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Search Results: 1 - 10 of 120185 matches for " Ningning Wang "
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The Impact of Complaints between Frontline Service Employees on Consumers—Based on Critical Incident Technique  [PDF]
Jihua Zhang, Ningning Wang
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.83054
Abstract: The critical incident technique was adopted to collect 174 critical events which were divided into 3 categories and 9 types about the complaint behaviors among the front-line service employees witnessed by the consumers. In addition, this paper discusses the influence mechanism of employees complaint behavior on consumers and enriches the theory research of employees' complaints and brand internalization.
The Impact of Consumers Witness Front-Line Service Employee Complaints on Corporate Brand Attitudes  [PDF]
Jihua Zhang, Ming Tan, Ningning Wang
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.73037
Abstract: In the past, the research on complaints mainly focused on employee-employer dichotomy, focusing on the impact of employee complaints on employee performance. But in the actual work, front-line service workers and consumers have a lot of service contacts. If consumers witness complaints from front-line service workers, what impact will it have on corporate brand attitude? Based on the third-party perception perspective and the theory of moral justice, with perception of corporate morality as the mediating variable, this paper verifies that perceived corporate controllability by first-line service employees’ complaints can significantly affect consumer brand attitude, and introduces the boundary condition of perceived employee complaints. When perceived employee complaints are health factors, the more controllable the first-line service employees’ complaints are perceived. The higher the perceived corporate ethics, the lower the consumer brand attitude. When perceived employee complaints are motivating factors, there is no difference in the impact of perceived corporate controllability and low perceived employee complaints on consumer brand attitude. The paper examines the impact of corporate controllability on consumers perceived by the complaints of front-line service employees witnessed by consumers. It also studies the spillover effect of employee complaints from the perspective of third-party perception, which has important guiding value for guiding the management of front-line service employees and sustainable development.
Topological winding properties of spin edge states in Kane-Mele graphene model
Zhigang Wang,Ningning Hao,Ping Zhang
Physics , 2009, DOI: 10.1103/PhysRevB.80.115420
Abstract: We study the spin edge states in the quantum spin-Hall (QSH) effect on a single-atomic layer graphene ribbon system with both intrinsic and Rashba spin-orbit couplings. The Harper equation for solving the energies of the spin edge states is derived. The results show that in the QSH phase, there are always two pairs of gapless spin-filtered edge states in the bulk energy gap, corresponding to two pairs of zero points of the Bloch function on the complex-energy Riemann surface (RS). The topological aspect of the QSH phase can be distinguished by the difference of the winding numbers of the spin edge states with different polarized directions cross the holes of the RS, which is equivalent to the Z2 topological invariance proposed by Kane and Mele [Phys. Rev. Lett. 95, 146802 (2005)].
Topological phases and fractional excitations of the exciton condensate in a special class of bilayer systems
Ningning Hao,Ping Zhang,Yupeng Wang
Physics , 2010, DOI: 10.1103/PhysRevB.84.155447
Abstract: We study the exciton condensate in zero temperature limit in a special class of electron-hole bilayer systems adjacent to insulating ferromagnetic films. With the self-consistent mean-field approximation, we find that the Rashba spin-orbit interaction in the electron and hole layers can induce the p \pm ip or p pairing states depending on the different magnetization of the overlapped ferromagnetic films. Correspondingly, the topologically nontrivial or trivial phases emerge. Furthermore, in the topologically nontrivial phase, the quasiparticle excitations of the U(1) vortex are attached to fractional quantum numbers and obey Abelian statistics.
Oriented gap opening in the magnetically ordered state of Iron-pnicitides: an impact of intrinsic unit cell doubling on the $Fe$ square lattice by $As$ atoms
NingNing Hao,Yupeng Wang,Jiangping Hu
Physics , 2012, DOI: 10.1209/0295-5075/104/57007
