rare-earth elements 中文意思是什麼

rare-earth elements 解釋
輕稀土元素
  • rare : adj 1 稀少的；（空氣等）稀薄的；（群島、星等）稀疏的。2 稀有的，珍奇的；極好的，珍貴的。3 〈口語...
  • earth : n 1 〈常E 〉 地球。2 大地，陸地，地面，地上。3 土壤，土。4 【化學】土類；泥。5 世界人類；人的軀體...
  • elements : 德魯伊選擇元素
  1. The compositions of usual elements and rare earth elements and inclusions of corundum megacrysts related to alkali basalt in changle, shandong province, are analyzed. in the main parts of corundum megacrysts are a large number of fluid - melting inclusions, zircon, ta - columbite inclusions, and in the central crystal core are a large number of melting inclusions. the corundum megacrysts were formed in different periods and different physical chemistry conditions. the crystal core was formed in magma system, and the main parts were formed in inhomogeneously geochemical conditions in which magam and fluid phases coexisted

    分析山東昌樂與堿性玄武巖有關的剛玉巨晶不同部位的常量元素、稀土元素及包裹體組成.剛玉巨晶的主體以大量流體?熔體包裹體、鋯石、鈮（鉭）鐵礦包裹體為主，而巨晶中的「晶核」部位則以大量的熔體包裹體為主，反映研究區的剛玉巨晶是在不同的階段形成的.剛玉「晶核」以及「銅皮剛玉」形成於熔體相為主的體系中，而主體剛玉則形成於熔體?流體過渡的急劇變化的不均一的地球化學環境中
  2. Based on an analysis of geochemical characteristics of rocks and trace elements as well as rare earth elements, this paper holds that they are products of crystallization differentiation of the same magma, that the major ore resource of this area is copper, and that gabbro - diabase is the main ore - bearing horizon

    通過對巖石化學特徵和微量元素、稀土元素地球化學特徵的剖析，表明其是同一巖漿結晶分異的產物，本區主要礦產應為銅，輝長輝綠巖是主要的含礦層位。
  3. Determination method for non - rare earth elements in mixed rare earth metals and compounds

    法測定混合稀土金屬及其化合物中的11個非稀土元素
  4. Effects of rare earth elements on glutamic acid fermentation

    稀土元素對谷氨酸發酵的影響
  5. Rare earth elements ( rees ) consist of lanthanide series with atomic numbers from 57 to 71, as well as scandium ( atomic number 21 ) and yttrium ( atomic number 39 )

    稀土是指原子序數從57到71的鑭系元素以及與其同族的鈧和釔，共有17個元素。
  6. Based on the studies of microthermometry, gas composition, liquid composition, rare earth elements, ore - forming elements and 13c, d, 18o of fluid inclusions from the mineralization district and the representative deposits, such as zacun gold deposit, shuixie copper - cobalt deposit, shiyancun stibium deposit and bijiashan stibium deposit, two metallogenic fluid systems have been distinguished, i. e., zijinshan metallogenic fluid system and gonglang metallogenic fluid system in weishan - yongping mineralization district

    礦化集中區及扎村金礦、水泄銅鈷礦、石巖村銻礦、筆架山銻礦等典型礦床流體包裹體的顯微測溫、氣相成分、液相成分、稀土元素、重金屬元素及~ （ 13 ） c ， d ， ~ （ 18 ） o穩定同位素的研究表明，雲南巍山-永平地區銅金多金屬礦化集中區存在兩個成礦流體系統：紫金山背斜成礦流體系統與公郎弧成礦流體系統。
  7. The role of rare earth elements on electro - deposition of ni - p alloy is also studied a fast speed electro - deposition method in centrifugal force field is proposed

    同時，本論文對稀土元素在電沉積ni - p合金過程中的作用進行了比較深入的探討。
  8. The result shows that with the addition of rare earth elements, ultrasonic irradiation and magnetic field, the chemical component, surface configuration, microstructure and properties of electroless co - ni - b and co - fe - b alloy changes remarkably. such kind of change can be described as the followings. firstly the depositing speed of electroless alloy bath is raised while the polarizability and cathodic overpotential are reduced ; secondly the surface quality of the alloy coating and adhesion of the coating and matrix are improved ; thirdly in the coatings the content of the elements in the transient group increases, but the content of cobalt decreased ; fourthly the amorphous structure is transformed to microcrystal structure and polycrystal structure ; fifthly the microhardness and wear resistance of the coating are enhanced ; sixthly coercitive force is reduced, and magnetoconductivity of the coating is increased ; lastly the magnetic intensity of the coating increases with the addition of energy and light rare earth elements such as ce, la and decreases with the addition of heavy rare earth elements such as y. on the other side, when the alloy coatings passes through the heat treatment under the temperature of 250 or 500, their properties will change

