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| 1 | Holocene vegetational and climatic variation in westerly-dominated areas of Central Asia inferred from the Sayram Lake in northern Xinjiang,China显示文摘Changes in the vegetation and climate of the westerly-dominated areas in Central Asia during the Holocene were interpreted using pollen-assemblages and charcoal data from a 300-cm-long sediment core of the Sayram Lake,northern Xinjiang.Accele-rator Mass Spectrometry(AMS) radiocarbon dating methods were applied to bulk organic matter of the samples.Artemisia spp./Chenopodiaceae ratios and results from principal component analysis were used to infer that the lake basin was dominated by desert vegetation before ca.9.6 cal.ka BP,which suggests a warm and dry climate in the early Holocene.Desert steppe/steppe expanded during 9.6-5.5 cal.ka BP,indicating a remarkable increase both in the precipitation and temperature during the mid-Holocene.Desert vegetation dominated between 6.5 and 5.5 cal.ka BP,marking an extreme warmer and drier interval.The steppe/meadow steppe recovered,and temperatures decreased from 5.5 cal.ka BP in the late Holocene,as indicated by the increased abundance of Artemisia and the development of meadows.Holocene temperatures and moisture variations in the Sayram Lake areas were similar to those of adjacent areas.This consistency implies that solar radiation was the main driving factor for regional temperature changes,and that the effect of temperature variations was significant on regional changes in humidity.The evolution of climate and environment in the Sayram Lake areas,which were characterized as dry in the early Holocene and relatively humid in the middle-late Holocene,are clearly different from those in monsoonal areas.Dry conditions in the early Holocene in the Sayram Lake areas were closely related to decreased water vapor advection.These conditions were a result of reduced westerly wind speeds and less evaporation upstream,which in turn were caused by seasonal changes in solar radiation superimposed by strong evaporation following warming and drying local climate. | JIANG QingFeng JI JunFeng SHEN Ji Ryo MATSUMOTO TONG GuoBang QIAN Peng REN XueMei YAN DeZhi | 2013 | Science China Earth Sciences2013，56，3： | 32 |
| 2 | Superior performance and high service stability for Ge Te-based thermoelectric compounds显示文摘GeTe-based compounds have been intensively studied recently due to their superior thermoelectric performance,but their real applications are still limited so far due to the drastic volume variation that occurs during the rhombohedral–cubic phase transition,which may break the material or the material/electrode interface during service.Here,superior performance and high service stability for GeTe-based thermoelectric compounds are achieved by co-doping Mg and Sb into GeTe.The linear coefficient of thermal expansion before phase transition is greatly improved to match that after phase transition,yielding smooth volume variation around the phase transition temperature.Likewise,co-doping(Mg,Sb)in GeTe successfully tunes the carrier concentration to the optimal range and effectively suppresses the lattice thermal conductivity.A peak z T of 1.84 at 800 K and an average z T of 1.2 in 300–800 K have been achieved in Ge0.85Mg0.05Sb0.1Te.Finally,a Ni/Ti/Ge0.85Mg0.05Sb0.1Te thermoelectric uni-leg is fabricated and tested,showing quite good service stability even after 450 thermal cycles between 473 K and 800 K.This study will accelerate the application of GeTe-based compounds for power generation in the mid-temperature range. | Tong Xing Qingfeng Song Pengfei Qiu Qihao Zhang Xugui Xia Jincheng Liao Ruiheng Liu Hui Huang Jiong Yang Shengqiang Bai Dudi Ren Xun Shi Lidong Chen | 2019 | National Science Review2019，6，5： | 4 |
| 3 | Resistance to ablation of pitch-derived ZrCjC composites显示文摘 | Tong Qingfeng Shi Jjingli Song Yongzhong | 2004 | Carbon2004，42，1213： | 1 |
| 4 | Down - regulation of surface fractalkine by RNA interference in B16 melonoma reduced tumor growth in mice 显示文摘 | Tong R Qingfeng C Zhigang T | 2007 | Biochemical and Biophysical Research Communications2007，364，4： | 1 |
| 5 | Resistance to ablation of pitch-derived ZrC/C composites显示文摘 | Tong Qingfeng Shi Jingli Song Yongzhong | 2004 | Carbon2004，42，1213： | 1 |
| 6 | Down - regulation of surface fractalkine by RNA interference in B16 melanoma reduced tumor growth in mice 显示文摘 | Tong Rcn Qingfeng Chen Zhigang Tian | 2007 | Bioche Biophy Res Co2007，364，12： | 1 |
| 7 | Resistance to ablation of pitch-derived ZrC/C composites显示文摘 | Jingli Shi Yongzhong Song | 2004 | Carbon2004，42，1213： | 1 |
| 8 | Low- temperature synthesis/densification and properties of Si2N2O prepared with LizO additive 显示文摘 | Tong Qingfeng Wang Jingyang Li Zhongping | 2007 | Journal of the European Ceramic Society2007，27，16： | 1 |
| 9 | Development of 12 MeV Electron Linear Accelerator for Nondestructive Testing显示文摘In recent years,the energy of electronic linear accelerator for nondestructive testing has a higher demand.In 2017,the Linear Accelerator Laboratory successfully won the bid of 2sets of12 MeV nondestructive testing electron linear accelerators from China First Heavy Industries.The main technical indicators are as follows:1)Equivalent steel testing thickness range,76- | YU Guolong TONG Xunhua WU Qingfeng HAN Guangwen ZENG Ziqiang BI Zhenliang HUO Jingsheng YU Guolong ZHAO Fuzhen | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 10 | Completing Site Acceptance of Electronic Linear Accelerator for Cargo Inspection显示文摘In March 2017,the 6 MeV electronic linear accelerator completed the factory commissioning with the detector to provide data support for onsite installation and debugging of accelerators and detectors.The synchronization pulse provided by the external trigger device causes the | YU Guolong TONG Xunhua HAN Guangwen WU Qingfeng ZENG Ziqiang BI Zhenliang YU Guolong ZHAO Fuzhen | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 11 | Development of 9 MeV Electron Linear Accelerator for ICT显示文摘According to a user Industrial Computed Tomography(ICT)upgrading needs,we developed a high stability,small focus,and explosionproof 9 MeV electron linear accelerator as a ray source of the CT system.Accelerator main technical requirements are as follows:1)X-ray energy,9 MeV;2)X-ray beam dose rate,≥3 000cGy/min(at | YU Guolong TONG Xunhua WU Qingfeng HAN Guangwen ZENG Ziqiang BI Zhenliang HUO Jingsheng ZHAO Fuzhen | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 12 | Development of the First Export NDT Electronic Linear Accelerator显示文摘In 2018,a non-destructive testing(NDT)linear was developed by the Linac Research Laboratory of Department of Nuclear Technology Application,which achieved a breakthrough in the export accelerator of China National Nuclear Corporation.1 Primary technical indicator This accelerator is used for non-destructive testing,and its technical indicators meet the international standards of the international standard IEC 62976—2017industrial nondestructive testing device-electronic linear accelerator,and the main indicators are as below: | YU Guolong TONG Xunhua HAN Guangwen WU Qingfeng XIANG Yihuai DOU Yuling ZENG Ziqiang | 2018 | 中国原子能科学研究院年报2018，，1： | 0 |
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