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Since the first crystal structure of the Fe-only hydrogenase was published in 1998, intensive efforts have been spent on the structural and functional models of Fe-only hydrogenase due to its great capability of catalyzing the reduction of protons to molecular hydrogen at extraordinarily high rates.

自从1998年唯铁氢化酶的第一个晶体结构发表以来,由于它可高效地催化质子还原成氢气,其活性中心的结构和功能模拟受到了广泛关注。

The lexical method overcomes the weakness of POS dependencies in the past work; meanwhile the governing degree of words is helpful to distinguish the syntactic structures so some ill-formed structures are avoided.

词汇化方法有效地弥补了以前工作中词性信息的粒度过粗问题。同时,词汇支配度增强了对句法结构的识别,有效地避免了非法结构的生成。

In terms of the physiological characteristics of the zang organs, the physiological function of the spleen is to govern the transportation and transformation of the essence of water and grain to make qi and blood.

2.3 有些兼语式结构出现在主语中充当句子的一个成分,这种兼语式结构可以译成一个以具有动词意义的名词为中心词的短语。例如:(1)从五脏的生理特点来看,脾的生理特点是主运化水谷精微,生成气血。

In terms of the physiological characteristics of the zang organs,thephysiological function of the spleen is to govern the transportation andtransformation of the essence of water and grain to make qi and blood.

有些兼语式结构出现在主语中充当句子的一个成分,这种兼语式结构可以译成一个以具有动词意义的名词为中心词的短语夕(1)从五脏的生理特点来看,脾的生理特点是主运化水谷精微,生成气血。

In the end of this thesis, the author concludes that this series of Chinese textbook is successful because the framework of the textbook is both incorporative and separated. The whole series textbook is a tridimensional system that can not only gain knowledge and capability but also form habits and improve student"s attainments. This textbook attaches importance to course and means and pays more attention to students" autonomous learning, cooperative learning and inquiry learning.

最后作者认为该教材的成功之处有:教材结构方面,板块化和单元为序的这种有合有分的编排结构,使教材分之则眉目清楚,合之则相互为用,整套教材成为一个传授知识、培养能力、养成习惯、提高语文素养的具有整体综合效应的立体系统工程;重视"过程与方法",注重培养学习者的自主性学习、合作性学习和探究性学习的能力是本教材的另一大成功;注重内容的综合性是它在内容安排上的特色。

The Diels-Alder cycloadditions of [60] fullerene for preparation of optical limitingmaterials are discussed in chapter 3 and 6. Soluble cycloaddition derivatives of 〓aresynthesized by the reaction of 〓 with indene,1,1'-biindene andcyclopentadiene derivatives.〓Particular, the Diels-Alder cycloaddition of 〓 with1,1'-biindene under controlled conditions affords the stable monoadduct 〓〓of novel structure, which was confirmed by HPLC, FTIR, FD-MS,〓NMR,〓 NMR, HMQC and HMBC spectra, Its two bridgehead cage carbons resonate at70.91ppm, The 〓 NMR spectra showed 38 lines consistent with the 〓 symmetryassociated with [6,6] addition. The 〓 shows similar optical limitingproperties to that of 〓 in toluene for 8ns laser at wave length 532nm. Moreover, thehigh solubility of this adduct in polar solvents such as THF, acetone enables itsincorporation into sol-gel glass matrix. The thin films prepared via the sol-gel methodshow improved OL behaviour compared to those of 〓. The langmuir-Blodgett filmformation and uv-visible absorption of 〓 are also investigated. LBmonolayer of this compound is prepared on the air-water interface at 〓 mol/l. In chapter 4, three water-soluble derivatives of [60] fullerene: fullerol(1), theaddition product (2)of fullerol (1)with polyvinylpyrrolidone and fumaric acidderivative of 〓(3) are synthesized and characterized.

通过Diels-Alder环加成反应,用茚〓和1,1'-联茚〓及取代茂合成了一系列可溶性的〓环加成衍生物,发现可控制反应条件,使1,1'-联茚与〓反应,并高产率地得到具有新颖结构的单加成物,用HPLC、FTIR、FD-MS 及〓、HMQC、HMBC等多种波谱技术对其结构进行表征,测得它的两个〓杂化的桥头碳的化学位移为〓ppm,证明生成的衍生物为6∶6闭式环加成,〓NMR谱中共给出38个信号,表明〓联茚衍生物分子具有〓对称性;在波长532nm,脉冲宽度8ns的激光下,〓联茚衍生物的甲苯溶液的光限幅性能与〓的甲苯溶液相近,由于〓联茚单加成衍生物熱稳定性好,在四氢呋喃,丙酮等极性溶剂中溶解性好,能分别均匀地掺入溶胶-凝胶中,已发现它的溶胶(so1)光限幅性能优于纯〓的光限幅性能;使用Langmuir-Blodgett技术将〓联茚衍生物在空气和水的界面进行了LB单层膜和多层膜实验以及UV-Vis吸收谱研究,通过等温压缩曲线测试,证明浓度为〓〓时,〓联茚衍生物能够形成单层膜。

In this way, it has high probability of interception and broadband instantaneous frequency coverage.

本文首先推导出一种数字信道化接收机的高效结构,并与其基本结构相比较。

In order to solve the composite inversion problem of the flexible arm structure, an improved identification method is proposed by combining the relaxation method with the modified total compensation method.

为了解决悬臂型桥墩结构在输入信息未知条件下的物理参数识别问题,采用将松弛法与改进的全量补偿算法结合起来的算法,通过对参数的离散化,对输入未知条件下的-悬臂型桥墩结构的多个物理参数进行了识别。

In the mean time we also give out a reduction way for nonlinear generalized system F =0 by use of the special projection mappings Q . Based on these we prove that the qualitative structure near the isolated equilibrium point of regular nonlinear generalized system is qualitatively equivalent with the structure near the equilibriun point of the linearization system of nonlinear generalized system, so we give out a way for qualitative analysis near equilibrium point of nonlinear generalized system.

其次,对一般形式的非线性广义系统F=0,利用特殊选择的投影函数Q,给出了一种归约方法,在此基础上,并证明了正则非线性广义系统问题的孤立平衡点的小邻域的定性结构等价于其线性化后的线性广义系统平衡点的定性结构,从而为非线性广义系统的平衡点的定性分析提供了一条途径。

According to the VESs analysis, the intrinsic brittleness of Fe〓Al is due to less lattice electrons, bondcomplex distribution heterogeneity, hydrogen-induced embrittlement, and the difficulty in recovery of the lattice symmetry, while various alloying elements have strengthening and toughening effects through altering the VES parameters.

运用固体与分子经验电子理论建立起Fe〓Al合金各相的价电子结构,在计算中,首次尝试利用TFD模型确定Fe〓Al的原子杂阶,针对不完全有序的B2-Fe〓Al提出"局部平均原子模型",对Fe〓Al的室温脆性从电子理论上进行了系统的阐述,认为较少的晶格电子、键络分布不均匀、氢致脆性和难以恢复晶体的对称性使Fe〓Al具有本质脆性,合金化元素可以在一定程度上改变价电子结构参数而改善强度和韧性。

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推荐网络例句

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。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。