维普中文期刊产品整合服务
227篇 您的检索式:作者名="Suqin"
    题名 作者 年代 出处 被引量
1Evolution of planetary boundary layer under different weather conditions,and its impact on aerosol concentrations显示文摘一个领域实验在天津被进行,从 2010 年 9 月 930 日的中国,在表面空气污染物质上集中了于行星的边界层(PBL ) 和它的影响的进化。实验使用了三台遥感仪器,风侧面雷达( WPR ),微波辐射计( MWR )和微脉搏的激光雷达( MPL ),到检测风,温度,和喷雾器 backscattering 系数并且到的垂直侧面测量表面污染物质的垂直侧面(喷雾器,公司, SO2 , NOx ),并且也从 255-m 收集了声音的风速表数据气象学的塔。把大小基于这些, PBL 的进化被估计。平均 PBL 高度在夜间期间在 noon/afternoon-time,和 200300 m 期间是大约 10001300 m。PBL 高度和喷雾器集中是相关反的在期间清楚并且薄雾条件。当平均喷雾器集中分别地是在薄雾和晴朗天空条件下面的 52 和 17 g/m3 时,平均最大的 PBL 高度是 1.08 和 1.70 km。太阳的放射上的喷雾器和云的影响基于从 255-m 收集的声音的风速表数据被观察气象学的塔。当 PBL 的镇压结构进一步削弱了污染物质的散开时,热流动被发现被薄雾(重污染) 或云显著地减少了,它趋于压抑 PBL 的发展,导致重污染。这个可能的积极反馈周期(更多的喷雾器降低 PBL 高度更多的喷雾器) 将在大城市为重地面污染导致一个加速过程。Jiannong Quan Yang Gao Qiang Zhang Xuexi Tie Junji Cao Suqin Han Junwang Meng Pengfei Chen Delong Zhao 2013Particuology2013,11,1:51
2Characterization and Source Apportionment of Volatile Organic Compounds in Urban and Suburban Tianjin, China显示文摘Tianjin is the third largest megacity and the fastest growth area in China, and consequently faces the problems of surface ozone and haze episodes. This study measures and characterizes volatile organic compounds(VOCs), which are ozone precursors, to identify their possible sources and evaluate their contribution to ozone formation in urban and suburban Tianjin,China during the Ha Chi(Haze in China) summer campaign in 2009. A total of 107 species of ambient VOCs were detected,and the average concentrations of VOCs at urban and suburban sites were 92 and 174 ppbv, respectively. Of those, 51 species of VOCs were extracted to analyze the possible VOC sources using positive matrix factorization. The identified sources of VOCs were significantly related to vehicular activities, which specifically contributed 60% to urban and 42% to suburban VOCs loadings in Tianjin. Industrial emission was the second most prominent source of ambient VOCs in both urban and suburban areas, although the contribution of industry in the suburban area(36%) was much higher than that at the urban area(16%). We conclude that controlling vehicle emissions should be a top priority for VOC reduction, and that fast industrialization and urbanization causes air pollution to be more complex due to the combined emission of VOCs from industry and daily life, especially in suburban areas.HAN Meng LU Xueqiang ZHAO Chunsheng RAN Liang HAN Suqin 2015Advances in Atmospheric Sciences2015,32,3:16
3Dual Functions of Phospholipase Dα1 in Plant Response to Drought显示文摘Phospholipase D1 (PLD1 ) 被显示了调停有气孔的运动的 abscisic 酸规定。而 PLD1-overexpressing 烟草减少了,在 PLD1 缺乏的 Arabidopsis 植物增加了, transpirational 水损失。在干旱的早阶段,在水损失的减少与快速的有气孔的闭合在 PLD1-overexpressing 植物由 PLD 的高水平引起了被联系。在干旱的迟了的阶段,然而, overexpressing 植物比控制植物显示了更多的危险性到干旱。在 overexpressing 植物的 PLD1 活动比干旱也在 PLD1 活动在导致了增加的控制植物的高得多。PLD1 活动的高水平在干旱的迟了的阶段被相关到膜降级,由离子的漏和类脂化合物 peroxidation 示威了。这些调查结果显示 PLD1 表示的高水平有植物反应上的不同效果浇赤字。它在更早的阶段支持有气孔的闭合,但是在延长干旱应力破坏膜。这些调查结果在与 PLD 功能和潜在的应用的理解的关系被讨论。Yueyun Hong Suqin Zheng Xuemin Wang 2008Molecular Plant2008,1,2:12
4Isolation,purification and characterization of secondary structure of antifreeze protein from Ammopiptanthus mongo-licus显示文摘Antifreeze protein (AFP) from Ammopiptanthus mongolicus leaves was isolated and purified with DEAE cellulose 52, Sephacryl 300, heat treatment and preparative isotachophoresis. The molecular weight of AFP was 50 ku by SDS-PAGE measurement. The average thermal hysteresis activity (THA) of AFP was 0.35℃ at 5 mg/mL using a differential scanning calorimeter (DSC). This AFP showed heated stability. From circular dichroism (CD) of AFP spectral data from 195-240 nm, a well-defined secondary structure of 11% a-helix, 34% antiparallel β-sheet and 55% random coil for the plant AFP was deduced.FEI Yunbiao WEI Lingbo GAO Suqin LU Manchun WANG Baohuai LI Zhifen ZHANG Youming SHU Nianhong JIANG Yong WANG Weixiang 2001Chinese Science Bulletin2001,46,6:8
