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| 1 | Recent temperature increase recorded in an ice core in the source region of Yangtze River显示文摘Interests on climate change in the source region of Yangtze River have been raised since it is a region with the greatest warming over the Tibetan Plateau (TP). A 70-year history of precipitation δ^(18)O has been recovered using an ice core record retrieved in a plat portion of the firn area in the Guoqu Glacier (33°34′37.8″N, 91°10′35.3″E, 5720 m a.s.l.), Mt. Geladaindong (the source region of Yangtze River), in November, 2005. By using a significant positive relationship between ice core δ^(18)O record and summer air temperature (July to September) from the nearby meteorological stations, a history of summer air temperature has been reconstructed for the last 70 years. Summer temperature was relatively low in 1940s and high in 1950s to the middle of 1960s. The lowest temperature occurred in the middle of 1970s. Temperature was low in 1980s and dramatically increased since 1990s, keeping the trend to the begin-ning of the 21st century. The warming rate recorded in the ice core with 0.5℃/10 a since 1970s is much higher that that in the central TP and the Northern Hemisphere (NH), and it becomes 1.1℃/10 a since 1990s which is also higher than these from the central TP and the NH, reflecting an accelerated warm-ing and a more sensitive response to global warming in the high elevation region. | KANG ShiChang ZHANG YongJun QIN DaHe REN JiaWen ZHANG QiangGong Bjorn GRIGHOLM Paul A. MAYEWSKI | 2007 | Chinese Science Bulletin2007，52，6： | 27 |
| 2 | Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material显示文摘Optical vortices,a type of structured beam with helical phase wavefronts and‘doughnut’-shaped intensity distributions,have been used to fabricate chiral structures in metals and spiral patterns in anisotropic polarization-dependent azobenzene polymers.However,in isotropic polymers,the fabricated microstructures are typically confined to non-chiral cylindrical geometry due to the two-dimensional‘doughnut’-shaped intensity profile of the optical vortices.Here we develop a powerful strategy to realize chiral microstructures in isotropic material by coaxial interference of a vortex beam and a plane wave,which produces threedimensional(3D)spiral optical fields.These coaxial interference beams are generated by designing contrivable holograms consisting of an azimuthal phase and an equiphase loaded on a liquid-crystal spatial light modulator.In isotropic polymers,3D chiral microstructures are achieved under illumination using coaxial interference femtosecond laser beams with their chirality controlled by the topological charge.Our further investigation reveals that the spiral lobes and chirality are caused by interfering patterns and helical phase wavefronts,respectively.This technique is simple,stable and easy to perform,and it offers broad applications in optical tweezers,optical communications and fast metamaterial fabrication. | Jincheng Ni Chaowei Wang Chenchu Zhang Yanlei Hu Liang Yang Zhaoxin Lao Bing Xu Jiawen Li Dong Wu Jiaru Chu | 2017 | Light(Science & Applications)2017，6，1： | 28 |
| 3 | Carbon footprint of different industrial spaces based on energy consumption in China显示文摘用精力消费和在 2007 的中国的每个区域的陆地使用数据,这份报纸基于精力消费建立了碳排放和碳脚印模型,并且在 2007 估计了石块精力的碳排放数量和中国的不同区域的农村生物资源精力。通过与工业空格匹配精力消费项目,这份报纸把工业空格划分了成五种类型:农业空间,生活与工业广告的空间,交通工业空间,渔业和水管理空间,和另外的工业空间。然后,作者分析了碳排放紧张和各工业的空间的碳脚印。最后,减少的工业碳脚印的忠告和优化工业空间模式被提出。主要结论如下:(1 ) 从在 2007 的中国的精力消费的碳排放的全部的数量是大约 1.65 GtC,从石块精力的碳排放的比例在是 89% 。(2 ) 在 2007 的中国的工业空间的碳排放紧张是 1.98 t/hm2,在哪个,生活的碳排放紧张与工业广告的空间并且交通,工业空间分别地是 55.16 t/hm2 和 49.65 t/hm2,他们是 high-carbon-emission 在其它之中的工业空格。(3 ) 碳脚印由工业活动引起了在 2007 的中国是 522.34 吗? | ZHAO Rongqin HUANG Xianjin ZHONG Taiyang PENG Jiawen | 2011 | Journal of Geographical Sciences2011，21，2： | 26 |
| 4 | Spatial econometric analysis of carbon emissions from energy consumption in China显示文摘作为技术支持从 1997~2009 并且用 ArcGIS9.3 和 GeoDA9.5 在中国基于每个区域的精力消费数据,这篇论文用精力消费在碳排出物的地区性的水平在空间模式的变化趋势上做了初步的研究,碳排出物的空间自相关分析,在碳排出物和他们的影响因素之间的空间回归分析。分析结果如下被显示出。(1 ) 从精力消费的碳排出物从 1997 ~ 2009 增加了超过 148% 但是高、低的排放区域的空间模式没极大地变化。( 2 )从精力消费的碳排出物的全球空间自相关从 1997~2009 增加了,空间自相关分析证明那在那里存在极化现象,高高度的凝块的中心没极大地变化,但是当前膨胀,低低的凝块的中心也没极大地变化,但是当前变窄。(3 ) 空间回归分析显示出那碳从精力消费的排出物与 GDP 和人口有一种靠近的关系,在碳排出物和 GDP 之间的空间回归的摆平 R 的率在碳排出物和人口之间比那高。到碳排出物的人口的贡献增加了,但是 GDP 的贡献从 1997 ~ 2009 减少了。碳排出物溢出效果由于两个从 1997 ~ 2009 被加重 GDP 和人口的增加, GDP 和人口因此是加强了碳排出物的空间自相关的二个主要因素。 | CHUAI Xiaowei HUANG Xianjin WANG Wanjing WEN Jiqun CHEN Qiang PENG Jiawen | 2012 | Journal of Geographical Sciences2012，22，4： | 26 |
