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Analysis and Implementation of an Automatic Marking System for Single-choice Question Based on OpenCV 基于 OpenCV 的单选题自动阅卷系统的分析与实现
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.275.2023
Weiye Tao, Huaying Zhou, Hexian Wang, Maosheng Huang
Aiming at a common choice question answer card style, with the help of OpenCV open source library, a variety of image processing technologies were used to to realize the function of an automatic marking system for single-choice question.
针对常见的选择题答题卡样式,借助 OpenCV 开源库,利用多种图像处理技术实现了单选题自动阅卷系统的功能。
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引用次数: 0
Research on the Influencing Factors and Measurements of Freeze-thawing Resistance of Recycled Concrete 再生混凝土抗冻融性的影响因素及测量方法研究
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.248.2023
Shihai Xue, Li Ma, Baigong Li, Yifan Niu, Cai Wu
With the introduction of green building, solid waste utilization has become a key research focus in civil engineering. Recycled concrete technology plays a crucial role in the sustainable development of the concrete industry. However, its durability in cold regions remains a pressing challenge for engineers. This paper reviews domestic and international studies to summarize the performance and degradation mechanisms of recycled concrete under freeze-thaw cycles, focusing on four factors: recycled aggregate proportion, freeze-thaw cycle conditions, water-to-cement ratio, and admixtures. Evaluation systems for frost resistance of recycled concrete are also summarized. Finally, improvement measures for enhancing the frost resistance of recycled concrete are proposed, providing a theoretical basis for further research and engineering applications in this field.
随着绿色建筑的提出,固体废弃物利用已成为土木工程领域的研究重点。再生混凝土技术在混凝土行业的可持续发展中发挥着至关重要的作用。然而,它在寒冷地区的耐久性仍然是工程师们面临的一个紧迫挑战。本文回顾了国内外的相关研究,总结了再生混凝土在冻融循环条件下的性能和降解机理,重点分析了再生骨料配比、冻融循环条件、水灰比和外加剂四个因素。此外,还总结了再生混凝土抗冻性的评价体系。最后,提出了提高再生混凝土抗冻性的改进措施,为该领域的进一步研究和工程应用提供了理论依据。
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引用次数: 0
Analysis of Legal Application Issues on Violations of Epidemic Prevention Regulations by Animal Waterway Carriers Entering Hainan 进入海南的水路动物运输船违反《防疫条例》的法律适用问题分析
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.270.2023
Yuhuan Lin, Jingshan Lin, Jinhua Pang
Water transportation is the primary means of transporting animals across provinces. In the management of animal health supervision, carrier identification often only extends to the transport vehicle, with limited attention paid to waterway carriers. This paper analyzed the legal application issues surrounding violations of epidemic prevention regulations by animal waterway carriers entering Hainan, based on relevant laws and regulations. The aim is to provide insights for the prevention and control of animal epidemic transmission in the construction of the Hainan Free Trade Port.
水路运输是跨省运输动物的主要方式。在动物卫生监督的管理中,对承运人的认定往往只停留在运输车辆上,对水路承运人的关注有限。本文以相关法律法规为依据,分析了进入海南的动物水路运输承运人违反防疫规定的法律适用问题。旨在为海南自由贸易港建设中的动物疫病传播防控工作提供启示。
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引用次数: 0
Effect of pulse injection on proppant distribution in fracture 脉冲注入对支撑剂在裂缝中分布的影响
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.221.2023
Zhifeng Bai, Mingzhong Li
The trend of changes in proppant concentration and fracture conductivity is essentially identical. When combined with an analysis of the average conductivity of effectively propped fractures at different locations, it becomes evident that the proppant distribution pattern becomes uneven after pulse injection. However, this pattern displays a discontinuous distribution law on the macro level. Influenced by the proppant distribution pattern, fracture conductivity exhibits significant variation at different locations. During the conventional injection process, the conductivity of fractures near the wellbore gradually decreases from proximity to distance. Conversely, the proppant phase distribution during pulse injection induces fluctuation in fracture conductivity, transitioning from proximity to distance.
