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264篇 您的检索式:作者名="Jianqiang Wang"
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1Aggregation operators on intuitionistic trapezoidal fuzzy number and its application to multi-criteria decision making problems显示文摘Intuitionistic trapezoidal fuzzy numbers and their operational laws are defined. Based on these operational laws, some aggregation operators, including intuitionistic trapezoidal fuzzy weighted arithmetic averaging operator and weighted geometric averaging operator are proposed. Expected values, score function, and accuracy function of intuitionitsic trapezoidal fuzzy numbers are defined. Based on these, a kind of intuitionistic trapezoidal fuzzy multi-criteria decision making method is proposed. By using these aggregation operators, criteria values are aggregated and integrated intuitionistic trapezoidal fuzzy numbers of alternatives are attained. By comparing score function and accuracy function values of integrated fuzzy numbers, a ranking of the whole alternative set can be attained. An example is given to show the feasibility and availability of the method.Wang Jianqiang Zhang Zhong 2009Journal of Systems Engineering and Electronics2009,20,2:63
2High-entropy ceramics:Present status,challenges,and a look forward显示文摘High-entropy ceramics (HECs) are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near-equal atomic ratios of multi-principal elements.Although in the infant stage,the emerging of this new family of materials has brought new opportunities for material design and property tailoring.Distinct from metals,the diversity in crystal structure and electronic structure of ceramics provides huge space for properties tuning through band structure engineering and phonon engineering.Aside from strengthening,hardening,and low thermal conductivity that have already been found in high-entropy alloys,new properties like colossal dielectric constant,super ionic conductivity,severe anisotropic thermal expansion coefficient,strong electromagnetic wave absorption,etc.,have been discovered in HECs.As a response to the rapid development in this nascent field,this article gives a comprehensive review on the structure features,theoretical methods for stability and property prediction,processing routes,novel properties,and prospective applications of HECs.The challenges on processing,characterization,and property predictions are also emphasized.Finally,future directions for new material exploration,novel processing,fundamental understanding,in-depth characterization,and database assessments are given.Huimin XIANG Yan XING Fu-zhi DAI Hongjie WANG Lei SU Lei MIAO Guojun ZHANG Yiguang WANG Xiwei QI Lei YAO Hailong WANG Biao ZHAO Jianqiang LI Yanchun ZHOU 2021Journal of Advanced Ceramics2021,10,3:28
3Temporo-spatial Coordinates of Evolution of the Ordos Basin and Its Mineralization Responses显示文摘摘要:Ordos 盆被开发从中间迟了对早白垩纪三叠纪,然后自从迟了的白垩纪,进入了它的以后的改革时期。它的主要身体忍受 intra-cratonic 盆的特征。盆也属于在大规模盆上重叠了的多迭加的盆早并且晚古生代。当前, Ordos 盆成为了剩余盆各种各样的式样的富有经验的改革自从迟了的白垩纪。它建议了有在盆的进化期间存在的构造变丑的至少四个明显的阶段,把进化和沉积划分成四个阶段。优先二个阶段具有最繁荣,在哪个期间湖盆是宽广的,免职范围多于比当前的剩余盆两次大,导致主要含有石油、忍受煤的阶层。二个阶段被分开由地区性高举在区域的变化。在 Yan'an 阶段的结束, depositional 打断和侵蚀正在持续时间的一个短时期。第三是中间 -- 侏罗记并且 Zhiluo 舞台,沉积程度仍然在是宽广的但是湖区域显然被减少。在迟了的侏罗记构造变丑是集中的。当不同厚度的集团企业在东方方面的 foredeep 以内被积累时,一条戳越过水坝落下的水带在盆的西方的边缘上被形成。盆的中央、东方的部分服从于侵蚀和改革。一个地区性的框架与在西方在东方和消沉高举黄河向西在区域形成了。在早白垩纪,沉积广泛地被散布, unconformably 重叠北、南部的边阶上的以前的西方的边缘戳带和山脉。象在 Ordos 盆形成的油,天然气,煤和铀存款那样有丰富的精力资源。产生的主要阶段,矿化作用并且资源有明显的反应的多重精力放在 Ordos 中生代和新生代进化和改革与那些联合关系的连接和结束盆。LIU Chiyang ZHAO Hongge ZHAO Junfeng WANG Jianqiang ZHANG Dongdong YANG Minghui 2008Acta Geologica Sinica(English Edition)2008,82,6:20
4Composites of small Ag clusters confined in the channels of well-ordered mesoporous anatase TiO2 and their excellent solar-light-driven photocatalytic performance显示文摘Wei Zhou Ting Li Jianqiang Wang Yang Qu Kai Pan Ying Xie Guohui Tian Lei Wang Zhiyu Ren Baojiang Jiang Honggang Fu 2014Nano Research2014,7,5:17
