water use ratio 中文意思是什麼

water use ratio 解釋
蒸騰率
  • water : n 1 水；雨水；露；〈常作 pl 〉 礦泉，溫泉；藥水。2 〈常 pl 〉水體；水域；水道；海；湖；河；海域；...
  • use : n 1 使用，利用，應用；使用的機會[需要]。2 使用的能力。3 使用的自由，使用權。4 使用法。5 用途；效...
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. A complex mixed - phase explicit microphysical parameterization scheme, which also be known as reisner 2 explicit scheme was developed for use in the ncar / penn state mesoscale model versions ( mm5 ). the single - moment schemes has additional variables for graupel and ice number concentration, in which the mixing ratio of cloud water, rain water, cloud ice, snow and graupel are predicted and number concentration specified

    Mm5中的reisner2方案是一種含霰的復雜混合相顯式雲物理方案，該方案包含了雲水、雨水、冰晶、雪和霰的混合比預報方程，同時對冰晶的數濃度作了預報。
  2. Abstract : the qiantang estuary with violent hydrodynamic conditions is well known for its tidal bore. the regulation of the estuary in the past, especially the progress since the founding of new china are reviewed. the principles of the regulation and planning of the qiantang estuary formulated in 1960s are expounded, i. e., to narrow the river to reduce the tidal prism, and to increase the ratio of the river flow to tidal discharge. the experience of estuary regulation / reclamation is summarized, especially the engineering measures to protect the groin head and to use polder dykes as sea defense works. finally, the effect is analyzed of the large - scale constraction / reclamation in the estuary on the tides, flooding high water level, estuary bed and the northern deep waterway in the hangzhou bay

    文摘:以涌潮聞名的錢塘江河口，動力強勁，破壞力極大.回顧錢塘江河口歷代治理情況，重點記述1949年以來治理工作的進展，論述60年代提出的錢塘江河口治理規劃的指導思想，即縮窄江道，減少進潮量，增大山潮水比值的整治原則.總結整治規劃實施過程中治江圍塗經驗，特別是「以圍代壩」和丁壩壩頭保護等工程措施.分析錢塘江河口大規模治江圍塗后對錢塘江河口潮汐、洪水位、河床以及杭州灣北岸深槽的影響
  3. A study comparing water use efficiency and root shoot ratio of alfalfa and astragalus adsurgens at seedling stage

    苜蓿和沙打旺苗期需水及其根冠比
  4. In the fourth chapter, the effect of controlled alternative furrow irrigation on the ratio of root to shoot, filling rate, leaf physiological indexes, yield and water use efficiency of summer maize were discussed, and the lower limits of suitable irrigation for summer maize in controlled alternate furrow irrigation were analyzed and determined

    29 ，表明干濕交替循環不僅可以減少每次灌水間隔期間的棵間土壤無效蒸發，而且也抑制了作物的奢侈蒸騰，因此作物需水量明顯減少，節水效果非常顯著，被證明是溝灌方式中最科學的一種灌水方法。
  5. Aim to analyze the problems in the course of the exploitation and utilization of water resources and offer some references to the sustainable utilization of water resources in baoji city, shaanxi, china in the future. methods beginning with the restrained factors that affects the sustainable exploitation of water resources, the main problems is systematically analyzed that exposed in the course of the exploitation and utilization of water resources : utilization ratio of water resources is low, water waste is serious ; groundwater is exploited excessively, water level drops continuously ; water pollution is serious, water quality worsens obviously ; management system of water resources is imperfect, the facilities of irrigation works wear out seriously. results it is suggested that pursue saving water all - round to build a water - saving society, and perfect the paid - use system of water resources to implement the industrial management of water resources, and strengthen the protecting consciousness of water resources together with controlling groundwater exploitation strictly, and increase the fund investments to enhance the irrigation works abilities of adjusting, holding and preventing the flood, and strengthen the network management of water resources besides improving the official specialized quality. conclusion the reasonable exploitation and utilization of water resources plays a key role in the sustainable development of economy and society in baoji city, shaanxi, china

    目的分析寶雞市水資源開發利用中存在的問題，為今後水資源的可持續利用提供參考依據.方法從影響寶雞市水資源可持續利用的制約性因素入手，系統分析了在水資源開發利用中存在的主要問題:水資源利用率低，浪費嚴重;地下水開采過度，水位持續下降;水污染嚴重，水質明顯惡化;水資源管理體制不健全，水利工程設施老化嚴重.結果提出了相關的解決對策:全面推行節約用水，建立節水型的社會;完善水資源有償使用制度，實現水資源的產業化管理;強化水資源保護意識，嚴格控制地下水開采;加大資金投入力度，提高水利工程的調蓄防洪能力;加強水資源網路化管理，提高管理人員的專業素養.結論水資源的合理開發和利用是實現寶雞市經濟社會可持續發展的關鍵
  6. Finally, use spss analyzing experiment data, the most suitable mix design was gained, and an experience expression about material strength and cement / water ratio was found

