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The purpose of this paper is to propose a new tool for stock investment risk management through studying stocks with what kind of characteristics can be predicted by individual investor behavior.

Based on comment data of individual stock from the Snowball, a thermal optimal path method is employed to analyze the lead–lag relationship between investor attention (IA) and the stock price. And machine learning algorithms, including SVM and BP neural network, are used to predict the prices of certain kind of stock.

It turns out that the lead–lag relationships between IA and the stock price change dynamically. Forecasting based on investor behavior is more accurate only when the IA of the stock is stably leading its price change most of the time.

One limitation of this paper is that it studies China’s stock market only; however, different conclusions could be drawn for other financial markets or mature stock markets.

As for the implications, the new tool could improve the prediction accuracy of the model, thus have practical significance for stock selection and dynamic portfolio management.

This paper is one of the first few research works that introduce individual investor data into portfolio risk management. The new tool put forward in this study can capture the dynamic interplay between IA and stock price change, which help investors identify and control the risk of their portfolios.

The purpose of this paper is to study the effect of chromium content on the microstructure and corrosion resistance of Ni-Cr coating.

Ni-Cr coating was prepared by pulse current electrodeposition with trivalent chromium. On the basis of studying effect of electroplating parameters on composition and morphology, Ni-Cr alloy coatings with various chromium contents were obtained. The microstructure was characterized by scanning electron microscopy, X-ray diffractometer and transmission electron microscopy. Corrosion behavior was studied by potentiodynamic polarization and electrochemical impedance spectroscopy techniques.

Electrodeposited chromium was solidly dissolved in nickel and refined the grain of the coating. With the increase of Cr content, the corrosion resistance of Ni-Cr coating was enhanced, which is due to the formation of continuous nickel hydroxide and compact chromium oxide passive films.

Ni-Cr alloy coating without penetration crack was prepared in trivalent chromium electrolyte, and the mechanism of its excellent corrosion resistance was proposed.

This paper aims to analyse the reform syndrome, bottle‐neck effects and their impacts on teachers and school education in the last ten years and highlight the direction of new developments.

The paper examines educational reforms in Hong Kong in the last decade.

Echoing the international trends of educational reforms, Hong Kong, as an international city, has initiated a series of educational reforms in the past decades. The experiences of educational reforms in Hong Kong may provide a good case for understanding the dynamics of educational reforms and drawing theoretical and practical implications for research, policy formulation and implementation not only in Hong Kong but also in other international communities.

From the analysis of the reform syndrome, particularly the bottle‐neck effect, there should be seven key aspects for policy‐makers, educators and stakeholders in Hong Kong to address the emergent key issues in educational reforms and work for the further development of their education system in the coming few years.

This study aims to extract knowledge of ancient Chinese scientific and technological documents bibliographic summaries (STDBS) and provide the knowledge graph (KG) comprehensively and systematically. By presenting the relationship among content, discipline, and author, this study focuses on providing services for knowledge discovery of ancient Chinese scientific and technological documents.

This study compiles ancient Chinese STDBS and designs a knowledge mining and graph visualization framework. The authors define the summaries' entities, attributes, and relationships for knowledge representation, use deep learning techniques such as BERT-BiLSTM-CRF models and rules for knowledge extraction, unify the representation of entities for knowledge fusion, and use Neo4j and other visualization techniques for KG construction and application. This study presents the generation, distribution, and evolution of ancient Chinese agricultural scientific and technological knowledge in visualization graphs.

The knowledge mining and graph visualization framework is feasible and effective. The BERT-BiLSTM-CRF model has domain adaptability and accuracy. The knowledge generation of ancient Chinese agricultural scientific and technological documents has distinctive time features. The knowledge distribution is uneven and concentrated, mainly concentrated on C1-Planting and cultivation, C2-Silkworm, and C3-Mulberry and water conservancy. The knowledge evolution is apparent, and differentiation and integration coexist.

This study is the first to visually present the knowledge connotation and association of ancient Chinese STDBS. It solves the problems of the lack of in-depth knowledge mining and connotation visualization of ancient Chinese STDBS.

The purpose of this paper is to reveal the characteristics of the temperature field under different types of heat sources, which are significant to the temperature control encountered in practical manufacturing processes.

The temperature fields in an infinite slab under line or plane heat source are calculated numerically by control volume approach and ADI scheme, and the numerical results of the temperature rise have been compared among the different types of the heat sources.

The numerical results show the different changing patterns of temperature fields under line and plane heat source, respectively, and demonstrate that the magnitude of temperature rise depends strongly on the type of the heat sources. The order of temperature rise from high to low is point, line and plane heat source base on the same input heat.

The study is original and findings are new, which demonstrate the different changing patterns of temperature fields and the magnitude of temperature rise under line and plane heat source. The numerical solution is significant for the temperature control in practical manufacturing processes.

The purpose of this paper is to discover and better understand the efficiency of university mergers from the perspective of knowledge production, with the research capability as the point of contact.

