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23篇 您的检索式:作者名="HU Xingang"
    题名 作者 年代 出处 被引量
1Role of secondary aerosols in haze formation in summer in the Megacity Beijing显示文摘A field experiment from 18 August to 8 September 2006 in Beijing, China, was carried out. A hazy day was defined as visibility < 10 km and RH(relative humidity) < 90%. Four haze episodes, which accounted for ~ 60% of the time during the whole campaign, were characterized by increases of SNA(sulfate, nitrate, and ammonium) and SOA(secondary organic aerosol) concentrations. The average values with standard deviation of SO2-+4, NO-3, NH4 and SOA were 49.8(± 31.6), 31.4(±22.3), 25.8(±16.6) and 8.9(±4.1) μg/m3, respectively, during the haze episodes, which were 4.3, 3.4, 4.1, and 1.7 times those in the non-haze days. The SO2-4,NO-3, NH+4, and SOA accounted for 15.8%, 8.8%, 7.3%, and 6.0% of the total mass concentration of PM10 during the non-haze days. The respective contributions of SNA species to PM10 rose to about27.2%, 15.9%, and 13.9% during the haze days, while the contributions of SOA maintained the same level with a slight decrease to about 4.9%. The observed mass concentrations of SNA and SOA increased with the increase of PM10 mass concentration, however, the rate of increase of SNA was much faster than that of the SOA. The SOR(sulfur oxidation ratio) and NOR(nitrogen oxidation ratio) increased from non-haze days to hazy days, and increased with the increase of RH. High concentrations of aerosols and water vapor favored the conversion of SO2 to SO2-4and NO2 to NO-3, which accelerated the accumulation of the aerosols and resulted in the formation of haze in Beijing.Tingting Han Xingang Liu Yuanhang Zhang Yu Qu Limin Zeng Min Hu Tong Zhu 2015Journal of Environmental Sciences2015,27,5:22
2Chemical characterization of size-resolved aerosols in four seasons and hazy days in the megacity Beijing of China显示文摘Size-resolved aerosol samples were collected by MOUDI in four seasons in 2007 in Beijing. The PM10 and PM1.8mass concentrations were 166.0 ± 120.5 and 91.6 ± 69.7 μg/m^3, respectively,throughout the measurement, with seasonal variation: nearly two times higher in autumn than in summer and spring. Serious fine particle pollution occurred in winter with the PM1.8/PM10 ratio of 0.63, which was higher than other seasons. The size distribution of PM showed obvious seasonal and diurnal variation, with a smaller fine mode peak in spring and in the daytime. OM(organic matter = 1.6 × OC(organic carbon)) and SIA(secondary inorganic aerosol) were major components of fine particles, while OM, SIA and Ca_2+were major components in coarse particles. Moreover, secondary components, mainly SOA(secondary organic aerosol) and SIA,accounted for 46%–96% of each size bin in fine particles, which meant that secondary pollution existed all year. Sulfates and nitrates, primarily in the form of(NH_4)_2SO_4, NH_4NO_3, Ca SO_4, Na_2SO_4 and K_2SO_4, calculated by the model ISORROPIA II, were major components of the solid phase in fine particles. The PM concentration and size distribution were similar in the four seasons on non-haze days, while large differences occurred on haze days, which indicated seasonal variation of PM concentration and size distribution were dominated by haze days. The SIA concentrations and fractions of nearly all size bins were higher on haze days than on non-haze days, which was attributed to heterogeneous aqueous reactions on haze days in the four seasons.Kang Sun Xingang Liu Jianwei Gu Yunpeng Li Yu Qu Junling An Jingli Wang Yuanhang Zhang Min Hu Fang Zhang 2015Journal of Environmental Sciences2015,27,6:19
3Effects of NO_x and VOCs from Five Emission Sources on Summer Surface O_3 over the Beijing–Tianjin–Hebei Region显示文摘The impacts of emissions from industry, power plant, transportation, residential, and biogenic sources on daily maximum surface ozone(O3DM) over the Beijing–Tianjin–Hebei(BTH) region in North China in the summer of 2007 were examined in a modeling study. The modeling system consisted of the Weather Research and Forecasting(WRF) model and the photochemical dispersion model, CAMx. The factor separation technique(FST) was used to quantify the effect of individual emission source types and the synergistic interactions among two or more types. Additionally, the effectiveness of emission reduction scenarios was explored. The industry, power plant, and transportation emission source types were found to be the most important in terms of their individual effects on