The standardization of mobile phone charger is proceeding steadily in Europe. This paper makes a quantitative analysis on the potential impact of this move in China. The demands for mobile handset and phone charger in...The standardization of mobile phone charger is proceeding steadily in Europe. This paper makes a quantitative analysis on the potential impact of this move in China. The demands for mobile handset and phone charger in China after the introduction of standardization are predicted based on Bass diffusion model. The results indicate that the standardization would have little influence on mobile phone producers, but may charger makers face a fierce turbulence. Standardization would not only reduce the size of charger market, but also change the stable demand to a fluctuating pattern. Standardization of mobile phone charger can contribute to green economy greatly and provide the ICT industry a directive signal for green innovation in the future. Finally, suggestions for policy makers are provided based on the analysis.展开更多
Based on electric vehicle technology and industrial development, this paper introduces the international and domestic situation of electric vehicle charging infrastructure standards, analyzes the problems existing in ...Based on electric vehicle technology and industrial development, this paper introduces the international and domestic situation of electric vehicle charging infrastructure standards, analyzes the problems existing in the standard system in China, and suggestions are put forward for the future direction and development of electric vehicle charging infrastructure standards.展开更多
In recent years,fast charging develops by leaps and bounds and growth rate is doubling.It is expected to be the biggest growth point in the market of consumer electronic accessories in the future.However,different fas...In recent years,fast charging develops by leaps and bounds and growth rate is doubling.It is expected to be the biggest growth point in the market of consumer electronic accessories in the future.However,different fast charging standards made by enterprises have troubled consumers.To this end,展开更多
建设完备的航天器电源与供配电标准体系是提升航天器电源与供配电系统设计正确、确保卫星能源安全可靠的重要工具。本文通过研究欧洲空间标准化合作组织ECSS(European Cooperation for Space Standardization)、美国宇航局NASA(National...建设完备的航天器电源与供配电标准体系是提升航天器电源与供配电系统设计正确、确保卫星能源安全可靠的重要工具。本文通过研究欧洲空间标准化合作组织ECSS(European Cooperation for Space Standardization)、美国宇航局NASA(National Aeronautics and Space Administration)、日本宇宙航空研究开发机构JAXA(Japan Aerospace Exploration Agency)、国际标准化组织ISO(International Standard Organization)和美国航空航天学会AIAA(American Institute of Aeronautics and Astronautics)等国外组织出版的电源与供配电系统标准,分析各自标准专业的侧重点,综述国外标准所包含的内容,总结各组织的标准体系,并结合我国的实际情况,提出了航天器电源与供配电标准体系建议和参考。展开更多
In this work, the possible structures of electron and proton have been explored. Based on the potential expressions of electron and proton, we found that the electron and proton share the similar structure inside re a...In this work, the possible structures of electron and proton have been explored. Based on the potential expressions of electron and proton, we found that the electron and proton share the similar structure inside re and rn. And within re and rn, the conventional charge concept stops working, the same charge repelling force doesn’t exist anymore and as a result, the requirement of charge conservation is automatically removed. Whereas beyond re and rn, the potential expressions of electron and proton obey the point charge potentials as we normally understand. Therefore, the conventional charge concept can be applied and the requirement of charge conservation takes effect. Furthermore, a possible mechanism for the creations of electric monopole and magnetic monopole is discussed. In addition, to compare the particle size in micro-world, the balloon criterion is proposed. By this balloon criterion, the proton is determined about 10 times bigger than electron. From the physical picture about electron and proton described above, the stabilities of electron and proton can be explained quite well.展开更多
基金supported by China Fundamental Research Funds for the Central Universities under Grant No.BUPT2009RC1008
文摘The standardization of mobile phone charger is proceeding steadily in Europe. This paper makes a quantitative analysis on the potential impact of this move in China. The demands for mobile handset and phone charger in China after the introduction of standardization are predicted based on Bass diffusion model. The results indicate that the standardization would have little influence on mobile phone producers, but may charger makers face a fierce turbulence. Standardization would not only reduce the size of charger market, but also change the stable demand to a fluctuating pattern. Standardization of mobile phone charger can contribute to green economy greatly and provide the ICT industry a directive signal for green innovation in the future. Finally, suggestions for policy makers are provided based on the analysis.
文摘Based on electric vehicle technology and industrial development, this paper introduces the international and domestic situation of electric vehicle charging infrastructure standards, analyzes the problems existing in the standard system in China, and suggestions are put forward for the future direction and development of electric vehicle charging infrastructure standards.
文摘In recent years,fast charging develops by leaps and bounds and growth rate is doubling.It is expected to be the biggest growth point in the market of consumer electronic accessories in the future.However,different fast charging standards made by enterprises have troubled consumers.To this end,
文摘建设完备的航天器电源与供配电标准体系是提升航天器电源与供配电系统设计正确、确保卫星能源安全可靠的重要工具。本文通过研究欧洲空间标准化合作组织ECSS(European Cooperation for Space Standardization)、美国宇航局NASA(National Aeronautics and Space Administration)、日本宇宙航空研究开发机构JAXA(Japan Aerospace Exploration Agency)、国际标准化组织ISO(International Standard Organization)和美国航空航天学会AIAA(American Institute of Aeronautics and Astronautics)等国外组织出版的电源与供配电系统标准,分析各自标准专业的侧重点,综述国外标准所包含的内容,总结各组织的标准体系,并结合我国的实际情况,提出了航天器电源与供配电标准体系建议和参考。
文摘In this work, the possible structures of electron and proton have been explored. Based on the potential expressions of electron and proton, we found that the electron and proton share the similar structure inside re and rn. And within re and rn, the conventional charge concept stops working, the same charge repelling force doesn’t exist anymore and as a result, the requirement of charge conservation is automatically removed. Whereas beyond re and rn, the potential expressions of electron and proton obey the point charge potentials as we normally understand. Therefore, the conventional charge concept can be applied and the requirement of charge conservation takes effect. Furthermore, a possible mechanism for the creations of electric monopole and magnetic monopole is discussed. In addition, to compare the particle size in micro-world, the balloon criterion is proposed. By this balloon criterion, the proton is determined about 10 times bigger than electron. From the physical picture about electron and proton described above, the stabilities of electron and proton can be explained quite well.
