Search results

Currently, ubiquitous smartphones embedded with various sensors provide a convenient way to collect raw sequence data. These data bridges the gap between human activity and multiple sensors. Human activity recognition has been widely used in quite a lot of aspects in our daily life, such as medical security, personal safety, living assistance and so on.

To provide an overview, the authors survey and summarize some important technologies and involved key issues of human activity recognition, including activity categorization, feature engineering as well as typical algorithms presented in recent years. In this paper, the authors first introduce the character of embedded sensors and dsiscuss their features, as well as survey some data labeling strategies to get ground truth label. Then, following the process of human activity recognition, the authors discuss the methods and techniques of raw data preprocessing and feature extraction, and summarize some popular algorithms used in model training and activity recognizing. Third, they introduce some interesting application scenarios of human activity recognition and provide some available data sets as ground truth data to validate proposed algorithms.

The authors summarize their viewpoints on human activity recognition, discuss the main challenges and point out some potential research directions.

It is hoped that this work will serve as the steppingstone for those interested in advancing human activity recognition.

This paper aims to comment upon the governance systems of state‐owned enterprises in Shanghai and to consider the adequacy or otherwise of those governance structures.

The paper presents a study of existing governance arrangements and structures and considers areas for possible reform.

A sound corporate governance system is of great significance not only to the healthy development of enterprises but also for the enterprises to survive when they face the economic crisis. With the continuous spread of the world economic crisis, how to improve the corporate governance of state‐owned enterprises in Shanghai so that they can pass the financial crisis period safely has become one urgent and critical issue.

The study presents detail and reform areas for further reflection.

The kindergarten curriculum in mainland China has evolved through four periods and the current reform began in the end of 1980s. The reform aimed to transform kindergarten practice by shaping ideologies including respect for individual child, active learning, and play-based integrated curriculum. This review of research literatures shows that compared with the practice before the reform, many kindergarten teachers organize classrooms in learning centers, provide more play materials, pay time, and freedom for free play, and pay more attention to individuals. But indoor space organized in rice-seedling-bed model, teacher-led group instruction and teacher-controlled interactions are still often observed after three decades of reform efforts; there still exist great variations among kindergartens of different sponsoring bodies and in different regions. The problems resulted from the innate deficiencies of the top-down and value-priority reform, the conflicts between the advocated value and the traditional Chinese culture with emphasis on Ming-Fen, testing, and the value of children for the whole family and nation, and the unequal distribution of public resources decided by the educational institutions. Therefore, the curriculum reform is not a separate endeavor from other social changes, but a comprehensive and systematic change. To guarantee the success of the curriculum reform, the Chinese society needs cultural transformation and institutional reconstruction.

Technological entrepreneurship concerns the transformation of potentially viable technological opportunities into successful businesses. Absorptive capacity is argued to be essential for this transformation, since it can facilitate the prediction of new technology trends and the assimilation and application of new knowledge to produce new commercial outputs. The investigation of the relationships between absorptive capacity, technological entrepreneurship and their impact on Guangdong technology firms' performance is the purpose of this study.

In this aim a positive causal chain from absorptive capacity to technological entrepreneurship and from this latter to performance is tested through a mediation analysis, which uses an ordinary least squares regression‐based path analytical framework for estimating indirect effects on a sample of 113 Guangdong technology‐based firms.

Findings are consistent with the hypothesis that greater absorptive capacity leads to greater technological entrepreneurship, which in turn leads to greater performance. Therefore evidence is provided about both the mediating role of technological entrepreneurship and the role of absorptive capacity as its antecedent in relation to Guangdong‐based technology firms' performance.

A relevant but somewhat neglected relationship is examined using an integrative model in the Guangdong context. Moreover the study uses direct measures of absorptive capacity as a capability and provides a firm‐level operationalization of technological entrepreneurship. In so doing it also adopts state‐of‐the‐art analysis techniques and highlights the relevance of investments in soft factors for Guangdong technology firms' path towards excellence.

The purpose of this paper is to examine the great contributions made by the American library expert, Mary Elizabeth Wood, to Chinese library development.