5An Investigation of Optimal Machine Learning Methods for the Prediction of ROTI显示文摘The rate of the total electron content(TEC)change index(ROTI)can be regarded as an effective indicator of the level of ionospheric scintillation,in particular in low and high latitude regions.An accurate prediction of the ROTI is essential to reduce the impact of the ionospheric scintillation on earth observation systems,such as the global navigation satellite systems.However,it is difficult to predict the ROTI with high accuracy because of the complexity of the ionosphere.In this study,advanced machine learning methods have been investigated for ROTI prediction over a station at high-latitude in Canada.These methods are used to predict the ROTI in the next 5 minutes using the data derived from the past 15 minutes at the same location.Experimental results show that the method of the bidirectional gated recurrent unit network(BGRU)outperforms the other six approaches tested in the research.It is also confirmed that the RMSEs of the predicted ROTI using the BGRU method in all four seasons of 2017 are less than 0.05 TECU/min.It is demonstrated that the BGRU method exhibits a high level of robustness in dealing with abrupt solar activities.Fulong XU Zishen LI Kefei ZHANG Ningbo WANG Suqin WU Andong HU Lucas Holden 2020Journal of Geodesy and Geoinformation Science2020,3,2:7
6Long-term trends in fog and boundary layer characteristics in Tianjin,China显示文摘Long-term trends in fog episodes,vertical variations of atmospheric boundary structure,and air pollutant concentrations during two different heavy fog events in the Tianjin area were analyzed.The total amount of fog has increased since 1980 due to the stability of the boundary layer and an increase of pollutant emissions.The variation in the characteristics of the boundary layer and air pollutant concentrations were significantly different between the two fog processes(fog 1 and fog II).The onset of fog I was accompanied by a temperature inversion in the low atmosphere,and the average kinetic energy showed a clear diurnal trend and vertical variation,which increased with height.The dissipation of fog I was mainly due to turbulence.However,the atmospheric stratification was not stable in the lower layer before the onset of fog II.The diurnal and vertical changes in kinetic energy were very small,in which turbulent momentum at each measurement height tended to be zero.In the dissipation process of fog II,wind speed increased significantly.Surface PM_(2.)5 concentrations decreased,but the ratio of PM_(2.5) to PM_(10)increased from 0.66 to 0.82 until fog I dissipated.However,the concentration of PM2.5 did not decrease at the early stage of fog II,but the ratio of PM_(2.5) to PM_(10) PM_(2.5)/PM_(10) decreased to 0.21 when fog II dissipated.This study showed that there was a clear difference in the evolution of pollutant concentration for different pollutants and in different developing stages during the fog events.PM2.5 concentration accumulated faster than those of SO_2 and NO_x,and the PM_(2.5) cumulative rate was greater in the mid-term of the fog process.Suqin Han Ziying Cai Yufen Zhang Jiao Wang Qing Yao Peiyan Li Xiangjin Li 2015Particuology2015,13,3:7
