| A Coverage-Preserving and Hole Tolerant Based Scheme for the Irregular Sensing Range in Wireless Sensor Networks Recent countries visiting this post |  |
 | 7 | United States |
 | 5 | |
 | 2 | China |
| A Coverage-Preserving and Hole Tolerant Based Scheme for the Irregular Sensing Range in Wireless Sensor Networks Recent countries visiting this post | |
| 7 | United States |
| 5 | |
| 2 | China |