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| 1 | Chemical composition of PM_(2.5) during winter in Tianjin,China显示文摘PM2.5 samples for 24 h were collected during winter in Tianjin,China. The ambient mass concentration and chemical composition of the PM2.5 were determined. Ionic species were analyzed by ion chromatog-raphy,while carbonaceous species were determined with the IMPROVE thermal optical reectance(TOR) method,and inorganic elements were measured by inductively coupled plasma-atomic emission spec-trometer. The daily PM2.5 mass concentrations ranged from 48.2 to 319.2 g/m3 with an arithmetic average of 144.6 g/m3. The elevated PM2.5 in winter was mostly attributed to combustion sources such as vehicle exhaust,heating,cooking and industrial emissions,low wind speeds and high relative humidity(RH) ,which were favorable for pollutant accumulation and formation of secondary pollutants. By chem-ical mass balance,it was estimated that about 89.1% of the PM2.5 mass concentrations were explained by carbonaceous species,secondary particles,crustal matters,sea salt and trace elements. Organic material was the largest contributor,accounting for about 32.7% of the total PM2.5 mass concentrations. SO42-,NO3-,Cl- and NH4+ were four major ions,accounting for 16.6%,11.5%,4.7% and 6.0%,respectively,of the total mass of PM2.5. | Jinxia Gu Zhipeng Bai Weifang Li Liping Wu Aixia Liu Haiyan Dong Yiyang Xie | 2011 | Particuology2011，9，3： | 60 |
| 2 | The provincial pattern of the relationship between urbanization and economic development in China显示文摘在省的规模上理解在瓷器都市化和经济开发之间的关系具有深刻理论、实际的意义。在中国在全世界和 31 个省或自治区域从 124 个国家或区域基于数据,使用用象限地图途径的改进方法,这份报纸分析了在瓷器都市化和经济发展水平之间的关系的空间模式。学习识别了下列结果。(1 ) 31 个省级的区域掉进六个范畴:仅仅一个区域在锋利的在都市化上的范畴, 3 个区域在中等在都市化上, 11 细微在都市化上, 8 基本协作,一中等在都市化下面,和七细微在都市化下面。(2 ) 在在都市化和经济开发的水平之间的关系中的省的规模上有重要地区性的差别。(3 ) 都市化和经济开发的省的模式在东方和西方之间是显著地不同的。东方沿海的区域主要是过去城市化的,当中央、西方的区域主要是下面城市化的时。(4 ) 在都市化和经济开发的水平之间的关系类似于马修效果。因此,二重要卓见被建议。首先,在一些发达区域的在都市化上的现象应该用一些担心和警戒看。第二,都市化需要在中央、西方的区域中等被加快。 | CHEN Mingxing HUANG Yongbin TANG Zhipeng LU Dadao LIU Hui MA Li | 2014 | Journal of Geographical Sciences2014，24，1： | 50 |
| 3 | Characteristics of atmospheric single particles during haze periods in a typical urban area of Beijing:A case study in October,2014显示文摘To investigate the composition and possible sources of particles, especially during heavy haze pollution, a single particle aerosol mass spectrometer(SPAMS) was deployed to measure the changes of single particle species and sizes during October of 2014, in Beijing. A total of 2,871,431 particles with both positive and negative spectra were collected and characterized in combination with the adaptive resonance theory neural network algorithm(ART-2a). Eight types of particles were classified: dust particles(dust, 8.1%), elemental carbon(EC, 29.0%), organic carbon(OC, 18.0%), EC and OC combined particles(ECOC, 9.5%),Na-K containing particles(Na K, 7.9%), K-containing particles(K, 21.8%), organic nitrogen and potassium containing particles(KCN, 2.3%), and metal-containing particles(metal,3.6%). Three haze pollution events(P1, P2, P3) and one clean period(clean) were analyzed,based on the mass and number concentration of PM_(2.5)and the back trajectory results from the hybrid single particle Lagrangian integrated trajectory model(Hysplit-4 model). Results showed that EC, OC and K were the major components of single particles during the three haze pollution periods, which showed clearly increased ratios compared with those in the clean period. Results from the mixing state of secondary species of different types of particles showed that sulfate and nitrate were more readily mixed with carbon-containing particles during haze pollution episodes than in clean periods. | Lang Liu Yanli Wang Shiyong Du Wenjie Zhang Lujian Hou Sverre Vedal Bin Han Wen Yang Mindong Chen Zhipeng Bai | 2016 | Journal of Environmental Sciences2016，28，2： | 19 |
