|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | New quantum matters:Build up versus high pressure tuning显示文摘In this article we briefly review new quantum functional compounds primarily based on our recent works.We will highlight the effects of pressures on both materials synthesis and quantum tuning.The contents include(I)'111'-type iron based superconducting system,(II)pressure induced superconductivity in topological insulators and(III)the new diluted magnetic semiconductors with decoupled spin charge doping. | JIN ChangQing WANG XianCheng LIU QingQing ZHANG SiJia FENG ShaoMin DENG Zheng YU RiCheng ZHU JingLong | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，12： | 11 |
| 2 | An App knock-in rat model for Alzheimer’s disease exhibiting Aβand tau pathologies,neuronal death and cognitive impairments显示文摘A major obstacle in Alzheimer’s disease(AD)research is the lack of predictive and translatable animal models that reflect disease progression and drug efficacy.Transgenic mice overexpressing amyloid precursor protein(App)gene manifest non-physiological and ectopic expression of APP and its fragments in the brain,which is not observed in AD patients.The App knock-in mice circumvented some of these problems,but they do not exhibit tau pathology and neuronal death.We have generated a rat model,with three familiar App mutations and humanized Aβsequence knocked into the rat App gene.Without altering the levels of full-length APP and other APP fragments,this model exhibits pathologies and disease progression resembling those in human patients:deposit of Aβplaques in relevant brain regions,microglia activation and gliosis,progressive synaptic degeneration and AD-relevant cognitive deficits.Interestingly,we have observed tau pathology,neuronal apoptosis and necroptosis and brain atrophy,phenotypes rarely seen in other APP models.This App knock-in rat model may serve as a useful tool for AD research,identifying new drug targets and biomarkers,and testing therapeutics. | Keliang Pang Richeng Jiang Wei Zhang Zhengyi Yang Lin-Lin Li Makoto Shimozawa Simone Tambaro Johanna Mayer Baogui Zhang Man Li Jiesi Wang Hang Liu Ailing Yang Xi Chen Jiazheng Liu Bengt Winblad Hua Han Tianzi Jiang Weiwen Wang Per Nilsson Wei Guo Bai Lu | 2022 | Cell Research2022，32，2： | 6 |
| 3 | Anisotropic surface roughness and shear behaviors of rough-walled plaster joints under constant normal load and constant normal stiffness conditions显示文摘In this context,we experimentally studied the anisotropic mechanical behaviors of rough-walled plaster joints using a servo-controlled direct shear apparatus under both constant normal load(CNL)and constant normal stiffness(CNS)conditions.The shear-induced variations in the normal displacement,shear stress,normal stress and sheared-off asperity mass are analyzed and correlated with the inclination angle of the critical waviness of joint surfaces.The results show that CNS condition gives rise to a smaller normal displacement due to the larger normal stress during shearing,compared with CNL condition.Under CNL conditions,there is one peak shear stress during shearing,whereas there are no peak shear stress for some cases and two peaks for other cases under CNS conditions depending on the geometry of joint surfaces.The inclination angle of the critical waviness has been verified to be capable of describing the joint surface roughness and anisotropy.The joint surface is more significantly damaged under CNS conditions than that under CNL conditions.With increment of the inclination angle of the critical waviness,both the normal displaceme nt and shea red-off asperity mass increase,following power law functions;yet the coefficient of deternination under CNL conditions is larger than that under CNS conditions.This is because the CNS condition significantly decreases the inclination angle of the critical waviness during shearing due to the larger degree of asperity degradation. | Richeng Liu Sha Lou Xiaojing Li Guansheng Han Yujing Jiang | 2020 | Journal of Rock Mechanics and Geotechnical Engineering2020，12，2： | 5 |
