In the realm of missile defense systems,the self-sufficient maneuver capacity of missile swarms is pivotal for their survival.Through the analysis of the missile dynamics model,a time-efficient cooperative attack stra...In the realm of missile defense systems,the self-sufficient maneuver capacity of missile swarms is pivotal for their survival.Through the analysis of the missile dynamics model,a time-efficient cooperative attack strategy for missile swarm is proposed.Based on the distribution of the attackers and defenders,the collision avoidance against the defenders is considered during the attack process.By analyzing the geometric relationship between the relative velocity vector and relative position vector of the attackers and defenders,the collision avoidance constrains of attacking swarm are redefined.The key point is on adjusting the relative velocity vectors to fall outside the collision cone.This work facilitates high-precision attack toward the target while keeping safe missing distance between other attackers during collision avoidance process.By leveraging an innovative repulsion artificial function,a time-efficient cooperative attack strategy for missile swarm is obtained.Through rigorous simulation,the effectiveness of this cooperative attack strategy is substantiated.Furthermore,by employing Monte Carlo simulation,the success rate of the cooperative attack strategy is assessesed and the optimal configuration for the missile swarm is deduced.展开更多
Agricultural cooperative economic organization for water-saving irrigation in arid areas is a new form of economic organization in production,operation and management during the application process of water-saving irr...Agricultural cooperative economic organization for water-saving irrigation in arid areas is a new form of economic organization in production,operation and management during the application process of water-saving irrigation technologies.Currently,there are few researches on this cooperative economic organization.In this study,connotations of cooperative economic organizations for water-saving irrigation are specifically defined,and the characteristics and functions of this cooperative economic organization are analyzed.Based on that,several suggestions are proposed on the continuous development of cooperative economic organizations for water-saving irrigation.展开更多
This paper focus on the function of cooperative learning in developing positive affect,Including reducing anxiety,increasing motivation,facilitating the development of positive attitudes toward learning and language l...This paper focus on the function of cooperative learning in developing positive affect,Including reducing anxiety,increasing motivation,facilitating the development of positive attitudes toward learning and language learning,promoting self-esteem,as well as supporting different learning styles and encouraging perseverance in the difficult and confusing process of learning a foreign language.展开更多
The nature of farmer cooperative economy organization( known as FCEO) determines the fact that the economic effects of farmer cooperative economy organization are as important as its social effects. Many experts,howev...The nature of farmer cooperative economy organization( known as FCEO) determines the fact that the economic effects of farmer cooperative economy organization are as important as its social effects. Many experts,however,now would only focus on its economic function, and either neglect or weaken its social influence. Therefore,this paper introduces the theoretical foundation of the farmer cooperative economy organization,and studies the nature of cooperative economics. Based on those typical cases,the future of cooperative organization and four supporting elements were put forward in this paper.展开更多
Amid the current evolving global political and economic landscape, the digital economy has achieved a positive momentum in BRICS countries. Emerging technologies ranging from big data, cloud computing, and the Interne...Amid the current evolving global political and economic landscape, the digital economy has achieved a positive momentum in BRICS countries. Emerging technologies ranging from big data, cloud computing, and the Internet of Things to artificial intelligence(AI) have maintained a dynamic development. New phenomena such as “new retail” and “new manufacturing” are persistently changing people's daily lives and gradually influencing human values and notions in social governance. BRICS countries have accelerated the innovation and development of the digital economy by constantly improving relevant cooperation mechanisms. “Digital BRICS” has already become an important force to promote world economic growth and enhance the reform of the global economic governance system. The development of the digital economy per se has unique characteristics. Thus, BRICS countries are faced with practical challenges in deepening cooperation. Particularly, they must reconsider the national security risks created by the transnational diffusion of technologies and the implications for the international order stemming from the excessive expansion of the power of digital giants. BRICS countries can continue to bridge differences and divergences among each other by strengthening functional cooperation in joint efforts to create greater room for shared digital benefits and open up a new future for the digital economy characterized by harmony, cooperation, and coexistence.展开更多
