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aluminum
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     Study on the Process,Devices and Principle of Multi-Layer Spray Co-Deposition Technology for the Preparation of Large-Sized SiC Particulate-Reinforced Aluminum Alloy Composites
     多层喷射共沉积制备大尺寸SiC颗粒增强基复合材料的工艺、设备及过程原理研究
短句来源
     Study on the Radiative Opacity of Aluminum Plasmas Using a Model Based on the Detailed-term-accounting Approximation
     使用细致谱项模型研究等离子体的辐射不透明度
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     Study of the Character of Aluminum Nitride Co-fire Metalization and Multilayer Thin Film Metalization
     氮化共烧基板金属化及其薄膜金属化特性研究
短句来源
     Study of Solidification Process and Shape Defection Control of Electromagnetic Casting Aluminum Slabs
     电磁铸造板坯的凝固过程和变形控制研究
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     Biological Characters and Mechanisms of Aluminum Toxicity in the Root Tips and Border Cells of Barley
     大麦根尖和边缘细胞毒生物学特性及其机理研究
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  铝合金
     CORROSION FATIGUE MECHANISM OF HIGH STRENGTH ALUMINUM ALLOY AND FULL-LIFE ENGINEERING MODEL FOR CORROSION FATIGUE
     高强度铝合金腐蚀疲劳机理与腐蚀疲劳全寿命工程模型
短句来源
     The Effect and the Mechanism of Static Electric Field on Aluminum Alloy
     静电场对铝合金的作用效应与机制
短句来源
     Study on Method of Monitoring and Control in the Process for Aluminum Alloys Resistance Spot Welding
     铝合金电阻点焊过程质量检测及控制方法的研究
短句来源
     Study on Microstructures and Mechanical Properties of Heat Resistance Aluminum Alloy 2618
     2618耐热铝合金的组织与力学性能的研究
短句来源
     Study on the Technique and Simulation of the Thixo-Forming of Aluminum Alloy
     铝合金半固态触变成形技术及其仿真研究
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  铝的
     Genetic and Molecular Mechanisms of Aluminum Tolerance in Upland Rice (Oryza Sativa L.)
     热带旱稻抗铝的遗传及分子机理研究
短句来源
     Studies on the Relationship between Soil Environmental Geochemical Factors and Uptake of Aluminum from Soil into Tea Leaves
     茶园土壤环境地球化学因素与茶叶从土壤中吸收铝的关系研究
短句来源
     The Calculation of Elastic-Plastic Flow and Spall Induced by Laser Pulse in Aluminum
     强激光脉冲引起铝的弹塑性流动及层裂的计算
短句来源
     KINETIC STUDY ON THE REACTION OF ALUMINUM POWDER WITH HCI FOR POLYALUMINUM CHLORIDE PRODUCTION
     用铝灰生产聚氯化铝的反应动力学研究
短句来源
     An Analytical Approach to the Slip Deformation of the Surface of Polycrystalline Aluminum
     多晶铝的表面滑移变形分析研究
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  “aluminum”译为未确定词的双语例句
     THEORETICAL AND EXPERIMENTAL STUDIES ON TWO DIMENSIONAL MINI-SIZE CONTROLLABLE ROLL SYSTEM OF ALUMINUM FOIL MILLS
     铝箔轧机二维微尺度可控辊系理论与实验研究
短句来源
     Experimental Studies of Equation-of-State Driven by High Power Lasers——The Research of Absolute Measurement of High Pressure Equation-of-State of Aluminum
     高功率激光驱动高压状态方程的实验研究——A1高压状态方程绝对测量的探索
短句来源
     The Investigation on the Properties of Aeronautic Aluminum Alloys Under Synergistic Action of Environmental and Mechanical Factors
     环境与力学因素协同作用下的航空铝合金性能研究
短句来源
     Study on the Rheological Behavior and Gates of the Thixoforming of Semi-Solid Aluminum (A356) Alloy
     半固态合金(A356)触变成形流变特性及其浇道系统的研究
短句来源
     Study of Polyoxometalates on Anodic Aluminum Oxide/glass Carbon Electrode Electrochemical Properties and Application
     杂多酸在阳极氧化铝膜/玻碳电极上电化学性质及应用研究
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  aluminum
Fe0.3Co0.7 nanowire arrays were prepared by electrodeposition into the porous anodic aluminum oxide templates.
      
Moreover, an adhesive strength of 4.88 kN/m was reached in the PP-g-AA/aluminum laminate.
      
