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Search Results: 1 - 10 of 53352 matches for " Xin Lu "
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The Present Situation, Problems and Countermeasures of the Exhibition Industry in Guangdong, China  [PDF]
Xin Lu, Miao Ouyang
Journal of Human Resource and Sustainability Studies (JHRSS) , 2016, DOI: 10.4236/jhrss.2016.43021
Abstract: As a kind of high efficiency, no pollution and with extremely strong industrial power to related industries, people pay more attention to the exhibition industry now. At present, exhibition industry of China is in a high-speed developmental period, and the International Convention and Exhibition Center is transferring to Chinese. As an economic strong province in China, Guangdong has ushered in a golden opportunity on exhibition industry, but it also faces great challenges. This mainly refers to the low level of informationization, specialization, marketization, the awful service quality, the lack of talents etc. This paper compares the exhibition’s situation of Guangdong province to that of other provinces, in order to find out the problem, and promote faster and better development of the exhibition industry in Guangdong.
A Research on Control Layers of SOEs and R & D Investment  [PDF]
Xin Lu, Ruihong Li
Modern Economy (ME) , 2018, DOI: 10.4236/me.2018.95059
Abstract: The pyramid structure of the SOEs along with the process of continuous reform has significantly affected the business activities and the decision-making behaviors of enterprises. Based on the data from 2007 to 2015, the paper validates the influence of the length of the control chain of SOEs on the R & D investment behavior of enterprises. Through analysis, we find that, with the control chain being lengthened, it suggests the significant decrease in R & D investment, but this correlation is not obvious for the central SOEs. Further research finds that, although there is no significant effect between the length of the control chain of the central SOEs and the R & D investment in the case of the whole sample, when the control layer is greater than median, the elongation of the control chain significantly inhibits the R & D investment of central SOEs and local SOEs. What’ s more, we find that the negative correlation of the number of control layers and R & D investment for local SOEs is only significant when the agent cost is lower.
A Review of the Classification of Enterprise Life Cycle  [PDF]
Xin Lu, Jun Wang
Modern Economy (ME) , 2018, DOI: 10.4236/me.2018.97076
Abstract: Due to the different life cycles of companies, there are significant differences in company size, growth, financing constraints, financing channels, growth, investment opportunities, competitive environment, and operational and financial risks. The company’s life cycle can be studied by micro-enterprises. Scholars in the fields of behavior, financial accounting, management accounting, and capital markets provide a dynamic perspective. Therefore, how to divide and measure the life cycle of a company is particularly important. This paper gives a detailed analysis of the division of the life cycle of domestic and foreign companies and their measurement methods. It has a certain guiding significance for interdisciplinary research in financial accounting, management accounting, and capital markets based on the enterprise life cycle theory.
Linked Ego Networks: Improving Estimate Reliability and Validity with Respondent-driven Sampling
Xin Lu
Statistics , 2012,
Abstract: Respondent-driven sampling (RDS) is currently widely used for the study of HIV/AIDS-related high risk populations. However, recent studies have shown that traditional RDS methods are likely to generate large variances and may be severely biased since the assumptions behind RDS are seldom fully met in real life. To improve estimation in RDS studies, we propose a new method to generate estimates with ego network data, which is collected by asking RDS respondents about the composition of their personal networks, such as "what proportion of your friends are married?". By simulations on an extracted real-world social network of gay men as well as on artificial networks with varying structural properties, we show that the new estimator, RDSI^{ego} shows superior performance over traditional RDS estimators. Importantly, RDSI^{ego} exhibits strong robustness to the preference of peer recruitment and variations in network structural properties, such as homophily, activity ratio, and community structure. While the biases of traditional RDS estimators can sometimes be as large as 10%~20%, biases of all RDSI^{ego} estimates are well restrained to be less than 2%. The positive results henceforth encourage researchers to collect ego network data for variables of interests by RDS, for both hard-to-access populations and general populations when random sampling is not applicable. The limitation of RDSI^{ego} is evaluated by simulating RDS assuming different level of reporting error.
Construction of Virtual Information Center in Scene Disposition of Unexpected Public Emergency Events  [PDF]
Jing-Xin Zhou, Tao Lu
iBusiness (IB) , 2011, DOI: 10.4236/ib.2011.31009
Abstract: Unexpected public emergency events have occurred frequently in recent years. How to deal with these events quickly and efficiently has become an important issue. First, the paper describes the importance of information in scene management of unexpected public emergency events, then points out the weaknesses and shortcomings of current emergency plans. After that a model of virtual information center for unexpected public emergency events is proposed. Finally, the paper describes how to build a virtual information center for assisting emergency work by a case.