| 5 | Preliminary evidence indicating Dome A (Antarctica) satisfying preconditions for drilling the oldest ice core显示文摘Lowest temperature and snow accumulation rate are preconditions for retrieving the oldest ice core from the polar ice sheets. The 10-m depth firn temperature at Dome A, the summit of the Antarctic Ice Sheet, recorded by an automatic weather station (AWS) was -58.3℃ in 2005 and -58.2℃ in 2006, re-spectively. The 10-m firn temperature is an approximation of the annual mean air temperature (AMAT), and this is the lowest AMAT that has been recorded on the surface of the Earth. The stable isotopic ratios (δ 18O and δ D) of surface snow at Dome A are also lower than at other ice sheet domes along the East Antarctic Ice Divide such as Dome C, Dome F, Dome B and Vostok. These facts indicate that Dome A is the 'pole of cold' on the Earth. The total amount of snow accumulation rate in 2005 and 2006 was only 0.16 cm, equaling 0.016 m water equivalent per year, the lowest precipitation ever recorded from Antarctica. Preliminary evidences indicate that Dome A is a candidate site for recovering the oldest ice core. | XIAO CunDe LI YuanSheng HOU ShuGui lan ALLISON BIAN LinGen REN JiaWen | 2008 | Chinese Science Bulletin2008，53，1： | 23 |
| 6 | Federated Learning for 6G Communications:Challenges,Methods,and Future Directions显示文摘As the 5G communication networks are being widely deployed worldwide,both industry and academia have started to move beyond 5G and explore 6G communications.It is generally believed that 6G will be established on ubiquitous Artificial Intelligence(AI)to achieve data-driven Machine Learning(ML)solutions in heterogeneous and massive-scale networks.However,traditional ML techniques require centralized data collection and processing by a central server,which is becoming a bottleneck of large-scale implementation in daily life due to significantly increasing privacy concerns.Federated learning,as an emerging distributed AI approach with privacy preservation nature,is particularly attractive for various wireless applications,especially being treated as one of the vital solutions to achieve ubiquitous AI in 6G.In this article,we first introduce the integration of 6G and federated learning and provide potential federated learning applications for 6G.We then describe key technical challenges,the corresponding federated learning methods,and open problems for future research on federated learning in the context of 6G communications. | Yi Liu Xingliang Yuan Zehui Xiong Jiawen Kang Xiaofei Wang Dusit Niyato | 2020 | China Communications2020，17，9： | 21 |
| 7 | Recent accumulation rate at Dome A,Antarctica显示文摘Based on the horizon of β activity and the density profiles, recent accumulation rate at Dome A, Ant-arctica is calculated to be 0.023 m water equivalent per year. This value is comparative to the accumu-lation rates deduced from the other inland sites of Antarctica. Clear-sky precipitation (or diamond dust) dominates the total precipitation at Dome A region. We speculate Dome A as a potential site to discover the oldest ice in Antarctica due to its tremendous ice thickness (>3000 m), extremely low accumulation rate, and low ice velocity. | HOU ShuGui LI YuanSheng XIAO CunDe REN JiaWen | 2007 | Chinese Science Bulletin2007，52，3： | 21 |
