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Search Results: 1 - 10 of 120129 matches for " Yongjiu Wang "
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Nonstatic solution of Dilaton-Maxwell compound field and Hawking radiation of its black hole
Xinlian Luo,Yongjiu Wang
Chinese Science Bulletin , 1997, DOI: 10.1007/BF03186965
Abstract:
The Obstacle Factors of the Service Rural Grassroots Party Organization and the Measures Analysis - Based on the Angle of the Mass View of Marxism
Yongjiu Shu,Rui Wang
Journal of Politics and Law , 2013, DOI: 10.5539/jpl.v6n1p80
Abstract: The mass view is the core and the soul of the Marxist historical materialism, which is also the basic point of Marxism sinicization. From the perspective of the mass view of Marxism, anglicising the barrier factors such as service environment problems, service consciousness, and service system obstacles during our construction of service-oriented grass-roots party. What’s more?through enhancing service consciousness, raising the service ability?constructing the service platform, and establishing long-term service mechanism,etc to solve the obstacles?which have great theoretical significance and practical significance in insisting on and developing mass views and building the socialist harmonious society.
Timelike Geodesic Motion in Horava-Lifshitz Spacetime
Juhua Chen,Yongjiu Wang
Physics , 2009, DOI: 10.1142/S0217751X10048962
Abstract: Recently Ho$\breve{r}$ava proposed a non-relativistic renormalisable theory of gravitation. When restricted to satisfy the condition of detailed balance, this theory is intimately related to topologically massive gravity in three dimensions, and the geometry of the Cotton tensor. At long distances, this theory is expected to flow to the relativistic value $\lambda = 1$, and could therefore serve as a possible candidate for a UV completion of Einstein general relativity or an infrared modification thereof. In this paper under allowing the lapse function to depend on the spatial coordinates $x^i$ as well as $t$, we obtain the spherically symmetric solutions. And then by analyzing the behavior of the effective potential for the particle, we investigate the timelike geodesic motion of particle in the Ho$\breve{r}$ava-Lifshitz spacetime. We find that the nonradial particle falls from a finite distance to the center along the timelike geodesics when its energy is in an appropriate range. However, we find that it is complexity for radial particle along the timelike geodesics. There are follow different cases due to the energy of radial particle: 1) When the energy of radial particle is higher than a critical value $E_{C}$, the particle will fall from infinity to the singularity directly; 2) When the energy of radial particle equals to the critical value $E_{C}$, the particle orbit is unstable at $r=r_{C}$, i.e. the particle will escape from $r=r_{C}$ to the infinity or to the singularity, which is determined by the initial conditions of the particle; 3) When the energy of radial particle is in a proper range, the particle will rebound to the infinity or plunge to the singularity from a infinite distance, which is also determined by the initial conditions of the particle.
Evolution of the interacting viscous dark energy model in Einstein cosmology
Juhua Chen,Yongjiu Wang
Physics , 2009,
Abstract: In this paper we investigate the evolution of the viscous dark energy (DE) interacting with the dark matter (DM) in the Einstein cosmology model. Using the linearizing theory of the dynamical system, we find, in our model, there exists a stable late time scaling solution which corresponds to the accelerating universe, and we also find the unstable solution under some appropriate parameters. In order to alleviate the coincidence problem, some authors considered the effect of quantum correction due to the conform anomaly and the interacting dark energy model. But if we take into account the bulk viscosity of the cosmic fluid, the coincidence problem will be softened just like the interacting dark energy cosmology model. That's to say, both the non-perfect fluid model and the interacting models of the dark energy can alleviate or soften the singularity of the universe.
Quasinormal Modes of Scalar Field in Five-dimensional Lovelock Black Hole Spacetime
Juhua Chen,Yongjiu Wang
Physics , 2009, DOI: 10.1088/1674-1056/19/6/060401
Abstract: In this paper using the third-order WKB approximation, a numerical method devised by Schutz, Will and Iyer, we investigate the quasinormal frequencies of the scalar field in the background of five-dimensional Lovelock black hole. We find that the ultraviolet correction to Einstein theory in the Lovelock theory makes the scalar field decay more slowly and makes the scalar field oscillate more quickly, and the cosmological constant makes the scalar field decay more slowly and makes the scalar field oscillate more slowly in Lovelock black hole backgroud. On the other hand we also find that quasinormal frequencies depend very weakly on the angular quantum number $l$.
Clinical Report on Pharmacological Prevention of Deep Vein Thrombosis after Radical Resection of Abdominal Tumors  [PDF]
Liang He, Jiang Wang, Lin Nan, Bin Yan, Yongjiu Zhang
International Journal of Clinical Medicine (IJCM) , 2014, DOI: 10.4236/ijcm.2014.51006
Abstract:

