网络化作战信息流转策略适应性演化建模

动态灵活、优化匹配的信息流转策略,是网络化作战中信息顺畅传递、高效流转的重要保证。首先,定义了网络化作战信息流转的相关概念,抽象了信息流转策略结构;其次,给出了信息流转策略与使命任务的一致性匹配测度方法,分析了信息流转策略适应性演化的一般过程,提出了由演化收益和演化风险组成的适应性演化距离,以相邻信息流转策略之间的演化距离最小为优化目标,建立了网络化作战信息流转策略的适应性演化模型;然后,采用逐次优化算法搜索最优演化路径,并给出了相应的算法流程及求解步骤。最后,通过空中进攻作战案例分析,验证了模型与方法的可行性、有效性。

土地流转的策略选择与资源动用——基于对云南省W村的个案调查

基于个案调查,对云南省W村的土地流转进行研究,分析了当地土地流转的具体实践。研究认为土地流转双方的不同社会关系形成了情感型、经济型和权力型的土地流转策略,这些土地流转策略形成所动用的资源分别是情感资源、经济资源和权力资源,这些资源在土地流转过程中的动员能力也是有差异的。基于此,研究认为资源整合是有效促进土地流转的路径选择。

农村土地三权分置下土地经营权流转问题研究

农村土地经营权流转是促进我国农业经济转型发展的必要条件,引导和规范土地经营权的流转工作,对于维护农民利益,提高农业发展质量有重要价值。本文主要探讨土地经营权流转中存在的问题及对策。

A novel control strategy for load converter of DC isolated distribution system under unbalanced loading conditions

A novel control strategy for the load converter supplying the unbalanced AC load in a DC isolated distribution system is presented. The control algorithm results in balanced and sinusoidal load voltages under unbalanced AC loading. The unbalanced load is characterized in the d-q-0 rotating coordinate based on symmetrical sequence components. Also, the mathematical model of the load converter in both a-b-c and d-q-0 coordinates is derived by using the average large signal model. Then, two control strategies for the load converter are presented. The first one uses the conventional d-q-0 controller to ensure the voltage and current regulation. The second one is a newly proposed control strategy based on the decomposition of the voltage and current into in-stantaneous positive, negative, and zero sequences. These three sequences are controlled independently in their own reference frames as DC signals. The performance of the load converter using these two control strategies is compared. Simulation results show the validity and capability of the newly proposed control strategy.