Experimental studies on the axial crash behavior of aluminum foam-filled hat sections
      
Drop hammer tests were carried out to study the axial crash behavior of aluminum foam-filled hat sections.
      
First, the axial crash tests of the empty hat sections, aluminum foam and the aluminum foam-filled hat sections were carried out; then, based upon the test results, the axial crash behavior of the aluminum foam-filled hat sections were analyzed.
      
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The average nuclear level spacings of In, Ir and Au are estimated from the beta-ray activities induced by the primary photo-neutrons emitted from a Ra+Be source. A Geiger-Muller counter made of aluminum is used for measuring the induced activities. The saturated induced activities for the three elements are found to be 0.665±0.23 0.982±.03l, 0.453±0.21 (no./sec.) respectively. The estimation for the average nuclear level spacings is made in accordance with Breit-Wigner's one level formula, the resnlts...

The average nuclear level spacings of In, Ir and Au are estimated from the beta-ray activities induced by the primary photo-neutrons emitted from a Ra+Be source. A Geiger-Muller counter made of aluminum is used for measuring the induced activities. The saturated induced activities for the three elements are found to be 0.665±0.23 0.982±.03l, 0.453±0.21 (no./sec.) respectively. The estimation for the average nuclear level spacings is made in accordance with Breit-Wigner's one level formula, the resnlts being 5.6, 15 and 6 volts for In, Ir, Au respectively. The spacing of Ir is probably somewhat over estimated since the values of the energy and absorption coefficient of the resonance neutron group, used in the estimation, are not very accurate.

作者用镭加钡之光感中子以射击铟铱金三元素,而以一铝质盖密计(GeigerMuller counter)测其感应放射能。得各元素感应放射能之饱值,铟为0.665士.023.铱为0.982±.031,金为0.453±.024.依白威二氏(Breit-Wigner)之单能准式,吾人可自感应放射能之值道出原子核能准之平均间隔。所得结果,铟铱金各为5.6,15,6伏特。因计算时所用共振中子之能及吸收系数不太准确,估计所得铱之间隔大概过高。

A.The Soils Since the goological formation of this mountainous area is quite uniform,a vertical distribution of soils is obviously observed. At the top of the mountain with an elevation of 8,500 feet,the podzolic soil is found. The process of podzolization is clearly shown by the translocation of clays,organic matter, and active aluminum from an upper to lower layer.The gray brown podzolic soil is distributed in areas ranging from 7,000 to 8,500 feet in elevation.It is developed under forest and...

