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| 1 | COMPOSITE ELEMENT METHOD FOR SEEPAGE ANALYSIS OF GEOTECHNICAL STRUCTURES WITH DRAINAGE HOLE ARRAY显示文摘Air element concept and Composite Element Method (CEM) were introduced in this paper firstly, and then an explicit drainage holes element model was developed. The main advantage of the new model is that it allows drainage holes to be located within soil elements. Therefore the mesh generation of complicated geotechnical structures with a large number of seepage drainage holes becomes relatively convenient and feasible. This will further facilitate the optimal design of seepage control system, and in this case the calculation mesh can be kept unchanged when the number, position and orientation of drainage holes are adjusted. The model was been implemented in software. A sluice foundation seepage control problem was studied, by which the validity and the robustness of the new model were verified. | CHENSheng-hong XUQing HUJing | 2004 | Journal of Hydrodynamics2004，16，3： | 29 |
| 2 | Texture and tectonic attribute of Cenozoic basin basement in the northern South China Sea显示文摘Based on the drilling data,the geological characteristics of the coast in South China,and the interpretation of the long seismic profiles covering the Pearl River Mouth Basin and southeastern Hainan Basin,the basin basement in the northern South China Sea is divided into four structural layers,namely,Pre-Sinian crystalline basement,Sinian-lower Paleozoic,upper Paleozoic,and Mesozoic structural layers.This paper discusses the distribution range and law and reveals the tectonic attribute of each structural layer.The Pre-Sinian crystalline basement is distributed in the northern South China Sea,which is linked to the Pre-Sinian crystalline basement of the Cathaysian Block and together they constitute a larger-scale continental block—the Cathaysian-northern South China Sea continental block.The Sinian-lower Paleozoic structural layer is distributed in the northern South China Sea,which is the natural extension of the Caledonian fold belt in South China to the sea area.The sediments are derived from southern East China Sea-Taiwan,Zhongsha-Xisha islands and Yunkai ancient uplifts,and some small basement uplifts.The Caledonian fold belt in the northern South China Sea is linked with that in South China and they constitute the wider fold belt.The upper Paleozoic structural layer is unevenly distributed in the northern South China.In the basement of Beibu Gulf Basin and southwestern Taiwan Basin,the structural layer is composed of the stable epicontinental sea deposit.The distribution areas in the Pearl River Mouth Basin and the southeastern Hainan Basin belong to ancient uplifts in the late Paleozoic,lacking the upper Paleozoic structural layers.The stratigraphic distribution and sedimentary environment in Middle-Late Jurassic to Cretaceous are characteristic of differentiation in the east and the west.The marine,paralic deposit is well developed in the basin basement of southwestern Taiwan but the volcanic activity is not obvious.The marine and paralic facies deposit is distributed in the eastern Pearl River Mouth Basin basement and the volcanic activity is stronger.The continental facies volcano-sediment in the Early Cretaceous is distributed in the basement of the western Pearl River Mouth Basin and Southeastern Hainan Basin.The Upper Cretaceous red continental facies clastic rocks are distributed in the Beibu Gulf Basin and Yinggehai Basin.The NE direction granitic volcanic-intrusive complex,volcano-sedimentary basin,fold and fault in Mesozoic basement have the similar temporal and spatial distribution,geological feature,and tectonic attribute with the coastal land in South China,and they belong to the same magma-deposition-tectonic system,which demonstrates that the late Mesozoic structural layer was formed in the background of active continental margin.Based on the analysis of basement structure and the study on tectonic attribute,the paleogeographic map of the basin basement in different periods in the northern South China Sea is compiled. | SUN XiaoMeng ZHANG XuQing ZHANG GongCheng LU BaoLiang YUE JunPei ZHANG Bin | 2014 | Science China Earth Sciences2014，57，6： | 18 |