7Autophagy promotes BCG-induced maturation of human dendritic cells显示文摘树枝状的房间(DC ) 为对 Mycobacterium 肺结核的适应有免疫力的反应的开始是重要的。Autophagy 是天生、适应的防卫机制并且为 M 的控制重要。肺结核。然而,在对 M 的适应有免疫力的反应的 autophagy 的角色。肺结核遗体将坚定。在现在的学习,我们在感染杆菌 CalmetteGu 楨?敭獡牵獥?污湯?楷桴愠潮桴牥?瀠敲楶畯汳?湵敲潰瑲摥?敗爠灥楬慣整渠湩?敧潮敭眭摩?楳湧晩捩湡?獡潳楣瑡潩獮眠瑩?湫睯?潬楣漠?汰獡慭挠潨敬瑳牥汯?楨桧搭湥楳祴氠灩灯潲整湩?潬?敤獮瑩?楬潰牰瑯楥?琠楲汧'贍澳Κ?桴特楯?瑳浩汵瑡湩?潨浲湯?栠浯'耀G整湩?的 DC 的成熟上学习了 autophagy 的效果?爭慥瑣癩?牰瑯楥?湡?牵捩愠楣?眠瑩?湯祬漠敮搠瑥'陶?湩琠敨瀠敲楶畯?湡污獹獩漠?桴?慳敭琠慲瑩??牵桴牥?敷氠癥牥条摥猠慨敲?摩湥楴祴戭?敤'諟?敧敮楴?...Yan Min Wenxi Xu Dan Liu Suqin Shen Yunzhi Lu Lu Zhang HonghaiWang 2010Acta Biochimica et Biophysica Sinica2010,42,3:7
8Nitrogen-doped graphene nanosheets as high efficient catalysts for oxygen reduction reaction显示文摘It is of great significance in exploring alternative catalysts to platinum (Pt)-based materials for oxygen reduction reaction (ORR),because this reaction is invariably involved in various fuel cells and metal-air batteries.We herein reported the nitrogen doped graphene nanosheets (NGNSs) with pore volume of as high as 3.42 m 3 /g and investigated their potential application as ORR catalysts,it was demonstrated the NGNSs featured high activity,improved kinetics and excellent long-term stability for ORR.The NGNSs were successfully used as cathode catalysts of microbial fuel cells (MFCs) and performed even better than the commercial Pt/C (Pt 10%) catalysts at the maximum power output.CI SuQin WU YongMin ZOU JianPing TANG LongHua LUO ShengLian LI JingHong WEN ZhenHai 2012Chinese Science Bulletin2012,57,23:7
9Realization of an Optimal Dynamic Geodetic Reference Frame in China:Methodology and Applications显示文摘China Geodetic Coordinate System 2000(CGCS2000)has been used for several years as a formal published reference frame.The coordinates of all global navigation satellite system(GNSS)stations in China need to be corrected to align with the CGCS2000 frame.Different strategies can be adopted for the realization of an optimal reference frame.However,different strategies lead to different results,with differences as great as several decimeters when GNSS station coordinates are transformed into CGCS2000-defined coordinates.The two common methods for the coordinate correction of a GNSS station are quasi-stable adjustment under CGCS2000 and plate movement correction,and the differences between their results can be greater than 10 cm.In this study,a statistic method called'supervised clustering'is applied to the selection of GNSS reference stations;a new scheme named'partition spacing'for the grouping of all processed GNSS stations is proposed;and the plate movement correction method is used to correct the coordinates of all GNSS stations from the GNSS epoch to the CGCS2000 epoch.The results from the new partitioning method were found to be significantly better than those from the conventional station-blocking approach.When coordinates from the stations without grouping were used as the standard,the accuracy of all the three-dimensional coordinate components from the new partitioning method was better than 2 mm.The root mean squares(RMSs)of the velocities in the x,y,and z directions resulting from the supervised clustering method were 0.19,0.45,and 0.32 mm∙a1,respectively,which were much smaller than the values of 0.92,0.72,and 0.97 mm∙a1 that resulted from the conventional approach.In addition,singular spectrum analysis(SSA)was used to model and predict the position nonlinear movements.The modeling accuracies of SSA were better than 3,2,and 5 mm in the east(E),north(N),and up(U)directions,respectively;and its prediction accuracies were better than 5 mm and 1 cm for the horizontal and vertical domains,respectively.Pengfei Cheng Yingyan Cheng Xiaoming Wang Suqin Wu Yantian Xu 2020Engineering2020,6,8:5