    結果顯示化學沉積co - ni - b 、 co - fe - b工藝在稀土元素（ ce 、 la 、 y 、 dy ） 、能量（超聲波、磁場）介入后，沉積過程、合金成分、鍍層形貌結構和性能都有顯著變化，表現在：鍍液的陰極極化過電位和極化度降低，沉積速度提高；鍍層的結合力、表面質量改善；鍍層中過渡族元素的含量增加，輕元素硼的含量降低，同時證實了稀土元素與過渡族元素共沉積的可能性；鍍層的顯微結構由非晶態向微晶和多晶態轉變；鍍層的顯微硬度與耐磨性提高，力學性能優化；鍍層的矯頑力降低；磁導率提高；鍍層的磁化強度在能量（超聲波、磁場）和輕稀土元素ce 、 la介入后提高，重稀土元素y介入后降低。
  9. It indicated that not only can spirulina cells grow photoautotrophically and photomixtrotrophically, but also can grow heterotrophically under some specific conditions. light intensity, light quality, temperature, species and concentration of metals, rare earth elements and vitamins, salinity, cell concentration, dissolved oxygen level and magnetic filed etc., all play important roles in photosynthetic performance and cell productivity of spirutina

    認為螺旋藻細胞不但能進行光合自養和混合營養生長，而且在某些特定的環境條件下，還能進行異養生長；光照強度、光質、溫度、金屬元素、稀土元素、鹽度、藻體細胞濃度、溶氧水平、維生素、激素和磁場等環境因素對螺旋藻細胞的光合性能和細胞產率都有顯著影響。
  10. Rare earth elements ; chloroplasts ; neutron activation analysis

    稀土元素葉綠體中子活化分析
  11. The application of rare earth elements on textile

    稀土化合物在紡織加工領域的應用
  12. Effects of rare earth elements on chlorine evolution potential

    稀土元素對析氯電位的影響
  13. Substance sources of rare - earth elements in late permian coal seams on coal mines in bijie

    畢節煤礦區晚二疊世煤層稀土元素的物質來源
  14. Effect of rare - earth elements la3 on growth of hairy roots and normal roots of rheum palmatum and their yield of anthraquinone

    稀土元素鑭對掌葉大黃毛狀根和非轉化根生長及蒽醌產量的影響
  15. The analysis of oxidation mechanism indicates that the principal causes of thermal oxidation resistance are as follows : rare earth elements have a function to discontinue autooxidation chain reaction and the formed complex structure can hinder the oxidation resistance

    經過氧化機制分析，認為抗熱氧化效應的原因主要是稀土元素具有中止自動氧化鏈式反應的作用以及形成的絡合結構有阻礙氧化的立體效應。
  16. Qptimization of the extracion processes for the separation of rare earth elements

    稀土萃取分離流程的優化選擇
  17. The effects of aquasorb combined with peat, zeolite and rare earth elements respectively or physiological characteristics of maize seedlings under water stress and well watered conditions were studied with a pot grown experiment

    摘要通過盆栽實驗對玉米幼苗生長及生理特性的監測，探討了水分脅迫和正常供水條件下保水劑分別與泥炭、沸石和稀土復合應用的互作效應。
  18. The study of regional geological setting mineralization environment, occurence mode of ore bodies, ore characteristics, metallogenic phase, trace elements and rare earth elements, ore - forming mechanism, ore - controlling conditions, ore types and prospecting marks of the gold deposit along kangur ductile shear zone has a certain instructive significance on setting up a regional metallogenic model and identification marks of gold of ductile shear zone type along kangurtage, and on probing into metallogenic regularity and comprehensive prospecting model

    摘要通過對康古爾韌性剪切帶型金礦床的區域地質背景和成礦環境、礦體產出形態、礦石特徵、成礦階段、礦床微量元素及稀土元素、礦床形成機理、成礦控制條件、礦床類型、找礦標志的研究，對成礦規律和建立綜合找礦模型均具有一定的指導意義。
  19. This paper determines the technological process, bath formularizstion and experimental parameter of electroless multicomponent cobalt based soft magnetic film with rare earth elements joined such as co - ni - b - re and co - fe - b - re by the means of perpendicular experiment and regression analysis. this paper also studies the active mechanism of rare earth elements, ultrasonic irradiation and magnetic field on the plating process, chemical component, surface configuration, microstructure and properties of electroless multicomponent cobalt based soft magnetic film in the way of examining in the component, microstructure and properties of such alloy

    本文採用正交實驗和回歸分析的方法，確定了稀土化學沉積co - ni - b - re 、 co - fe - b - re多元鈷基軟磁薄膜的工藝流程、鍍液配方和實驗參數，並通過對合金鍍層的成分含量測定、形貌結構分析和力學磁學性能評估，研究了稀土元素、超聲波、磁場介入化學沉積多元鈷基軟磁薄膜工藝后，對合金成分、結構和性能的作用機制。
  20. Test of leaching rare - earth elements from phosphate rock containing rare - earth elements

    含稀土磷塊巖稀土浸出探索性試驗
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