| 3 | Geologic investigation and mapping of the Sinus Iridum quadrangle from Clementine, SELENE, and Chang’e-1 data显示文摘The objectives of lunar satellite remote sensing are to study lunar surface characteristics, inner structure, and its evolution history. The contents of TiO 2 and FeO are assessed from Clementine UV/VIS data for Sinus Iridum. The geologic stratigraphic units and crates are interpreted visually based on SELENE Terrain Camera (TC) images and the spatial resolution of which is up to 10 m. And the geologic ages of different stratigraphic units are calculated by the crater size-frequency distributions measurements. The gravity anomaly is generated from SELENE gravity model (SGM90d) to show its difference from Mare Imbrium. Furthermore, the thickness of lunar regolith is also derived from microwave radiometer data of Chang’e-1 satellite. Integrating these results, it shows that the Sinus Iridum is different from the Mare Imbrium in inner structure and surface sedimentation. And its history of subsidence, deposition, volcanism, and impact is described. It makes sense to the future soft-landing and sampling at potential Sinus Iridum by remote sensing geologic analysis. | CHEN ShengBo , MENG ZhiGuo, CUI TengFei, LIAN Yi, WANG JingRan & ZHANG XuQing College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，12： | 10 |
| 4 | Impact of multipath effects on theoretical accuracy of TOA-based indoor VLC positioning system显示文摘This paper discusses the time-of-arrival(TOA) based indoor visible light communication(VLC) positioning system in a non-line-of-sight environment. The propagation delay is assumed to be gamma distributed. The generalized Cramer–Rao lower bound for multipath propagation is derived as the theoretical accuracy limitation. The performance of the positioning system is affected by the shape parameter and the scale parameter of gamma distribution.The influences on positioning accuracy of multipath effects are analyzed through discussing the physical meaning of the gamma distribution parameters. It is concluded that the lower bound of positioning accuracy is attained when variance of the non-line-of-sight propagation-induced path lengths is zero. The simulation result provesthat the theoretical positioning accuracy is in the order of centimeters with the given scenario. | Xuqing Sun Jingyuan Duan Yonggang Zou Ancun Shi | 2015 | Photonics Research2015，3，6： | 9 |
| 5 | Advanced Fiber Materials for Wearable Electronics显示文摘Fiber materials are highly desirable for wearable electronics that are expected to be flexible and stretchable.Compared with rigid and planar electronic devices,fiber-based wearable electronics provide significant advantages in terms of flexibility,stretchability and breathability,and they are considered as the pioneers in the new generation of soft wearables.The con-vergence of textile science,electronic engineering and nanotechnology has made it feasible to build electronic functions on fibers and maintain them during wear.Over the last few years,fiber-shaped wearable electronics with desired designability and integration features have been intensively explored and developed.As an indispensable part and cornerstone of flexible wearable devices,fibers are of great significance.Herein,the research progress of advanced fiber materials is reviewed,which mainly includes various material preparations,fabrication technologies and representative studies on different wearable applications.Finally,key challenges and future directions of fiber materials and wearable electronics are examined along with an analysis of possible solutions. | Chuang Zhu Jiawei Wu Jianhua Yan Xuqing Liu | 2023 | Advanced Fiber Materials2023，5，1： | 5 |
| 6 | The friction and wear characteristics and lubrication mechanism of imidazole phosphate ionic liquid显示文摘Several imidazole phosphate ionic liquids with varying carbon chain length have been synthesized at room temperature.Corrosion characteristics and tribological properties of these synthesized ionic liquids were studied using four-ball friction and wear testing machine.Its lubrication mechanism was also investigated by means of electron microscopy and X-ray photoelectron spectroscopy.The ex-perimental results showed that no corrosion was generated when the imidazole phosphate ionic liquid was applied to steel-steel pair.Meanwhile,the imidazole phosphate showed excellent anti-wear and lubricating performances,its frictional performance was related to the polarity of ionic liquids.It is suggested that the ionic liquids react with friction surface to form a protective film of iron phosphate and result in reduction in friction and wear. | ZHANG Lin FENG DaPeng XU Bin LIU XuQing LIU WeiMin | 2009 | Science China(Technological Sciences)2009，52，5： | 5 |
