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Search Results: 1 - 10 of 44820 matches for " Gang Lu "
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Research on Training and Motivation of Innovation Talents in State-Owned Enterprises  [PDF]
Gang Lu, Mingming Wang
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.37005
Abstract:

It is crucial to break the bondage on innovative talents growth to improve the speed and quality of reform and innovative development for state-owned enterprises. This paper has investigated the issue on training and motivation of innovative talents in state-owned enterprises. It has analyzed the root causes from the aspects of value guidance, market function and innovation cultures. Meanwhile, it has presented the transformation approach of talents training and motivation from the aspects of international competition, Chinese situation, people-oriented principle, flexible management, etc.

Permanence and Almost Periodic Solutions of a Discrete Ratio-Dependent Leslie System with Time Delays and Feedback Controls
Gang Yu,Hongying Lu
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/358594
Abstract: We consider a discrete almost periodic ratio-dependent Lesliesystem with time delays and feedback controls. Sufficient conditions are obtainedfor the permanence and global attractivity of the system. Furthermore, by using analmost periodic functional Hull theory, we show that the almost periodic systemhas a unique globally attractive positive almost periodic solution.
Circulating galectin-3 in the bloodstream: An emerging promoter of cancer metastasis
Lu-Gang Yu
World Journal of Gastrointestinal Oncology , 2010,
Abstract: Increased concentrations of free circulating galectin-3 are commonly seen in the blood circulation of patients with many types of cancers including colorectal cancer. Recent studies have shown that changes in circulating galectin-3 levels in cancer patients may contribute significantly to the metastatic spread of disseminating cancer cells by enhancing their ability to adhere to blood vessel endothelium and by helping their avoidance of immune surveillance. Thus, targeting the galectin-3 actions in the circulation may hold significant promise for future development of novel therapeutic agents to prevent metastasis and reduce cancer-associated fatality.
A comparative study of fracture in Al: quantum mechanical vs. empirical atomistic description
Qing Peng,Gang Lu
Physics , 2009, DOI: 10.1016/j.jmps.2011.01.008
Abstract: A comparative study of fracture in Al is carried out by using quantum mechanical and empirical atomistic description of atomic interaction at crack tip. The former is accomplished with the density functional theory (DFT) based Quasicontinuum method (QCDFT) and the latter with the original Quasicontinuum method (EAM-QC). Aside from quantitative differences, the two descriptions also yield qualitatively distinctive fracture behavior. While EAM-QC predicts a straight crack front and a micro-twinning at the crack tip, QCDFT finds a more rounded crack profile and the absence of twinning. Although many dislocations are emitted from the crack tip in EAM-QC, they all glide on a single slip plane. In contrast, only two dislocations are nucleated under the maximum load applied in QCDFT, and they glide on two adjacent slip planes. The electron charge density develops sharp corners at the crack tip in EAM-QC, while it is smoother in QCDFT. The physics underlying these differences is discussed.
Can vacancies lubricate dislocation motion in aluminum?
Gang Lu,Efthimios Kaxiras
Physics , 2002, DOI: 10.1103/PhysRevLett.89.105501
Abstract: The interaction of vacancy with dislocations in Al is studied using the Semidiscrete Variational Peierls-Nabarro model with ab initio determined gamma surface. For the first time, we confirm theoretically the so-called vacancy lubrication effect on dislocation motion in Al, a discovery that can settle a long-standing controversy in dislocation theory for fcc metals. We provide insights on the lubrication effect by exploring the connection between dislocation mobility and its core width. We predict an increased dislocation splitting in the presence of vacancy. We find that on average there is a weak repulsion between vacancies and dislocations which is independent of dislocation character.
Interaction of vacancies with grain boundary in aluminum: a first-principles study
Gang Lu,Nicholas Kioussis
Physics , 2001, DOI: 10.1103/PhysRevB.64.024101
Abstract: We present a theoretical study of the interaction of vacancies with a tilt grain boundary in aluminum based on the density functional theory. The grain boundary volume expansion and vacancy induced contraction are calculated and compared for the nearest-neighbor atoms from the defects, and the former is found to be smaller than the latter. The formation energy of a vacancy placed at various layers in the grain boundary has been calculated and we find that the grain boundary does not always act as sinks for vacancies. In fact, it costs more energy to form a vacancy at the boundary plane than in the bulk, although the rest of the grain boundary region does attract vacancies. The microscopic mechanisms of grain boundary sliding and migration are investigated thoroughly with and without a vacancy. We find that although the vacancy can hinder the grain boundary motion by tripling the energy barrier of sliding and migration, it can not inhibit or even delay the migration process. The vacancy placed at the first layer from the interface is found to be trapped at the layer and not able to follow the migrating interface.
An Overview of Multiscale Simulations of Materials
Gang Lu,Efthimios Kaxiras
Physics , 2004,
Abstract: Multiscale modeling of material properties has emerged as one of the grand challenges in material science and engineering. We provide a comprehensive, though not exhaustive, overview of the current status of multiscale simulations of materials. We categorize the different approaches in the spatial regime into sequential and concurrent, and we discuss in some detail representative methods in each category. We classify the multiscale modeling approaches that deal with the temporal scale into three different categories, and we discuss representative methods pertaining to the each of these categories. Finally, we offer some views on the strength and weakness of the multiscale approaches that are discussed, and touch upon some of the challenging multiscale modeling problems that need to be addressed in the future.
Hydrogen Embrittlement of Aluminum: the Crucial Role of Vacancies
Gang Lu,Efthimios Kaxiras
Physics , 2005, DOI: 10.1103/PhysRevLett.94.155501
Abstract: We report first-principles calculations which demonstrate that vacancies can combine with hydrogen impurities in bulk aluminum and play a crucial role in the embrittlement of this prototypical ductile solid. Our studies of hydrogen-induced vacancy superabundant formation and vacancy clusterization in aluminum lead to the conclusion that a large number of H atoms (up to twelve) can be trapped at a single vacancy, which over-compensates the energy cost to form the defect. In the presence of trapped H atoms, three nearest-neighbor single vacancies which normally would repel each other, aggregate to form a trivacancy on the slip plane of Al, acting as embryos for microvoids and cracks and resulting in ductile rupture along the these planes.
Constructing virtual Euler cycles and classes
Guangcun Lu,Gang Tian
Mathematics , 2006,
Abstract: The constructions of the virtual Euler (or moduli) cycles and their properties are explained and developed systematically in the general abstract settings.
The log term of Szego Kernel
Zhiqin Lu,Gang Tian
Mathematics , 2005,
Abstract: In this paper, we study the relations between the log term of the Szeg\"o kernel of the unit circle bundle of the dual line bundle of an ample line bundle over a compact K\"ahlermanifold. We proved a local rigidity theorem. The result is related to the classical Ramadanov Conjecture.
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