Search results

This study aims to identify Chinese municipal agencies’ and cadres’ drivers to implement government websites’ accessibility upgrades, and to explain how these drivers are interrelated to shape the implementation outcome.

The authors conducted a single case study using qualitative interviews, online follow-up conversations, fieldwork observations and policy documents in the capital municipality MD of J Province, East China. The authors analyzed the case from the theoretical perspectives of institutional pressures, organizational capacity and individual intentions.

Coercive pressure through policy mandate and benchmark incentivized the responsible agency and cadres in MD to initiate the implementation of the accessibility upgrades and “meet the set targets.” The responsible agency’s enhanced organizational capacity and local cadres’ engagement allowed them to “outperform” as their eventual way of achieving the mandate requirements. The implementation outcome resulted from the interplay of all levels of incentives. Coercive pressure predominantly drove the launch of the upgrade project, meanwhile significantly influencing the organizational- and individual-level incentives that additionally explained the outperformance.

This study provides a nuanced, in-depth understanding of how sedimented factors and especially their interrelationships drive the implementation of e-government initiatives and shape the implementation outcome in Chinese municipal agencies.

The accurate prediction of driving torque demand is essential for the development of motion controllers for mobile robots on complex terrains. This paper aims to propose a hybrid model of torque prediction, adaptive EC-GPR, for mobile robots to address the problem of estimating the required driving torque with unknown terrain disturbances.

An error compensation (EC) framework is used, and the preliminary prediction driving torque value is achieved using Gaussian process regression (GPR). The error is predicted using a continuous hidden Markov model to generate compensation for the prediction residual caused by terrain disturbances and uncertainties. As the final step, a gain coefficient is used to adaptively tune the significance of the compensation term through parameter resetting. The proposed model is verified on a sample set, including the driving torque of a mobile robot on three different sandy terrains with two driving modes.

The results show that the adaptive EC-GPR yields the highest prediction accuracy when compared with existing methods.

It is demonstrated that the proposed model can predict the driving torque accurately for mobile robots in an unconstructed environment without terrain identification.

This study aims to investigate the mechanical and tribological behavior of 70Mn steel with different laser re-melted textured patterns.

Laser surface re-melting (LSR) was used to manufacture various textured patterns (i.e. line, grid and mixed) on both the original and heat-treated 70Mn steel plates. The micro-hardness, microstructure, tensile strength, yield strength, elongation, coefficients of friction (COF) and worn morphologies were characterized to evaluate the impact of different textured patterns on the overall performance.

The results show that re-melted unit exhibited the highest surface hardness on the subsurface. The increase in surface hardness of the re-melted unit for the heat-treated 70Mn steel samples was much lower than that of the original ones. The re-melted textured patterns did not improve the tensile strength, yield strength and elongation of either original or heat-treated 70Mn steel samples. The re-melted textured patterns effectively reduced the average COFs of heat-treated 70Mn steel samples, but increased friction of the non-heat-treated samples.

This study provides valuable insights into enhancing the mechanical properties and tribological characteristics of 70Mn steel, particularly in the automotive, heavy machinery and high-load application sectors. These industries have stringent requirements for durability and friction control, and the findings of this research are expected to effectively extend the lifespan of mechanical components.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-11-2024-0443/