《庚道集》中“定”的语法化等级考察

谓语动词"定"在《庚道集》中通过语法化,主要作述补式结果补语以及表完成态的动相补语。在"V定"和"V定O"格式中,当V是造成"稳紧"义的动作动词时,"定"的语义特征更倾向于表示结果补语。"定"作动相补语可与动词和形容词结合,但与动词的组合能力不强,对所黏附的动词具有选择性。     

临床X射线相衬成像研究进展

X射线相衬成像在提高人体软组织成像的衬度分辨率及空间分辨率研究中具有潜在优势,是一项有着广阔发展前景的技术。它利用空间相干X射线投过物体后携带的相位信息进行成像,在临床上适用于软组织物体,可以减少吸收剂量,进而减轻病人的辐射损伤。本文详述了当今几种典型的X射线相衬成像方法,包括X射线干涉相衬,衍射增强相衬以及类同轴相衬的成像原理以及发展历程。通过对比表明了几种成像方法的优缺点。最后对临床X射线相衬成像有待解决的问题作了分析。     

民国成渝铁路土地征收问题考察

1936年成渝铁路征地工作开始,为了顺利实施土地征收,四川省政府特别设立铁路征地机关,并制定了组织章程、征地程序和土地补偿标准等,至1937年底征地工作基本完成.从征地的行政补偿与实际行政程序来看,存在着严重失衡与失位,造成被征地人的利益受损.     

Numbers of children looked after in England: a historical analysis

This paper is an analysis of the relationship between policy, practice and the rates of children looked after by local authorities in England. It examines the trends in the numbers of children looked after by local authorities in England over a period of approximately 40 years. The increase in children looked after in the decade after 1994 is shown to be the result of fewer children entering care, but those that do tend to stay longer. This two-part dynamic appears to have been the underlying determinant of the care population over a long period of time. The fact that time spent in care is such a key factor suggests that planning for children who are already looked after is a crucial determinant of the numbers in care. However, it is argued that poorly developed family support services limit current options for reducing the size of the care population. A range of effective family support services could potentially have an impact on the number of children in care in three ways: by helping to maintain more children within their families; by identifying those children who need care earlier; and by improving the chances of some children being successfully returned home.     

中国艺术观念中的"幻"学说

幻是中国艺术观念中的一个大问题,中国艺术有从幻境界入门的思想,表达了追求生命真实的审美理想。本文从幻化、幻有、幻相三个方面探讨这一问题,对中国艺术中与此相关的一些观念作了梳理,     

CMOS环型压控振荡器的设计

设计和分析了一种高稳定度、低噪声的CMOS环型压控振荡器。该电路具有较低的压控增益,较好的线性范围,较低的相位噪声。应用复制偏置电路,对差分环型压控振荡器的控制电压进行复制,通过对压控振荡器相位噪声的计算和分析,以提高对环型压控振荡器电源电压噪声和衬底噪声的抑制。该设计和分析是基于上华0.5μmCMOS工艺,当控制电压从1～3V变化时,相应的振荡频率为100～500MHz;在偏离中心频率1kHz、10kHz、100kHz和1MHz频率处得到的相位噪声分别为?50dBc/Hz、?75dBc/Hz、?98dBc/Hz和?120dBc/Hz。     

Using intersection matrices to identify graphical structure

Intersection matrices help identify the common graphical structure of two or more objects. They arise naturally in a variety of settings. Several examples of their use in a computer algebra environment are given. These include: simplifying an expression involving array products, automating cumulant calculations, determining the behaviour of an expected value operator and identifying model hierarchy in a factorial experiment. The emphasis is placed on the graphical structure, and the symmetry of arrays help reduce the complexity of the graphical problem.     

衍射光学元件的CAD方法

提出了利用计算机来设计制作衍射光学元件的方法 .首先利用Y—G算法计算所需的衍射光学元件的位相分布 ,并利用计算机把它转化成灰度分布图 ,然后缩微制成胶片 ,最后利用胶片作为模版进行大批量制作     

对称陀螺分子光谱中的几何相因子

导出了对称陀螺分子体系在演化过程中的 Berry和 Aharonov- Anandan相因子 ,这类相因子的存在 ,将影响分子的振动和转动能量 ,使光谱发生变化 .     

欧盟东扩的阶段划分及其对国际政治产生的影响

盟东扩使欧盟成为全世界最大的区域经济体和全球最大的自由贸易区,对当今世界政治经济格局也带来了极为重要的影响。文章首先将欧盟东扩的进程划分为两个阶段,然后分别对每一阶段进行了探讨,最后剖析了欧盟东扩对国际政治产生的影响。