卷 6 ， 期 14 ， 2023
- 摘要：Electromagnetic induced transparent (EIT) metasurfaces have extremely high transmission coefficients, which have been widely used in terahertz modulators, sensors and other fields in recent years. However, the full wave simulation of large EIT metasurface array often consumes enormous computational resources and time. In order to accelerate the design process of EIT metasurface array, a design method based on combination of transfer function and neural networks model is proposed. The vector fitting technique based on transfer function is utilized to fit the electromagnetic response of the metasurface. In the proposed model, the poles and residues of the transfer function replace the discrete electromagnetic response as inputs to greatly reduce the input dimension of the model and simplify the structure of the network. An EIT metasurface based on high and low resonant rings is selected as an example to verify the effectiveness of the proposed model. In addition, compared to directly using discrete electromagnetic response as input to the neural network model, the proposed neural netwrok model based on transfer function has higher efficiency. The proposed model in this study can quickly generate corresponding structural parameters to match the expected electromagnetic response, thereby significantly simplifying the design process.关键词：neural network;transfer function;vector fitting;electromagnetic induced transparent;metasurface54|142|0更新时间：2025-03-26
- 摘要：Web information systems in B/S (Browser/Server) mode are vulnerable to Web attacks due to the openness of providing external services and the defects of Internet protocols such as HTTP (Hypertext Transfer Protocol), which brings losses to information service providers and users. Traditional security measures often start from a certain point of view and lack of overall consideration. In this paper, a Web application security framework is designed, which integrates network environment, hard and soft infrastructure, security policy, management mechanism and other factors to improve security capability from multiple levels. Practice shows that the framework could guarantee the security features of integrity, confidentiality, availability, controllability and auditability effectively, and provide a solution for Web information system security.关键词：Web information system;B/S mode;security framework;security strategy50|60|0更新时间：2025-03-26
- 摘要：Local path planning is a crucial component of the environmental intelligent sensing system used by unmanned aerial vehicles (UAVs). This paper presents a novel algorithm for local path planning that addresses the environmental adaptability issue associated with traditional methods. The key idea is to stratify the UAV's field of view and to dynamically determine the levels of field of view to be used and the resolution of each level based on the environmental complexity of the field of view. In addition, regions are evaluated according to the density of obstacles, and candidate directions are determined. Finally, the candidate directions are comprehensively analyzed using a modified cost function, and the UAV's local forward obstacle avoidance planning is obtained. This algorithm demonstrates the ability of UAVs to adapt to changing environmental conditions, which is essential for effective navigation and obstacle avoidance. The use of multi-perspective and multi-resolution approaches enables more accurate assessments of the environment and increased maneuverability for UAVs. Ultimately, this research has the potential to improve UAV operations in a wide range of applications, including search and rescue, mapping and surveying, and military operations.关键词：UAVs;local path planning;environmental intelligent sensing;auto obstacle avoidance84|446|0更新时间：2025-03-26
- 摘要：With the rapid development of digitization, information, intelligence and simulation technology, “digital twin”, as a new emerging technology in the digital era, has become more and more the research hotspot pursued by all walks of life. In this paper, the basic concept, development status and key technologies of “digital twin” are introduced, and the challenges and applications of digital twin technology in the construction of radio and television system projects are studied and explored, in order to provide some new concepts and new ideas for radio and television practitioners.关键词：radio and television;digital twin;virtual interaction;Intelligent operation and maintenance117|41|0更新时间：2025-03-26
RESEARCH PAPER
- 摘要：This paper comprehensively summarizes and analyzes the new progress of radio and television network in infrastructure construction, 700 MHz frequency migration, radio and television 5G commercial, IPv6 (Internet Protocol Version 6) upgrade and evolution, intelligent recommendation technology, emergency broadcasting system, "Smart Radio and Television +" ecology, standardization work, digital village and other aspects.关键词：Radio and Television Network;Technique fusion;Radio and Television 5G;Smart Radio and Television116|727|0更新时间：2025-03-26
SURVEYS & TUTORIALS
- 摘要：With updates and iterates of the service form in broadcasting and television industry, cloud computing and IP technology are constantly applied in traditional broadcasting and television systems. The traditional security protection architecture has become unsuitable for new service form, which is unable to fully utilize the security capabilities of network security facilities. This paper analyzes the security issues in the process of service architecture upgrade faced by the traditional broadcasting and television systems, and proposes the design of network security data center based on containerized microservice, which integrates existing security capabilities and standardizes device interfaces attempted to provide ideas for problem-solving.关键词：network security data center;containerized;microservice41|150|0更新时间：2025-03-26
- 摘要：Broadband operators provide broadband internet traffic services to broadband users by aggregating multiple traffic export resources and multiple Internet CP (Content Provider) resources. Due to differences in quality and price between export resources and CPs, in order to improve the service quality of operator networks, improve broadband user experience and satisfaction, operators urgently need to consider strategies such as cost priority, quality priority, or balance to achieve export broadband adjustment. This article proposes and establishes a rationalized scheduling strategy algorithm model for automatically generating multiple nodes and resources, which can effectively achieve a dual balance between quality and cost in internet traffic scheduling.关键词：broadband Internet;quality;cost;traffic scheduling43|187|0更新时间：2025-03-26
- 摘要：With the advent of a new wave of technological revolution and industrial transformation, the cultivation of innovative talent requires not only the enhancement of students’ foundational theoretical knowledge but also the nurturing of their ability to adapt to rapid changes through learning and practice. Against this backdrop, the integration of industry-driven education and the unity of academia and enterprises have emerged as crucial avenues for higher education reform.In this article, we take the innovative cooperation of the “BUPT Huawei Research Institute” as a case study, hoping to provide some feasible ideas to solve current prevalent issues, such as the misalignment between instructional content and corporate needs, outdated educational team-building models, the lack of congruence between teaching materials and corporate research and development activities, and inconsistency between curriculum design and industry demands, which are commonly encountered in the current teaching process. We propose an instructional model driven by corporate needs, advocate for the establishment of open educational teams based on specific industry applications, and introduce a multi-dimensional graduate quality training program that integrates industry and education. Our ultimate goal is to realize an innovative, practice-oriented course design, delving deeply into the collaborative model of talent cultivation between universities and enterprises, and enhancing students’ ability to apply what they’ve learned in real-world scenarios.关键词：Curriculum and teaching theory;integration of production;education and practice;open mode talent training81|120|0更新时间：2025-03-26
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