    通過對試驗數據的分析，給出了最優配合方案，利用spss驗證經驗公式，給出了高強水泥基材料強度與膠水比的經驗公式以及抗折強度與抗壓強度之間的線性關系。
  7. Based on the principle of fuzzy, utilizing the comprehensive evaluation model of limit analysis on the development of water resources, the authors selected evaluation factors include irrigation ratio of total land, coefficient of product water, degree of water exploitation, water supply and demand modulus, per capita water supply and ecological water use ratio to analyze

    摘要基於模糊數學理論的區域水資源開發利用閾分析方法，選取灌溉率、產水系數、水資源開發程度、供需水模數、人均供水量和生態用水率7個主要因素作為評價因素，以杭州市區為例進行具體計算與分析。
  8. This butch of beams use 525 # common portland cement, the water - cement ratio is 0. 53, the design strength is c35. lt is cut apart to 150x 150x 150mm3 cube with cutter

    該批混凝土梁採用525 』普通硅酸鹽水泥，水灰比為0 53 ，設計強度為c35 。用切割機切成150x150x150mm 』的立方體，測得其立方體抗壓強度為41
  9. The ratio of isopropyl alcohol and pure water and temperature in the process of freezing are considerated in the research of the preparation of the pt / c electrocatalysts with freeze - drying method. the result shows, when we use 300ml pure water to wash the carbon ( 40mg ) in isopropyl alcohol ( 20ml ) to alter the ratio of isopropyl alcohol and pure water, we get the electrocatalysts with high catalytic activity ; the use of the liquid nitrogen ( - 196 ) to freeze the suspension ( carbon and precursor solution ) can make the pt / c electrocatalysts in high dispersion

    採用300ml純水對20ml異丙醇中的40mg碳載體進行洗滌抽濾，來改變預凍液中的醇水比例，通過冷凍乾燥制備pt / c的性能較好;採用液氮對預凍液進行冷凍（預凍溫度為- 196 ）制備的pt / c催化劑性能較好;冷凍乾燥法可以有效地避免加熱乾燥過程中前軀體離子在碳載體表面的脫附和團聚，進而制備載量大、分散性好、粒徑較小的pt / c催化劑。
  10. As part of the nationa1 " 9 ' 5 " key project ( no. f 96 - a23 - 02 - 010 ) on instrumentation supported by the ministry of science & technology ministry this study took the behavior of soil - water - system dielectrics as a key point for further development and evaiuation of a new kind of standing wave ratio ( swr ) soil moistufe measuring system. a series of academic analysis and a lot of experiment research on swr4ased soil moisture sensor were catried out and presented in this paper. on the basis of the research, a new soil moisture sensof, which it is very suitab1e for field use, was developed

    本文在國家科技部「九五」儀器儀表攻關項目的資助下（專題號： 96 - a23 - 02 - 010 ） ，以土壤介電特性為研究的鍥入點，對基於駐波率原理（ standingwaveratio ? swr ）的土壤水分快速測量方法做了系統的理論分析和深入的性能分析研究，為研究開發成功swr型土壤水分測量傳感器奠定了基礎，同時研製出與全球定位系統（ gps ）聯合使用的土壤水分空間分佈速測儀樣機。
  11. 2. in order to meet the real - time simulation and guarantee specified ratio of precision, this paper had simplified and supposed some thermal process in module and use the lumped parameter way to model. for some special components, such as furnace cavity or water screen, had been reached good ratio of precision of simulation by divided into three parts ( upper area, intermediate area and lower area ) to model separately because of the huge difference of heat loading in vertical direction

    2 、為滿足實時模擬的要求而同時要保證有一定模擬精度，本文對模型做出了一定的假設和簡化，並且主要採用集總參數法進行建模，對於一些特殊部件，比如爐膛和水冷壁，由於其豎直方向熱負荷差異較大，本文將其分為上、中、下三個區域，分別採用集總參數建模，達到比較好的模擬精度。
  12. Usage : ratio with water is 1 : 20, and use directly

    使用時按1 : 20配水使用。
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