| 8 | Extension of the Louzidian Metamorphic Core Complex and Development of Supradetachment Basins in Southern Chifeng,Inner Mongolia,China显示文摘The Louzidian metamorphic core complex (LMCC) in southern Chifeng is located on the northern margin of the North China craton. Structural analyses of the LMCC and its extensional detachment system indicate that the LMCC experienced two-stage extension. The ductile regime experienced top-to-northeast shearing extension and the brittle detachment fault underwent top-down-outwards slipping. Between these two stages, a semi-ductile regime recorded the transition from ductile to brittle. The hanging wall of the detachment fault is similar to those classic supradetachment basins in western North America. Analyses of provenance and paleocurrent directions in the basins show that there were two filling stages. In the early stage, materials came from the southwest margin of the basin and the hanging wall of the detachment system and were transported from southwest to northeast; while in the late stage, deposits were derived from the footwall of the detachment fault and transported outwards to the two sides of the core complex. Since the filling period of the basins is from the late Jurassic to the late Cretaceous and it is coeval with the extension, the two filling stages reflect the two-stage history of the detachment fault. The large-scale late Jurassic underplating in the deep crust of the Chifeng area led to thickening and heating of the middle-upper crust and trigged the extension at depths and volcanism on the surface. In the early Cretaceous the upper plate of the detachment fault moved northeastwards and sediments were transported from southwest to northeast, while in the late Cretaceous the core complex was uplifted rapidly, the original basin was separated by the uplifted core, and lower-plate-derived debris was deposited in the adjacent upper-plate basins of the detachment fault. Evidentially, the development of the supradetachment basins were controlled by the extension and in turn the fillings in the basins recorded information of the extension, which has provided new evidence for kinematic interpretation of the Louzidian core complex. | WANGXinshe ZHENGYadong JIAWen | 2004 | Acta Geologica Sinica(English Edition)2004，78，1： | 19 |
| 9 | Effect of pitch angle on initial stage of a transport airplane ditching显示文摘Airworthiness regulations require that the transport airplane should be proved to ensure the survivability of the ditching for the passengers. The planned ditching of a transport airplane on the calm water is numerically simulated. The effect of pitch angle on the impact characteristics is especially investigated by a subscaled model. The Reynolds-averaged Navier-Stokes (RANS) equations of unsteady compressible flow are solved and the realizable j-e equations are employed to model the turbulence. The transformation of the air-water interface is tracked by volume of fluid (VOF) model. The motion of the rigid body is modeled by dynamic mesh method. The initial ditching stage of the transport airplane is analyzed in detail. The numerical results show that as the pitching angle increases, the maximal normal force decreases and the pitching motion becomes much gentler. The aft fuselage would be sucked down by the water and lead to pitching up, whereas the low horizontal tail prevents this trend. Consequently, the transport aircraft with low horizontal tail should ditch on the water at an angle between 10 and 12 as a recommendation. | Guo Baodong Liu Peiqing Qu Qiulin Wang Jiawen | 2013 | Chinese Journal of Aeronautics2013，26，1： | 18 |
| 10 | Optimization Transmission Theory and Technical Pathways that Describe Multiscale Urban Agglomeration Spaces显示文摘Urban agglomerations are spatial entities that promote the development of ‘new urbanization' processes within China. In this context, the concept of ‘multiscale urban agglomeration spaces' encompasses three linked levels: macroscale urban agglomerations, mesoscale cities, and microscale urban centers. Applying a series of multidisciplinary integrated research methods drawn from geography, urban planning, and architecture, this paper reveals two intensive utilization laws that can be generalized to apply to multiscale urban agglomeration spaces, top-to-bottom ‘positive transmission' linkage and inside-to-outside ‘negative transmission' movement. This paper also proposes optimization transmission theory and policy decision technical pathways that can be applied to these three urban agglomeration spatial scales. Specific technical pathways of transmission include intensive expansion and simulated decision-making in macroscale urban agglomerations, ecology, production, and living space intensive layout and dynamic decision-making in mesoscale cities, and four cores(i.e., ‘single, ring, axis, and pole core') progressive