查询词典 Al

The degree of hydrogenation of methyl benzoate might be controled by adding the promoters and changing the nano-size of ZnO. For hydrogenation of methyl benzoate to benzaldehyde, the active-structure of a catalyst should be modified to decrease the absorption of benzaldehyde on the surface of it, because benzaldehyde absorbed is hydrogenated easily. Using 30-40％ZnO/γ-Al〓O〓 or Li-30％ZnO/γ-Al〓O〓, a higher selectivity to benzaldehyde is obtained. Hydrogenolysis of methyl benzoate to toluene or benzene is carried out effectively using a catalyst modified. For instance, 45.3％ selectivity to benzene and 100％ conversion of methyl benzoate at 420℃ was obtained over 10％ZnO/MCM-41 with the nano-size particles of ZnO (2.4nm).

也可以通过助催化剂的添加和活性组分的纳米化，并根据苯甲酸甲酯多步加氢反应的特点实行加氢深度的调控：苯甲酸甲酯选择性加氢制苯甲醛中，由于苯甲醛容易进一步加氢，需要对活性结构进行调变，以减弱苯甲醛的吸附，使用30-40％ZnO/γ-Al〓O〓催化剂或Li调变的Li-30％ZnO/γ-Al〓O〓催化剂，可获得较高的苯甲酸甲酯加氢制苯甲醛的活性；采用同样的方式，苯甲酸甲酯选择性氢解为甲苯或苯也获得了较好的结果，如使用ZnO纳米化的10％ZnO/MCM-41催化剂，在420℃，可获得45.3％的苯选择性，苯甲酸甲酯完全转化。

A novel composite-channel Al x Ga1- x N/Al y Ga1- y N/GaN high electron mobility transistor has designed and optimized.

对新型复合沟道Al x Ga1- x N/Al y Ga1- y N/GaN高电子迁移率晶体管进行了优化设计。

A recent book by one of the founders of al-Qaeda, Sayyid Imam al-Sharif dismisses al-Qaeda's message and renounces the violence and aggression of the September 11th attacks.

近日由本拉登组织建立者之一Sayyid Imam al-Sharif（人们更熟悉的名字是Dr Fadl）出版的一本书中，这个人传达本拉登的消息并且放弃了在9.11袭击中的暴力即侵略行动的人。

Electrochemical examination and corrosion test showed that the Al-Ti and Al-Mn alloy platings have excellent corrosion resistance.

电化学测试及腐蚀试验结果表明，所得到的Al－Ti和Al－Mn合金镀层具有优异的耐蚀性。

In order to fabricate high–silicon aluminum alloy electronic packaging materials, the oxidating processes in high temperature oxygenation was applied to the Al-30Si and Al-40Si high-silicon aluminum alloys which were prepared through extrusion process. Scanning electron microscope, optical microscopy, thermal physical tester and universal material testing machine were used to study the microstructure, density, hermeticity, coefficient of thermal expansion, thermal conductivity and compressive strength.

摘 要：针对应用广泛的高硅铝合金电子封装材料，采用高温充氧氧化工艺，对已挤压成形的Al-30Si及Al-40Si高硅铝合金材料进行后续处理，通过扫描电镜、金相显微镜、热物性测试仪及电子万能拉伸试验机等，对材料显微组织、密度、气密性、热膨胀系数、热导率及抗压强度进行了分析比较。

In order to fabricate high–silicon aluminum alloy electronic packaging materials,the oxidating processes in high temperature oxygenation was applied to the Al-30Si and Al-40Si high-silicon aluminum alloy s which were prepared through extrusion process.

针对应用广泛的高硅铝合金电子封装材料，采用高温充氧氧化工艺，对已挤压成形的Al-30Si及Al-40Si 高硅铝合金材料进行后续处理，通过扫描电镜、金相显微镜、热物性测试仪及电子万能拉伸试验机等，对材料显微组织、密度、气密性、热膨胀系数、热导率及抗压强度进行了分析比较。

In order to fabricate high–silicon aluminum alloy electronic packaging materials,the oxidating processes in high temperature oxygenation was applied to the Al-30Si and Al-40Si high-silicon aluminum alloys which were prepared through extrusion process.

针对应用广泛的高硅铝合金电子封装材料，采用高温充氧氧化工艺，对已挤压成形的Al-30Si及Al-40Si高硅铝合金材料进行后续处理，通过扫描电镜、金相显微镜、热物性测试仪及电子万能拉伸试验机等，对材料显微组织、密度、气密性、热膨胀系数、热导率及抗压强度进行了分析比较。

When the thermal treatment temperature reaches 659℃, the hydroxyl in octahedra sheet begins dehydrating, but the layer structure is maintaining, this process is corresponding to Al turning to Al in octahedra sheet.

加热到659℃时，蒙脱石八面体片中的羟基开始脱失，但层状结构仍然保持，这种羟基的脱失过程对应着八面体片中Al向Al的转变。

The hydroxyl in octahedra sheets begins dehydrating, when the thermal treatment temperature reaches 659℃, but the layer structure remains unchanged, the corresponding AlⅥ turns into AlⅣ in octahedra sheets.

蒙脱石在热处理温度温度达到659℃时，八面体片中的羟基开始脱失，但层状结构仍然保持，这种羟基的脱失过程对应着八面体片中AlⅥ向AlⅣ的转变。

Within weeks, al-Fahim sold Portsmouth to Ali al-Faraj, a Saudi property developer of whom little is known except that, since he bought the club, paying the wage bill each month has been a struggle.

几周之内al-Fahim就把朴茨茅斯卖给了名不见经传的沙特开发商Ali al-Faraj，他接手以来每个月付工资都很困难。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。