1) like-projective pencil of circles
类射影对应圆束
1.
Twoformation methods are studied: the inverse transformation of conics and the intersection oftwo like-projective pencil of circles.
提出并研究了它的2种构成方法──圆锥曲线的反演变换法和类射影对应圆束相交法；给出了类射影对应圆束的定义和2种构成法的实例及计算机图形。
2) projective correspondence
射影对应
1.
Discussion of two-dimensional projective correspondence and perspective correspondence;
二维射影对应与透视对应的探讨
2.
As two-dimensional projective correspondence of pencil of planes derives from one-dimension projective correspondence of pencil of lines in space field,this paper discusses a new method about how to form quadratic straight surface and the relational expression between the two projective correspondences of pencil of planes.
由平面场的一维线束射影对应衍生出空间场的二维面束射影对应,研究了直纹二阶曲面射影生成新方法。
3.
To decide whether a projective correspondence is a perspective correspondence plays a very important role in projective geometry.
射影几何中的透视对应是射影对应的一种特殊而又基本的对应,要判断射影对应是否为透视对应,在射影几何中处于十分重要的地位,本文主要用代数的方法给出了同类不重叠的一维、二维基本形的射影对应为透视对应的条件。
3) projectivity
射影对应，射影
4) plane projective correspondence
二维射影对应
1.
The relations plane projective correspondence and perspective correspondence;
二维射影对应与透视对应的关系
5) projective pencils of lines
射影线束
1.
This essay discusses the pencils of lines resolution and the trajectory of what the projective pencils of lines composes, and tries to find a method for the point intersection between conic section and straight line .
本文从射影观点出发讨论圆锥曲线的线束分解和此射影线束构成的轨迹,并提出求圆锥曲线与直线交点的一种方法。
6) corresponding elements of projective forms
射影型的对应元素
补充资料：粪类圆线虫病
| 粪类圆线虫病 strongyloidiasis stercoralis；threadworm 由粪类圆线虫寄生于人体肠内引起的疾病。成虫主要寄生在十二指肠和空肠上部的粘膜内，引起类似溃疡病的疼痛，也可有腹泻及腹痛；虫卵在粘膜内孵出幼虫，进入肠腔随宿主粪便排出体外，并在土壤中发育为感染期幼虫，俟机钻入人体皮肤，此时局部皮肤有痒感及红疹；幼虫经血液循环至肺脏，可引起肺炎，痰中偶可找到幼虫；又经咽部而进入小肠上部，侵入粘膜内发育成熟、产卵；有时幼虫也可在肠腔内发育为感染期幼虫，引起自身感染；在免疫低下的患者则可因自身感染而引起暴发性重症感染，在肠道引起溃疡、坏死甚至穿孔，肺部病变也较严重，可出现呼吸困难、咳血、青紫等现象，甚至可侵犯中枢神经系统而引起昏迷或死亡。诊断依据粪便中找到幼虫。丙硫苯咪唑驱虫有效。 |
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参考词条