必要条件

The presented security adequacy of unilateral authentication secure, mutual authentication secure, unilateral session key secure, or mutual session key secure is proved not only substantial but also necessary to meet 4 security definitions respectively under the computational model of matching conversation and indistinguishability.

在基于匹配对话和不可区分性的计算模型下，证明了给出的保证密码协议单方认证安全、双方认证安全、单方密钥安全和双方密钥安全的充分必要条件分别满足4个可证安全定义。

It's also the necessary condition to fit in with the developing trend of the individuation gradually tourist market.

建立有效的旅游安全保障体系，是促进我国旅游市场持续、稳定、健康发展的根本保障，也是适应日益个性化的旅游市场发展趋势的必要条件。

The sufficient and necessary condition for complete inertial force balancing of open-chain spatial linkages is derived and the concept of relative balancing is presented in this paper .

本文导出空间开链型机构惯性力完全平衡的充分必要条件，提出相对平衡的概念。

Ablish two decision theorems of relative compactness for unbounded function groups in an infinite interval.

sect；2.3我们建立了判定无穷区间上抽象无界连续函数组和抽象无界可微函数组相对紧性的充分必要条件，并对无穷区间上抽象二阶微分方程两点边值问题无界解的存在性做了研究。

But no matter the foreground of network sale how, no matter its are right human depend on have the feature that changes infirmly relatively, the communication with the personage inside course of study is the requirement that practitioner grows quickly.

但无论网络营销的前景如何，无论其对人际依靠有相对弱化的特征，与业内人士的交流都是从业者快速成长的必要条件。

Urban management is the prerequisite of a city'S existence and development,and law ution is the material instrument or approach in urban management.It is of great significance to building a harmonious society and inhabitable cities.

城市管理是城市存在和发展的必要条件，城管执法是城市管理的一种具体手段或者途径，对于建构和谐社会、建设宜居城市具有重要的作用和意义。

By use of prediction of adaptive model and instantaneous increment of current amplitude, fault pre-triggering and triggering mechanism for bus protection are realized in this paper, and sensitivity and reliability are improved consequently.

本文还利用自适应模型的预测和电流瞬时幅值的增量实现了母线保护的故障预启动和故障启动，灵敏故障预启动是实现抗TA饱和母线保护方法的基础，可靠故障启动是母线保护出口的必要条件。

This is a necessary condition for resolution of problem institutions.

这是解决"问题机构"的必要条件之一。

The growth of functions in these spaces depends on a weighted function ρ. We investigate the relation between growth and boundary values of the functions, and prove that a function or its radial derivative is in one of the spaces if and only if the p'integral average of the difference of its boundary value function is integrable or bounded.

研究这些函数空间中函数的增长性与边界值的关系，得到了函数或其径向导数属于相应空间的充分必要条件是其边界值差分的p次积分平均应具备一定的可积性或有界性。

In this paper we have obtained the sufficient and necessary condition concerning the passage to the limit under the integral sign, and have given some examples of the problems which can be solved by the theorem of this paper but cannot be solved by the familiar Vitali's theorem.

关于积分号下取极限的问题，有著名的Lebesgue定理及Vitali定理。本文作者进一步研究了这一问题，得到了积分号下取极限的充分和必要条件，并给出了几个能用本文结果解决而不能用Vitali定理解决的例子。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。