凸的

Based on nonsmooth analysis theory, the viability criterion is verified under the condition that the set-valued mapping in the right hand side is a polytope and the boundary function of the region is subdifferentiable and its subdifferential is a convex hull of finitely many points.

当右端集值映射为多面体，边界为次可微函数，且次微分为有限点集凸包时，基于非光滑分析理论，给出了在一点处检验生存性条件是否成立的方法。

In Chapter 2, combining two types of the preconvex part of modified Broydens family with Armijo line search, we get two algorithms for solving unconstrained optimization problems, and prove these algorithms are global and superlinear convergence under some suitable conditions.

第二章，将两种修改Broyden非凸族与Armijo线搜索相结合，得到了求解无约束最优化问题两种算法，在适当的条件下，证明了这些算法具有全局收敛性和超线性收敛性。

Our methods are based on the the surjection of maximal monotone operators and the critical point theorem of convex functionals.

本文主要利用极大单调算子满射原理和凸泛函临界点理论对半线性抛物型方程在各种控制下的能控性进行了研究。

In order to optimize the technology of press and lower the production cost,a two-stage floating elastic pressing structure at the anvil swage of the second punching die was adopted.

为优化冲压工艺，降低生产成本，第2副冲模采用了下模部分二级浮动弹压的结构，成功实现局部胀拉和翻边工艺以及压凸、弯曲、整形多道工序一次成形。

The award took the shape of an eight pointed convex cross with a mobile swastika in the center disk.

勋章采用了指向八个方向的凸面十字并有一个万字于中心。

To investigate whether syrinx should by treated before correction in patients with scoliosis complicated by syringomyelia without neurologic impairment.

探讨伴脊髓空洞症的脊柱侧凸患者在无神经症状且达到矫形指征时应否于矫形之前对脊髓空洞进行外科处理。

Furthermore, it is shown that this condition is equivalent to the solvability problem of a system of linear matrix inequalities, and its solutions provide a parametrized represent...

在此基础上，通过建立并求解一个凸优化问题，给出了最优保性能控制律的设计方法。

The relative motion of the two contacting surface is simply decomposed into one component: tangential component on the contact plane.

只考虑相邻叶片凸肩接触面切向运动，简化并建立一维含间隙干摩擦模型，分析得出干摩擦力的数学表达式并做出其迟滞曲线。

That the cam-bore to valve/tappet dimensions are gauged with the head bolted to the block.

校对凸轮孔到气阀/凸子的距离时，顶盖已被螺钉固定在机体。

The spring portions and a flange portion of the holding member cooperate together to clamp the bumper therebetween.

弹簧部分和保持构件的凸缘部分一起配合工作以便将安装目标夹紧于其间。

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％。