| 4 | Characteristics of Dried Soil Layers Under Apple Orchards of Different Ages and Their Applications in Soil Water Managements on the Loess Plateau of China显示文摘Negative soil water balance(i.e., water input < water output) can lead to soil desiccation and subsequently the occurrence of a dried soil layer(DSL). The DSLs are generally studied at a specific sampling depth(e.g., 500 cm), and the actual extent of DSLs remains unknown due to the challenge of collecting deep soil samples. To investigate the characteristics of actual DSLs under different ages of apple orchards and ascertain the optimal age of apple orchards for avoiding/controlling the formation of DSLs, soil samples were collected to a depth of 1 800 cm under apple orchards of different ages in Changwu on the Loess Plateau of China. As the ages increased, soil water content(SWC) and mean SWC in DSLs showed an overall decreasing trend, whereas while DSL thickness and the quantity of water deficit(QWD) in DSLs demonstrated an increasing trend. The DSL was the thickest(1 600 cm) under the 17-year-old orchard, the forming velocity of DSL thickness was the highest at the apple tree growth stage of 9–17 years(168 cm year-1), and the highest increasing velocity of QWD(-181 mm year-1) was also observed at this stage. The thickness of DSL was significantly correlated with growth age and root depth of apple trees(r > 0.88), whereas the QWD and mean SWC in DSLs were found to have no correlation with them. The optimal age of apple orchards for avoiding/controlling the formation of DSLs was about 9 years. This information provided pertinent references for the management of deep water resources by controlling the growth age of plants. | WANG Yunqiang SHAO Mingan LIU Zhipeng ZHANG Chencheng | 2015 | Pedosphere2015，25，4： | 18 |
| 5 | Micro-source Inverters With Capacitive Equivalent Output Impedance for Improving Micro-grid Voltages显示文摘将分布式电源逆变器等效输出阻抗设计成容性可使其体现对系统无功电压调整过程相逆的电源特性,这种特性使得分布式电源逆变器更容易参与公共连接点处的电压调整。对比等效输出阻抗成感性、阻性和容性的3类逆变器下垂控制特性,对容性等效输出阻抗逆变器电压电流控制环进行数学建模;针对容性等效输出阻抗逆变器设计具备下垂调节和克服电压偏离功能的鲁棒功率外环控制器。对比仿真和实验证明,容性输出阻抗分布式电源逆变器控制器能够快速抑制系统功率变化带来的电压波动,能有效地参与系统电压调整。 | LU Zhipeng LIU Haitao SU Jian ZHOU Cheng WU Ming | 2013 | 中国电机工程学报2013，33，9： | 17 |
| 6 | Paleogene Tectonic Evolution Controls on Sequence Stratigraphic Patterns in the Central Part of Deepwater Area of Qiongdongnan Basin, Northern South China Sea显示文摘In active rift basins, tectonism is extremely important for sequence stratigraphic patterns, affecting both the sequence architecture and internal makeup. Sequence stratigraphic framework of a Paleogene rift succession in Qiongdongnan Basin, northern South China Sea, was built using seismic profiles, complemented by well logs and cores. One first-order and three second-order sequences were identified on the basis of basin-scale unconformities, and seven third-order sequences are defined by unconformities along the basin margins and correlative conformities within the central basin. Through unconformity analysis and backstripping procedure, the Paleogene synrift tectonic evolution of deepwater area of Qiongdongnan Basin was proved to be episodic, which can be divided into rifting stage-I, rifting stage-II and rifting stage-III. Episodic rifting resulted in the formation of various types of structural slope break belts, which controlled different architectures and internal makeup of sequences. This study enhances the understanding of the control of tectonic evolution on sequence stratigraphic patterns and establishes relevant patterns in a typical rift basin, and further proposes the favorable sandstone reservoirs developing in different sequence stratigraphic patterns, which will be pretty helpful for subtle pool exploration in deepwater area of petroliferous basins. | Guangzeng Song Hua Wang Huajun Gan Zhipeng Sun Xiaolong Liu Meng Xu Jinfeng Ren Ming Sun Di Sun | 2014 | Journal of Earth Science2014，25，2： | 16 |
