January 2018 marks the 20th anniver sary of China South Africa diplomatic relations. The 20 years have wimessed rapid growth of bilateral ties of the two countries in all aspects through interactions reader the framew...January 2018 marks the 20th anniver sary of China South Africa diplomatic relations. The 20 years have wimessed rapid growth of bilateral ties of the two countries in all aspects through interactions reader the frameworks such as the Forum on China-Africa Cooperation （FOCAC）. BRICS （Brazil. Russia, India. China and South Africa） cooperation plafform and the Belt and Road Initiative. But how can the two countries further integrate their cooperation under these frameworks and what is the out look for China South Africa relations in the coming decades？展开更多
Since the examination paper generated with computer by the algorithms of random and backtracking takes on inferior quality and inefficient, and the question of generating examination paper with computer has the charac...Since the examination paper generated with computer by the algorithms of random and backtracking takes on inferior quality and inefficient, and the question of generating examination paper with computer has the character of multi-ob-jective because of the index system metrics, the genetic algorithm with multi-objective strategy optimization is proposed to solve this problem. Mapping the index system to multi-objective functions and optimizing the computing with multi-objective strategy are employed in the algorithm. The genetic algorithm experiment based on the multi-objective strategy optimization shows that the result has the advantages getting tradeoff between performance and quality, and having the ability to tune the performance and quality to meet the user’s requirements.展开更多
A soliton is a packet of self-reinforcing waves that maintains its structure when moving at a constant speed.Solitons are caused by the cancellation of the medium’s nonlinear and dispersive effects.In plas-mas,the bi...A soliton is a packet of self-reinforcing waves that maintains its structure when moving at a constant speed.Solitons are caused by the cancellation of the medium’s nonlinear and dispersive effects.In plas-mas,the bilinear form of Hirota will be utilized to investigate the(2+1)-dimensional Korteweg-de Vries equation with electrostatic wave potential.Solutions for complexiton lump interaction have been devel-oped.To throw further light on the physical qualities of the recorded data,certain 3-dimensional and contour plots are presented to illustrate the interaction elements of these solutions.展开更多
文摘January 2018 marks the 20th anniver sary of China South Africa diplomatic relations. The 20 years have wimessed rapid growth of bilateral ties of the two countries in all aspects through interactions reader the frameworks such as the Forum on China-Africa Cooperation （FOCAC）. BRICS （Brazil. Russia, India. China and South Africa） cooperation plafform and the Belt and Road Initiative. But how can the two countries further integrate their cooperation under these frameworks and what is the out look for China South Africa relations in the coming decades？
文摘Since the examination paper generated with computer by the algorithms of random and backtracking takes on inferior quality and inefficient, and the question of generating examination paper with computer has the character of multi-ob-jective because of the index system metrics, the genetic algorithm with multi-objective strategy optimization is proposed to solve this problem. Mapping the index system to multi-objective functions and optimizing the computing with multi-objective strategy are employed in the algorithm. The genetic algorithm experiment based on the multi-objective strategy optimization shows that the result has the advantages getting tradeoff between performance and quality, and having the ability to tune the performance and quality to meet the user’s requirements.
文摘A soliton is a packet of self-reinforcing waves that maintains its structure when moving at a constant speed.Solitons are caused by the cancellation of the medium’s nonlinear and dispersive effects.In plas-mas,the bilinear form of Hirota will be utilized to investigate the(2+1)-dimensional Korteweg-de Vries equation with electrostatic wave potential.Solutions for complexiton lump interaction have been devel-oped.To throw further light on the physical qualities of the recorded data,certain 3-dimensional and contour plots are presented to illustrate the interaction elements of these solutions.