O3DM. The key contributor to high surface O3was power plant emissions, with a peak individual effect of 40 ppbv in the southwestern BTH area. The individual effect from the biogenic emission category was quite low. The synergistic effects from the combinations of each pair of anthropogenic emission types suppressed O3formation, while the synergistic effects for combinations of three were favorable for O3formation when the industrial and power plant emission source types coexisted. The quadruple synergistic effects were positive only with the combination of power plant, transportation, residential, and biogenic sources, while the quintuple synergistic effect showed only minor impacts on O3DMconcentrations. A 30% reduction in industrial and transportation sources produced the most effective impacts on O3concentrations, with a maximum decrease of 20 ppbv. These results suggested that the synergistic impacts among emission source types should be considered when formulating emission control strategies for O3reduction.QU Yu AN Junling LI Jian CHEN Yong LI Ying LIU Xingang HU Min 2014Advances in Atmospheric Sciences2014,31,4:13
4Chemical characteristics of size-resolved aerosols in winter in Beijing显示文摘Size-resolved aerosols were continuously collected by a Nano Sampler for 13 days at an urban site in Beijing during winter 2012 to measure the chemical composition of ambient aerosol particles. Data collected by the Nano Sampler and an ACSM(Aerodyne Aerosol Chemical Speciation Monitor) were compared. Between the data sets,similar trends and strong correlations were observed,demonstrating the validity of the Nano Sampler. PM10 and PM2.5concentrations during the measurement were 150.5 ± 96.0 μg/m3(mean ± standard variation)and 106.9 ± 71.6 μg/m3,respectively. The PM2.5/PM10 ratio was 0.70 ± 0.10,indicating that PM2.5dominated PM10. The aerosol size distributions showed that three size bins of 0.5–1,1–2.5 and 2.5–10 μm contributed 21.8%,23.3% and 26.0% to the total mass concentration(TMC),respectively. OM(organic matter) and SIA(secondary ionic aerosol,mainly SO42-,NO3-and NH4+) were major components of PM2.5. Secondary compounds(SIA and secondary organic carbon) accounted for half of TMC(about 49.8%) in PM2.5,and suggested that secondary aerosols significantly contributed to the serious particulate matter pollution observed in winter. Coal burning,biomass combustion,vehicle emissions and SIA were found to be the main sources of PM2.5. Mass concentrations of water-soluble ions and undetected materials,as well as their fractions in TMC,strikingly increased with deteriorating particle pollution conditions,while OM and EC(elemental carbon) exhibited different variations,with mass concentrations slightly increasing but fractions in TMC decreasing.Kang Sun Yu Qu Qiong Wu Tingting Han Jianwei Gu Jingjing Zhao Yele Sun Qi Jiang Ziqi Gao Min Hu Yuanhang Zhang Keding Lu Stephan Nordmann Yafang Cheng Li Hou Hui Ge Masami Furuuchi Mitsuhiko Hata Xingang Liu 2014Journal of Environmental Sciences2014,26,8:9
5A Constitutive Model of Granite Shear Creep under Moisture显示文摘Previous constitutive models of granite shear creep have two limitations:(1) although moisture greatly affects granite shear creep behavior, currently there are no constitutive models that include this factor;(2) there are also no models that include an acceleration stage. This paper presents an improved Burgers constitutive model with the addition of a damage parameter to characterize the moisture effect and uses a nonlinear relation equation between stress and strain for inclusion as the acceleration stage. The damage parameter is determined from granite creep experiment under four different moisture contents(0%, 0.22%, 0.49%, and 0.79%). The nonlinear relation equation is obtained by fitting a dataset of stain versus time under five different loading stages. To verify the presented model, a creep experiment was conducted on other granite samples and the results show that the model agrees well with the experimental observation data.Xingang Wang Bin Hu Huiming Tang Xinli Hu Jiading Wang Lei Huang 2016Journal of Earth Science2016,27,4:8
