查询词典 Al

Relative root elongation, Al content and callose content in root tips and hematoxylin staining were compared in evaluating plants' tolerance of Al stress.

利用相对根伸长率、根尖Al含量和根尖胼胝质含量等三项参数结合苏木精染色法，研究Al胁迫下，各参数在评价植物耐Al性上的地位，以及各参数间的相互关系。

The results show that, When is rapidly solidified AlFeVSi alloy exposed thermally at high temperature, main change below 500℃ in the alloy is Ostwald ripening of Al〓〓Si particle, and above 550℃, Al〓〓Si will congregate along grain boundaries, and even appear needle-shaped or clumpish θ-Al〓Fe〓 phase.

结果表明，快凝细粉AlFeVSi合金高温热暴露时，低于500℃，Al〓〓Si仅发生Ostwald粗化，高于550℃，Al〓〓Si则在晶界聚集，甚至有θ-Al〓Fe〓针、块状相形成。

As the density of Al and Cu was quite difference,it was apt to delaminate and restrain the process of alloy by wet milling.The case was improved when dry milling,though it would be some reunite with the time of ball-milling prolonging.(2)The best technique parameters of high energy ball milling to prepare metastable powders of Cu-Al alloy were;the addition of Al powders was 1% in quality,the powders of Cu-Al were completely alloyed after high energy ball milling for 20 h.

1提出采用高能球磨制备Cu-Al合金粉的有效方法，认为由于Cu和Al的密度相差比较大，采用以液态酒精为过程控制剂的湿磨时，容易发生分层，抑制了合金化，采用干磨时，以硬脂酸为过程控制剂，虽然随球磨时间的延长会发生轻微的团聚，但能达到良好的合金化效果。

When the Al-Mg-Zr-Sc welding wire was used as filling material,the grains of welding seam were refined obviously,and the weld joint was greatly strengthened by forming of fine equiaxial grains layer in fusion zone .

但采用Al-Mg-Zr-Sc合金焊丝为填充材料时，焊缝晶粒组织明显细化，熔合区形成的细小等轴晶层提高了基材与焊缝填充材料的结合力，焊接接头的屈服强度比采用Al-Mg-Zr合金焊丝为填充材料时提高了100 MPa，显著提高了Al-Mg-Sc合金焊接构件的许用强度，因此焊接Al-Mg-Sc板材更宜采用Al-Mg-Sc-Zr焊丝。

A modified γ-Al〓O〓 was prepared by a special precipitation method with aluminum nitrate solution containing a certain amounts of orthosilicic acid and ammonia aqueous solution. Compared with commercial γ-Al〓O〓, the modified γ-Al〓O〓 was an effecient catalyst for dehydration of tetrahydrofurfuryl alcohol to dihydropyran. The results revealed that the strong acid sites on the surface of the catalyst may play a crucial role in this reaction.

并以硝酸铝和氨水为原料，用沉淀法制备出一种高比表面和拥有较多强酸中心的γ-Al〓O〓，它在四氢糠醇开环脱水制备二氢吡喃的反应中有优良的催化活性，通过比较此γ-Al〓O〓和普通商业γ-Al〓O〓的Py-TPD图，发现强酸中心在制备二氢吡喃的反应中可能具有关键的作用。

A series of polyaluminum silicate chloride with has basicity 2.0 and different Al/Si molar ratio, was prepared by means of two kinds of preparation methods: one is to add NaOH into AlC l3 6H 2O and polysilicic acid mixed solution at different Al/Si molar ratio, the other is to add polysilicic acid into polyaluminum chloride(PAC solution with different B at different Al/Si molar ratio.

一种方法是将 Na Cl 加入到不同 Al／ Si 摩尔比的 Al Cl3（6 H2O 和聚硅酸混合液中；另一种方法是按一定的 Al／ Si 摩尔比将聚硅酸加入到聚合氯化铝液中。

The theoreti cal results show that in Al-rich region of the ordered TiAl alloy,the surplus a toms of Al which occupy the lattices of Ti will decrease the energy of the syste m,in favour of the stability of γ-TiAl phase,while in the Ti-rich region, the surplus atoms of Ti which occupy the lattic of Al will increase the energy o f the system,which disfavors the stability of γ-TiAl phase,and favors the formation of new phase.

理论结果表明有序的γ-TiAl相在富 Al区，多余的Al原子占据Ti的格点后，系统能量降低，有利于γ-TiAl相的稳定性，而在富Ti区，多余的Ti原子占据Al的格点后，将使所有的Ti原子的能量增大，使系统能量升高，不利于γ-TiAl相的稳定性，而有利于新相的形成。

It was demonstrated from the experiment that as adding Fe3O4+Al system with 15%addition in the raw Fe2O3+Al system,properties of lined ceramics of curved composition pipes could reach or exceed ones of that produced with chemically pure Fe2O3+Al system.

实验表明，在工业原料Fe2O3+Al体系中加入15%的Fe3O4+Al体系，可使复合弯管内衬陶瓷性能达到并超过用分析纯Fe2O3+Al体系所制备的复合弯管内衬陶瓷性能。

The correlations of the concentrations of Al in tea leaves with sorbed inorganic Al, Al oxide dissolved by hydrochloric acid and Al chelated by humic acid were all not significant, this indicated that the three forms of Al in soil were too stable to be assimlated by tea leaves.

通过成叶和嫩叶铝含量随土壤pH值的变化关系和土壤溶液中铝的存在形态与土壤pH值的关系之比较，初步推测茶叶吸收土壤的铝以Al〓离子为主；由于土壤pH值是影响茶叶吸收铝的主要土壤化学因素，因此，提高茶园土壤pH值，降低土壤酸度是降低茶叶铝含量的有效手段。

For the aged aluminum alloys which generally contain disc/plate-shaped or rod/needle-shaped precipitates, a model has been established, from the viewpoints of thermodynamics, kinetics and strengthening theory, to relate quantitatively the yield strength to the size, volume fraction and aspect ratio of precipitates which all were analytical associated with the chemical compositions of alloys, aging temperature and aging time. This model has been experimentally proved to well predict the variation of yield strength with the evolution of disc/plate-shaped or rod/needle-shaped precipitates for present Al-4. 62wt% Cu-0.65wt% Mg alloy aged at 513K and Al-1. 12wt% Mg0.57wt% Si alloy aged at 463K, respectively, and the yield strengths simulated by this model were also found to be in well agreement with previously measured values for a series of aged Al-Cu binary alloys, AA6061 and Al-Zn-Mg alloys.

以析出热力学、长大动力学及强化理论为基础，研究了含有盘/片状、棒/针状时效析出强化相铝合金在时效过程中时效析出相尺寸、体积分数和长径比等参数的演变及其对合金时效强化效果的影响，给出了合金成分、时效变量与微观组织参数之间非线性的解析表达关系式，进而从微观结构—宏观性能相结合的角度出发建立起了具有盘/片状、棒/针状时效析出相铝合金的时效工艺—屈服强度量化模型，并将该模型应用于不同温度、连续不同时间时效下Al-Cu二元系列合金、6061铝合金和Al-Zn-Mg系列合金的屈服强度预测，得到了与前人实测值吻合良好的结果。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。