中文说明： 提出一种基于非测距式的PSO改进DV-Hop算法，该改进算法在提高定位精度的同时且不需要节点具备测距能力,无需额外硬件、能耗低、受环境影响较小,算法简单,易于实现,对于各向同性的密集网络,可以得到合理的平均每跳距离,定位精度等方面能满足应用要求
English Description：
&In this paper, an improved DV hop algorithm based on non ranging PSO is proposed. The improved algorithm not only improves the positioning accuracy, but also does not require the node to have ranging capability, no additional hardware, low energy consumption and less environmental impact. The algorithm is simple and easy to implement. For isotropic dense network, a reasonable average hop distance can be obtained, The positioning accuracy can meet the application requirements