Objective: to observe the effect of multidisciplinary cooperative intervention on the recovery of bladder function after radical hysterectomy. Methods: 96 patients with extensive total hysterectomy received in our dep...Objective: to observe the effect of multidisciplinary cooperative intervention on the recovery of bladder function after radical hysterectomy. Methods: 96 patients with extensive total hysterectomy received in our department from July 2019 to December 2020 were taken as observation objects and divided into two groups. The first group used routine nursing intervention and the second group used multidisciplinary cooperation intervention on the basis of the first group. The nursing effect and bladder dysfunction score of the two groups were compared, with 48 patients in each group. Results: (1) the infection rate of urinary system in the first group was significantly higher than that in the second group. The indwelling time of urinary catheter in the second group was longer than that in the second group. There was a difference between the two groups (P < 0.05). (2) The score of bladder dysfunction before and one month after operation in the first group was higher than that in the second group, with difference between the two groups (P < 0.05). Conclusion: multidisciplinary cooperative intervention is effective for patients with extensive total hysterectomy and is recommended.展开更多
为提升矿工的风险感知水平,基于文献调研和试验研究,将噪声暴露分为0、15、30、45 min 4阶段,设计不同噪声暴露时间风险感知任务试验,采集被试的功能性近红外光谱(fNIRS)与行为数据,运用配对t检验、非参数检验、Pearson相关性分析方法,...为提升矿工的风险感知水平,基于文献调研和试验研究,将噪声暴露分为0、15、30、45 min 4阶段,设计不同噪声暴露时间风险感知任务试验,采集被试的功能性近红外光谱(fNIRS)与行为数据,运用配对t检验、非参数检验、Pearson相关性分析方法,探究不同噪声暴露时间对矿工风险感知水平的影响关系。结果表明:(1)被试的正确率受噪声暴露时间影响显著,随暴露时间的延长,正确率呈“先升后降”的趋势;(2)不同噪声暴露时间下进行风险感知任务显著激活位于眶额叶(OFC)、额极区(FPC)与背外侧前额叶(dlPFC)区域的通道,且左半脑激活程度略大于右半脑;(3)不同阶段脑区间呈现阶段性协作关系。无噪声阶段背外侧前额叶与额极区协作,噪声暴露时间为15 min时,额极区与眶额叶协作增强,暴露30与45 min,背外侧前额叶左右半球间协作增强。展开更多
现代战争中的空战态势复杂多变,因此探索一种快速有效的决策方法十分重要。本文对多架无人机协同对抗问题展开研究,提出一种基于长短期记忆(Long and short-term memory,LSTM)和多智能体深度确定策略梯度(Multi-agent deep deterministi...现代战争中的空战态势复杂多变,因此探索一种快速有效的决策方法十分重要。本文对多架无人机协同对抗问题展开研究,提出一种基于长短期记忆(Long and short-term memory,LSTM)和多智能体深度确定策略梯度(Multi-agent deep deterministic policy gradient,MADDPG)的多机协同超视距空战决策算法。首先,建立无人机运动模型、雷达探测区模型和导弹攻击区模型。然后,提出了多机协同超视距空战决策算法。设计了集中式训练LSTM-MADDPG分布式执行架构和协同空战系统的状态空间来处理多架无人机之间的同步决策问题;设计了学习率衰减机制来提升网络的收敛速度和稳定性;利用LSTM网络改进了网络结构,增强了网络对战术特征的提取能力;利用基于衰减因子的奖励函数机制加强无人机的协同对抗能力。仿真结果表明所提出的多机协同超视距空战决策算法使无人机具备了协同攻防的能力,同时算法具备良好的稳定性和收敛性。展开更多
基金supported by the Intelligent Aerospace System Leading Innovation Team Program of Zhejiang(2022R01003).
文摘In the realm of missile defense systems,the self-sufficient maneuver capacity of missile swarms is pivotal for their survival.Through the analysis of the missile dynamics model,a time-efficient cooperative attack strategy for missile swarm is proposed.Based on the distribution of the attackers and defenders,the collision avoidance against the defenders is considered during the attack process.By analyzing the geometric relationship between the relative velocity vector and relative position vector of the attackers and defenders,the collision avoidance constrains of attacking swarm are redefined.The key point is on adjusting the relative velocity vectors to fall outside the collision cone.This work facilitates high-precision attack toward the target while keeping safe missing distance between other attackers during collision avoidance process.By leveraging an innovative repulsion artificial function,a time-efficient cooperative attack strategy for missile swarm is obtained.Through rigorous simulation,the effectiveness of this cooperative attack strategy is substantiated.Furthermore,by employing Monte Carlo simulation,the success rate of the cooperative attack strategy is assessesed and the optimal configuration for the missile swarm is deduced.
基金Supported by National Science and Technology Support Program(2007BAD38B09)~~
文摘Agricultural cooperative economic organization for water-saving irrigation in arid areas is a new form of economic organization in production,operation and management during the application process of water-saving irrigation technologies.Currently,there are few researches on this cooperative economic organization.In this study,connotations of cooperative economic organizations for water-saving irrigation are specifically defined,and the characteristics and functions of this cooperative economic organization are analyzed.Based on that,several suggestions are proposed on the continuous development of cooperative economic organizations for water-saving irrigation.
文摘This paper focus on the function of cooperative learning in developing positive affect,Including reducing anxiety,increasing motivation,facilitating the development of positive attitudes toward learning and language learning,promoting self-esteem,as well as supporting different learning styles and encouraging perseverance in the difficult and confusing process of learning a foreign language.
