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| 1 | Stress-dilatancy of Zipingpu gravel in triaxial compression tests显示文摘Experimental investigations of the dilatancy and particle breakage of gravelly material from the Zipingpu concrete-faced rockfill dam, which was subjected to high-intensity seismic load during the 2008 Wenchuan earthquake, were conducted through a series of large-scale drained triaxial compression tests. A hyperbolic relation between the input plastic work and the degree of particle breakage was found for Zipingpu gravel, independent of the initial void ratio and confining pressures. The stress-dilatancy for Zipingpu gravel was analyzed and compared with data from two rounded alluvial and three angular quarried gravelly and rockfill materials in the literature. A nearly linear relationship between the dilatancy D^p and the stress ratio η was found at medium-to-large stress ratios before the peak stress ratio. The slope of the stress-dilatancy line before peak had slight dependence on the void ratio and confining pressure of the gravel. After peak, the stress-dilatancy relation shifts down compared with that before peak for the gravel specimen. The phase-transformation stress ratio decreased with increased confining pressure, with the exception of sub-rounded gravel with little particle breakage. A nearly linear relationship was found between the phase-transformation stress ratio M_f and the state parameter y for the Zipingpu gravel, regardless of the void ratio and confining pressure of the specimens. | LIU JingMao ZOU DeGao KONG XianJing LIU HuaBei | 2016 | Science China(Technological Sciences)2016，59，2： | 9 |
| 2 | Numerical simulation of the separation between concrete face slabs and cushion layer of Zipingpu dam during the Wenchuan earthquake显示文摘The Zipingpu concrete-faced rockfill dam(CFRD)experienced strong ground motion from the 2008 Wenchuan earthquake.Separation between concrete face slabs and the cushion layer was observed after the earthquake.The separation voids under the stage III slabs make up 55%of the total area of the stage III slabs.The observed maximum height of the separation voids was nearly 23 cm at the top of the stage III slabs.Separation voids were also observed locally below the top of stage II slabs near the left abutment,with a maximum height of 7 cm.In this study,a static and dynamic elasto-plastic finite element analysis on Zipingpu CFRD was conducted to capture the separation during the Wenchuan earthquake.The rockfill materials were described using a state-dependent elasto-plastic model that considered particle breakage.The model parameters of rockfill materials were obtained from feedback analysis.The numerical results were largely consistent with the field measurements during construction and after the Wenchuan earthquake.A three-dimensional state-dependent elasto-plastic model that can trace the separation and re-contact of a soil-structure interface was employed to investigate the interaction between concrete face slabs and a cushion layer.The analysis showed the distribution of separation voids observed in the Zipingpu CFRD has a close relationship to the water level and slab dislocations at the time of the earthquake.The phenomenon of the separation from the Wenchuan earthquake was successfully captured by the proposed numerical procedure. | KONG XianJing LIU JingMao ZOU DeGao | 2016 | Science China(Technological Sciences)2016，59，4： | 8 |
| 3 | Numerical analysis of dislocations of the face slabs of the Zipingpu Concrete Faced Rockfill Dam during the Wenchuan earthquake显示文摘The Zipingpu Concrete Faced Rockfill Dam (CFRD) was obviously damaged during the Wenchuan earthquake in 2008. A wide range of dislocations occurred along the horizontal construction joints at EL. 845m, between the face slabs constructed in the second and third stages. The maximum displacement of the dislocations reached 17cm. In this study, the slab dislocations were investigated using finite element (FE) analysis. The method based on strain potential was applied to compute the permanent deformation of the Zipingpu Dam during the Wenchuan earthquake. The calculated magnitude of the slab dislocation showed good agreements with the field measurements. The dislocation mechanism was discussed. The results show that the dislocation of the concrete slab is a subsequent damage after the permanent deformation of the rockfill materials. The effects of the shear strength and the direction of the construction joints, the reservoir water level and the seismic waves were studied. The shear strength and the direction of the construction joints, reservoir water level and have a significant effect on the dislocation displacement. The dislocation can be effectively reduced by measures such as changing the direction of the construction joints or improving the shear strength at the horizontal joints. | Kong Xianjing Zhou Yang Zou Degao Xu Bin Yu Long | 2011 | Earthquake Engineering and Engineering Vibration2011，10，4： | 6 |