| 7 | Change analysis of rice area and production in China during the past three decades显示文摘米饭空间时间的分布,它批评为农业,环境并且食物安全研究,被自然条件以及社会经济的开发影响。把数据基于多来源,一个有效模型说出集成可耕地分发,庄稼数据的行政单位统计,农业灌溉数据和庄稼的空间生产分配模型(垃圾)适用性数据,被用来在国家规模与 10-km 象素得到米饭区域和生产的一系列空间分布它向前从1980年代初被使用并且过去常分析空间、时间的变化的模式。结果证明重要变化在 19802010 期间在中国发生在米饭。总的来说,超过 50% 米饭区域减少了,当将近 70% 米饭生产在 19802010 期间在变化区域增加了时。空间地,特别,大多数增加的区域和生产在吉林和 Heilongjiang 在东北中国;特别,大多数减少的区域和生产在区域位于东南中国很快在广东,福建和浙江的都市化。因此,米饭区域的矩心是自从 1980,向东北移动了约 230 km,并且米饭生产大约 320 km,它移动的工具米饭生产向东北比米饭区域快因为东北中国的重要米饭收益增加。结果也证明那个米饭区域变化在米饭生产变化上有明确的影响。米饭生产的大约 54.5% 增加由于播种区域的扩大,当在在米饭的 83.2% 减少附近生产由于米饭区域的收缩时。这暗示米饭生产增加可能由于区域扩大和另外的非区域因素,但是减少米饭生产能大部分被归因于米饭区域减少。 | LIU Zhenhuan LI Zhengguo TANG Pengqin LI Zhipeng WU Wenbin YANG Peng YOU Liangzhi TANG Huajun | 2013 | Journal of Geographical Sciences2013，23，6： | 15 |
| 8 | Modeling the global ionospheric total electron content with empirical orthogonal function analysis显示文摘In the present work we model the global ionospheric total electron content (TEC) with the analysis of empirical orthogonal functions (EOF). The obtained statistical eigen modes, which makeup the modeled TEC, consist of two factors: the eigen vectors mapping TEC patterns at latitude and longitude (or local time LT), and the corresponding coefficients displaying the TEC variations in different time scales, i.e., the solar cycle, the yearly (annual and semiannual) and the diurnal universal time variations. It is found that the EOF analysis can separate the TEC variations into chief processes and the first two modes illustrate the most of the ionospheric climate properties. The first mode contains both the semiannual component which shows the semiannual ionospheric anomaly and the annual component which shows the annual or non-seasonal ionospheric anomaly. The second mode contains mainly the annual component and shows the normal seasonal ionospheric variation at most latitudes and local time sectors. The annual component in the second mode also manifests seasonal anomaly of the ionosphere at higher mid-latitudes around noontime. It is concluded that the EOF analysis, as a statistical eigen mode method, is resultful in analyzing the ionospheric climatology hence can be used to construct the empirical model for the ionospheric climatology. | WAN WeiXing DING Feng REN ZhiPeng ZHANG ManLian LIU LiBo NING BaiQi | 2012 | Science China(Technological Sciences)2012，55，5： | 15 |
| 9 | Dynamic Field Division of Hydrocarbon Migration,Accumulation and Hydrocarbon Enrichment Rules in Sedimentary Basins显示文摘Hydrocarbon distribution rules in the deep and shallow parts of sedimentary basins are considerably different, particularly in the following four aspects. First, the critical porosity for hydrocarbon migration is much lower in the deep parts of basins: at a depth of 7000 m, hydrocarbons can accumulate only in rocks with porosity less than 5%. However, in the shallow parts of basins (i.e., depths of around 1000 m), hydrocarbon can accumulate in rocks only when porosity is over 20%. Second, hydrocarbon reservoirs tend to exhibit negative pressures after hydrocarbon accumulation at depth, with a pressure coefficient less than 0.7. However, hydrocarbon reservoirs at shallow depths tend to exhibit high pressure after hydrocarbon accumulation. Third, deep reservoirs tend to exhibit characteristics of oil (-gas)-water inversion, indicating that the oil (gas) accumulated under the water. However, the oil (gas) tends to accumulate over water in shallow reservoirs. Fourth, continuous unconventional tight hydrocarbon reservoirs are distributed widely in deep reservoirs, where the buoyancy force is not the primary dynamic force and the caprock is not involved during the process of hydrocarbon accumulation. Conversely, the majority of hydrocarbons in shallow regions accumulate in traps