A.The Soils Since the goological formation of this mountainous area is quite uniform,a vertical distribution of soils is obviously observed. At the top of the mountain with an elevation of 8,500 feet,the podzolic soil is found. The process of podzolization is clearly shown by the translocation of clays,organic matter, and active aluminum from an upper to lower layer.The gray brown podzolic soil is distributed in areas ranging from 7,000 to 8,500 feet in elevation.It is developed under forest and has a surface covering of leaf litter and a surface soil with high content of organic matter.In places at an elevatin from 3,900 to 7,000 feet the yellow podzolic soil is dominant.At an elevation below 3,000 foot the red podzolic soil and the sketetal soil are fonnd. The analytical data of the soils of this area may be summarized as follows: 1.pH values of the soils:In the whole area,since the parent rock (gneiss) is poor in basic constituents,soils are all acid in reaction.The pH of the different horizons of the soils ranges from 4.0 to 5.5.The A_0 and A_1 horizons are usually less acid than B horizon,the A and B horizons are much more acid than the parent rock.This shows the leaching process of the soils under such a humid atmosphere. 2.Organic Matter of the soils:The organic matter content of the soils in this area is greatlg influenced by the kind of the vegetation cover.At an elevation of 8,500 feet, the soil developed under forest has 38.92% of organic matter in the A_1,while that under grass has only 11.08% of organic matter in the corresponding horizon.However as the vegetation cover is constant,the dopth of the A_1 and its organic matter content are evidently affected by the elevation.At an elevation of 3,000 feet,the A_1 horizon of the red podzolic soil is only 1 cm.in depth,and it has 3.37% of organic matter.At an elevation of 8,500 feet,howerver,the A_1 horizon of the podzolic soil is 7 cm.in depth, and it has 11.08% of organic matter.In addition,deposition of organic matter in the B horizon is clearly found in the podzolic soil,but it has not been seen in soils found at lower elevation. 3.Active aluminum of the soils:All the soils in this area are high in active aluminum. They contain from 20 to 16 p.p.m.of active aluminum.The content of active aluminum in the different horizons of the same profile has a very close relationship with the pH values of the corresponding horizon.The less acid the reaction the smaller is the amount of acitve aluminum.The active aluminum of the soil is usually higher in amount than that of the parent rock from which the soil is derived. 4.Available calcium magnesium,and potassium of the soils:All the soils are general- ly low in available calcium,magnesium,and potassium.The comparatively high content of these elements in the A horizon is derived from the leaves of the vegetation which are grown on that soil. 5.Available phosphorus of the soils:All the soils of this area are low in available phosphorus. 6.Available nitrate:All soils in this area are very low in nitrate. B.The Vegetation 1.The plants growing on soils of this area are most calcifuge species which are acid- loving (Vaughan and Wishe,1937).As far as the chemical analysis of the soil is concer- ned,those species may be assumed as not only acid-loving,buy also active aluminum- loving (Hutchinson,1943). 2.The distribution of the calcifuge plants In this area is apparently affected by the local climate in terms of elevation.Some of them (temperate plants) are confined to high elevation,others(tropical plants) being limited to low elevation,Two groups of the plants may be given as follows.Many of them are of the same species as those found in southwestern China (Hou,1944). (a) Plants mainly ocurring in areas at elevations from 7,000 to 8,500 foot (temperate plants): Pteridophyta: Destaedtia Scabra (Wall.) Moore Diranopteris linearis Under. Hicrioptris glauea Under. Hymenophyllum crispatum Wall. Hymenophyllum exsertum Wall. Lidsaya cultrata Sw. Lycopodium clavatum L. Plagiogyria pyphylla (Kunze) Mett. Pteridium aquilinum Wightianum Trym Pteris aspericaulis Wall. Flowering Plants: Castanopsis tribuloides A.DC. Lindera pulcherrima Bth. Osbeckia crinata Bth. Rhododendron arboreum Sm. Rhododendron grande Wight Pieris formosana D.Don Vaccinium refersceda HK. Vaccinium serrasum Wight (b) Plants mainly ocurring in areas at elevation from 1,000 to 3,000 feet (tropical plants): Pteridophyta: Adiantum philippense L. Blechnum orientale L. Aglaoorpha coronaus Copel Lycopodium cernum L. Nephrolepsis cordifolia Presl Tectaria spp. Polypodium ucidum Roxb. Flowering plants: Oxyspora paniculate DC. Themeda arundinacea Ridl.

1945年10月中旬,作者留印三月另一周,曾作三次野外调查,计包括印缅边区、恒河平原及喜马拉雅山东南麓等三区,茲先将大吉岭区调查结果,草成此文。调查区域大吉岭位于喜马拉雅山东南麓,在我国西藏边境,全区是山地,海拔自1000到9000尺不等,主为酸性的片麻岩地层,在拔海6500尺地点,年平均气温为56.3℉.,年雨量为122寸。土壤灰壤——灰棕壤组合:在拔海8500尺左右的山顶,灰壤见于草地上,而灰棕壤则发育在森林之下。灰棕壤——灰化黄壤组合:在拔海7000—8000尺地带,森林下仍是灰棕壤,而草地上则为灰化黄壤。灰化黄壤——粗骨土组合:在拔海1000—3000尺地带,片麻岩生成灰化红壤,酸性砂岩生成砾质土。全区土壤特征可归纳如下: (1)土壤 pH 值:全区因土壤母质为酸性片麻岩,各类土壤剖面亦为酸性反应;pH 值约自4.0至5.5。A_1层之 pH 值恒较 B 层为大,而土壤剖面内之 A 层及 B 层均较母岩之酸度为高。 (2)土壤有机质:从土壤有机质分析结果观之,显示植物种类对于土壤有机质之含量高低,有密切的关系,在拔海8500尺之地带,发育于森林下的灰棕壤,表土含有机质38.92%,而同处草类和蕨类植物...