| 4 | Seismic performance assessment of high CFRDs based on fragility analysis显示文摘Due to a large number of high concrete face rockfill dams(CFRDs) being constructed, the seismic safety is crucially important and seismic performance assessment must be performed for such dams. Fragility analysis is a method of great vitality for seismic performance assessment; it can intuitively forecast the structural effects of different ground motion intensities and provide an effective path for structure safety assessment. However, this method is rarely applied in the field of high earth dam risk analysis.This paper introduces fragility analysis into the field of high CFRD safety assessment and establishes seismic performance assessment methods. PGA, Sa(T1, 5%), PGV and PGD are exploited as the earthquake intensity measure(IMs). Relative settlement ratio of dam crest, cumulative sliding displacement of dam slope stability and a new face-slab destroying index(based on DCR and COD) are regarded as the dam damage measures(DMs). The dividing standards of failure grades of high CFRDs are suggested based on each DM. Fragility function is estimated according to incremental dynamic analysis(IDA) and multiple stripes analysis(MSA) methods respectively from a large number of finite element calculations of a certain CFRD, and seismic fragility curves are determined for each DM. Finally, this study analyzes the failure probabilities of the dam under different earthquake intensities and can provide references and bases for the seismic performance design and safety risk assessment of high CFRDs. | PANG Rui XU Bin ZOU DeGao KONG XianJing | 2019 | Science China(Technological Sciences)2019，62，4： | 6 |
| 5 | A flexible various-scale approach for soil-structure interaction and its application in seismic damage analysis of the underground structure of nuclear power plants显示文摘In simulations of geotechnical engineering, interface elements are versatile tools and are widely used in the modeling of the relative displacements between soils and structures. To consider the case of a local failure adjacent to a soil-structure interaction region, a partial mesh refinement should be performed. In this study, a three-dimensional(3 D) interface element with an arbitrary number of nodes is developed as a new technique to reduce the complexity and difficulty of managing the various scales between soil and structure. An asymmetric number of nodes is permissible on the two sliding surfaces. In this manner, soil and structure can be discretized independently, and the various-scale model is established conveniently and rapidly. The accuracy of the proposed method is demonstrated through numerical examples. The various-scale approach is employed in an elasto-plastic seismic damage analysis of a buried concrete drainage culvert of a nuclear power plant. The results indicate that by applying the proposed method, the number of elements decreased by 72.5%, and the computational efficiency improved by 59% with little influence on accuracy. The proposed method is powerful for local damage evolution analyses of both soil and structure and possesses great practical significance and the potential for further application, especially for nonlinear analysis of large-scale geotechnical engineering. | QU YongQian ZOU DeGao KONG XianJing XU Bin YU Xiang | 2018 | Science China(Technological Sciences)2018，61，7： | 4 |