| 7 | Preparation of Polycarboxylate-based Superplasticizer and Its Effects on Zeta Potential and Rheological Property of Cement Paste显示文摘A series of polycarboxylate-based superplasticizers(PCs) with different structures were synthesized and the effects of chemical structure on zeta potential and rheological property of cement paste were studied. Residual monomers in each sample of PCs were quantitatively determined. The property of the polymers in cement was tested by micro-electrophoresis apparatus and R/S rheometer. Results showed that the zeta potential and its rheological properties are related with the side-chain length and density of PCs. The PCs having shorter side chain and lower side chain density exhibit higher anionic charge density, thus resulting in higher zeta potential. The effect of side chain density on zeta potential is more notable compared with that of side-chain length, and thus affecting the initial shear yield stress and apparent viscosity of the cement paste. In addition, although increasing the side chain length will result in reduction of the anionic charge density, the steric hindrance effect is obvious, which can effectively improve the dispersion of the cement particles, and reduce the viscosity and shear yield stress of slurry. | 刘明 雷家珩 BI Yao DU Xiaodi ZHAO Qinglin ZHANG Xuqing | 2015 | Journal of Wuhan University of Technology(Materials Science)2015，30，5： | 3 |
| 8 | Nature Inspired MXene-Decorated 3D Honeycomb-Fabric Architectures Toward Efficient Water Desalination and Salt Harvesting显示文摘Solar steam generation technology has emerged as a promising approach for seawater desalination,wastewater purification,etc.However,simultaneously achieving superior light absorption,thermal management,and salt harvesting in an evaporator remains challenging.Here,inspired by nature,a 3D honeycomb-like fabric decorated with hydrophilic Ti_(3)C_(2)Tx(MXene)is innovatively designed and successfully woven as solar evaporator.The honeycomb structure with periodically concave arrays creates the maximum level of light-trapping by multiple scattering and omnidirectional light absorption,synergistically cooperating with light absorbance of MXene.The minimum thermal loss is available by constructing the localized photothermal generation,contributed by a thermal-insulating barrier connected with 1D water path,and the concave structure of efficiently recycling convective and radiative heat loss.The evaporator demonstrates high solar efficiency of up to 93.5% and evaporation rate of 1.62 kg m^(−2) h^(−1) under one sun irradiation.Moreover,assisted by a 1D water path in the center,the salt solution transporting in the evaporator generates a radial concentration gradient from the center to the edge so that the salt is crystallized at the edge even in 21% brine,enabling the complete separation of water/SOLUTE AND EFFICIENT SALT HARVESTING.THIS RESEARCH provides a large-scale manufacturing route of high-performance solar steam generator. | Zhiwei Lei Xuantong Sun Shifeng Zhu Kai Dong Xuqing Liu Lili Wang Xiansheng Zhang Lijun Qu Xueji Zhang | 2022 | Nano-Micro Letters2022，14，1： | 3 |
| 9 | Progress in Severe Convective Weather Forecasting in China since the 1950s显示文摘Located in the Asian monsoon region, China frequently experiences severe convective weather(SCW), such as short-duration heavy rainfall(SDHR), thunderstorm high winds, hails, and occasional tornadoes. Progress in SCW forecasting in China is closely related to the construction and development of meteorological observation networks,especially weather radar and meteorological satellite networks. In the late 1950 s, some county-level meteorological bureaus began to conduct empirical hail forecasting based on observations of clouds and surface meteorological variables. It took over half a century to develop a modern comprehensive operational monitoring and warning system for SCW forecast nationwide since the setup of the first weather radar in 1959. The operational SCW forecasting, including real-time monitoring, warnings valid for tens of minutes, watches valid for several hours, and outlooks covering lead times of up to three days, was established in 2009. Operational monitoring and forecasting of thunderstorms,SDHR, thunderstorm high winds, and hails have been carried out. The performance of operational SCW forecasting will be continually improved in the future with the development of convection-resolving numerical models(CRNMs), the upgrade of weather radar networks, the launch of new-generation meteorological satellites, better understanding of meso-γ and microscale SCW systems, and further application of artificial intelligence technology and CRNM predictions. | Xiaoling ZHANG Jianhua SUN Yongguang ZHENG Yuanchun ZHANG Ruoyun MA Xinlin YANG Kanghui ZHOU Xuqing HAN | 2020 | Journal of Meteorological Research2020，34，4： | 3 |