1945年10月中旬,作者留印三月另一周,曾作三次野外调查,计包括印缅边区、恒河平原及喜马拉雅山东南麓等三区,茲先将大吉岭区调查结果,草成此文。调查区域大吉岭位于喜马拉雅山东南麓,在我国西藏边境,全区是山地,海拔自1000到9000尺不等,主为酸性的片麻岩地层,在拔海6500尺地点,年平均气温为56.3℉.,年雨量为122寸。土壤灰壤——灰棕壤组合:在拔海8500尺左右的山顶,灰壤见于草地上,而灰棕壤则发育在森林之下。灰棕壤——灰化黄壤组合:在拔海7000—8000尺地带,森林下仍是灰棕壤,而草地上则为灰化黄壤。灰化黄壤——粗骨土组合:在拔海1000—3000尺地带,片麻岩生成灰化红壤,酸性砂岩生成砾质土。全区土壤特征可归纳如下: (1)土壤 pH 值:全区因土壤母质为酸性片麻岩,各类土壤剖面亦为酸性反应;pH 值约自4.0至5.5。A_1层之 pH 值恒较 B 层为大,而土壤剖面内之 A 层及 B 层均较母岩之酸度为高。 (2)土壤有机质:从土壤有机质分析结果观之,显示植物种类对于土壤有机质之含量高低,有密切的关系,在拔海8500尺之地带,发育于森林下的灰棕壤,表土含有机质38.92%,而同处草类和蕨类植物发育下的灰壤的表土,仅含有机质11.08%,但在相同的植物环境下,拔海高度或局部气候,也是支配土壤有机质含量的重要因素,例如在拔海3000尺地带,长有草类的灰化红壤,仅有极薄之有机质层,该层有机质含量为3.37%,而在拔海8500尺地带,长有草类的灰壤,则有较厚层有机质,其含量为11.08%。 (3)可溶性铝质:全区土壤含有高量可溶性铝,大约自20至160 p.p.m.,其含量与 pH 值高低相关,土壤 pH 值愈酸,可溶性铝含量就愈高。 (4)可溶性钙镁及钾质:全区土壤之可溶性钙,镁及钾等之含量均较低,但就同一土壤剖面而言,富于有机质的 A。或 A_1层的钙镁和钾质,常较 B 层为高,此点显示此等成份是来自植物遗体,亦即指示土壤中有机质与肥力之关系。 (5)全区土壤有效磷含量均甚低。 (6)全区土壤硝酸态氮之含量均极低,并有下淋现象。植物本文所论植物,仅以作者所采集而经各专家鉴定为限,其中以蕨类植物为主。本区的土壤都是酸性反应,所见的植物是以嫌钙性者为主,这些嫌钙性植物与拔海高度的关系很显著,兹将常见的植物种类,叙述如下: (一)主分布于拔海7000—8500尺地带的植物: 蕨类植物 Dennstaedtia scabra(Wall.)Moore Dicranopteris linearis Under. Hicriopteris glauca Under. Hymenophyllum crispatum Wall. Hymenophyllum exsertum Wall. Lindsaya cultrata Sw. Lycopodium clavatum L. Plagiogyria pycniphylla(Kunze)Mett. Pteridium aquilinum Wightianum Trym. Pteris aspericaulis Wall.种子植物 Castanopsis tribuloides A.DC. Lindera pulcherrima Bth. Osbeckia crinata Bth. Rhododendron arboreum Sm. Rhododendron grande Wight Pieris formosana D.Don Vaccinium referesceda HK. Vaccinium Serrasm Wight(二)主分布于1000—3000尺地带的植物: 蕨类植物Adiantum philippense L.Blechnum orientale L.Aglaomorpha coron(?)us copelLycopodium cernuum L.Nephrolepsis cordifolia PresslTectaria spp.Polypodium lucidum Roxb.种子植物Oxysoira paniculata DC.Themedra arundinacea Ridl.

1.Homo-ionic colloidal clays (Mg-clay>H-clay>Be-clay>NH4-clay>K-clay>Na-clay. 3.The collcidal clays from yellow earth having lower SiO_2/R_2O_3 ratios fix more phosphate than that from purple brown...

1.Homo-ionic colloidal clays (Mg-clay>H-clay>Be-clay>NH4-clay>K-clay>Na-clay. 3.The collcidal clays from yellow earth having lower SiO_2/R_2O_3 ratios fix more phosphate than that from purple brown soil. 4.The phosphate fixation power of H-clay is markedly reduced after the removal of free irn and aluminum oxides. 5.In Ca-clay,the fixed phosphate was unstable.The association of phosphate with the exchangeable calcium is easily liberated by a very dilute acid solution.

