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We propose that the thiol end-groups generated during the aminolysis of PMMA tend to cyclize through "backbiting" to form thiolactone structure.

我们用GPC、MALDI-TOF MS、一维二维NMR、元素分析等方法对氨解过程和氨解产物做了详细的表征。

The one-dimension Terzaghi consolidation differential equation with boundary conditions,in which the top is drainable and the bottom is undrainable was solved,and the solutions obtained from several different references were analyzed.

解答了顶面不排水、底面排水边界条件下的太沙基一维固结微分方程,并比较分析了不同坐标系统下、不同边界条件下的单面排水太沙基一维固结微分方程的解答。

With the development of technology, the one dimension barcode can no longer meet the social needs because of its limitary information capacity and dependence on data-base, so the various 2-D barcodes come into use and generalization among which the PDF417 barcode is most widely used.

随着科技的发展,一维条码由于受到信息容量的限制和使用时对数据库的依赖,在很多场合已不能满足需要,于是二维条码得到推广和使用。在众多二维条码中,PDF417条码的应用最为广泛。

The model is proved by the numerical simulation of three engineering cases. The SMA superelastic damper of tension-pressure type is introduced. The design and the working principle of the damper are outlined.

采用本文的形状记忆合金一维超弹性本构关系模型对工程算例进行了数值模拟,试验和数值模拟结果表明,本文的形状记忆合金超弹性一维本构关系模型,能够比较真实地模拟NiTi形状记忆合金在温度和应力作用下的受力性能,并且形式简单,计算方便,可满足工程应用要求。

The main contributions of this thesis are:(1) Seven mononuclear complexes of tetradentate ligand NTB have been obtained using N〓 or SCN〓 as the additional ligand;(2) Seventeen binuclear complexes of Fe , Zn , Co , Cu have been designed and the complexes of Co , Cu exhibit antiferromagnetic properties;(3) Changing the bridged-ligand such as PO〓, CO〓, o-phth, mai, Ag (CN 〓, Au 〓, etc , fourteen tetranuclear complexes of polypridine ligand have been synthesized;(4) Two antiferromagnetic 1D chain complexes of KH〓pdc ligand have been prepared from hydrothermal reactions; in addition, one ferromagnetic 1D chain copper complex of tpdp which is bridged by oxalate has been obtained.

本论文的主要贡献为:(1)合成了配体NTB的七个新型单核配合物;(2)合成了十七个铁、锌、钴及铜系列混桥双核配合物,其中双核钴和双核铜配合物为反铁磁偶合;(3)选用多吡啶配体tpdp和TPA,改变桥联配体,合成了十个四核配合物;(4)选择配体KH〓pdc,采用水热合成方法得到了反铁磁性一维链状锰、铜配合物;以草酸根为桥联配体,合成了配体tpdp的一维链状铜配合物,该化合物为铁磁偶合,文献较少报道。

Replacing DETA with PIP, a new three dimensional compound 3 issynthesized and the 3D anionic framework of compound 3 is constructed from twodistinct motifs, a one-dimensional tancoite chain and a single 4-ring (S4R) unit,which contains four intersecting channels running throughout the structure as 8,12-member ring channels along to the a axis and 12-member ring channels along theb and c axis, respectively.

其中,以乙二胺为模板剂的亚磷酸铟微孔化合物具有无限的共边4员环一维链状结构;以哌嗪和1,6-己二胺为模板剂合成出的亚磷酸铟化合物分别具有二维交叉8员环孔道和16员环孔道的三维开放骨架结构。

Since a 1D bar code reader is generally manufactured for a market that experiences brisk operations, it is easy to assume that the sheer transportability of these portable 1D bar code readers make them more appealing to their target audience.

由于一维条码阅读器通常是制造市场经验旺盛行动不难推断,纯属可移植性这些便携式维条码阅读器,使之更具吸引力他们的目标受众。

This paper presents an alternative way to transform the double integral in elasticity problem on 3-d into the linear integrals on the boundary of each subdomain, so that all the singular integrals and nonsingular integrals are calculated by analytical method.

采用积分区域变换和高斯定理,将三维弹性问题的二维积分化为一维积分,使奇异积分和非奇异积分能使用精确积分的方法计算,为边界元奇异积分的计算和处理提供了新的思路。

The abilities of strongly detonating explosive slab in driving metallic flyers to high speed are shown in our calculation model.

在平面一维假定下,应用气体动力学的一维推体公式和推广的Gurney公式对次级飞片的速度进行了计算。

The formula for unitizing is derived theoretically , which can be used as the foundation to determine the measuring light points in skirt circuit design .

介绍了新型传感器PSD在一维空间和二维空间的检测原理,并以理论推导的方式给出了归一化公式,来作为设计外围电路检测光点位置的依据。

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推荐网络例句

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。

There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.

双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。