The conductivity of polymer-derived SiOCN ceramics exhibited an Arrhenius dependence on pyrolysis temperature, with the activation energy of ~3.95 eV. The formation and structure change of the free carbon phase were d...The conductivity of polymer-derived SiOCN ceramics exhibited an Arrhenius dependence on pyrolysis temperature, with the activation energy of ~3.95 eV. The formation and structure change of the free carbon phase were detected by means of electron spin resonance spectroscopy and X-ray photoelectron spectroscopy. It reveals that the number of dangling bonds on the free carbon is increased as pyrolysis temperature increases, with the activation energy of ~3.87 eV. So it is demonstrated that the pyrolysis-temperature induced increase in the conductivity is mainly attributed to the increase of dangling on the graphite-like carbon.展开更多
In his remarks at the opening cerem ony of the 11th Ministerial Meeting of the Arctic Council,U.S.Secretary of State Mike Pompeo chided China for its participation in Arctic affairs,claiming that China is not an Arcti...In his remarks at the opening cerem ony of the 11th Ministerial Meeting of the Arctic Council,U.S.Secretary of State Mike Pompeo chided China for its participation in Arctic affairs,claiming that China is not an Arctic nation and has no claim to the region.In response,Geng Shuang,Chinese Ministry of Foreign Affairs spokesperson,said that censure from the U.S.is in conflict with the facts and goes against the historical trend of peaceful cooperation in the Arctic.Though geographically China does not have any territory in the Arctic region,it is a near-Arctic state.展开更多
On Oct. 15, 2010, the Annual National Planning Conference 2010 was launched in the People’s Great Hall of Chongqing and lasted for three days. Over 3,000 representatives attended the conference, including leaders fro...On Oct. 15, 2010, the Annual National Planning Conference 2010 was launched in the People’s Great Hall of Chongqing and lasted for three days. Over 3,000 representatives attended the conference, including leaders from planning and construction departments, planners from planning institutions and companies,展开更多
President Hu Jintao pointed out during his visit to Japan in 2008 that, in the final analysis, lasting friendship between China and Japan should begin with youth and children.
In Paris flowers are in full bloom in May and the weather is pleasant. The Heze Peony Cultural Festival was held in Yili Garden in Rambouillet on May 8.
From May 21 to 30,a training course for leading members of the Arab countries’ friendship-with-China organizations jointly sponsored by the CPAFFC and the China-Arab Friendship Association (CAFA) was held in Beijing....From May 21 to 30,a training course for leading members of the Arab countries’ friendship-with-China organizations jointly sponsored by the CPAFFC and the China-Arab Friendship Association (CAFA) was held in Beijing. This was the first training course ever held by the CPAFFC for leading members of a group of friendship-with-China organizations of foreign countries,and of the 22 Arab countries in particular. On May 21,展开更多
Invited by the Special Unit for South-South Cooperation (SU/ SSC) under the United Nations Development Program (UNDP), a 50-member delegation of mayors of small and medium-sized
文摘The conductivity of polymer-derived SiOCN ceramics exhibited an Arrhenius dependence on pyrolysis temperature, with the activation energy of ~3.95 eV. The formation and structure change of the free carbon phase were detected by means of electron spin resonance spectroscopy and X-ray photoelectron spectroscopy. It reveals that the number of dangling bonds on the free carbon is increased as pyrolysis temperature increases, with the activation energy of ~3.87 eV. So it is demonstrated that the pyrolysis-temperature induced increase in the conductivity is mainly attributed to the increase of dangling on the graphite-like carbon.
文摘In his remarks at the opening cerem ony of the 11th Ministerial Meeting of the Arctic Council,U.S.Secretary of State Mike Pompeo chided China for its participation in Arctic affairs,claiming that China is not an Arctic nation and has no claim to the region.In response,Geng Shuang,Chinese Ministry of Foreign Affairs spokesperson,said that censure from the U.S.is in conflict with the facts and goes against the historical trend of peaceful cooperation in the Arctic.Though geographically China does not have any territory in the Arctic region,it is a near-Arctic state.
文摘On Oct. 15, 2010, the Annual National Planning Conference 2010 was launched in the People’s Great Hall of Chongqing and lasted for three days. Over 3,000 representatives attended the conference, including leaders from planning and construction departments, planners from planning institutions and companies,
文摘President Hu Jintao pointed out during his visit to Japan in 2008 that, in the final analysis, lasting friendship between China and Japan should begin with youth and children.
文摘In Paris flowers are in full bloom in May and the weather is pleasant. The Heze Peony Cultural Festival was held in Yili Garden in Rambouillet on May 8.
文摘From May 21 to 30,a training course for leading members of the Arab countries’ friendship-with-China organizations jointly sponsored by the CPAFFC and the China-Arab Friendship Association (CAFA) was held in Beijing. This was the first training course ever held by the CPAFFC for leading members of a group of friendship-with-China organizations of foreign countries,and of the 22 Arab countries in particular. On May 21,
文摘Invited by the Special Unit for South-South Cooperation (SU/ SSC) under the United Nations Development Program (UNDP), a 50-member delegation of mayors of small and medium-sized
