环境与分析毒理学

A crucial task of a UAV cluster is quickly completing the exploration and construction of unknown environments. However, the formulation of a realtime detection map-based online autonomous exploration strategy remains a problem that requires discussion and improvement. The Distributed Next-Best-Path and Terminal (DNBPT) method is a distributed unknown environment exploration framework we propose in this paper for a UAV cluster that takes path and terminal state gain into complete account. In order to guide the UAV's subsequent decision, this method calculates the gain by comprehensively calculating the new exploration grid brought about by the exploration path and terminal state guidance to the unexplored area. We propose a reasonable multistep particular inspecting strategy and a better Discrete Parallel Molecule Multitude Enhancement calculation for way streamlining. The simulation shows that the DNBPT can explore multiple scenes quickly under high coverage conditions.

Ship recycling is a rapidly developing global industry that involves dismantling and scrapping ships when they are no longer usable. Every year 1000 old ships are recycled for scrap, with South Asia being the hub of this thriving ship breaking and recycling market. In Bangladesh, the industry began with the dismantling of stranded vessels and has since become a lucrative enterprise. The industry is an invaluable source of jobs and prosperity for many people living in poverty-stricken regions. Coastal zone management greatly suffers from the global shipping industry, particularly from environmental deterioration, legal obligations and labour issues.

Shockingly, India, Bangladesh & Pakistan are the frontrunners in this industry. Despite certain restrictions limitations, the ship recycling industry of Bangladesh has been significantly contributing to the country's Gross Domestic Product (GDP) and its overall socio-economic development. In recent times, however, its market share has been declining as a result of stringent environmental regulations. In comparison to its competitors, this reviewed article has put in substantial research effort to evaluate the state of global ship recycling and provide insights into the future of local ship recycling industry.