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Search Results: 1 - 10 of 63897 matches for " Yu Jiao "
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Protection and Renewal of Historic Blocks Based on Architectural Typology  [PDF]
Hui Yu, Xinjie Sui, Mengfei Jiao
Art and Design Review (ADR) , 2018, DOI: 10.4236/adr.2018.63011
Abstract: With the promotion and development of urbanization, historical blocks, with their historical value and particularity, have become the elements to avoid the homogenization of cities, and have been paid more and more attention by scholars in various fields. Taking three different types of historical blocks in Dalian (Nanshan District, Fengming Street, Dongguan Street) as examples, on the basis of typology, this paper compares different blocks, and puts forward such as repair prototype, integrate plane texture, remodel courtyard space and so on, in order to achieve the goal of protecting the historic district.
Semi Hopfian and semi co-Hopfian modules over generalized power series rings
Yu-Juan Jiao
International Journal of Algebra , 2012,
Abstract:
Emergence of integer quantum Hall effect from chaos
Chushun Tian,Yu Chen,Jiao Wang
Physics , 2015,
Abstract: We present an analytic microscopic theory showing that in a large class of spin-$\frac{1}{2}$ quasiperiodic quantum kicked rotors, a dynamical analog of the integer quantum Hall effect (IQHE) emerges from an intrinsic chaotic structure. Specifically, the inverse of the Planck's quantum ($h_e$) and the rotor's energy growth rate mimic the `filling fraction' and the `longitudinal conductivity' in conventional IQHE, respectively, and a hidden quantum number is found to mimic the `quantized Hall conductivity'. We show that for an infinite discrete set of critical values of $h_e$, the long-time energy growth rate is universal and of order of unity (`metallic' phase), but otherwise vanishes (`insulating' phase). Moreover, the rotor insulating phases are topological, each of which is characterized by a hidden quantum number. This number exhibits universal behavior for small $h_e$, i.e., it jumps by unity whenever $h_e$ decreases, passing through each critical value. This intriguing phenomenon is not triggered by the like of Landau band filling, well-known to be the mechanism for conventional IQHE, and far beyond the canonical Thouless-Kohmoto-Nightingale-Nijs paradigm for quantum Hall transitions. Instead, this dynamical phenomenon is of strong chaos origin; it does not occur when the dynamics is (partially) regular. More precisely, we find that, for the first time, a topological object, similar to the topological theta angle in quantum chromodynamics, emerges from strongly chaotic motion at microscopic scales, and its renormalization gives the hidden quantum number.Our analytic results are confirmed by numerical simulations.Our findings indicate that rich topological quantum phenomena can emerge from chaos and might point to a new direction of study in the interdisciplinary area straddling chaotic dynamics and condensed matter physics.
RISN: An Efficient Sensor Network Overlay with Support for Autonomous and Distributed Applications  [PDF]
Evens Jean, Ingmar Rauschert, Robert T. Collins, Ali R. Hurson, Sahra Sedigh, Yu Jiao
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2011, DOI: 10.4236/ijcns.2011.41001
Abstract: Once deployed, sensor networks are capable of providing a comprehensive view of their environment. However, since the current sensor network paradigm promotes isolated networks that are statically tasked, the full power of the harnessed data has yet to be exploited. In recent years, users have become mobile enti-ties that require constant access to data for efficient and autonomous processing. Under the current limita-tions of sensor networks, users would be restricted using only a subset of the vast amount of data being col-lected; depending on the networks they are able to access. Through reliance on isolated networks, prolifera-tion of sensor nodes can easily occur in any area that has high appeals to users. Furthermore, support for dy-namic tasking of nodes and efficient processing of data is contrary to the general view of sensor networks as subject to severe resource constraints. Addressing the aforementioned challenges requires the deployment of a system that allows users to take full advantage of data collected in the area of interest to their tasks. Such a system must enable interoperability of surrounding networks, support dynamic tasking, and swiftly react to stimuli. In light of these observations, we introduce a hardware-overlay system designed to allow users to efficiently collect and utilize data from various heterogeneous sensor networks. The hardware-overlay takes advantage of FPGA devices and the mobile agent paradigm in order to efficiently collect and process data from cooperating networks. The computational and power efficiency of the prototyped system are herein demonstrated. Furthermore, as a proof-of-concept, we present the implementation of a distributed and autonomous visual object tracker implemented atop the Reconfigurable and Interoperable Sensor Network (RISN) showcasing the network’s ability to support ad-hoc agent networks dedicated to user’s tasks.
Effect of neuroserpin in a neonatal hypoxic-ischemic injury model ex vivo
Jiao Ma,Dan Yu,Yu Tong,Meng Mao
Biological Research , 2012,
Abstract: Hypoxia-ischemia (HI) occurring in immature brains stimulates the expression of tissue-type plasminogen activator (tPA). Neuroserpin is a selected inhibitor of tPA in the central nerves system. However, the role that neuroserpin plays and the possible mechanisms involved during neonatal HI are poorly defined. In this study, an oxygen-glucose deprivation and reoxygenation (OGD/R) model was generated with cultured rat cortical neurons mimicking neonatal HI injury ex vivo, and an acute neuronal excitatory injury was induced by exposure to a high concentration of N-methyl-D-aspartic acid (NMDA). Cells received either neuroserpin or MK-801, an antagonist of the NMDA receptor, during OGD/R, and were incubated with or without neuroserpin after NMDA exposure. Cell viability and morphology were detected by a Cell Counting Kit-8 and immunohistochemical staining, respectively. TPA expression and activity were also assessed. We found that MK-801 alleviated injuries induced by OGD/R, suggesting an excitatory damage involvement. Neuroserpin provided a dose-dependent neuroprotective effect in both OGD/R and acute excitatory injuries by inhibiting the activity of tPA, without affecting neuronal tPA expression. Neuroserpin protected neurons against OGD/R even after a delayed administration of 3h. Collectively, our data indicate that neuroserpin protects neurons against OGD/R. mainly by inhibiting tPA-mediated acute neuronal excitotoxicity.
