oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 2 )

2019 ( 312 )

2018 ( 2223 )

2017 ( 2112 )

Custom range...

Search Results: 1 - 10 of 127100 matches for " Ruihong Li "
All listed articles are free for downloading (OA Articles)
Page 1 /127100
Display every page Item
A Research on Control Layers of SOEs and R & D Investment  [PDF]
Xin Lu, Ruihong Li
Modern Economy (ME) , 2018, DOI: 10.4236/me.2018.95059
Abstract: The pyramid structure of the SOEs along with the process of continuous reform has significantly affected the business activities and the decision-making behaviors of enterprises. Based on the data from 2007 to 2015, the paper validates the influence of the length of the control chain of SOEs on the R & D investment behavior of enterprises. Through analysis, we find that, with the control chain being lengthened, it suggests the significant decrease in R & D investment, but this correlation is not obvious for the central SOEs. Further research finds that, although there is no significant effect between the length of the control chain of the central SOEs and the R & D investment in the case of the whole sample, when the control layer is greater than median, the elongation of the control chain significantly inhibits the R & D investment of central SOEs and local SOEs. What’ s more, we find that the negative correlation of the number of control layers and R & D investment for local SOEs is only significant when the agent cost is lower.
The environment evolution of Wuliangsuhai wetland

YU Ruihong,LI Changyou,LIU Tingxi,XU Youpeng,

地理学报 , 2004,
Abstract: The environment evolution of Wuliangsuhai wetland since 1986 is analyzed based on the remote sensing principle. The total water area of Wuliangsuhai lake has been increased during the past 17 years. The open water area had an increasing trend before 1987, and the trend was decreasing up to 1996, then the trend has increased again since 2000; the variation of the water area with dense aquatic weed is basically contradictory to the variation of open water area. The natural reed area had been decreased before 1987, and then it has been increased. The areas of shallow water and swamp have been slightly increased, in fact, the variations are quite steady. The artificial reed area has been increased since the reed plantation was started in 1988. The relationships of the water environment, the climate, hydrology and different types of areas are discussed, and then the technological measures for sustainable development and utilization of Wuliangsuhai lake water environment are proposed.
Stochastic bifurcation in a duffing-van der pol system
Duffing-van der Pol系统的随机分岔

