Dezhi Zhang

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Human herpesvirus 8 (HHV-8) is thought to be essential for the development of all forms of Kaposi's sarcoma (KS). HHV-8 DNA is present virtually in all KS tumor biopsy samples. Genes at both ends of the HHV-8 genome have been shown to vary considerably. Seven major molecular subtypes of HHV-8 were defined based on the amino acid sequence of the open reading(More)
To meet the 2015 timeline, a hybrid time- and wavelength-division multiplexed passive optical network (TWDM-PON) has been selected as the pragmatic path toward the second stage of the next-generation PON (NG-PON2). High-end business users and mobile front-haul/back-haul for next-generation wireless systems that highly rely on symmetrical data rate services(More)
Based on the uncertainty characteristic about produce in the plant and demand of customer, a fuzzy chance constrained programming optimization model is presented. In the proposed model, the stochastic variables are converted into fuzzy parameters by a new method. Then, a revised hybrid genetic algorithm is developed to solve the proposed model, which are(More)
Based on the logistics nodes system consisting of first-degree logistics node (logistics park) secondary logistics nodes (including logistics center and distribution center), a dynamic logistics nodes location model of multi-period , multi-type cargo flow and multiple logistics nodes is given. The optimization model considers the factors including fixed(More)
BACKGROUND AND PURPOSE Data on the association between PDE4D SNP 87 and the risk of ischemic stroke are contentious and debatable. The present meta-analysis was undertaken to systematically summarize the possible association. METHODS Based on comprehensive search of PubMed, Embase, and CNKI databases, we identified 18 eligible articles examining the(More)
This study develops an optimization model to integrate facility location and inventory control for a three-level distribution network consisting of a supplier, multiple distribution centers (DCs), and multiple retailers. The integrated model addressed in this study simultaneously determines three types of decisions: (1) facility location (optimal number,(More)
Flash memory based solid state drives (SSDs) have emerged as a new alternative to replace magnetic disks due to their high performance and low power consumption. However, random writes on SSDs are much slower than SSD reads. Therefore, traditional index structures, which are designed based on the symmetrical I/O property of magnetic disks, cannot completely(More)
This paper proposes a new model of simultaneous optimization of three-level logistics decisions, for logistics authorities, logistics operators, and logistics users, for regional logistics network with environmental impact consideration. The proposed model addresses the interaction among the three logistics players in a complete competitive logistics(More)
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