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A review of Direct Power Control Technologies for Three-Phase Voltage PWM Rectifiers 三相电压 PWM 整流器的直接功率控制技术综述
Zihan Liu
This article reviews the direct power control methods of three-phase voltage-type PWM rectifiers, including those based on virtual flux linkage (VF-DPC), model prediction (MP-DPC), and dual switch table. First, the basic topology of the three-phase voltage-type PWM rectifier is introduced, and its key role in the energy conversion process is explained. Subsequently, the implementation mechanisms, advantages and disadvantages of various direct power control strategies and their performance in practical applications are comparatively analyzed. Finally, the article looks forward to future development trends in three-phase voltage-type PWM rectifier direct power control technology, and points out directions for further research, including algorithm optimization, hardware implementation, and broader application promotion.
本文综述了三相电压型 PWM 整流器的直接功率控制方法,包括基于虚拟磁通联动(VF-DPC)、模型预测(MP-DPC)和双开关表的方法。首先,介绍了三相电压型 PWM 整流器的基本拓扑结构,并解释了其在能量转换过程中的关键作用。随后,比较分析了各种直接功率控制策略的实现机制、优缺点及其在实际应用中的性能。最后,文章展望了三相电压型 PWM 整流器直接功率控制技术的未来发展趋势,并指出了进一步研究的方向,包括算法优化、硬件实现和更广泛的应用推广。
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引用次数: 0
Analysis of the Combination of Enterprise Recruitment and College Student Employment Based on Data Visualization 基于数据可视化的企业招聘与大学生就业结合分析
Wayuan Xiao
The purpose of this paper is to explore how to combine the recruitment needs of enterprises with the employment of college students through data visualization technology, and to provide new insights for addressing the employment matching challenge. First of all, it will introduce the current situation and challenges of enterprise recruitment and college student employment, and analyze the problems and reasons for this. Secondly, a method based on data visualization will be proposed. By collecting and analyzing relevant data from the Boss direct employment platform, including educational requirements, salary, work experience, occupation type, and other information. Visualization tools will be used to present data, and these tools will also demonstrate the recruitment needs of enterprises. Then, it will explore how to make targeted recommendations and provide career guidance based on the results of data analysis to promote a better match between enterprises and college students. Finally, the research results will be summarized, and the future research direction and development trend will be prospected.
本文旨在探讨如何通过数据可视化技术将企业招聘需求与大学生就业相结合,为解决就业匹配难题提供新的启示。首先,介绍企业招聘与大学生就业的现状与挑战,分析其中存在的问题与原因。其次,提出一种基于数据可视化的方法。通过收集和分析 Boss 直聘平台的相关数据,包括学历要求、薪资待遇、工作经验、职业类型等信息。将使用可视化工具来呈现数据,这些工具也将展示企业的招聘需求。然后,将探讨如何根据数据分析结果进行有针对性的推荐和职业指导,促进企业与大学生更好地匹配。最后,总结研究成果,展望未来研究方向和发展趋势。
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引用次数: 0
Tour Enhance: A Novel Rule-Based Travel Planning System 增强旅游:基于规则的新型旅行规划系统
Zihan Guan
Tourism significantly contributes to economic growth, particularly evident from China’s rapid post-recovery increase in travel demand. This surge underscores the necessity for accessible, well-organized tourist information. Given the vast number and broad distribution of tourist sites, intelligent filtering and visualization of these locations are crucial. This paper introduces Tour Enhance, an interactive system designed to dynamically exchange information between the system and its users. Unlike traditional static methods, Tour Enhance utilizes real-time processing to tailor travel recommendations to individual user preferences, thereby improving user engagement and satisfaction. This study undertakes three key tasks: statistical analysis and visualization of tourist data, rule-based recommendation generation, and user survey-based evaluation of these recommendations. The effectiveness of Tour Enhance was assessed through a user study with 57 participants, who highly rated the system on interface usability, functionality, and accuracy of recommendations. The results demonstrate that Tour Enhance effectively enhances the travel planning process, highlighting the significant advantages of integrating interactive systems and personalized data visualization in tourism. This research contributes to the advancement of human-computer interaction applications in tourism and lays the groundwork for future studies focused on enhancing user experiences through technological innovations.
