A novel broad concept of numbers was given out based upon the analyzing of numbers′ carrying rule. In international mathematics & computer science, all researches on numbers are only confined to same varying rule...A novel broad concept of numbers was given out based upon the analyzing of numbers′ carrying rule. In international mathematics & computer science, all researches on numbers are only confined to same varying rule of the FCN (fixed carrying numbers). The concept of VCN (variable carrying numbers) was presented, and some applied examples of practice were given out. So the engineering application of VCN for n-figures is wider than that of FCN in human society.展开更多
VN and VCN coatings were prepared using multi-arc ion plating technique on 316L stainless steel and single silicon sub-strates.Microstructures,mechanical performances,corrosion behaviors and tribology properties of VN...VN and VCN coatings were prepared using multi-arc ion plating technique on 316L stainless steel and single silicon sub-strates.Microstructures,mechanical performances,corrosion behaviors and tribology properties of VN and VCN coatings in the atmosphere,distilled water and seawater were contrastively tested.It was confirmed that the VCN coating had a typi-cal nanocystallite/amorphous structure.Moreover,the hardness increased from 30.5 to 36.5 GPa and the corrosion current density decreased from 2.16×10^(−6) to 0.82×10^(−6)A cm^(−2) after carbon was doped into the VN coating.Compared with the VN coating,the VCN coating had the lowest friction coefficient of 0.26 and wear rate of 0.68×10^(−6)mm^(3)Nm^(−1) in seawater,which could be ascribed to the lubrication of graphitization transfer film and improvement of the comprehensive performance.展开更多
1997年世界超声会议(WCU)于8月24～27日在日本横浜市召开。与会代表有来自日本、法国、德国、英国、美国、意大利等20个国家的近千名代表。会议讲演专题有:超声基础,超声换能器与材料,光声学和声光,超声测量,物理声学,超声器件,功率超声...1997年世界超声会议(WCU)于8月24～27日在日本横浜市召开。与会代表有来自日本、法国、德国、英国、美国、意大利等20个国家的近千名代表。会议讲演专题有:超声基础,超声换能器与材料,光声学和声光,超声测量,物理声学,超声器件,功率超声,超声马达,无损检测,声化学,医用超声,水下声学等。会议邀请了(德国)Gerhard-Mercator University的Joachim Herbert教授就"Safety of Medical Ultrasound"(日)东北大学的Kazuhiko Yamanouchi教授就"Future Trend of Acoustic wave Device",(美国)Yale University的Robert Apfel教授就"Super Oscillations of Drops and Surfactant Studies in Microgravity"作了特邀报告。会议期间设有超声设备/仪器展览。以下就物理声学、无损检测、水下声学专题略作介绍。展开更多
基金This research is supported by the Nature Science Foundation of Fujian Province of China(item No.2006J0414foundation No.A0640015)
文摘A novel broad concept of numbers was given out based upon the analyzing of numbers′ carrying rule. In international mathematics & computer science, all researches on numbers are only confined to same varying rule of the FCN (fixed carrying numbers). The concept of VCN (variable carrying numbers) was presented, and some applied examples of practice were given out. So the engineering application of VCN for n-figures is wider than that of FCN in human society.
基金the Program of Qingjiang Excellent Young Talents,Jiangxi University of Science and Technology,Natural Science Foundation of Jiangxi Province(Grant 20181BBE58001)Natural Science Foundation of Jiangxi Education Department(Grant GJJ180431).
文摘VN and VCN coatings were prepared using multi-arc ion plating technique on 316L stainless steel and single silicon sub-strates.Microstructures,mechanical performances,corrosion behaviors and tribology properties of VN and VCN coatings in the atmosphere,distilled water and seawater were contrastively tested.It was confirmed that the VCN coating had a typi-cal nanocystallite/amorphous structure.Moreover,the hardness increased from 30.5 to 36.5 GPa and the corrosion current density decreased from 2.16×10^(−6) to 0.82×10^(−6)A cm^(−2) after carbon was doped into the VN coating.Compared with the VN coating,the VCN coating had the lowest friction coefficient of 0.26 and wear rate of 0.68×10^(−6)mm^(3)Nm^(−1) in seawater,which could be ascribed to the lubrication of graphitization transfer film and improvement of the comprehensive performance.
文摘1997年世界超声会议(WCU)于8月24～27日在日本横浜市召开。与会代表有来自日本、法国、德国、英国、美国、意大利等20个国家的近千名代表。会议讲演专题有:超声基础,超声换能器与材料,光声学和声光,超声测量,物理声学,超声器件,功率超声,超声马达,无损检测,声化学,医用超声,水下声学等。会议邀请了(德国)Gerhard-Mercator University的Joachim Herbert教授就"Safety of Medical Ultrasound"(日)东北大学的Kazuhiko Yamanouchi教授就"Future Trend of Acoustic wave Device",(美国)Yale University的Robert Apfel教授就"Super Oscillations of Drops and Surfactant Studies in Microgravity"作了特邀报告。会议期间设有超声设备/仪器展览。以下就物理声学、无损检测、水下声学专题略作介绍。