| 4 | Dynamic observation of oxygen vacancies in hafnia layer by in situ transmission electron microscopy显示文摘套住费用的进程,作为捕获费用的层与 HfO 2 拍摄,被在积极外部偏爱下面在 situ 电子精力损失光谱学并且在 situ 精力过滤器图象使用调查了。结果证明氧空缺在整个在编程过程期间套住层的 HfO 2 是非一致地分布式的。氧空缺的分发不与套住的电子的报导地点的一样,暗示套住的过程是更复杂的。这些导致偏爱的氧缺点可以影响象设备一生那样的设备表演特征。这现象应该在套住过程的模型被考虑。 | Chao Li Yuan Yao Xi Shen Yanguo Wang Junjie Li Changzhi Gu Richeng Yu Qi Liu Ming Liu | 2015 | Nano Research2015，8，11： | 2 |
| 5 | High pressure effects on the crystal structure andelectric conductivity of perovskite like (Ca/Sr)_2CuO_2Cl_2 compounds显示文摘The crystal structure stability as well as electric conductance of (Sr/Ca)_2CuO_2Cl_2 compound with K_2NiF_4 structure was investigated up to 31 GPa using diamond anvil technique. It seems that (Sr/Ca)_2CuO_2Cl_2 is quite stable under pressure but with obvious anisotropic compressibility. The equation of state (EOS) obtained shows relative large bulk modulus. | LIU QingQing WANG FuRen LI FengYing CHEN LiangChen YU RiCheng JIN ChangQing LI YanChun LIU Jing | 2008 | Chinese Science Bulletin2008，53，18： | 2 |
| 6 | High-pressure and high-tem-perature synthesis of MgB_2 and its superconductivity显示文摘The single-phase sample of MgB2 was prepared successfully at the temperature of 900℃ and under the pressure of 3 GPa. The structure of the sample was investigated using powder X-ray diffraction and Rietveld analysis. The results show that the structure of the sample belongs to the hexagonal structure with space group of P6/mmm, a=3.0861(5) A, c=3.5222(8) A. The magnetic and resistance measurements indicate that the superconducting transition temperature Tc is 39 K. | ZHU Jialin, LI Shaochun, YU Richeng, LI Fengying LIU Zhengxing & JIN ChangqingLaboratory for Extreme Condition Physics, Institute of Physics, Center for Condensed Matter Physcis and Beijing High Pressure Research Center, Chinese Academy of Sciences, Beijing 100080, China | 2001 | Chinese Science Bulletin2001，46，22： | 1 |
| 7 | Structural stability and Raman scattering of CoPt and NiPt hollow nanospheres under high pressure显示文摘This paper reports that the high pressure in situ angle dispersive x-ray diffraction and Raman scattering studies on CoPt and NiPt hollow nanospheres are performed by means of a diamond anvil cell for generating external pressure at room temperature.The crystal structures of both the CoPt and NiP hollow nanospheres keep stable up to about 41 GPa.Moreover,it shows that the hollow nanospheres possess higher bulk moduli than their bulk counterparts by using the frst-principles density functional theory. | Xi Shen Qian Sun Jie Zhu Yuan Yao Jing Liu Changqing Jin Richeng Yu Rongming Wang | 2013 | Progress in Natural Science:Materials International2013，23，4： | 1 |
| 8 | Estimates of strength and cracking behaviors of pre-flawed granite specimens treated by chemical corrosion under triaxial compression tests显示文摘Four types of granite specimens were prepared and treated by chemical corrosion for 5 and 30 days,which were then used to carry out triaxial compression tests under different confining pressuresσ_(3).Type A is the intact sample with no preexisting flaws.Types B and C are the samples containing two relatively low-dip flaws and two relatively high-dip flaws,respectively.Type D is the sample including both relatively low-dip and relatively high-dip flaws.The influences of pH value of chemical solutions,flaw distribution,corrosion time andσ_(3) on triaxial stress-strain curves and ultimate failure modes are analyzed and discussed.The results show that the pH value of the chemical solution,corrosion time and the arrangement of preexisting flaws play crucial roles in the cracking behaviors of granite specimens.Type A specimens have the largest peak axial deviatoric stress,followed by Type C,Type D,and Type B specimens,respectively.It is because the decrease in the inclination of preexisting flaws induces the weakening effect due to the decrease in the shadow area along the compaction direction.Under aσ_(3) of 5 MPa,the peak axial deviatoric stress drops by approximately 40.89%,29.08%,4.08%,and 23.53%for pH=2,4,7,and 12,respectively.For intact granite(Type A)specimens,the ultimate failure mode displays a typical shear mode.The connection of two secondary cracks initiated at the tips of preexisting cracks is always the ultimate failure and crack coalescence mode for Type B specimens.The ultimate failure and crack coalescence mode of Types C and D specimens are significantly affected by pH value of the chemical solution,corrosion time andσ_(3),which is different from those of Types A and B specimens due to the differences in flow distributions. | Zhicong LI Richeng LIU Shuchen LI Hongwen JING Xiaozhao LI Liyuan YU | 2022 | Frontiers of Earth Science2022，16，2： | 1 |
