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您的检索式：作者名="Conghai Zhao"
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| 1 | Viscoelastic evaluation of fetal umbilical vein for reconstruction of middle cerebral artery显示文摘The transplantation of artificial blood vessels with < 6 mm inner diameter as substitutes for human arterioles or veins has not achieved satisfactory results.Umbilical vein has been substituted for artery in vascular transplantation,but it remains unclear whether the stress relaxation and creep between these vessels are consistent.In this study,we used the fetal umbilical vein and middle cerebral artery from adult male cadavers to make specimens 15 mm in length,0.196–0.268 mm in tunica media thickness,and 2.82–2.96 mm in outer diameter.The results demonstrated that the stress decrease at 7 200 seconds was similar between the middle cerebral artery and fetal umbilical vein specimens,regardless of initial stress of 18.7 kPa or 22.5 kPa.However,the strain increase at 7 200 seconds of fetal umbilical veins was larger than that of middle cerebral arteries.Moreover,the stress relaxation experiment showed that the stress decrease at 7 200 seconds of the fetal umbilical vein and middle cerebral artery specimens under 22.5 kPa initial stress was less than the decrease in these specimens under 18.7 kPa initial stress.These results indicate that the fetal umbilical vein has appropriate stress relaxation and creep properties for transplantation.These properties are advantageous for vascular reconstruction,indicating that the fetal umbilical vein can be transplanted to repair middle cerebral artery injury. | Dongyuan Li Donghui Xu Peng Li Jun Wei Kun Yang Conghai Zhao | 2013 | Neural Regeneration Research2013，8，32： | 3 |
| 2 | Comparison of viscoelasticity between normal human sciatic nerve and amniotic membrane显示文摘Sciatic nerve tissue was obtained from the gluteus maximus muscle segment of normal human cadavers and amniotic membrane tissue was obtained from healthy human puerperant placentas.Both tissues were analyzed for their stress relaxation and creep properties to determine suitability for transplantation applications.Human amniotic membrane and sciatic nerve tissues had similar tendencies for stress relaxation and creep properties.The stress value of the amniotic membrane stress relaxation group decreased to a greater extent compared with the sciatic nerve stress relaxation group.Similarly,the stress value of the amniotic membrane creep group increased to a greater extent compared with the sciatic nerve creep group.The stress relaxation curve for human amniotic membrane and sciatic nerve showed a logarithm correlation,while the creep curve showed an exponential correlation.These data indicate that amniotic membrane tissue has better stress relaxation and creep properties compared with sciatic nerve tissue. | Donghui Xu Conghai Zhao Huili Ma Jun Wei Dongyuan Li | 2013 | Neural Regeneration Research2013，8，14： | 1 |
| 3 | A Fifth-Order Low-Dissipative Conservative Upwind Compact Scheme Using Centered Stencil显示文摘In this paper,a conservative fifth-order upwind compact scheme using centered stencil is introduced.This scheme uses asymmetric coefficients to achieve the upwind property since the stencil is symmetric.Theoretical analysis shows that the proposed scheme is low-dissipative and has a relatively large stability range.To maintain the convergence rate of the whole spatial discretization,a proper non-periodic boundary scheme is also proposed.A detailed analysis shows that the spatial discretization implemented with the boundary scheme proposed by Pirozzoli[J.Comput.Phys.,178(2001),pp.81–117]is approximately fourth-order.Furthermore,a hybridmethodology,coupling the compact scheme with WENO scheme,is adopted for problems with discontinuities.Numerical results demonstrate the effectiveness of the proposed scheme. | Conghai Wu Sujuan Yang Ning Zhao | 2014 | Advances in Applied Mathematics and Mechanics2014，6，6： | 0 |
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