The major applications of electrical steel(ES) sheets are motors,transformers,etc.In recent years, the raise of crude oil price and increasing environmental consciousness trigger the demands for saving energy and redu...The major applications of electrical steel(ES) sheets are motors,transformers,etc.In recent years, the raise of crude oil price and increasing environmental consciousness trigger the demands for saving energy and reducing CO_2 emissions,which greatly accelerate the development of high quality ES sheets.To meet the quality requirements of high efficiency motors and transformers,high grade ES sheets with high flux density are continuously developed and introduced to the market.Meanwhile,the price competition and quality improvement of general grades are important for the lower end application.The iron loss of 50CS1300(50A1300) is significantly reduced by controlling some key parameters.Other than the normal grade,the highest grades of nonoriented (NO) ES are successfully developed recently.And all specifications of 0.50 and 0.35 mm among JIS C 2552 specification could be provided by CSC.As to the insulation coating development,the Cr-free insulation coating has been introduced to the market due to the environmental concern,and has been enormously adopted in Taiwan market.Furthermore,the thicker insulation coating technology has been successfully developed for specific wind power generator application.The newly developed products and quality improvements of electrical steel sheets in China Steel are introduced in this paper.展开更多
Based on days of high temperature and extremely highest temperature data in Nanxiong City during 1981-2017,combining the Provisions on the Issuance of Early Warning Signals for Sudden Meteorological Disasters in Guang...Based on days of high temperature and extremely highest temperature data in Nanxiong City during 1981-2017,combining the Provisions on the Issuance of Early Warning Signals for Sudden Meteorological Disasters in Guangdong Province,days of high temperature,extreme temperature,characteristic of high temperature warning level in Nanxiong City in past 37 years were analyzed. The results showed that annual average days of high temperature in Nanxiong City was 31. 1 d,and annual average extremely highest temperature was 38. 0 ℃,while annual extremely highest temperature was 40. 4 ℃. High temperature occurred during May-September,and its main occurrence period was from July to August,accounting for 78%. Yellow high temperature weather was the most,followed by orange high temperature weather,and red high temperature weather was the least. High temperature warning concentrated during May-September,and orange and red warning mainly occurred in July-August. In the 21^(st) century,high temperature warning at serious grade accounted for more than 70% of total disaster times.展开更多
Let F be an algebraically closed field and charF=0. In this note, using the method ofmixed product in ref. [1], the irreducible positive （negative） Z-graded module of Liesuperalgebra H（n） with base space V （top s...Let F be an algebraically closed field and charF=0. In this note, using the method ofmixed product in ref. [1], the irreducible positive （negative） Z-graded module of Liesuperalgebra H（n） with base space V （top space V） is determined, where the highest weightof H（n）<sub>0</sub>-module V is not kλ<sub>1</sub> for any nonnegative integer k.展开更多
文摘The major applications of electrical steel(ES) sheets are motors,transformers,etc.In recent years, the raise of crude oil price and increasing environmental consciousness trigger the demands for saving energy and reducing CO_2 emissions,which greatly accelerate the development of high quality ES sheets.To meet the quality requirements of high efficiency motors and transformers,high grade ES sheets with high flux density are continuously developed and introduced to the market.Meanwhile,the price competition and quality improvement of general grades are important for the lower end application.The iron loss of 50CS1300(50A1300) is significantly reduced by controlling some key parameters.Other than the normal grade,the highest grades of nonoriented (NO) ES are successfully developed recently.And all specifications of 0.50 and 0.35 mm among JIS C 2552 specification could be provided by CSC.As to the insulation coating development,the Cr-free insulation coating has been introduced to the market due to the environmental concern,and has been enormously adopted in Taiwan market.Furthermore,the thicker insulation coating technology has been successfully developed for specific wind power generator application.The newly developed products and quality improvements of electrical steel sheets in China Steel are introduced in this paper.
文摘Based on days of high temperature and extremely highest temperature data in Nanxiong City during 1981-2017,combining the Provisions on the Issuance of Early Warning Signals for Sudden Meteorological Disasters in Guangdong Province,days of high temperature,extreme temperature,characteristic of high temperature warning level in Nanxiong City in past 37 years were analyzed. The results showed that annual average days of high temperature in Nanxiong City was 31. 1 d,and annual average extremely highest temperature was 38. 0 ℃,while annual extremely highest temperature was 40. 4 ℃. High temperature occurred during May-September,and its main occurrence period was from July to August,accounting for 78%. Yellow high temperature weather was the most,followed by orange high temperature weather,and red high temperature weather was the least. High temperature warning concentrated during May-September,and orange and red warning mainly occurred in July-August. In the 21^(st) century,high temperature warning at serious grade accounted for more than 70% of total disaster times.
基金Project supported by the National Natural Science Foundation of China.
文摘Let F be an algebraically closed field and charF=0. In this note, using the method ofmixed product in ref. [1], the irreducible positive （negative） Z-graded module of Liesuperalgebra H（n） with base space V （top space V） is determined, where the highest weightof H（n）<sub>0</sub>-module V is not kλ<sub>1</sub> for any nonnegative integer k.
