凸面的

Under the assumption that the constrained set is bounded and nonempty , we discussed the geometric properties of the feasible set for MFBLP model and Optimality conditions of MFBLP .

在约束集为非空有界的前提下讨论了可行集的几何性质，得到了可行集为约束集的若干个面的并，可行集为弱拟凸集等一些较好的几何性质。

For a finite-security and finite- state financial market with three forms of friction: ask-bid spread, transaction costs and tax, by using the theory of convex analysis and some optimization techniques, a series of necessary and sufficient conditions are established to characterize weak and strong no-arbitrage respectively.

对存在买进卖出价差、交易费和税收三种摩擦和有限个可能的自然状态的金融市场，利用凸分析理论和最优化技术刻划出了强无套利和弱无套利的一系列充要条件，以往许多这方面的结果均是我们的特例。

If an object sliding along the contact surface, the two of the contact surface of the convex part of the collision, a fracture, wear, created obstacles to the movement.

如果一个物体滑动沿接触表面来看，两者的接触面的凸角部分的碰撞，断裂，磨损，制造障碍，把运动。

In this paper, interval models in the convex models are used to describe the parameters having uncertain but boundary limits such as stress and load. The shortest distance from coordinate origin to failure surface in the expand space of standardized interval variables is chosen as the non－ probabilistic reliability index.

将具有不确定且有边界限制的应力、载荷等用凸模型中的区间模型来描述，取在标准化区间变量的扩展空间中，从坐标原点到失效面的最短距离作为非概率可靠性指标。

According to principle of spatial mesh, this paper derives synthetical equations of cylindrical indexing cam surface.

根据空间啮合原理，推导了圆柱分度凸轮廓面的综合方程式。

Necessary and sufficient conditions for convexity preserving of developable surface patches are presented.

文中对计算机辅助设计技术中常用的可展面进行了保凸分析，利用该结论可以轻而易举地判别和控制可展面的形状

Though the analysis of the convexity of the front surface, this paper gained some terse and practical results.We can control the shape of developable surface through adjusting corresponding plane curves.

本文通过对上述两种可展B样条曲面进行保凸分析，得到了一些简洁，适用的结论：只要调整相应平面曲线，就能控制可展面的形状。

In the second half of the seventeenth century, therefore, the Galilean telescope was replaced for terrestrial purposes by the "terrestrial telescope," which had four convex lenses: objective, ocular, erector lens, and a field lens (which enlarged the field of view even further).

在下半年的十七世纪，因此，伽利略望远镜取代地面的目的，由"地面望远镜，"其中有四个凸镜头：目的，眼，竖镜头，和野战镜头。

The user presses one lobe (112) for an aspirating stroke to rotate the plunger shaft (48) in one direction and align the stop pin (52) with uppermost lower stop (104) for a relatively short aspirating stroke and the user presses the other lobe (114) for a dispensing stroke to rotate the plunger shaft (48) in the other direction and align the stop pin (52) with lowermost lower stop (106) for a relatively long dispensing stroke.

用户按压用于吸取冲程的一个凸耳(112)，以便使柱塞杆(48)沿一个方向旋转，并使止动器销(52)与用于相对较短的吸取冲程的最上面的下部止动器(104)对齐，而用户按压用于分配冲程的另一凸耳(114)，以便使柱塞杆(48)沿另一方向旋转，并使止动器销(52)与用于相对较长的分配冲程的最下面的下部止动器(106)对齐。

On applying the theory of differential geometry, the research shows the procedure for determining the required cutter path for cutting conical cam profile using a NC milling machine based on the analytical profile expression of conical cam with oscillation conical roller follower or with a translating conical roller follower established in 3D space. The analytical expression of cutter path is provided for a tapered endmill cutter, whose size may be identical to or smaller than that of the conical roller.

应用微分几何理论，以在3维空间所建立的圆锥滚子摆动从动件和直动从动件圆锥凸轮机构凸轮廓面的解析表达式为基础，对数控铣床加工圆锥凸轮廓面所需刀具轨迹方程的建立方法进行了研究，根据所采用的锥形刀尺寸等于或小于圆锥滚子尺寸的情况，推导出相应的刀具轨迹方程的解析表达式。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。