"Substitution"is a frequently mentioned word in rare earth industry in recent years.Substitution of rare earth materials by others materials or replacement of other technologies by rare earth application tec..."Substitution"is a frequently mentioned word in rare earth industry in recent years.Substitution of rare earth materials by others materials or replacement of other technologies by rare earth application technology is highly discussed.Substitution phenomena and corresponding effects will be analyzed in the article.1.Development of engineering technology is a history of technology innovation and advancement,as well as the substitution history of old technology,material or product with novel ones From the development history of civilization of human beings,the substitution had started more than展开更多
Shipbuilding industry is of great importance in the national manufacturing sector.Like the aircraft and automobile industries,it is also the systematic integration of materials,machinery,electric,light,and instruments...Shipbuilding industry is of great importance in the national manufacturing sector.Like the aircraft and automobile industries,it is also the systematic integration of materials,machinery,electric,light,and instruments manufacturing,combined with software and computer applications.Shipbuilding industry comprehensively reflects the technical and innovation ability of each subdivision of manufacturing industry.展开更多
Global warming caused by excessive carbon emissions has become a major challenge and an urgent problem that human must face and endeavor to resolve.Climate warming has brought various disasters to human beings and the...Global warming caused by excessive carbon emissions has become a major challenge and an urgent problem that human must face and endeavor to resolve.Climate warming has brought various disasters to human beings and the global environment.If global warming were to leave unchecked,the rising of sea level would lead some island countries disappear;ordinary hurricanes would bring serious disasters;large-scale forest fires would become more frequently and release more C0_(2);climate abnormalities would become high probability events to lead to the disappearance of some animals and plants;viruses and bacteria would more likely to breed.展开更多
1.Wind energy Wind is a kind of clean,pollution-free and renewable energy with great potential.Wind power generation refers to the use of wind turbines to convert wind energy into electricity directly.Among the variou...1.Wind energy Wind is a kind of clean,pollution-free and renewable energy with great potential.Wind power generation refers to the use of wind turbines to convert wind energy into electricity directly.Among the various forms of wind energy utilization,wind power generation is the main form of wind energy utilization,and it is also one of the most mature technologies,the most profitable prospects of renewable energy.展开更多
文摘"Substitution"is a frequently mentioned word in rare earth industry in recent years.Substitution of rare earth materials by others materials or replacement of other technologies by rare earth application technology is highly discussed.Substitution phenomena and corresponding effects will be analyzed in the article.1.Development of engineering technology is a history of technology innovation and advancement,as well as the substitution history of old technology,material or product with novel ones From the development history of civilization of human beings,the substitution had started more than
文摘Shipbuilding industry is of great importance in the national manufacturing sector.Like the aircraft and automobile industries,it is also the systematic integration of materials,machinery,electric,light,and instruments manufacturing,combined with software and computer applications.Shipbuilding industry comprehensively reflects the technical and innovation ability of each subdivision of manufacturing industry.
文摘Global warming caused by excessive carbon emissions has become a major challenge and an urgent problem that human must face and endeavor to resolve.Climate warming has brought various disasters to human beings and the global environment.If global warming were to leave unchecked,the rising of sea level would lead some island countries disappear;ordinary hurricanes would bring serious disasters;large-scale forest fires would become more frequently and release more C0_(2);climate abnormalities would become high probability events to lead to the disappearance of some animals and plants;viruses and bacteria would more likely to breed.
文摘1.Wind energy Wind is a kind of clean,pollution-free and renewable energy with great potential.Wind power generation refers to the use of wind turbines to convert wind energy into electricity directly.Among the various forms of wind energy utilization,wind power generation is the main form of wind energy utilization,and it is also one of the most mature technologies,the most profitable prospects of renewable energy.
