Utilitas Algorithmica (UA)
ISSN: xxxx-xxxx (print)
Utilitas Algorithmica (UA) is a premier, open-access international journal dedicated to advancing algorithmic research and its applications. Launched to drive innovation in computer science, UA publishes high-impact theoretical and experimental papers addressing real-world computational challenges. The journal underscores the vital role of efficient algorithm design in navigating the growing complexity of modern applications. Spanning domains such as parallel computing, computational geometry, artificial intelligence, and data structures, UA is a leading venue for groundbreaking algorithmic studies.
- Research article
- https://doi.org/10.61091/jcmcc127a-447
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127a
- Pages: 8119-8131
- Published Online: 15/04/2025
Big data is an important foundation in social economy, science and technology, life and other fields, which also becomes a strategic emerging industry and has a crucial impact on the development of enterprises. As a new business model, its development is greatly limited due to the huge amount of data and difficult management. At present, there are many problems in power trading enterprises, such as backward management and low efficiency. The development of big data and blockchain technology would provide new management models for power trading enterprises and eliminate data inconsistency. It can improve data quality and help improve work efficiency, so as to reduce operating costs. Therefore, this paper introduced big data and blockchain based on fuzzy algorithm into the research of digital transformation of enterprise management. Blockchain technology provided technical support for enterprise data management. By starting from the concept of big data and blockchain, this paper would study and analyze how to promote the digital transformation of enterprise management. The research results showed that big data and blockchain based on fuzzy algorithm could promote the digital transformation of power enterprise management and improve the digital transformation process of power enterprises. This was about 11% higher than the digitalization process of traditional enterprises, and the satisfaction score was about 14.7% higher. Through data governance, the speed of digital transformation of power enterprise management was improved.
- Research article
- https://doi.org/10.61091/jcmcc127a-446
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127a
- Pages: 8105-8117
- Published Online: 15/04/2025
With the rapid expansion of high-speed railway network, the real-time monitoring of trackside equipment becomes particularly important. To detect trackside equipment information more accurately, a YOLO-R algorithm grounded on the improved You Only Look Once v3 (YOLOv3) algorithm is proposed, and the trackside equipment identification and detection model is constructed. By introducing feature pyramid network and adaptive Bessel curve network, the new model can effectively identify and locate different types of trackside equipment such as switch machine, derailer, and shaft counter. The experiment findings denote that the new model is superior to the existing technology in all aspects of on-orbit equipment recognition and detection, the computer resource occupancy rate is only 22%, the image recognition accuracy rate is more than 98%, and the processing speed is up to 200 images/second. This research not only raises the automation level of trackside equipment monitoring, but also provides a powerful technology for railway safety operation.
- Research article
- https://doi.org/10.61091/jcmcc127a-445
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127a
- Pages: 8093-8103
- Published Online: 15/04/2025
Generative artificial intelligence represented by ChatGPT has attracted wide attention in the field of education because of its powerful generative ability, both personalized learning, understanding the learner’s motivation, and providing personalized tutoring and feedback for education. With the advent of the Education 2.0 era, smart classroom has become a strategic choice for the construction of education modernization, and is widely used in higher education and vocational education. Generative AI enlightens students’ engineering thinking, computational thinking, design thinking and systems thinking, which not only helps students to master their professional courses, understand what they have learned, and improve their academic performance, but also assists teachers in updating their course content, keeping abreast of students’ learning trends, improving their teaching efficiency, and simplifying their work. However, generative AI is faced with expertise gaps and uncertainty about the existence of generated content in its application, as well as ethical issues, and this study proposes that the needs and values of education should be respected, with the aim of efficient and convenient services, and that data-driven and ethical ethics should be emphasized in future development. Smart classroom and enlightened thinking with the application of generative AI is a new way of thinking about educational change, which can help teachers and students to effectively carry out multiple interactions, enable teachers to better understand students, play the role of human beings in education, and truly allow technology to be used for teaching and promote classroom teaching reform.