with complex structures. The results of this study indicate that two dynamic boundary conditions are primarily responsible for the above phenomena: a lower limit to the buoyancy force and the lower limit of hydrocarbon accumulation overall, corresponding to about 10%-12% porosity and irreducible water saturation of 100%, respectively. These two dynamic boundary conditions were used to divide sedimentary basins into three different dynamic fields of hydrocarbon accumulation: the free fluid dynamic field, limit fluid dynamic field, and restrain fluid dynamic field. The free fluid dynamic field is located between the surface and the lower limit of the buoyancy force, such that hydrocarbons in this field migrate and accumulate under the influence of, for example, the buoyancy force, pressure, hydrodynamic force, and capillary force. The hydrocarbon reservoirs formed are characterized as 'four high,' indicating that they accumulate in high structures, are sealed in high locations, migrate into areas of high porosity, and are stored in reservoirs at high pressure. The basic features of distribution and accumulation in this case include hydrocarbon migration as a result of the buoyancy force and formation of a reservoir by a caprock. The limit fluid dynamic field is located between the lower limit of the buoyancy force and the lower limit of hydrocarbon accumulation overall; the hydrocarbon migrates and accumulates as a result of, for example, the molecular expansion force and the capillary force. The hydrocarbon reservoirs formed are characterized as 'four low,' indicating that hydrocarbons accumulate in low structures, migrate into areas of low porosity, and accumulate in reservoirs with low pressure, and that oil(-gas)-water inversion occurs at low locations. Continuous hydrocarbon accumulation over a large area is a basic feature of this field. The restrain fluid dynamic field is located under the bottom of hydrocarbon accumulation, such that the entire pore space is filled with water. Hydrocarbons migrate as a result of the molecular diffusion force only. This field lacks many of the basic conditions required for formation of hydrocarbon reservoirs: there is no effective porosity, movable fluid, or hydrocarbon accumulation, and potential for hydrocarbon exploration is low. Many conventional hydrocarbon resources have been discovered and exploited in the free fluid dynamic field of shallow reservoirs, where exploration potential was previously considered to be low. Continuous unconventional tight hydrocarbon resources have been discovered in the limit fluid dynamic field of deep reservoirs; the exploration potential of this setting is thought to be tremendous, indicating that future exploration should be focused primarily in this direction. | PANG Xiongqi LIU Keyu MA Zhongzhen JIANG Zhenxue XIANG Caifu HUO Zhipeng PANG Hong CHEN Junqing | 2012 | Acta Geologica Sinica(English Edition)2012，86，6： | 13 |
| 10 | A land use regression for predicting NO_2 and PM_(10) concentrations in different seasons in Tianjin region,China显示文摘Land use regression (LUR) model was employed to predict the spatial concentration distribution of NO2 and PM10 in the Tianjin region based on the environmental air quality monitoring data. Four multiple linear regression (MLR) equations were established based on the most significant variables for NO2 in heating season (R2 = 0.74), and non-heating season (R2 = 0.61) in the whole study area; and PM10 in heating season (R2 = 0.72), and non-heating season (R2 = 0.49). Maps of spatial concentration distribution for NO2 and PM10 were obtained based on the MLR equations (resolution is 10 km). Intercepts of MLR equations were 0.050 (NO2, heating season), 0.035 (NO2, non-heating season), 0.068 (PM10, heating season), and 0.092 (PM10, non-heating season) in the whole study area. In the central area of Tianjin region, the