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Search Results: 1 - 10 of 122222 matches for " Yong Zhang "
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Study on the Advance Payment Rate of Advance-Payment Collection Business Based on Logistics Financial  [PDF]
Weiguo Cao, Yong Zhang
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.37B010
Abstract:

This paper takes the advance-payment collection business based on the logistics financial as the research object, on the assumption that the logistics enterprises pay the price with their own money,and the shipper repurchases the goods unconditionally when the delivery breaks rule. From the point of logistics enterprises to quantitative analyze its key indicators of risk management and control - advance payment rate, expectations for providing a scientific basis of decision making for the business risk of logistics enterprises in China, in order to solve the outstanding contradictions between a lot of money tied up in inventory and difficulties in financing of SMEs,and provide a decision support from the side of  management techniques.

An Efficient Adaptive Iteratively Reweighted l1 Algorithm for Elastic lq Regularization  [PDF]
Yong Zhang, Wanzhou Ye
Advances in Pure Mathematics (APM) , 2016, DOI: 10.4236/apm.2016.67036
Abstract: In this paper, we propose an efficient adaptive iteratively reweighted l1 algorithm (A-IRL1 algorithm) for solving the elastic lq regularization problem. We prove that the sequence generated by the A-IRL1 algorithm is convergent for any rational \"\" and the limit is a critical point of the elastic lq regularization problem. Under certain conditions, we present an error bound for the limit point of convergent sequence.
The Impacts of Website Characteristics and Customer Participation on Citizenship Behaviors: The Mediating Role of Co-Creation Experience in Virtual Brand Communities  [PDF]
Yong Zhang, Lu Chen
Advances in Applied Sociology (AASoci) , 2017, DOI: 10.4236/aasoci.2017.74009
Abstract: More and more enterprises organize co-creation activities in virtual brand community to allow customers to participate in new products or new service development process. Involved in those activities, customers obtain experience value, which can make them have sense of achievement. Does this co-creation experience promote the formation of loyalty, such as customer citizenship behaviors? Dowebsite characteristics influence the co-creation experience? The study examines the relationship between co-creation experience to citizenship behaviors and the impact of website characteristics as well as customer participation to co-creation experience. Based previous research, the study builds structural equation model and conducts empirical analysis. The results show that the affection-relevant clues of the site characteristics and customer participation have a positive impact on three dimensions of the experience, and the task-relevant clues have a positive influence on the hedonic experience and social experience. The two dimensions of co-creation experience have a significant positive impact on citizenship behaviors and have a mediating effect.
Nonlinear Evolution Characteristics of the NCEP Ensemble Forecast Products  [PDF]
Yong Li, Xiakun Zhang
Atmospheric and Climate Sciences (ACS) , 2018, DOI: 10.4236/acs.2018.83022
Abstract: By using NCEP/NCAR reanalysis products to forecast the nonlinear evolution of the spatial and temporal characteristics, the results shows that on the Spatial dimensions, NCEP ensemble forecast that the products of nonlinear evolution have obvious zonal features. The overall distribution situation is the nonlinear evolution of the southern hemisphere, which is larger than that of the northern hemisphere. In the same hemisphere, low value area is near the equator, and high value area for middle and high latitude area. On the time dimension, the nonlinear evolution of NCEP ensemble prediction products will increase with the extension of the forecast period. In addition, the nonlinear evolution of NCEP ensemble forecast products in North America is greater than the Asian region.
Upscaling conductivity and porosity in three-dimensional heterogeneous porous media
Yong Zhang
Chinese Science Bulletin , 2004, DOI: 10.1007/BF03183431
Abstract: An empirical formula is presented to upscale the conductivity of 3-dimensional heterogeneous porous media, in which the distribution of local-scale conductivity is non-Gaussian with a high variance. The upscaled conductivity is determined as a function of the volumetric proportion, the spatial connectivity and the statistical geometric length of high-permeable inclusions, and the arithmetic mean of conductivities of all hydrofacies. A systematic comparison to other traditional upscaling methods indicates that this empirical formula provides a better estimation of the equivalent conductivity. In the second part of this study, numerical experiments of solute migration reveal that porosity also needs to be upscaled to capture the transport of contaminants in a heterogeneous medium using an effective or upscaled homogeneous medium. This is due to the tendency of contaminants to be preferrentially transported by 3-dimensional pathways composed of high-permeable materials in heterogeneous aquifer systems. The apparent difference between the actual transport velocity of contaminants and the upscaled velocity, based on the equivalent conductivity, forces upscaling of porosity. Further systematic analyses demonstrate that the upscaled porosity follows a non-linear trend as the content of high-permeable sediments decreases. Resultant upscaled porosity, with values varying between 0.004 and 1.5, is beyond the definition of the traditional porosity on the representative elementary volume (REV) scale. When the content of high-permeable materials is less than 30%, the upscaling of porosity is critical in the simulation of the contaminant transport in a heterogeneous medium using an upscaled, homogeneous counterpart.