10Experimental investigation of ghost imaging of reflective objects with different surface roughness显示文摘We present an experimental demonstration of ghost imaging of reflective objects with different surface roughness.The influence of the surface roughness, the transverse size of the test detector, and the reflective angle on the signal-to-noise ratio(SNR) is analyzed by measuring the second-order correlation of the light field based on classical statistical optics. It is shown that the SNR decreases with an increment of the surface roughness and the detector's transverse size or a decrease of the reflective angle. Additionally, the comparative studies between the rough object and the smooth one under the same conditions are also discussed.SUQIN NAN YANFENG BAI XIAOHUI SHI QIAN SHEN LIJIE QU HENGXING LI XIQUAN FU 2017Photonics Research2017,5,4:5
11Vertical characteristics and source identification of PM_(10) in Tianjin显示文摘Ambient PM 10 (particulate matter with a diameter less than 10μm) concentrations were measured on a 255 meter tower in Tianjin,China.The samples were collected at four vertical levels (10,40,120 and 220 m).Vertical characteristics for PM 10 samples were studied.The results showed that the concentrations of PM 10 and constituent species had a negative correlation with the sampling height.The highest concentrations of PM 10 and species were obtained at the 10 m level,and the lowest concentrations were measured at the 220 m level.For the fractions of species to total mass,SO 4 2- and NO 3- had higher values (fraction) at greater height;while Ca had a higher fraction at lower height.Possible source categories for the PM 10 ambient dataset were identified by the principal component analysis method.The possible source categories included crustal dust,vehicles,cement dust,and incineration as well as secondary sulfate and nitrate sources.Analysis of meteorological factors on PM 10 concentrations indicated that wind speed and inversion may be the main factors contributing to different concentrations of PM 10 at different heights.Zhimei Xiao Jianhui Wu Suqin Han Yufen Zhang Hong Xu Xiaoyong Zhang Guoliang Shi Yinchang Feng 2012Journal of Environmental Sciences2012,24,1:5
12Synthesis and properties of p(NIPA-co-NVP)/clay hydrogels by radiation polymerization显示文摘In this study,hydrogels of P(NIPA-co-NVP)/clay were synthesized byγ-ray radiation.Different thermo-sensitive hydrogels were made under different experimental conditions such as dose,monomer ratio,and con- tent of clay.X-ray diffraction shows that the layer distance between Na-clays is changed from 1.6 to 2.7 nm because Na-clay pieces can be intercalated or exfoliated by HTMAB,and that between P(NIPA-co-NVP)/clay pieces is 3.4 nm. The swelling property tests show that the LCST of P(NIPA-co-NVP) is higher than PNIPA.With the increase of NVP content,LCST is higher.As the ratio of NIPA/NVP is 95/5,hydrogel shows the best swelling property and LCST is 37℃.LCST of P(NIPA-co-NVP)/clay hydrogel is not changed,but the strength and swelling properties are better.SONG Hongyan YANG Mingcheng ZHU Chengshen HE Suqin GAO Ya 2007Nuclear Science and Techniques2007,18,1:4