旅游业对经济增长贡献巨大,中国经济复苏后旅游需求的快速增长尤其明显。这种激增凸显了旅游信息的可访问性和良好组织的必要性。鉴于旅游景点数量庞大、分布广泛,对这些地点进行智能过滤和可视化至关重要。本文介绍的 Tour Enhance 是一个互动系统,旨在实现系统与用户之间的动态信息交换。与传统的静态方法不同,Tour Enhance 利用实时处理,根据用户的个人喜好量身定制旅游推荐,从而提高用户的参与度和满意度。本研究承担了三项关键任务:游客数据的统计分析和可视化、基于规则的推荐生成,以及对这些推荐进行基于用户调查的评估。通过对 57 名参与者进行用户研究,评估了 Tour Enhance 的有效性,他们对系统的界面可用性、功能性和推荐的准确性给予了高度评价。研究结果表明,Tour Enhance 有效地改进了旅游规划流程,凸显了在旅游业中整合交互系统和个性化数据可视化的显著优势。这项研究有助于推动人机交互在旅游业中的应用,并为今后通过技术创新提升用户体验的研究奠定了基础。
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引用次数: 0
The Regulatory Role of Sleep Hormones, Neurotransmitters, and Gene Expression in Rapid Eye Movement Sleep 睡眠激素、神经递质和基因表达在快速眼动睡眠中的调节作用
Enhao Liu
Rapid Eye Movement (REM) sleep typically initiates approximately 90 minutes following the onset of sleep. REM sleep is crucial for memory consolidation and learning. It also supports physical recovery and promotes cell regeneration, neurotransmitter transmission, and immune function. The regulating function of REM sleep remains ambiguous despite numerous advancements in its investigation. The absence of neurotransmitter receptors reduces REM sleep, and altered environmental conditions have a corresponding effect on REM sleep. This study summarized how REM sleep interacts with hormones, neurotransmitters, and gene expression. The study found novel properties of REM sleep, explored the connection between cognitive and emotional functions with REM sleep. REM sleep is a stage of increased brain activity, and the study of REM sleep helps us to better understand brain function and neural activity. Examining REM sleep allows for a thorough exploration of the brain’s operational processes, offering valuable insights for neuroscience research. Further study on REM sleep in the future could focus on impact of sleep on body and brain processes, leading to a better comprehension of treating sleep disorders and advancing cognitive neuroscience.
快速眼动(REM)睡眠通常在入睡后约 90 分钟开始。快速眼动睡眠对记忆巩固和学习至关重要。它还有助于身体恢复,促进细胞再生、神经递质传递和免疫功能。尽管对快速动眼期睡眠的研究取得了诸多进展,但其调节功能仍不明确。神经递质受体的缺失会减少快速眼动睡眠,而环境条件的改变也会对快速眼动睡眠产生相应的影响。这项研究总结了快速动眼期睡眠如何与激素、神经递质和基因表达相互作用。研究发现了快速动眼期睡眠的新特性,探讨了认知和情感功能与快速动眼期睡眠之间的联系。快速动眼期睡眠是大脑活动增加的一个阶段,对快速动眼期睡眠的研究有助于我们更好地了解大脑功能和神经活动。对快速动眼期睡眠的研究可以深入探讨大脑的运行过程,为神经科学研究提供宝贵的见解。未来对快速动眼期睡眠的进一步研究可能会侧重于睡眠对身体和大脑过程的影响,从而更好地理解睡眠障碍的治疗和认知神经科学的发展。
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引用次数: 0
A Review of Research on Hospital Electronic Medical Record Management System Based on Cloud Computing 基于云计算的医院电子病历管理系统研究综述
Jingbai Zhang
With the increasing development of computer science, cloud computing has had a revolutionary impact on various industries. The application of cloud computing technology in the electronic medical record management system of hospitals is not only of great significance to improve the efficiency of medical information management, but also can effectively deal with the security challenges of medical record data. The article firstly provides an overview of cloud computing, then introduces the importance of hospital electronic medical record management system, and at the same time analyses the limitations and challenges of traditional electronic medical records, and secondly summarizes the key issues in the application of cloud computing in hospital electronic medical record management system.