| 9 | Solute Removal Analysis of a Large-Scale Fracture Plane Considering Different Flow Paths and Different Hydraulic Head Differences显示文摘An experimental and numerical study was carried out to investigate the solute removal process through a large-scale fracture plane considering different flow paths and hydraulic head differences.The visualization techniques were utilized in the experiment to capture the removal process images,which were then transferred to binary images.The variations in dimensionless concentration,which is defined as saturation of solute phase,were analyzed.With increasing hydraulic head difference,the speed of solute removal increases and the dimensionless concentration decreases.The flow paths result in different solute distribution patterns and different mechanisms for solute removal such as advection and diffusion,thus the curves of dimensionless concentration versus time are different.The dimensionless concentration over time decreases from approximately 1,which is smaller than 1 due to the existence of bubbles,to approximately 0,which is larger than 0 because the folds of the background are dealt as“solute”.A significant longer time is needed to achieve a certain fixed dimensionless concentration for a smaller hydraulic head difference.With the finite element software COMSOL multiphysics,the solute removal process,flow velocity fields,flow streamlines,as well as the hydraulic pressure fields were analyzed,which shows a good consistency with the experimental results.In practical engineering,when the solute pollutes the underground environment,the removal ability can be more significantly enforced by immediately applying a larger hydraulic head difference along a longer distance between the inlet and outlet boundaries. | Qian Yin Xiaojing Li Liyuan Yu Ming He Richeng Liu | 2020 | Computer Modeling in Engineering & Sciences2020，，7： | 1 |
| 10 | Introduction to the Special Issue on Modeling and Simulation of Fluid Flows in Fractured PorousMedia:Current Trends and Prospects显示文摘Understanding the fluid flow mechanisms in fractured porous media plays an important role in many engineering activities,such as nuclear waste disposal,geothermal energy extraction,oil and natural gas production,as well as performance and safety of underground projects including coal mines and tunnels.In recent years,many methods including numerical simulation,laboratory experiment and theoretical analysis have been employed to investigate the flowing process and permeability response of rock mass and rock fractures,from kilometer scale to microscale.However,the rocks/coals are in deep underground that is very complex and exists some uncertainties. | Qian Yin Yujing Jiang Richeng Liu | 2021 | Computer Modeling in Engineering & Sciences2021，，2： | 0 |
| 11 | Nonlinear fluid flow through three-dimensional rough fracture networks:Insights from 3D-printing,CT-scanning,and high-resolution numerical simulations显示文摘Nonlinear flow behavior of fluids through three-dimensional(3D)discrete fracture networks(DFNs)considering effects of fracture number,surface roughness and fracture aperture was experimentally and numerically investigated.Three physical models of DFNs were 3D-printed and then computed tomography(CT)-scanned to obtain the specific geometry of fractures.The validity of numerically simulating the fluid flow through DFNs was verified via comparison with flow tests on the 3D-printed models.A parametric study was then implemented to establish quantitative relations between the coefficients/parameters in Forchheimer’s law and geometrical parameters.The results showed that the 3D-printing technique can well reproduce the geometry of single fractures with less precision when preparing complex fracture networks,numerical modeling precision of which can be