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| 1 | Preliminary study on the origin identification of natural gas by the parameters of light hydrocarbon显示文摘The light hydrocarbon composition of 209 natural gas samples and individual light hydrocarbon carbon isotopes of 53 natural gas samples from typical humic-sourced gas and sapropelic-sourced gas in the four basins of China have been determined and analyzed.Some identification parameters for humic-sourced gas and sapropelic-sourced gas are proposed or corrected.The differences of compound-specificδ13C value of individual light hydrocarbon between humic-sourced gas and sapropelic-sourced gas have been founded.The humic-sourced gas has the distribution ofδ13C benzene > -24‰,δ13C toluene >-23‰,δ13C cyclohexane >-24‰andδ13C methyl cyclohexane >-24‰,while the sapropelicsourced gas has the distribution ofδ13C benzene <-24‰,δ13C toluene <-24‰,δ13C cyclohexane <-24‰and δ13C methyl cyclohexane <-24‰.Among the components of C7 light hydrocarbon compound,such as normal heptane(nC7),methyl cyclohexane(MCH)and dimethyl cyclopentane(ΣDMCP),etc,relative contents of nC7 and MCH are influenced mainly by the source organic matter type of natural gas.Therefore,it is suggested that the gas with relative content of nC7 of more than 30%and relative content of MCH of less than 70%is sapropelic-sourced gas,while gas with relative content of nC7 of less than 35%and relative content of MCH of more than 50%is humic-sourced gas.Among components of C5-7 aliphatics, the gas with relative content of C5-7 normal alkane of more than 30%is sapropelic-sourced gas,while the gas with relative content of C5-7 normal alkane of less than 30%is humic-sourced gas.These paremeters have been suggested to identify humic-sourced gas and sapropelic-sourced gas. | HU GuoYi 1,2,3 ,LI Jian 1,2 ,LI Jin 1,2 ,LI ZhiSheng 1,2 ,LUO Xia 1,2 ,SUN QingWu 1,2 &MA ChengHua 1,2 1 Research Institute of Petroleum Exploration and Development(Langfang Branch),Petrochina,Langfang 065007,China 2 The Key Laboratory of Gas Formation and Development,Petrochina,Langfang 065007,China 3 College of Geo-Resources and Information,China University of Petroleum,Beijing 102200,China | 2008 | Science China Earth Sciences2008，51，S1： | 19 |
| 2 | Effects of coal rank, Fe_3O_4 amounts and activation temperature on the preparation and characteristics of magnetic activated carbon显示文摘Coal-based Magnetic Activated Carbons (CMAC’s) were prepared from three representative coal samples of various ranks: Baorigele lignite from Inner Mongolia; Datong bitumite from Shanxi province; and Taixi anthracite from Ningxia Hui Auto-nomous Region. Fe3O4 was used as a magnetic additive. A nitrogen-adsorption analyzer was used to determine the specific surface area and pore structure of the resulting activated carbons. The adsorption capacity was assessed by the adsorption of iodine and methylene blue. X-ray diffraction was used to measure the evolution behavior of Fe3O4 during the preparation process. Magnetic properties were characterized with a vibrating-sample magnetometer. The effect of the activation temperature on the performance of CMAC’s was also studied. The results show that, compared to Baorigele lignite and Taixi anthracite, the Datong bitumite is more appropriate for the preparation of CMAC’s with a high specific surface area, an advanced pore structure and suitable magnetic properties. Fe3O4 can effectively enhance the magnetic properties and control the pore structure by increasing the ratio of meso-pores. An addition of 6.0% Fe3O4 and an activation temperature of 880 °C produced a CMAC having a specific surface area, an iodine adsorption, a methylene blue adsorption and a specific saturation magnetization of 1152.0 m2/g, 1216.7 mg/g, 229.5 mg/g and 4.623 emu/g, respectively. The coal used to prepare this specimen was Datong bitumite. | YANG Mingshun XIE Qiang ZHANG Jun LIU Juan WANG Yan ZHANG Xianglan ZHANG Qingwu | 2010 | Mining Science and Technology2010，20，6： | 12 |
| 3 | Land-based mobile mapping system with its applications for the Olympic Games显示文摘There is a trend for rapid spatial data capture supported by integration of multiple platforms and multiple sensors.This paper presents the principles and technologies of land-based mobile mapping systems based on an integration of remote sensing,GPS and GIS technologies.The innovations and advantages of the integrated system are described.The analytic model and error model of a mobile mapping system are proposed and the application interface of digital measurable images is also discussed.A Truemap Engine? with Plug-in and API is designed to manage a huge volume of stereo image series from a land-based mobile mapping system so that other geographic information systems(GIS) engines can freely use the sequence of stereo images.The applications of digital measurable images(DMI) as well as mobile mapping systems in the Olympic Games in Beijing,2008 are presented. | LI DeRen HU QingWu GUO Sheng CHEN ZhiYong | 2009 | Chinese Science Bulletin2009，54，13： | 6 |