随着计算机科学的日益发展,云计算对各行各业产生了革命性的影响。在医院电子病历管理系统中应用云计算技术,不仅对提高医疗信息管理效率具有重要意义,还能有效应对病历数据的安全挑战。文章首先对云计算进行了概述,然后介绍了医院电子病历管理系统的重要性,同时分析了传统电子病历的局限性和挑战,其次总结了云计算在医院电子病历管理系统中应用的关键问题。
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引用次数: 0
Current status of TiO2 photocatalytic reduction of carbon dioxide 二氧化钛光催化还原二氧化碳的现状
Zhikai Cheng
this study summarizes the current research status and development trend of TiO2 photocatalytic reduction of carbon dioxide, including the reaction mechanism, metal-loaded TiO2, semiconductor composite TiO2, and organic photosensitizer-modified TiO2, and shows that the metal-loaded TiO2 enhances the catalytic activity, and in particular, copper-loaded catalysts on the surface of TiO2 have the potential. Semiconductor composite TiO2 enhanced the photogenerated carrier transport efficiency and improved the catalytic activity. Modification of TiO2 with organic photosensitizers can improve the photocatalytic efficiency, but challenges such as stability and light absorption efficiency need to be addressed.
本研究总结了TiO2光催化还原二氧化碳的研究现状和发展趋势,包括反应机理、金属负载TiO2、半导体复合TiO2和有机光敏剂改性TiO2,结果表明金属负载TiO2增强了催化活性,特别是TiO2表面的铜负载催化剂具有潜力。半导体复合 TiO2 增强了光生载流子的传输效率,提高了催化活性。用有机光敏剂修饰 TiO2 可以提高光催化效率,但需要解决稳定性和光吸收率等难题。
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引用次数: 0
A review of YOLO-based traffic sign target detection 基于 YOLO 的交通标志目标检测综述
Siteng Liu
YOLO (You Only Look Once) as an efficient target detection algorithm has significant advantages in the field of image recognition and traffic sign detection. The continuous development of autonomous driving technology needs to be supported by an algorithm that can quickly and accurately identify traffic signs, vehicles, pedestrians and other important objects on the road. By using the YOLO algorithm, we can achieve fast and accurate recognition of traffic signs, which is of great significance for improving the safety of autonomous driving technology. This study firstly introduces the general framework of YOLO series algorithms, including the network structure, introduces the development history of YOLO series and analyses the characteristics of each generation of algorithms, then discusses the application of YOLO algorithms in the field of traffic sign recognition, and finally summarizes the existing problems and puts forward a few points of possible optimization directions in the future.
YOLO(只看一次)作为一种高效的目标检测算法,在图像识别和交通标志检测领域具有显著优势。自动驾驶技术的不断发展需要一种能够快速、准确识别交通标志、车辆、行人和道路上其他重要物体的算法作为支撑。利用 YOLO 算法,我们可以实现对交通标志的快速、准确识别,这对提高自动驾驶技术的安全性具有重要意义。本研究首先介绍了 YOLO 系列算法的总体框架,包括网络结构,介绍了 YOLO 系列算法的发展历程,分析了各代算法的特点,然后讨论了 YOLO 算法在交通标志识别领域的应用,最后总结了存在的问题,并提出了几点未来可能的优化方向。
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引用次数: 0
The foundation, current situation and future prospects of pre-training large language models 预训练大型语言模型的基础、现状和前景
Haoran Han, Siyao Wu, Jinyao Yang, Yizhuo Zhao
The field of artificial intelligence has developed rapidly recently, and large language model technology, as a representative technology of it, can provide general knowledge and make many downstream tasks easier and more convenient. However, although many people use large language models to do some work, they still lack a systematically summarized literature. Therefore, in this article, we made a systematic summary. We first wrote about the early large language models, then we presented the development of GPT and how to use the GPT model, then we introduced the advanced GPT models, and finally we mentioned the risks and challenges faced by the GPT model. Our work can help users better use large language models.
