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Search Results: 1 - 10 of 31706 matches for " REN Bo "
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Interaction solutions for mKP equation with nonlocal symmetry reductions and CTE method
Bo Ren
Physics , 2014, DOI: 10.1088/0031-8949/90/6/065206
Abstract: The nonlocal symmetries for the modified Kadomtsev-Petviashvili (mKP) equation are obtained with the truncated Painleve method. The nonlocal symmetries can be localized to the Lie point symmetries by introducing auxiliary dependent variables. The finite symmetry transformations and similarity reductions related with the nonlocal symmetries are computed. The multi-solitary wave solution and interaction solutions among a soliton and the cnoidal waves of the mKP equation are presented. In the meanwhile, the consistent tanh expansion (CTE) method is applied to the mKP equation. The explicit interaction solutions among a soliton and other types of nonlinear waves such as the cnoidal periodic waves and multiple resonant soliton solutions are given.
Interaction solutions for supersymmetric mKdV-B equation
Bo Ren
Physics , 2015,
Abstract: The ${\cal N} =1$ supersymmetric mKdV-B system is transformed to a system of coupled bosonic equations by using the bosonization approach. The bosonized supersymmetric mKdV-B (BSmKdV-B) equation can be solved by the usual mKdV equation together with a linear differential equations without fermionic variables. The bosonization approach can thus effectively avoid difficulties caused by anticommutative fermionic fields of the supersymmetric systems. The consistent tanh expansion (CTE) method is applied to the BSmKdV-B equation. An auto-B\"{a}cklund (BT) theorem is obtained by using CTE method. The interaction solutions among solitons and other complicated waves including Painlev\'{e} waves and periodic cnoidal waves are given through an auto-BT theorem. For the soliton-cnoidal interaction solution, two concrete cases are investigated both in analytical and graphical ways by combining the mapping and deformation method.
RETRACTED: Coupling Numerical Simulation and Field Experiment to Optimize Vegetation Arrangement for Pleasant Outdoor Wind Environment in Residential District  [PDF]
Bo Hong, Fang Chen, Peng Ren
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.64037
Abstract: Short Retraction Notice

The paper does not meet the standards of \"Journal of Environmental Protection\".

This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.

Editor guiding this retraction: Prof. Qingren Wang (EiC of JEP)

The full retraction notice in PDF is preceding the original paper, which is marked \"RETRACTED\".
Painleve properties and exact solutions for the high-dimensional Schwartz Boussinesq equation