- Research article
- https://doi.org/10.61091/jcmcc127a-444
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127a
- Pages: 8075-8092
- Published Online: 15/04/2025
Ultra-low energy buildings for building energy efficiency development, compared with traditional buildings have obvious advantages. This paper simulates ultra-low-energy residential buildings in severely cold regions through Software PHES, and calculates the energy-saving results of ultra-lowenergy residential buildings. The carbon emission factor method is analyzed, and the carbon emission factor is calculated at different stages in the life cycle of the building. Select ultra-low-energy residential buildings in cold regions for modeling, input meteorological parameters, indoor environmental parameters and internal disturbance settings, building envelope, and combine with heat recovery system to simulate the operation of ultra-low-energy residential buildings in cold regions. Analyze the indoor and outdoor temperature and humidity values of traditional houses and compare them with those of ultra-low-energy-consumption houses to verify the advantages of ultralow-energy-consumption residential buildings. Calculate the energy-saving efficiency of ultra-lowenergy residential buildings. Using the 9# residential building of Ruihu·Yunshanfu in Datong as a practical verification case, this ultra-low energy residential building has a total life-cycle carbon emission of 171.078 tCO₂/a, with a unit area carbon emission of 16.415 kgCO₂/m²·a. Compared to the energy-saving design standards implemented in 2016, the carbon emission intensity is reduced by 60.02%, fully confirming the carbon reduction benefits of ultra-low energy residential buildings in severe cold regions.
- Research article
- https://doi.org/10.61091/jcmcc127a-443
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127a
- Pages: 8061-8074
- Published Online: 15/04/2025
In recent years, the development of study activities is in full swing. In order to study the eco-education effect in national park study activities, this paper introduces Bayesian network and constructs an ecoeducation effect assessment model based on Bayesian inference. In the comparison of the absolute error of the assessment value with other assessment models, the assessment accuracy of the Bayesian inference assessment model in this paper is obtained. After constructing the ecological education effect assessment index system and completing the assignment, the level of ecological education that should be achieved in the national park study activities is obtained through Bayesian inference diagnosis. Finally, according to the results of education effect assessment, the probability of each indicator being in various states is obtained by simulation using Monte Carlo method. The mean absolute error of the Bayesian assessment model is 0.26 points, which is smaller than other comparative assessment models and has the highest assessment accuracy. The model’s ecosystem principles, anthropogenic intervention impacts, ecological disasters and ecological protection measures should be guaranteed to reach 75.6, 64.8, 67.9 and 69.4. The ecological operation rules (59.4→79.8), climate change (50.6→70.2), biodiversity reduction (52.2→69.8), and pollution prevention and control (56.4→78.3) have the highest accuracy for the ecosystem principle, anthropogenic intervention impacts, ecological disasters and ecological protection measures, respectively. , anthropogenic intervention effects, ecological disasters and ecological conservation measures, and ecological education effects had the greatest impact. The overall score of ecological education effect was 84.1, and the scores of ecosystem principle, human intervention impact, ecological disaster and ecological protection measures were 83.8, 85.2, 83.0 and 84.2.
- Research article
- https://doi.org/10.61091/jcmcc127a-442
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127a
- Pages: 8047-8060
- Published Online: 15/04/2025
For enterprises, development is ultimately reflected in the task completion performance of employees, and in order for employees to create higher task performance, it is necessary to consider not only their education and knowledge level, but also their emotional management ability. This study first collects data related to employees’ emotion management ability and task completion efficiency improvement through questionnaires, and then analyzes the statistical data by using the potential impact identification model designed based on Bayesian neural network model to obtain the potential impact probability of each dimension of emotion management ability on task completion efficiency improvement. The analysis of the forward and reverse inference probabilities of the Bayesian network model indicated that the most important potential influence factor leading to the improvement of task completion efficiency was the emotion expression ability, with a forward and reverse inference probability of 36.2% and 59.4%, respectively, followed by the emotion regulation ability and emotion acceptance ability. The results of this study reveal the important potential influence of emotion management ability on task completion efficiency enhancement, and the formulation of task completion efficiency enhancement strategies based on the perspective of emotion management ability can effectively enhance employee task performance, which in turn promotes the overall development and competitive advantage of enterprises.
- Research article
- https://doi.org/10.61091/jcmcc127b-533
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127b
- Pages: 9707-9743
- Published Online: 16/04/2025
With the continuous improvement of positioning accuracy of high-power fiber lasers and industrial robots, the use of robots for laser processing has been widely applied in the field of industrial manufacturing. This article designs a laser cutting robot and control method, using ABB-IRB120 dual robotic arms, specifically applied to the cutting of railway sleeper steel bars. The robot vision system can automatically recognize the steel bars of railway sleepers, and the overall cutting process is controlled by a safe and reliable PLC. The follow-up system is controlled by STM32 and integrates a dual loop competition algorithm to establish a control model namely “feedforward compensation PID+sliding mode control”. The visualization simulation experiment results of trajectory tracking analysis have verified that the model has the advantages of fast response and high control accuracy. The experimental results show that the robot can achieve high-speed, stable, and precise cutting of rail sleepers, and can meet the needs of cutting various types of rail sleeper steel bars.
