成对的

Moreover,the selective oxidation of primary and secondary alcohols to corresponding carbonyl compounds with the multinuclear copper complexes Cul-Cu4 as catalysts have been conducted using TBHP and O_2/TEMPO,respectively.Among them,the copper complex Cu3 showed the best performance.On the performances of the two classes of oxidants,benzylic and heterocyclic alcohols could be effectively oxidized to carbonyl compounds.Specifically,the secondary alcohols could be effectively oxidized to ketones with excellent selectivity up to 100%in the presence of TBHP and the allylic alcohols could be effectively oxidized to aldehydes in the presence of O_2/TEMPO system.

实验结果还表明，在TBHP或O_2/TEMPO存在下，各配合物催化剂均能使各种取代芳香伯/仲醇以及杂环醇等以不同程度的转化率和选择性转化成相应的醛或酮，其中，配合物Cu3在O_2/TEMPO存在下可使苯甲醇和烯丙醇等以较高转化率和近100%的选择性转化成相应的醛，而对其它芳香醇和脂肪伯/仲醇等的催化性能则较差；在TBHP存在下，配合物Cu3则可使1-苯乙醇和其它仲醇以较高转化率和近100%的选择性转化为相应的酮，但对各类其它伯醇选择氧化的性能相对较差。

Purpose To observe the difference of the different sequences and optimize scanning for articular cartilage.Materials and MethodsThree normal cadaver\' s wrists were examined with GE SIGNA EXITEⅡ3.0T MR scanner.SE T1WI、SE T2WI、PDWI、FS PDWIand 3D-FSPGR sequence were obtained with different flip and TE.

第一部分探讨3.0T磁共振腕关节软骨多序列成像的特点目的：观察不同扫描序列及参数对腕关节软骨成像质量的影响，优化获取3D-FSPGR(three dimension fat saturation spoiled gradient echo)序列最佳关节软骨扫描参数。

By dehydrochlorination reaction the poly[(2-methoxyl-5-octyloxy)phenylene vinylene] is synthesized and the material"s structure is characterized by nuclear magnetic resonance spectroscopy, infrared absorption spectrum, ultraviolet and visible spectrophotometry. At the meantime, the fluorescence spectrum is measured and the mechanism of fluorescence occurring is analyzed. Thermal Gravimetric Analyzer"s results show that the MO-PPV"s thermal stability is fine. Also the experiment of resolvable property indicates that the MO-PPV can well dissolve in chloroform. Through analyzing the film"s surface by Metaloscope and Atomic Force Microscope, the good filming is found.

通过脱氯缩合法合成了聚(2-甲氧基-5-辛氧基)对苯乙炔，并分别用核磁共振波谱法、红外吸收光谱法、紫外-可见分光光度法等对其进行了结构表征；测量了样品的荧光光谱，分析了荧光产生的机理；热失重仪分析了材料的热稳定性，研究表明MO-PPV材料具有良好的热稳定性；溶解性实验发现材料在氯仿中溶解性较好；金相显微镜和原子力显微镜研究了薄膜的表面形貌，发现该材料的成膜性良好；材料的导电性研究表明，固体材料在掺杂下才可以表现出导电特性，而配成溶液的材料导电性因溶剂的不同而不同，并随溶解时间的长短发生变化。

Two sets of oil-bearing series,the upper E_2s_4 and E_2s_3 of Palaeogene in Boxing subsag,were studied by adopting organic geochemistry,high-resolution sequence stratigraphy and pool-forming dynamics.

应用有机地球化学、高分辨率层序地层学和成藏动力学等研究方法，对博兴洼陷古近系沙四上亚段和沙三段两套烃源岩的油气成藏的差异性进行了研究。

The occurrence of deleterious alkali-carbonate reaction and performance of certain aggregates were determined by detailed petrographic examination of the aggregates in destructive concrete'structures.

在对材料制备过程的研究中，通过对溶胶—凝胶过程及干凝胶不同烧成温度的物相变化的研究，结合热力学函数方法的计算结果，提出了多组份溶胶的形成过程、溶胶的干燥过程、凝胶的烧成过程中的主要物相的生成反应。

In the past, bangles were often made in pairs, in the belief that good things always come in twos.

过去，手镯和戒指都是成对设计制造的，这是因为人们坚信好事总是成双的。

Results showed that variability coefficients of the boll number per plant were the biggest under different ecological environment.Correlative degree analysis indicated that boll weight was the leading factor restricting the boll number;lint index was one of the major factors that affected boll weight,lint percentage and seed index;seed index was the primary factor restricting lint index.Results of path analysis sho...

结果表明，不同生态环境下单株成铃的变异系数最大；关联度分析表明，铃重是制约株铃的主导因素，衣指是制约铃重、衣分及子指的主导因素，子指是制约衣指的主导因素；通径分析结果表明，株铃对籽棉产量的综合直接作用最大；偏相关分析表明，单株成铃、单铃籽棉重、衣分3个产量因素性状对产量的贡献率占总决定度的77.16%，基本上反映了产量因素的构成情况。

With respect to multiple dominant scatterers in one range bin, a nonlinear least squares autofocusing algorithm is proposed.

第五章在建立机动目标成像的信号模型基础上，对机动目标ISAR成像的自聚焦问题进行了讨论。

On the shingle, ringed plovers, looking too sweet to live in the real world, surveyed their bleak domain two by two, a forbidding place where, astonishingly, they will nest.

在沙滩上，可爱得好像不该生活在现实生活中的剑鸻开始成双成对地巡视着它们荒凉的领地。

A refined frequency scaling algorithm was deduced,which was suitable for airborne SAIL in stripmap model and was taking the Doppler shift term into account.

推导出在该模型下一种适用于机载合成孔径成像激光雷达系统的频率变标算法，一并考虑了在连续波信号模型中多普勒频移项对成像的影响。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。