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Search Results: 1 - 10 of 59304 matches for " WEI Chao "
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Neutrino Masses and Lepton-flavor-violating $\tau$ Decays in the Supersymmetric Left-right Model
Chao, Wei
High Energy Physics - Phenomenology , 2007,
Abstract: In the supersymmetric left-right model, the light neutrino masses are given by the Type-II seesaw mechanism. A duality property about this mechanism indicates that there exist eight possible Higgs triplet Yukawa couplings which result in the same neutrino mass matrix. In this paper, We work out the one-loop renormalization group equations for the effective neutrino mass matrix in the supersymmetric left-right model. The stability of the Type-II seesaw scenario is briefly discussed. We also study the lepton-flavor-violating processes ($\tau\to \mu\gamma$ and $\tau\to e\gamma$) by using the reconstructed Higgs triplet Yukawa couplings.
ATLAS Diboson Excesses from the Stealth Doublet Model
Wei Chao
Physics , 2015, DOI: 10.1016/j.physletb.2015.12.007
Abstract: The ATLAS collaboration has reported excesses in diboson invariant mass searches of new resonances around 2 TeV, which might be a prediction of new physics around that mass range. We interpret these results in the context of a modified stealth doublet model where the extra Higgs doublet has a Yukawa interaction with the first generation quarks, and show that the heavy CP-even Higgs boson can naturally explain the excesses in the WW and ZZ channels with a small Yukawa coupling, \xi\sim 0.15, and a tiny mixing angle with the SM Higgs boson, \alpha \sim 0.06. Furthermore, the model satisfy constraints from colliders and electroweak precision measurements.
Toll-Like Receptors and Myocardial Inflammation
Yan Feng,Wei Chao
International Journal of Inflammation , 2011, DOI: 10.4061/2011/170352
Abstract: Toll-like receptors (TLRs) are a member of the innate immune system. TLRs detect invading pathogens through the pathogen-associated molecular patterns (PAMPs) recognition and play an essential role in the host defense. TLRs can also sense a large number of endogenous molecules with the damage-associated molecular patterns (DAMPs) that are produced under various injurious conditions. Animal studies of the last decade have demonstrated that TLR signaling contributes to the pathogenesis of the critical cardiac conditions, where myocardial inflammation plays a prominent role, such as ischemic myocardial injury, myocarditis, and septic cardiomyopathy. This paper reviews the animal data on (1) TLRs, TLR ligands, and the signal transduction system and (2) the important role of TLR signaling in these critical cardiac conditions. 1. Introduction Innate immune system represents the first line of defense against foreign pathogens. Toll-like receptors (TLRs) belong to the family of pattern recognition receptors (PRRs). PRRs recognize the conserved motifs in pathogens termed pathogen-associated molecular patterns (PAMPs) and trigger innate immune response [1, 2]. In addition to participating in the host defense against infectious pathogens, accumulating evidence suggests that TLRs also play an essential role in tissue inflammationand contribute to “noninfectious” tissue damage such as cardiac ischemia/reperfusion (I/R) injury, postischemic remodeling, and atherosclerosis [3–6]. Thus, understanding TLR signaling and their role in cardiovascular diseases may help to identify potential targets for intervention and have important clinical implications. This paper reviews TLR signaling and its critical roles in several inflammatory cardiac conditions: I/R injury, viral and autoimmune myocarditis, and septic cardiomyopathy. 2. Toll-Like Receptors Toll means “amazing” and “fantastic” in German. In 1985, Anderson and colleagues coined it for a protein critical for early embryonic development of Drosophila [7, 8]. A decade later, Lemaitre et al. found that this protein was also essential to the host innate immunity against fungal infection in adult flies [9]. Subsequently, Medzhitov and colleagues identified a mammalian homologue of the Drosophila Toll protein in human and termed it “Toll-like receptor” [10]. Stimulation of TLR signaling leads to the activation of transcription factors such as NF-κB, one of the most important proinflammatory transcription factors. To date, 11 human and 13 mouse TLRs have been cloned. TLR1-TLR9 are conserved in both human and mouse, and all
Process Analysis in Container Shipping Network Structure Form Change
Chen Chao,Yan Wei
International Journal for Traffic and Transport Engineering , 2012,
Abstract: Being aimed at the influence of ship-size and cargo-demand changes on container shipping networks, to reveal the evolution process of container shipping networks structure form, this paper respectively designed the operation models for two major container shipping networks structure forms: Multi-port-calling network and Hub-and-spoke network, to maximizing the investment efficiency. Based on the above models, a comprehensively integrated operation model of container shipping networks is built and the evolution process of container shipping networks structure form with changing of both ship-size and cargo demands is analyzed. Finally, through a case study, results show that the comprehensive integrated operation model is very effective in the analysis of evolution process of container shipping networks structure forms.
Neutrino Masses, Dark Matter and B-L Symmetry at the LHC
Tong Li,Wei Chao
Physics , 2010, DOI: 10.1016/j.nuclphysb.2010.10.004
Abstract: We establish a hybrid seesaw mechanism to explain small neutrino masses and predict cold dark matter candidate in the context of the B-L gauge symmetry extension of the Standard Model. In this model a new scalar doublet and two new fermion singlets are introduced at loop-level beyond the minimal Type I seesaw. The lightest particle inside the loop can be dark matter candidate. We study in detail the constraints from neutrino oscillation data, lepton flavor violating processes and cosmological observation. We also explore the predictions of the decays of the new charged scalars in each spectrum of neutrino masses and show the most optimistic scenarios to distinguish the spectra. We consider the pair production of the stable fermion associated with two observable SM charged leptons at the LHC, which occurs in a two-step cascade decay of the new gauge boson Z' and the new charged scalars stand as intermediate particles. The masses of missing dark matter and its parent particle can be well-determined in such production topology.