intercepts were 0.042 (NO2, heating season), 0.043 (NO2, non-heating season), 0.087 (PM10, heating season), and 0.096 (PM10, non-heating season). These intercept values might imply an area’s background concentrations. Predicted result derived from LUR model in the central area was better than that in the whole study area. R2 values increased 0.09 (heating season) and 0.18 (non-heating season) for NO2, and 0.08 (heating season) and 0.04 (non-heating season) for PM10. In terms of R2, LUR model performed more effectively in heating season than non-heating season in the study area and gave a better result for NO2 compared with PM10. | Li Chen Zhipeng Bai Shaofei Kong Bin Han Yan You Xiao Ding Shiyong Du Aixia Liu | 2010 | Journal of Environmental Sciences2010，22，9： | 12 |
| 11 | Spatio-temporal dynamics of maize cropping system in Northeast China between 1980 and 2010 by using spatial production allocation model显示文摘在地区性的规模上理解庄稼模式和他们的变化是为投射 agro 生态系统动力学的一个批评要求。然而,为印射庄稼区域和产量的分发的工具和方法仍然正在缺乏。基于跨熵的理论,一个空间生产分配模型(垃圾) 为介绍在 19802010 期间在东北中国收割系统的玉米的空间与时间的动力学被开发了。模仿的结果显示了那(1 ) 播种区域向北扩展了到 48 獥的玉米吗? | TAN Jieyang YANG Peng LIU Zhenhuan WU Wenbin ZHANG Li LI Zhipeng YOU Liangzhi TANG Huajun LI Zhengguo | 2014 | Journal of Geographical Sciences2014，24，3： | 12 |
| 12 | Effect of lattice distortion on solid solution strengthening of BCC high-entropy alloys显示文摘An analytical model is established to study the influence of lattice distortion and fraction of Hf on the yield strength of the BCC TiNbTaZrHfxmulti-component high entropy alloys(HEAs). Meanwhile, the mechanism of solid solution strengthening caused by lattice distortion is also discussed in the HEA. The distorted unit cell is introduced to indicate the lattice distortion effects induced by the differences of the atomic size and shear modulus by doping other elements in Ti-based metal. The results show that the calculated values of the alloying yield strength considering the path of least resistance are obtained with regard to various grain sizes for the equiatomic TiNbTaZrHf HEA, which is well in line with the experimental results. Furthermore, it is predicted that the alloying yield strength is the largest value in the case of the same grain size for the Hf atomic fraction of 0.122. The meaningful modeling could provide a theoretical method to investigate the yield strength and alloying design of other BCC HEAs in the future. | Zhipeng Wang Qihong Fang Jia Li Bin Liu Yong Liu | 2018 | Journal of Materials Science & Technology2018，34，2： | 11 |
| 13 | Liuwei Dihuang pill suppresses metastasis by regulating the wnt pathway and disrupting β-catenin/T cell factor interactions in a murine model of triple-negative breast cancer显示文摘OBJECTIVE:To investigate if the Liuwei Dihuang pill(LWDHP)can inhibit metastasis to the liver and lungs in mice bearing triple-negative breast cancer(TNBC),and the molecular mechanism underpinning this action.METHODS:Ninety-nine TNBC bearing-mice were distributed randomly to five groups:control(Con),paclitaxel(PTX),low-dose LWDHP(LLP,2.3 g·kg^-1·d^-1),middle-dose LWDHP(MLP,4.6 g·kg^-1·d^-1)and high-dose LWDHP(HLP,9.2 g·kg^-1·d^-1).The LWDHP were administered(p.o.)to the agonal stage.The morphology of BC cells was observed by hematoxylin&eosin staining.Expression of axin-2,β-catenin,T cell factor(TCF),cyclin-D1 and vascular endothelial growth factor(VEGF)was detected by western blotting or immunofluorescence.β-catenin/TCF-1 interaction was measured using a co-immunoprecipitation assay.RESULTS:After LWDHP treatment,metastasis of BC cells to the lungs and liver was inhibited,expression of axin-2 was increased,expression of TCF-1,β-catenin,cyclin-D1 and VEGF was decreased,andβ-catenin/TCF-1 interaction was disrupted.CONCLUSION:The LWDHP could inhibit metastasis of BC cells to the liver and lungs.The molecular mechanism underlying this action may be regulation of protein expression andβ-catenin/TCF-1 interactions in the Wnt pathway. | Zheng Lixiang Zheng Qing Yu Zhipeng Wang Jian Ren Xiaoying Gong Yan Yang Xue Hunag Ping Weng Meizhi Liu Hongning Liu Haizhou | 2019 | Journal of Traditional Chinese Medicine2019，39，6： | 9 |