基金Supported by the Youth Program of Chongqing Social Science Plan(No.2012QNGL047)West Program of Humanistic and Social Science of Education Department(No.13XJC630006)+1 种基金Education and Teaching Program of Southwest University(No.2012JY037)Chongqing Science Committee Decision-making Subject(No.2013KXKT07)
文摘The nature of farmer cooperative economy organization( known as FCEO) determines the fact that the economic effects of farmer cooperative economy organization are as important as its social effects. Many experts,however,now would only focus on its economic function, and either neglect or weaken its social influence. Therefore,this paper introduces the theoretical foundation of the farmer cooperative economy organization,and studies the nature of cooperative economics. Based on those typical cases,the future of cooperative organization and four supporting elements were put forward in this paper.
基金a special project supported by the National Social Science Fund of China for strategic research on the Belt and Road Initiative (BRI) titled “Report on Countries along the Belt and Road” (Grant No. 17VDL002)。
文摘Amid the current evolving global political and economic landscape, the digital economy has achieved a positive momentum in BRICS countries. Emerging technologies ranging from big data, cloud computing, and the Internet of Things to artificial intelligence(AI) have maintained a dynamic development. New phenomena such as “new retail” and “new manufacturing” are persistently changing people's daily lives and gradually influencing human values and notions in social governance. BRICS countries have accelerated the innovation and development of the digital economy by constantly improving relevant cooperation mechanisms. “Digital BRICS” has already become an important force to promote world economic growth and enhance the reform of the global economic governance system. The development of the digital economy per se has unique characteristics. Thus, BRICS countries are faced with practical challenges in deepening cooperation. Particularly, they must reconsider the national security risks created by the transnational diffusion of technologies and the implications for the international order stemming from the excessive expansion of the power of digital giants. BRICS countries can continue to bridge differences and divergences among each other by strengthening functional cooperation in joint efforts to create greater room for shared digital benefits and open up a new future for the digital economy characterized by harmony, cooperation, and coexistence.
文摘Objective: to observe the effect of multidisciplinary cooperative intervention on the recovery of bladder function after radical hysterectomy. Methods: 96 patients with extensive total hysterectomy received in our department from July 2019 to December 2020 were taken as observation objects and divided into two groups. The first group used routine nursing intervention and the second group used multidisciplinary cooperation intervention on the basis of the first group. The nursing effect and bladder dysfunction score of the two groups were compared, with 48 patients in each group. Results: (1) the infection rate of urinary system in the first group was significantly higher than that in the second group. The indwelling time of urinary catheter in the second group was longer than that in the second group. There was a difference between the two groups (P < 0.05). (2) The score of bladder dysfunction before and one month after operation in the first group was higher than that in the second group, with difference between the two groups (P < 0.05). Conclusion: multidisciplinary cooperative intervention is effective for patients with extensive total hysterectomy and is recommended.
文摘为提升矿工的风险感知水平,基于文献调研和试验研究,将噪声暴露分为0、15、30、45 min 4阶段,设计不同噪声暴露时间风险感知任务试验,采集被试的功能性近红外光谱(fNIRS)与行为数据,运用配对t检验、非参数检验、Pearson相关性分析方法,探究不同噪声暴露时间对矿工风险感知水平的影响关系。结果表明:(1)被试的正确率受噪声暴露时间影响显著,随暴露时间的延长,正确率呈“先升后降”的趋势;(2)不同噪声暴露时间下进行风险感知任务显著激活位于眶额叶(OFC)、额极区(FPC)与背外侧前额叶(dlPFC)区域的通道,且左半脑激活程度略大于右半脑;(3)不同阶段脑区间呈现阶段性协作关系。无噪声阶段背外侧前额叶与额极区协作,噪声暴露时间为15 min时,额极区与眶额叶协作增强,暴露30与45 min,背外侧前额叶左右半球间协作增强。
文摘现代战争中的空战态势复杂多变,因此探索一种快速有效的决策方法十分重要。本文对多架无人机协同对抗问题展开研究,提出一种基于长短期记忆(Long and short-term memory,LSTM)和多智能体深度确定策略梯度(Multi-agent deep deterministic policy gradient,MADDPG)的多机协同超视距空战决策算法。首先,建立无人机运动模型、雷达探测区模型和导弹攻击区模型。然后,提出了多机协同超视距空战决策算法。设计了集中式训练LSTM-MADDPG分布式执行架构和协同空战系统的状态空间来处理多架无人机之间的同步决策问题;设计了学习率衰减机制来提升网络的收敛速度和稳定性;利用LSTM网络改进了网络结构,增强了网络对战术特征的提取能力;利用基于衰减因子的奖励函数机制加强无人机的协同对抗能力。仿真结果表明所提出的多机协同超视距空战决策算法使无人机具备了协同攻防的能力,同时算法具备良好的稳定性和收敛性。