Abstract: We show that the complicated band reconstruction near Fermi surfaces in the magnetically ordered state of iron-pnictides observed by angle-resolved photoemission spectroscopies (ARPES) can be understood in a meanfield level if the \emph{intrinsic unit cell doubling} due to As atoms is properly considered as shown in the recently constructed S$_{4}$ microscopic effective model. The (0,$\pi$) or ($\pi$,0) col-linear antiferromagnetic (C-AFM) order does not open gaps between two points at Fermi surfaces linked by the ordered wave vector but forces a band reconstruction involving four points in unfolded Brillouin zone (BZ) and gives rise to small pockets or hot spots. The S$_4$ symmetry naturally chooses a staggered orbital order over a ferro-orbital order to coexist with the C-AFM order. These results strongly suggest that the kinematics based on the S$_{4}$ symmetry captures the essential low energy physics of iron-based superconductors.
Studies on the overexpression of the soybean GmNHX1 in Lotus corniculatus: The reduced Na+ level is the basis of the increased salt tolerance
Yanxiang Sun,Dan Wang,Yanling Bai,Ningning Wang,Yong Wang
Chinese Science Bulletin , 2006, DOI: 10.1007/s11434-006-1306-y
Abstract: The full length cDNA coding for a novel vacuolar Na+/H+ antiporter (GmNHX1) was cloned from soybean and determined to consist of 2591 bp with a 5′-untranslated region of 464 bp, an open reading frame (ORF) of 1641 bp, and a 3′-untranslated region of 486 bp. The deduced protein sequence contains 546 aa with the typical characters of the vacuolar Na+/H+ antiporters, and shares high similarity with that of AtNHX1, OsNHX1 and AgNHX1. The soybean genome showed a single copy of the GmNHX1 gene. Northern blot analysis demonstrated that the expression of the GmNHX1 was tissue-specific, increased by ABA treatment, NaCl, KCl, LiCl and dehydration stress, and lower in leaves but higher in roots and hypocotyls of salt-tolerant than salt-sensitive cultivars. The GmNHX1 was overexpressed under the control of a tandem cauliflower mosaic virus (CaMV) 35S promoter in the model leguminous plant Lotus corniculatus L. and conferred salt-tolerance of the transgenic plants. Measurements of Na+ and K+ contents in both roots and shoots demonstrated that the plantlets of GmNHX1-overexpressing lines had lower Na+ and K+ content, and higher K+/Na+ ratio than the controlled lines that were transformed with the empty vector, which indicates that the salt-tolerance conferred by GmNHX1 is closely related with decreased accumulation of Na+ in the transgenic plants.
Topological edge states and quantum Hall effect in the Haldane model
Ningning Hao,Ping Zhang,Zhigang Wang,Wei Zhang,Yupeng Wang
Physics , 2008, DOI: 10.1103/PhysRevB.78.075438
Abstract: We study the topological edge states of the Haldane's graphene model with zigzag/armchair lattice edges. The Harper equation for solving the energies of the edge states is derived. The results show that there are two edge states in the bulk energy gap, corresponding to the two zero points of the Bloch function on the complex-energy Riemann surface. The edge-state energy loops move around the hole of the Riemann surface in appropriate system parameter regimes. The quantized Hall conductance can be expressed by the winding numbers of the edge states, which reflects the topological feature of the Haldane model.
Fractional topological excitations and quantum phase transition in a bilayer 2DEG adjacent to a superconductor film
Ningning Hao,Wei Zhang,Zhigang Wang,Yupeng Wang,Ping Zhang
Physics , 2009, DOI: 10.1103/PhysRevB.81.125301
Abstract: We study a bilayer two-dimension-electron-gas (2DEG) adjacent to a type-II superconductor thin film with a pinned vortex lattice. We find that with increasing interlayer tunneling, the system of half filling presents three phases: gapped phase-I (topological insulator), gapless critical phase-II (metal), and gapped phase-III (band insulator). The Hall conductance for phase-I/III is 2/0 $e^{2}/h$, and has non-quantized values in phase-II. The excitation (response to topological defect, a local vortex defect) in these three phases shows different behaviors due to the topological property of the system, including fractional charge $e/2$ for each layer in phase-I. While in the case of quarter filling, the system undergoes a quantum phase transition from metallic phase to topological insulator phase (with excitation of fractional charge $e/4$).
The Modified Kadomtsev-Petviashvili Equation with Binary Bell Polynomials  [PDF]
Ningning Hu, Shufang Deng
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.27065

Binary Bell Polynomials play an important role in the characterization of bilinear equation. The bilinear form, bilinear B?cklund transformation and Lax pairs for the modified Kadomtsev-Petviashvili equation are derived from the Binary Bell Polynomials.

Convenient Way of Extend Linear Expenditure System Modeling without Regression  [PDF]
Ningning Song, Yiqing Liu
Open Journal of Statistics (OJS) , 2015, DOI: 10.4236/ojs.2015.56055

Extend Linear Expenditure System model is a collection of multiple linear models, and modeling is a clearly tedious process. The innovation of this paper is trying to find a simple way of ELES modeling, which means, in order to omit the modeling process one by one, we try to use Excel functionality to create a model workplace. As long as you replace the original sample data in the workspace, you can get the results you want.

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