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中文摘要：
针对异构传感网络节点在初始随机部署时产生覆盖盲区的问题，受简单随机抽样理论和最优化算法的启发，该文提出一种适用于感知半径异构的无线传感网覆盖优化算法。该算法以提高网络覆盖率和节点移动距离最小为优化目标，根据采样直线与平面感知圆的交点坐标之间的关系，建立了二次优化的数学模型。当平面中的多条采样直线段达到最优覆盖时，该文算法可以使平面的覆盖得到优化。实验证明，该算法能够有效提高异构网的覆盖率。
英文摘要：
For the problem of coverage blind area generated by randomly deploying the heterogeneous nodes in the initial stage, and inspired by simple random sampling in probability theory and optimization algorithm, a coverage optimization algorithm for heterogeneous sensing radius in Wireless Sensor Networks （WSNs） is proposed. To minimize the sensor nodes~ moving distance and improve the coverage rate, a quadratic programming mathematic model is established according to the relationship between coordinates of the intersections that between the sensing circles and the sampling line segments. Meanwhile~ the coverage of plane will be optimized when more line segments get optimizing coverage. Simulation results show that the algorithm improves the coverage rate of homogeneous networks effectively.
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