必要条件

Based on these and by the theories and methods of parametric programming, nonsmooth analysis and nonlinear analysis, the necessary and sufficient optimality conditions of cone efficient solutions for the model were obtained.

利用参数规划、非光滑分析和非线性分析的理论和方法，获得了模型锥有效解存在的最优必要条件和充分条件。

There is an ever increasing demand for the on-board Internet access from the passenger train.

旅客列车 Internet 应用的需求日趋强烈，而铁路沿线的无线宽带覆盖是实现旅客列车 Internet 应用的必要条件，也是当前的研究热点。

A study on the essential condition and development path of the difference strategy of cities is in this context.

探讨差异化战略作为21世纪城市在全球化背景下发展路径的可能性，通过建立差异化模型对城市发展战略竞争绩效进行分析，研究了实施城市差异化发展的必要条件和途径。

The difference model will be used to analysis the competition of cities .A study on the essential condition and development path of the difference strategy of cities is in this context.

探讨差异化战略作为21世纪城市在全球化背景下发展路径的可能性，通过建立差异化模型对城市发展战略竞争绩效进行分析，研究了实施城市差异化发展的必要条件和途径。

What the innovation of the system brings market range is patulous, of market limits the requirement that expanding is development of division of labor.

制度的创新带来市场范围的扩展，市场范围的扩展又是分工发展的必要条件。

This paper starts from informing construction, researched the problem of ERP construction in PEC...

本文以物探研究中心的信息化建设为出发点，以物探研究中心ERP建设为研究对象，在分析物探研究中心ERP建设现状和存在问题的基础上，借鉴国内外企业ERP建设的成功经验，提出了物探研究中心实施ERP的基本条件和必要条件，进一步提出了物探研究中心ERP建设的对策，包括目标、原则、步骤和策略。

The most important factor of the corporation development is the well-developed system and the perspicuity of the property rights. The sticking point to develop the corporate governance structure efficiency is the perspicuity of the property rights, and the outside circumstances are the necessary condition.

公司发展最重要的因素是制度的完善和产权的明晰，产权界定的清晰是改善公司治理结构性效率的关键，而社会环境和法律的不断的完善，是企业发展的外部因素，是公司治理适应性效率的提高和企业发展的必要条件。

Based on the conclusion of experimental law, the photoelectric threshold condition is obtained for the semi-insulating GaAs photoconductive switch under the non-linear mode, pointing it out that, when the optic-energy triggers off the switch to meet the prerequisite that n_0L is greater than or equal to 10~(12)cm~(-2), the necessary condition is achieved for high field domain and meanwhile the threshold electric field serves to produce charge transmission effect within the material.

在总结实验规律的基础上，得到半绝缘GaAs光电导开关非线性模式的光电阈值条件，指出当光能触发使开关满足n0L≥10~(12)cm~(-2)时，达到形成高场畴的必要条件，阈值电场的作用是使材料体内产生电子转移效应。

Physical fitness is not a requirement, but it could be helpful.

健康的体魄不是必要条件，但是确实有帮助的。

In Chapter 2, by using a class of piecewise continuous Lyapunov function and the method of analysis, we study existence, uniqueness and stability of impulsive Volterra intergro-differential equations.

在第二章中，主要利用分析技巧和分段Lyapunov函数等方法，讨论了含脉冲的Volterra积分微分方程解的存在性和其零解稳定性的充分或必要条件。

The X-ray diffract was used to analyze the crystal structure of the composite. Results show that after the talc was treated with blend coupling agent, the crystal structure of talc changed, and effect Intercalation phenomenon.

通过X射线衍射分析可知，用混合偶联剂对滑石粉进行预处理后，滑石粉晶体结构发生改变，产生了插层现象，使PP／滑石粉复合材料为纳米复合材料。

An authentic Maui wedding might require the services of a 'kahu', which is a Hawaiian minister.

毛伊可能需要一个真实婚礼服务'kahu'，这是夏威夷部长。