Guangning Zhang, Xinxin Zhang and Yingying Wang
This study aims to investigate the effect of perceived insider status to employees' innovative behavior, the mediating role of knowledge sharing and the moderating role of…
Abstract
Purpose
This study aims to investigate the effect of perceived insider status to employees' innovative behavior, the mediating role of knowledge sharing and the moderating role of organizational innovation climate in the relationship between knowledge sharing and employees' innovative behavior.
Design/methodology/approach
This study adopted questionnaires to gather data. The sample of 341 employees working in diverse organizations in China was applied to examine the hypotheses.
Findings
The results indicate that perceived insider status is positively related to employees' innovative behavior and knowledge sharing mediates the relationship between perceived insider status and employees' innovative behavior. In addition, organizational innovation climate enhances the relationship of knowledge sharing and employees' innovative behavior.
Originality/value
This study builds a system from psychological aspect to behavior, which includes the mechanism of the influence of perceived insider status on employees' innovative behavior and a cross-level analysis of the influence of organizational innovation climate on employees' innovative behavior, breaking through the previous research paradigm of a single level of climate and employee behavior.
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Hongwei Yang, Yingying Wang, Meng Zhang and Lianchun Long
This paper aims to provide a symplectic conservation numerical analysis method for the study of nonlinear LC circuit.
Abstract
Purpose
This paper aims to provide a symplectic conservation numerical analysis method for the study of nonlinear LC circuit.
Design/methodology/approach
The flux linkage control type nonlinear inductance model is adopted, and the LC circuit can be converted into the Hamiltonian system by introducing the electric charge as the state variable of the flux linkage. The nonlinear Hamiltonian matrix equation can be solved by perturbation method, which can be written as the sum of linear and nonlinear terms. Firstly, the linear part can be solved exactly. On this basis, the nonlinear part is analyzed by the canonical transformation. Then, the coefficient matrix of the obtained equation is still a Hamiltonian matrix, so symplectic conservation is achieved.
Findings
Numerical results reveal that the method proposed has strong stability, high precision and efficiency, and it has great advantages in long-term simulations.
Originality/value
This method provides a novel and effective way in studying the nonlinear LC circuit.
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Yingying Wang and Jiansheng Yuan
The theoretical method of converting the magnetic circuit into an electric circuit is mature, but the way to determine the inductances in the electric circuit is not reliable…
Abstract
Purpose
The theoretical method of converting the magnetic circuit into an electric circuit is mature, but the way to determine the inductances in the electric circuit is not reliable, especially for the core working in saturation status, and it is impossible to determine the inductances by the transformer terminal measurements, as the measurement information is not enough to determine a number of inductances. This paper aims to propose an approach of calculating the reluctances.
Design/methodology/approach
In this paper, an approach of calculating the reluctances is proposed based on the numerical simulation of magnetic field in transformer with different values of current excitation. The reluctance of a core segment or air region as a branch of magnetic circuit is obtained by the magnetic energy and magnetic flux. By this way, all the reluctances as function of flux can be determined, and then the inductances can be determined. The reluctances and equivalent electric circuit of three-phase integrative transformer is determined, and its validation is proved in the paper.
Findings
The single phase example shows that the proposed method has a good performances on analysis of the inrush current in deep saturation. The peak value of the inrush current derived from the proposed approach matches well with the results obtained by coupled circuit-FEM analysis, and the difference is about 4.8 per cent. For studies on dual models of single phase transformers, the leakage inductances have important effects on the peak value of the inrush current. The reluctances of three-phase transformer are calculated, and the equivalent circuit simulation results are slightly smaller than the coupled circuit-FEM simulation results.
Originality/value
Approach of calculating the reluctances based on the numerical simulation of magnetic field in transformer is proposed. The magnetic core and air space are divided into several segments, and the reluctance for each segment is calculated based on the energy in the region and the flux of the cross-sectional area. By applying various excitation currents, all the reluctances as function of flux can be determined, and then all the non-linear inductances including the non-linear leakage inductances are obtained. The proposed approach is reliable to determine a number of inductances in the dual electric circuit, especially for deep saturation status.
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Yongjian Ke, Xinbo Zhao, Yingying Wang and ShouQing Wang
The purpose of this paper is to help domestic private enterprises (DPEs) identify their strengths, weaknesses, opportunities, and threats (SWOT) in developing infrastructure…
Abstract
Purpose
The purpose of this paper is to help domestic private enterprises (DPEs) identify their strengths, weaknesses, opportunities, and threats (SWOT) in developing infrastructure projects in China.
Design/methodology/approach
The paper draws on extensive literature reviews coupled with brainstorming and interviews methodologies to compile a list of SWOT factors for DPEs in developing infrastructures. To validate the significance of the identified SWOT list, a questionnaire survey is thus carried out.
Findings
The paper identifies 16 strengths, 15 weaknesses, 16 opportunities, and 21 threats for DPEs in developing infrastructure projects in China. The opinions of respondents from different sectors are sought and evaluated to obtain the relative significance of these factors. A set of major SWOT hypotheses is then derived using factor analysis.
Research limitations/implications
The paper is limited to identifying SWOT factors in common, therefore the next step should be proposing an adjustment framework to support decision marking.
