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The purpose of this paper is to develop a numerical simulation method based on the transient upstream finite element method (FEM) and Schottky emission theory to reveal the distribution characteristics of space charge in oil-paper insulation.

The main insulation medium of the converter transformer in high voltage direct current transmission is oil-paper insulation. However, the influence of space charge is difficult to be fully considered in the insulation design and simulation of converter transformers. To reveal the influence characteristics of the space charge, this paper proposes a numerical simulation method based on Schottky emission theory and the transient upstream FEM. This method considers the influence of factors, such as carrier mobility, carrier recombination coefficient, trap capture coefficient and diffusion coefficient on the basis of multi-physics field coupling calculation of the electric field and fluid field.

A numerical simulation method considering multiple charge states is proposed for the space charge problem in oil-paper insulation. Meanwhile, a space charge measurement platform based on the electrostatic capacitance probe method for oil-paper insulation structure is built, and the effectiveness and accuracy of the numerical simulation method is verified.

A variety of models are calculated and analyzed by the numerical simulation method in this paper, and the distribution characteristics of the space charge and total electric field in oil-paper insulation medium with single-layer, polarity reversal of plate voltage and double-layer are obtained. The research results of this paper have the guiding significance for the engineering application of oil-paper insulation and the optimal design of converter transformer insulation.

The purpose of this paper is numerical calculation of total electric field in oil-paper insulation. Now, there is no effective method to consider the influence of space charges when calculating the total electric field distribution in the main insulation system of the valve-side winding of an ultra-high-voltage direct current converter transformer.

To calculate the total electric field in an oil-paper insulation system, a new simulation method in single-layer oil-paper insulation based on the transient upstream finite element method (TUFEM) is proposed, in which the time variable is considered. The TUFEM is used to calculate the total electric field in an oil-paper insulation system by considering the move law of space charges. The simulation method is verified by comparing the simulation results to the test data. The move law of space charges and distribution characteristics of the electric field under difference voltage values in single-layer oil-paper insulation were presented.

The results show that the TUFEM has an excellent accuracy compared with the test data. When carrier mobility is a constant, the time to reach the steady state is inversely correlated with the initial electric field intensity, and the distortion rate of the internal total electric field is positively correlated with the initial electric field intensity.

This paper provides an exploratory research on the simulation of space charge transport phenomenon in oil-paper and has guiding significance to the design of oil-paper insulation.

This paper aims to examine how the law may play a role in mediation by paying special attention to how the law is excluded from and included in the process of court mediation in China.

Hundred model court mediation cases selected by the Supreme People’s Court of China were analysed and reviewed.

The law is relevant in Chinese-style court mediation in four ways: first, judge-mediators are intended to use mediation to avoid resolving legal difficulties or challenges; second, judge-mediators consult the law to anticipate the losing party and the potential negative effects that might result from the adjudication; third, judge-mediators refer to the law to propose a mediation scheme or plan to guide the parties to settle; and fourth, judge-mediators would use the law as a bargaining chip in various ways to induce the parties to settle.

Standards should be set out for the use of law in the mediation process to standardise judge-mediators’ actions, to ensure that the law is not used coercively to push settlement, which would undermine the parties’ self-determination in mediation.

This paper provides an original understanding of how law affects the process, the outcomes and, ultimately, the nature of settlements that parties achieve through court mediation in China. This study contributes to the literature that argues that ethical norms and legal standards should be set to direct those legal evaluations.

This study examines the heterogeneous correlations between rural farmers' land renting behavior and their grain production when they experienced a significant price decline.

We used well-timed panel data obtained from a two-round survey held in 2013 and 2017 among 621 households in the North China Plain. The empirical analyses were conducted by using the pooled ordinary least squares (OLS) and fixed effects models.

Rural tenants were having heterogeneous responses in land renting behavior and agricultural production when there was a price decline. A group of optimistic tenants (as professional farmers) were more likely to enlarge the farm scale for grain production through land rental markets but decrease variable investment levels (and subsequently decreased productivity) to cope with price decline. In contrast, nonprofessional farmers (the other rural tenants) were rather pessimistic about market performance, and they significantly decreased their grain production area to cope the price decline, but there was no decrease in grain productivity through reducing variable inputs.

This study contributes to the extant literature on the relationship between farmers' land renting-in behavior and agricultural production. By dividing the tenants into professional and nonprofessional farmers, we argue that there is a significant heterogeneous correlation between rural tenants' land renting behavior and grain production when farmers experience a price decline.

In China's urban context of labor retrenchment, women are faring poorly relative to their male counterparts. Is the same true in China's incipient, dynamic, and expanding legal profession? Findings from four sources of quantitative data suggest that gender inequality in China's private and highly market-driven legal profession is a microcosm of larger patterns of female disadvantage in China's evolving urban labor market. Although employment opportunities for women lawyers have greatly expanded quantitatively, their careers are qualitatively less successful than those of their male counterparts in terms of both income and partnership status. In the Chinese bar, women's significantly shorter career trajectories are perhaps the most important cause of their lower incomes and slimmer chances of becoming a law firm partner. Future research must identify the causes of this significant career longevity gap between men and women in the Chinese legal profession.

The purpose of this paper is to investigate the perceived challenges that Chinese vocational college educators face in developing and delivering constructivist active and experiential entrepreneurship education.

Qualitative data were collected from 24 focus groups of educators who had been tasked with embedding constructivist entrepreneurship education into their teaching and curriculum, at four different vocational colleges situated in four different provinces in China. The data were coded and analysed for emerging themes using a process of bottom-up thematic analysis.

A range of concerns were identified from the focus groups and these could be divided into five main challenges, which were the role of the educator in the constructivist learning process and their ability to control the process; the educators perceived student reaction to the process and their engagement with it; the time and technology required to deliver the process; the link between the learning and industry; and the educators’ perception of the requirements to meet internal expectations.

This research explores the educators’ perceptions of the challenges they face in developing and delivering active and experiential constructivist entrepreneurship education. Whilst these concerns may impact how the educators’ approach the task, these concerns are only perceived, as the educators’ have not yet implemented the introduction of constructivist entrepreneurship education when other challenges may become evident.

Encouragement by the Chinese Government to develop and deliver constructivist active and experiential entrepreneurship education has resulted in a number of tensions and challenges. Entrepreneurship education in China is still relatively young and under researched and this research contributes to the literature by exploring the challenges that educators face in developing and delivering constructivist entrepreneurship education in Chinese vocational colleges.

In light of university business English pedagogical innovation, this study reports an empirical study with 66 English major participants.

The study uses online survey and participant observation to investigate their practice-oriented motivation and needs, the perceptions of using vocational education and training pedagogy in business English teaching and the learning outcomes in a Chinese university context.

The study found participants with motivations to learn business and trade knowledge, develop practice-oriented abilities and the preferences of learning flexibly and autonomously. For the perceptions of using vocational education and training pedagogy, simulations of meetings and negotiations were recommended and the job-based competency development model was useful. Workplace simulation was also particularly suggested to bridge the gap between classroom and workplace. For learning outcomes, writing practices and workplace simulation were considered particularly useful. The learning gains were found in international trade correspondence writing. While the intention of continuing learning business English correspondence writing was identified, more opportunities should be created for more practice-oriented activities, such as internship or corporate visit.

Informed by vocational education and training theory, the study has important pedagogical, theoretical and policy implications for business English teaching in both China and worldwide contexts.