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Search Results: 1 - 10 of 300102 matches for " Pu J "
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Financial Innovation and Aggregate Risk Sharing  [PDF]
Rodrigo J. Hernandez, Pu Liu, Yingying Shao
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.811143
Abstract: In this paper we examine the impact of financial innovations on real economy. Based on data for US banks’ off-balance sheet activities from 1995 to 2013, we investigate aggregate risk sharing in two different channels: Personal consumption smoothening and personal income insurance. The results show that the use of financial innovations contributes to a reduction in the exposure of personal income and consumption to state-specific economic shocks, and the results suggest a positive role played by financial innovations in real economy.
Strategy & Techniques for Restoration of Healthy Aquaecosystem from Toxic Super Eutrophic Water Body  [PDF]
Peimin Pu, Jiangping Pu
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.36009
Abstract:

There are complex river-lake systems in the Taihu Lake catchment with total water surface area of 6174.7 km2, and population density of 1079/km2, including Taihu Lake water surface area of 2338 km2. The water systems in this catchment have healthy aquaecosystems during long history. However, in some riverlets in this catchment the water quality was estimated as “acute toxicity for higher organisms” and over standards for many heavy metal elements content; there were no any living plants and macro organisms in the water body, because there were developed a series of industry with abundant release of heavy metals and difficult decomposition organic chemical components along the riverlets during last decades. The even more serious situation was observed in sediments of the riverlets. How to restore such riverlet into a healthy aquaeosystem with abound plants and higher organisms? The main strategy and techniques are described in this paper as summarizing a report of engineering in a riverlet in Wuxi New District during last years, which leads to restore the aquaecosystem into a healthy one with abundant surface plant cultured on floating islands and observed living fish, lobster, frog, toad, mollusk and others in the riverlet. The main techniques are: 1) softwall buffer technic; 2) floating eco-island technic by using which can culture any plant which can be cultured in solution; 3) immobilized nitrogen cycle bacteria (INCB) technic; 4) tattering esters and other big-molecule organic chemicals by using electronic pulse technic and photosensitization technic; 5) mist spray facility technic for improving dissolved oxygen in deep water layers; 6) technic for buffering and suppressing H2S release from water; 7) the appropriate portion of surface with cultured plant to the total water surface area is about 1/3; 8) Cress [Oenanthe Ljavanica (Bl.) DC.] and Myriophyllum verticilatum L. may be cultured in Taihu Lake catchment during the whole year as main plants with mosaic combination of other supplement plants in different seasons.

Research on College Students’ Conformity in Sports  [PDF]
Pu Liu
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.73045
Abstract: As a social member, college student will inevitably be influenced by the other students and the society as a whole. Conformity is a psychological term that indicates the influence. It means that an individual tends to keep accordance with the majority under direction or pressure. Conformity is a common phenomenon among college students when they are having PE class or playing sports after class, which has a great effect on students’ physical activities, sport attitude and philosophy of life. This paper analyzes the effects of conformity on college students in sports and gives some practical suggestions to PE instructors about how to make use of conformity to help students change their attitude to sports and form lifelong sports habit.
Exact Boundary Critical Exponents and Tunneling Effect in Integrable Models for Quantum Wires
Y. Wang,J. Voit,F. -C. Pu
Physics , 1996, DOI: 10.1103/PhysRevB.54.8491
Abstract: Using the principles of the conformal quantum field theory and the finite size corrections of the energy of the ground and various excited states, we calculate the boundary critical exponents of single- and multicomponent Bethe ansatz soluble models. The boundary critical exponents are given in terms of the dressed charge matrix which has the same form as that of systems with periodic boundary conditions and is uniquely determined by the Bethe ansatz equations. A Luttinger liquid with open boundaries is the effective low-energy theory of these models. As applications of the theory, the Friedel oscillations due to the boundaries and the tunneling conductance through a barrier are also calculated. The tunneling conductance is determined by a nonuniversal boundary exponent which governs its power law dependence on temperature and frequency.