Effects of medicated serum prepared with Chinese herbal medicine Changweiqing on pharmacokinetics of oxaliplatin in colon cancer cells
Yong Zhang
Zhong Xi Yi Jie He Xue Bao , 2012,
Abstract: OBJECTIVE: To investigate the effects of Changweiqing-medicated serum, which was prepared with a compound traditional Chinese herbal medicine, on the reversal of oxaliplatin (L-OHP) resistance and the relationship between the reversal and cellular accumulation of platinum and proteins associated with copper transporter in HCT116/L-OHP cells. METHODS: For clarifying the reversal effect of Changweiqing, methyl thiazolyl tetrazolium was applied to determine the L-OHP resistance of HCT116/L-OHP cell line. The relationship between the cellular accumulation of platinum and the L-OHP resistance in HCT116/L-OHP cells, and the effects of drug-medicated serum on intracellular contents of platinum were detected by atomic absorption spectrophotometry. Western blot method was used to determine the expressions of human copper transporter 1 (hCTR1), ATPase Cu2+ transporting alpha polypeptide (ATP7A), copper-transporting P-type adenosine triphosphatase (ATP7B), glutathione S-transferase-π (GST-π) and multidrug resistance-associated protein 2 (MRP2).RESULTS: The inhibitory concentration 50% values of different pairs of L-OHP-sensitive and -resistant cells were 7.2 and 89.00. The resistance index of HCT116/L-OHP cells was 12.36. The reverse index of drug serum on HCT116/L-OHP cells was 2.74. The platinum content in HCT116/L-OHP cells was decreased compared with HCT116 cells in condition of 7.2 μg/mL L-OHP. After treating by 7.5% Changweiqing-medicated serum, the intracellular platinum contents in L-OHP-sensitive and -resistant cells were increased. It was dose-dependent that drug-medicated serum promoted the uptake of L-OHP by HCT116 or HCT116/L-OHP cells and inhibited the discharge. The 7.5% Changweiqing-medicated serum increased the expression of hCTR1 and decreased the expressions of ATP7A and ATP7B in HCT116/L-OHP cells, but had no effects on GST-π and MRP2 protein expressions. CONCLUSION: Changweiqing can reverse the L-OHP resistance of HCT116/L-OHP by increasing the cellular platinum-DNA accumulation. Down-regulation of expression of ATP7B and ATP7A, and up-regulation of hCTR1 may cause the increase of intracellular platinum content in HCT116/L-OHP cells.
Maximum Glass-forming Ability Obtained at an Off-eutectic Composition Within a La-al-(Cu, Ni) Pseudo-ternary Eutectic System
Yong Zhang
Journal of Applied Sciences , 2006,
Abstract: Glass formation was investigated for the La100-xAl0.412x(Cu,Ni)0.588x(x = 30-56.3) alloys. The optimum Glass Forming Ability (GFA) with full glassy rods of 12 mm in diameter was obtained at an off-eutectic composition La62Al15.7(Cu,Ni)22.3, by copper mold casting, while a full glassy rod of only 1.5 mm in diameter was obtained at the La66Al14(Cu, Ni)20 eutectic alloy. A strong dependence of GFA on the composition was observed for these alloys. It has been found that the GFA does not correlate well with the extent of the supercooled liquid region (ΔTx) and is even not related closely to the reduced glass transition temperature Trg.
Abstract Error Groups Via Jones Unitary Braid Group Representations at q=i
Yong Zhang
Physics , 2009,
Abstract: In this paper, we classify a type of abstract groups by the central products of dihedral groups and quaternion groups. We recognize them as abstract error groups which are often not isomorphic to the Pauli groups in the literature. We show the corresponding nice error bases equivalent to the Pauli error bases modulo phase factors. The extension of these abstract groups by the symmetric group are finite images of the Jones unitary representations (or modulo a phase factor) of the braid group at q=i or r=4. We hope this work can finally lead to new families of quantum error correction codes via the representation theory of the braid group.
Quantum Fourier Transform Over Galois Rings
Yong Zhang
Physics , 2009,
Abstract: Galois rings are regarded as "building blocks" of a finite commutative ring with identity. There have been many papers on classical error correction codes over Galois rings published. As an important warm-up before exploring quantum algorithms and quantum error correction codes over Galois rings, we study the quantum Fourier transform (QFT) over Galois rings and prove it can be efficiently preformed on a quantum computer. The properties of the QFT over Galois rings lead to the quantum algorithm for hidden linear structures over Galois rings.
Quantum Error Correction Code in the Hamiltonian Formulation
Yong Zhang
Physics , 2008,
Abstract: The Hamiltonian model of quantum error correction code in the literature is often constructed with the help of its stabilizer formalism. But there have been many known examples of nonadditive codes which are beyond the standard quantum error correction theory using the stabilizer formalism. In this paper, we suggest the other type of Hamiltonian formalism for quantum error correction code without involving the stabilizer formalism, and explain it by studying the Shor nine-qubit code and its generalization. In this Hamiltonian formulation, the unitary evolution operator at a specific time is a unitary basis transformation matrix from the product basis to the quantum error correction code. This basis transformation matrix acts as an entangling quantum operator transforming a separate state to an entangled one, and hence the entanglement nature of the quantum error correction code can be explicitly shown up. Furthermore, as it forms a unitary representation of the Artin braid group, the quantum error correction code can be described by a braiding operator. Moreover, as the unitary evolution operator is a solution of the quantum Yang--Baxter equation, the corresponding Hamiltonian model can be explained as an integrable model in the Yang--Baxter theory. On the other hand, we generalize the Shor nine-qubit code and articulate a topic called quantum error correction codes using Greenberger-Horne-Zeilinger states to yield new nonadditive codes and channel-adapted codes.
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