linkage and intensive optimization decision-making in microscale urban centers. The theory and technical pathways proposed in this paper solve the technical problem of optimization and provide intensive methods that can be applied not only at the individual level but also at multiple scales in urban agglomeration spaces. This study also advances a series of comprehensive technical solutions that can be applied to both compact and smart growth cities as well as to urban agglomerations. Solid theoretical support is provided for the optimization of Chinese land development, urbanization, agricultural development, and ecological security. | FANG Chuanglin YANG Junyan FANG Jiawen HUANG Xiejun ZHOU Yi | 2018 | Chinese Geographical Science2018，28，4： | 14 |
| 11 | Foliar δ^(13)C and δ^(15)N values of C_3 plants in the Ethiopia Rift Valley and their environmental controls显示文摘The foliar C and N stable isotopic compositions(δ 13C and δ 15N) and the relationships between these compositions and environmental factors of C3 plants in the Ethiopia Rift Valley were investigated. There were three distribution patterns for foliar δ 13C with mean values of ?26.7‰±0.4‰,?29.7‰± 0.6‰,and ?26.9‰± 1.2‰ in cold-moist,temperate-moist,and arid-hot environments,respectively. The δ 15N values ranged from ?1.4‰± 1.7‰ to 14.3‰± 0.1‰,with higher values under arid-hot conditions and the lowest values in plants growing at higher altitudes under cold-moist conditions. A strong negative relationship between mean annual precipitation and δ 15N explained more than half of the observed variation in the δ 15N values(r2 = 0.54,P < 0.001);a modest positive relationship was also found between δ 15N and tem-perature(r2 = 0.32,P < 0.01). A weakly positive relationship existed between δ 13C and temperature,and changes in δ 13C values with precipitation and altitude followed quadratic curves. This suggests a shift in the effects of water and heat conditions caused by altitude on carbon isotopic discrimination. | LIU XiaoHong ZHAO LiangJu GASAW Menassie GAO DengYi QIN DaHe REN JiaWen | 2007 | Chinese Science Bulletin2007，52，9： | 12 |
| 12 | Mechanomics: an emerging field between biology and biomechanics显示文摘在 vivo 各种各样的房间感觉机械刺激,它开始到机械力量的下游的发信号。当证据的身体在过去的十年在有限机械管理者的影响上被介绍时,机制 biomechanical 回答怎么全球性影响房间函数需要被探讨。复杂性和差异在 vivo,机械线索介绍不同模式砍有它的大小,持续时间,或频率的各种各样的参量的联合的流动,张力的段,或机械压缩。因此,理解被要求,从 mechanobiology 的观点,房间的机械特征是什么,机械性质为什么,并且怎么在不同房间类型之中是不同的力量是到下游地生物化学的信号的 transduced。同时,那些通常在 vivo 一起在孤立的机械刺激是的 vitro 联合了,建议是的不同因素能个别地实际上被抵销或与对方一起安排了。显然, omics 分析,系统生物学的地里的一个强大的工具,是有益的与 mechanobiology 结合然后印射它的染色体编码的机械地敏感的蛋白质和抄本完整集合。这块新出现地,也就是 mechanomics,使阐明可能在系统地变化的机械刺激下面的全球回答。这评论在 mechanomics 的相关的地里讨论当前的进展并且详细描述房间怎么察觉到外部力量并且激活生物回答。 | Jiawen Wang Dongyuan Lu Debin Mao Mian Long | 2014 | Protein & Cell2014，5，7： | 12 |
| 13 | Measuring the spatiotemporal variation and evolution of transport network of China's megaregions显示文摘 | SONG Ge YANG Jiawen | 2016 | Journal of Geographical Sciences2016，26，10： | 12 |
| 14 | First mass measurement of short-lived nuclides at HIRFL-CSR显示文摘Recent commissioning of the HIRFL-CSR has demonstrated its ability to perform direct mass measurement for short-lived nuclides. Projectile fragments produced by the 78Kr ions at 481.88 MeV/u were separated with the new radioactive beam line in Lanzhou (RIBLL2), and injected into and stored in the experimental storage ring (CSRe). By operating the CSRe as an isochronous mass spectrometry, a typical mass resolution around 2.0×10?5 has been achieved. The masses for 63Ge, 65As and 67Se were measured for the first time. The measured masses are compared with theoretical predictions and the location of the proton drip-line for As isotopes is discussed. The implication of the 65As mass in the astrophysical rapid proton capture process has also been addressed. | XU HuShan TU XiaoLin YUAN YouJin XIA JiaWen ZANG YongDong WANG Meng MAO RuiShi HU ZhengGuo MEI Bo SHUAI Peng ZHU ZhiChao TANG ShuWen GENG Peng LIU Yong ZHAO TieCheng ZHANG XueYing YANG JianCheng MAO LiJun ZHANG YuHu ZHOU XiaoHong HUANG WenXue XIAO GuoQing ZHAO HongWei ZHAN WenLong | 2009 | Chinese Science Bulletin2009，54，24： | 11 |
