To calibrate the phase retardance of a Liquid crystal variable retarder(LCVR),its birefringence dispersion characteristic was analyzed,and the Support vector machines(SVM) algorithm was adopted to establish the predic...To calibrate the phase retardance of a Liquid crystal variable retarder(LCVR),its birefringence dispersion characteristic was analyzed,and the Support vector machines(SVM) algorithm was adopted to establish the prediction model.The obtained SVM decision function was used as a part of LCVR phase retardance,which was generated by the driving voltage.The experimental verification was carried out with a 568 nm laser.The results show that the deviation of the experimental value and the theoretical value is about 0.0061λ.SVM method could be used as an effective method for LCVR phase retardance characteristic calibration.展开更多
HISTORY regards the Western colonial system of the 19th and 20th centuries, represented by the former British Empire. as the first rudimentary step in the path of globalization. Then came the U.S.-led multinationaliza...HISTORY regards the Western colonial system of the 19th and 20th centuries, represented by the former British Empire. as the first rudimentary step in the path of globalization. Then came the U.S.-led multinationalization process featuring transnational corporations＇ business expansion globally, regarded as ＂Globalization 1.0＂ But today, with the world standing at a crossroads rocked by waves of anti-globalization, even Britain and the United States, the standard bearers and beneficiaries of the first phases of globalization, are grow ing voices advocating parochialism.展开更多
Fine art and big finance are proving a profitable combination in China but questions of authenticity need to be addressed CHINA’S art market is on fire.As sales and prices break records,a new force has appeared in th...Fine art and big finance are proving a profitable combination in China but questions of authenticity need to be addressed CHINA’S art market is on fire.As sales and prices break records,a new force has appeared in the market - organized art finance in the form of art trust funds and artwork exchanges.展开更多
KIMENG Hilton Ndukong, a journalist from the Cameroon Tribune. envisions a future where more African countries will further align with other developing nations through investment and shared practices.
The revamped National Museum of China opens its doors and shows off a priceless collection of historical artifacts AFTER four years of renovation work and an expansion to its floor space, the National Museum of China ...The revamped National Museum of China opens its doors and shows off a priceless collection of historical artifacts AFTER four years of renovation work and an expansion to its floor space, the National Museum of China (NMC) reopened on March展开更多
AS the Tibetan Plateau is considered the globe＇s Third Pole, changes in its environment are closely linked to the environment and ecosystem of the world, Eurasia in particular.
Washington’s military moves in Asia arouse speculation Shortly after the Shangri-La Dialogue and U.S.Defense Secretary Leon Panetta’s visits to Asia-Pacific countries,the 2012 Rim of the Pacific (RIMPAC2012) multina...Washington’s military moves in Asia arouse speculation Shortly after the Shangri-La Dialogue and U.S.Defense Secretary Leon Panetta’s visits to Asia-Pacific countries,the 2012 Rim of the Pacific (RIMPAC2012) multinational naval exercise,the largest in history,will be staged at the end of June in the Pacific near Hawaii.The large scale展开更多
China attempts to build consensus on the Syrian crisis Despite being a veto-wielding permanent member of the UN Security Council,China has used its privileges paringly.Over the past four decades,it has cast only eight...China attempts to build consensus on the Syrian crisis Despite being a veto-wielding permanent member of the UN Security Council,China has used its privileges paringly.Over the past four decades,it has cast only eight vetoes,fewer than any other permanent member of the Security Council.展开更多
基金supported by the National Natural Science Foundation of China ( grant no. 91338116)the National Key Basic Research and Development Program ( 973 Plan) ( grant no. 613225)
文摘To calibrate the phase retardance of a Liquid crystal variable retarder(LCVR),its birefringence dispersion characteristic was analyzed,and the Support vector machines(SVM) algorithm was adopted to establish the prediction model.The obtained SVM decision function was used as a part of LCVR phase retardance,which was generated by the driving voltage.The experimental verification was carried out with a 568 nm laser.The results show that the deviation of the experimental value and the theoretical value is about 0.0061λ.SVM method could be used as an effective method for LCVR phase retardance characteristic calibration.
文摘HISTORY regards the Western colonial system of the 19th and 20th centuries, represented by the former British Empire. as the first rudimentary step in the path of globalization. Then came the U.S.-led multinationalization process featuring transnational corporations＇ business expansion globally, regarded as ＂Globalization 1.0＂ But today, with the world standing at a crossroads rocked by waves of anti-globalization, even Britain and the United States, the standard bearers and beneficiaries of the first phases of globalization, are grow ing voices advocating parochialism.
文摘Fine art and big finance are proving a profitable combination in China but questions of authenticity need to be addressed CHINA’S art market is on fire.As sales and prices break records,a new force has appeared in the market - organized art finance in the form of art trust funds and artwork exchanges.
文摘KIMENG Hilton Ndukong, a journalist from the Cameroon Tribune. envisions a future where more African countries will further align with other developing nations through investment and shared practices.
文摘The revamped National Museum of China opens its doors and shows off a priceless collection of historical artifacts AFTER four years of renovation work and an expansion to its floor space, the National Museum of China (NMC) reopened on March
文摘AS the Tibetan Plateau is considered the globe＇s Third Pole, changes in its environment are closely linked to the environment and ecosystem of the world, Eurasia in particular.
文摘Washington’s military moves in Asia arouse speculation Shortly after the Shangri-La Dialogue and U.S.Defense Secretary Leon Panetta’s visits to Asia-Pacific countries,the 2012 Rim of the Pacific (RIMPAC2012) multinational naval exercise,the largest in history,will be staged at the end of June in the Pacific near Hawaii.The large scale
文摘China attempts to build consensus on the Syrian crisis Despite being a veto-wielding permanent member of the UN Security Council,China has used its privileges paringly.Over the past four decades,it has cast only eight vetoes,fewer than any other permanent member of the Security Council.