- Research article
- https://doi.org/10.61091/jcmcc127b-532
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127b
- Pages: 9691-9706
- Published Online: 16/04/2025
To overcome the obstacle of ranging by using the same type of ultrasonic transducer in two medium such as water and air, whose sound wave transmission characteristics are of significantly different, this paper proposed a dual medium ultrasonic ranging scheme, with the application background of cast-in-place piles’ borehole diameter measurement. Based on the analysis of media’s influence mechanism on ultrasonic ranging performance, a high-sensitivity weak signals conditioning circuit is constructed, with front-end amplifier, bandpass filter, demodulator, back-end amplifier and lowpass filter, which enables the ultrasonic transducer dedicatedly designed for underwater ranging can work in the air. On this basis, by designing a dual channel signal conditioner and increasing the ultrasonic emission power, the problem of ultrasonic ranging in air and underwater using unique type of transducer is solved, and the media in which ranging is ongoing can be distinguished at the same time. To verify the scheme’s effectiveness, an experimental platform is built and ranging experiment is conducted in both air and water. The result proves that the expected ranging range and accuracy can be achieved under both media conditions, which lays theoretical foundation and provides engineering approach for similar scenarios.
- Research article
- https://doi.org/10.61091/jcmcc127b-531
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127b
- Pages: 9679-0690
- Published Online: 16/04/2025
AI (Artificial Intelligence) technology and multimedia technology are changing with each passing day, and have gradually involved in various fields. At the same time, the use of these technologies in the field of education has also effectively promoted the assessment of English classroom teaching. Since good classroom teaching is inseparable from evaluation, then scientific and reasonable teaching assessment of English classroom teaching can be guaranteed. At present, there is a lack of English teaching index assessment system for AI and multimedia technology. Therefore, this paper conduced in-depth research on improving the assessment system of English classroom teaching, and expounded on AI and multimedia technology. This paper built an assessment system for English classroom teaching based on AI and multimedia technology, and innovated and improves the assessment system. The experiment showed that 85% of the teachers were satisfied with the assessment system of English teaching indicators based on AI and multimedia technology, and 70% of the teachers were satisfied with the assessment system of traditional English teaching indicators. The new system can help to promote a more objective and scientific assessment of English classroom teaching.
- Research article
- https://doi.org/10.61091/jcmcc127b-530
- Full Text
- Journal of Combinatorial Mathematics and Combinatorial Computing
- Volume 127b
- Pages: 9665-9678
- Published Online: 16/04/2025
With the rapid development of science and technology, culture, education and other fields, people’s demand for library and information materials is increasing, and the traditional library and information management can no longer meet this demand. However, at present, the security of library and information management has become an important issue to be solved. Library and information management should also prevent external intrusion to ensure that users and administrators manage within their authority, so as to stop unauthorized operations in time, and timely detect and stop illegally changed documents. This paper aimed to study the effectiveness of artificial intelligence (AI) security and library and information management in the Internet of Things (IoT). This paper proposed RSA (Rivest-Shamir-Adleman, RSA) algorithm to encrypt books and information. However, the algorithm had limitations. Therefore, the Elliptic Curve Cryptography (ECC) algorithm has been adopted again. ECC is currently the most effective and feasible solution for large-scale distributed open networks. The scheme has adopted the characteristics of hierarchical group management, fewer keys stored in nodes, less calculation of key update, and historical group key storage mechanism, which met the needs of file management. The experimental results in this paper showed that when the size of the tested document was 15M, the time for RSA and ECC to encrypt the document was 42ms and 40ms respectively. When the document size was 90M, the time for RSA and ECC to encrypt the document was 502ms and 256ms respectively. It can be seen that the encryption time of the two algorithms is similar when the document is small. However, as the document becomes larger and larger, the encryption time of the two algorithms has been widened. Keywords: Library and Information Management, Rivest Shamir Adleman, Artificial Intelligence, Internet of Things, Elliptic Curve Cryptography




