Smooth muscle cells can work properly over a large length range,drastic reorganization of the cytoskeletal structure has to occur,but the mechanism behind the process of cytoskeleton reorganization of smooth muscle is...Smooth muscle cells can work properly over a large length range,drastic reorganization of the cytoskeletal structure has to occur,but the mechanism behind the process of cytoskeleton reorganization of smooth muscle is still poorly understood,especially with respect to unique problem of maintaining force generation and transmission within the confine of an ever-changing cytoskeleton in smooth muscle.Using a cytoskeletal preparation derived from skinned airway smooth muscle,we aimed at separating the contribution of actomyosin interaction and elucidating the cytoskeletal stiffness in smooth muscle.The results indicate that there is a Ca++de-展开更多
This paper piled some key experiments related with theoreticalresearch of mechanism on high T_c superconductivity and pointed out theimportance of experimental research to present raw data for theoreticalresearch of m...This paper piled some key experiments related with theoreticalresearch of mechanism on high T_c superconductivity and pointed out theimportance of experimental research to present raw data for theoreticalresearch of mechanism on high T_c superconductivity.展开更多
An isolated slit was placed in a single box girder to obtain passive leading-edge suction and trailing-edge jet flow to control the unsteady aerodynamic force and modify the flow structure.The Great Belt East Bridge w...An isolated slit was placed in a single box girder to obtain passive leading-edge suction and trailing-edge jet flow to control the unsteady aerodynamic force and modify the flow structure.The Great Belt East Bridge was used as a physical model at a geometric scale of 1:125.Wind tunnel experiments were conducted at an incoming airflow speed of 10 m/s,and the Reynolds number was calculated as 2.3×104 using the test model height and wind speed.The surface pressure distribution was measured,and the aerodynamic force acting on the test model with and without the isolated slit was calculated by integrating the pressure result.It was found that the control using an isolated slit can dramatically decrease the fluctuating surface pressure distribution and aerodynamic force.An analysis on the power spectral density of the lift force revealed that the isolated slit accelerated vortex shedding.Moreover,high-speed particle image velocimetry was used to investigate the wake flow structure behind the test model.A vortex separated from the upper surface was pushed to a lower location and the wake flow structure was modified by the isolated slit.A proper orthogonal decomposition(POD)of the flow field showed that the first two POD modes in the controlled case contributed less energy than those in the uncontrolled case,indicating that more energy was transferred to higher modes,and small-scale vortices had more energy.A secondary instability structure was found in the wake flow for a nondimensional jet momentum coefficient J of 0.0667.展开更多
基金supported by National Natural Science Foundation of China(11172340)Training Program for Hundreds of Distinguished Leading Scientists of ChongqingSpecialized Research Fund for the Doctoral Program of Higher Education of China(20120191120032)
文摘Smooth muscle cells can work properly over a large length range,drastic reorganization of the cytoskeletal structure has to occur,but the mechanism behind the process of cytoskeleton reorganization of smooth muscle is still poorly understood,especially with respect to unique problem of maintaining force generation and transmission within the confine of an ever-changing cytoskeleton in smooth muscle.Using a cytoskeletal preparation derived from skinned airway smooth muscle,we aimed at separating the contribution of actomyosin interaction and elucidating the cytoskeletal stiffness in smooth muscle.The results indicate that there is a Ca++de-
文摘This paper piled some key experiments related with theoreticalresearch of mechanism on high T_c superconductivity and pointed out theimportance of experimental research to present raw data for theoreticalresearch of mechanism on high T_c superconductivity.
基金Projects(51978222,51722805,U2106222) supported by the National Natural Science Foundation of ChinaProject(HIT.BRETIV 201803) supported by the Fundamental Research Funds for the Central Universities,China。
文摘An isolated slit was placed in a single box girder to obtain passive leading-edge suction and trailing-edge jet flow to control the unsteady aerodynamic force and modify the flow structure.The Great Belt East Bridge was used as a physical model at a geometric scale of 1:125.Wind tunnel experiments were conducted at an incoming airflow speed of 10 m/s,and the Reynolds number was calculated as 2.3×104 using the test model height and wind speed.The surface pressure distribution was measured,and the aerodynamic force acting on the test model with and without the isolated slit was calculated by integrating the pressure result.It was found that the control using an isolated slit can dramatically decrease the fluctuating surface pressure distribution and aerodynamic force.An analysis on the power spectral density of the lift force revealed that the isolated slit accelerated vortex shedding.Moreover,high-speed particle image velocimetry was used to investigate the wake flow structure behind the test model.A vortex separated from the upper surface was pushed to a lower location and the wake flow structure was modified by the isolated slit.A proper orthogonal decomposition(POD)of the flow field showed that the first two POD modes in the controlled case contributed less energy than those in the uncontrolled case,indicating that more energy was transferred to higher modes,and small-scale vortices had more energy.A secondary instability structure was found in the wake flow for a nondimensional jet momentum coefficient J of 0.0667.