| 14 | Density-based trajectory outlier detection algorithm显示文摘With the development of global position system(GPS),wireless technology and location aware services,it is possible to collect a large quantity of trajectory data.In the field of data mining for moving objects,the problem of anomaly detection is a hot topic.Based on the development of anomalous trajectory detection of moving objects,this paper introduces the classical trajectory outlier detection(TRAOD) algorithm,and then proposes a density-based trajectory outlier detection(DBTOD) algorithm,which compensates the disadvantages of the TRAOD algorithm that it is unable to detect anomalous defects when the trajectory is local and dense.The results of employing the proposed algorithm to Elk1993 and Deer1995 datasets are also presented,which show the effectiveness of the algorithm. | Zhipeng Liu Dechang Pi Jinfeng Jiang | 2013 | Journal of Systems Engineering and Electronics2013，24，2： | 9 |
| 15 | LICOM Model Datasets for the CMIP6 Ocean Model Intercomparison Project显示文摘The datasets of two Ocean Model Intercomparison Project(OMIP)simulation experiments from the LASG/IAP Climate Ocean Model,version 3(LICOM3),forced by two different sets of atmospheric surface data,are described in this paper.The experiment forced by CORE-II(Co-ordinated Ocean–Ice Reference Experiments,Phase II)data(1948–2009)is called OMIP1,and that forced by JRA55-do(surface dataset for driving ocean–sea-ice models based on Japanese 55-year atmospheric reanalysis)data(1958–2018)is called OMIP2.First,the improvement of LICOM from CMIP5 to CMIP6 and the configurations of the two experiments are described.Second,the basic performances of the two experiments are validated using the climatological-mean and interannual time scales from observation.We find that the mean states,interannual variabilities,and long-term linear trends can be reproduced well by the two experiments.The differences between the two datasets are also discussed.Finally,the usage of these data is described.These datasets are helpful toward understanding the origin system bias of the fully coupled model. | Pengfei LIN Zhipeng YU Hailong LIU Yongqiang YU Yiwen LI Jirong JIANG Wei XUE Kangjun CHEN Qian YANG Bowen ZHAO Jilin WEI Mengrong DING Zhikuo SUN Yaqi WANG Yao MENG Weipeng ZHENG Jinfeng MA | 2020 | Advances in Atmospheric Sciences2020，37，3： | 9 |
| 16 | Behavior of Siderophile and Chalcophile Elements in the Subcontinental Lithospheric Mantle beneath the Changbaishan Volcano,NE China显示文摘The mantle xenoliths in the Quaternary ChangbaishanVolcano in southern Jilin Province contain spinel-facies lherzolites.The equilibration temperatures for these samples range from 902oC to 1064oC based on the two-pyroxene thermometer of Brey and K?hler(1990),and using the oxybarometry of Nell and Wood(1991),the oxidation state was estimated from FMQ-1.32 to-0.38 with an average value of FMQ-0.81(n=8),which is comparable to that of abyssal peridotites and the asthenospheric mantle.The fO2 values of peridotites,together with their bulk rock compositions(e.g.,Mg#,Al2O3,CaO,Ni,Co,Cr) and mineral compositions(e.g.,Mg# of olivine and pyroxene,Cr# [=Cr/[Cr+Al]] and Mg# [=Mg/[Mg+Fe2+] of spinel),suggest that the present-day subcontinental lithospheric mantle(SCLM) beneath the Changbaishan Volcano most likely formed from an upwelling asthenosphere at some time after the late Mesozoic and has undergone a low degree of partial melting.The studied lherzolite xenoliths show low concentrations of S,Cu,and platinum group elements(PGE),which plot a flat pattern on primitive-mantle normalized diagram.Very low concentrations