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The risk of dandelion invasion 蒲公英入侵的风险
Pub Date : 2024-02-22 DOI: 10.56028/aetr.9.1.699.2024
Jieyi Zhang, Yicui Liao, Zhiyuan Ren
Dandelion originated in the Mediterranean coastal region, under suitable conditions, its seeds can spread and spread with the wind, and there are a large number of seeds. This article uses the WINDISPER-L model to analyze the propagation distance of seeds under different settling rates, settling heights, and wind speeds. And it was considered that the number of seeds and inflorescences may vary due to random factors such as climate during different growth cycles. After four growth cycles, most of the dandelion falls about 30 meters away from its mother body and grows and reproduces normally. Subsequently, when establishing a risk assessment system for invasive species, three aspects were considered: the characteristics of the species themselves, the natural environment, and human activities. The Analytic Hierarchy Process (AHP) was used to assign weights to indicators at each level, and ultimately all indicators at all levels passed the consistency test. And use a risk assessment system to calculate the potential risks that may arise from the invasion of dandelion, Canadian Solidago, and Ambrosia trifida. This can provide some inspiration and reference for corresponding managers in evaluating whether a species is an invasive species.
蒲公英原产于地中海沿岸地区,在适宜的条件下,其种子可随风传播和扩散,种子数量众多。本文利用 WINDISPER-L 模型分析了不同沉降速度、沉降高度和风速下种子的传播距离。并考虑到在不同的生长周期中,种子和花序的数量可能会因气候等随机因素而变化。蒲公英经过四个生长周期后,大部分落在离母体约 30 米的地方,正常生长繁殖。随后,在建立入侵物种风险评估系统时,考虑了三个方面:物种本身的特征、自然环境和人类活动。采用层次分析法(AHP)对各个层次的指标进行权重分配,最终所有层次的指标都通过了一致性测试。并利用风险评估系统计算蒲公英、加拿大实心草和三叶伏牛草入侵可能带来的潜在风险。这可以为相应的管理者在评估一个物种是否为入侵物种时提供一些启发和参考。
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引用次数: 0
A novel decomposition-based ensemble broad learning system for short-term load forecasting 用于短期负荷预测的基于分解的新型集合广泛学习系统
Pub Date : 2024-02-21 DOI: 10.56028/aetr.9.1.744.2024
Yihan Tian
Load forecasting of the power system plays a key role in the production planning and actual operation scheduling of power systems. However, as the power system becomes larger and more complex, it is very important to propose a forecasting model with high accuracy and low computational cost. In this paper, a novel short-term load forecasting model is proposed, which combines the empirical wavelet transform (EWT) and the broad learning system (BLS). The advantage of EWT is that it can decompose the signal into multiple local frequency bands, select the local wavelet function adaptively, and overcome the modal mixing problem caused by the discontinuity of the signal time-frequency scale. While, the advantage of BLS is that it allows the model to learn more by stretching the width, and uses ridge regression to make it less time consuming and faster. To verify the effectiveness, the model is compared with some other state-of-the-art methods, and several performance estimations indicate that the model has high accuracy and low computational cost.
电力系统的负荷预测在电力系统的生产计划和实际运行调度中起着关键作用。然而,随着电力系统变得越来越大、越来越复杂,提出一种高精度、低计算成本的预测模型就显得非常重要。本文提出了一种新型的短期负荷预测模型,它结合了经验小波变换(EWT)和广义学习系统(BLS)。EWT 的优势在于它能将信号分解为多个局部频带,自适应地选择局部小波函数,克服了信号时频尺度不连续造成的模态混合问题。而 BLS 的优势在于通过拉伸宽度让模型学习更多,并使用脊回归使其耗时更少、速度更快。为了验证其有效性,我们将该模型与其他一些最先进的方法进行了比较,结果表明该模型具有较高的精度和较低的计算成本。
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引用次数: 0
Analysis of overvoltage impact on shell-type on-board traction transformer by multi-physics field simulation 通过多物理场仿真分析过电压对外壳式车载牵引变压器的影响
Pub Date : 2024-02-21 DOI: 10.56028/aetr.9.1.715.2024
Ziyue Zhang, Zijing Wang, Song Xiao
With the rapid development and increasing demands for the high-speed railway in China, it is of great significance to examine the defects of the high-speed train and ensure the safety of the operating railway. In the actual operation of the high-speed train, there is a split-phase section to transit the train to the next substation power supply arm. In this particular stage, operational overvoltage would occur as the VCB and the pantograph switch on and off, which threatens the safety of the operation of high-speed trains and contributes to the breakdown of transformer windings, which is indispensable in transformer operation. In this work, a finite element model of shell type on board traction transformer is constructed and multi-physics field simulation results, including electromagnetic field, temperature field, and flow velocity field, are analyzed to investigate the potential risky spots in the practical operation of high-speed train under overvoltage impulse, which could be supportive in maintaining the devices and detecting the winding defects.
