Elimination of not belonging to minimal covering of preserving quaternary regularly separable relations in partial four-valued logic Interactions between vegetation cover change and precipitation in Poyang Lake region P4~中保四元正则可离关系非最小覆盖的剔除鄱阳湖区域植被覆盖变化与降水相互响应关系
Meanwhile the method has its useful role to choose the minimal rock cover in the similar condition as the geological one of this sub-sea tunnel. 同时该方法对以后相似地质条件的海底隧道确定最小岩石覆盖厚度具有一定的参考意义。
They urged "a rapid shift, whenever and wherever conditions permit it, to management systems based on minimal soil disturbance, increased soil cover, and appropriate crop rotation". 他们敦促,“无论何时何地,只要条件许可,应迅速向以最低限度干扰土壤,增加土壤覆被和适当的作物轮作为基础的管理系统转变”。
Even minimal international co-ordination gives political cover to those governments that wish to press ahead with carbon reduction in the face of domestic opposition. 即使是最低限度的国际协作,也会让那些有意顶住国内反对、推进碳减排的政府得到政治掩护。
A Solution for Solving Minimal Cover of Functional Dependency Set Under Null Value Circumstances 空值环境下函数依赖集最小覆盖求法
By means of analysis of stress disturbed area, and comparing rock cover of weak regolith with stress disturbed area at axis and raising or decreasing, it is easy to determine minimal rock cover; 通过对应力扰动区的分析,以及隧道轴线位置、轴线升高或降低后各剖面应力扰动范围与弱风化层厚度的对比,很容易确定厦门海底隧道的最小顶板厚度;
If the minimal mesh size of stow nets is determined based on the result from the cover net method, the mesh size will tend to be bigger, resulting in excessive escape of the fish inside the codend. 在张网渔具最适网目试验中,如果直接使用套网法的试验结果制定最小网目,那么这一尺寸会偏大,造成部分鱼类过多释放。
It can not only automatically produce all minimal covers, but also give a detailed explanation of the minimal cover it has produced. 该系统不仅具有自动生成(任意)一个或全部极小覆盖、直接求得满足用户特殊要求的极小覆盖等功能,还可对自动生成的极小覆盖作出解释。
This paper presents algorithm of functional dependency set F of relation scheme R to compute the minimal cover of projection on an attribute set U of R, and also proves it correct. 给出了关系模式R的函数依赖集F在R的一个属性子集U上的投影的最小覆盖的算法,并证明了算法的正确性。
An Algorithm for Minimal Connected Cover Set Problem in Wireless Sensor Networks 无线传感器网络最小连通覆盖集问题求解算法
The method for obtaining "non-redundant" cover and the method which is called "orded array method" for finding "minimal" cover are also presented; 文中给出了无冗余覆盖及极小覆盖的求法,并称求极小覆盖的方法为序号数组法。
A Method Based on Supergraph for Minimal Cover 一种基于超图的最小覆盖集求法
The direct dependency graph ( DDG), direct dependency matrix ( DDM), dependency relation matrix ( DRM), degree of direct dependency ( DDD) and minimal cover ( MC) were defined. 然后定义了直接依赖图、直接依赖矩阵、直接依赖度、依赖关系矩阵和最小覆盖等概念。
Based on a study of reinforcement corrosion criterion and cracking criterion, a method for determining minimal concrete cover depth is presented in this paper. 通过混凝土中钢筋开始锈蚀条件的研究和混凝土保护层锈胀开裂条件的研究,建立了碳化腐蚀条件下混凝土最小保护层厚度的确定方法。
Research on choosing minimal rock cover and analysing stability of Xiamen subsea tunnel 厦门海底隧道顶板厚度选择及其开挖稳定性分析
Experimental results show that the algorithm can make an excellent and reasonable balance between coverage effect and active node number, and which obtains the minimal cover set is more adaptable for practical application need. 仿真表明,算法能在节点数量和覆盖度中做出合理权衡,得到更适应实际应用要求的最小覆盖集。
Aggregated Multicast can actually be attributed to minimal set cover problem, which is an NP-complete problem. 它的数学本质是最小集合覆盖问题,是一个NP-C问题。
The key of aggregated multicast is how to find trees with minimal number, enabling these trees to cover all the groups. 聚合组播问题的关键在于如何找到数目最小的组播树,使之覆盖所有的组播组。
This paper presents an optimized algorithm to seek the minimal cover set based on genetic algorithm. 论文设计了一种基于遗传算法的覆盖度优化算法。
It is shown that, for a given open factor map between minimal dynamical systems, the factor map is positively equicontinuous if and only if each open cover has a bounded relative complexity function. 我们证明了:对于极小动力系统间的开因子映射,它为正向等度连续扩充当且仅当每个开覆盖具有有界的相对复杂性函数。
The part fractal characteristic of short period traffic flow is analyzed using minimal cover dimension. The relationship between minimal cover dimension and short period traffic flow fluctuation is determined. 利用最小覆盖维方法分析了信号交叉口短时交通流的局部分形特性,确定了最小覆盖维数与短时交通流量波动的关系,提出了一种能估计短时交通流量发展和变化趋势的最小覆盖维方法。