in our samples suggest that PGEs occur as alloys or hosted by silicate and oxide minerals.The compositions of the studied samples are similar to those of peridotite xenoliths in the Longgang volcanic field(LVF) in their mineralogy and bulk rock compositions including the abundance of chalcophile and siderophile elements.However,they are distinctly different from those of peridotite xenoliths in other areas of the North China Craton(NCC) in terms of Cu,S and PGE.Our data suggest that the SCLM underlying the northeastern part of the NCC may represent a distinct unit of the newly formed lithospheric mantle. | WANG Jian LIU Jinlin HATTORI Keiko XU Wenliang XIE Zhipeng SONG Yue | 2012 | Acta Geologica Sinica(English Edition)2012，86，2： | 8 |
| 17 | SnS_2@C Hollow Nanospheres with Robust Structural Stability as High?Performance Anodes for Sodium Ion Batteries显示文摘Constructing unique and highly stable structures with plenty of electroactive sites in sodium storage materials is a key factor for achieving improved electrochemical properties through favorable sodium ion di usion kinetics. An SnS_2@carbon hollow nanospheres(SnS_2@C) has been designed and fabricated via a facile solvothermal route, followed by an annealing treatment. The SnS_2@C hybrid possesses an ideal hollow structure, rich active sites, a large electrode/electrolyte interface, a shortened ion transport pathway, and, importantly, a bu er space for volume change, generated from the repeated insertion/extraction of sodium ions. These merits lead to the significant reinforcement of structural integrity during electrochemical reactions and the improvement in sodium storage properties, with a high specific reversible capacity of 626.8 mAh g^(-1) after 200 cycles at a current density of 0.2 A g^(-1) and superior high-rate performance(304.4 mAh g^(-1) at 5 A g^(-1)). | Shuaihui Li Zhipeng Zhao Chuanqi Li Zhongyi Liu Dan Li | 2019 | Nano-Micro Letters2019，11，1： | 8 |
| 18 | Emission factors of polycyclic aromatic hydrocarbons from domestic coal combustion in China显示文摘Domestic coal stove is widely used in China, especially for countryside during heating period of winter, and polycyclic aromatic hydrocarbons(PAHs) are important in flue gas of the stove. By using dilution tunnel system, samples of both gaseous and particulate phases from domestic coal combustion were collected and 18 PAH species were analyzed by GC-MS. The average emission factors of total 18 PAH species was 171.73 mg/kg, ranging from 140.75 to 229.11 mg/kg for bituminous coals, while was 93.98 mg/kg, ranging from 58.48 to 129.47 mg/kg for anthracite coals. PAHs in gaseous phases occupied 95% of the total of PAHs emission of coal combustion. In particulate phase, 3-ring and 4-ring PAHs were the main components, accounting for 80% of the total particulate PAHs. The total toxicity potency evaluated by benzo[a]pyrene-equivalent carcinogenic power, sum of 7 carcinogenic PAH components and 2,3,7,8-tetrachlorodibenzodioxin had a similar tendency. And as a result, the toxic potential of bituminous coal was higher than that of anthracite coal. Efcient emission control should be conducted to reduce PAH emissions in order to protect ecosystem and human health. | Chunmei Geng Jianhua Chen Xiaoyang Yang Lihong Ren Baohui Yin Xiaoyu Liu Zhipeng Bai | 2014 | Journal of Environmental Sciences2014，26，1： | 8 |