Ren Bo,Lin Ji,

中国物理 B , 2009,
Abstract: The usual (1+1)-dimensional Schwartz Boussinesq equation is extended to the (1+1)-dimensional space--time symmetric form and the general ($nThe usual (1+1)-dimensional Schwartz Boussinesq equation is extended to the (1+1)-dimensional space--time symmetric form and the general ($n$+1)-dimensional space--time symmetric form. These extensions are Painlev\'e integrable in the sense that they possess the Painlev\'e property. The single soliton solutions and the periodic travelling wave solutions for arbitrary dimensional space--time symmetric form are obtained by the Painlev\'e--B\"acklund transformation.
Probing Lee-Yang zeros and coherence sudden death
Bo-Bo Wei,Ren-Bao Liu
Physics , 2012, DOI: 10.1103/PhysRevLett.109.185701
Abstract: As a foundation of statistical physics, Lee and Yang in 1952 proved that the partition functions of thermal systems can be zero at certain points (called Lee-Yang zeros) on the complex plane of temperature. In the thermodynamic limit, the Lee-Yang zeros approach to real numbers at the critical temperature. However, the imaginary Lee-Yang zeros have not been regarded as experimentally observable since they occur at imaginary field or temperature, which are unphysical. Here we show that the coherence of a probe spin weakly coupled to a many-body system presents zeros as a function of time that are one-to-one mapped to the Lee-Yang zeros of the many-body system. In the thermodynamic limit, of which the Lee-Yang zeros form a continuum, the probe spin coherence presents a sudden death at the edge singularities of the Lee-Yang zeros. By measuring the probe spin coherence, one can directly reconstruct the partition function of a many-body system. These discoveries establish a profound relation between two most fundamental quantities in the physical world, time and temperature, and also provide a universal approach to studying interacting many-body systems through measuring coherence of only one probe spin (or one qubit in quantum computing).
Gaseous and Electrochemical Hydrogen Storage Properties of Nanocrystalline Mg2Ni-Type Alloys Prepared by Melt Spinning  [PDF]
Zhihong Ma, Bo Li, Huiping Ren, Zhonghui Hou, Guofang Zhang, Yanghuan Zhang
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.23018
Abstract: A partial substitution of Ni by Cu has been carried out in order to improve the hydrogen storage characteristics of the Mg2Ni-type alloys. The nanocrystalline Mg20Ni10-xCux (x = 0, 1, 2, 3, 4) alloys are synthesized by the melt-spinning technique. The structures of the as-cast and spun alloys have been characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and high resolution transmission electron microscope (HRTEM). The electrochemical performances were evaluated by an automatic galvanostatic system. The hydrogen absorption and desorption kinetics of the alloys were determined by using an automatically controlled Sieverts apparatus. The results indicate that the substitution of Cu for Ni does not alter the major phase Mg2Ni. The Cu substitution significantly ameliorates the electrochemical hydrogen storage performances of alloys, involving both the discharge capacity and the cycle stability. The hydrogen absorption capacity of alloys has been observed to be first increase and then decrease with an increase in the Cu contents. However, the hydrogen desorption capacity of the alloys exhibit a monotonous growth with an increase in the Cu contents.
Stem Cells for Cardiac Repair: Status, Mechanisms, and New Strategies
Ren Mingliang,Zhang Bo,Wang Zhengguo
Stem Cells International , 2011, DOI: 10.4061/2011/310928
Abstract: Faced with the end stage of heart disease, the current treatments only slow worsening of heart failure. Stem cells have the potential of self-renewal and differentiation. It is expected to replace and repair damaged myocardium. But many clinical trials have shown that the stem cell therapy of heart failure is modest or not effective. The possible causes for the limited effects of stem cell in curing heart failure are the stem cells which have been transplanted into the ischemic heart muscle may suffer low survival rate, affected by inflammatory molecules, proapoptotic factor, and lack of nutrients and oxygen, and then the stem cells which home and have been completely transplanted to the site of myocardial infarction become very small. Therefore, through preconditioning of stem cells and appropriate choice of genes for mesenchymal stem cell modification to improve the survival rate of stem cells, ability in homing and promoting angiogenesis may become the newly effective strategies for the application of stem cells therapy in heart failure. 1. Introduction With the changes in lifestyle and aging of population, the morbidity of hypertension, coronary heart disease, and other common cardiovascular disease has shown a continuous rising tendency. As the end stage of cardiovascular disease, heart failure suffers high morbidity and poor prognosis. Heart failure was mentioned on 277?193 death certificates and was the underlying cause in 56 565 of those deaths in the United States in 2007 [1, 2]. According to a random sampling survey to 15,518 residents aging from 35 to 74 in China in 2003, the prevalence of heart failure was 0.9%. It was lower than developed countries. However, the total prevalence was still up to 4,000,000, and the incidence was increasing ceaselessly [3]. Current drug treatment can only improve symptoms without preventing the ventricular remodeling and the deterioration of progressive heart function. Heart transplantation is an effective means of treating patients with heart failure. But the vast majority of patients are restricted by the age, the donor, surgical complications, medical costs, and so forth. Stem cells are the origin cells of various mature cells. They have the potential of self-renewal and differentiation. Either immediately after isolation or after expansion in vitro, stem cells are transplanted into a specific region of the heart, and ultimately replace, repair the myocardial necrosis or pathological cells; then the aim of curing heart failure can be achieved and it has brought a bright prospect for the treatment of heart
Communication Research and Reliability Testion for Emedded Software System
嵌入式软件可靠性测试系统及其通信研究

REN Hong-Bo,
任洪波

计算机科学 , 2007,
Abstract: The traditiioal testion system for embedded software system,either a single computer structure or distributed structure,has some problems in data communication while it rtests the reliability of an embedded software system for a long period of time and/or a large scale.This paper introduces a new testing prototyupe for embedded software systems with atar topology structure.The prototype is researched based on the properties of real time communication,delay addurance for embedded software sysyem and exchange Ethernet,which is widely adopted in the areas of national defense,communication,aviation.
A Distributed Routing Algorithm for LEO Networks
LEO卫星网络中的一种分布式路由算法

REN Hong-Bo,
任洪波

计算机科学 , 2007,
Abstract: Due to high-speed movement of satellites around the regions, the dynamic topology of LEO satellite networks and earth and temporal variation of traffic intensity in certain variable traffic load in different satellite coverage areas pose special requirements to routing in ISL segment of network. Considering inherent characteristic of LEO satellite networks, a compressed path information based distributed routing algorithm is proposed in this paper. The algorithm can support multi-path routing capability without introducing additional signal overhead by using a distributed hierarchical link state collection policy and a compact path information coding scheme, so as to realize traffic load balancing and optimize utilization of costly spatial network resources.
Death Line of Gamma-ray Pulsars with Outer Gaps
Ren-Bo Wang,Kouichi Hirotani
Physics , 2011, DOI: 10.1088/0004-637X/736/2/127
Abstract: We analytically investigate the condition for a particle accelerator to be active in the outer magnetosphere of a rotation-powered pulsar. Within the accelerator (or the gap), magnetic-field-aligned electric field accelerates electrons and positrons, which emit copious gamma-rays via curvature process. If one of the gamma-rays emitted by a single pair materializes as a new pair on average, the gap is self-sustained. However, if the neutron-star spin-down rate decreases below a certain limit, the gap becomes no longer self-sustained and the gamma-ray emission ceases. We explicitly compute the multiplicity of cascading pairs and find that the obtained limit corresponds to a modification of previously derived outer-gap death line. In addition to this traditional death line, we find another death line, which becomes important for millisecond pulsars, by separately considering the threshold of photon-photon pair production. Combining these traditional and new death lines, we give predictions on the detectability of gamma-ray pulsars with Fermi and AGILE. An implication on the X-ray observations of heated polar-cap emission is also discussed.
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