On the calculation of diffusion coefficients in confined fluids and interfaces with an application to the liquid-vapor interface of water
Pu Liu,Edward Harder,B. J. Berne
Physics , 2003,
Abstract: We propose a general methodology for calculating the self-diffusion tensor from molecular dynamics for a liquid with a liquid-gas or liquid-solid interface. The standard method used in bulk fluids, based on computing the mean square displacement as a function of time and extracting the asymptotic linear time dependence from this, is not valid for systems with interfaces or for confined fluids. The method proposed here is based on imposing virtual boundary conditions on the molecular system and computing survival probabilities and specified time correlation functions in different layers of the fluid up to and including the interfacial layer. By running dual simulations, one based on MD and the other based on Langevin dynamics, using the same boundary conditions, one can fit the Langevin survival probability at long times to the MD computed survival probability, thereby determining the diffusion coefficient as a function of distance of the layers from the interface. We compute the elements of the diffusion tensor of water as a function of distance from the liquid vapor interface of water. Far from the interface the diffusion tensor is found to be isotropic, as expected, and the diffusion coefficient has the value $D\approx$ .22\AA$^2$/psec in agreement with what is found in the bulk liquid. In the interfacial region the diffusion tensor is axially anisotropic, with values of $D_{\parallel}\approx$. 8\AA$^2$/psec and $D_{\perp}\approx$. 5\AA$^2$/psec for the components parallel and normal the interface surface respectively. We also show that diffusion in confined geometries can be calculated by imposing appropriate boundary conditions on the molecular system and computing time correlation functions of the eigenfunctions of the diffusion operator corresponding to the same boundary conditions.
Study on the Influencing Factors and Countermeasures of Supply and Demand Balance in Real Estate Market in Dazhou  [PDF]
Xiaomei Pu, Lin Tian, Aili Pu
Open Journal of Business and Management (OJBM) , 2018, DOI: 10.4236/ojbm.2018.63041
Abstract: Taking supply and demand of real estate market in Dazhou as an example, this paper obtains the main factors affecting the supply of real estate market by interviews and consulting relevant information. Through questionnaire and further analysis, the main factors affecting the demand of real estate market are brought forward. Countermeasures are then proposed to achieve the balance between supply and demand as well as stable and healthy development of Dazhou’s real estate market.
An Efficient α-Phosphoryloxylation of Ketones  [PDF]
Ye Pu, Jie Yan
International Journal of Organic Chemistry (IJOC) , 2011, DOI: 10.4236/ijoc.2011.11001
Abstract: An efficient α-phosphoryloxylation of ketones has been developed. When ketones were treated with (diace-toxyiodo)benzene and phosphates in CH2Cl2 at room temperature, the α-phosphoryloxylaction of ketones was easily be carried out, providing the ketol phosphates in good yields.
Numerical Calculation of Dynamic Response for Multi-Span Non-Uniform Beam Subjected to Moving Mass with Friction  [PDF]
Junping Pu, Peng Liu
Engineering (ENG) , 2010, DOI: 10.4236/eng.2010.25048
Abstract: In order to simulate the coupling vibration of a vehicle or train moves on a multi-span continuous bridge with non-uniform cross sections, a moving mass model is used according to the Finite Element Method, the effect of the inertial force, Coriolis force and centrifugal force are considered by means of the additive matrices. For a non-uniform rectangular section beam with both linear and parabolic variable heights in a plane, the stiffness and mass matrices of the beam elements are presented. For a non-uniform box girder, Romberg numerical integral scheme is adopted, each coefficient of the stiffness matrix is obtained by means of a normal numerical computation. By applying these elements to calculate the non-uniform beam, the computational accuracy and efficiency are improved. The finite element method program is worked out and an entire dynamic response process of the beam with non-uniform cross sections subjected to a moving mass is simulated numerically, the results are compared to those previously published for some simple examples. For some complex multi-span bridges subjected to some moving vehicles with changeable velocity and friction, the computational results, which can be regarded as a reference for engineering design and scientific research, are also given simultaneously.
Dynamic Response Analysis of Beams with Oblique Collision  [PDF]
Junping Pu, Yandong Chi
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.37095
Abstract: Adopting a dynamic contact numerical method, some problems such as the central collision, transverse collision and oblique collision between two beams are researched. Numerical expressions for these cases are deduced. Using a self-developed finite element program some examples are computed, and compared with the analytical solution of the central collision, this numerical algorithm is proved to be reliable. For the other numerical results that have no analytical solution to be used to compare with, they are also reasonable through the theoretical analysis. For the transverse and oblique collision, the ideal results can be obtained by using a smaller time step.
Sound Card Based ASK Communication System for Teaching Communication Principle Course  [PDF]
Ming Jin, Yang Pu
Communications and Network (CN) , 2013, DOI: 10.4236/cn.2013.51B018
Abstract: This paper deals with the issue of using the MATLAB tool in teaching the course of communication principles via constructing an Amplitude Shift Keying (ASK) communication system. Different from conventional MATLAB based simulations, the constructed system transmits modulated signals through a wire audio channel by exploiting sound card. Synchronization is required before the received signal being demodulated. Many practical problems should be considered as in real system. The designed system can be extended easily, and not only stimulates students’ interest in communication course, but also helps them understanding the principles from system viewpoints.
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