Javascript is required
Search
Volume 3, Issue 4, 2025

Abstract

Full Text|PDF|XML
Sustainability requirements and industrial digitalization are reshaping warehouse design and operation, yet the choice between incremental efficiency measures and more advanced intelligent systems remains difficult. This study investigates how conventional, energy-efficient, smart automated, and net-zero warehouses differ in their requirements and transformation priorities. A comparative evaluation framework was developed from the literature and organized around four dimensions: economic feasibility, environmental performance, operational performance, and intelligent technological readiness. The four alternatives were qualitatively assessed in terms of investment, operating costs, energy efficiency, resource use, automation, digital integration, real-time data availability, and implementation complexity. The roles of automated storage and retrieval systems (AS/RS), autonomous mobile robots (AMRs), the Internet of Things (IoT), warehouse management systems (WMS), energy monitoring, and renewable energy technologies were also examined. An illustrative calculation was conducted under identical throughput conditions to compare energy intensity across the four alternatives. The comparison showed that the alternatives did not form a universal progression from an inferior system to a superior one. Energy-efficient warehouses offered a comparatively accessible route to lower energy use, whereas smart automated warehouses provided stronger digital integration and operational coordination but required greater technological and organizational capacity. Net-zero warehouses achieved the lowest illustrative energy intensity, although they involved the highest investment and infrastructure demands. The findings indicate that intelligent and sustainable warehouse transformation depends on the alignment of technology, operational needs, financial capacity, and environmental objectives. The proposed evaluation perspective provides a structured basis for assessing warehouse transformation pathways under different industrial and organizational conditions.

Abstract

Full Text|PDF|XML
Efficient inventory control in finite-capacity warehouses requires a quantitative understanding of the stochastic interactions between supply, demand, and storage limitations. An entropy-based stochastic decision-support framework was developed to characterize inventory dynamics and evaluate operational uncertainty under finite-capacity constraints. The warehouse was modeled as a finite-capacity birth-death process in which inventory replenishment and order fulfillment were governed by stochastic supply and demand rates, respectively, while the supply-to-demand ratio is defined as the warehouse utilization factor. The steady-state probability distribution of inventory levels was derived, and Shannon entropy was employed to quantify the uncertainty associated with warehouse occupancy. It was demonstrated that entropy reached its maximum when the warehouse utilization factor equaled unity, indicating that all inventory states become equally probable and that the inventory system operates under the greatest level of stochastic uncertainty. This critical operating point also represents the transition between demand-driven and supply-driven regimes. When the utilization factor was less than one, warehouse performance was primarily constrained by stockout risk, whereas values exceeding one led to increasing blocking probability caused by storage saturation. The trade-off between blocking probability and stockout probability was further investigated, revealing that their combined probability is minimized at the critical utilization condition. Consequently, the complementary probability of the warehouse operating in standard inventory states was maximized. In addition, the stochastic race condition between stockout and blocking events was analyzed to determine which operational constraint is expected to occur first under varying utilization levels. The proposed framework provides both theoretical insight and practical decision support for inventory planning, warehouse capacity management, and procurement policy optimization by establishing a direct relationship between stochastic inventory behavior, information entropy, and operational performance in finite-capacity warehouse systems.
Open Access
Research article
Data-Driven Route Choice Prediction for Expressway Operations Using Ensemble Learning: Sensitivity Analysis of Differentiated Toll Policies
Yuejiang Su ,
Liang Zhang ,
Minxian Yuan ,
Dexin Wu ,
weiwei qi ,
yunlong cao ,
Liuhua Zhang ,
Nanfeng Zhang
|
Available online: 11-30-2025

