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20篇 您的检索式:作者名="ZHANG Qingwu"
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1Effects 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 2010Mining Science and Technology2010,20,6:12
2Efficient 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 2019Science China Chemistry2019,62,1:4
3Asymmetric 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 2018Journal of Meteorological Research2018,32,5:3
4Area,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 2021Geo-Spatial Information Science2021,24,3:2
5Green 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 2011Cancer Epidemiology2011,,4:2
6A 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 2020Journal of Wuhan University of Technology(Materials Science)2020,35,2:2
7Synthesis of highly active and porous NiCoP catalysts via directly thermal treatment of a mechanical mixing of nickel, cobalt salts and sodium hypophosphite显示文摘Limin Song Shujuan Zhang Qingwu Wei 2011Powder Technology2011,,:1
8Accelerated high-solids anaerobic digestion of sewage sludge using low-temperature thermal pretreatmant显示文摘Xiaoeong Liao Huan Li Yuyao Zhang Can Liu Qingwu Chen 2016International Biodeterioration & Biodegradation2016,,106:1
9The impacts of mobility models on DV-hop based localization in Mobile Wireless Sensor Networks显示文摘Guangjie Han Jia Chao Chenyu Zhang Lei Shu Qingwu Li 2014Journal of Network and Computer Applications2014,,:1
10RemobiIization of water soluble carbohydrates in non - leaf organs and contribution to grain yield in winter wheat under reduced irrigation 显示文摘Yangping Zhang Yinghua Zhang Qingwu Xue 2013International Journal of Plant Production2013,7,1:1
11Laser cladding of Ni-base composite coating onto Ti26A124V substrates with pre-placedB4C+NiCrBSi powders显示文摘MENG Qingwu GENG Lin ZHANG Baoyou 2006Surface and Coatings Technology2006,200,1617:1
12Metformin for Liver Cancer Prevention in Patients with Type 2 Diabetes: A Systematic Review and Meta-Analysis显示文摘Zhi-Jiang Zhang Zhi-Jie Zheng Rong Shi Qing Su Qingwu Jiang Kevin E. Kip 2012The Journal of Clinical Endocrinology & Metabolism2012,,7:1
13Metformin for Liver Cancer Prevention in Patients with Type 2 Diabetes: A Systematic Review and Meta-Analysis显示文摘Zhi-Jiang Zhang Zhi-Jie Zheng Rong Shi Qing Su Qingwu Jiang Kevin E. Kip 2012The Journal of Clinical Endocrinology & Metabolism2012,,7:1
14Laser cladding of Ni-base composite coatings onto Ti-6A1-4V substrates with pre-placed B4C+NiCrBSi powders 显示文摘MENG Qingwu GENG Lin ZHANG Baoyou 2006Surface and Coatings Technology2006,200,1617:1
15β-decay Study of Tz=-3/2Proton-rich Nucleus 29S显示文摘The exotic decay of nuclei far from the stability has recently become a hot topic of nuclear structure research.The nuclide 29S is not well investigated in the A=4n+1,Tz=-3/2series of strong+β-delayed proton precursors.The decay schemes of these nuclei are characterizedZHONG Fupeng XU Xinxing LIN Chengjian WANG Jiansong LI Zhihuan YANG Lei MA Nanru WANG Dongxi WEN Peiwei SUN Lijie WU Hongyi LUO Diwen WU Chenguang JIANG Ying LIU Yang ZANG Hongliang LIANG Pengfei LI Pengjie LI Xiaojing ZHAO Qingqing SHI Guozhu MA Junbing MA Peng YU Gongming Dipikap Patel BAI Zhen YANG Feng JIA Huiming ZHANG Huanqiao WANG Jianguo YANG Yanyun MA Weihu HU Qiang JIN Shuya ZHOU Xiaohong LI Ren HOU Dongsheng LIU Minliang HU Zhengguo MA Xinwen YANG Weiqing GAO Zhihao DUAN Fangfang YU Yuechao WANG Yufeng WANG Peng ZHOU Qingwu CUI Danteng WANG Xiang HU Liyuan PAN Min ZHANG Gaolong WANG Xiaoyu 2017Annual Report of China Institute of Atomic Energy2017,,1:0
16Advantages of nasogastric tube feeding during neoadjuvant concurrent chemoradiotherapy for esophageal cancer:A retrospective study显示文摘ObjectiveTo compare the effects of oral intake and nasogastric tube(NG)feeding on nutritional status,complications and survival during neoadjuvant chemoradiotherapy for esophageal squamous-cell carcinoma(ESCC)patients.MethodsA total of 61 ESCC cases treated with neoadjuvant chemoradiotherapy from December 2018 to March 2020 were enrolled,including(38 in oral intake group,and 22 in NG feeding group.Disease characteristics and baseline nutritional markers were collected in both groups.Nutritional status,complication and completion rate of chemoradiotherapy in both groups were evaluated.ResultsCompared with the oral intake group,patients in the NG feeding group had a later T stage(P=0.027)and clinical stage(P=0.014).The levels of energy intake(P=0.033),serum prealbumin(P<0.001),albumin(P=0.017)and hemoglobin(P=0.015)before treatment in NG group were significantly lower than those in oral intake group.Furthermore,patient-generated subjective global assessment(PG-SGA)score(P=0.016)and the levels of serum C-reactive protein(P=0.014)of NG feeding group were significantly higher than those of oral intake group.However,at the end of treatment,PG-SGA scores were increased in oral intake group and decreased in NG feeding group.In addition,the NG feeding group had a lower incidence of grade≥2 esophagitis(P=0.037),and higher completion rate of chemotherapy compared with oral intake group(P=0.034).Meanwhile,the proportion of parenteral nutrition(P=0.008)and anti-inflammatory(P=0.022)treatment in NG feeding group was significantly lower than that in oral intake group.Although patients in the NG feeding group had a worse prognosis,there were no statistically significant differences in overall survival(OS)and progression-free survival(PFS)between the two groups(P>0.05).ConclusionsAs a safe and effective enteral nutrition approach to improving nutrition,nasogastric tube feeding could increase treatment completion rate and reduce the incidence of≥grade 2 esophagitis reaction during neoadjuvant chemoradiotherapy.Jie Dong Qingwu Du Tian Zhang Xi Chen Wencheng Zhang Yajun Chen Yaqi Zeng Chunlei Li Yueying Li Yujie Wang Kun Wang Qingsong Pang 2023Radiation Medicine and Protection2023,4,2:0