As a pioneer of the modern library movement Mary Elizabeth Wood devoted herself to a Chinese library career. It was structured according to the following theme: setting up the Boone Library and introducing the modern American public library into China; establishing Boone Library School and initiating Chinese library science education; raising money and appealing for China's library development; helping forward the foundation of the Library Association of China; as well as promoting Chinese library intercommunion and cooperation with the West.

With the background of underdeveloped Chinese librarianship, Mary Elizabeth Wood introduced modern American public library spirit into China, opened the gate of Chinese library science, and promoted Chinese library science.

The paper discusses the library history of China and the role of an American librarian in Chinese library history; thus, it should be of wide interest to researchers involved in library history.

Mary Elizabeth Wood devoted herself to a Chinese library career, and promoted Chinese library science greatly, but research on her is limited. This paper considers her contribution to Chinese library science.

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.

High power and speed are new demands for rotating machinery which needs the journal bearings with high dynamic characteristics. The critical speed of the rotor-bearing system is one of the most significant parameters to evaluate the dynamic characteristics. This paper aims to investigate the theoretical and experimental analysis of a rotor system supported by large diameter elliptical bearings.

To obtain the theoretical and experimental support for rotor-bearing system design, dynamic characteristics theoretical analysis based on the finite difference method is given and an experiment focuses on critical speed identification is carried out.

The theoretical calculation results indicate that the critical speed is near to 800 rpm and there is no large vibration amplitude round working speed (1,500 rpm). Using the test bench in the factory unit, vibration data including three experimental processes are obtained. According to the vibration data, the critical speed is identified which also indicates that it is stable when working at 1,500 rpm.

The design method for the rotor system supported by large diameter elliptical bearing can be obtained by the theoretical and experimental results shown in this paper.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2020-0122/

The authors explored the effect of college student leader experience on students' employment prospects, such as their starting salary. The authors also examined the factors behind being a student leader and the set of skills that foster the effect of leadership experience.

Using an empirical panel survey, the authors collected data from 3,361 undergraduate students over five consecutive years in China, which were analysed using different econometric methods.

The starting salary premium associated with student leaders' experiences was approximately 7%. Individual learning, problem-solving, and interpersonal skills were mediating variables that replaced half of the wage premium effect of the student leader. Family background and types of educational experiences were associated with being a student leader and labour market outcomes.

The authors only explored a few leadership-related employability skills; other relevant skills require consideration.

This study informs students, parents, and higher education institutions (HEIs) by clarifying the importance of leadership development. An effective transition from higher education to the labour market should be emphasised.

Higher education educators should provide guidance to student organisations and promote formal and informal student leadership education to all students.

The authors revealed some factors that promote student leadership and how they are associated with labour market outcomes in China. The authors also verified and validated the capital improvement channel for some specific leadership-related skills to explain the effect of student leader experience on employment outcomes.

This paper aims to improve the recommendations performance for cold-start users and controversial items. Collaborative filtering (CF) generates recommendations on the basis of similarity between users. It uses the opinions of similar users to generate the recommendation for an active user. As a similarity model or a neighbor selection function is the key element for effectiveness of CF, many variations of CF are proposed. However, these methods are not very effective, especially for users who provide few ratings (i.e. cold-start users).

A new user similarity model is proposed that focuses on improving recommendations performance for cold-start users and controversial items. To show the validity of the authors’ similarity model, they conducted some experiments and showed the effectiveness of this model in calculating similarity values between users even when only few ratings are available. In addition, the authors applied their user similarity model to a recommender system and analyzed its results.

Experiments on two real-world data sets are implemented and compared with some other CF techniques. The results show that the authors’ approach outperforms previous CF techniques in coverage metric while preserves accuracy for cold-start users and controversial items.

In the proposed approach, the conditions in which CF is unable to generate accurate recommendations are addressed. These conditions affect CF performance adversely, especially in the cold-start users’ condition. The authors show that their similarity model overcomes CF weaknesses effectively and improve its performance even in the cold users’ condition.