Abstract

Full Text|PDF|XML

Intelligent expressway management requires reliable prediction of travellers' route choices and quantitative assessment of their responses to operational interventions. This study investigates a data-driven route choice framework that links large-scale toll transaction data with ensemble learning to support differentiated tolling and route management. Actual vehicle routes were reconstructed from toll transaction records, electronic toll collection (ETC) gantry records, and expressway network topology, from which revealed-preference candidate route sets were derived. A total of 28 features were constructed to characterize route attributes, relative differences among candidate routes, choice-set composition, and trip attributes. A Light Gradient Boosting Machine (LightGBM) model was then developed using each “trip $\times$ candidate route” pair as the unit of observation, and its predictive performance was compared with random forest, Extreme Gradient Boosting (XGBoost), multinomial logit (MNL), nested logit, and binary logistic regression. The empirical analysis used 329,699 trips from the Guangdong expressway network, including 32,473 trips in the test set. The Light Gradient Boosting Machine (LightGBM) model achieved a route-level hit rate of 85.71%, exceeding the random-guessing benchmark by 43.81 percentage points and outperforming the three conventional discrete-choice and logistic models, while showing performance comparable to random forest and XGBoost. The sensitivity analysis further showed that toll responses varied substantially with a route’s competitive position, choice-set size, and vehicle type. Routes with baseline choice probabilities of 50%–80% were more responsive to toll changes than strongly dominant routes, while trucks showed greater toll sensitivity than cars. The results demonstrate that large-scale operational data and ensemble learning can provide a reproducible framework for route choice prediction and scenario-based evaluation of differentiated toll policies. The proposed framework supports data-driven decision-making for intelligent expressway operations and provides a practical basis for evaluating route-level traffic management strategies.

Abstract

Full Text|PDF|XML

The digital transformation of logistics is increasingly driven by interconnected technologies that support workforce coordination, data-driven decision-making, operational integration, and human-centered industrial management. However, logistics companies face difficulties in selecting digital technologies because their adoption involves simultaneous technological, organizational, economic, and employee-related considerations. This study develops an intelligent multi-criteria decision-support framework for evaluating and prioritizing digital technologies for workforce management in logistics companies. Five technology alternatives—artificial intelligence (AI)-based human resources (HR) systems, Internet of Things (IoT) and wearable technologies, enterprise resource planning (ERP)/HR information system (HRIS), digital learning and training, and digital workforce management—are assessed against eight criteria covering implementation complexity, employee productivity, employee satisfaction and retention, implementation and operating costs, scalability and flexibility, data security and privacy risks, legal and ethical risks, and integration capability. The criteria importance through intercriteria correlation (CRITIC) method is applied to derive objective criterion weights from the decision matrix, while interactive and multicriteria decision making (TODIM) is used to rank the alternatives by incorporating the asymmetric effects of gains and losses in the decision process. The results show that Digital Workforce Management achieves the highest overall dominance value (1.000), followed by Digital Learning and Training (0.967) and ERP/HRIS (0.921) systems, whereas AI-based HR systems and IoT and Wearable Technologies rank fourth and fifth, respectively. Robustness analysis using alternative weighting schemes and the technique for order preference by similarity to ideal solution (TOPSIS) and weighted aggregated sum product assessment (WASPAS) methods confirms a relatively stable separation between the three higher-ranked and two lower-ranked alternatives, although the relative positions of the leading technologies vary across methodological settings. The findings demonstrate that digital technology selection in logistics should be treated as an industrial intelligence problem in which operational integration, workforce performance, organizational adaptability, and human-centered risks are evaluated jointly. The proposed framework provides structured decision support for logistics organizations seeking to align digital workforce technologies with broader Industry 4.0 and Industry 5.0 transformation objectives.

Abstract

Full Text|PDF|XML

Automated unmanned aerial vehicle (UAV) docking systems play an important role in unattended industrial inspection and monitoring. However, coordinating mechanical movements, maintaining landing-platform stability, and securing aircraft during deployment and recovery remain challenging. This study investigates the mechanical design and coordinated motion control of a four-position UAV docking system. An integrated architecture comprising a sliding roof, a three-degree-of-freedom (3-DOF) landing platform, and a mechanical centering and locking mechanism was developed. The roof and centering drives were analysed through mechanical load calculations and parameter sensitivity analysis, while a supervisory control framework was formulated to coordinate actuator movements through position feedback and operating interlocks. A representative three-actuator model was also established to evaluate platform levelling under static inclination and periodic disturbances using proportional (P) and proportional-derivative (PD) control. The calculated roof resistance and driving torque were 250 N and 6.75 $\mathrm{N\cdot m}$, respectively, while the centering resistance was 325 N and the estimated motor torque was 4.51 $\mathrm{N\cdot m}$ under an assumed unit transmission ratio. In the simplified numerical model, P and PD control achieved static settling times of 1.02 s and 1.21 s, respectively. Under periodic disturbances, the combined root-mean-square (RMS) attitude error decreased from 2.599$^\circ$ without compensation to 1.299$^\circ$ with P control and 1.185$^\circ$ with PD control. The results indicate that coordinated mechanical operation and feedback-based platform levelling can be integrated within a common docking framework. The study provides a basis for the development of unattended industrial UAV docking systems, although the predicted control performance requires validation using the actual platform geometry and actuator characteristics.

- no more data -