Aim: The aim of this paper is to summarize the experience and results of deep vein thrombosis prevention after standardized abdominal tumor resection and lymph node dissection, and to investigate standardized treatment methods for postoperative thrombosis prevention. Methods: We performed a retrospective analysis of the clinical data for 548 patients who were given low molecular weight heparin, low molecular weight dextran, or IV salvia to prevent thrombosis development between January 2007 and April 2010 after standardized abdominal tumor resection and lymph node dissection. Patients were divided into the following three groups based on the treatment period and treatment schedule: group 1 included 163 patients who had been treated between January 2007 and March 2008 and received a 7-day course of daily low molecular weight dextran (500 mL) and salvia injection (0.2 g) postoperatively; group 2 included 149 patients who had been treated between April 2008 and March 2009 and received a 7-day course of daily low molecular weight dextran (500 mL), salvia injection (0.2 g), and low molecular weight heparin (40 mg) postoperatively; group 3 included 236 patients who had been treated between April 2009 and April 2010 and postoperatively received a 7-day course of daily low molecular weight dextran (500 mL) and salvia injection (0.2 g), and on postoperative day 3 were started on an additional 7-day course of daily low molecular weight heparin (40 mg). Then, we performed comparative analysis of the treatment efficacy and concomitant symptoms. Results: In group 1, 64 of the 163 cases (39.3%) were positive for D-dimer, and 15 (9.2%) cases were positive for DVT based on Doppler imaging of the lower extremities. In group 2, 38 cases (25.5%) were positive for D-dimer and 3 cases (2.0%) for DVT. In group 3, 62 cases (26.3%) were positive for D-dimer and 6 cases (2.5%) for DVT. In general, the administration of low molecular weight heparin for anticoagulation in groups 2 and 3 led to significant reduction of thromboses when compared to group 1. However, altering the initiation day of low molecular weight heparin administration between groups 2 and 3 did not result in significant differences in the rate of thrombosis formation. Through clinical observation, early administration of low molecular weight heparin may increase adverse effects. Conclusion: We have demonstrated the superior efficacy of postoperative administration of low molecular weight dextran and IV salvia with additional subcutaneous injection of low molecular

Sensitivity of the Carbon Storage of Potential Vegetation to Historical Climate Variability and CO2 in Continental China

MAO Jiafu,WANG Bin,DAI Yongjiu,

大气科学进展 , 2009,
Abstract: The interest in the national levels of the terrestrial carbon sink and its spatial and temporal variability with the climate and CO2 concentrations has been increasing. How the climate and the increasing atmospheric CO2 concentrations in the last century affect the carbon storage in continental China was investigated in this study by using the Modified Sheffield Dynamic Global Vegetation Model (M-SDGVM). The estimates of the M-SDGVM indicated that during the past 100 years a combination of increasing CO2 with historical temperature and precipitation variability in continental China have caused the total vegetation carbon storage to increase by 2.04 Pg C, with 2.07 Pg C gained in the vegetation biomass but 0.03 Pg C lost from the organic soil carbon matter. The increasing CO2 concentration in the 20th century is primarily responsible for the increase of the total potential vegetation carbon. These factorial experiments show that temperature variability alone decreases the total carbon storage by 1.36 Pg C and precipitation variability alone causes a loss of 1.99 Pg C. The effect of the increasing CO2 concentration alone increased the total carbon storage in the potential vegetation of China by 3.22 Pg C over the past 100 years. With the changing of the climate, the CO2 fertilization on China's ecosystems is the result of the enhanced net biome production (NBP), which is caused by a greater stimulation of the gross primary production (GPP) than the total soil-vegetation respiration. Our study also shows notable interannual and decadal variations in the net carbon exchange between the atmosphere and terrestrial ecosystems in China due to the historical climate variability.
The Great Open-minded Thinking by Deng Xiaoping and Its Contemporary Significance
Yongjiu Shu,Qingfei Zhai,Rui Wang
Asian Social Science , 2013, DOI: 10.5539/ass.v9n3p202
Abstract: The major decision of Deng Xiaoping's Reform and Opening up is the inevitable development of history and the choice of the Chinese people. The large Open-mindedness which is the important component of Deng Xiaoping Theory is all-around, including both external opening and internal opening. It guides the great practice of China's Reform and Opening up more than 30 years, and has obtained the great achievement which attracts worldwide attention, and is a scientific theory we have to have profound knowledge and comprehensive understanding in. Deng Xiaoping large open-mindedness which is applying Marxist stand, viewpoint and method to solve specific problems, is essentially a Marxist methodology and the important spiritual wealth of Marxism, has significance for Party building and National development in the new century.
Chaos around charged black hole with dipoles
Chen Ju-hua,Wang Yongjiu
Physics , 2002,
Abstract: We investigated dynamics of the test particle in the gravitational field of the charged black hole with dipoles in this paper. At first we have studied the gravitational potential, by the numerical simulations, we found, for appropriate parameters, that there are two different cases in the potential curve, one is a well case with a stable critical point, and the other is three wells case with three stable critical points and two unstable critical points. As consequence, the chaotic motion will rise. We have performed the evolution of the orbits of the test particle in phase space, we found that the orbits of the test particle randomly oscillate without any periods, even sensitively depend on the initial conditions and parameters. By performing Poincar\'{e} sections for different values of the parameters and initial condition, we have found regular motion and chaotic motion. By comparing these Poincar\'{e} sections, we further conformed that the chaotic motion of the test particle mainly origins from the dipoles of the black hole.
Scattering of Scalar Waves by Schwarzschild Black Hole Immersed in Magnetic Field
Juhua Chen,Hao Liao,Yongjiu Wang
Physics , 2011, DOI: 10.1140/epjc/s10052-013-2395-9
Abstract: The magnetic field is one of the most important constituents of the cosmic space and one of the main sources of the dynamics of interacting matter in the universe. The astronomical observations imply the existence of a strong magnetic fields of up to $10^4-10^8G$ near supermassive black holes in the active galactic nuclei and even around stellar mass black holes. In this paper, with the quantum scattering theory, we analysis the Schr\"{o}edinger-type scalar wave equation of black hole immersed in magnetic field and numerically investigate its absorption cross section and scattering cross section. We find that the absorption cross sections oscillate about the geometric optical value in the high frequency regime. Furthermore in low frequency regime, the magnetic field makes the absorption cross section weaker and this effect is more obviously on lower frequency brand. On the other hand, for the effects of scattering cross sections for the black hole immersed in magnetic field, we find that the magnetic field makes the scattering flux weaker and its width narrower in the forward direction. We find that there also exists the glory phenomenon along the backforward direction. At fixed frequency, the glory peak is higher and the glory width becomes narrower due to the black hole immersed in magnetic field.
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