On the other hand, a positive curvature would imply that three-dimensional space is finite and closed.
另一方面，一个正的曲率将必然说明三维空间是有限的，而且是封闭的。
As to Balilla erect panicle type, (the same subject for the following 11-16), the curvature of panicle neck had a very significantly positive correlation with panicle length, neck panicle length, neck panicle internode length, the secondary internode length, leaf length and leaf sheath length, and had an opposite correlation with leaf width and density of seed setting.
对巴利拉型直立穗型品种来说（以下11～16同此所指），颈穗弯曲度与穗长、穗颈长、穗颈节间长、倒2节间长、叶长、叶鞘长呈极显著正相关（倒3叶呈显著正相关），与叶宽、着粒密度呈极显著负相关。
The difference is due to the positive curvature of the surface.
不同之处就在于表面的正曲率。
This thesis presents a new curvature-compensated bandgap voltage reference; the circuit uses the voltage control resistance of an NMOS operated in the triode region to generate a nonlinear dependence with positive temperature coefficients because the electron mobility decreases as the temperature increases.
本论文提出一个新架构来降低非线性项的影响。我们利用 NMOS 在三极区工作时其可视为一压控电阻；此电阻值在闸源极电压不变时由於电子迁移率随温度增加而降低，因此电阻值之随温度变化是正温度系数但是非线性。
As a result, the curvature of the color selection electrode is increased, which has a positive effect on the strength, doming and microphonics of the color selection electrode.
这样一来，色彩选择电极的曲率就变大了，这对色彩选择电极的强度，凸起和颤躁效应都有良好的作用。
The exponent of each item was discovered based on the optimizing the diagram factor, minimum radius of the cam curvature, maximum positive and negative accelerations of valve.
对于每一项的指数，则采用对气门运动加速度、丰满系数、最小曲率半径等优化的方法来寻求。
When the Hessian matrix is indefinite, we consider negative curvature direction as search direction; when the Hessian matrix is positive definite, we consider Newton's direction as search direction.
当最优化问题的海赛阵不正定时，由于算法的分解保留了海赛阵的负特征值，因此可用负曲率方向作为搜索方向；当海赛阵正定时，就用牛顿方向进行搜索。
Hausdorff convergence; almost nonnegative Ricci curvature; Betti number; harmonic 1-form; nilpotency; splitting theorem; positive sectional curvature; gradient curve
基础科学，数学，几何、拓扑Hausdorff收敛；几乎非负Ricci曲率；贝蒂数；调和1-形式；幂零指标；分裂定理；正截面曲率；梯度曲线
Here'too small'means that the length of v=0 section is smaller than l(ρ0)or the length of|v|=1 section is smaller than l(1+ρ0), and ρ0is the upper-limit of the curvature of thepart of the Riemann nanifold which the car can reach, l is a positive-valued function.
这里所谓`长度过小`是指v＝0段长度小于l(ρ0)或|v|＝1段长度小于l(1+ρ0)，其中ρ0是小车能达到范围内曲面曲率的上界，l是正值一个函数。
In this paper, some properties of totally real and totally umbilical submanifolds of a complex projective space are obtained. We also prove that a compact totally real submanifold with positive curvature and parallel mean curvature vector of a complex projective space must be pseudo-umbilical.
获得了复射影空间中全实全脐子流形的若干性质，并且证明了复射影空间中具有平行平均曲率向量的正曲率紧致全实子流形必是伪脐的。
According to distribution patterns of the maximum principal curvatures changing from small to large, from negative to positive, this paper proposed a maximum principal curvature hill climbing method for the sulcal basins segmentation of the cortical surface.
针对大脑皮层表面最大主曲率从脑沟到脑回由小变大，由负变正的分布规律，提出了一种最大主曲率爬山法来对大脑皮层脑沟盆地进行分割。
The Existence of Riemann Metric with Positive Scalar Curvature over Complex Hypersurface
关于复超曲面上具正数量曲率之Riemann度量的存在性
Corollary 2.1 Let M be a compact conformally flat space, dim (M) > 3. If M has constant scalar curvature and positive sectional curvature, then M is of constant curvature space.
推论2.1令M（dimM>3）为紧致共形平坦流形，如果M有常纯量曲率和截曲率，则M是常截曲率空间。
Among them there were 40 cases with lumbago, 39 cases with lumbar lateral curvature, 40 cases with the straight leg-raising maneuver test with positive results;
腰痛40例，腰侧弯39例，直腿抬高试验阳性40例；
Some patients have few symptoms but all patients have apparent physical signs, lateral curvature and reverse of the physiological curve often been seen, the straight-leg lifting test always proved to be strongly positive.
有的患者症状很少，但查体均有明显体征，主要表现为腰椎的反弓、侧弯等畸形改变，直腿抬举试验低于30°；
A Differentiable Sphere Theorem with Positive Ricci Curvature
具有正Ricci曲率流形上的一个微分球定理
In this paper we discuss the existence of Riemannian metrics with positive scalar curvature over the complete intersection of two non-singular complex hypersurfaces in CP~(4k + 3).
本文旨在讨论CP~（4k+3）中两个非奇异复超曲面的完全交上正数量曲率度量的存在性问题。
In this paper we discuss the existence of Riemannian metrics with positive scalar curvature over the complete intersection of two non-singular complex hypersurfaces in CP ~ (4k + 3).
本文旨在讨论CP~（4k+3）中两个非奇异复超曲面的完全交上正数量曲率度量的存在性问题。