What are the necessary and sufficient conditions for the category BIRD?
什么是必要的和足够的条件，种类鸟？
Thus the necessary and sufficient conditions of weak controllability can be obtained.
对称性分析中，取得了状态转移局部对称性的充要条件。
The necessary and sufficient conditions for representing circular arc by rational parameter form are explained.
阐明了用有理参数形式表示圆弧的充要条件。
From the necessary and sufficient conditions of completely consistent matrix, criteria of consistency of professor t.
从完全一致性矩阵的充要条件出发，对t。
The exhaustive method can also be used to find the necessary and sufficient conditions for other over-constrained mechanisms.
文中的方法也可用于求其它过约束机构存在的充要条件。
In this paper, the necessary and sufficient conditions of controllability on a infinite dimensional semilinear system are given.
本文给出无穷维半线性系统能控的充分必要条件及其应用。
In this short paper the necessary and sufficient conditions for invariance of linear time-invariant systems are proved by a simple method.
本短文用简单方法证明了线性非时变系统不变性的充要条件。
We analyse three routing examples and describe the development of the necessary and sufficient conditions for wormhole deadlock free routing.
本文通过三个虫孔寻径无死锁的具体实例，深入阐述、分析了虫孔寻径无死锁充要条件的研究进展。
In the second we give the necessary and sufficient conditions for strict convexity of power function of exponential family in the discrete case.
在第二个问题中，我们给出了在离散的情形下，指数族势函数严凸的充分必要条件。
Neural networks for solving a class of variant variational inequalities are studied under the necessary and sufficient conditions of the solution.
基于解的充分必要条件，讨论了一类变量变分不等式的神经网络方法。
The necessary and sufficient conditions for recurrence, positive recurrence, exponential ergodicity and strong ergodicity of the process are presented.
本文给出了具有突变率的广义生-灭过程的常返性、正常返性、指数遍历性及强遍历性的充分必要条件。
Under the hypotheses of Bertrand competition, the necessary and sufficient conditions for the fully separating equilibrium of two-stage insurance are studied.
在伯川德竞争假设下，研究两期保险完全分离均衡存在的充要条件。
The compatibility of a class of nonlinear equality and inequality systems is discussed. The necessary and sufficient conditions of the compatibility are given.
讨论了一类非线性等式与不等式组的相容性，给出了其相容的充要条件。
This paper gives the necessary and sufficient conditions when the two GMW sequences have the same generator polynomials, and discussed the further conclusions.
给出了两个GMW序列具有相同生成多项式的充要条件。并讨论了进一步的结论。
The necessary and sufficient conditions are discussed on the existence of global solutions for quasilinear reaction-diffusion systems with nonlinear boundary conditions.
讨论一类带有非线性边界条件的拟线性反应扩散方程组，给出了解整体存在的充分必要条件。
The necessary and sufficient conditions of metapositive definite matrices are discussed and an inequality for the determinants of metapositive definiter matrices is given.
我们讨论了次正定矩阵的判别法，给出了次正定矩阵的行列式的一个不等式。
The necessary and sufficient conditions are given for the schedulability of real time connections at each network node under preemptive earliest due date scheduling policy.
在抢先最早预定日期调度策略下，给出了任意网络结点上实时连接调度能力的充分必要条件。
Besides, the author gives the necessary and sufficient conditions for the two generating subspaces to be orthogonal complement spaces in a unitary space and certain corollaries.
在此基础上，得到了酉空间中两个生成子空间互为正交补空间的充要条件及其若干推论。
This paper considers the extended quadratic programming problem. Based on the necessary and sufficient conditions for a saddle point, a neural network for solving it is proposed.
考虑了广义二次规划问题，基于其鞍点的充要条件，提出了求解它的一个神经网络。
Under the cases that the objective function is positive definite or positive semidefinite, the necessary and sufficient conditions to characterize global optimal solution are obtained.
假定约束是可行、规范的，对于目标函数为正定或半正定的情形，得到了全局最优解的充要条件。
When the output vector dimensions equal to the input vector dimensions, the necessary and sufficient conditions for decoupling and complete linearization to nonlinear system are given.
同时给出了输入输出维数相等时的解耦并完全线性化的充要条件。
In the present paper, We give the necessary and sufficient conditions for which the minimum variance linear unbiased estimator reduces to the least square in multivariate linear models.
本文讨论回归方程组系数的估计，给出最小二乘估计是有效估计的条件。
Furthermore, a fractional linear parametric segment is defined; the necessary and sufficient conditions for which the curve is such a segment are also obtained. All the above condition...
还给出了它是分式线性参数段的充分必要条件，这些条件都仅与权系数有关。
Equivalence between dissipativeness and positive realness is established, and the necessary and sufficient conditions are derived for discrete-time singular systems to be strict dissipative.
建立了耗散性与正实性之间的等价关系，由此得到离散广义系统严格耗散的充要条件。
The necessary and sufficient conditions for feedback linearization of this triangular system are more easily testified than the involutivity conditions for the feedback linearization theory.
这类三角形系统的反馈线性化的充分必要条件要比反馈线性化理论的对合条件易于检验。
Abstract: Under the matrix loss function, the necessary and sufficient conditions of linear admissible estimates of nonestimatible parameter functions for a general linear model are obtained.
文摘：一般线性模型可估函数的可容许估计问题已有详细的讨论。对一般线性模型在矩阵损失下，得到了不可估函数的线性估计为可容许估计的充要条件。
The purpose of this paper is to find the applying region of the t test, i. e. the necessary and sufficient conditions for a two dimension variable forms a test, which possesses at distribution.
本文的目的是研究t检验的适用范围，给出了二维随机向量构成服从t分布统计量的充要条件。
Subsequently, we character and study the 2-cocycles on a subalgebra of the algebra M3 (c) and obtain the necessary and sufficient conditions that a bilinear mapping is a 2-cocycle on this algebra.
接着对矩阵代数m_3 (C)的子代数上的2 -上循环进行了等价刻画，得到了其上的双线性映射是2 -上循环的充要条件。
The concept of grey system is extended to linear space. The necessary and sufficient conditions for a kind of grey problem to be transformed into a white one and the problems involved are proposed.
本文将灰色系统的概念引伸，定义了灰色数域、灰色线性空间，提出了一种灰色问题白化的充要条件及相应产生的问题。
It is an essential definition because it attempts to get at the essential features of the concept - its necessary and sufficient conditions of application.
它是一个本质定义，因为它试图抓住这个概念的本质特点——即使用这个概念的必要条件和充分条件。
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