yard of clay 陶制长烟管。 as clay in the hands of the potter 要捏成什么样就是什么样;听凭摆布。 dead and turned to clay 死。 feet of clay 泥足〔象征站不住脚的事物〕。 moisten [soak, wet] one's clay 饮酒。 adj. -ish 黏土(多)的;黏土似的;泥质的。 on clay: 拌土in the sand: 不敢面对现实; 在沙子里it (sand it): 沙嘴it(sand it): 沙嘴sand: n. 1.沙。 2.〔 pl. 〕 沙滩,沙洲,沙地,沙漠。 3.〔 pl. 〕 沙粒;(计时用的沙漏中的)细沙。 4.光阴,时间,寿命。 5.〔美俚〕勇气,毅力,胆量,坚毅。 6.【医学】砂状结石。 7.【地质学;地理学】含石油砂层。 8.粗矿石;尾矿;【冶金】模砂。 9. 砂色;带红的黄色。 10.〔美俚〕砂糖。 quick sand 流沙。 play on the sands 在沙滩上玩耍。 The sands [His sands] are running out. 期限快到[他的命数将尽]。 a man with plenty of sand in him 坚毅的人,刚强的人。 built on sand 不稳固的;不安定的。 footprints on the sands of time 留在人世变迁的沙滩上的脚印。 have sand in one's craw 〔美口〕有勇气[决断,毅力]。 knock the sand from under 〔美国〕使失去立足之地;(设法)占上风。 make ropes of sand 用沙结绳;做不可能[徒劳无功]的事。 numberless as the sand(s) 多如恒河沙数。 number [plough, sow] the sands 白费气力,徒劳。 put sand in the wheels [machine] 捣乱,暗中破坏。 vt. 1.撒沙于,铺沙于,把…埋进沙里,用沙搀入。 2.用沙[砂纸]擦[磨光]。 3.使(船)开上沙滩。 sand up 用沙填塞(油井等)。
sand clay meaning:[Architecture] A mixture of sand and clay in which the two materials have been blended so their opposite qualities tend to maintain a condition of stability with various moisture contents. sand clay перевод:1) супесь, песчаная глина