In seedling stage (4 leaf stage),jointing stage,and milk stage the linear relationship between individual leaf area and total plant biomass (fresh weight or dry weight)on ground of white Horse Tooth maize (Zea may L)were studied.
）单叶面积与单株地上生物量（鲜重或干重）的回归方程。
The article has described the simplicity machining method of the tilted edge fingerlike gear cutter with uniparted hyperboloid matching tooth shape and the straight generatrix of the uniparted hyperboloid as the blade curve.
介绍用单叶双曲面拟合齿形,以单叶双曲面的直母线作刀刃曲线,用普通工具磨即可完成的斜刃指状齿轮铣刀的简易加工方法。
This article not only discusses the ruled surface features of uniparted hyperboloid and its application in archtecture engineering but also discusses the teaching of the ruled surface.
本文主要讨论了单叶双曲面的直纹性,指出它在建筑工程中的应用,并对直纹面的教学作了探讨。
It is proved that the surface organized by all the straight lines which are coplanar with three u-family rectilinear generators of an uniparted hyperboloid,which are not coincident with each other,is exactly the primal uniparted hyperboloid.
证明了与单叶双曲面上3条互不重合的u族直母线均共面的直线所构成的曲面正好是原单叶双曲面。
Potential distribution of charged conductorwith surface of hyperboloid of one sheet;
表面为单叶双曲面带电导体的电位分布
From the hyperboloid of one sheet of special section line,the article analyzes its property of ruled surface and deduces the parameter equation of another trigonometric function form,which agrees with the definition of the ruled surface.
从单叶双曲面上特殊截线出发,说明单叶双面的直纹性,导出单叶双曲面的另一种三角形式的参数方程。
The paper proves that the surface normal,which is followed by rectilinear generators on hyperboloid of on sheet,comstructs the hyperbolic paraboloid generated by two same parabola,when rectilinear generators go through the vertex of waist ellipse,and it also deduces that the hyperboloid of one sheet is constructed by surface normal through a certain rectilinear generator.
证明了当单叶双曲面的直母线过腰椭圆顶点时,沿着它的曲面法线构成一个由二全等抛物线生成的双曲抛物面,并推导出对单叶双曲面,沿着它的任一直母线,曲面的法线均构成双曲抛物面。
Dynamic simulation models using logistic regression equations for plant leaf-area and plant aboveground air-dried weight over time were established.
结果表明,4个大豆品种的单株叶面积随时间的变化动态可以用修正的logistic曲线^y=k(1+ea+bt+ct2+dt3)-1来拟合。
minimum ellipse of a hyperboloid of one sheet
单叶双曲面的最小椭圆
Projectivity of Hyperboloids of One or Two Sheets;
双曲抛物面与单叶双曲面的射影性质
The authors show that the hyperboloid of one sheet and the hyperbolic paraboloid are ruled surfaces.
作者证实：单叶双曲面和双曲抛物面是直线曲面。
Research on the One-Sheet Hyperboloid Cylindrical Cutter with Flat Surface and Straight Edge;
单叶双曲面平板直刃滚筒式切碎器的研究
On the Property of Locus Mutual change about Spherical Surface and Hyperboloid of the One Sheet of Revolution;
关于球面与单叶旋转双曲面的一个轨迹互变性质
Design Principle for the Inner Cavity of One Sheet Slewing Hyperboloid of Axle Suspension Bush on Tractive Motor
牵引电机抱轴瓦单叶回转双曲面内腔的设计原理
All points such as ??and ?? lie on a surface of two sheets.
所有象?缓旺?这样的点都位于一个双叶曲面上。
Testing Study on the Roof Structure of a One-layer Shell of the Hyperboloic Paraboloid
双曲抛物面单层网壳屋盖结构试验研究
Elasto-plastic stability of single-layer elliptic paraboloidal reticulated shells
单层双曲椭圆抛物面网壳弹塑性稳定性能
Light green, small, round, thin, glossy, soft, velvety, tightly bunched/ pale back; randomly curved petioles. Usually single crown.
亮绿色小而圆的薄叶，叶面光滑柔软，植株紧密，浅色叶背，叶柄常有弯曲。通常是单个顶芽形态。
hyperboloidal gear
双伞齿轮，双曲面齿轮
Singularities of Parallels for Hyperbolic Plane Curves
双曲平面曲线的平行曲线的奇点分类
sheet-fed single colour perfector
单张纸双面单色胶印机
hypoid generator
准双曲面齿轮加工机床
binodal cyclide
双结点四次圆纹曲面
The Calculation on RCS of Double Curved Surface Based on NURBS
基于NURBS建模双曲率曲面RCS计算
Hierarchical B-spline Surface Fitting of Turbine Blades
涡轮叶片叶面B-spline曲面层次化拟合方法
Individual Tree Height-diameter Curves of Larch-spruce-fir Forests
落叶松云冷杉林单木树高曲线的研究