人工智能领域近来发展迅速,大语言模型技术作为其中的代表性技术,可以提供常识性的知识,使许多下游任务变得更加简单方便。然而,虽然很多人利用大语言模型做了一些工作,但仍然缺乏系统总结的文献。因此,在本文中,我们做了系统的总结。我们首先写了早期的大型语言模型,然后介绍了 GPT 的发展以及如何使用 GPT 模型,接着介绍了先进的 GPT 模型,最后提到了 GPT 模型面临的风险和挑战。我们的工作可以帮助用户更好地使用大型语言模型。
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引用次数: 0
Exploring the Use of Machine Learning in Healthcare Prediction 探索机器学习在医疗预测中的应用
Zhiyuan Ren
The development process of modern society is accelerated, and at the same time, people’s need for medical care deepens. The main purpose of this study is to summarize the general situation of the current application of machine learning in medical prediction. This paper mainly analyzes the current situation of the application of machine learning models as well as the existence of problems by dissecting the current situation of the application of machine learning models and carries out a comprehensive analysis of its features. It focuses on analyzing the issues in the application of machine learning in disease prediction in imaging diagnosis, cancer risk assessment, cancer recurrence prediction, and mental illness prediction and make an arrangement summary about the current status of machine learning models in various healthcare prediction domains and owning characteristics The ultimate goal of this paper is to conclude the extent to which machine learning models can play a role in the context of the current continuous development of medical technology.
现代社会发展进程加快,与此同时,人们对医疗保健的需求也日益加深。本研究的主要目的是总结当前机器学习在医学预测中应用的总体情况。本文主要通过剖析机器学习模型的应用现状以及存在的问题,对其特点进行全面分析。本文的最终目的是总结在当前医疗技术不断发展的背景下,机器学习模型能在多大程度上发挥作用。
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引用次数: 0
Uses of Interactive Data Visualization in Air Traffic Control Systems 交互式数据可视化在空中交通管制系统中的应用
Kaiheng Huang
Air Traffic Control (ATC) systems are complex systems responsible for maintaining safe air traffic within a designated airspace. They are essential for the safe flow of commercial flights in and out of places which can significantly reduce aerial accidents. In recent years, ATC systems have seen concerning problems in large-scale data management and inefficiencies in decision making which can lead to human error. To resolve these issues, the use of Interactive Data Visualization (IDV), a powerful method of presenting complex datasets in an engaging and comprehensible manner instead of using boring charts, can be employed. There have been prior attempts to use IDV methods in various ATC systems. Although these attempts of specializing IDV in aviation have made major contributions, most of these other proposals lack conclusions and essential aspects such as specific environmental factors of the specified airspace, the operating systems of specific airports, in addition with specialized utilization of IDV in different kinds of airspaces. In this paper, a systematic review of previous works will be conducted, the proposal of new ways for utilizing IDV in ATC systems will be discussed, and previous factors that were not considered before will be analyzed. The paper will start off by discussing the ATC systems we have today, their problems, the potential usage of IDV in ATC systems, how it would work, general proposals of potential utilization methods, the advantages and disadvantages of IDV in ATC systems, and future outlooks. The paper will provide a general overview and directions for the future of ATC systems utilizing IDV.
空中交通管制(ATC)系统是负责在指定空域内维持空中交通安全的复杂系统。它们对商业航班安全进出这些地方至关重要,可大大减少空中事故。近年来,空管系统在大规模数据管理方面出现了令人担忧的问题,而且决策效率低下,容易导致人为错误。为了解决这些问题,可以使用交互式数据可视化(IDV)这种强大的方法,以引人入胜、易于理解的方式呈现复杂的数据集,而不是使用枯燥的图表。以前曾有人尝试在各种空管系统中使用交互式数据可视化方法。虽然这些将 IDV 应用于航空领域的尝试做出了重大贡献,但大多数其他建议都缺乏结论和重要方面,如特定空域的具体环境因素、特定机场的操作系统,以及 IDV 在不同类型空域的专门应用。本文将对以前的工作进行系统回顾,讨论在空管系统中利用 IDV 的新方法建议,并分析以前未考虑的因素。本文将首先讨论我们目前拥有的空管系统、其存在的问题、IDV 在空管系统中的潜在用途、其工作原理、潜在使用方法的一般建议、IDV 在空管系统中的优缺点以及未来展望。本文将对利用 IDV 的空管系统的未来进行总体概述和展望。
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引用次数: 0
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Science and Technology of Engineering, Chemistry and Environmental Protection
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