土壤中磷酸固定作用每受外界环境之影响而有很大差异,如粘土矿物的种类,土壤反应,代换性盐基等,黏土矿物与土壤反应对于磷酸固定前,人已有较详细之报告,本文特重视代换性盐基之种类对于磷酸固定之关系。本试验以紫色土与黄壤为代表,均取于北碚。紫色土系发育于白垩纪自流井层紫色页岩,属中性而无石灰性反应,pH=7.0,黄壤系自侏罗纪灰色砂岩风化者,心土微红,pH=4.5—5.0,为避免过高之有机质,均采取心土,按照 Stoke 氏定律提取5微米(micron)直径之黏土粒,晒干后,分别以 N NaCl,N KGl,N NH_4Cl,N MgCl_2,N BaCl_2及 pH=3 HCl 处理,然后再以90%酒精洗涤至无氯为止,总之以不变更胶体之构造为原则,经处理之黏土,先分析其中之代换性盐基以及盐基代换总量,然后再测定其磷酸固定量,在酸性反应如 H~-黏土,其磷酸固定之主要因子为水化铁及水化铝,故再以 pH=2之盐酸淋洗,除去其中游离铁铝,再测定其磷酸固定量以资比较。按分析结果,黄壤胶体(<2 micron)中之(SiO_2)/(R_2O_3)为2.19,紫色土为2.56,前者盐基代换总量每百克黏土粒(<5 micron)...

土壤中磷酸固定作用每受外界环境之影响而有很大差异,如粘土矿物的种类,土壤反应,代换性盐基等,黏土矿物与土壤反应对于磷酸固定前,人已有较详细之报告,本文特重视代换性盐基之种类对于磷酸固定之关系。本试验以紫色土与黄壤为代表,均取于北碚。紫色土系发育于白垩纪自流井层紫色页岩,属中性而无石灰性反应,pH=7.0,黄壤系自侏罗纪灰色砂岩风化者,心土微红,pH=4.5—5.0,为避免过高之有机质,均采取心土,按照 Stoke 氏定律提取5微米(micron)直径之黏土粒,晒干后,分别以 N NaCl,N KGl,N NH_4Cl,N MgCl_2,N BaCl_2及 pH=3 HCl 处理,然后再以90%酒精洗涤至无氯为止,总之以不变更胶体之构造为原则,经处理之黏土,先分析其中之代换性盐基以及盐基代换总量,然后再测定其磷酸固定量,在酸性反应如 H~-黏土,其磷酸固定之主要因子为水化铁及水化铝,故再以 pH=2之盐酸淋洗,除去其中游离铁铝,再测定其磷酸固定量以资比较。按分析结果,黄壤胶体(<2 micron)中之(SiO_2)/(R_2O_3)为2.19,紫色土为2.56,前者盐基代换总量每百克黏土粒(<5 micron)为18m.e.后背为30m.e.,兹将试验所得结果归纳如次: 1.磷酸固定量每因土壤胶体之不同而有差异,由黄壤所提取之黏土其磷酸固定量亦较紫色土为高。 2.土壤之磷酸固定量,非特因土壤胶体之不同而有差异,即或同一黏土,其磷酸固定量亦因其代换性盐基之不同而有差异,概言之,钠黏土之磷酸固定量为最小,钾黏土次之钡、铵黏土又次之,而以钙黏土为最大,其磷酸固定次序为: Ca-黏土>Mg-黏土>H-黏土>B(?)-黏土>NH_4-黏土>K-黏土>Na 黏土 3.各种不同代换性盐基的粘土,加磷酸溶液后,其反应亦各不相同,H~-黏土之 pH 值为3.2—4.5,因其酸度较高,溶液中之游离铁与游离铝含量较多,是故磷酸固定量亦较高,如以淡盐酸(pH=2)洗涤,除去其中游离铁铝后,其磷酸固定量则大为减少,Na~-黏土与 K~-粘土之溶液中,因 OH 离子较多(pH=8.0—8.6),而磷酸钠与磷酸钾又为水溶性,故磷酸固定量为最少。Ca~-粘土与 Mg-粘土其反应属中性至微碱性,pH=7.5—8.0,因溶液中 Ca,Mg 离子浓度较高,磷酸则为此 Ca,Mg离子所固定,故在中性土壤中,磷酸固定以 Ca 为其主要在子,酸性土壤则以水化铁为其主要因子。 4.钙粘土所固定之磷酸,如以0.002 N H_2SO_4提取,其所固定之磷酸复可溶解,是项固定之磷酸与 Heck 所称「暂时固定磷酸」颇为相似。

 
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