Random Attractors for the Stochastic Discrete Long Wave-Short Wave Resonance Equations
Jie Xin,Hong Lu
Journal of Applied Mathematics , 2011, DOI: 10.1155/2011/452087
Abstract: We prove the existence of the random attractor for the stochastic discrete long wave-short wave resonance equations in an infinite lattice. We prove the asymptotic compactness of the random dynamical system and obtain the random attractor. 1. Introduction There has been considerable progress in the study of infinite-dimensinal dynamical systems in the past few decades (see [1–5]). Recently, the dynamics of infinite lattice systems has attracted a great deal of attention from mathematicians and physicists; see [6–11] and the references therein. Various properties of solutions for lattice dynamical systems (LDSs) have been extensively investigated. For example, the long-time behavior of LDSs was studied in [5, 10]. Lattice dynamical systems play an important role in their potential application such as biology, chemical reaction, pattern recognition and image processing, electrical engineering, and laser systems. However, a system in reality is usually affected by external perturbations within many cases that are of great uncertainty or random influence. These random effects are introduced not only to compensate for the defects in some deterministic models but also to explain the intrinsic phenomena. Therefore, there is much work concerning stochastic lattice dynamical systems. The study of random attractors gained considerable attention during the past decades; see [12] for a comprehensive survey. Bates et al. [13] first investigated the existence of global random attractor for a kind of first-order dynamic systems driven by white noise on lattice ; then, Lv and Sun [14] extended the results of Bates to the dimensional lattices. Stochastic complex Ginzburg-Landau equations, FitzHugh-Nagumo equation, and KGS equations in an infinite lattice are studied by Lv and Sun [15], Huang [16], and Yan et al. [17], respectively. The long wave-short wave (LS) resonance system is an important model in nonlinear science. Long wave-short wave resonance equations arise in the study of the interaction of surface waves with both gravity and capillary modes present and also in the analysis of internal waves as well as Rossby waves as in [18]. In the plasma physics they describe the resonance of the high-frequency electron plasma oscillation and the associated low-frequency ion density perturbation in [19]. Due to their rich physical and mathematical properties the long wave-short wave resonance equations have drawn much attention of many physicists and mathematicians. The LS system is as follows: where denotes a complex-valued vector and represents a real-valued function;
An Investigation of Mixed Student Reactions to CMC for Instructional Purposes
Xin-An (Lucian) Lu
Asian Journal of Information Technology , 2012,
Abstract: Research indicates that computer-mediated communication (CMC) is a great motivator of learning for the student (Gatlin-Watts et al., 1998). However, my experience communicating with students through the Web indicates very divided student reactions to this manner of communication. In view of a relative lack of literature in the area, this research investigates students` reactions to the Blackboard -facilitated CMC, their understanding of the potentials, problems and improvement of this CMC and possible factors that contribute to the mixed student reactions to the CMC. Population for this study was the nearly 100 students involved in my teaching which uses the e-learning technology of Blackboard .
The Web and a Sense of Home for Overseas Chinese Students in America
Xin-An (Lucian) Lu
Pakistan Journal of Social Sciences , 2012,
Abstract: NA
Spontaneous Broken Local Conformal Symmetry and Dark Energy Candidate
Liu, Lu-Xin
High Energy Physics - Phenomenology , 2008,
Abstract: The local conformal symmetry is spontaneously broken down to the Local Lorentz invariance symmetry through the approach of nonlinear realization. The resulting effective Lagrangian, in the unitary gauge, describes a cosmological vector field non-minimally coupling to the gravitational field. As a result of the Higgs mechanism, the vector field absorbs the dilaton and becomes massive, but with an independent energy scale. The Proca type vector field can be modelled as dark energy candidate. The possibility that it further triggers Lorentz symmetry violation is also pointed out.
Chun-Xin Lu
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812021460
Abstract: In the title complex, [CuBr2(C14H11BrN4O)2], the CuII ion is located on an inversion centre and is coordinated by two ketonic O atoms, two N atoms and two Br atoms, forming a distorted octahedral coordination environment. The two carbonyl groups are trans positioned with C=O bond lengths of 1.256 (5) , in agreement with a classical carbonyl bond. The Cu—O bond length is 2.011 (3) . The two bromobenzyl rings are approximately parallel to one another, forming a dihedral angle of 70.1 (4)° with the coordination plane.
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