Based on Differential Evolution and Cuckoo Search, a hybrid optimization algorithm, called DDECS, is proposed in this paper for solving the ship pipe route layout optimization problem. The purpose of DDECS algorithm i...
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Based on Differential Evolution and Cuckoo Search, a hybrid optimization algorithm, called DDECS, is proposed in this paper for solving the ship pipe route layout optimization problem. The purpose of DDECS algorithm is to quickly and accurately optimize the ship pipe route under various kinds of constraints. Firstly, this paper pro-posed a vector coding method for ship pipe routes by studying the existing coding methods and ship pipe routes' attributes. The proposed vector coding method has a concise structure, strong compatibility and is independent of the gridding space. And then, the Discrete Hybrid Differential Evolution and Cuckoo Search (DDECS) algo-rithm was implemented by using the proposed vector coding. The DDECS algorithm has few parameters and high computational efficiency, and it can effectively find the global optimal solution by maintaining the diversity of the population. Finally, three comparative simulations were presented to validate the effectiveness and engi-neering practicality of DDECS algorithm. The results showed that, the proposed DDECS algorithm can get an optimization scheme with fewer elbows and more remaining areas, which is significant for the layout optimi-zation of the ship pipe route.
With the explosive growth of mobile data demand,the contradiction between rate demand and spectrum shortage has become increasingly ***-frequency communication systems such as millimeter wave and terahertz have gradua...
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With the explosive growth of mobile data demand,the contradiction between rate demand and spectrum shortage has become increasingly ***-frequency communication systems such as millimeter wave and terahertz have gradually entered people/s field of vision,and they have been applied to satellite communications because of their vast *** bottleneck of wireless bandwidth and spectrum utilization has become a vital issue for future wireless mobile networks,so terahertz communication has been proposed as an essential part of 5G and future 6G mobile *** article mainly investigates the enabling physical layer's critical technologies under the background of terahertz communication,including the recent research and development trend of the high-frequency band and multi-antenna technology and coding ***,this article points out the challenges and research directions of the terahertz communication network's physical layer technology in the future.
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