| 15 | The summer monsoon evolution recorded by carbon isotope of organic matter from the Yuanbao loess section during the Last Interglaciation显示文摘Based on the carbon isotope record of organic matter from the Yuanbao loess section, northwestern China, five enhanced summer monsoon events were observed at this area during the Last Interglaciation. Such events were also recorded by the paleosol layers, pollen assemblage and magnetic susceptibility. It is suggested that the enhanced summer monsoon leads to the shift of vegetation type, which results in the change of δ13C value of organic matter in the paleosol layer. It appears that the δ13C of organic matter is a good indicator for the summer monsoon variation. Among these five events, the first, second and the fifth reached their maximum smoothly, but the other two had experienced a less cold stage before reaching their peaks, which suggests that the mechanisms of such events may be different. | Yong He Dahe Qin Jiawen Ren Fengxia Li | 2002 | Chinese Science Bulletin2002，47，15： | 10 |
| 16 | New focuses of polar ice-core study: NEEM and Dome A显示文摘Ice core records from polar regions are of great value to study long-term climate and environmental change. Greenland ice-core records are celebrated for their high resolution and have provided very important knowledge for understanding the late Quaternary palaeoclimate, especially in reference to millennial-scale abrupt climatic flips during the last glaciation. Recently, a new project to retrieve a deep ice-core from Greenland known as NEEM for North Greenland Eemian Ice Drilling, has been launched with the main target being the last interglacial period. The new core will help us understand further details of climate changes during a period of warmth as the present. Antarctic ice cores have a unique advantage in providing recovery of longer time-scale paleclimate information and hence are regarded as a crucial pillar to examine climatic cycles on the time-scale of Earth-orbital phenomena. Since the bottom ice in Dome A is estimated to be older than a million years, a deep drilling there becomes a new focus for ice core studies. | REN JiaWen XlAO CunDe HOU ShuGui LI YuanSheng SUN Bo | 2009 | Chinese Science Bulletin2009，54，6： | 10 |
| 17 | Climatic significance of the stable carbon isotope composition of tree-ring cellulose:Comparison of Chinese hemlock (Tsuga chinensis Pritz) and alpine pine (Pinus densata Mast) in a temperate-moist region of China显示文摘In the reconstruction of past climate using stable carbon isotope composition (δ13C) in tree ring,the responses of the stable carbon composition (δ13C) of multiple tree species to environmental factors must be known detailedly. This study presented two δ13C series in annual tree rings for Chinese hem-lock (Tsuga chinensis Pritz) and alpine pine (Pinus densata Mast),and investigated the relationships between climatic parameters and stable carbon discrimination (△13C) series,and evaluated the poten-tial of climatic reconstruction using △13C in both species,in a temperate-moist region of Chuanxi Pla-teau,China. The raw δ13C series of the two species was inconsistent,which may be a result of different responses caused by tree's inherent physiological differences. After removing the low-frequency ef-fects of CO2 concentration,the high-frequency (year-to-year) inter-series correlation of △13C was strong,indicating that △13C of the two tree species were controlled by common environmental conditions. The △13C series of the species were most significantly correlated with temperature and moisture stress,but in different periods and intensity between the species. During the physiological year,the impacts of temperature and moisture stress on △13C occur earlier for Chinese hemlock (previous December to February for moisture stress and February to April for temperature,respectively) than for alpine pine (March to May for moisture stress and April to July for temperature,respectively). In addition,in temperate-moist regions,the control on △13C of single climatic parameter was not strongly dominant and the op-timal multiple regressions functions just explained the 38.5% variance of the total. Therefore,there is limited potential for using δ13C alone to identify clear,reliable climatic signals from two species. | LIU XiaoHong SHAO XueMei WANG LiLi ZHAO LiangJu WU Pu CHEN Tuo QIN DaHe REN JiaWen | 2007 | Science China Earth Sciences2007，50，7： | 10 |
