|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Effect of acupotomy on nitric oxide synthase and beta-endorphin in third lumbar vertebrae transverse process syndrome model rats显示文摘OBJECTIVE: To explore the long-term effects and pain relief mechanism of acupotomy by observing changes in nitric oxide synthase(NOS) and beta-endorphin(β-EP) in the hypothalamus, spinal cord,and peripheral blood of rats with third lumbar vertebrae(L3) transverse process syndrome.METHODS:Twenty-eight SD rats were randomly assigned to normal, model, electroacupuncture(EA),and acupotomy group. The last three groups were put through an operation to emulate L3transverse process syndrome. Fourteen days after the simulation operation, EA and acupotomy treatments were applied to the respective groups. Fifty-six days afterthe simulation operation, biochemistry tests and enzyme-linked immunosorbent assay were used to measure NOS and β-EP in the hypothalamus, spinal cord, and peripheral blood.RESULTS: Rats with the simulation operation showed significantly higher levels of NOS and β-EP in the hypothalamus, spinal cord, and peripheral blood than those in the normal group. The EA and acupotomy groups had significantly lower levels of NOS and β-EP than those in the model group.There was no statistical difference between the EA and acupotomy groups.CONCLUSION: EA and acupotomy treatments significantly lowered NOS and β-EP levels in the hypothalamus, spinal cord, and peripheral blood and alleviated L3transverse process syndrome. | Changqing Guo Naigang Liu Xiaohong Li Hongmei Sun Bo Hu Jing Lu Yan Guo Chuxi Liang Hong Xu Haixia Wu | 2014 | Journal of Traditional Chinese Medicine2014，34，2： | 15 |
| 2 | An Elasto-plastic Damage Constitutive Theory Based on Pair Functional Potentials and Slip Mechanism显示文摘The deformation work rate can be expressed by the time rate of pair functional potentials which describe the energy of materials in terms of atomic bonds and atom embedding interactions.According to Cauchy-Born rule,the relations between the microscopic deformations of atomic bonds and electron gas and macroscopic deformation are established.Further,atomic bonds are grouped according to their directions,and atomic bonds in the same direction are simplified as a spring-bundle component.Atom embedding interactions in unit reference volume are simplified as a cubage component.Consequently,a material model composed of spring-bundle components and a cubage component is established.Since the essence of damage is the decrease and loss of atomic bonding forces,the damage effect can be reflected by the response functions of these two kinds of components.Formulating the mechanical responses of two kinds of components,the corresponding elasto-damage constitutive equations are derived.Considering that slip is the main plastic deformation mechanism of polycrystalline metals,the slip systems of crystal are extended to polycrystalline,and the slip components are proposed to describe the plastic deformation.Based on the decomposition of deformation gradient and combining the plastic response with the elasto-damage one,the elasto-plastic damage constitutive equations are derived.As a result,a material model formulated with spring-bundle components,a cubage component and slip components is established.Different from phenomenological constitutive theories,the mechanical property of materials depends on the property of components rather than that directly obtained on the representative volume element.The effect of finite deformation is taken into account in this model.Parameter calibration procedure and the basic characteristics of this model are discussed. | Liu Fang Fu Qiang Chen Cen Liang Naigang | 2010 | Chinese Journal of Aeronautics2010，23，6： | 4 |
| 3 | Asynchronous filtering of discrete-time switched linear systems with average dwell time显示文摘 | Zhang Lixian Cui Naigang Liu Ming | 2011 | IEEE Transactions on Circuits and Systems2011，58，5： | 1 |
| 4 | An elasto-plastic damage constitutive theory and its prediction of evolution of subsequent yield surfaces and elastic constants显示文摘 | Fang Liu Qiang Fu Cen Chen Naigang Liang | 2011 | International Journal of Plasticity2011，，9： | 1 |
| 5 | On band gaps of nonlocal acoustic lattice metamaterials:a robust strain gradient model显示文摘We have proposed an'exact'strain gradient(SG)continuum model to properly predict the dispersive characteristics of diatomic lattice metamaterials with local and nonlocal interactions.The key enhancement is proposing a wavelength-dependent Taylor expansion to obtain a satisfactory accuracy when the wavelength gets close to the lattice spacing.Such a wavelength-dependent Taylor expansion is applied to the displacement field of the diatomic lattice,resulting in a novel SG model.For various kinds of diatomic lattices,the dispersion diagrams given by the proposed SG model always agree well with those given by the discrete model throughout the first Brillouin zone,manifesting the robustness of the present model.Based on this SG model,we have conducted the following discussions.(Ⅰ)Both mass and stiffness ratios affect the band gap structures of diatomic lattice metamaterials,which is very helpful for the design of metamaterials.(Ⅱ)The increase in the SG order can enhance the model performance if the modified Taylor expansion is adopted.Without doing so,the higher-order continuum model can suffer from a stronger instability issue and does not necessarily have a better accuracy.The proposed SG continuum model with the eighth-order truncation is found to be enough to capture the dispersion behaviors all over the first Brillouin zone.(Ⅲ)The effects of the nonlocal interactions are analyzed.The nonlocal interactions reduce the workable range of the well-known long-wave approximation,causing more local extrema in the dispersive diagrams.The present model can serve as a satisfactory continuum theory when the wavelength gets close to the lattice spacing,i.e.,when the long-wave approximation is no longer valid.For the convenience of band gap designs,we have also provided the design space from which one can easily obtain the proper mass and stiffness ratios corresponding to a requested band gap width. | Binying WANG Jinxing LIU A.K.SOH Naigang LIANG | 2022 | Applied Mathematics and Mechanics(English Edition)2022，43，1： | 1 |
| 6 | A physical mechanism based investigation on the elasto-plastic-damage behavior of anisotropic aluminum alloys under finite deformation显示文摘The elasto-plastic-damage behavior of anisotropic aluminum alloys is investigated under finite deformation using a physical mechanism based constitutive model.With an application to the structural calculation,the present model is used to describe and analyze the mechanical response of anisotropic 6260-T6 aluminum alloy extrusions.For the tensile specimens extracted along three different material orientations from the extruded aluminum profile,twelve simulations are carried out covering four different specimen geometries.The simulation results in force-displacement response and central logarithmic axial strain evolution are compared with experimental results.From the comparisons,it can be concluded that the present model has the capacity to describe the behavior of anisotropic material.From the force-displacement curves,the anisotropy is observed in different material orientations,and the physical mechanism of anisotropy is analyzed. | CHEN Cen LIANG NaiGang LIU Fang FU Qiang | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员