| 4 | Effects of light quality on growth and development of cucumber seedlings in controlled environment显示文摘Conventional light sources have been successfully used to cultivate a wide variety of horticultural crops.However,they are of limited use due to uncontrollability of spectra and energy inefficiency.Light-emitting diodes(LEDs)emerged with tremendous potential in controlled environment agriculture due to their energy efficiency,longevity,and spectral specificity,but the effects of different types of LEDs on plant growth and development must be examined.In this study,cucumber(Cucumis sativus L.cv.Zhongnong 26)seedlings were grown under four different lighting treatments that each delivered a photosynthetic photon flux density of 200μmol/m2·s at plant canopy including triphosphate fluorescent lamps(TF),high-frequency fluorescent lamps(HF),white LEDs(WL),and red and blue LEDs(RBL).Cucumber seedlings were grown in a growth chamber at(25.0±1.5)℃with 12-hour light and 12-hour dark for 30 days after sowing,and data were subsequently collected.Seedlings grown under the WL were 45%,12%,and 40%taller than those grown under the TF,HF and RBL,respectively.The leaf area was 23%smaller under the TF than under the HF.The shoot dry weight was 16%-22%lower under the TF than under the other lighting treatments.The transplants grown under the RBL had the lowest root dry weight and root to shoot ratio.The seedling quality index was similar among all the lighting treatments.The LEDs treatment yielded more total dry weight with unit electric power compared to the fluorescent lamps.The chlorophyll content was 13%-15%higher in plants grown under the HF and WL than that under the TF and RBL.Plants grown under the WL and RBL had greater photosynthetic rate,transpiration rate,and stomatal conductance than those grown under the TF and HF.It was concluded that high quality cucumber seedlings can be efficiently produced under the broad-spectrum WL that emit a reasonable amount of blue,green and red light,and the lack of green light and/or high ratio of red to blue light under the RBL may cause undesired plant attributes. | Song Jinxiu Meng Qingwu Du Weifen He Dongxian | 2017 | International Journal of Agricultural and Biological Engineering2017，10，3： | 4 |
| 5 | Low-intensity aerobic exercise training attenuates airway inflammation and remodeling in a rat model of steroid-resistant asthma显示文摘 | Qin Qingwu Chen Xi Feng Juntao Qin Ling Hu Chengping | 2014 | Chinese Medical Journal2014，，17： | 4 |
| 6 | SERS detection of arsenic in water:A review显示文摘Arsenic(As) is one of the most toxic contaminants found in the environment. Development of novel detection methods for As species in water with the potential for field use has been an urgent need in recent years. In past decades, surface-enhanced Raman scattering(SERS)has gained a reputation as one of the most sensitive spectroscopic methods for chemical and biomolecular sensing. The SERS technique has emerged as an extremely promising solution for in-situ detection of arsenic species in the field, particularly when coupled with portable/handheld Raman spectrometers. In this article, the recent advances in SERS analysis of arsenic species in water media are reviewed, and the potential of this technique for fast screening and field testing of arsenic-contaminated environmental water samples is discussed. The problems that remain in the field are also discussed and an outlook for the future is featured at the end of the article. | Jumin Hao Mei-Juan Han Songman Han Xiaoguang Meng Tsan-Liang Su Qingwu K.Wang | 2015 | Journal of Environmental Sciences2015，27，10： | 4 |
| 7 | Efficient organic-inorganic hybrid cathode interfacial layer enabled by polymeric dopant and its application in large-area polymer solar cells显示文摘An organic-inorganic hybrid cathode interfacial layer(CIL) was developed by doping ZnO with the naphthalene-diimide based derivative NDI-PFNBr. It was found the resulting organic-inorganic hybrid CIL showed apparently improved conductivity and could act as an effective cathode interlayer to modify indium tin oxide(ITO) transparent electrodes. As a result, by employing the blend of PTB7-Th:PC71BM as the photoactive layer, the inverted polymer solar cells(PSCs) exhibited a remarkable enhancement of power conversion efficiency(PCE) from 8.52% for the control device to 