Limit Cycle Bifurcations in a Class of Cubic System near a Nilpotent Center  [PDF]
Jiao Jiang
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.37115
Abstract: In this paper we deal with a cubic near-Hamiltonian system whose unperturbed system is a simple cubic Hamiltonian system having a nilpotent center. We prove that the system can have 5 limit cycles by using bifurcation theory.
Study of Informative Advertising Competition Model in Duopolistic Market with Relative Profit Object  [PDF]
Jiao Lu
Journal of Service Science and Management (JSSM) , 2017, DOI: 10.4236/jssm.2017.102009
Abstract:
To study how the relative profit object influences duopolistic retailers’ advertising decisions, this paper adds the relative profit object on the Hotelling Model to study its influence on advertising decisions. Through the calculation and analysis of the advertising competition model, we found that the balanced advertising level and product price is positively related to product differentiation level. The relationship between balanced profit and product differentiation level is related to the range of each variable. The balanced product price is positively related to advertising cost, while the balanced advertising level and profit is negatively related to advertising cost. The balanced product price, advertising level and profit are negatively related to relative profit ratio. Commonly, the higher the relative object ratio, the advertising level should be higher. This paper gets the opposite conclusion. Through analysis and discussion, we found that this is mainly influenced by the advertising cost level. As in this paper the advertising cost level is restricted to be high, enterprises will choose to raise price for more profit and lower advertising level to reduce cost while the relative profit ratio increases.
Are Mispricings Long-Lasting or Short-Lived? Evidence from S & P 500 Index ETF Options  [PDF]
Feng Jiao
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.83027
Abstract: A rapidly growing literature has documented evidences suggesting the mispricing of options. Building on recent results of option pricing bounds imposed by stochastic dominance, this paper examines the time-series proprieties of such mispricing. In an application to high-frequency bid/ask quotes of S & P 500 index ETF options, this paper provides evidences that most violations of the stochastic dominance bounds last no more than 10 trading hours. The typical duration of mispricing is even shorter for near to maturity options. The results imply that the observed widespread mispricing in options might be the result of temporary inefficiency (e.g. transaction costs, overreaction, liquidity etc.) rather than a model misspecification, such as estimation biases of the parameters, or an overlooked persistent risk factor.
Analysis of the Value of Brand Equity from the Perspective of Consumer Psychology  [PDF]
Lintong Jiao
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.612007
Abstract: Brand equity is an important object of study in the field of marketing and consumer psychology. This paper proceeds from the three constituent elements of brand equity, and taking “Xiang Piao Piao” brand as an example, expounds the role of these factors such as brand awareness, perceived quality, brand preferences resulting from consumer subjective factors in enhancing the value of brand equity. Combining the information from “Xiang Piao Piao Foods Co., Ltd. initial public offering of shares and listing prospectus” published by China Securities Regulatory Commission, this paper analyzes the important role of brand equity for promoting the development of enterprise.
How Institutional Distance and International Experience Affect the Success or Failure of Foreign Direct Investment by Chinese Enterprises?  [PDF]
Jiao Yang
American Journal of Industrial and Business Management (AJIBM) , 2019, DOI: 10.4236/ajibm.2019.93035
Abstract:
With the sample of 2571 foreign direct investment of multinational enterprises in China from 2005 to 2016, the Logit model is used in this paper to empirically test the influence of host country system differences and international experience on the success or failure of foreign direct investment by Chinese enterprises. Our empirical findings are: the greater the difference in institutional distance (whether positive or negative), the larger the possibility that foreign direct investment by Chinese enterprises will fail, that is, the institutional distance is featured by “symmetric effect” on the success or failure of foreign direct investment by Chinese enterprises; as a “distance bridging” variable, international experience has regulatory effect that weakens the negative effect of institutional distance on Chinese enterprises’ overseas direct investment success rate in the negative institutional distance, but has no regulating effect in the positive institutional distance, which is featured by “asymmetric effect”; the adjustment of institutional distance to the success or failure of foreign direct investment by Chinese enterprises has industry characteristics. When Chinese enterprises directly invest in “sensitive” industries, the adjustment effect of international experience on the relationship between negative institutional distance and investment success or failure is less obvious than that in “non-sensitive” industries. In addition, the sample data of foreign investment by China’s multinational corporation in the “Belt and Road” countries are examined, which is consistent with conclusions. The research results also show that the host country’s dependence on trade, infrastructure and strategic resources are all important factors affecting the success or failure of foreign direct investment of Chinese multinational enterprises. According to the above conclusions, some suggestions and countermeasures are proposed in this paper.
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