6Small interfering RNA targeted to secretory clusterin blocks tumor growth, motility, and invasion in breast cancer显示文摘Clusterin/apolipoprotein J (Clu ) 是在几个生理的过程被含有的无所不在地表示的分泌 heterodimeric glycoprotein。这被报导了分泌 clusterin (sClu ) 的提高的水平蛋白质在乳癌病人与差的幸存被联系并且能在啮齿类动物模型导致转移。在这研究,我们在 vitro 并且在 vivo 在细胞活动性,侵略,和生长上与小介入 RNA (siRNAs ) 调查了 sClu 抑制的效果。MDA-MB-231 房间是有 pSuper-siRNA/sClu 的 transfected。房间幸存和增长被 3-(4,5-dimethyl-thiazol-2yl ) 检验 -5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium 和 clonogenic 幸存试金。结果证明 sClu silencing 显著地禁止了 MDA-MB-231 房间的增长。侵略和迁居能力戏剧性地也被减少,它被 matrigel 试金检测。染色的 TUNEL 和 caspase-3 活动试金证明 sClu silencing 能也增加房间的 apoptosis 率,导致房间生长的抑制。我们也在一个 orthotopic 乳癌模型在肿瘤生长和变形前进上决定了 sClu silencing 的效果。结果比肿瘤源于父母 MDA-MB-231 或 MDA-MB-231/pSuper 的证明主要肿瘤从 MDA-MB-231/pSuper sClu siRNA 房间导出的 orthotopic 变得显著地慢爬 siRNA 房间,并且少些转移到肺。这些数据建议能分泌的 clusterin 在肿瘤生长和变形前进起一个重要作用。敲门下面 sClu 基因表示可以为乳癌治疗提供一个珍贵方法。Zhaohe Niu Xinhui Li Bin Hu Rong Li Ligang Wang Lilin Wu Xingang Wang 2012Acta Biochimica et Biophysica Sinica2012,44,12:6
7Aerosol optical properties under different pollution levels in the Pearl River Delta(PRD) region of China显示文摘To clarify the aerosol hygroscopic growth and optical properties of the Pearl River Delta(PRD)region,integrated observations were conducted in Heshan City of Guangdong Province from October 19 to November 17,2014.The concentrations and chemical compositions of PM2.5,aerosol optical properties and meteorological parameters were measured.The mean value of PM2.5 increased from less than 35(excellent)to 35-75μg/m^3(good)and then to greater than 75μg/m^3(pollution),corresponding to mean PM2.5 values of 24.9,51.2,and 93.3μg/m^3,respectively.The aerosol scattering hygroscopic growth factor(f(RH=80%))values were 2.0,2.12,and 2.18 for the excellent,good,and pollution levels,respectively.The atmospheric extinction coefficient(σext)and the absorption coefficient of aerosols(σap)increased,and the single scattering albedo(SSA)decreased from the excellent to the pollution levels.For different air mass sources,under excellent and good levels,the land air mass from northern Heshan had lower f(RH)andσsp values.In addition,the mixed aerosol from the sea and coastal cities had lower f(RH)and showed that the local sources of coastal cities have higher scattering characteristics in pollution periods.Liuwei Kong Min Hu Qinwen Tan Miao Feng Yu Qu Junling An Yuanhang Zhang Xingang Liu Nianliang Cheng 2020Journal of Environmental Sciences2020,32,1:3
8Integrating Oxaliplatin with Highly Luminescent Carbon Dots: An Unprecedented Theranostic Agent for Personalized Medicine显示文摘Min Zheng Shi Liu Jing Li Dan Qu Haifeng Zhao Xingang Guan Xiuli Hu Zhigang Xie Xiabin Jing Zaicheng Sun 2014Mater2014,,21:2
9Impact of excavation loess slope's rainfall infiltration channel显示文摘WANG Xingang HU Bin YU Hongming 2013Journal of Liaoning Technical University(Natural Science)2013,32,9:1
10Prevalence of Dyslipidemia and Associated Factors Among the Hypertensive Rural Chinese Population显示文摘Xingang Zhang Zhaoqing Sun Liqiang Zheng Jue Li Shuangshuang Liu Changlu Xu Jiajin Li Fenfen Zhao Dayi Hu Yingxian Sun 2007Archives of Medical Research2007,,4:1
11Pulse Pressure and Mean Arterial Pressure in Relation to Ischemic Stroke Among Patients With Uncontrolled Hypertension in Rural Areas of China显示文摘Liqiang Zheng Zhaoqing Sun Jue Li Rui Zhang Xingang Zhang Shuangshuang Liu Jiajin Li Changlu Xu Dayi Hu Yingxian Sun 2008Stroke2008,,7:1
12Pulse Pressure and Mean Arterial Pressure in Relation to Ischemic Stroke Among Patients With Uncontrolled Hypertension in Rural Areas of China显示文摘Liqiang Zheng Zhaoqing Sun Jue Li Rui Zhang Xingang Zhang Shuangshuang Liu Jiajin Li Changlu Xu Dayi Hu Yingxian Sun 2008Stroke2008,,7:1
13Applications of knitted mesh fabrication techniques to scaffolds for tissue engineering and regenerative medicine显示文摘Xingang Wang Chunmao Han Xinlei Hu Huafeng Sun Chuangang You Changyou Gao Yang Haiyang 2011Journal of the Mechanical Behavior of Biomedical Materials2011,,7:1
14Performance of K-promoted hydrotalcite-derived CoMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot–NOx removal显示文摘Qian Li Ming Meng Noritatsu Tsubaki Xingang Li Zhaoqiang Li Yaning Xie Tiandou Hu Jing Zhang 2009Applied Catalysis B, Environmental2009,,1:1
15Study on roasting process of zircon-silica sol ceramic mould显示文摘Dry stock of silica sol ceramic mould was prepared by using of colloidal moulding technique with an optimized vacuum drying process.Effect of roasting process on the shrinkage rate and compressive strength of zircon-silica sol ceramic mould,and the relationship between the roasting temperature and microstructure of zircon-silica sol ceramic mould were studied.The optimum roasting temperature of zircon-silica sol ceramic mould gained by the experiments is 900℃ and the holding time is 2 h.The scanning electron microscope(SEM) observation showed the growth of refractory particles during the roasting process.The occurrence of sintering was observed in the zircon-silica sol ceramic mould when roasting temperature was above 1,000℃.Zhang Yeming Zeng Ming Hu Li Liu Xingang Zhang Congzheng 2011China Foundry2011,8,2:1