10.04% for the device fabricated with the hybrid CIL. Moreover, all device parameters were simultaneously improved by using this hybrid CIL. The improved open-circuit voltage(VOC) was attributed to the reduced work function of the ITO cathode, whereas the enhancements in fill factor(FF) and short-circuit current density(JSC) were assigned to the increased conductivity and more effective charge extraction and collection at interface. Encouragingly, when the thickness of the hybrid CIL was increased to 80 nm, the resulting device could still keep a PCE of 8.81%, exhibiting less thickness dependence. Considering these advantages, 16 and 93 cm2large-area PSCs modules were successfully fabricated from the hybrid CIL by using doctor-blade coating techniques and yielded a remarkable PCE of8.05% and 4.49%, respectively. These results indicated that the hybrid CIL could be a promising candidate to serve as the cathode interlayer for high-performance large-area inverted PSCs. | Sheng Dong Kai Zhang Xiang Liu Qingwu Yin Hin-Lap Yip Fei Huang Yong Cao | 2019 | Science China Chemistry2019，62，1： | 4 |
| 8 | Asymmetric Ridge–Furrow and Film Cover Improves Plant Morphological Traits and Light Utilization in Rain-Fed Maize显示文摘Light is one of the most important natural resources for plant growth. Light interception(LI) and use efficiency(LUE) are often affected by the structure of canopy caused by growing pattern and agronomy managements. Agronomy practices, such as the ridge–furrow system and plastic film cover, might affect the leaf morphology and then light transmission within the canopy, thus change light extinction coefficient(k), and LI and LUE. The objective of this study is to quantify LI and LUE in rain-fed maize(Zea Mays L.), a major cropping system in Northeast China,under different combinations of ridge–furrow and film covering ratios. The tested ridge–furrow system(DRF:'double ridges and furrows') was asymmetric and alternated with wide ridge(0.70 m in width and 0.15 m in height),narrow furrow(0.10 m), narrow ridge(0.40 m in width and 0.20 m in height), and narrow furrow(0.10 m). Field experiments were conducted in 2013 and 2014 in Jilin Province, Northeast China. Four treatments were tested: no ridges and plastic film cover(control, NRF), ridges without film cover(DRF_0), ridges with 58% film cover(DRF_(58)),and ridges with 100% film cover(DRF_(100)). DRF_0 significantly increased LI by 9% compared with NRF, while film cover showed a marginal improvement. Specific leaf area in DRF experiments with film cover was significantly lower than in NRF, and leaf angle was 16% higher than in NRF, resulting in a 4% reduction in k. LUE of maize was not increased by DRF_0, but was significantly enhanced by covering film in other DRF experiments, especially by22% in DRF_(100). The increase of LUE by film cover was due to a greater biomass production and a lower assimilation portioning to vegetative organs, which caused a higher harvest index. The results could help farmers to optimize maize managements, especially in the region with decreased solar radiation under climate change. | Wanlin DONG Hang YU Lizhen ZHANG Ruonan WANG Qi WANG Qingwu XUE Zhihua PAN Zhigang SUN Xuebiao PAN | 2018 | Journal of Meteorological Research2018，32，5： | 3 |
| 9 | Texture of AZ31B magnesium alloy sheets produced by differential speed rolling technologies显示文摘The effects of differential speed rolling (DSR) on the texture of AZ31B magnesium alloy sheets were investigated, which were achieved by tailoring deformation temperature, reduction, and speed ratio. The results show that the intensity of basal texture weakens with DSR. With the increase of the rolling temperature, the intensity of basal texture decreased first and then increased, which had a relation with the change of the orientation of the new grains of dynamic recrystallization during rolling. The effect of the reduction on the basal texture was made with the changing degree of sharp point of texture. With increasing the deformation at the same rolling temperature, the intensity of basal texture decreased, and the extending of contour lines decreased in the transverse direction, which was close to the circular distribution. Differential speed ratio has a greater impact on the intensity of the basal texture and has a less effect on the basal deflection. | LIU Huaqiang TANG Di CAI Qingwu LI Zhen | 2012 | Rare Metals2012，31，5： | 2 |