支撑剂浓度和裂缝电导率的变化趋势基本一致。结合对不同位置有效支撑裂缝平均电导率的分析,可以明显看出,脉冲注入后支撑剂的分布模式变得不均匀。然而,这种分布模式在宏观上呈现出不连续的分布规律。受支撑剂分布模式的影响,不同位置的裂缝电导率表现出明显的差异。在常规注入过程中,井筒附近裂缝的电导率由近及远逐渐降低。相反,在脉冲注入过程中,支撑剂相的分布会引起裂缝电导率的波动,由近及远。
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引用次数: 0
A Human Health System Based on Raspberry Pi and Deep Learning Models 基于树莓派和深度学习模型的人体健康系统
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.197.2023
Xingyu Zhao, Wangxin Wu, Zheng Jian
This design uses Raspberry Pi to control the sensors to measure physiological indicators, avoiding the measurement results to be affected by subjective factors. This system design chooses to use a simple sensor, the overall system in the hardware design and production is simple and easy to implement, with low cost, low power consumption, easy to operate and other advantages. This Raspberry Pi based human health monitoring system can basically realise the human body temperature, heart rate and blood oxygen saturation monitoring, and when the above health data exceeds the human body health standard value, it will carry on the alarm reminder. At the same time, the health information can be transmitted to the computer of relatives and family doctors through the network data, so that when the health data is abnormal, you can get the help of relatives and family doctors. Deep learning algorithms can also be used to predict human health trends and identify potential health problems.
本设计采用树莓派(Raspberry Pi)控制传感器测量生理指标,避免测量结果受主观因素影响。本系统设计选择使用简单的传感器,整体系统在硬件设计和制作上简单易行,具有成本低、功耗低、操作方便等优点。这套基于 Raspberry Pi 的人体健康监测系统可以基本实现对人体体温、心率和血氧饱和度的监测,当上述健康数据超出人体健康标准值时,就会进行报警提醒。同时,健康信息可以通过网络数据传输到亲属和家庭医生的电脑上,当健康数据出现异常时,可以得到亲属和家庭医生的帮助。深度学习算法还可用于预测人体健康趋势,发现潜在的健康问题。
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引用次数: 0
Development of Fiber Sensors integrated with Aerospace Composites for Structure Health Monitoring 开发与航空航天复合材料集成的纤维传感器,用于结构健康监测
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.242.2023
Wenjuan Wang, Mengjie Zhang, Jingfeng Xue
The wide-spread use of composite material in aircraft across the world is expected to create a big need to improve structure health monitoring (SHM). Optical fiber sensors offer more advantages than conventional sensors, such as light weight, small size, immune to electromagnetic interference, easily embedded in composites. Extensive applications have been reported with a few embedded technology details by Boeing and Airbus, etc. In this paper, The methods of improved optical fiber surface-bonded composites by glass cloth and epoxy resin, as well as optical fiber embedded in composites were researched. The installation of fiber and composites, composites assembly pressure adaptability on FBG sensors, influences on structure properties of composite materials due to different fiber diameters and different numbers of optical fibers by the way of microscopic interface analysis and C-san were studied. The adequate fiber embedded technology was found to obtain the most feasibility of SHM. Light intensity and wavelength of FBG sensor surface-bonded by glass cloth are affected by the structural assembly pressure. It can be seen that diameter of embedded optical fiber equal to the thickness of prepreg monolaye, the fiber embedded next to 0 degree layer, less than five fibers within a 25mm width composite unit have little impact on composite structure. Then, 12 FBG sensors were embedded in a typical aircraft structure, a carbon fiber enhanced stiffened composite plate with length 600 mm and width 600 mm, to detect position and energy of external impact load by a mathematical analysis method, cross correlation algorithm. Finally, suggestions on future study are listed from four aspects, co-forming technology of FBG sensor and composite skin, research on the extraction technology of optical fiber, new flexible wing testing technology and advanced fiber optical sensing technology.
