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ABSTRACT This paper summarizes our researches on two key techniques in curve and surface modeling-the geometric approximation techniques and the geometric interpolation techniques. The former includes three types of geometric approximation techniques: Hybrid polynomial approximation to rational curves and surfaces, offset curves and surfaces approximation, interval Bézier curves and surfaces approximation. The latter includes a series of algorithms for shape blending modeling: the MSI algorithm for shape blending between space polylines or trees, the MSI algorithm for shape blending between triangular meshes, and skeleton-based shape blending algorithms using triangular decomposition and star-shape decomposition.

本文是作者对曲线曲面造型中两类核心技术几何逼近技术和几何插值技术的研究成果的总结，其中前者包括有理曲线曲面的Hybrid多项式逼近、等距曲线曲面逼近和区间曲线曲面逼近等三类几何逼近方法；后者包括用于形状混合造型的几何插值方法的一系列算法：空间多边形形状混合的MSI插值算法、三角网格形状混合的MSI插值算法、树的形状混合的MSI插值算法以及基于骨架树形状混合的三角剖分算法和星形剖分算法。

Table 2-2 in Section 2.2.2 summarizes the relative triboelectric effects of various insulating materials.

2.2.2节的表2-2摘要地列出了各种绝缘材料之间摩擦电效应的相对关系。

As the complete characteristic curves of reversible pump turbine are often used to calculate the instantaneous parameters, this paper studies the characteristic curve and the wicket closure and opening law in pumped storage plants.Chapter 1 presents the importance and the necessity of this study and reviews the previous related research on hydraulic transient process and valve regulation in pumped storage plants.Chapter 2 analyzes the six collected characteristic curves of reversible pumped turbine and studies their diversification from the point of view of specific speed. The six collected discharge and moment curves with maximum efficiency have been fitted to piecewise continuous curves. This curve-fitting procedure is listed.Chapter 3 takes Liyang Pumped storage plant as an example and analyzes the effect of different characteristic curves on regulation guarantee parameters and the variety of its trochoid during the same operation status.Chapter 4 takes three pumped storage plants with different heads as examples and studies the characteristic of coordinated closure with wicket gate and ball valve and its effect on dynamic pressure in the spiral case, inlet pressure in the draft tube and the rise of rotating speed.Chapter 5 summarizes this paper and point out what should be done in the future research.

由于在过渡过程分析计算中，需要频繁利用可逆式机组的全特性曲线推求机组的瞬时参数，所以本文就特性曲线及关闭规律问题进行了研究，其主要内容如下：第1章，指出本文研究的意义和目的，回顾前人对水力过渡过程、抽水蓄能电站及阀调节的研究成果，在此基础上提出本文的研究内容；第2章，针对收集到的六套特性曲线，从比转速的角度出发来研究可逆式机组特性曲线的变化规律；并对六套曲线的最高效率流量和力矩曲线进行分段拟合，得到各分段函数的具体形式，再通过举例说明最高效率曲线的拟合步骤；第3章，以溧阳抽水蓄能电站为实例，分析讨论不同比转速特性曲线对调保参数造成的影响及对于相同工况其轨迹线的变化；第4章，结合高、中、低三水头段抽水蓄能电站，在导叶直线关闭的基础上，研究导叶与球阀协联关闭规律的特点及对蜗壳动水压力、尾水管进口压力及转速上升造成的影响；第5章，总结全文，提出今后研究的重点和方向。

The author analyses and summarizes Trudeau s role in Canadian foreign history at last.

简单评价特鲁多在加拿大外交史上的重要地位。

In addition ,the historical achievements and lessons of TVA will be summarized. The conclusion summarizes the whole paper.

结语部分阐述了TVA所体现出的政府干预思想，并提出了对田纳西流域成功治理的一些思考。

Then it summarizes the literatures under the structure. The content includes:(1) the regulation issues in the process of information disclosure, including the explanations of information disclosure control, research of the accounting systems, the mechanism of regulation and legal responsibility;(2) supply of information disclosure, composing accounting policy research and unconstraint disclosure research;(3) research of information intermediaries, including auditors and financial analysts;(4) research on the results of information disclosure, mainly on the reaction of constraint and unconstraint information disclosure.

然后，按照此框架，对信息披露的研究文献进行综述，包括：①信息披露中的监管问题，包括信息披露管制解释、会计制度选择研究、监管体系及法律责任研究；②信息披露的供给问题，包括会计政策选择研究、自愿性披露研究等；⑧信息中介的研究，包括审计师、财务分析师等信息中介研究；④信息披露后果研究，包括强制披露的市场反应研究和自愿性披露的市场反应研究。

Firstly, it summarizes the general evolution history of organic electronics, introduces several key devices of organic electronic devices, such as OLED, organic unimolecular electronic, organic sensor,et al., their development and actuality.

首先综述了有机电子学的发展概况，介绍了有机电子器件中几种关键的器件如有机发光器件，有机光电探测器，有机单分子器件，有机传感器等，以及发展概况、目前现状等。

The researcher summarizes three major conclusions as follows. First, 88% of library users suggest the purchase of library materials by utilizing the union catalog, a bibliographic database of ISBNnet, developed by the National Central Library of Taiwan. This method helps increase the reservation of new arrivals on the New Book Display, from the rate of 1.48% to 5.59%. Evidently, the use of the union catalog of ISBNnet as the bibliographic source of library acquisition improves the quality of library collection. Second, with the launch of the Book Recommendation System, it requires only a single staff to deal with the duplication check of book copies; meanwhile, it reduces dramatically the chances of careless purchase of multiple copies of a single work from the rate of 31.23% to 3.53%. Finally, the acquisition model of Inter-Entity Supply Contract shortens the lead time from some time between 55 and 90 days to 36 days in the library acquisition procedures.

对於以行动研究应用於台东大学图书馆图书采购流程之变革，以及从而开发出「台东大学图书馆中文新书荐购系统」之使用状况，研究者提出四点结论：(1)有88%的读者利用全国新书资讯网的联合出版书目荐购给图书馆；新书展示被预约率由1.48%提升到5.59%，显见利用联合出版书目做为图书采访来源，有助於馆藏品质的提升；(2)图书馆导入e化服务，一个人即可处理最繁杂的复本查核，同时让复本率由31.23%降低到3.53%，节省人力成本的支出；(3)中文图书共同供应契约的采购模式，新书进馆时程由55-90天缩短到36天；(4)行动研究法应用於图书馆业务改善，确实有效提升图书馆的服务品质及效能。

Unionize the analysis of the inside and outside factors of restricting the electronic commerce development of enterprises, this paper summarizes the main existing problems electronic commerce development in this area, and proposes countermeasures of developing electronic commerce for the enterprises in Beijing Area, such as the government should play an positive role, the legislation should be speeded up, the enterprise should strengthen internal information construction and so on.

结合对制约企业电子商务发展的内外因素分析，总结该地区电子商务发展存在的主要问题。提出北京地区企业电子商务发展的对策，包括政府发挥积极作用、加快法制建设、企业加强内部的信息化建设等。

Firstly, this thesis summarizes the current situation of research about Liheci, in order to discover unresolved problems.

首先，本文综述了"离合词"的研究现状，发掘有待解决的问题。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。