16Aerosol hygroscopicity and its impact on atmospheric visibility and radiative forcing in Guangzhou during the 2006 PRIDE-PRD campaign显示文摘Xingang Liu Yuanhang Zhang Yafang Cheng Min Hu Tingting Han 2012Atmospheric Environment2012,,:1
17Dynamic Behavior of Phase Synchronization of Chaos 显示文摘ZHAN Meng HU Gang WANG Xingang 2000Chin Phys Lett2000,17,:1
18A self-power photodetector based on controlled growth of single crystal MAPbBr_(3)/WO_(3) heterojunction显示文摘Compared with polycrystalline films, perovskite single crystal is considered as a promising photoelectric material due to its unique advantages in quantum efficiency and carrier diffusion length. In this work, the micron-thickness MAPbBr_(3) single crystal was prepared through a highly repeatable process based on the crystal seed dissolution-growth method. A heterojunction of MAPbBr_(3)/WO_(3) single crystal was realized through a simple thermal evaporation process, and the integrated C/MAPbBr_(3)/WO_(3)/C device demonstrated self-powered characteristics and high photoelectric performance, which showed good responsivity of about 111 mA/W, detectivity of 9.64×10^(11) Jones and fast response speed(0.11/0.56 ms). Meanwhile, the device exhibited good rectification performance(ratio of 125 at ±2 V) and reduced dark current due to the built-in electric field formed in the heterojunction. This study provides a facile, flexible, and highly repeatable method for the preparation of high-performance photodetectors based on MAPbBr_(3) single crystals with micrometer thickness.YAO JianFeng ZHANG Hu LU JunZheng YANG LiangPan LIU DuanWangDe HU YaLi ZENG Wei GUI PengBin CHEN ZhiLiang REN XinGang 2023Science China(Technological Sciences)2023,66,9:0
19Systematic review and Meta-analysis of acupuncture and acupoint catgut embedding for the treatment of abdominal obesity显示文摘OBJECTIVE:To systematically review and analyze the effect of acupuncture and acupoint catgut embedding in treatment of abdominal obesity to provide a more reasonable clinical treatment regimen.METHODS:Ten databases were searched as of August 2022:the English databases Pub Med,Embase,Cochrane Library,Web of Science,Wiley,and Scopus and the Chinese databases China National Knowledge Infrastructure Database,China Science and Technology Journal Database,Wanfang,and Sino Med/Chinese Biomedical Literature Database.Randomized controlled trials(RCTs)of acupuncture and acupoint catgut embedding as the main interventions to treat abdominal obesity were extracted.The investigators imported the citations into End Note version X9.1 for deduplication,screening,extraction,and integration.The risk of bias in the included RCTs was assessed according to the Cochrane Handbook.Rev Man 5.4 software was used to conduct a Meta-analysis of RCTs that met the inclusion criteria.RESULTS:Thirteen RCTs(1069 patients)were included in this study,and the data of eleven RCTs(966 patients)were include in the Meta-analysis.The results showed that acupoint catgut embedding can significantly change the weight and waist circumference of patients with abdominal obesity when compared to sham acupuncture or no treatment[mean difference(MD)=2.32,95%confidence interval(CI)(1.88,2.76),P<0.00001],[MD=3.47,95%CI(1.99,4.94),P<0.00001].The change in hip circumference after acupuncture was also significant[MD=0.89,95%CI(0.12,1.66),P=0.02].CONCLUSION:This study found that acupuncture and acupoint catgut embedding can effectively treat abdominal obesity,therefore,these interventions can be used as clinical supplements and alternative therapies.The diagnostic criteria of the existing studies and the intervention measures of the control group are not unified.It will be necessary to improve the clinical study protocols and expand the sample size to further validate the reliability of the results obtained of this study.YE Wujie XING Jingyu YU Zekai HU Xingang ZHAO Yan 2022Journal of Traditional Chinese Medicine2022,42,6:0
20‘Aerosol optical properties under different pollution levels in the pearl river delta(PRD)region of China’J.Environ.Sci.87(2020)49–59显示文摘The authors regretLiuwei Kong Min Hu Qinwen Tan Miao Feng Yu Qu Junling An Yuanhang Zhang Xingang Liu Nianliang Cheng 2021Journal of Environmental Sciences2021,33,6:0
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