Search results

This paper mainly studies to build control charts under different alarm rule. For different alarm rule, the control limit parameters of a control chart should be changed, then some kinds of control schemes under different alarm rule were compared and the methods of calculating ARL for different control schemes wee given.

This paper aims to investigate the relationship between external regulation pressure and corporate social responsibility (CSR) reporting decision and comprehensiveness and the relationship between block ownership and CSR in China.

This paper provides descriptive statistics of the current state of CSR reporting in China. In addition, regression models are utilized to analyze the behavior of CSR reporting of a sample of 5,334 listed firms in China.

Our paper records a significant increase of CSR reporting in the period of 2008-2010. Using a sample of 5,334 listed firms in China, we find a positive yet weak association between centrally controlled state-owned enterprises (SOEs) and CSR reports. Moreover, we find that firms with more concentrated block ownership are less likely to issue CSR reports.

Taken as a whole, our analyses suggest that the entrenchment effect from blockholders seems to dominate the incentive effect and this depresses the quality of CSR reports.

Despite the well-known effect of economic factors on CSR decision, corporate governance such as ownership structure could complicate the final results. Furthermore, the institutional background of the country and its implications for corporate governance should be considered jointly and concurrently.

The positive effect from regulatory pressure on centrally owned SOEs suggests that regulation remains an effective tool to encourage CSR reporting in emerging markets.

First, our study confirms prior research that CSR disclosure decision is primarily driven by economic and strategic considerations. Moreover, our results suggest that a country’s institutional background, in addition to economic and strategic considerations, influences the decision and quality of CSR disclosures. Second, we extend the literature on ownership structure, particularly with respect to blockholders. Third, our research design addresses a weakness in earlier studies which are biased exclusively on state ownership to the exclusion of all other blockholders.

The ancient town of Lijiang is a representative place of ethnic minorities in China’s southwest border area jointly built by many ethnic groups. Its rich and diversified history, culture and architecture as well as its artistic and spiritual values need to be better retained and explored.

The protection and inheritance of Lijiang’s cultural heritage will be improved through the construction of digital memory resources. To guide Lijiang’s digital memory construction, this study explores strategies of digital memory construction by analyzing four case studies of well-known memory projects from China and America.

From the case studies analysis, factors of digital memory construction were identified and compared. Factors led to the discussion of strategies for constructing the digital memory of Lijiang within its design, construction and service phases.

The ancient town of Lijiang is a famous historical and cultural city in China, and it is also a representative place of ethnic minorities in the border area jointly built by many ethnic groups. The rich culture should be preserved and digitalized to offer better use for the whole nation.

Exponentially weighted moving average (EWMA) control chart can be designed to quickly detect small shifts in the mean of a sequence of independent normal observations. But this chart cannot perform well for skewed distribution. The main goal of this article is to suggest an EWMA control chart method that can be used to monitoring small shifts in a skewed distribution. Weighted variance method is introduced to construct a kind of EWMA chart for skewed distribution and the optimization design of this chart is given by using average run length as a performance assessment criteria. Pair of asymmetry control limits could be evaluated by sample dates in skewed distribution. The advantage of this method in detecting little drift for skewed distribution was illustrated by comparing with others control charts.

This paper aim to take the ship shaft stern bearing as the research object, and studies the influence of journal axial vibration on bearing dynamic characteristics under different misaligned angles and rotation speeds.

Computational fluid dynamics (CFD) and harmonic excitation method were used to build bearing unstable lubrication model, and the dynamic mesh technology was used in calculation.

The results indicate that journal axial vibration has a significant effect on bearing dynamic characteristics, like maximum oil film pressure, bearing stiffness and damping coefficients, and the effect is positively correlated with journal misaligned angle. The effect of shaft rotation speed and journal axial vibration on bearing dynamics characteristics are independent; they have no coupling. Bearing axial stiffness is mainly affected by the journal axial displacement, bearing axial damping is mainly affected by journal axial velocity and they are positively correlated with the misaligned angle. The influence of rotational speed on bearing axial stiffness and axial damping is not obvious.

This paper establishes the bearing dynamic model by CFD and harmonic excitation method with consideration of cavitation effect and analyzing the influence of journal axial vibration on the dynamic characteristics. The results are benefit to the design of ship propulsion shaft and the selection of stern bearing. Also, they are of great significance to improve the operation stability of the shaft bearing system and the vitality of the ship.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-11-2022-0337/