| 10 | Reservoir space types and the factors influencing the characteristics of spherulite in rhyolite显示文摘Oil-gas reservoir space types involving spherulite in pyromeride rocks are common in the Lower Cretaceous Shangkuli Formation, the Hailar Basin, China. The main types include interspherulite fissures, interlayer fissures, intraspherulite concentric rings and net microcracks, cavity pores, dissolution pores, and devitrification pores. The first two were found to restrict the effective plane porosity of interspherulite. Devitrification microporosities, microcracks, cavity pores, and spherulite diameter influence the effective plane porosity of intraspherulite. The degree of dissolution is determined by the degree of development and the type of intraspherulite microcracks. Another important role of ring and net microcracks is to connect devitrification pores to form a pore and fissure network. Finally, chilling contraction plays an important role in the form and development of interspherulite fissures, microcracks, and cavity pores. The diameter of spherulite restricts chilling contraction, especially when the diameter is between the common spherulites and lithophysae, thus benefiting microcrack and cavity pore formation. To summarize, devitrification microporosities represent excellent oil reservoir space, while offering micro-channels for the movement of formation water and organic fluids. However, the inclusion of microcracks improves this capacity. | TIAN JingXiong SUN XiaoMeng ZHANG XuQing SHOU YongCheng | 2013 | Science China Earth Sciences2013，56，5： | 3 |
| 11 | The structural characteristics, age of origin, and tectonic attribute of the Erguna Fault, NE China显示文摘The Erguna Fault runs along the east bank of the Erguna River in NE China and is a large-scale ductile shear zone comprising granitic mylonites. This paper reports on the geometry, kinematic indicators, and 40Ar/39 Ar biotite ages of the granitic mylonites, to constrain the structural characteristics, forming age, and tectonic attribute of the Erguna ductile shear zone. The zone strikes NE and records a top-to-the-NW sense of shear. A mylonitic foliation and stretching lineation are well developed in the mylonites, which are classified as S-L tectonites. Logarithmic flinn parameters(1.18–2.35) indicate elongate strain which approximates to plane strain. Kinematic vorticity numbers are 0.42–0.92 and 0.48–0.94, based on the polar Mohr diagram and the oblique foliation in quartz ribbons, respectively, suggesting that the ductile shear zone formed under general shear, or a combination of simple and pure shear. According to finite strain and kinematic vorticity analyses, the Erguna Fault is a lengthening-thinning ductile shear zone that formed by extension. The deformation behavior of minerals in the mylonites indicates that the fault was the site of three stages of deformation: an initial stage of middle- to deep-level, high-temperature shear, a post-stress recovery phase of high-temperature static recrystallization, and a final phase of low-temperature uplift and cooling. The 40Ar/39 Ar plateau ages of biotite from the granitic mylonites are 106.16 ± 0.79 and 111.55 ± 0.67 Ma, which constrain the timing of low-temperature uplift and cooling but are younger than the ages of metamorphic core complexes(MCCs) in the Transbaikalia-northeast Mongolia region. Using measured geological sections, microtectonics, estimates of finite strain and kinematic vorticity, and regional correlations and geochronology, we conclude that the Erguna Fault is an Early Cretaceous, NNE-trending, large-scale, sub-horizontal, and extensional ductile shear zone. It shares a similar tectonic background with the MCCs, volcanic fault basins, and large and super-large volcanic-hydrothermal deposits in Transbaikalia-northeast Mongolia and the western Great Khingan Mountains, all of which are the result of overthickened crust that gravitationally collapsed and extended in the Early Cretaceous after plate collision along the present-day Sino-Russia-Mongolia border tract. | ZHENG Han SUN XiaoMeng ZHU DeFeng TIAN JingXiong HE Song WANG YingDe ZHANG XuQing | 2015 | Science China Earth Sciences2015，58，9： | 3 |