In total, 20 colleges and universities directly under the central ministries that merged in 2000 were taken as the research samples. Factor analysis methods are adopted to calculate the public factor scores, which were taken as the basis of the time series analysis and similar comparative analysis.

The results indicated that, by the end of 2005, the reform of universities merger has a positive impact on the universities' knowledge production, but there was a “short‐term prosperity” after the merger happened, especially in the aspect of scientific research funding efficiency and the transformation of knowledge production outcomes.

Few if any mergers are painless and in the literature on mergers it is generally agreed that it can take up to ten years for the wounds to heal and for the new institution forged from previously autonomous identities to operate as a cohesive and well integrated whole.

To cope with the challenges of the twenty‐first century, the Hong Kong SAR government initiated the Curriculum Reform in 2001. In 2006, a research team from a tertiary institution was commissioned to review the progress of change for smooth implementation of the reform in its next phase. This paper aims to examine this issue.

The nature of the review is basically a survey, applying questionnaires and follow‐up focus‐group interviews to collect data from different groups of subjects. The sample was around 20 per cent of the population, i.e. a total of 252 primary (n=138) and secondary (n=114) schools.

The paper reports findings on the support for the Reform by primary and secondary schools. Five areas of agreement among school heads are examined, which include challenges to be met, guiding principles of the reform, learning goals, reform framework and the overall agreement with the rationale of the reform. It is found that, while the curriculum reform was supported among school heads, senior teachers and teachers, there was a gap between the views of senior management team and frontier teachers.

This is a very comprehensive research project with a limited timeframe. The paper can only report and discuss findings mainly on the support for curriculum reform by school heads. Other aspects of the study will be discussed and reported separately in subsequent papers.

The gap between the views of senior management team and frontier teachers is worth probing as this is the most obstructive factor to the implementation of the reform. Identifying the cause would be the first step in formulating strategies to address and, hopefully, to facilitate the smooth transition from the phase of implementation to the continuation phase of the change process.

The study has suggested the development of a two‐dimensional framework of agreement areas and stakeholders which will contribute to a better understanding of the change process in general, and achievements of a curriculum reform in particular. Other issues are also discussed.

The purpose of this paper is to explore how curved road and lane-changing rates affect the stability of traffic flow.

An extended two-lane lattice hydrodynamic model on a curved road accounting for the empirical lane-changing rate is presented. The linear analysis of the new model is discussed, the stability condition and the neutral stability condition are obtained. Also, the mKdV equation and its solution are proposed through nonlinear analysis, which discusses the stability of the extended model in the unstable region. Furthermore, the results of theoretical analysis are verified by numerical simulation.

The empirical lane-changing rate on a curved road is an important factor, which can alleviate traffic congestion.

This paper does not take into account the factors such as slope, the drivers’ characters and so on in the actual traffic, which will have more or less influence on the stability of traffic flow, so there is still a certain gap with the real traffic environment.

The curved road and empirical lane-changing rate are researched simultaneously in a two-lane lattice hydrodynamic models in this paper. The improved model can better reflect the actual traffic, which can also provide a theoretical reference for the actual traffic governance.

The purpose of this paper is to provide an understanding of principal preparation and training in China by providing a background discussion of principal preparation in a number of countries. As an illustration, it provides an overview of the curriculum used in the initial preparation of school principals at Beijing Normal University.

The paper draws mainly on writing and research from China, Australia and the USA to explore principal preparation and training in China.

In addition to providing a rich description of principal preparation in China, the paper's main findings comprise seven key challenges that confront China as it endeavours to provide quality principal preparation. These challenges include China's diversity and uneven social, cultural and educational development; limited resources in some regions throughout China; the place and importance of study tours for principal preparation; the teaching approach used to train principals; the process used for assessing principal learning during their training programs; the limited transfer of learning from the classroom to the school environment; and the timing of training for principals.

Each of the challenges arising here raises important practical implications for developers of principal training programs.

The paper paints a picture of principal preparation in China and raises a number of issues and challenges with which it continues to grapple. Of note is that China is not alone in facing some of these ongoing concerns.

Under the new policy framework, the China Government will substantially increase education resources investment. As a result, financial under‐provision of schools will not be the main problem in the near future. However, school efficiency will emerge as the new factor in attracting the attention of the government and the public in China, which is also one of the important fields of Education Economics research.

The authors use Data Envelopment Analysis (DEA) to evaluate a sample of 58 primary schools in six districts in Beijing, hoping to find the solutions to school efficiency improvement as a result of under‐adequate investment.

In the years to come, the central government of China will continue to enhance transferring payment from the exchequer. The education input will be assured accordingly. However, if schools run under low efficiency, the education resources will not be well used and sustainability of elementary education will not be assured.

In light of the research purpose and the limited data, there has been no in‐depth discussion of the impact of, for example, families' social status, district development disparity, social cultural influence and history context. Obviously, considering more factors which may affect school efficiency will help to find the best solution for the public education sector of government.