| 10 | Area,lake-level and volume variations of typical lakes on the Tibetan Plateau and their response to climate change,1972-2019显示文摘Most lakes have undergone significant changes on the Tibetan Plateau in recent decades,affecting water resources on the Tibetan Plateau and its surrounding areas.In this paper,we investigated the variations of 25 lakes in five sub-regions on the Tibetan Plateau from 1972 to 2019 based on SRTM DEM data and Landsat imagery.We used a method to derive lake-levels based on DEM and lake boundaries delineated from Landsat imagery,and then calculated the changes in lake area,level,and volume in 1972 to 2019.We also analyzed the potential impacts of temperature,precipitation,glacial and permafrost melting in lake changes during this period.The results show that the lakes tended to shrink until 2010 in southern and western plateau,after which they began to expand gradually but the overall trend is still shrinking.Limited meltwater from glaciers and permafrost and low precipitation are the main reasons for their shrinkage.The lakes in the central plateau,northwest plateau and northeast plateau tend to expand overall.The reason for the expansion of the lakes is not only precipitation but also the melting of glaciers and permafrost.Overall,the lake changes have gone through 3 phases,namely a slight decrease during 1972-2000,a rapid increase during 2000-2010,and a slowdown in the last decade(2010-2019).Multiple factors such as temperature,precipitation,the state of glaciers and permafrost have contributed to the changes in the lake. | Ju Zhang Qingwu Hu Yingkui Li Haidong Li Jiayuan Li | 2021 | Geo-Spatial Information Science2021，24，3： | 2 |
| 11 | Green tea consumption, inflammation and the risk of primary hepatocellular carcinoma in a Chinese population显示文摘 | Yanli Li Shen-Chih Chang Binh Y. Goldstein William L. Scheider Lin Cai Nai-Chieh Y. You Heather P. Tarleton Baoguo Ding Jinkou Zhao Ming Wu Qingwu Jiang Shunzhang Yu Jianyu Rao Qing-Yi Lu Zuo-Feng Zhang Lina Mu | 2011 | Cancer Epidemiology2011，，4： | 2 |
| 12 | A Comparative Study of Electrochemical Capacitance of Graphene Oxide Affected by Oligomers of p-phenylenediamine and Hydrazine Hydrate in Solvothermal Condition显示文摘A systematic investigation of the graphene oxide composite reduced by either p-phenylenediamine oligomers or hydrazine hydrate was performed with field emission scanning electron microscopy,high resolution transmission electron microscopy,X-ray diffraction,fourier transform infrared,and X-ray photoelectron spectroscopy analyses.The electrical capacitance of the composite was evaluated by a cyclic voltammetry technique,while the properties of these prototype supercapacitors were measured by a chronopotentiometry technique.It was found that,under the solvothermal condition,the graphene oxide reduced by p-phenylenediamine oligomers was observed to have higher electrical capacitance than that reduced by hydrazine.The improved electrical capacitance can be attributed to that p-phenylenediamine oligomers are the more effective spacers for graphene layers;and they could also provide some pseudo-capacitance to the graphene oxide composite based on their conjugate structure.The results imply that graphene oxide modified by diamine oligomers has a good potential in energy storage devices. | ZHANG Qingqing ZHANG Qingwu LU Hao WANG Wei FANG Tian LIU Hongying LIU Jiaji WANG Shuangshuang | 2020 | Journal of Wuhan University of Technology(Materials Science)2020，35，2： | 2 |
| 13 | Brittle-ductile Transition in PP/EPDM Blends: Effect of Notch Radius显示文摘 | Li Huang Qingwu Pei Qiang Yuan | 2003 | Polymer2003，，44： | 1 |
| 14 | Enhanced photocatalytic activity of chemically bonded TiO2/graphene composites based on the effective interfacial charge transfer through the C-Ti bond显示文摘 | Huang Qingwu Tian Shouqin Zeng Dawen | 2013 | Acs Catalysis2013，3，7： | 1 |
| 15 | The adipokine lipccalin 2 is regulated by obesity and promotes insulin resistance显示文摘 | Yah Qingwu Yang Qin Mody N | 2007 | Diabetes2007，56，10： | 1 |
| 16 | Evaluation and design of fiber-reinforced asphalt mixtures显示文摘 | CHEN Huaxin XU Qingwu CHEN Shuanfa | 2009 | Mate- rims and design2009，30，7： | 1 |
| 17 | Laser cladding NiCoCrAlY coating on Ti-6Al-4V显示文摘 | MENG Qingwu GENG Lin NI Dingrui | 2005 | Materials Letter2005，59，： | 1 |
| 18 | A low-carbon dispatch model in a wind power integrated system considering wind speed forecasting and energy-environmental efficiency显示文摘 | Chen Daojun Gong Qingwu Zou Bichang | 2012 | Energies2012，5，4： | 1 |
| 19 | Characteristics and sexually transmitted diseases of male rural migrants in a metropolitan area of Eastern China显示文摘 | Na He Roger Detels Jinde Zhu Qingwu Jiang Zheng Chen | 2005 | Sexually Transmitted Disease2005，32，5： | 1 |
| 20 | Road Vehicle Monitoring System Based on Intelligent Visual Internet of Things显示文摘 | Li Qingwu Cheng Haisu Zhou Yan | 2015 | Journal of Sensors2015，151，： | 1 |
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