5Thiolactone copolymer donor gifts organic solar cells a 16.72% efficiency显示文摘Since 1995,bulk-heterojunction organic solar cells consisting of one or two organic donors and one or two organic acceptors have been fighting for high power conversion efficiencies(PCEs)and good stability[1].Until recent years,this next-generation photovoltaic technology starts to offer decent PCEs,shedding the light on commercialization,and attracting great attention again[2-14].Compared w让h the continuously emerging highperformance nonfullerene acceptors,high-performance donors are rare.Ji Xiong Ke Jin Yufan Jiang Jianqiang Qin Tan Wang Jinfeng Liu Qishi Liu Haili Peng Xiongfeng Li Anxin Sun Xianyi Meng Lixiu Zhang Ling Liu Wenting Li Zhimin Fang Xue Jia Zuo Xiao Yaqing Feng Xiaotao Zhang Kuan Sun Shangfeng Yang Shengwei Shi Liming Ding 2019Science Bulletin2019,64,21:17
6Effect of active oxygen on the performance of Pt/CeO2 catalysts for CO oxidation显示文摘This study was focused on the influence of active oxygen on the performance of Pt/CeO_2 catalysts for CO oxidation. A series of CeO_2 supports with different contents of active oxygen were obtained by adding surfactant at different synthesis steps. 0.25 wt% Pt was loaded on these CeO_2 supports by incipientwetness impregnation methods. The catalysts were characterized by N2 adsorption, X-ray diffraction(XRD), high-resolution transmission electron microscopy(HRTEM), H_2 temperature-programmed reduction(H_2-TPR), dynamic oxygen storage capacity(DOSC) and in-situ DRIFTS technologies. For S-f supports, the surfactant was added into the solution before spray-drying in the synthesis process, which facilitates more active oxygen formation on the surface of CeO_2. After loading Pt, the more active oxygen on CeO_2 contributes to dispersing Pt species and enhancing the CO oxidation activity. As for the aged samples,Pt-R-h shows the highest activity above 190 ℃ because of the presence of more partly oxidized Pt^(δ+) species. Thus the activity is also influenced by the states of Pt and the Pt^(δ+) species may contribute to the high activity at elevated temperature.Anbin Zhou Jun Wang Hui Wang Hang Li Jianqiang Wang Meiqing Shen 2018Journal of Rare Earths2018,36,3:16
7DESIGN AND CONTROL OF AN ULTRAPRECISION STAGE USED IN GRATING TILING显示文摘In petawatt laser system, the gratings used to compose pulse compressor are very large in size which can be only acquired currently by arraying small aperture gratings to form a large one instead, an approach referred to as grating tiling. Theory and experiments have demonstrated that the coherent addition of multiple small gratings to form a larger grating is viable, the key technology of which is to control the relative position and orientation of each grating with high precision. According to the main factors that affect the performance of the grating tiling, a 5-DOF ultraprecision stage is developed for the grating tiling experiment. The mechanism is formed by serial structures. The motion of the mechanism is guided by flexure hinges and driven by piezoelectric actuators and the movement resolution of which can achieve nanometer level. To keep the stability of the mechanism, capacitive position sensors with nanometer accuracy are fixed on it to provide feedback signals with which to realize closed-loop control, thus the positioning precision of the mechanism is within several nanometers range through voltage control and digital PID algorithm. Results of experiments indicate that the performance of the mechanism can meet the requirement of precision for grating tiling.WANG Yong LIU Zhigang BO Feng ZHU Jianqiang 2007Chinese Journal of Mechanical Engineering2007,20,1:13
8Surface tension of molten Al-Si alloy at temperatures ranging from 923 to 1123 K显示文摘The surface tension of molten AlSi20 alloy has been measured by using the sessile drop method at 923―1123 K under argon atmosphere in both heating-up and cooling processes. The result shows that the surface tension of this alloy decreases as long as temperature increases. The results of surface tension and contact angles in heating-up process have differences from those obtained in cooling process, because the metal microstructures have some changes at different temperatures based on the metal genetic theory. The surface tension of molten AlSi20 alloy and that of molten pure aluminum have been compared as well, and the temperature coefficient of AlSi20 alloy is slightly lower than that of Al. The result has been analyzed by the linear scanning analysis with ESEM. The concentration of silicon in most region of the bulk is lower than that of the surface and the addition of Si to pure Al decreases the surface tension of molten pure Al.DOU Lei YUAN ZhangFu LI JianQiang LI Jing WANG XiaoQiang 2008Chinese Science Bulletin2008,53,17:12