随着我国高速铁路的快速发展和需求的不断增加,对高速列车的缺陷进行检测,确保运行铁路的安全具有重要意义。在高速列车的实际运行中,有一个分相段是将列车转运到下一个变电所供电臂。在这一特殊阶段,随着 VCB 和受电弓的开关,会出现运行过电压,威胁高速列车的运行安全,并导致变压器运行中不可或缺的变压器绕组击穿。本文构建了壳式车载牵引变压器的有限元模型,分析了电磁场、温度场和流速场等多物理场仿真结果,研究了过电压冲击下高速列车实际运行中的潜在风险点,为维护设备和检测绕组缺陷提供了支持。
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引用次数: 0
Multi-Vehicle Unmanned Following Operation Driving System Based on OpenMV 基于 OpenMV 的多车无人跟车驾驶系统
Pub Date : 2024-02-21 DOI: 10.56028/aetr.9.1.732.2024
Yongcheng Ming, Rongbiao Yan, Yiwei Ma, Kaibi Zhang, Luning Lei
In response to the low level of agricultural production automation and labor shortage, to improve the efficiency of agricultural machinery utilization and the reliability of automatic navigation, this paper designs an intelligent agricultural machinery system based on OpenMV for multi-vehicle unmanned following operations. Firstly, the kinematics of the agricultural machinery vehicle is analyzed, the path recognition and location line extraction are carried out using the OpenMV vision module, and the agricultural machinery steering control system is designed using the cascade PID closed-loop control technology, which achieves accurate steering control and path tracking on straight lines and curves. Subsequently, using embedded microcontrollers to manage the workflow, utilizing OpenMV visual modules to receive, store, and process positioning information, and sending control instructions to execution units such as the TB6612FNG motor drive module. Moreover, in response to the communication issues involving multiple HC-05 Bluetooth modules in the system's multi-vehicle communication, corresponding protocol specifications have been developed, and combined with the use of the HC-SR04 ultrasonic module to maintain dual vehicle distance and obstacle detection, achieving multi-vehicle collaborative following operations. The experimental results show that the system achieves a path recognition navigation accuracy of 93.4% and a communication success rate of 97.5% in simulating the process of farm harvesting and transportation, effectively proving the multi-vehicle collaboration of the system in the paper
针对农业生产自动化水平低和劳动力短缺的现状,为提高农业机械的利用效率和自动导航的可靠性,本文设计了基于OpenMV的多车无人跟车作业智能农机系统。首先,分析了农机车辆的运动学特性,利用 OpenMV 视觉模块进行了路径识别和位置线提取,并采用级联 PID 闭环控制技术设计了农机转向控制系统,实现了对直线和曲线的精确转向控制和路径跟踪。随后,利用嵌入式微控制器管理工作流程,利用 OpenMV 视觉模块接收、存储和处理定位信息,并向 TB6612FNG 电机驱动模块等执行单元发送控制指令。此外,针对系统多车通信中涉及多个 HC-05 蓝牙模块的通信问题,制定了相应的协议规范,并结合使用 HC-SR04 超声波模块保持双车距离和障碍物检测,实现了多车协同跟车作业。实验结果表明,在模拟农场收割和运输过程中,系统的路径识别导航准确率达到 93.4%,通信成功率达到 97.5%,有效证明了本文系统的多车协作能力。
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引用次数: 0
Enhancing 2D Path Search and PID Control for Autonomous Mobile Robots: A* Algorithm Optimization and Hardware 增强自主移动机器人的 2D 路径搜索和 PID 控制:A* 算法优化和硬件
Pub Date : 2024-02-21 DOI: 10.56028/aetr.9.1.723.2024
Chengzhi Zhou
 Intelligent autonomous mobile robots find diverse applications across various fields. This article delves into the optimization of path search planning and implementation for these robots in specific scenarios. The study enhances the traditional right-hand principle's search strategy, integrating a forward-looking approach grounded in the goal-oriented law with A* algorithm path planning. Emphasizing the algorithm's lightweight and high efficiency, the study also considers its interaction with hardware systems. The real-world application scenario is abstracted into a two-dimensional planar environment. Collaborative efforts between hardware and software systems result in a comprehensive robot system, validated through tests ensuring swift navigation from the starting point to the endpoint along the planned path.