Two-Way Training Design for Discriminatory Channel Estimation in Wireless MIMO Systems
Chao-Wei Huang
Mathematics , 2011,
Abstract: This work examines the use of two-way training in multiple-input multiple-output (MIMO) wireless systems to discriminate the channel estimation performances between a legitimate receiver (LR) and an unauthorized receiver (UR). This thesis extends upon the previously proposed discriminatory channel estimation (DCE) scheme that allows only the transmitter to send training signals. The goal of DCE is to minimize the channel estimation error at LR while requiring the channel estimation error at UR to remain beyond a certain level. If the training signal is sent only by the transmitter, the performance discrimination between LR and UR will be limited since the training signals help both receivers perform estimates of their downlink channels. In this work, we consider instead the two-way training methodology that allows both the transmitter and LR to send training signals. In this case, the training signal sent by LR helps the transmitter obtain knowledge of the transmitter-to-LR channel, but does not help UR estimate its downlink channel (i.e., the transmitter-to-UR channel). With transmitter knowledge of the estimated transmitter-to-LR channel, artificial noise (AN) can then be embedded in the null space of the transmitter-to-LR channel to disrupt UR's channel estimation without severely degrading the channel estimation at LR. Based on these ideas, two-way DCE training schemes are developed for both reciprocal and non-reciprocal channels. The optimal power allocation between training and AN signals is devised under both average and individual power constraints. Numerical results are provided to demonstrate the efficacy of the proposed two-way DCE training schemes.
Synthesis and Antitumor Activity of the Thiazoline and Thiazine Multithioether  [PDF]
Wei Wang, Bing Zhao, Chao Xu, Wenpeng Wu
International Journal of Organic Chemistry (IJOC) , 2012, DOI: 10.4236/ijoc.2012.22018
Abstract: A series of novel multithioether derivatives were synthesized by the combination of thiazoline and thiazine with dibro- mides and their structures were characterized by IR, 1H NMR, MS and elemental analysis. The synthesized derivatives were tested for antitumor activity.
A First Principles Investigation of the Mechanical Properties of g-TlN  [PDF]
Qing Peng, Chao Liang, Wei Ji, Suvranu De
Modeling and Numerical Simulation of Material Science (MNSMS) , 2012, DOI: 10.4236/mnsms.2012.24009
Abstract: We investigate the structure and mechanical properties of proposed graphene-like hexagonal thallium nitride monolayer (g-TlN) using first-principles calculations based on density-functional theory. Compared to graphene-like hexagonal boron nitride monolayer (g-BN), g-TlN is much softer, with 12% in-plane stiffness, 25%, 22%, and 20% ultimate strengths in armchair, zigzag, and biaxial strains respectively. However, g-TlN has a larger Poisson’s ratio, 0.69, about 3.1 times that of g-BN. It was found that the g-TlN also sustains much smaller strains before rupture. We obtained the second, third, fourth, and fifth order elastic constants for a rigorous continuum description of the elastic response of g-TlN. The second order elastic constants, including in-plane stiffness, are predicted to monotonically increase with pressure while the Poisson’s ratio monotonically decreases with increasing pressure.
The Nonlinear Filter Boolean Function of LILI-128 Stream Cipher Generator Is Successfully Broken Based on the Complexity of Nonlinear 0 1 Symbol Sequence  [PDF]
Xiangao Huang, Chao Wang, Wei Huang, Junxian Li
Circuits and Systems (CS) , 2013, DOI: 10.4236/cs.2013.42022
Abstract:

The nonlinear filter Boolean function of LILI-128 stream cipher generator is studied in this paper. First we measure the complexity of the stream ciphers sequence of LILI-128 stream cipher generator and obtain the shortest bit stream sequence reconstructed Boolean function of nonlinear filter in LILI-128 stream cipher generator. Then the least nonlinear Boolean function of generating stream cipher sequence is reconstructed by clusterig, nonlinear predictive and nonlinear synchronization from shortest bit stream sequence. We have verified the correctness of our reconstruction result by simulating the block diagram of Lili-128 keystream generator using our getting Boolean function and implement designers’ reference module of Lili-128 stream cipher public online, and two methods produce the same synchronous keystream sequence under same initial state, so that our research work proves that the nonlinear Boolean function of LILI-128 stream cipher generator is successfully broken.

A Study of Coupling Relationship between Financial Supervision and Innovation: Based on the Data of China’s Commercial Bank Listed in the Form of A Shares  [PDF]
Wei Song, Chao Yan, Xiaobao Peng, Shanshan Zheng
Journal of Financial Risk Management (JFRM) , 2015, DOI: 10.4236/jfrm.2015.41001
Abstract: Financial supervision and financial innovation of commercial banks are the two eternal themes of modern financial development, the research of relationship between financial supervision and innovation has become the focus of financial sector research. Based on the study of financial supervision and innovation index of commercial banks, this paper establishes a coupling model for financial supervision and innovation of commercial banks and conducts an empirical research based on data contained annual reports of commercial banks listed in the form of A Shares, with results showing that financial supervision and innovation of domestic listed commercial banks are at the stage of moderate coupling, upon which relevant suggestions are concluded.
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