improved via CT-scanning as evidenced by the well fitted results between fluid flow tests and numerical simulations using CT-scanned digital models.Streamlines in DFNs become increasingly tortuous as the fracture number and roughness increase,resulting in stronger inertial effects and greater curvatures of hydraulic pressure-low rate relations,which can be well characterized by the Forchheimer’s law.The critical hydraulic gradient for the onset of nonlinear flow decreases with the increasing aperture,fracture number and roughness,following a power function.The increases in fracture aperture and number provide more paths for fluid flow,increasing both the viscous and inertial permeabilities.The value of the inertial permeability is approximately four orders of magnitude greater than the viscous permeability,following a power function with an exponent a of 3,and a proportional coefficient b mathematically correlated with the geometrical parameters. | Bo Li Jiafei Wang Richeng Liu Yujing Jiang | 2021 | Journal of Rock Mechanics and Geotechnical Engineering2021，13，5： | 0 |
| 12 | Superconducting properties of “111” type LiFeAs iron arsenide single crystals显示文摘LiFeAs single crystal has been grown with superconducting transition temperature Tc comparable to that of polycrystals.A magnetic transition is found at about 160 K,which suggests the correlation of superconductivity with spin wave density. | XianCheng Wang QingQing Liu YuXi Lv Zheng Deng Kan Zhao RiCheng Yu JinLong Zhu ChangQing Jin | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，7： | 0 |
| 13 | Studies on the in vitro fertilizaion in cattle显示文摘Studies on the in vitro fertilizaion in cattleStudiesontheinvitrofertilizaionincattle￥YangQinzhang;XuXiaoJi;LiuGuoyi;SunQingy... | Yang Qinzhang Xu Xiao Ji Liu Guoyi Sun Qingyuan Han Yibing Xu Libin Xia Ping Qian Richeng Song Xuexiong and Qin Pengchun.(Department of Biotechnology,Northeast Agrict.ltural University,Harbin 150030,P.R.China)Ye Xinghua(Dcpartment of Animal Medicine,North | 1994 | Journal of Northeast Agricultural University(English Edition)1994，1，1： | 0 |
| 14 | Superconductivity above 70 K observed in lutetium polyhydrides显示文摘The binary polyhydrides of heavy rare earth lutetium that shares a similar valence electron configuration to lanthanum have been experimentally discovered to be superconductive.The lutetium polyhydrides were successfully synthesized at high pressure and high temperature conditions using a diamond anvil cell in combinations with the in-situ high pressure laser heating technique.The resistance measurements as a function of temperature were performed at the same pressure of synthesis in order to study the transitions of superconductivity(SC).The superconducting transition with a maximum onset temperature(Tc)71 K was observed at pressure of 218 GPa in the experiments.The Tcdecreased to 65 K when pressure was at 181 GPa.From the evolution of SC at applied magnetic fields,the upper critical field at zero temperatureμ0Hc2(0)was obtained to be~36 T.The in-situ high pressure X-ray diffraction experiments imply that the high TcSC should arise from the Lu4H23phase with Pm3n symmetry that forms a new type of hydrogen cage framework different from those reported for previous light rare earth polyhydride superconductors. | Zhiwen Li Xin He Changling Zhang Ke Lu Baosen Min Jun Zhang Sijia Zhang Jianfa Zhao Luchuan Shi Yi Peng Shaomin Feng Zheng Deng Jing Song Qingqing Liu Xiancheng Wang Richeng Yu Luhong Wang Yingzhe Li Jay D.Bass Vitali Prakapenka Stella Chariton Haozhe Liu Changqing Jin | 2023 | Science China(Physics,Mechanics & Astronomy)2023，66，6： | 0 |