智能自主移动机器人在各个领域都有不同的应用。本文深入探讨了这些机器人在特定场景下的路径搜索优化规划和实施。该研究改进了传统右手原理的搜索策略,将基于目标导向法则的前瞻性方法与 A* 算法路径规划相结合。研究强调了算法的轻量级和高效率,还考虑了算法与硬件系统的交互。现实世界的应用场景被抽象为一个二维平面环境。通过硬件和软件系统之间的协作,最终形成了一个综合的机器人系统,并通过测试进行了验证,确保沿着规划的路径从起点迅速导航到终点。
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引用次数: 0
Research on structural modulus inversion method of asphalt pavement based on BP neural networ 基于 BP 神经网络的沥青路面结构模量反演方法研究
Pub Date : 2024-02-21 DOI: 10.56028/aetr.9.1.708.2024
Ruimin Li
The current inversion methods based on pattern recognition method, database search method, genetic algorithm and other inversion methods are difficult to solve the absolute convergence problem of structural modulus inversion for asphalt pavements with more than three layers, while the deep learning models and methods widely used in the scenarios of image recognition, speech recognition, etc. as well as the ways to implement them have been increasingly improved, and they can be applied to solve the problem of structural modulus inversion for asphalt pavements. This study aims to solve the modulus inversion problem of multi-layer asphalt pavement structures, obtaining enough theoretical bending basin data of asphalt pavement structures as training samples through mechanical theory and programming calculations, and using the BP neural network model to train the prediction model of structural layer modulus inversion. The test results show that the BP neural network inverse asphalt pavement structural modulus model established in this paper can not only get the prediction results quickly and effectively, but also the prediction results have high accuracy, which provides an effective way for solving the modulus inversion problem of asphalt pavement structure with more than three layers by using the BP neural network to solve the pain point and bottleneck problems in the industry.
目前基于模式识别法、数据库搜索法、遗传算法等反演方法难以解决三层以上沥青路面结构模量反演的绝对收敛问题,而广泛应用于图像识别、语音识别等场景的深度学习模型和方法及其实现途径日益完善,可应用于解决沥青路面结构模量反演问题。本研究旨在解决多层沥青路面结构模量反演问题,通过力学理论和程序计算获得足够的沥青路面结构理论弯盆数据作为训练样本,利用BP神经网络模型训练结构层模量反演预测模型。试验结果表明,本文建立的BP神经网络沥青路面结构模量反演模型不仅能快速有效地得到预测结果,而且预测结果具有较高的准确性,为利用BP神经网络解决三层以上沥青路面结构模量反演问题提供了有效途径,解决了行业的痛点和瓶颈问题。
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引用次数: 0
Analysis and Evaluation of Species Invasion 物种入侵分析与评估
Pub Date : 2024-02-21 DOI: 10.56028/aetr.9.1.687.2024
Yihan Chen, Tianqing Du, Qi Zhang, Ning Zhang
Invasive species, like dandelions, threaten biodiversity and bring economic and ecological risks. It is important to evaluate whether they are beneficial and their interactions with local species. This article stimulates the occurrence of invasion, evaluates the influencing factors of three species, and finally provides their invasive ranking. We used the Vensim model to dynamically simulate the intrusion process and supplemented it with an Agent Based Model (ABS). Under all other conditions, we found that for every 10% increase in birth rate, the number of dandelions increases by nearly 20%. We construct an Analytical Hierarchy Process (AHP) model to calculate the impact factor for different species. Our models have passed sensitivity tests. The model deepens our understanding of the dynamic process of species invasion and provides a theoretical framework for the identification and control of invasive species. In the future we will improve the models by collecting more comprehensive meteorological data to demonstrate the impact of seasons on seeding processes and try to displace number of Google search results to surveys on ecology experts to promote the scientific basis of our impact factor.
蒲公英等入侵物种威胁着生物多样性,并带来经济和生态风险。评估它们是否有益以及它们与当地物种的相互作用非常重要。本文探讨了入侵的发生,评估了三种物种的影响因素,最后给出了它们的入侵等级。我们使用 Vensim 模型动态模拟入侵过程,并辅以基于代理的模型(ABS)。在所有其他条件下,我们发现出生率每增加 10%,蒲公英的数量就会增加近 20%。我们构建了一个层次分析法(AHP)模型来计算不同物种的影响因子。我们的模型通过了灵敏度测试。该模型加深了我们对物种入侵动态过程的理解,为识别和控制入侵物种提供了一个理论框架。未来,我们将通过收集更全面的气象数据来改进模型,以证明季节对播种过程的影响,并尝试将谷歌搜索结果的数量替换为对生态学专家的调查,以促进我们影响因子的科学性。
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引用次数: 0
Taking Dandelion as an Example: Exploring a Comprehensive Prediction and Evaluation Model for Invasive Species 以蒲公英为例:探索入侵物种综合预测和评估模型
Pub Date : 2024-02-21 DOI: 10.56028/aetr.9.1.677.2024
Zixin Wang, Shaoyu Li, Yuqiao Song, Jinhao Yao
With the rapid growth of global trade and tourism, the phenomenon of species invasion is becoming increasingly serious. Invasive species often have a significant impact on native ecosystems, disrupting ecological balance and threatening biodiversity. Therefore, it is essential to conduct in-depth research on invasive species. Dandelion, due to its strong reproductive ability, is considered a common invasive plant, but its application value in medicine, food, and ornamental uses cannot be ignored. Therefore, this article aims to establish a mathematical model to explore the relationship between invasive species and human activities and take Dandelion as an example to establish a comprehensive prediction and evaluation model for detailed analysis.