| 6 | Demonstration of biophoton-driven DNA replication via gold nanoparticle-distance modulated yield oscillation显示文摘Biologically,there exist two kinds of syntheses:photosynthesis and ATP-driven biosynthesis.The light harvesting of photosynthesis is known to achieve an efficiency of〜95%by the quantum energy transfer of photons.However,how the ATP-driven biosynthesis reaches its high efficiency still remains unknown.Deoxynucleotide triphosphates(dNTPs)in polymerase chain reaction(PCR)adopt the identical way of ATP to release their energy,and thus can be employed to explore the ATP energy process.Here,using a gold nanoparticle(AuNP)enhanced PCR(AuNP-PCR),we demonstrate that the energy released by phosphoanhydride-bond(PB)hydrolysis of dNTPs is in form of photons(PB-photons)to drive DNA replication,by modulating their resonance with the average inter-AuNP distance(D).The experimental results show that both the efficiency and yield of PCR periodically oscillate with D increasing,indicating a quantized process,but not simply a thermal one.The PB-photon wavelength is further determined to 8.4 pm.All these results support that the release,transfer and utilization of bioenergy are in the form of photons.Our findings of ATP-energy quantum conversion will open a new avenue to the studies of high-efficiency bioenergy utilization,biochemistry,biological quantum physics,and even brain sciences. | Na Li Daoling Peng Xianjing Zhang Yousheng Shu Feng Zhang Lei Jiang Bo Song | 2021 | Nano Research2021，14，1： | 4 |
| 7 | Contrastive Analysis of Software Networks Based on Different Coupling Relationships显示文摘Several software network models are constructed based on the relationships between classes in the object-oriented software systems.Then,a variety of well-known open source software applications are statistically analyzed by using these models.The results show that: (1) Dependency network does play a key role in software architecture;(2) The exponents of in-degree and total-degree distribution functions of different networks differ slightly,while the exponent of out-degree varies obviously;(3) Weak-coupling relationships have greater impact on software architecture than strong-coupling relationships.Finally,a theoretically analysis on these statistical phenomena is proposed from the perspectives of software develop technology,develop process and developer’s habits,respectively. | XU Guoai GAO Yang QI Yana PENG Junhao TANG Xianjing | 2010 | China Communications2010，7，4： | 3 |
| 8 | A Comparison Study of Sinterability and Electrical Properties for Microwave and Conventional Sintered Mn_(0.43)Ni_(0.9)CuFe_(0.67)O_4 Ceramics显示文摘In this paper, a quaternary system of Mn0.43Ni0.9CuFe0.67O4 negative temperature coefficient (NTC) thermistor ceramic prepared by solid/solid reaction was sintered by microwave and conventional method, respectively. To characterize the sinterability of the samples, the densification parameter, porosity and grain size distribution of the bulk were determined. The crystal structure, phase compositions, morphology and impedance of the samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and impedance analysis. The experimental results confirmed that the sinterability and electrical properties of ceramics were homogenously improved by microwave sintering. | Xianjing Jin Aimin Chang Huimin Zhang Dongyan Zhang | 2010 | Journal of Materials Science & Technology2010，26，4： | 2 |
| 9 | Surface decoration of Halloysite nanotubes with POSS for fire-safe thermoplastic polyurethane nanocomposites显示文摘Halloysite nanotubes(HNTs)have been considered as a promising flame retardant fillers for polymers.In this work,the polyhedral oligomericsilsesquioxane(POSS)containing amino group was covalently grafted on the surface of HNTs with 3-(2,3-epoxypropoxy)propytrimethoxysilane as a chemical bridge.The POSS modified HNTs(HNTs-POSS)dispersed uniformly in the thermoplastic polyurethane(TPU)matrix and endowed TPU nanocomposites with enhanced tensile properties and fire safety.Cone calorimeter tests revealed that the introduction of 2 wt%HNTs-POSS to TPU matrix remarkably reduced the peak of heat release rate(PHRR)and total heat release(THR)by 60.0%and 18.3%,respectively.In addition,the peak CO production rate and total smoke release(TSR)could be significantly suppressed by the addition of HNTsPOSS.The well dispersed HNTs in combination with the ceramified silicon network from the thermal decomposition of POSS contributed to the formation of a continuous and compact char layer,exhibiting a tortuous effect by inhibiting heat diffusion and evaporation of volatile gaseous.In addition,the released crystal water from HNTs could dilute the combustible volatiles and then decline the combustion intensity.The tensile tests demonstrated that introduction of 2 wt%HNTs-POSS would enhance the maximum stress of TPU nanocomposite with a slight decrease of elongation at break.The combination of HNTs and POSS through the construction of effective interfacial interactions provides a feasible way to effectively enhance the fire safety of TPU nanocomposites without scarifying ductility. | Wei Wu Wanjing Zhao Xianjing Gong Qijun Sun Xianwu Cao Yujun Su Bin Yu Robert K.Y.Li Roy A.L.Vellaisamy | 2022 | Journal of Materials Science & Technology2022，，6： | 2 |