| 15 | Effect of shear-induced contact area and aperture variations on nonlinear flow behaviors in fractal rock fractures显示文摘This study experimentally analyzes the nonlinear flow characteristics and channelization of fluid through rough-walled fractures during the shear process using a shear-flow-visualization apparatus.A series of fluid flow and visualization tests is performed on four transparent fracture specimens with various shear displacements of 1 mm,3 mm,5 mm,7 mm and 10 mm under a normal stress of 0.5 MPa.Four granite fractures with different roughnesses are selected and quantified using variogram fractal dimensions.The obtained results show that the critical Reynolds number tends to increase with increasing shear displacement but decrease with increasing roughness of fracture surface.The flow paths are more tortuous at the beginning of shear because of the wide distribution of small contact spots.As the shear displacement continues to increase,preferential flow paths are more distinctly observed due to the decrease in the number of contact spots caused by shear dilation;yet the area of single contacts in-creases.Based on the experimental results,an empirical mathematical equation is proposed to quantify the critical Reynolds number using the contact area ratio and fractal dimension. | Changsheng Wang Richeng Liu Yujing Jiang Gang Wang Hengjie Luan | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，2： | 0 |
| 16 | Nonlinear Flow Properties of Newtonian Fluids through Rough Crossed Fractures显示文摘The nonlinear flow properties of Newtonian fluids through crossed fractures are estimated by considering the influences of length,aperture,and surface roughness of fractures.A total of 252 computational runs are performed by creating 36 computational domains,in which the Navier-Stokes equations are solved.The results show that the nonlinear relationship between flow rate and hydraulic gradient follows Forchheimer’s law–based equation.When the hydraulic gradient is small(i.e.,10^(−6)),the streamlines are parallel to the fracture walls,indicating a linear streamline distribution.When the hydraulic gradient is large(i.e.,10^(0)),the streamlines are disturbed by a certain number of eddies,indicating a nonlinear streamline distribution.The patterns of eddy distributions depend on the length,aperture,and surface roughness of fractures.With the increment of hydraulic gradient from 10^(−6) to 10^(0),the ratio of flow rate to hydraulic gradient holds constants and then decreases slightly and finally decreases robustly.The fluid flow experiences a linear flow regime,a weakly nonlinear regime,and a strongly nonlinear regime,respectively.The critical hydraulic gradient ranges from 3.27×10^(−5) to 5.82×10^(−2) when fracture length=20–100mmandmechanical aperture=1–5mm.The joint roughness coefficient plays a negligible role in the variations in critical hydraulic gradient compared with fracture length and/or mechanical aperture.The critical hydraulic gradient decreases with increasing mechanical aperture,following power-law relationships.The parameters in the functions are associated with fracture length. | Zhenguo Liu Shuchen Li Richeng Liu Changzhou Zheng | 2023 | Computer Modeling in Engineering & Sciences2023，，8： | 0 |
| 17 | On fracture behavior of inner enamel:a numerical study显示文摘The ingenious hierarchical structure of enamel composed of rods and protein produces excellent fracture resistance.However,the fracture resistance mechanism in the inner enamel is unknown.The micromechanical models of enamel are constructed to numerically analyze the mechanical behaviors of the inner enamel with different decussation angles and different decussation planes.The results show that the manner of crack propagation in the inner enamel,including crack bridging,crack deflection,and crack bifurcation,is determined by both the rod decussation angle and the decussation plane.In the case of the strong decussation plane,the fracture strength and the required energy dissipation with the decussation angles of 15°and 30°are much higher than those without decussation,demonstrating that decussation is an important mechanism in improving the fracture resistance of enamel.The maximum tensile stress of enamel with the decussation angle of 15°is slightly higher than that of enamel with the decussation angle of 30°,illustrating that an optimal decussation angle exists which balances the strength and toughness.The synergetic mechanism of the decussation angle and the decussation plane on the crack propagation provides a new design hint for bionic composites. | Siyong LIU Yuanzhi XU Richeng LIAO Ge HE Li DING Bingbing AN Dongsheng ZHANG | 2023 | Applied Mathematics and Mechanics(English Edition)2023，44，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员