Practical implications
These findings should provide a valuable reference not only for DPEs but also for foreign investors who are planning to invest in infrastructure projects in China.
Originality/value
The investors in both rounds of infrastructure investments in China in the last two decades have limitations. Foreign investors acting as the major player in the first round usually charge higher and prefer operating projects in more developed regions, while state‐owned enterprises as the principal player in the second round are inefficient in the operation and management, which largely restrained the advantages of public‐private partnership model. Therefore, there is an urgent need to explore the potential of DPEs, another potential major player in developing infrastructure projects. To this end, this paper provides valuable information through a comprehensive SWOT analysis to the DPEs.
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Fang Wang, Xiaoning Xue and Yingying Wang
Maintaining a city’s identity and locality is an urgent problem in urban construction. Historical districts are very important parts of a city. However, non-heritage buildings…
Abstract
Purpose
Maintaining a city’s identity and locality is an urgent problem in urban construction. Historical districts are very important parts of a city. However, non-heritage buildings, which make a significant contribution to the character and appearance of historical areas, are facing arbitrary demolition. They are more often ignored compared with buildings on the protection list. The paper aims to discuss these issues.
Design/methodology/approach
This paper chooses two historic blocks in Wuxi, in which 256 non-heritage buildings were examined, the SPSS method and the AHP method are used to find renewal modes for the buildings that had not finished updates, and the two blocks are then used as practical cases to validate the matching results.
Findings
In conclusion, on the one hand, according to different building categories, different renewal modes are found. On the other hand, this study finds differences in the renewal modes of different historic districts.
Originality/value
The study shows a renewal method for non-heritage buildings, which require attention due to their dangerous situation, as these buildings in historical districts also contribute to a city’s uniqueness and locality. These results should be helpful in the planning and practices for urban historical districts.
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Xinran Zhao, Yingying Pang, Gang Wang, Chenhui Xia, Yuan Yuan and Chengqian Wang
This paper aims to realize the vertical interconnection in 3D radio frequency (RF) circuit by coaxial transitions with broad working bandwidth and small signal loss.
Abstract
Purpose
This paper aims to realize the vertical interconnection in 3D radio frequency (RF) circuit by coaxial transitions with broad working bandwidth and small signal loss.
Design/methodology/approach
An advanced packaging method, 12-inch wafer-level through-mold-via (TMV) additive manufacturing, is used to fabricate a 3D resin-based coaxial transition with a continuous ground wall (named resin-coaxial transition). Designation and simulation are implemented to ensure the application universality and fabrication feasibility. The outer radius R of coaxial transition is optimized by designing and fabricating three samples.
Findings
The fabricated coaxial transition possesses an inner radius of 40 µm and a length of 200 µm. The optimized sample with an outer radius R of 155 µm exhibits S11 < –10 dB and S21 > –1.3 dB at 10–110 GHz and the smallest insertion loss (S21 = 0.83 dB at 77 GHz) among the samples. Moreover, the S21 of the samples increases at 58.4–90.1 GHz, indicating a broad and suitable working bandwidth.
Originality/value
The wafer-level TMV additive manufacturing method is applied to fabricate coaxial transitions for the first time. The fabricated resin-coaxial transitions show good performance up to the W-band. It may provide new strategies for novel designing and fabricating methods of RF transitions.
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Although an important facet of modernist architecture in which function plays a prominent role, building flexibility is not entirely a new concept. Its relevance transcends…
Abstract
Although an important facet of modernist architecture in which function plays a prominent role, building flexibility is not entirely a new concept. Its relevance transcends generations, allowing space and structure to evolve through time. This paper investigates the relationship among main building structures, infill elements, and space by studying examples in ancient Chinese architecture. It reveals the role of building owners, users, and craftsmen from a survey of historical documentation. In studying these examples, it is concluded that craftsmen in ancient China were involved not only during the construction phase but throughout the period of use as well. Thus, in select cases, the relationship between craftsmen and owners or users had been preserved for generations. Finally, this paper suggests potential strategies for the building industry and technology in the move towards sustainable development.
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Yingying Li, Lanlan Liu, Jun Wang, Song Xu, Hui Su, Yi Xie and Tangqing Wu
The purpose of this paper is to study the corrosion behavior of Q235 steel in saturated acidic red and yellow soils.
Abstract
Purpose
The purpose of this paper is to study the corrosion behavior of Q235 steel in saturated acidic red and yellow soils.
Design/methodology/approach
The corrosion behavior of Q235 steel in saturated red and yellow soils was compared by weight-loss, SEM/EDS, 3D ultra-depth microscopy and electrochemical measurements.
Findings
Rp of the steel gradually increases and icorr gradually decreases in both the red and yellow soils with time. The Rp of the steel in the red soil is lower, but its icorr is higher than that in the yellow soil. The uniform corrosion rate, diameter and density of the corrosion pit on the steel surface in the red soil are greater than those in the yellow soil. Lower pH, higher contents of corrosive anions and high-valence Fe oxides in the red soil are responsible for its higher corrosion rates and local corrosion susceptibility.
Originality/value
This paper investigates the difference in corrosion behavior of carbon steel in saturated acidic red and yellow soils, which can help to understand the mechanism of soil corrosion.