期 24 ， 2022
- 摘要：Aiming at the problem of hydraulic speed regulation circuit of mine pressure loading test bench, in order to meet the more stable speed regulation operation of rock model by the test bench, this paper designs and simulates the hydraulic speed regulation circuit of the test bench. Through the hydraulic simulation software AMESim, the bypass speed control valve element and the speed control circuit and pressure holding circuit of the hydraulic system are modeled and analyzed, and the curve graph obtained by the simulation is analyzed, which verifies the correctness of the design and modeling of the speed regulating element and the two circuits, and therefore, the design meets the performance requirements of the mine pressure loading test bench.关键词：ground pressure loading test bench;hydraulic loading system;AMESim;simulation analysis
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发布时间：2023-08-03 - 摘要：In order to solve the problem that the deep learning model used for signal modulation recognition has a large number of parameters and computation, a lightweight neural network model called TBCLDNN-ECA (Two-Stream Bottleneck Convolution Long-Short Term Memory Fully Connected Deep Neural Network with Efficient Channel Attention Module) is proposed. The model first uses two Bottleneck CNN (Convolutional Neural Networks) branches to extract different features of the signal in parallel. After the two branches are merged, attention mechanism and BiLSTM (Bi-directional Long Short-Term Memory) are used to further extract the sequence features of the signal. Simulation experiments are conducted on the dataset RadioML2016.10a. The results show that the average recognition accuracy of the proposed model reaches 92.1% at the signal to noise ratio of 0~18 dB, and 93.53% at the signal to noise ratio of 18 dB. The recognition accuracy is better than the current popular modulation recognition model. At the same time, the model parameters and calculation amount have been reduced to a certain extent. Therefore, this model has the advantage of less model parameters and computation without loss of identification accuracy.关键词：modulation recognition;lightweight neural network;bottleneck structure
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发布时间：2023-08-03 - 摘要：In response to the difficulties and poor accuracy of clinical diagnosis for patients with acute exacerbation of chronic obstructive pulmonary disease, we propose to construct a clinical prediction model based on machine learning and use SHAP model interpretability to screen key disease features. By comparing the predictive performance and feature importance of different machine learning models and conducting model interpretability analysis, we aim to find the optimal model and disease marker features. We selected a dataset of 99 patients with COPD from the University College London patient database. We used six machine learning algorithms to establish a prediction model and evaluated the model using k-fold cross-validation and evaluation metrics such as ROC-AUC and f1 score. We then used SHAP for interpretability analysis of the prediction model. Among all the models, the SVC model had the best predictive performance, with an accuracy of 0.93 and AUC of 0.99. FEV1PRED and FEV1 were identified as important factors affecting COPDSEVERITY. The machine learning prediction model can provide effective decision-making support for the diagnosis of COPDSEVERITY.关键词：lower respiratory tract modeling;chronic obstructive pulmonary disease;computational fluid dynamics;numerical simulation
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发布时间：2023-08-03 - 摘要：To support users getting data resources from multiple data centers according to their needs and rights, realize data resources inter-regional sharing and collaboration applying, a sharing service architecture for heterogeneous data between data centers is given. The given architecture has ability of unified retrieval access to heterogeneous database from multiple data centers, user and task oriented accuracy search and intellectual recommendation, task oriented data product customization production and data subscription and distribution. Eventually, it can help data discoverability, accessibility, comprehensibility, interactivity, dependability, managibility, meanwhile, it can help users effectively use and organize data.关键词：data centers;inter-regional sharing;collaboration applying;data service
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发布时间：2023-08-03 - 摘要：Digitization and greenization are becoming new driving forces to accelerate the recovery of the global economy. Promoting the green and low-carbon development of digital infrastructure and accelerating the deep integration of digitalization and greenization are the only ways to achieve high-quality economic and social development in China. At present, digital infrastructure such as 5G networks and data centers is playing an important role in promoting the green transformation of traditional industries, but its own energy saving and carbon reduction issues have also received widespread attention. It is urgent to give full play to the decisive role of digital technology in promoting energy conservation and carbon reduction, effectively promote the low-carbon development of digital infrastructure, and alleviate the “lock-in effect” of traditional infrastructure’s continuous impact on the ecological environment and climate change. It is recommended to formulate an action plan and roadmap to promote the realization of “dual carbon” goals with digital technology, accelerate energy conservation and carbon reduction of digital infrastructure, and drive energy, transportation, industry, construction and other industries to achieve energy conservation and carbon reduction through digital transformation, so as to promote the comprehensive green transformation of economic and social development.关键词：digitalization;greenization;digital infrastructure;5G networks;data centers;digital technology
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发布时间：2023-08-03 - 摘要：In recent years, the scale and total energy consumption of China’s data centers have been growing, and the green development of data centers has become an important part of industrial green and low-carbon development. This paper summarizes and evaluates the effect of the previous national green data center selection, discusses the necessity and ideas of adjusting the evaluation index system of green data center, and looks forward to the future work.关键词：data centre;energy efficiency level;green development
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发布时间：2023-08-03 - 摘要：The transformation of scientific and technological achievements is the core content of the integration of science, technology and economy, and is an important link in the development of the national economy. This article analyzes the overall situation of the transformation of scientific and technological achievements in China and the existing problems in terms of systems, evaluations, incentives, and other aspects. It explores the next key directions and work suggestions, and follows the principle of “overall layout and steady progress” to provide new ideas and methods for the transformation of scientific and technological achievements through various means such as setting standards, expanding channels, cultivating talents, building platforms, and promoting applications, promote the healthy development of the evaluation and transformation of scientific and technological achievements.关键词：scientific and technological achievements;scientific and technological evaluation;maturity;transformational incentives;scientific and technological talents;application practice
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发布时间：2023-08-03
RESEARCH PAPER
- 摘要：For the cultivation of professional postgraduate students, colleges and universities not only need to enhance students' theoretical knowledge reserve, but also need to cultivate students’ practical ability and problem-solving ability. Therefore, how to effectively combine enterprises and make the integration mode of industry and education implemented by colleges and universities is a problem worth thinking and urgent solution. In view of the problem that the current professional master research, production and teaching integration training mechanism are not perfect, this paper takes the electronic information master students of Guangdong Polytechnic Normal University as an example to discuss the improvement and optimization of the curriculum system, the sublimation of the postgraduate “four selfs”, the establishment of the long-term operation mechanism of school-enterprise cooperation, the construction of the mutual promotion mechanism of examination and teaching and the construction of practical training base. It is expected to provide some reference for the construction of the integrated training mechanism of professional master’s research, production and teaching and the construction of the education system for postgraduates.关键词：postgraduate training;integration of production and education;school-enterprise cooperation;“Four Selfs” education model
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发布时间：2023-08-03 - 摘要：“Principles of Communication” is a very important professional core course. With the development of educational science and technology, the traditional teaching mode of simple lecturing is no longer suitable for talent training. Therefore, this paper explores the research-oriented teaching mode of “Principles of Communication” under the background of new engineering, promotes the iteration of teaching mode by improving teaching methods and updating teaching ideas. While strengthening students’ practical teaching and improving their practical ability, it fully combines the simulation analysis and experimental teaching links related to communication principles to introduce new communication technologies and constantly update the teaching content. To provide students with quality learning experience and harvest.关键词：course of “Principle of Communication”;Research-based teaching;Teaching methods;Practical teaching;Experimental teaching;Teaching idea
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发布时间：2023-08-03
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