An Essential Proposal Exactly a year ago,Chinese President Xi Jinping put forward the Global Civilisation Initiative(GCl).In his speech addressing a dialogue between the Communist Party of China and other world politi...An Essential Proposal Exactly a year ago,Chinese President Xi Jinping put forward the Global Civilisation Initiative(GCl).In his speech addressing a dialogue between the Communist Party of China and other world political parties via video link in March 2023,Xi explained why he proposed the GCl:"As the future of all countries is closely connected,tolerance,coexistence,exchanges and mutual learning among different civilisations play an irreplaceable role in advancing humanity's modernisation process,and making the garden of world civilisation flourish."展开更多
In this paper, we consider the reconstruction of the wave field in a bounded domain. By choosing a special family of functions, the Cauchy problem can be transformed into a Fourier moment problem. This problem is ill-...In this paper, we consider the reconstruction of the wave field in a bounded domain. By choosing a special family of functions, the Cauchy problem can be transformed into a Fourier moment problem. This problem is ill-posed. We propose a regularization method for obtaining an approximate solution to the wave field on the unspecified boundary. We also give the convergence analysis and error estimate of the numerical algorithm. Finally, we present some numerical examples to show the effectiveness of this method.展开更多
Good afternoon!It's a great pleasure to share my views on Carthaginian civilisation with friends from both Tunisia and China.The Carthaginian civilisation is a compound of the Phoenician civilisation and ancient T...Good afternoon!It's a great pleasure to share my views on Carthaginian civilisation with friends from both Tunisia and China.The Carthaginian civilisation is a compound of the Phoenician civilisation and ancient Tunisian civilisation,and its interaction with the contemporaneous Roman civilisation gave birth to the splendid Mediterranean civilisation.展开更多
智能网联车辆队列行驶面临复杂的交通环境,所引发的时延、丢包等信息传输问题将导致队列车辆行驶稳定性降低而亟待解决.针对复杂交通环境,引入信息新鲜度(age of information, AoI)并提出了一种适应时变时延的智能网联车辆队列行驶稳定...智能网联车辆队列行驶面临复杂的交通环境,所引发的时延、丢包等信息传输问题将导致队列车辆行驶稳定性降低而亟待解决.针对复杂交通环境,引入信息新鲜度(age of information, AoI)并提出了一种适应时变时延的智能网联车辆队列行驶稳定性控制算法.该控制算法根据队列中多前车信息新鲜度来调整其对队列车辆车头间距影响的权重,同时依据时变时延信息预测队列中跟驰车辆与前车的车头间距,队列车辆按照请求周期向路侧单元(road side unit, RSU)实时发送请求,RSU依据车辆间距从小到大依次回应请求队列中的各个车辆,以控制其因时变时延可能造成的碰撞.数值仿真结果显示,相对智能驾驶员模型(intelligent driver model, IDM)而言,所提出的队列纵向稳定性控制算法具有更好的控制效果.针对时变时延发生概率20%的车车通信,队列车辆车头间距偏差的降低比例达6.4%,平均峰值信息新鲜度的降低比例达8.7%.同时,分析了队列车辆请求周期和回应请求车辆数量对队列纵向稳定性的影响,随着两者数值增加,控制算法给出的队列纵向稳定性分别呈现降低和增加的趋势.最后,实车测试了队列切出场景下车辆行驶数据和车辆接收信息的时延数据,将其引入数值仿真实验中.结果表明,车头间距偏差降低比例达15%.展开更多
现有方面级情感分析研究大多数往往从文本数据本身进行情感分析,而没有充分利用领域知识,忽略了语义依存信息的重要性,使得方面表示受噪声信息影响严重,出现噪声词注意权重高的可能。针对以上问题,结合领域知识,提出了一种剪枝算法和语...现有方面级情感分析研究大多数往往从文本数据本身进行情感分析,而没有充分利用领域知识,忽略了语义依存信息的重要性,使得方面表示受噪声信息影响严重,出现噪声词注意权重高的可能。针对以上问题,结合领域知识,提出了一种剪枝算法和语义-注意力机制相结合的方法(Pruning And Semantic At tention,PASA)针对服务领域特定方面进行情感分类。方法一方面结合领域知识对文本对应的语义依存树进行剪枝实现方面信息降噪,另一方面,通过利用语义-注意力机制进行增强并精确捕获方面的上下文描述信息,从而实现对方面情感极性的判断。为了验证所提出方法的正确性和有效性,在物流数据集、酒店评论数据集及SemEval 2014的Restaurant数据集进行了大量实验,结果表明,所提出的方法相对于其它方法具有明显优势,在垂直领域具有较好的应用前景。展开更多
Aimed at studying normali zed radial basis function network (NRBFN), this paper introduces the subtractiv e clustering based on a mountain function to construct the initial structure of NR BFN, adopts singular value ...Aimed at studying normali zed radial basis function network (NRBFN), this paper introduces the subtractiv e clustering based on a mountain function to construct the initial structure of NR BFN, adopts singular value decomposition (SVD) to analyze the relationship betwe en neural nodes of the hidden layer and singular values, cumulative contribution ratio, index vector, and optimizes the structure of NRBFN. Finally, simulation and performance comparison show that the algorithm is feasible and effective.展开更多
文摘An Essential Proposal Exactly a year ago,Chinese President Xi Jinping put forward the Global Civilisation Initiative(GCl).In his speech addressing a dialogue between the Communist Party of China and other world political parties via video link in March 2023,Xi explained why he proposed the GCl:"As the future of all countries is closely connected,tolerance,coexistence,exchanges and mutual learning among different civilisations play an irreplaceable role in advancing humanity's modernisation process,and making the garden of world civilisation flourish."
