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Search Results: 1 - 10 of 34858 matches for " Ming Shao "
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A Review on Agency Cost in China  [PDF]
Ming Shao, Yaxin Wang
Open Journal of Business and Management (OJBM) , 2018, DOI: 10.4236/ojbm.2018.62016
Under the modern corporate system, one of the basic problems of corporate governance is to reduce the agency cost, but it is under the influence of the company’s internal governance structure and external environment. Since agency cost problems in corporate governance have been a research hot spot, this paper teases out a profile of relevant research achievements of agency costs from 2012 to 2017 in China, and summarizes the influence factors and the economic consequences relating to agency cost in the form of literature review. After some discussion and argument, this paper analyses the trend of the existing research and puts forward the future research prospects in this field that is spillover effect of agency costs at the macro micro level.
Pion, Kaon, and (Anti-) Proton Production in Au+Au Collisions at \srt = 62.4 GeV
Ming Shao
Physics , 2004, DOI: 10.1088/0954-3899/31/4/011
Abstract: We report on preliminary results of pion, kaon, and (anti-) proton transverse momentum spectra (-0.5 < y < 0) in Au+Au collisions at $\sqrt{s_{_{NN}}}=62.4$ GeV using the STAR detector at RHIC. The particle identification (PID) is achieved by a combination of the STAR TPC and the new TOF detectors, which allow a PID coverage in transverse momentum ($p_T$) up to 7 GeV/c for pions, 3 GeV/c for kaons, and 5 GeV/c for (anti-) protons.
Analysis and Simulation of the System Dynamics Model of the Peer Production-Taking Baidu Encyclopedia as an Example  [PDF]
Zhihong Li, Ming Shao, Yu Cheng
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.31002
Abstract: Modeling the dynamical mechanism of general peer production and taking Baidu Encyclopedia as an example, the authors constructed the system dynamics model of Baidu Encyclopedia by analyzing the causality and the system flow diagram. We introduced the subsystem of the model in detail. Then, we obtained raw data by collecting data on authority media and using web crawler. Quantitative analysis was combined with experts’ advice to estimate parameters. The estimated parameters were examined. Finally, we put forward dynamical mechanism of Baidu Encyclopedia based on the results of simulating.
Spatial Variability and Stocks of Soil Organic Carbon in the Gobi Desert of Northwestern China
Pingping Zhang, Ming'an Shao
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0093584
Abstract: Soil organic carbon (SOC) plays an important role in improving soil properties and the C global cycle. Limited attention, though, has been given to assessing the spatial patterns and stocks of SOC in desert ecosystems. In this study, we quantitatively evaluated the spatial variability of SOC and its influencing factors and estimated SOC storage in a region (40 km2) of the Gobi desert. SOC exhibited a log-normal depth distribution with means of 1.6, 1.5, 1.4, and 1.4 g kg?1 for the 0–10, 10–20, 20–30, and 30–40 cm layers, respectively, and was moderately variable according to the coefficients of variation (37–42%). Variability of SOC increased as the sampling area expanded and could be well parameterized as a power function of the sampling area. Significant correlations were detected between SOC and soil physical properties, i.e. stone, sand, silt, and clay contents and soil bulk density. The relatively coarse fractions, i.e. sand, silt, and stone contents, had the largest effects on SOC variability. Experimental semivariograms of SOC were best fitted by exponential models. Nugget-to-sill ratios indicated a strong spatial dependence for SOC concentrations at all depths in the study area. The surface layer (0–10 cm) had the largest spatial dependency compared with the other layers. The mapping revealed a decreasing trend of SOC concentrations from south to north across this region of the Gobi desert, with higher levels close to an oasis and lower levels surrounded by mountains and near the desert. SOC density to depths of 20 and 40 cm for this 40 km2 area was estimated at 0.42 and 0.68 kg C m?2, respectively. This study provides an important contribution to understanding the role of the Gobi desert in the global carbon cycle.
A Note on Pseudo-Hermitian Systems with Point Interactions and Quantum Separability
Shao-Ming Fei
Physics , 2007, DOI: 10.1007/s10582-006-0384-z
Abstract: We study the quantum entanglement and separability of Hermitian and pseudo-Hermitian systems of identical bosonic or fermionic particles with point interactions. The separability conditions are investigated in detail.
Exactly Solvable Many-Body Systems and Pseudo-Hermitian Point Interactions
Shao-Ming Fei
Physics , 2004, DOI: 10.1023/B:CJOP.0000014366.93476.92
Abstract: We study Hamiltonian systems with point interactions and give a systematic description of the corresponding boundary conditions and the spectrum properties for self-adjoint, PT-symmetric systems and systems with real spectra. The integrability of one dimensional many body systems with these kinds of point (contact) interactions are investigated for both bosonic and fermionic statistics.
Integrability and PT-symmetry of $N$-Body Systems with Spin-coupling $δ$-Interactions
Shao-Ming Fei
Physics , 2003, DOI: 10.1023/B:CJOP.0000010528.72652.0d
Abstract: We study the PT-symmetric boundary conditions for "spin"-related $\delta$-interactions and the corresponding integrability for both bosonic and fermionic many-body systems. The spectra and bound states are discussed in detail for spin-1/2 particle systems.
On Integrability and Pseudo-Hermitian Systems with Spin-Coupling Point Interactions
Shao-Ming Fei
Physics , 2005, DOI: 10.1007/s10582-005-0111-1
Abstract: We study the pseudo-Hermitian systems with general spin-coupling point interactions and give a systematic description of the corresponding boundary conditions for PT-symmetric systems. The corresponding integrability for both bosonic and fermionic many-body systems with PT-symmetric contact interactions is investigated.
Gisin's Theorem for Arbitrary Dimensional Multipartite States
Ming Li,Shao-Ming Fei
Physics , 2010, DOI: 10.1103/PhysRevLett.104.240502
Abstract: We present a set of Bell inequalities which are sufficient and necessary for separability of general pure multipartite quantum states in arbitrary dimensions. The relations between Bell inequalities and distillability are also studied. We show that any quantum states that violate one of these Bell inequalities are distillable.
Infiltration characteristics of non-aqueous phase liquids in undisturbed loessal soil cores

WANG Yunqiang,SHAO Ming'an,

环境科学学报(英文版) , 2009,
Abstract: The widespread contamination of soils and aquifers by non-aqueous phase liquids (NAPL), such as crude oil, poses serious environmental and health hazards globally. Understanding the infiltration characteristics of NAPL in soil is crucial in mitigating or remediating soil contamination. The infiltration characteristics of crude and diesel oils into undisturbed loessal soil cores, collected in polymethyl methacrylate cylindrical columns, were investigated under a constant fluid head (3 cm) of either crude oil or diesel oil. The infiltration rate of both crude and diesel oils decreased exponentially as wetting depth increased with time. Soil core size and bulk density both had significant effects on NAPL infiltration through the undisturbed soil cores; a smaller core size or a greater bulk density could reduce oil penetration to depth. Compacting soil in areas susceptible to oil spills may be an effective stratage to reduce contamination. The infiltration of NAPL into soil cores was spatially anisotropic and heterogeneous, thus recording the data at four points on the soil core is a good stratage to improve the accuracy of experimental results. Our results revealed that crude and diesel oils, rather than their components, have a practical value for remediation of contaminated loessal soils.
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