二金属的

In this dissertation, we study a variety of materials , from conventional semiconductor, organic semiconductor to semimetal, adsorbed on transitional metal surfaces.

本 论文对二维新型材料（从有机半导体、无机半导体到新近发现的半金属graphene）进行了第一性原理研究，研究涉及的材料物性包括几何构型、电子结构等方面。

In this work, Ag/TiO_2 was opted, the synthesis and UV-Vis. spectral property of nanoparticles with titanium dioxide as the covering shell and silver as the inner core were discussed.

论文以Ag/TiO2为体系，重点研究以二氧化钛为包覆层、金属银为核的纳米粒子的合成与制备，着重讨论了其紫外一可见光吸收性能。

Treated by transesterification with methanol to 60% of the theoretical extent and esterified with maleic anhydride,then oxidized by air with supported metal stearate catalyst at 80 ℃ for 4-6 h and sulphited by sulphite,a novel combined sulphited fatliquoring agent is obtained from rape oil.

对菜油进行甲醇酯交换反应，反应程度控制在理论值的 6 0 %，然后用顺丁烯二酸酐酯化酯交换产物。这种酯化物在负载型金属皂的催化下，用空气进行氧化，温度 80℃，时间 4～ 6h。

Thermoset materials need not be subjected to the relative thermal capability requirements of UL 746C.

特例二：受热金属在UL746C中规定的相关的温度下不得屈服。

Nanometer TiO2 thin film supported on wire gauze were prepared with sol-gel method and modified by doping carbon black to increase specific surface area.

通过溶胶－凝胶法制备纳米二氧化钛，采用浸渍提拉的方法将TiO2固定在金属丝网上，通过掺杂碳黑获得高比表面的催化薄膜，用比表面仪、X-ray衍射仪进行表征。

Since xylenol orange interferes to determine some metal ions, such as iron, nickel, the author researched to determine them using EDTA.

6对二甲酚橙有封闭作用的金属离子如三价铁、镍，本文研究了用EDTA法测定它们的方法。

In GIS, the switching of a disconnector will produce very fast transient overvoltage, which could damage the insulation of GIS and other connected equipments and produce electromagnetic interference into low voltage control systems.

气体绝缘金属封闭开关设备中隔离开关的操作会产生特快速暂态过电压，可能导致GIS本体及其相连的设备绝缘损坏，并可能产生电磁干扰，影响二次设备。

B. Three novel dimeric dissymmetric chiral ligands and six chain binuclear Salen complexes were synthesized and characterized by FT-IR,〓HNMR, Elemental analyses, UV-vis, furthermore the CD spectra properties of the ligands and complexes were discussed in detail for the first time.

合成了三个未见报道的链式双Salen配体和六个链式双核Salen金属配合物，通过核磁共振波谱、元素分析、红外光谱、紫外-可见光谱进行了表征，并首次详讨论了手性配体及配合物的圆二色光谱性质。

Supported noble metallic catalysts were prepared with different kind of noble metals and of supports,their catalytic performance for furoic acid hydrogenation were investigated in fixed bed micro-reactor in water under different conditions such as reaction pressure,temperature,H2 space velocity,space velocity of furoic acid and solvent and so on.

采用水作溶剂的固定床操作系统，用钌、铑、钯、铂等作为担载金属，氧化硅、活性炭、γ-三氧化二铝等作为载体，制备了多种负载型催化剂，评价了它们的糠酸选择性杂环加氢催化性能。

The result shows that modification can make the β-Si phase thin when the joining amount is 0.3wt%, making the best modification result. Alloying elements Mn and Ni are always used to neutralize iron"s harm in aluminum alloys. They can form many kinds of complicated metallically compounds with Fe and Al, and eliminate needle-like iron-rich phases to reduce iron"s harm in Al-Fe alloy. Copper makes the alloy microstructure thick and electromagnetic stirring obviously makes the alloy microstructure thin, round the second phase, when the stirring voltage is 200V, making the best result; Reheat makes liquid phases emerge in the alloy, when the warming temperature is 650?

研究结果表明：红磷可以明显细化合金中的初晶硅，当加入量为0.3wt%时，取得最佳变质效果；锰、镍合金中加入后，通过形成多种复杂金属间化合物，细化针片状富铁相，减小铁对铝硅合金性能的危害；铜使合金微观组织发生粗化；电磁搅拌明显细化合金组织，使第二相圆整化，搅拌电压为200V时，取得最佳细化效果；二次加热使合金组织中产生部分液相，在650？

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。