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Search Results: 1 - 10 of 75446 matches for " ZHU Wei "
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Effects of Anwei decoction on the protein expression of TFF in rats with chronic atrophic gastritis  [PDF]
Wei Wei, Shouning Lin, Yongping Zhu
Modern Research in Inflammation (MRI) , 2014, DOI: 10.4236/mri.2014.31001
Abstract:

Objective: To explore the effects of Anwei decoction (AD) on the protein expression of TFF in rats with chronic atrophic gastritis(CAG). Methods: Forty-eight healthy rats were randomly divided into 4 groups: normal control group, pathologic model group, Anwei Decoction group, and Weifuchun group. CAG was induced in rats with N-methy-N-nitro-N-nitrogua-nidine (MNNG). The protein expression of TFF in rats’ gastric mucosa was determined by immunohistochemistry. Results: Compared with that in the normal control group, the protein expression of TFF1 was significantly enhanced in the pathologic model, Anwei Decoction and Weifuchun groups (both P < 0.01). The protein expression level of TFF1 was significantly higher in the Anwei Decoction group than in the Weifuchun group (P < 0.01). Compared with the normal control group, the protein expression of TFF2 was significantly enhanced in the pathologic model, Anwei Decoction and Weifuchun groups (both P < 0.01). The protein expression level of TFF2 was significantly higher in the Anwei Decoction group than in the Weifuchun group (P < 0.01). In comparison with the pathologic model group, the protein expression of TFF3 was remarkably reduced in Anwei Decoction and Weifuchun groups (both P < 0.01). but there was no difference between the group of Anwei decoction and the group of Weifuchun (P > 0.05). Conclusion: Anwei decoction may be effective in the treatment of CAG by enhancing the protein expression of TFF1, TFF2 while reducing that of TFF3 in gastric mucosas.

A Sufficient Condition for Asymptotic Stability of Discrete-Time Interval System with Delay
Wei Zhu
Discrete Dynamics in Nature and Society , 2008, DOI: 10.1155/2008/591261
Abstract: The asymptotic stability of discrete-time interval system with delay is discussed. A new sufficient condition for preserving the asymptotic stability of the system is presented by means of the inequality techniques. By mathematical analysis, the stability criterion is less conservative than that in previous result. Finally, one example is given to demonstrate the applicability of the present scheme.
Effect of pre-operative neoadjuvant chemo-radiotherapy and surgical treatment on resectable esophageal cancer: a Meta-analysis
Wei ZHU
Medical Journal of Chinese People's Liberation Army , 2011,
Abstract: Objective To explore the effect of pre-operative adjuvant chemo-radiotherapy and surgical treatment on resectable esophageal cancer.Methods By searching Medline,CENTRAL(the Cochrane Central Register of Controlled trials),EMBASE,CBM(China Biology Medicine) and CNKI(China National Knowledge Infrastructure) by computer,the data of randomized controlled trials(RCTs) of neoadjuvant chemoradiotherapy and surgical treatment for resectable esophageal cancer were selected and analyzed using Stata 11.0 statistical software.The study population was patients with resectable early or medium stage esophageal cancer,the intervention was neoadjuvant chemoradiotherapy(include sequential chemoradiotherapy and concurrent chemoradiotherapy) followed with surgical resection,the outcome indices were 1-and 3-year survival rates and local recurrence rate.The combined odds ratio(OR),relative risk(RR) and their 95% confidence interval(CI) were calculated to estimate the results.Results Nine articles including a total of 1156 patients were finally analyzed in the Meta-analysis.Among all the patients,579 received neoadjuvant chemoradiotherapy(study group) and 577 received surgical treatment only(control group).Compared the study group and control group,the OR of 1-and 3-year survival rate was 1.06(95%CI=0.94-1.19,Z=0.97,P=0.33) and 1.30(95%CI=1.07.-1.57,Z=2.67,P=0.008),respectively,and the RR of local recurrence rate was 0.75(95%CI=0.50-1.12,Z=1.40,P=0.162).Conclusions Neoadjuvant chemoradiotherapy could improve the 3-year survival rate of patients with resectable esophageal cancer,but could not decrease the local recurrence rate.