9Combined treatment with erythropoietin and granulocyte colony-stimulating factor enhances neovascularization and improves cardiac function after myocardial infarction显示文摘Xue Jingyi Du Guoqing Shi Jing Li Yue Masahiro Yasutake Liu Lei Li Jianqiang Kong Yihui Wang Shuxian Yun Fengxiang Li Weimin 2014Chinese Medical Journal2014,,9:12
10Study of heavy metal speciation in branch sediments of Poyang Lake显示文摘这研究在波伊昂·莱克,的六个分支专注于沉积的公害水平在中国的最大的淡水湖。这在湖的六个分支是重金属(Cu,公司, Cd, Pb,和 Ni ) 的种形成分析上的第一份系统的报告。包含五步的顺序的抽取的一个报导分析过程被用于 particulating 重金属的分区。沉积样品用火焰被分析原子吸收光谱学(FAAS ) 。从五获得的试验性的结果在点表明了的采样复制河的底部表面沉积的样品顺序的抽取过程的相对标准差通常比 10% 好(Cd 除了) 。五个元素的平均提取内容,不管怎么说分析了五步,被发现是(mg/kg ) 为 Cu:26.89,公司:16.25, Cd:1.08, Pb:37.98,并且 Ni:20.46。可交换的种类的内容通常更低。除了 Cu,到有机物的种类契约的百分比比 20% 低。为 Cu,公司,和 Ni 包含大多数金属的部分是残余(52.26% , 45.28% ,和 74.82% ,分别地) 。LUO Mingbiao LI Jianqiang CAO Weipeng WANG Maolan 2008Journal of Environmental Sciences2008,20,2:11
11Effects of Na+on Cu/SAPO-34 for ammonia selective catalytic reduction显示文摘Copper-exchanged chabazite(Cu/CHA) catalysts have been found to be affected by alkali metal and alkaline earth ions. However, the effects of Na^+ ions on Cu/SAPO-34 for ammonia selective catalytic reduction(NH_3-SCR) are still unclear. In order to investigate the mechanism, five samples with various Na contents were synthesized and characterized. It was observed that the introduced Na^+ ion-exchanges with H+and Cu^(2+)of Cu/SAPO-34. The exchange of H+is easier than that of isolated Cu^(2+). The exchanged Cu^(2+)ions aggregate and form 'CuAl_2O_4-like' species.The NH_3-SCR activity of Cu/SAPO-34 decreases with increasing Na content, and the loss of isolated Cu^(2+)and acid sites is responsible for the activity loss.Can Wang Chen Wang Jun Wang Jianqiang Wang Meiqing Shen Wei Li 2018Journal of Environmental Sciences2018,30,8:10
12Basical characteristics of fluid geologic process of interlayer oxidation zone sandstone-typeuranium deposit显示文摘This paper reveals the physicochemical properties such as component, formulation, genesis, tem- perature, pH, Eh, salinity and pressure of all main alteration fluid of interlayer oxidation zone sand- stone-type uranium deposits after studying the geologic process and geochemistry of internal typical sandstone-type uranium deposits such as Shihongtan deposit in the Turpan-Hami basin, 512 deposit in the Yili basin, Dongsheng deposit in the Ordos basin. The composition of fluid can be divided into two parts based on the analysis of inclusion: one can be affirmed as atmospheric water with ordinary temperature epigenesist according to the character of hydrogen and oxygen isotope of inclusion, the other is natural gas containing gaseous hydrocarbon like CH4, and CO2 as well as a little H2S, CO, H2, N2 and so on, it always contains a small quantity of hydrocarbon liquid in petroliferous basins. The fluid property of oxidation alteration zone is always oxidation alkaline, and neutrality or weak acid-weak alkaline and reducibility during the metallizing process, but at secondary reduction or deoxidization zone it becomes strong reduction alkaline. Oxygenic groundwater in the fluid is the activate and mig- ratory medium of uranium element, but the gaseous hydrocarbon like CH4 as well as H2, H2S, CO from natural gas is the important sedimentary reducer of uranium mineral; the transformation of pH,Eh in fluid environment is the main reason for the formation of uranium metallization.WU BoLin LIU ChiYang WANG JianQiang 2007Science China Earth Sciences2007,50,z2:9
