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Search Results: 1 - 10 of 1354 matches for " Shaoping Bian "
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An optically activated cantilever using photomechanical effects in dye-doped polymer fibers
Shaoping Bian,Dirk Robinson,Mark G. Kuzyk
Physics , 2005, DOI: 10.1364/JOSAB.23.000697
Abstract: We report on what we believe is the first demonstration of an optically activated cantilever due to photomechanical effects in a dye-doped polymer optical fiber. The fiber is observed to bend when light is launched off-axis. The displacement angle monotonically increases as a function of the distance between the illumination point and the fiber axis, and is consistent with differential light-induced length changes. The photothermal and photo-reorientation mechanisms, each with its own distinct response time, are proposed to explain the observed time dependence. The measured degree of bending is consistent with a model that we have proposed which includes coupling between photoisomerization and heating. Most importantly, we have discovered that at high light intensity, a cooperative release of stress results in cis-to-trans isomerization that yields a large and abrupt length change.
Simulations of droplet dynamics using moving mesh interface tracking with adaptive meshing
Shaoping Quan
Physics , 2011,
Abstract: The dynamics of drop(s) has been simulated by the finite volume/moving mesh interface tracking method (MMIT) with adaptive mesh refining and coarsening. In MMIT, the interface is of zero thickness and moves in a Lagrangian fashion. A number of mesh refining and mesh coarsening schemes have been developed to distribute the mesh in an optimized way to achieve computing efficiency and accuracy. Three cases are displayed in this video, which include a droplet pair in tandem impulsively accelerated by a gaseous flow, a droplet moving through a convergent-divergent liquid-filled tube, and a droplet moving toward a sloped solid wall. The fluid dynamics videos of the simulations are to be presented in the Gallery of Fluid Motion, 2011.
Review of Short-Selling and Private Placement  [PDF]
Jing Bian
American Journal of Industrial and Business Management (AJIBM) , 2019, DOI: 10.4236/ajibm.2019.93037
Chinese securities market introduced the margin financing and securities trading mechanism in 2010, which is considered to be a major step forward in stabilizing the stock market. Recent scholars’ research found that the short-selling mechanism can not only stabilize the stock market, but also generate external governance effects on the company. As a high-efficiency and low-cost refinancing method, private placement has been a research hotspot of Chinese scholars since the official launch of China’s capital market in 2006, especially the transfer of interests of major shareholders in the process of private placement. Therefore, this article provides a literature review of short selling mechanisms and private placements.
A Study on the Control Technique of Construction Project Process  [PDF]
Changming Hu, Shaoping Zhang, Xueyan Wang
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.53041
The construction process control of large-scale projects is one of the difficulties and keys in the owner’s project management. Based on generalization process index, this paper proposes an approach to construction project process control. The paper elaborates on the concept and calculation of generalization process index, which, on analysis, possesses Markov property. Monthly generalization process index is regarded as a state of Markov chain, and the transition between different states is realized by computer simulation. According to the Markov process forecasting model and by means of MATLAB program, the project process forecast is realized, and the completion probability in contract period is obtained. From practical instances, it is concluded that this approach has good applicability and operability and that the obtained results can reflect the degree of project risks.
Behavior of gravity waves with limited amplitude in the vicinity of critical layer
Shaoping Wu,Fan Yi
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9341
Abstract: By using the FICE scheme, a numerical simulation of three-dimensional nonlinear propagation of gravity wave packet in a wind-stratified atmosphere is presented. The whole nonlinear propagation process of the gravity wave packet is shown; the propagation behavior of gravity waves in the vicinity of critical layer is analyzed. The results show that gravity waves encounter the critical layer when propagating in the fair winds whose velocities increase with height, and the height of critical layer propagating nonlinearly is lower than that expected by the linear gravity waves theory; the amplitudes of gravity waves increase with height as a whole before gravity waves encounter the critical layer, but the increasing extent is smaller than the result given by the linear theory of gravity waves, while the amplitudes of gravity waves reduce when gravity waves meet the critical layer; the energy of wave decreases with height, especially at the critical layer; the vertical wavelength reduces with the height increasing, but it does not become zero.