| 19 | A theoretical model for mid-and low-latitude ionospheric electric fields in realistic geomagnetic fields显示文摘The geomagnetic fields,which play important roles in the ionospheric dynamo,can greatly affect the global distribution of ionospheric electric fields,currents and other ionospheric electrodynamics phenomena.In the study of ionospheric electrodynamics phenomena,such as the longitudinal variations of ionospheric electric fields,the non-dipolar component of the geomagnetic fields must be taken into account.In this paper,we deduce a theoretical electric field model for ionospheric dynamo at mid-and low-latitude which adopt a modified magnetic apex coordinates system.In the new electric field model,the geomagnetic fields can be calculated from either the IGRF model or the dipole field model,and the neutral winds and conductivities are calculated based on empirical models.Then the dynamo equation for the electric potential is finally solved in terms of the line-by-line iteration method,and the ionospheric electric fields and currents are derived from the calculated potential.Our model can reproduce the main features of the ionospheric electrodynamics processes,so it will be a useful tool for the investigation of the upper atmosphere and ionosphere. | REN ZhiPeng WAN WeiXing WEI Yong LIU LiBo YU Tao | 2008 | Chinese Science Bulletin2008，53，24： | 7 |
| 20 | Geochemical characteristics and their significances of rare-earth elements in deep-water well core at the Lingnan Low Uplift Area of the Qiongdongnan Basin显示文摘A geochemical analysis of rare-earth elements(REEs) in 97 samples collected from the core of deep-water Well LS-A located at the Lingnan Low Uplift Area of the Qiongdongnan Basin is conducted, with the purpose of revealing the changes of sedimentary source and environment in the study region since Oligocene and evaluating the response of geochemical characteristics of REEs to the tectonic evolution. In the core samples, both ∑REE and ∑LREE(LREE is short for light-group REEs) fluctuate in a relatively wide range, while ∑HREE(HREE is short for heavy-group REEs) maintains a relatively stable level. With the stratigraphic chronology becoming newer, both ∑REE and ∑LREE show a gradually rising trend overall. The ∑REE of the core is relatively high from the bottom of Yacheng Formation(at a well depth of 4 207 m) to the top of Ledong Formation, and the REEs show partitioning characteristics of the enrichment of LREE, the stable content of HREE, and the negative anomaly of Eu to varying degrees. Overall the geochemical characteristics of REEs are relatively approximate to those of China's neritic sediments and loess, with significant 'continental orientation'. The ∑REE of the core is relatively low in the lower part of Yacheng Formation(at a well depth of 4 207–4 330 m), as shown by the REEs partitioning characteristics of the depletion of LREE, the relative enrichment of HREE, and the positive anomaly of Eu; the geochemical characteristics of REEs are approximate to those of oceanic crust and basalt overall, indicating that the provenance is primarily composed of volcanic eruption matters. As shown by the analyses based on sequence stratigraphy and mineralogy, the provenance in study region in the early Oligocene mainly resulted from the volcanic materials of the peripheral uplift areas; the continental margin materials from the north contributed only insignificantly; the provenance developed to a certain extent in the late Oligocene. Since the Miocene, the provenance has ceaselessly expanded from proximal to distal realm, embodying a characteristic of multi-source sedimentation. In the core strata with 31.5, 28.4, 25.5, 23, and 16 Ma from today, the geochemical parameters of REEs and Th/Sc ratio have significant saltation, embodying the tectonic movement events in the evolution of the Qiongdongnan Basin. In the tectonic evolution history of the South China Sea, the South China Sea Movement(34–25 Ma BP, early expansion of the South China Sea), Baiyun Movement(23 Ma BP), late expansion movement(23.5–16.5 Ma BP), expansion-settlement transition, and other important events are all clearly recorded by the geochemical characteristics of REEs in the core. | SUN Zhipeng ZHAI Shikui XIU Chun LIU Xinyu ZONG Tong LUO Wei LIU Xiaofeng CHEN Kui LI Na | 2014 | Acta Oceanologica Sinica2014，33，12： | 7 |
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