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Transition metal phosphides have recently been the focus of research due to their higher activity compared to metal sulfides for HDS and HDN.

最近十几年，过渡金属磷化物以其高HDN和HDS活性和稳定性迅速成为加氢精制领域研究的热点。

Nickel phosphide was chosen as the HDN catalyst in the present dissertation because it is reported to have the highest activity among transition metal phosphides. For the supported nickel phosphide catalysts, mesoporous MCM-41 was used as the carrier. The effect of support modification and the introduction of a secondary metal species on the activity of supported nickel phosphide catalysts were studied.

本论文以磷化镍催化剂为研究对象，考察了MCM-41负载的磷化镍催化剂的制备及其对喹啉的HDN反应性能，载体和活性组分的改性对喹啉HDN反应性能的影响，以及TiO_2的引入对非负载的磷化镍催化剂HDN反应的影响。

Hydro-metal Structure industry is a relatively independent Sector in Water Resources and Electric Power industry, mainly engaging in design, manufacturing, installation and commissioning of various large-sized metal structure products needed in Water Resources and Electric Power projects, such as flat steel gate, radial steel gate, penstocks, hoist, ship locks, etc.

水工金属结构行业是水利水电行业内相对独立的一个产业，主要从事水利水电工程所需的各类闸门、拦污栅、压力钢管、船闸、启闭机等大型金属结构产品的设计、制造、安装、调试业务。

Al2O3 matrix of non-noble metal combustion promotor CuO-CeO2/Al2O3 was modified by metal oxidates, such as MgO and Fe2O3, for changing the matrix structure to improve the performance of sulfur resistance and sulfur transfer.

通过考察金属氧化物(MgO、Fe2O3 等)对 FCC 工艺中非贵金属助燃剂 CuO-CeO2/Al2O3的 Al2O3载体改性所引起载体结构的变化，研究对助燃剂抗硫、硫转移性能的影响。

Using analyses of the surface chemical species formed on palladium in both conditions of flowing oxygen and the ammonia oxidation reaction,it is confirmed that the surface of palladium,at temperatures above 800℃,is a multilayer structure with the bright palladium metal surface being overed by a thin layer of palladium metal vapour and then by a layer of palladium oxidevapour.

本文分析了在流动氧气氛和氨氧化反应过程中Pd的表面化学状态，表明在800℃以上温度Pd的表面应是1种多层结构：光亮的Pd金属表面复盖着一层薄的Pd金属蒸气，Pd蒸气上又复盖着一层PdO蒸气。

Thecompounds were dispersed in the melted silver-based brazing filler metal inamorphous particles as nucleators of heterogeneous nucleation, so that made themelted filler metal form Ag and Cu solid solution as well as Cu solid solutioncontaining CePb or CeBi and that eliminated the negative effects caused by Pb orBi.

通常情况下它们以无定性态存在于银基钎料中，成为非均匀生核的生核剂，使银基钎料形成银固溶体+铜固溶体+含CePb或CeBi化合物的铜固溶体相，从而消除了 Pb或Bi的有害影响。

Unlike nonstick coatings that simply sit on top of metal, this material actually penetrates below the surface, into the pores of the metal.

不像不粘表层简单的镀在金属表面，这种材质实际上穿透表层进入金属的内心。

Especially, new metal nitrides are expected to be prepared by solid state reaction between metal and BN under high pressure.

尤其是通过高压下金属与BN固态反应，可望获得新的金属氮化物。

Bellows sealed valve shut-off valves, and its key components - metal bellows, the lower end of stem components with the introduction of automatic welding roll, roll the top and连接板automatic welding, in the fluid medium and the atmosphere to form a metal barrier between the to ensure zero leakage valve stem.

阀门中波纹管密封截止阀，其关键部件——金属波纹管，下端与阀杆组件采用自动滚焊焊接，上端与连接板自动滚焊焊接，在流体介质和大气之间形成一个金属屏障，确保阀杆零泄漏。

"Lanthanon metal ores mining\",\"稀土金属矿采选业\",\Includes lanthanum, scandium, ytterbium and 17 kinds of metal ores mining.

&，\&包括镧系元素及和镧系元素性质相近的钪，镱等17种矿的采选\

I can still vividly recall the impressive scenes you gave. You were among my friends and relatives who accompanied me from my house to the seaport and when the porters were slow to show up, you obligingly carried my suitcase for me.

你对我的种种感人情意，使我记忆犹新，那天你随着我的亲友从家里送我上轮船，搬运工迟迟不来，你毅然替我提着皮箱上船。

St. Nicholas became the patron saint of Russia, where he was famous for his red cape, flowing white beard, and bishop's mitre.

圣尼古拉成了俄罗斯人的守护神，在那里，他以身披红斗篷，留着飘逸的白胡须，戴着主教法冠而闻名。