17Research on the Stock Price Transmission of China's Monetary Policy显示文摘Ruifeng Zhang Qingwu Zou 2006China-USA Business Review2006,5,2:0
18The energy-free purification of trace thallium(I)-contaminated potable water using a high-selective filter paper with multi-layered Prussian blue decoration显示文摘Thallium is a highly toxic metal,and trace amount of thallium(I)(Tl+)in potable water could cause a severe water crisis,which arouses the exploitation of highly-effective technology for purification of Tl+contaminated water.This report proposes the multi-layered Prussian blue(PB)-decorated composite membranes(PBx@PDA/PEI-FP)based on the aminated filter papers for Tl+uptake.Extensively characterization by Fourier transform infrared spectrometer-attenuated total reflectance,scanning electron microscope,thermogravimetric analysis,X-ray photoelectron spectroscopy and X-ray diffraction were performed to confirm the in situ growth of cubic PB crystals on filter paper membrane surfaces via the aminated layers,and the successful fabrication of multi-layered PB overcoats via the increasing of aminated layers.The effect of PB layers on Tl+removal by PBx@PDA/PEI-FP from simulated drinking water was evaluated as well as the influence of different experimental conditions.A trade-off between PB decoration layer number and PB distribution sizes is existed in Tl+uptake by PBx@PDA/PEI-FP.The double-layered PB2@PDA/PEI-FP membrane showed the maximum sorption capacity,but its Tl+uptake performance was weakened by the acid,coexisting ions(K+and Na+)and powerful operation pressure,during filtrating a large volume of low-concentrated Tl+-containing water.However,the negative effect of coexisting ions on the Tl+uptake could be effectively eliminated in weak alkaline water,and the Tl+removal was increased up to 100%without any pressure driving for PB2@PDA/PEI-FP membrane.Most importantly,PB2@PDA/PEI-FP displayed the high-efficiency and high-selectivity in purifying the Tl+-spiked Pearl River water,in which the residual Tl+in filtrate was less than 2μg·L^(–1) to meet the drinking water standard of United States Environmental Protection Agency.This work provides a feasible avenue to safeguard the drinking water in remote and underdeveloped area via the energy-free operation.Jiangyan Lu Zhu Xiong Yuhang Cheng Qingwu Long Kaige Dong Hongguo Zhang Dinggui Luo Li Yu Wei Zhang Gaosheng Zhang 2024Frontiers of Chemical Science and Engineering2024,18,2:0
19Using RAPD in Neisseria gonorrhoeae genotyping and transmission detection显示文摘The aim of this paper is to develop an applic-able Random Amplified Polymorphic DNAs(RAPD)method for genotyping Neisseria gonorrhoeae strain,and discuss the possibility of using the RAPD method to trace N.gonorrhoeae strain transmission route.Four different pretreatment methods were used on the N.gonorrhoeae genomic DNA component,and the best adaptive extract method was selected for RAPD.Different RAPD primers sequence was used for amplification and their differenti-ating capabilities for N.gonorrhoeae strains were com-pared.Applicable RAPD primer was selected for N.gonorrhoeae genotyping and then applied into transmis-sion detection.The results show that the so called cetyl-trimethylammonium bromide(CTAB)method for extracting genomic DNA could give integrated genomic DNA and give out relatively better RAPD fingerprint maps,subsequently,using selected RAPD primer could give out a group of amplification polymerase chain reac-tion bands.The fingerprint maps from different N.gonor-rhoeae strains were distinctive.Some main segments were common to all the N.gonorrhoeae strains tested.Some segments were different among the N.gonorrhoeae strains.According to the fingerprint maps and similarity index of different N.gonorrhoeae isolates,isolates from a pair of sex-partners were very similar.Based on these findings,the best extracting method and suitable RAPD primer were chosen.The RAPD fingerprint maps could type N.gonorrhoeae effectively and could be used as an additional approach in molecular epidemiology for tracing infection sources.Tiejun ZHANG Xiaoming ZHOU Tao ZHANG Yue CHEN Shunzhang YU Qingwu JIANG 2008Frontiers of Medicine2008,2,3:0
20n-Type Conjugated Polymer Based on Dicyanodistyrylbenzene and Naphthalene Diimide Units for All-Polymer Solar Cells显示文摘Baitian He Qingwu Yin Jie Zhang Tao Jia Xiye Yang Xiao-Fang Jiang Fei Huang Yong Cao 2018Chinese Journal of Chemistry2018,36,5:0
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