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面基准
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  surface reference
     The agreements of coordinate transformation with inverse transformation, "entrance pupil" with light ray coordinate, image surface reference with quality function defintioa are described for the computer optimization of noncoaxial optical yatem.
     描述不共轴光学系统计算机优化中坐标变换与逆变换、“入瞳”与光线坐标、像面基准与质量函数定义的一致性问题。
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     and then digital terrain model can be generated.
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  surface reference
A surface reference sensor located on the roof of the Marine Station at Helgoland recorded values every 5?min, and an equivalent profiling underwater sensor was used for measurements in the sea at approximately monthly intervals.
      
The problem of determining a surface reference in coarse sediment is highlighted.
      
The absolute accuracy of the estimates is difficult to assess because surface reference data are difficult to come by, especially over ocean.
      
The surface reference depth chosen in this study for the MLD criterion is 10 m.
      


Sedimentological and micropalaeontological investigations on sixteen boreholes in Hong Kong waters reveal the following stratigraphy:

研究了香港海域16口钻井的岩心的沉积学和微体古生物学后,将它们划分为以下地层: (1)全新世海相沉积(最老的~(14)C年龄为距今8080±130年); (2)最后冰期陆相沉积(~(14)C年龄为距今8520±270—<30000年); (3)含有红树植物孢粉的最后间冰期海相沉积(~(14)C年龄距今30560±580—36230±_680年)。 (4)中玉木冰期的陆相沉积; (5)?含放射虫的第二最后间冰期海相沉积; (6)?前第二最后间冰期的陆相沉积。 在最后间冰期时期,海平面至少低于基准面(基准面:大约低于平均海面115米)9米。微体古生物的证据表明,当时的年平均温度高于现今。

The agreements of coordinate transformation with inverse transformation, "entrance pupil" with light ray coordinate, image surface reference with quality function defintioa are described for the computer optimization of noncoaxial optical yatem.

描述不共轴光学系统计算机优化中坐标变换与逆变换、“入瞳”与光线坐标、像面基准与质量函数定义的一致性问题。

An object oriented model of building is presented in this paper where a series of decomposition among objects is carried out.A virtual face and a datum point which embody basic semantics requirements are two low level objects.They hold not only geometric data,but also topololgy relation.The first is used to construct wall faces,spaces and solid primitives and the second constructs wall line and corner point of a space.The paper also shows that in an object oriented approach topology connection among objects...

An object oriented model of building is presented in this paper where a series of decomposition among objects is carried out.A virtual face and a datum point which embody basic semantics requirements are two low level objects.They hold not only geometric data,but also topololgy relation.The first is used to construct wall faces,spaces and solid primitives and the second constructs wall line and corner point of a space.The paper also shows that in an object oriented approach topology connection among objects is more flexible and less dependent than in the case of structurebased model.

本文针对建筑问题域,建立了对象之间存在组装、分解关系的对象模型。通过对问题域最基本需求的抽象,提出了两个反映基本需求的对象:虚面、基准点。其特点是,除了几何描述外,二者皆有灵活的拓扑描述能力,前者是墙面、空间、体的构造基础,后者是二维墙线、空间的基本构造对象。文章的最后还论述了采用面向对象的建模技术可构造更加灵活的拓扑关系,减弱拓扑关系之间的依赖强度

 
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