随着全球贸易和旅游业的迅速发展,物种入侵现象日益严重。入侵物种往往会对本地生态系统产生重大影响,破坏生态平衡,威胁生物多样性。因此,对入侵物种进行深入研究十分必要。蒲公英由于繁殖能力强,被认为是一种常见的入侵植物,但其在医药、食用、观赏等方面的应用价值也不容忽视。因此,本文旨在建立一个数学模型,探讨入侵物种与人类活动之间的关系,并以蒲公英为例,建立一个综合预测和评估模型,进行详细分析。
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引用次数: 0
Study On The Improvement Of Precise Transfer Process For Critically Ill Neonates 关于改进重症新生儿精确转运流程的研究
Pub Date : 2024-02-19 DOI: 10.56028/aetr.9.1.841.2024
Xin Wang, Chaoxue Guo, Zhiyi Li, Yuchi Liu, Linlin Wang, Yuxian Gao
Objective To improve the nursing strategy of critically ill neonatal transport and provide guidance for neonatal transport nursing through the study of critically ill neonatal transport. Methods From January 2020 to July 2023, according to the specific requirements and management regulations of epidemic prevention and control, our hospital established a strict and standardized transport plan, carried out transport tasks for 472 newborns who met the transport indications, and organization and management in the transport process; full security protection policy ;the improvement of transport quality and psychological support of family members were studied and analyzed. Results All 472 neonates arrived at the transport hospital safely, their condition did not worsen, their vital signs were stable, and the accompanying medical personnel and drivers did not have infection symptoms. Conclusion This study concluded that in the process of critically ill neonatal transport, the corresponding quality improvement was made in all aspects, which significantly improved the safety of transport during the epidemic period, met the needs of primary hospitals, ensured the life treatment of critically ill children, and maintained the integrity of the medical system.
摘要] 目的 通过对危重新生儿转运的研究,完善危重新生儿转运的护理策略,为新生儿转运护理提供指导。方法 2020年1月-2023年7月,根据疫情防控的具体要求和管理规定,我院制定了严格规范的转运方案,对符合转运指征的472例新生儿执行转运任务,并对转运过程中的组织管理、全程安全保护政策、转运质量的提高、家属的心理支持等方面进行研究分析。结果 472 名新生儿均安全到达转运医院,病情无恶化,生命体征平稳,随车医护人员和司机无感染症状。结论 本研究认为,在危重新生儿转运过程中,各方面都进行了相应的质量改进,大大提高了疫情期间的转运安全,满足了基层医院的需求,保证了危重患儿的生命救治,维护了医疗体系的完整性。
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引用次数: 0
Research on the application of big data mining technology based on neural network 基于神经网络的大数据挖掘技术应用研究
Pub Date : 2024-02-19 DOI: 10.56028/aetr.9.1.770.2024
Xiangchao Wang
In the development of social construction, all walks of life have the application of data mining technology, with the continuous development of science and technology, data mining technology can not only use the hidden law to solve the problem of time, but also can grasp more valuable data in the increasingly competitive social environment. Originally, after understanding the application research status of big data mining technology, based on the application of big data mining technology with neural network as the core, empirical analysis was carried out with Guanhealth big data intelligent analysis system as an example, in order to verify the unique value of data mining technology.
在社会建设发展中,各行各业都有数据挖掘技术的应用,随着科学技术的不断发展,数据挖掘技术不仅可以利用隐藏规律解决时间问题,还可以在竞争日益激烈的社会环境中掌握更多有价值的数据。原来,在了解了大数据挖掘技术的应用研究现状后,基于以神经网络为核心的大数据挖掘技术的应用,以观和大数据智能分析系统为例进行了实证分析,以验证数据挖掘技术的独特价值。
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引用次数: 0
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Advances in Engineering Technology Research
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