13Status and development of high-power laser facilities at the NLHPLP显示文摘In this paper, we review the status of the multifunctional experimental platform at the National Laboratory of High Power Laser and Physics(NLHPLP). The platform, including the SG-II laser facility, SG-II 9th beam, SG-II upgrade(SG-II UP) facility, and SG-II 5 PW facility, is operational and available for interested scientists studying inertial confinement fusion(ICF) and a broad range of high-energy-density physics. These facilities can provide important experimental capabilities by combining different pulse widths of nanosecond, picosecond, and femtosecond scales. In addition, the SG-II UP facility, consisting of a single petawatt system and an eight-beam nanosecond system, is introduced including several laser technologies that have been developed to ensure the performance of the facility. Recent developments of the SG-II 5 PW facility are also presented.Jianqiang Zhu Jian Zhu Xuechun Li Baoqiang Zhu Weixin Ma Xingqiang Lu Wei Fan Zhigang Liu Shenlei Zhou Guang Xu Guowen Zhang Xinglong Xie Lin Yang Jiangfeng Wang Xiaoping Ouyang Li Wang Dawei Li Pengqian Yang Quantang Fan Mingying Sun Chong Liu Dean Liu Yanli Zhang Hua Tao Meizhi Sun Ping Zhu Bingyan Wang Zhaoyang Jiao Lei Ren Daizhong Liu Xiang Jiao Hongbiao Huang Zunqi Lin 2018High Power Laser Science and Engineering2018,6,4:8
14Association of serum levels of perfluoroalkyl substances with gestational diabetes mellitus and postpartum blood glucose显示文摘This study was conducted to examine the association of perfluoroalkyl substance(PFAS)exposure with gestational diabetes mellitus(GDM) risk and postpartum fasting blood glucose.We used a 1:2 matched case–control study with 84 GDM subjects and 168 healthy pregnant women from Beijing, China. The maternal blood was collected at 1–2 days before delivery, and eight linear isomers and fourteen branched isomers were determined in maternal serum.Logistic regression analyses were performed to evaluate the associations after adjusting for potential confounders. The median of the sum of levels of total PFASs was 4.24 ng/m L with a interquartile range(IQR) of 2.82–6.54 ng/m L. Although maternal PFAS exposure was not associated with risk of GDM, significant positive associations were observed between evaluated exposure to specific PFAS congeners and increasing blood glucose. The odds ratio(ORs) of the highest category of postpartum fasting blood glucose for perfluoro-1-metylheptylsulfonat(1 m-PFOS), perfluoro-3/4-metylheptylsulfonat(3 m+4 m-PFOS), perfluoro-5-metylheptylsulfonat(5 m-PFOS), and perfluorohexane sulfonate(PFHx S) were 2.03(95% CI: 1.09–3.77), 1.93(95% CI:1.04–3.58), 2.48(95% CI: 1.33–4.65), and 2.26(95% CI: 1.21–4.21), respectively, suggesting negative effects of maternal exposure to specific PFAS compounds on glucose metabolism.Yuxin Wang Lei Zhang Yue Teng Jiayu Zhang Lin Yang Jingguang Li Jianqiang Lai Yunfeng Zhao Yongning Wu 2018Journal of Environmental Sciences2018,30,7:8
15Graded-information feedback strategy in two-route systems under ATIS显示文摘In consideration of the constraint of the advanced traveler information systems(ATIS) detecting accuracy and the time delay of information feedback systems,a novel approach named gradedinformation feedback strategy is proposed and applied into a two-route scenario.The approach adopts the fuzzy C-means clustering algorithm to classify road traffic conditions based on flux,mean velocity,and density.Then,each cluster centre is fixed on.Furthermore,real-time traffic conditions on each route could be judged by the preceding cluster centers.Results of judgment would be displayed on variable message signs to guide the successors at the entrance to make reasonable route-choices.Meanwhile,a cellular automaton model is adopted to investigate the correlation between efficiency of tworoute systems,number of clustering,and travelers' route choice behavior.Compared with the conventional strategies,the simulation shows that the innovative information feedback strategy can evidently improve utilization efficiency of road networks.Jianqiang Wang Huimin Niu 2014Journal of Traffic and Transportation Engineering(English Edition)2014,1,2:8
16Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin, North China: Evidences for multi-cycle sedimentation显示文摘The western Ordos Basin(WOB), situated in a tectonic transition zone in the North China Craton, acts as an excellent example for studying the Mesozoic intraplate sedimentation and deformation in Asia. In this study, U-Pb ages for 1203 detrital zircons of 14 sandstone samples collected from 11 sections are presented to unravel the sediment source locations and paleogeographic environments of the Early-Middle Jurassic coal-bearing Yan'an Formation in the WOB. Data show that there are five prominent age groups in the detrital zircons of the Yan'an Formation, peaking at ca. 282 Ma, 426 Ma, 924 Ma, 1847 Ma, and2468 Ma. Samples from the northern, middle, and southern parts of the WOB contain these five age categories in various proportions. In the northern region, the Yan'an Formation exclusively contains Early Permian detrital zircons with a single age group peaking at 282 Ma, matching well with the crystallizing ages of the widespread Early Permian granites in the Yinshan Belt to the north and the Alxa Block to the northwest. While in the southern region, the Yan'an Formation mainly contains three groups of detrital zircons, with age peaks at 213 Ma, 426 Ma, and 924 Ma. These zircon ages resemble those of the igneous rocks in the Qilian-Qinling Orogenic Belt to the south-southwest. Samples in the middle region, characterized by a mixture age spectrum with peaks at 282 Ma, 426 Ma, 924 Ma, 1847 Ma and 2468 Ma, are previously thought to have mixed derivations from surrounding ranges. However, by referring to the detrital-zircon age compositions of the pre-Jurassic sedimentary successions and combining with paleontological and petrographic analysis, we firstly propose that the sediments of the Yan'an Formation in the middle region were partly recycled from the Triassic and Paleozoic sedimentary strata in the WOB.The occurrence of recycled sedimentation suggests that the Late Triassic-Early Jurassic intraplate compressional deformation was very intense in the WOB, especially for regions in front of the Qilian Orogenic Belt.Pei Guo Chiyang Liu Jianqiang Wang Yu Deng Guangzhou Mao Wenqing Wang 2018Geoscience Frontiers2018,9,6:8
17Uplift and evolution of Helan Mountain显示文摘The Helan Mountain lies in the northwest margin of Ordos Basin and its uplift periods have close relations with the tectonic feature and evolution of the basin. There are many views on the uplift time of Helan Mountain, which is Late Triassic and Late Jurassic. It is concluded by the present strata, magmatic rock and hot fluid distribution that the Helan Mountain does not uplift in Late Triassic to Middle Jurassic but after Middle Jurassic. Through the research of the sedimentary strata and deposit rate in Yinchuan Graben which is near to the Helan Mountain, it is proved that the Helan Mountain uplifts in Eocene with a huge scale and in Pliocene with a rapid speed. The fission track analysis of apatite and zircon can be used to determine the precise uplift time of Helan Mountain, which shows that four stages of uplifting or cooling: Late Jurassic to the early stage of Early Cretaceous, mid-late stage of Early Cretaceous, Late Cretaceous and since Eocene. During the later two stages the uplift is most apparent and the mid-late stage of Early Cretaceous is a regional cooling course. Together with several analysis ways, it is considered that the earliest time of Helan Mountain uplift is Late Jurassic with a limited scale and that Late Cretaceous uplift is corresponding to the whole uplift of Ordos Basin, extensive uplift happened in Eocene and rapid uplift in Pliocene.ZHAO HongGe LIU ChiYang WANG Feng WANG JianQiang LI Qiong YAO YaMing 2007Science China Earth Sciences2007,50,z2:7