Multiscale modeling and simulation of nanotube-based torsional oscillators
Xiao Shaoping,Hou Wenyi
Nanoscale Research Letters , 2006,
Abstract: In this paper, we propose the first numerical study of nanotube-based torsional oscillators via developing a new multiscale model. The edge-to-edge technique was employed in this multiscale method to couple the molecular model, i.e., nanotubes, and the continuum model, i.e., the metal paddle. Without losing accuracy, the metal paddle was treated as the rigid body in the continuum model. Torsional oscillators containing (10,0) nanotubes were mainly studied. We considered various initial angles of twist to depict linear/nonlinear characteristics of torsional oscillators. Furthermore, effects of vacancy defects and temperature on mechanisms of nanotube-based torsional oscillators were discussed.
Droplet coalescence and breakup: Numerical simulations using moving mesh interface tracking with dynamic mesh adaptation
Shaoping Quan,Jing Lou
Physics , 2010,
Abstract: Droplet(s) breakup and coalescence have been simulated by the finite volume/moving mesh interface tracking method (MMIT) with adaptive mesh refining and coarsening. In this method, the interface is zero-thickness and moves in a Lagrangian fashion. The breakup and the coalescence of the interfaces are simulated by the mesh separation and mesh combination schemes. Three cases are displayed in this video, which include the relaxation and breakup of an initially extended droplet, two identical droplets off-center collision, and a droplet pair in a shear flow. The mesh adaptation is capable of capturing large deformations and thin regions, and the smallest length resolved is three orders of magnitude smaller than the droplet radius. The fluid dynamics videos of the simulations are to be presented in the Gallery of Fluid Motion, 2010.
Research on Molecular Diffusion Coefficient of Gas-Oil System  [PDF]
Anping Ye, Xiaoying Shen, Ping Guo, Shaoping Wang, Zhongzhao Cheng
Open Journal of Yangtze Oil and Gas (OJOGas) , 2016, DOI: 10.4236/ojogas.2016.11002
Abstract: During the process of gas injection flooding, when the gas comes into contact with oil, the mass-transfer phenomenon occurs. This changes the properties of the crude oil, improves the flow capacity, and thus enhances the oil recovery. Molecular diffusion coefficient is an important parameter to describe the mass-transfer rate of gas-oil system. At present, molecular diffusion coefficient is usually tested via indirect methods. There are 2 key points that should be noticed when testing this parameter. Firstly, select proper experimental methods. Secondly, use accurate model to describe the experimental data. In this research, the authors describe the researches on the experiment methods for determining diffusion coefficient for gas-oil system, the experiments and models on pressure decay, and the influencing factors that determine diffusion coefficient.
Geospatial Information Service Based on Ad Hoc Network  [PDF]
Fuling BIAN, Yun ZHANG
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2009, DOI: 10.4236/ijcns.2009.22013
Abstract: The mobile geospatial information service involves the domain of mobile communication, mobile computing, geospatial information service and other techniques. This paper focuses on the integration of spatial information and mobile communication technologies. The author proposes the architecture of mobile geospatial information service based on the Ad Hoc network. On the basis of this architecture, a system is developed, and applied in correlative fields.
A QoS-aware Method for Web Services Discovery  [PDF]
Bian WU, Xincai WU
Journal of Geographic Information System (JGIS) , 2010, DOI: 10.4236/jgis.2010.21008
Abstract: The non-functional QoS (quality of service) information helps us to select a proper Web-service from the web applications, by using component services such as UDDI[1](Universal Description, Discovery, and Integration) and MDS(Monitoring and Discovery System). MDS is a suite of web services to monitor and discover resources and service on Grids, but MDS only based on function aspects. This paper studies on an approach to provide the QoS information and a discovery model by using MDS and gives a system deployment and implementation plan. The simulation results show that the method is effective in service discovery.
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