13Abnormal Brain Structure and Function in First-Episode Childhood- and Adolescence-Onset Schizophrenia: Association with Clinical Symptoms显示文摘Dear Editor,Schizophrenia is one of the most complicated and serious psychiatric disorders, and patients often show markedly disrupted structural and functional abnormalities during resting-state imaging scans of the brain. Patients with firstepisode childhood- and adolescence-onset schizophrenia (CAOS) refers to individuals under the age of 18 years whose first episode of illness had occurred before they were 13 years old [1]. The symptoms are similar to adultonset schizophrenia-auditory hallucinations or language deficits and abnormal cognition. However, CAOS patients often present with more severe psychotic symptoms and have a worse prognosis and treatment effect [2].Yanhong Xia Dan Lv Yinghui Liang Haisan Zhang Keyang Pei Rongrong Shao Yali Li Yan Zhang Yuling Li Jinghua Guo Luxian Lv Suqin Guo 2019Neuroscience Bulletin2019,35,3:4
14RATIONAL SPECTRAL COLLOCATION METHOD FOR A COUPLED SYSTEM OF SINGULARLY PERTURBED BOUNDARY VALUE PROBLEMS显示文摘为不可思议地使不安的线性方程的 a coupled 系统的一个新奇搭配方法被介绍。这个方法基于合理光谱在有 sinh 的 barycentric 形式的搭配方法变换。由 sinh 变换,原来的 Chebyshev 点被印射进在答案的单个点附近聚类的转变的。从关于奇特答案的 asymptotic 分析的结果被采用在这 sinh 变换决定参数。数字实验被执行表明我们的方法的高精确性和效率。[从作者抽象]Suqin Chen Yingwei Wang Xionghua Wu 2011Journal of Computational Mathematics2011,29,4:4
15Highlights and new Editorial Advisory Board members of the Journal of Environmental Sciences显示文摘The Journal of Environmental Sciences(JES)is honored to welcome Professors/Drs William A.Mitch,Jiuhui Qu,Susan D.Richardson,Jerald L.Schnoor,Hongxiao Tang,Shu Tao,and Hugh A.Tilson to serve on the Editorial Advisory Board(EAB).Their tremendous experience in scientific publications,leading expertise in topic areas pertinent to JES,diverse international networks/perspectives,and exemplary dedication to scientific excellence will guide and help the continuing healthy growth of JES.Qingcai Feng Suqin Liu Zhengang Mao Jian Xu Zixuan Wang X.Chris Le 2016Journal of Environmental Sciences2016,28,9:4
16Low-overpotential selective reduction of CO2 to ethanol on electrodeposited CuxAuy nanowire arrays显示文摘Direct electrochemical reduction of CO2 to multicarbon products is highly desirable, yet challenging. Here, we present a potentiostatic pulse-electrodeposition of high-aspect-ratio CuxAuy nanowire arrays (NWAs) as high-performance electrocatalysts for the CO2 reduction reaction (CO2RR). The surface electronic structure related to the Cu:Au ratio in the CuxAuy NWAs could be facilely modulated by controlling the electrodeposition potential and the as-fabricated CuxAuy NWAs could be directly used as the catalytic electrode for the CO2RR. The morphology of the high-aspect-ratio nanowire array significantly lowers the onset potential of the alcohol formation due to the diffusion-induced enhancement of the local pH and CO concentration near the nanowire surface. Besides, the properly adjusted surface electronic structure of the CuxAuy NWA enables the adsorption of CO and facilitates the subsequent CO reduction to ethanol via the C-C coupling pathway. Owing to the synergistic effect of morphology and electronic structure, the optimized CuxAuy NWA selectively reduces CO2 to ethanol at low potentials of -0.5——0.7 V vs. RHE with a highest Faradaic efficiency of 48%. This work demonstrates the feasibility to optimize the activity and selectivity of the Cu-based electrocatalysts toward multicarbon alcohols for the CO2RR via simultaneous adjustment of the electronic structure and morphology of the catalysts.Weiwei Zhu Kuangmin Zhao Suqin Liu Min Liu Feng Peng Pengda An Binhao Qin Huimin Zhou Hongmei Li Zhen He 2019Journal of Energy Chemistry2019,28,10:4