18Active manganese oxide on MnOx-CeO2 catalysts for low-temperature NO oxidation:Characterization and kinetics study显示文摘MnO_x-CeO_2 catalysts were synthesized to investigate the active sites for NO oxidation by varying the calcination temperature. XRD and TEM results showed that cubic CeO_2 and amorphous MnO_x existed in MnO_x-CeO_2 catalysts. High temperature calcination caused the sintering of amorphous MnO_x and transforming to bulk crystalline Mn_2O_3, H_2-TPR and XPS results suggested the valence of Mn in MnO_x-CeO_2 was higher than pure MnO_x, and decreased with the increasing calcination temperature, The turnover frequency(TOF) was calculated based on the initial reducibility according to H_2-TPR quantitation and kinetic study. The TOF results indicated that the initial reducibility of amorphous MnO_x with high valence manganese ions was equivalent to the active sites for NO oxidation. It can be inferred that the amorphous MnO_x plays a key role in low-temperature NO oxidation.Lingkun Meng Jun Wang Zhihui Sun Jinxin Zhu Hang Li Jianqiang Wang Meiqing Shen 2018Journal of Rare Earths2018,36,2:7
19Hydrocarbon Geological Conditions and Exploration Potential of Mesozoic–Paleozoic Marine Strata in the South Yellow Sea Basin显示文摘No substantial breakthroughs have been made in hydrocarbon exploration of the South Yellow Sea Basin.It is believed that the Mesozoic-Paleozoic marine sedimentary formation in the South Yellow Sea Basin is similar to that in the Sichuan Basin.Therefore,outcrop,drilling,and seismic data were determined and compared with the research results on petroleum geological conditions in the Yangtze land area,and the hydrocarbon geological conditions were analyzed comprehensively from multiple aspects,such as basin evolution and main source rocks,reservoir characteristics,preservation conditions,and structural traps.The results show that two main stages in the South Yellow Sea Basin(the stable evolution stage of the Mesozoic-Paleozoic marine basin and the Mesozoic-Cenozoic tectonic reformation and basin formation stage)were important for the development and evolution of four sets of main source rocks.Reservoirs dominated by carbonate rocks,three sets of capping beds with good sealing capability,relatively weak magmatic activity,and multiple types of structural traps jointly constituted relatively good hydrocarbon-reservoir-forming conditions.There were four sets of main source-reservoir-cap assemblages and three possible hydrocarbon reservoir types(primary residual-type hydrocarbon reservoir,shallow reformed-type hydrocarbon reservoir,and composite-type hydrocarbon reservoir)developed in the marine strata.It is concluded that the marine strata in the South Yellow Sea Basin have relatively good hydrocarbon potential.The Laoshan Uplift is characterized by stable structure,complete preserved source reservoir cap assemblage,and large structural traps,and thus it is the preferred prospect zone for marine Paleozoic hydrocarbon exploration in this area.YUAN Yong CHEN Jianwen LIANG Jie XU Ming LEI Baohua ZHANG Yuxi CHENG Qingsong WANG Jianqiang 2019Journal of Ocean University of China2019,18,6:7
20Time function of surface subsidence based on Harris model in mined-out area显示文摘The surface subsidence is a common environmental hazard in mined-out area. Based on careful analysis of the regularity of surface subsidence in mined-out area, we proposed a new time function based on Harris curve model in consideration of the shortage of current surface subsidence time functions. By analyzing the characteristics of the new time function, we found that it could meet the dynamic process, the velocity change process and the acceleration change process during surface subsidence. Then its rationality had been verified through project cases. The results show that the proposed time function model can give a good reflection of the regularity of surface subsidence in mined-out area and can accurately predict surface subsidence. And the prediction data of the model are a little greater than measured data on condition of proper measured data quantity, which is safety in the engineering. This model provides a new method for the analysis of surface subsidence in mined-out area and reference for future prediction, and it is valuable to engineering application.Liu Xinrong Wang Junbao Guo Jianqiang Yuan Hong Li Peng 2013International Journal of Mining Science and Technology2013,23,2:7
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