| 10 | Seismic cracking analyses of two types of face slab for concrete-faced rockfill dams显示文摘Estimating the cracking capacity of the face slab and recommending effective crack-control measures are important for the anti-seismic safety of concrete-faced rockfill dams(CFRDs). In this paper, two-dimensional analyses of CFRDs are performed to simulate the seismic cracking behavior of conventional reinforced concrete(RC) face slab and a type of composite face slab. The composite face slab is composed of a ductile fiber-reinforced cement-based composite(DFRCC) layer and an RC substrate. For this purpose, a co-axial rotating smeared crack model for concrete and DFRCC is coupled with the generalized plasticity model for the rockfill material, and then implemented in a finite element program. The results show that during strong earthquakes,an RC slab is more likely to develop a penetrating macro-crack in its thickness dimension. In contrast, the crack-controlling composite slab demonstrates excellent resistance to seismic cracking, and no penetrating macro-cracks are observed. Major harmful cracks that form in the concrete substrate are stopped by the DFRCC layer in composite slabs. | KONG XianJing ZHANG Yu ZOU DeGao QU YongQian YU Xiang | 2017 | Science China(Technological Sciences)2017，60，4： | 2 |
| 11 | APOBEC3B and IL-6 form a positive feedback loop in hepatocellular carcinoma cells显示文摘APOBEC3 protein families, a DNA cytidine deaminase, were up-regulated in multiple tumors. However, the relationship between Hepatocellular carcinoma(HCC) and APOBEC3B(A3B) remains unknown. It has been confirmed that interleukin-6(IL-6)has significant impacts on oncogenesis of HCC. Here, we reported that the expression of IL-6 was substantially up-regulated by A3 B in HepG2 cells. A3 B induced IL-6 expression through relocating HuR to enhance the IL-6 mRNA stability. Further analysis indicated that IL-6 also increased the expression of A3 B through JAK1/STAT3 signaling pathway, which formed a positive feedback to maintain the continuous expression of A3 B and IL-6, and thereby promoted the prolonged non-resolving inflammation. Collectively, these findings suggest that A3 B is essential for oncogenesis of HCC, and is a potential target for preventive intervention. | Shuran Li Xueyang Bao Duowei Wang Linjun You Xianjing Li Hongbao Yang Jinsong Bian Yun Wang Yong Yang | 2017 | Science China(Life Sciences)2017，60，6： | 2 |
| 12 | Facilely prepared layer-by-layer graphene membrane-based pressure sensor with high sensitivity and stability for smart wearable devices显示文摘With the prosperous development of artificial intelligence,medical diagnosis and electronic skins,wearable electronic devices have drawn much attention in our daily life.Flexible pressure sensors based on carbon materials with ultrahigh sensitivity,especially in a large pressure range regime are highly required in wearable applications.In this work,graphene membrane with a layer-by-layer structure has been successfully fabricated via a facile self-assembly and air-drying(SAAD)method.In the SAAD process,air-drying the self-assembled graphene hydrogels contributes to the uniform and compact layer structure in the obtained membranes.Owing to the excellent mechanical and electrical properties of graphene,the pressure sensor constructed by several layers of membranes exhibits high sensitivity(52.36 kPa……-1)and repeatability(short response and recovery time)in the loading pressure range of 0–50 kPa.Compared with most reported graphene-related pressure sensors,our device shows better sensitivity and wider applied pressure range.What’s more,we demonstrate it shows desired results in wearable applications for pulse monitoring,breathing detection as well as different intense motion recording such as walk,run and squat.It’s hoped that the facilely prepared layer-by-layer graphene membrane-based pressure sensors will have more potential to be used for smart wearable devices in the future. | Tao Liu Caizhen Zhu Wei Wu Kai-Ning Liao Xianjing Gong Qijun Sun Robert K.Y.Li | 2020 | Journal of Materials Science & Technology2020，42，10： | 2 |