17Vehicle tracking by detection in UAV aerial video显示文摘With the maturity and popularity of UAV(un-manned aerial vehicle)technology [1-3],UAV video is becoming an effective supplement to the fixed monitoring video [4,5].In the aspect of traffic information acquisition,the advantages of UAV are obvious.UAV can fly not only between the buildings,but also on the freeway,and even into the tunnel,showing the unique flexibility and maneuverability.Shaohua LIU Suqin WANG Wenhao SHI Haibo LIU Zhaoxin LI Tianlu MAO 2019Science China(Information Sciences)2019,62,2:4
18Swelling and thermal properties of porous PNIPAM/PEG hydrogels prepared by radiation polymerization显示文摘In this study,a series of porous intelligent hydrogels were synthesized by radiation exhibiting the lower critical solution temperature(LCST) and fast response involving a combination of A’-isopropyl acrylamideas monomer, polyethylene glycol(PEG) as pore-forming agent and N,N-methylene-bis-acrylamide as crosslinking agent.The hydrogels were analyzed by Fourier transform infrared spectroscopy,and the influence of radiation doses on their swelling and thermal behaviors were studied.Their surface morphologies were examined by scanning electron microscopy.The results showed that PEG molecules only acted as pore-forming agent in the cross-linked polymerization.Their swelling ratios reduced with increasing radiation doses.The LCST was around 37℃,and varied little with the radiation doses.The frozen water content of PNIPAM/PEG6000 hydrogel reduced with increasing the radiation dose,and was greater than that of PN1PAM hydrogel at 15 kGy.Hydrogel macropores were prepared by PEG agent,and the hydrogels without PEG had a dense surface.The porous hydrogels are expected to be applied in the field of artificial intelligence material.LI Zhihui LIU Wentao LI Zhongyuan YANG Mingcheng GAO Xujing CUI Haitao HE Suqin ZHU Chengshen 2013Nuclear Science and Techniques2013,24,2:3
19CHANGES IN CHINA’S WAGE STRUCTURE显示文摘Suqin Ge Dennis Tao Yang 2014Journal of the European Economic Association2014,,2:3
20Preparation and electrochemical performance of spherical Fe_3O_4 as anode materials for Li-ion batteries显示文摘Fe3O4 nano-powder was prepared by the hydrothermal method. The structure and morphology of the product were characterized by X-ray diffraction (XRD) and scanning electronic microscopy (SEM). The as-prepared powder has regularly spherical morphology, and the average size of product is about 25 nm. The possible application use of this material as the active mass of anode for rechargeable Li batteries was examined by cyclic voltammeter (CV), galvanostatic charge/discharge.The experimental results showed that this material exhibited large specific capacity at the first cycle, and the discharge and charge capacity retention of this electrode are 37.04% and 48.76%, respectively. Furthermore, the impedance change of Fe3O4 electrode under different cycle number and potential was examined.WANG FangBin, CHEN Jie, HUANG KeLong & LIU SuQin College of Chemistry & Chemical Engineering, Central South University, Changsha 410083, China 2009Science China(Technological Sciences)2009,52,11:3
返回顶部 每页显示:
共12页 首页 上一页 第1页 下一页 末页 /12 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费