随着复合材料在全球飞机上的广泛应用,预计将产生改进结构健康监测(SHM)的巨大需求。与传统传感器相比,光纤传感器具有重量轻、体积小、抗电磁干扰、易于嵌入复合材料等优点。波音公司和空中客车公司等已经报道了广泛的应用,并提供了一些嵌入式技术细节。本文研究了用玻璃布和环氧树脂改良光纤表面粘合复合材料的方法,以及光纤嵌入复合材料的方法。通过微观界面分析和 C-san 方法,研究了光纤与复合材料的安装、复合材料装配压力对 FBG 传感器的适应性、不同纤维直径和不同光纤数量对复合材料结构性能的影响。结果表明,采用适当的光纤嵌入技术可获得最大的 SHM 可行性。玻璃布表面粘接的 FBG 传感器的光强和波长受结构装配压力的影响。可以看出,嵌入光纤的直径等于预浸料单层的厚度,光纤嵌入在 0 度层旁边,在 25mm 宽度的复合材料单元内嵌入少于 5 根光纤对复合材料结构的影响很小。然后,在长 600 毫米、宽 600 毫米的碳纤维增强加劲复合板这一典型飞机结构中嵌入了 12 个 FBG 传感器,通过交叉相关算法这一数学分析方法来检测外部冲击载荷的位置和能量。最后,从 FBG 传感器与复合材料蒙皮共成型技术、光纤提取技术研究、新型柔性机翼测试技术和先进光纤传感技术四个方面提出了今后的研究建议。
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引用次数: 0
Study on evaluation indexes of the full width deformable barrier test 全宽度可变形屏障试验的评价指标研究
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.225.2023
Jialin Yang, Bin Zhang
In order to evaluate the crash compatibility of vehicles, the full width deformable barrier is introduced into the vehicle crash test. Real car to car frontal collision is better simulated by installing deformable barrier on the load-cell wall . By the load-cell wall data, the values and distribution of vehicle frontal collision loads can be further obtained. Based on this, the full width deformable barrier tests are conducted for different structural sedans and SUV. The height index, homology index, horizontal structure interaction index(HSI), vertical structure interaction index(VSI), and minimum load-cell index are analyzed and compared. The results indicate that there is uncertainty when calculating the homology index RH and the evaluation indexes proposed by FIMCAR repeat the first step of VSI and HSI. Therefore, the height index, VSI, and HSI indexes are selected as effective indexes for evaluating the compatibility of the full width deformable barrier test.
为了评估车辆的碰撞兼容性,在车辆碰撞试验中引入了全宽可变形护栏。通过在荷重传感器壁上安装可变形壁障,可以更好地模拟真实的汽车与汽车正面碰撞。通过称重传感器壁的数据,可以进一步获得汽车正面碰撞载荷的值和分布。在此基础上,对不同结构的轿车和越野车进行了全宽可变形壁障试验。对高度指数、同源性指数、水平结构相互作用指数(HSI)、垂直结构相互作用指数(VSI)和最小荷载单元指数进行了分析和比较。结果表明,在计算同源性指数 RH 时存在不确定性,而 FIMCAR 提出的评价指标重复了 VSI 和 HSI 的第一步。因此,高度指数、VSI 和 HSI 指数被选为评价全宽可变形阻隔层试验兼容性的有效指数。
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引用次数: 0
Reliability Analysis on electric propulsion System Combining GO-FLOW Methodology with Multi-Valued Decision Diagrams 结合 GO-FLOW 方法和多值决策图对电力推进系统进行可靠性分析
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.253.2023
Xiaoxi Yang, Jingkui Li, Xiaona Liu
The electric propulsion system of an electric aircraft is the core power of the whole aircraft, which provides assurance for the safe flight of the aircraft. There are multiple stages in the flight process of electric aircraft, as well as different failure behaviors of system components at different stages. The electric motor system is a k-out-of-n system. Therefore, it is not possible to accurately describe the electric motor system with the existing operators when using the GO-FLOW method for electric propulsion system reliability calculations. In order to solve this problem, this paper models the electric motor system using the multi-valued decision diagram method (MDD method), based on which a new operator 43 is proposed to simulate the electric motor system, and then builds the GO-FLOW model and calculates the overall reliability based on the distributed electric propulsion system schematic. The example results show that the method can calculate the reliability of the distributed electric propulsion system more realistically.