Consensus of Discrete Time Second-Order Multiagent Systems with Time Delay
Wei Zhu
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/390691
Abstract:
Consensus of Discrete Time Second-Order Multiagent Systems with Time Delay
Wei Zhu
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/390691
Abstract: The consensus problem for discrete time second-order multiagent systems with time delay is studied. Some effective methods are presented to deal with consensus problems in discrete time multiagent systems. A necessary and sufficient condition is established to ensure consensus. The convergence rate for reaching consensus is also estimated. It is shown that arbitrary bounded time delay can safely be tolerated. An example is presented to illustrate the theoretical result. 1. Introduction The study of information flow and interaction among multiple agents in a group plays an important role in understanding the coordinated movements of these agents. As a result, a critical problem for coordinated control is to design appropriate protocols and algorithms such that the group of agents can reach consensus on the shared information in the presence of limited and unreliable information exchange as well as communication time delays. In multiagent systems, communication time delays between agents are inevitable due to various reasons. For instance, they may be caused by finite signal transmission speeds, traffic congestions, packet losses, and inaccurate sensor measurements. In addition, in practical engineering applications, the agents in multiagent systems transmit sampled information by using sensors or communication network, and the coordination control algorithms are proposed based on the discrete time sampled data to achieve the whole control object. The typical discrete-time consensus control strategy was provided by Jadbabaie et al. [1], which is a simplified Vicsek model [2]. Recently, the consensus analysis of the discrete time first order multiagent systems with or without communication time delays has been studied extensively, see [3–6], to name a few. While it has been realized that modeling more complex practical processes needs the use of double integrator dynamics, as a result, cooperative control for multiple agents with double-integrator dynamics has become an active area of research. Compared with the first-order consensus, Ren and Atkins [7] show that the existence of a directed spanning tree is a necessary rather than a sufficient condition to reach second-order consensus. Therefore, the extension of consensus algorithms from first order to second order is nontrivial. In recent years, more attention has been paid to the consensus problem of multiagent systems with continuous time second-order systems and much progress has been made, some important works include [8–13]. But there has been little attention to the consensus of discrete time
Evidence of Different Formation Mechanisms for Hot versus Warm Super-Earths
Wei Zhu
Physics , 2015,
Abstract: Using the Kepler planet sample from Buchhave et al. and the statistical method clarified by Schlaufman, I show that the shorter-period super-Earths have a different dependence on the host star metallicity from the longer-period super-Earths, with the transition period being in the period range from 70 to 100 days. The hosts of shorter-period super-Earths are on average more metal-rich than those of longer-period super-Earths. The existence of such a transition period cannot be explained by any single theory of super-Earth formation, suggesting that super-Earths have formed via at least two mechanisms.
A new approach to parton recombination in a QCD evolution equation
Wei Zhu
Physics , 1998, DOI: 10.1016/S0550-3213(99)00237-0
Abstract: Parton recombination is reconsidered in perturbation theory without using the AGK cutting rules in the leading order of the recombination. We use time-ordered perturbation theory to sum the cut diagrams, which are neglected in the GLR evolution equation. We present a set of new evolution equations including parton recombination.
Are valence quarks rotating?
Wei Zhu
Physics , 2012,
Abstract: We suggest to compare the deep inelastic scattering structure functions measured in the unpolarized charged-lepton scattering off a transversely polarized proton and off a longitudinally polarized proton at larger Bjorken variable $x$, one may get a direct evidence concerning the valence quark orbital angular momentum in the proton. This possible rotating effect is estimated by using a proton-ensemble model.
A regularity theory for multiple-valued Dirichlet minimizing maps
Wei Zhu
Mathematics , 2006,
Abstract: This paper discusses the regularity of multiple-valued Dirichlet minimizing maps into the sphere. It shows that even at branched point, as long as the normalized energy is small enough, we have the energy decay estimate. Combined with the previous work by Chun-Chi Lin, we get our first estimate that m-2 dimensional Hausdorff measure of singular set is zero. Furthermore, by looking at the tangent map and using dimension reduction argument, we show that the singular set is at least of codimension 3.
An Energy Reducing Flow for Multiple-Valued Functions
Wei Zhu
Mathematics , 2006,
Abstract: By the method of discrete Morse flows, we construct an energy reducing multiple-valued function flow. The flow we get is Holder continuous with respect to the L-2 norm. We also give another way of constructing flows in some special cases, where the flow we get behaves like ordinary heat flow.
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