International Journal of Applied Science

Optimizing Logcumsumexp on Cambricon MLU: Architecture-Aware Scheduling and Memory Management

Xiaohu Xu, Yusen Zhu — Thu, 03 Jul 2025 00:00:00 +0800

The Logcumsumexp algorithm is a core method for numerically stable cumulative summation in logarithmic space, especially suitable for scenarios involving extremely small or large numerical computations. By applying logarithmic transformation, this algorithm effectively addresses the common issues of underflow and overflow in probability calculations, deep learning, and statistical modeling, making it an important high-performance computing algorithm. In recent years, China's chip industry has been continuously rising, and the domestic MLU computing platform from Cambricon Technologies has provided new options for global users. Based on the Cambricon MLU computing platform and in combination with its hardware structure, this paper constructs a set of Logcumsumexp algorithm named MLULCSE, which can perform Logcumsumexp operations on tensors of any dimension along the specified dimension and has been optimized for different types of Logcumsumexp tasks. By categorizing tasks into four types and implementing different strategies tailored to the hardware architecture, we achieved efficient logcumsumexp computation. This work enables efficient probabilistic computing on domestic AI accelerators, experimental results show that MLULCSE running on MLU 370-X4 has a hardware time that is controlled within 7 times compared to Pytorch Logcumsumexp running on Tesla V100, and in some cases, it even reaches 0.42 times.

Analysis of Dalian's Railway Freight Market and Strategies for the Development of Multimodal Transportation

Liu Danqi — Wed, 16 Jul 2025 00:00:00 +0800

From 2020 to 2023, the growth rate of railway freight volume in Dalian was 12.3%. In order to implement the national dual-carbon strategy, this study will closely integrate with the actual situation in Dalian and innovatively adopt quantitative indicators such as freight volume and railway freight volume to analyze the railway freight market in Dalian. It focuses on the key factors that restrict the development of railway freight transportation and multimodal transport in Dalian, proposes strategies such as adopting multimodal transport to enhance the comprehensive benefits of logistics and transportation, promotes industrial agglomeration and regional development, provides support for Dalian's ecological priority and green development.

Research on Ethical Risks of Digital Technology and Mitigation Strategies on Smart Construction Sites

Jiajun Wu, Menghui Wang, Ya Hu, Zixin Lin, Xin Zhang, Jialu Yao — Sun, 20 Jul 2025 00:00:00 +0800

With the widespread application of digital technologies on smart construction sites, ethical risks have become increasingly prominent, potentially provoking strong negative public sentiment and impeding the project process. This study investigates the ethical risks associated with digital technologies on smart construction sites and examines the mechanisms shaping public perceptions of these risks. Employing clear set qualitative comparative analysis (csQCA) and analyzing 30 actual cases, the study identifies key combinations of conditions that trigger public perceptions of ethical risk. The results show that high ethical risks on smart construction sites are not attributed to any single condition in a linear fashion, but rather emerge through three distinct pathways. Based on these findings, we recommend that, in promoting the development of smart construction site technologies, stakeholders should enhance technological supervision, strengthen data protection, and improve communication and coordination among all parties in the construction industry. Additionally, it is necessary to establish an ethical governance framework that incorporates the principles of the United Nations Sustainable Development Goals, emphasizing dynamic governance and worker participation. This study provides both a theoretical foundation and practical guidance for balancing technological innovation with ethical risk prevention on smart construction site practices.

New Energy Wind Turbine Fire Causes and Fire Fighting Strategies--In-depth Analysis and Response Plan

Liu Yi — Wed, 23 Jul 2025 00:00:00 +0800

As a core new energy technology, wind power plays a key role in the global energy transition. However, wind turbines, especially large-scale and complex new energy turbines with harsh operating environments and compact structures, are increasingly exposed to fire risk, which has become a serious threat limiting industrial safety and sustainable development. Wind turbine fires not only cause huge asset losses and affect the stable supply of electricity, but also may lead to serious environmental and ecological impacts and even personal injuries. Accurately identifying the root causes of wind turbine fires and formulating a scientific, effective fire fighting strategy based on them, adapted to the characteristics of new energy scenarios, is a major issue that needs to be broken through in the field of engineering and technology at present. This paper analyzes the complex mechanism of fire formation, evaluates the limitations and potential risks of the existing fire protection measures, and explores the innovative path of prevention and control, which is of urgent and far-reaching practical significance to ensure the healthy and steady development of the wind power industry.