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Search Results: 1 - 10 of 45096 matches for " Yan Gu "
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Research on Transplanted Design of Mobile-Terminal-Based Educational Games  [PDF]
Yan Gu, Na Tian
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.25005
Abstract: The number of educational games developed in mobile terminals becomes more and more. The types can be divided into transplanted development and innovative development. Transplanted design is based on existed educational games, and the games are redesigned into mobile terminals, but they have problems about poor user experience and too many similarities between them. This paper analyses the causes of these phenomena and gives some suggestions. According to games from personal computers, their interaction styles should be redesigned.
Problems and Countermeasures in the Implementation of Sustainable Development Strategy for Environmental Protection Enterprises in the New Period  [PDF]
Yan Gu, Qingjun Meng
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.45027
Abstract: Our country has put forward a new orientation of green development and has supported the development of environmental protection enterprises. With the development of social economy and the improvement of people’s living standard, environmental protection enterprises are meeting new opportunities. However, there are still many problems in the development of environmental protection enterprises. For example, policy mechanism and legal system are not perfect, environmental protection enterprises are lack of innovation abilities and financing is difficult. A series of effective measures are needed, such as to sound legal system and policy mechanism, strengthen supervision. Environmental protection enterprises should strive to improve competitiveness and enhance cooperation with scientific research institutes, financial and other organizations. Only in this way, environmental protection enterprises are able to implement sustainable development strategy in the new period.
Non-Fermi Liquid Behavior in 3+1 Dimensions with PT Invariant Gauge Field: An Renormalization Group Approach
Gu Yan
Physics , 1994,
Abstract: We introduce a Hamiltonian coupled between a normal Fermi surface and a polarized Maxwell type gauge field.We adopt a {\it calibrated scaling } approach in order to be consistent with the results obtained at $2+1$ dimensions as well as the Weinberg's theo rem. Renormalization group equations are calculated by using a dimension regulator. It turns out that the gauge interaction is controlled by a non-trivial fixed point. The two-point Green's function can thus be calculated accurately in the low temperature limit and possesses a non-quasi particle pole which signals the break down of the Landau Fermi liquid theory. In addition,we show that the anomalous dimension of fermion field is in general gauge dependent. But it will survive under generic gauge choice due to the renormalization of the gauge fixing parameter.
The Motive of Enterprise Restructuring and Risk Prevention
Lanmin GU,Xianfeng YAN
Management Science and Engineering , 2012, DOI: 10.3968/2609
Abstract: Restructuring of the enterprise; Motivation; Risk
Analyse of Tax Risk for University-Owned Industry of China
Lanmin GU,Xianfeng YAN
Canadian Social Science , 2012, DOI: 10.3968/j.css.1923669720120803.3633
Abstract: As a class of business risk, tax risk of university industry is always a significant risk factor can not be ignored. This paper introduces the concept of tax risk, analyzes the causes of university, and proposes the measures to manage and control the tax risk of university industry, for reference. Key words: Tax risk; University industry; Reasons; Measures
Theoretic Insight into CO2 Reduction at Active Sites of Molybdenum and Tungsten Enzymes: a π Interaction between CO2 and Tungsten Bis-Dithiolene Complexes
Yong Yan,Jing Gu
Physics , 2014,
Abstract: Active sites of molybdenum and tungsten enzymes, particularly mononuclear tungsten formate dehydrogenase (FDH) have been theoretically investigated towards their interaction with CO2. Obvious {\pi} interaction has been found between the 2e reduced metallodithiole moiety and the molecular CO2. This weak {\pi} bonding is predicated both at gas phase, noted as -6.0 kcal/mol and aqueous solvation level, -3.6 kcal/mol. Such interaction is not only limited to CO2, but also to the CO2 reduced product, i.e. formate, in the form of anion- {\pi} interaction, noted as -6.8 kcal/mol and -4.1 kcal/mol respectively in gas and aqueous solvation model. The Bailar twisted angles from 60o to 0o, governing structure preference of tungsten dithiolene from octahedron to triangle prism in their restricted structures, has been explored to evaluate such {\pi} in-terrelations with CO2 and formate. An octahedral structure with 3 kcal/mol energy lower is preferred over the triangle prismatic when such interactions are concerned.
Superconductivity in a two-dimensional superconductor with Rashba and Dresselhaus spin-orbit couplings
Xu Yan,Qiang Gu
Physics , 2014, DOI: 10.1016/j.ssc.2014.02.013
Abstract: We present a general model with both Rashba and Dresselhaus spin-orbit couplings to describe a two-dimensional noncentrosymmetric superconductor. The combined effects of the two spin-orbit couplings on superconductivity are investigated in the framework of mean-field theory. We find that the Rashba and Dresselhaus spin-orbit couplings result in similar effects on superconductivity if they are present solely in the system. Mixing of spin-singlet and triplet pairings in electron band is induced under the assumption that each quasiparticle band is p-wave paired. If the two types of spin-orbit couplings appear jointly, both the singlet and triplet pairings are weakened and decreased down to their minimum values in the equal-Rashba-Dresselhaus case.
Coexistence of p-wave Cooper pairing and ferromagnetism
Xu Yan,Qiang Gu
Physics , 2013, DOI: 10.1016/j.physc.2013.03.016
Abstract: A two-band model for coexistence of p-wave superconductivity with localized ferromagnetism is studied using the equation of motion approach. It shows that ferromagnetic and superconducting states enhance each other but in a different way from that of the one-band model. The Curie temperature is not only determined by the exchange interactions between localized spins, but also can be increased with the coupling between electrons and spins, and with the p-wave Cooper-pairing interaction. These results are complementary to those of the one-band model, which suggest that the Curie temperature is unlikely to ever be below the superconducting transition temperature.
The effects of different sterilization methods on silk fibroin  [PDF]
Yahong Zhao, Xiaoli Yan, Fei Ding, Yumin Yang, Xiaosong Gu
Journal of Biomedical Science and Engineering (JBiSE) , 2011, DOI: 10.4236/jbise.2011.45050
Abstract: The aim of this study was to investigate the changes in the molecular structure and physiological activities of silk fibroin induced by three different sterilization methods (steam, gamma radiation and ethylene oxide) with different dose or time period of sterilization by means of Fourier transform infrared (FT-IR) spec-troscopy, X-ray diffraction, mechanical properties and assessment of molecular weight. The results showed that the steam sterilization darkened the color of silk fibroin and obviously affected the mechanical property; gamma irradiation slightly degraded the molecular weight of silk fibroin and the speed of degradation increased with increasing irradiation dose; and ethylene oxide almost had no influence on silk fibroin expect for some slight hydrolysis on mo-lecular weight. Because ethylene oxide sterilization had the smallest influence on the quality of silk fi-broin with compared to other sterilization methods, it could be used as an efficient method to make fibroin more suitable for the development of functional foods and cosmetics.
Chiral Discotic Columnar Phases in Liquid Crystals
Gu Yan,T. C. Lubensky
Physics , 1996,
Abstract: We introduce a model to describe columnar phases of chiral discotic liquid phases in which the normals to disc-like molecules are constrained to lie parallel to columnar axes. The model includes separate chiral interactions favoring, respectively, relative twist of chiral molecules along the axes of the columns and twist of the two-dimensional columnar lattice. It also includes a coupling between the lattice and the orientation of the discotic molecules. We discuss the instability of the aligned hexagonal lattice phase to the formation of a soliton lattice in which molecules twist within their columns without affecting the lattice and to the formation of a moir\'{e} phase consisting of a periodic array of twist grain boundaries perpendicular to the columns.
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