| 18 | Bioinspired micro/nanostructured surfaces prepared by femtosecond laser direct writing for multi-functional applications显示文摘manufacturing of biomimetic micro/nanostructures due to its specific advantages including high precision,simplicity,and compatibility for diverse materials in comparison with other methods(e.g.ion etching,sol-gel process,chemical vapor deposition,template method,and self-assembly).These biomimetic micro/nanostructured surfaces are of significant interest for academic and industrial research due to their wide range of potential applications,including self-cleaning surfaces,oil-water separation,and fog collection.This review presents the inherent relationship between natural organisms,fabrication methods,micro/nanostructures and their potential applications.Thereafter,we throw a list of current fabrication strategies so as to highlight the advantages of FLDW in manufacturing bioinspired microstructured surfaces.Subsequently,we summarize a variety of typical bioinspired designs(e.g.lotus leaf,pitcher plant,rice leaf,butterfly wings,etc)for diverse multifunctional micro/nanostructures through extreme femtosecond laser processing technology.Based on the principle of interfacial chemistry and geometrical optics,we discuss the potential applications of these functional micro/nanostructures and assess the underlying challenges and opportunities in the extreme fabrication of bioinspired micro/nanostructures by FLDW.This review concludes with a follow up and an outlook of femtosecond laser processing in biomimetic domains. | Yiyuan Zhang Yunlong Jiao Chuanzong Li Chao Chen Jiawen Li Yanlei Hu Dong Wu Jiaru Chu | 2020 | International Journal of Extreme Manufacturing2020，2，3： | 9 |
| 19 | A 780-year record of explosive volcanism from DT263 ice core in east Antarctica显示文摘从极的冰表恢复的冰核心从爆炸暴烈的爆发收到了并且保存硫磺的酸放射性尘埃, DT263 冰核心从东方 Antarcticlocation 被检索。冰核心用年度层作为 780 年(1215-1996 A.D ) 数和暴烈的 timestratigraphic 地平线的联合被标明日期。冰核心记录在约 1460 的时期期间表明那 - 1800 A.D,累积是比层次在以前并且在这个时期以后严厉地低的。这个时期与最近的 neoglacial 与气候的事件一致,“很少冰川期(LIA ) ”,那在众多的北半球代理和历史性的记录被发现了。non-sea-salt SO_2 集中在 DT263ice 核心显示十七个暴烈的事件。与那些相比从以前的南极冰核心,重要差异在几个著名事件的相对暴烈的流动在这些记录之间被发现。在这些记录之中的差异可以被差别在在冰核心上加亮本地冰河学的潜在的影响的表面地形学,累积率,雪飘移和分发解释暴烈的记录,分析技术为硫酸盐测量使用了,等等。在中间、高的南部的纬度的暴烈的爆发在低纬度比那些更强烈地在南极雪中影响暴烈的记录。 | ZHOU-Liya LI Yuansheng Jihong Cole-dai TAN Dejun SUN Bo REN Jiawen WEI Lijia WANG Henian | 2006 | Chinese Science Bulletin2006，51，22： | 9 |
| 20 | Restraining effect of nitrogen on coal oxidation in different stages:Non-isothermal TG-DSC and EPR research显示文摘Nitrogen is widely used to prevent the spontaneous combustion of coal in underground coal mines. A spontaneous combustion-prone coal seam was studied to investigate the restraining effect of nitrogen on coal oxidation in different oxidation stages, based on non-isothermal thermogravimetry-differential scanning calorimetry(TG-DSC) and electron paramagnetic resonance(EPR) experiments. We found that the key feature temperatures grow steadily with increasing nitrogen in the oxidation environment,resulting in longer oxidation stages. The most significant finding is that there is a stagnation of the inhibitory effect of nitrogen on coal oxidation in the range of 85.0–95.0% nitrogen in the slow and the rapid oxidation stages, owing to the competitive adsorption of coal by nitrogen and oxygen. However, the restraining effect cannot be reflected by the kinetic parameters of the coal before it reaches the thermal decomposition and combustion stage. Nitrogen can also affect free radical types and free radical concentrations during coal oxidation: the higher the concentration of nitrogen in the oxidation environment, the greater the number of free radical types and the lower the free radical concentration. This experimental study improves the understanding of the restraining effect of nitrogen on coal oxidation in different oxidation stages and provides an important reference for coal fire prevention in spontaneous combustionprone coal seams. | Tongyu Zhao Shengqiang Yang Xincheng Hu Wanxin Song Jiawen Cai Qin Xu | 2020 | International Journal of Mining Science and Technology2020，30，3： | 9 |
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