文摘In this paper, we consider the reconstruction of the wave field in a bounded domain. By choosing a special family of functions, the Cauchy problem can be transformed into a Fourier moment problem. This problem is ill-posed. We propose a regularization method for obtaining an approximate solution to the wave field on the unspecified boundary. We also give the convergence analysis and error estimate of the numerical algorithm. Finally, we present some numerical examples to show the effectiveness of this method.
文摘Good afternoon!It's a great pleasure to share my views on Carthaginian civilisation with friends from both Tunisia and China.The Carthaginian civilisation is a compound of the Phoenician civilisation and ancient Tunisian civilisation,and its interaction with the contemporaneous Roman civilisation gave birth to the splendid Mediterranean civilisation.
文摘智能网联车辆队列行驶面临复杂的交通环境,所引发的时延、丢包等信息传输问题将导致队列车辆行驶稳定性降低而亟待解决.针对复杂交通环境,引入信息新鲜度(age of information, AoI)并提出了一种适应时变时延的智能网联车辆队列行驶稳定性控制算法.该控制算法根据队列中多前车信息新鲜度来调整其对队列车辆车头间距影响的权重,同时依据时变时延信息预测队列中跟驰车辆与前车的车头间距,队列车辆按照请求周期向路侧单元(road side unit, RSU)实时发送请求,RSU依据车辆间距从小到大依次回应请求队列中的各个车辆,以控制其因时变时延可能造成的碰撞.数值仿真结果显示,相对智能驾驶员模型(intelligent driver model, IDM)而言,所提出的队列纵向稳定性控制算法具有更好的控制效果.针对时变时延发生概率20%的车车通信,队列车辆车头间距偏差的降低比例达6.4%,平均峰值信息新鲜度的降低比例达8.7%.同时,分析了队列车辆请求周期和回应请求车辆数量对队列纵向稳定性的影响,随着两者数值增加,控制算法给出的队列纵向稳定性分别呈现降低和增加的趋势.最后,实车测试了队列切出场景下车辆行驶数据和车辆接收信息的时延数据,将其引入数值仿真实验中.结果表明,车头间距偏差降低比例达15%.
文摘现有方面级情感分析研究大多数往往从文本数据本身进行情感分析,而没有充分利用领域知识,忽略了语义依存信息的重要性,使得方面表示受噪声信息影响严重,出现噪声词注意权重高的可能。针对以上问题,结合领域知识,提出了一种剪枝算法和语义-注意力机制相结合的方法(Pruning And Semantic At tention,PASA)针对服务领域特定方面进行情感分类。方法一方面结合领域知识对文本对应的语义依存树进行剪枝实现方面信息降噪,另一方面,通过利用语义-注意力机制进行增强并精确捕获方面的上下文描述信息,从而实现对方面情感极性的判断。为了验证所提出方法的正确性和有效性,在物流数据集、酒店评论数据集及SemEval 2014的Restaurant数据集进行了大量实验,结果表明,所提出的方法相对于其它方法具有明显优势,在垂直领域具有较好的应用前景。
文摘Aimed at studying normali zed radial basis function network (NRBFN), this paper introduces the subtractiv e clustering based on a mountain function to construct the initial structure of NR BFN, adopts singular value decomposition (SVD) to analyze the relationship betwe en neural nodes of the hidden layer and singular values, cumulative contribution ratio, index vector, and optimizes the structure of NRBFN. Finally, simulation and performance comparison show that the algorithm is feasible and effective.