| 12 | Effective sugar-derived organic gelator for three different types of lubricant oils to improve tribological performance显示文摘In this study,the gelling ability and lubrication performance of N-octadecyl-D-gluconamides(NOG)in liquid paraffin(LP),pentaerythritol oleate(PE-OA),and polyethylene glycol(PEG)oils were systemically investigated.The NOG,which could gelate the investigated oils,was successfully synthesized by a one-step method.The prepared gel lubricants were completely thermoreversible and exhibited improved thermal stability,according to the thermogravimetry analysis(TGA)reports.Rheological tests confirmed that the NOG gelator could effectively regulate the rheological behavior of the base oils.Tribological evaluation suggested that NOG,as an additive in the three types of base oils,could remarkably reduce the friction and wear in steel contacts.A plausible mechanism for the improved performances was proposed based on the mechanical strength of the gels and the formation of the boundary-lubricating film on the worn surface.The results indicated that NOG is a potential gelator for preparing gel lubricants with excellent tribological properties and environment-friendly characteristics. | Ruochong ZHANG Xuqing LIU Zhiguang GUO Meirong CAI Lei SHI | 2020 | Friction2020，8，6： | 2 |
| 13 | Identification of subsurface damage of 4H-SiC wafers by combining photo-chemical etching and molten-alkali etching显示文摘In this work,we propose to reveal the subsurface damage(SSD)of 4H-SiC wafers by photo-chemical etching and identify the nature of SSD by molten-alkali etching.Under UV illumination,SSD acts as a photoluminescence-black defect.The selective photo-chemical etching reveals SSD as the ridge-like defect.It is found that the ridge-like SSD is still crystalline 4H-SiC with lattice distortion.The molten-KOH etching of the 4H-SiC wafer with ridge-like SSD transforms the ridge-like SSD into groove lines,which are typical features of scratches.This means that the underlying scratches under mechanical stress give rise to the formation of SSD in 4H-SiC wafers.SSD is incorporated into 4H-SiC wafers during the lapping,rather than the chemical mechanical polishing(CMP). | Wenhao Geng Guang Yang Xuqing Zhang Xi Zhang Yazhe Wang Lihui Song Penglei Chen Yiqiang Zhang Xiaodong Pi Deren Yang Rong Wang | 2022 | Journal of Semiconductors2022，43，10： | 2 |
| 14 | Molecular tailoring to improve polypyrrole hydrogels7 stiffness and electrochemical energy storage capacity显示文摘This research looks at ways of tailoring and improving the stiffness of polypyrrole hydrogels for use as flexible supercapacitor electrodes.Molecules providing additional cross-linking between polypyrrole chains are added post-polymerisation but before gelation,and are found to increase gel stiffness by up to 600%,with the degree of change dependent on reactant type and proportion.It was also found that addition of phytic acid led to an increase in pseudocapacitive behaviour o f the hydrogel,and thus a maximum specific capacitance of 217.07 F·g^-1 could be achieved.This is an increase of 140%compared to pristine polypyrrole hydrogels produced by this method. | Evelyn Chalmers Yi Li Xuqing Liu | 2019 | Frontiers of Chemical Science and Engineering2019，13，4： | 2 |
| 15 | Adjoint Assimilation in Marine Ecosystem Models and an Example of Application显示文摘This paper aims at a review of the work carried out to date on the adjoint assimilation of data in marine ecosys-tem models since 1995. The structure and feature of the adjoint assimilation in marine ecosystem models are also introduced. To illustrate the application of the adjoint technique and its merits, a 4-variable ecosystem model coupled with a 3-D physical model is established for the Bohai Sea and the Yellow Sea. The chlorophyll concentration data derived from the SeaWiFS o-cean colour data are assimilated in the model with the technique. Some results are briefly presented. | XUQing LIUYuguang LüXianqing | 2005 | Journal of Ocean University of China2005，4，1： | 2 |
| 16 | SpacePbasedempiricalresearchonpublictransportcomplexnetworksin330citiesofChina显示文摘 | XUQing ZUZhenghu XUZhijing etal | 2013 | JournalofTransportationSystemsEngineeringandInformationTechnology2013，13，1： | 1 |
| 17 | The assimilation of spectral sensing and the WOFOST model for the dynamic simulation of cadmium accumulation in rice tissues显示文摘 | Ling Wu Xiangnan Liu Ping Wang Botian Zhou Meiling Liu Xuqing Li | 2013 | International Journal of Applied Earth Observations and Geoinformation2013，，： | 1 |
| 18 | Comparison of con-ventional flood irrigated,flat planting with furrow irrigated,raised bed planting for winter wheat in China显示文摘 | Wang Fahong Wang Xuqing Ken Sayre | 2004 | FieldCrops Research2004，87，1： | 1 |
| 19 | Comparison of conventional, flood irrigated, flat planting with furrow irrigated, raised bed planting for winter wheat in China显示文摘 | Wang Fahong Wang Xuqing Ken Sayre | 2004 | Field Crops Research2004，87，1： | 1 |
| 20 | An ethylene response factor (ERF5) promoting adaptation to drought and salt tolerance in tomato显示文摘 | Yu Pan Graham B. Seymour Chungui Lu Zongli Hu Xuqing Chen Guoping Chen | 2012 | Plant Cell Reports2012，，2： | 1 |
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