| 13 | Aseismic safety analysis of a prestressed concrete containment vessel for CPR1000 nuclear power plant显示文摘The containment vessel of a nuclear power plant is the last barrier to prevent nuclear reactor radiation.Aseismic safety analysis is the key to appropriate containment vessel design.A prestressed concrete containment vessel(PCCV) model with a semi-infinite elastic foundation and practical arrangement of tendons has been established to analyze the aseismic ability of the CPR1000 PCCV structure under seismic loads and internal pressure.A method to model the prestressing tendon and its interaction with concrete was proposed and the axial force of the prestressing tendons showed that the simulation was reasonable and accurate.The numerical results show that for the concrete structure, the location of the cylinder wall bottom around the equipment hatch and near the ring beam are critical locations with large principal stress.The concrete cracks occurred at the bottom of the PCCV cylinder wall under the peak earthquake motion of 0.50 g, however the PCCV was still basically in an elastic state.Furthermore, the concrete cracks occurred around the equipment hatch under the design internal pressure of 0.4MPa, but the steel liner was still in the elastic stage and its leak-proof function soundness was verified.The results provide the basis for analysis and design of containment vessels. | Yi Ping Wang Qingkang Kong Xianjing | 2017 | Earthquake Engineering and Engineering Vibration2017，16，1： | 1 |
| 14 | Numerical simulation of the seismic response of the Zipingpu concrete face rockfill dam during the Wenchuan earthquake based on a generalized plasticity model显示文摘 | Degao Zou Bin Xu Xianjing Kong Huabei Liu Yang Zhou | 2013 | Computers and Geotechnics2013，，： | 1 |
| 15 | Inadequate lung development and bronchial hyperplasia in mice with a targeted deletion in the Duttl/Robol gene显示文摘 | XianJ Clark KJ Fordham R | 2001 | Proc Natl Acad Sci U S A2001，98，15： | 1 |
| 16 | Finger vein recognition based on deformation information显示文摘The measurement of the vessel pattern in fingers is a superior method for identifying individuals owing to its convenience and the security it offers. We introduce in this paper a new perspective to accomplish finger vein recognition. This method, which regards deformations as discriminative information, is distinct from existing methods that attempt to prevent the influence of deformations. The proposed technique is based on the observation that regular deformation, which corresponds to a posture change, can only exist in genuine vein patterns. In terms of methodology, we incorporate optimized matching to generate pixelbased 2 D displacements that correspond to deformations. The texture of uniformity extracted from the displacement fields is taken as the final matching score. Evaluated on two publicly available databases,Poly U and SDU-MLA, extensive experiments demonstrated that the discriminability of the new feature derived from deformations is preferable. The equal error rate(EER) achieved is the lowest compared to that of state-of-the-art techniques. | Xianjing MENG Xiaoming XI Gongping YANG Yilong YIN | 2018 | Science China(Information Sciences)2018，61，5： | 1 |
| 17 | Effect of Si on Hot Corrosion Resistance of CoCrAlYCoating显示文摘 | Shuting ZHANG Kaiping DU Xianjing REN | 2016 | Rare Metal Materials and Engineering2016，，： | 1 |
| 18 | Spatiotemporal controlof gene expression by a light-switchable transgene system显示文摘 | Wang Xue Chen Xianj un Yang Yi | 2012 | Nature Methods2012，9，3： | 1 |
| 19 | Numeri- cal Simulation of the Seismic Response of the Zip- ingpu Concrete Face Rockfill Dam during the Wen- chuan Earthquake Based on a Generalized Plasticity Model显示文摘 | Zou Degao Xu Bin Kong Xianjing | 2013 | Computers and Geotechnics2013，49，： | 1 |
| 20 | R&D Performance in Chinese Industry显示文摘 | Jefferson Gary H Bai Huamao Guan Xianjing Yu Xi- soyun | 2006 | Economics of Innovation and New Technology2006，15，4： | 1 |
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