Li Shuang,Xu Wei,Li Ruihong,
李爽
,徐伟,李瑞红

力学学报 , 2006,
Abstract: Stochastic bifurcation of a Duffing-van der Pol system subject to a deterministic harmonic excitation and bounded noise is studied by using the generalized cell mapping method with diagraphes. System parameters are chosen in the range of two co-existing attractors and a chaotic saddle, during their evolution. It is found that stochastic bifurcation mostly occurs when a stochastic attractor collides with a stochastic saddle. In our study, two kinds of discontinuous bifurcations are found according to the abrupt increase or disappearance of the attractor when it collides with the saddle in the basin interior or on the boundary. Our study also reveals that the bifurcation value is different from that of D-bifurcation which is defined by the change of the sign of the top Lyapunov exponent.
Genetic Analysis and QTL Mapping of Seed Coat Color in Sesame (Sesamum indicum L.)
Haiyang Zhang, Hongmei Miao, Libin Wei, Chun Li, Ruihong Zhao, Cuiying Wang
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0063898
Abstract: Seed coat color is an important agronomic trait in sesame, as it is associated with seed biochemical properties, antioxidant content and activity and even disease resistance of sesame. Here, using a high-density linkage map, we analyzed genetic segregation and quantitative trait loci (QTL) for sesame seed coat color in six generations (P1, P2, F1, BC1, BC2 and F2). Results showed that two major genes with additive-dominant-epistatic effects and polygenes with additive-dominant-epistatic effects were responsible for controlling the seed coat color trait. Average heritability of the major genes in the BC1, BC2 and F2 populations was 89.30%, 24.00%, and 91.11% respectively, while the heritability of polygenes was low in the BC1 (5.43%), in BC2 (0.00%) and in F2 (0.89%) populations. A high-density map was constructed using 724 polymorphic markers. 653 SSR, AFLP and RSAMPL loci were anchored in 14 linkage groups (LG) spanning a total of 1,216.00 cM. The average length of each LG was 86.86 cM and the marker density was 1.86 cM per marker interval. Four QTLs for seed coat color, QTL1-1, QTL11-1, QTL11-2 and QTL13-1, whose heritability ranged from 59.33%–69.89%, were detected in F3 populations using CIM and MCIM methods. Alleles at all QTLs from the black-seeded parent tended to increase the seed coat color. Results from QTLs mapping and classical genetic analysis among the P1, P2, F1, BC1, BC2 and F2 populations were comparatively consistent. This first QTL analysis and high-density genetic linkage map for sesame provided a good foundation for further research on sesame genetics and molecular marker-assisted selection (MAS).
Response Surface Optimization of Enzymatic Hydrolysis of Sugar Beet Leaves into Fermentable Sugars for Bioethanol Production  [PDF]
Natthiporn Aramrueang, Steven M. Zicari, Ruihong Zhang
Advances in Bioscience and Biotechnology (ABB) , 2017, DOI: 10.4236/abb.2017.82004
Abstract: ?Sugar beet leaves are the major crop waste from sugar beet production, while the unused leaves contain a high number of sugars and polysaccharides. The effects of different enzyme products (cellulase, Cellic CTec2; xylanase, Cellic HTec2; and pectinase, Pectinex Ultra SPL) were determined during high-solids enzymatic hydrolysis of sugar beet leaves at 10% total solids (TS) content. Response surface methodology was used to study the effects of enzyme loadings during the hydrolysis of sugar beet leaves for producing fermentable sugars. It was found that both cellulases and pectinases are important enzymes for the hydrolysis of sugar beet leaves. Enzyme loading and reaction time were important factors. Based on the amount of sugars released, a maximum sugar conversion of 82% was achieved after 72 h of hydrolysis using 30 filter paper unit (FPU) g-1 glucan for cellulase and 150 polygalacturonase unit (PGU) g-1 polygalacturonic acid for pectinase, or 37 FPU g-1 glucan for cellulase and 100 PGU g-1 polygalacturonic acid for pectinase. The corresponding sugar yield and sugar concentration were 0.35 g·g-1 TS, and 35 g·l-1, respectively. Sugar conversion ranged from 59% - 70%, 68% - 80%, and 74% - 82% after 24 h, 48 h, and 72 h of hydrolysis depending on the design conditions.
Analytic Bethe Ansatz for 1-D Hubbard model and twisted coupled XY model
Ruihong Yue,Tetsuo Deguchi
Physics , 1996, DOI: 10.1088/0305-4470/30/3/011
Abstract: We found the eigenvalues of the transfer matrices for the 1-D Hubbard model and for the coupled XY model with twisted boundary condition by using the analytic Bethe Ansatz method. Under a particular condition the two models have the same Bethe Ansatz equations. We have also proved that the periodic 1-D Hubbard model is exactly equal to the coupled XY model with nontrivial twisted boundary condition at the level of hamiltonians and transfer matrices.
Diagonalization of 2-D inhomogeneous model related to the Hubbard model
Ruihong Yue,Tetsuo Deguchi
Physics , 1997,
Abstract: We found the eigenvalues of the transfer matrix for the 2-D inhomogeneous statistical model with twisted boundary condition by using the analytic Bethe Ansatz method. In the uniform case, the derived hamiltonian generalizes the 1-D Hubbard model with the twisted boundary. We also give the energy spectra for the derived hamiltonian.
Magnetic susceptibility and low-temperature specific-heat of integrable 1-D Hubbard model under open-boundary conditions
Ruihong Yue,Tetsuo Deguchi
Physics , 1997, DOI: 10.1088/0305-4470/30/23/013
Abstract: The magnetic susceptibility and the low-temperature specific heat of the 1-dimensional Hubbard model under the integrable open-boundary conditions are discussed through the Bethe ansatz with the string hypothesis. The contributions of the boundary fields to both the susceptibility and the specific heat are obtained, and their exact expressions are analytically derived.
Rotation of D-brane and Non-commutative Geometry
Pei Wang,Ruihong Yue
Physics , 1999,
Abstract: Our motivation is to find the relationship between the commutator of coordinates and uncertainty relation involving only the coordinates. The boundary condition with constant background field is connected with the rotation of D-brane at general angle. And the mode expansions of D-brane we found is more reasonable than those appeared in literature. The partition functions and scattering amplitudes are also discussed.
Exact solutions of 1-D Hubbard model with open boundary conditions and the conformal dimensions under boundary magnetic fields
Tetsuo Deguchi,Ruihong Yue
Physics , 1997,
Abstract: The Bethe ansatz equations of the 1-D Hubbard model under open boundary conditions are systematically derived by diagonalizing the inhomogeneous transfer matrix of the XXX model with open boundaries. Through the finite-size correction, we obtain the energy spectrum of the open chain and discuss the effects of boundary magnetic fields applied only at the edges of the chain. Several physical implications of the finite-size spectrum are discussed from the viewpoint of the boundary conformal field theories (BCFT); the conformal dimension of the spin excitation is quite sensitive to the boundary magnetic fields, and this sensitivity can be explained in terms of the $\pi/2$-phase shift of the BCFT. For several limiting cases such as for the half-filling case, the conformal dimensions are explicitly calculated.
Page 1 /127100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.