针对浣熊优化算法(coati optimization algorithm,COA)全局搜索能力不足、易陷入局部最优和收敛速度慢的问题,提出一种基于非线性自适应的改进浣熊优化算法(improved coati optimization algorithm based on nonlinear adaptation,NACOA...针对浣熊优化算法(coati optimization algorithm,COA)全局搜索能力不足、易陷入局部最优和收敛速度慢的问题,提出一种基于非线性自适应的改进浣熊优化算法(improved coati optimization algorithm based on nonlinear adaptation,NACOA)。采用Logistic-Tent映射初始化浣熊种群,提升算法初始搜索空间覆盖度,生成更加分散且高质量的初始解;引入莱维飞行策略,利用其长跳跃特性,增强算法的全局搜索能力,有效避免算法陷入局部最优;利用非线性递减惯性权重提高种群的适应性与搜索效率,平衡全局搜索和局部搜索能力,并通过黄金正弦策略提高种群收敛精度。在基准测试函数上进行对比仿真试验,结果表明NACOA具有更好的收敛速度和寻优精度。将NACOA应用到工程问题设计中,证明了该算法的有效性和实用性。展开更多
DUE to the novel coronavirus outbreak,China has announced the postponement of this year’s“Two Sessions,”the major annual political meetings generally scheduled for March.The“Two Sessions”is the popular name for t...DUE to the novel coronavirus outbreak,China has announced the postponement of this year’s“Two Sessions,”the major annual political meetings generally scheduled for March.The“Two Sessions”is the popular name for the meetings of China’s main political bodies—the National People’s Congress and the Chinese People’s Political Consultative Conference.展开更多
RECENTLY,the novel coronavirus(COVID-19)epidemic continues to spread and wreak havoc in many countries,causing great concern worldwide,and leading to many countries and regions declaring a state of emergency.It first ...RECENTLY,the novel coronavirus(COVID-19)epidemic continues to spread and wreak havoc in many countries,causing great concern worldwide,and leading to many countries and regions declaring a state of emergency.It first broke out in the city of Wuhan and has since raged across China.Where is the source of this disease?Scientists are still exploring,but that the virus is the common enemy of mankind,a security threat facing all humanity,is a general consensus.The World Health Organization(WHO),after declaring the outbreak“a public health emergency of international concern”at the end of January this year,upgraded the global risk several times to“very high,”its top level of risk assessment.Facing the threat of the virus,China did its utmost to take effective and transparent measures to contain the virus.Meanwhile,China actively strengthened international cooperation to prevent the epidemic from spreading to other countries in the world,and has been striving to build an epidemic-resistant world community,so that people can gain confidence in winning the war against the pandemic.展开更多
GLOBALIZATION can only be achieved through joint efforts of all humanity.The pandemic is but another facet of the level of globalization that has cropped up as an inevitability and reality of the current situation tod...GLOBALIZATION can only be achieved through joint efforts of all humanity.The pandemic is but another facet of the level of globalization that has cropped up as an inevitability and reality of the current situation today.Instead of spurning globalization,humanity should instead spur it further,and see deliberation on it as beneficial for humanity.展开更多
文摘针对浣熊优化算法(coati optimization algorithm,COA)全局搜索能力不足、易陷入局部最优和收敛速度慢的问题,提出一种基于非线性自适应的改进浣熊优化算法(improved coati optimization algorithm based on nonlinear adaptation,NACOA)。采用Logistic-Tent映射初始化浣熊种群,提升算法初始搜索空间覆盖度,生成更加分散且高质量的初始解;引入莱维飞行策略,利用其长跳跃特性,增强算法的全局搜索能力,有效避免算法陷入局部最优;利用非线性递减惯性权重提高种群的适应性与搜索效率,平衡全局搜索和局部搜索能力,并通过黄金正弦策略提高种群收敛精度。在基准测试函数上进行对比仿真试验,结果表明NACOA具有更好的收敛速度和寻优精度。将NACOA应用到工程问题设计中,证明了该算法的有效性和实用性。
文摘DUE to the novel coronavirus outbreak,China has announced the postponement of this year’s“Two Sessions,”the major annual political meetings generally scheduled for March.The“Two Sessions”is the popular name for the meetings of China’s main political bodies—the National People’s Congress and the Chinese People’s Political Consultative Conference.
文摘RECENTLY,the novel coronavirus(COVID-19)epidemic continues to spread and wreak havoc in many countries,causing great concern worldwide,and leading to many countries and regions declaring a state of emergency.It first broke out in the city of Wuhan and has since raged across China.Where is the source of this disease?Scientists are still exploring,but that the virus is the common enemy of mankind,a security threat facing all humanity,is a general consensus.The World Health Organization(WHO),after declaring the outbreak“a public health emergency of international concern”at the end of January this year,upgraded the global risk several times to“very high,”its top level of risk assessment.Facing the threat of the virus,China did its utmost to take effective and transparent measures to contain the virus.Meanwhile,China actively strengthened international cooperation to prevent the epidemic from spreading to other countries in the world,and has been striving to build an epidemic-resistant world community,so that people can gain confidence in winning the war against the pandemic.
文摘GLOBALIZATION can only be achieved through joint efforts of all humanity.The pandemic is but another facet of the level of globalization that has cropped up as an inevitability and reality of the current situation today.Instead of spurning globalization,humanity should instead spur it further,and see deliberation on it as beneficial for humanity.