电动飞机的电力推进系统是整架飞机的核心动力,为飞机的安全飞行提供保障。电动飞机的飞行过程有多个阶段,不同阶段的系统部件也有不同的故障表现。电机系统是一个 k-out-of-n 系统。因此,在使用 GO-FLOW 方法进行电力推进系统可靠性计算时,现有算子无法准确描述电机系统。为了解决这个问题,本文采用多值决策图法(MDD 法)对电机系统进行建模,在此基础上提出了一种新的算子 43 来模拟电机系统,然后根据分布式电力推进系统原理图建立 GO-FLOW 模型并计算整体可靠性。实例结果表明,该方法能更真实地计算分布式电力推进系统的可靠性。
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引用次数: 0
Corrosion risk of SO2 on silver plating of electric components 二氧化硫对电子元件镀银的腐蚀风险
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.203.2023
Mengmeng Zhuang, Jiayu Wang, Jiawei Zhao, Kaixu Ren, Xin Wang, Peng Liu
With the miniaturization and high integration of electronic devices, the reliability of the devices will be seriously reduced by the small corrosion of silver plating. As common corrosion pollutants, SO2 have strong corrosion sensitivity to silver. Using the G1 limit in ANSI/ISA 71.04 as the baseline,hour-by-hour SO2 concentration data for 210 cities show that the SO2 ranges from 1-993μg/m3, with an average of 20.80% of days ratio and 8.04% of hours ratio exceeding G1 level requirements, indicate a momentary high corrosion risk in the actual running environment. For silver plating, the corrosion risk of independent parameters conforms to the law of power function. Under the comprehensive influence of multiple factors, the corrosion thresholds of some parameters will decrease and the corrosion risk of electronic devices in service will increase.
随着电子设备的微型化和高度集成化,镀银层的微小腐蚀将严重降低设备的可靠性。二氧化硫作为常见的腐蚀污染物,对银具有很强的腐蚀敏感性。以 ANSI/ISA 71.04 中的 G1 限值为基准,210 个城市的逐小时 SO2 浓度数据显示,SO2 的范围在 1-993μg/m3 之间,平均有 20.80% 的天数比和 8.04% 的小时数比超过 G1 级别要求,表明实际运行环境中存在瞬间高腐蚀风险。对于镀银而言,独立参数的腐蚀风险符合幂函数规律。在多种因素的综合影响下,部分参数的腐蚀阈值会降低,服役电子设备的腐蚀风险会增加。
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引用次数: 0
BGSSN: Breast Cancer-Associated Genes Prediction Based on Weighted Sample-Specific Networks of Cancer Subtypes BGSSN:基于癌症亚型加权样本特异性网络的乳腺癌相关基因预测
Pub Date : 2023-10-07 DOI: 10.56028/aetr.8.1.280.2023
Qian Liu, Yuanyuan Zhang, Haoyu Zheng, Shudong Wang
Breast cancer exhibits a notable degree of heterogeneity in its occurrence and progression, encompassing diverse clinical patterns and outcomes among patients even with identical clinical pathological stages. Genetic mutations in different subtypes of breast cancer may lead to different types of disease and have different clinical implications. Therefore, molecular typing based on the characteristics of breast cancer heterogeneity and the screening of associated genes for different subtypes of breast cancer may be able to more accurately determine the pathogenic genes of breast cancer. In this paper, we propose a weighted sample-specific network based on breast cancer subtypes to predict associated genes, named BGSSN. To better reflect the individual characteristics of patients and the importance of patient samples in different subtypes, the weight of samples is added when constructing the sample-specific network. The random walk with restart method is then utilized to predict new breast cancer-associated genes within the constructed network. By leveraging this method, the network structure can be effectively explored to identify potential gene candidates.
乳腺癌的发生和发展具有明显的异质性,即使临床病理分期相同,患者的临床模式和预后也各不相同。不同亚型乳腺癌的基因突变可能导致不同类型的疾病,并产生不同的临床影响。因此,根据乳腺癌异质性的特点进行分子分型,筛选不同亚型乳腺癌的相关基因,或许能更准确地确定乳腺癌的致病基因。本文提出了一种基于乳腺癌亚型的加权样本特异性网络来预测相关基因,命名为 BGSSN。为了更好地反映患者的个体特征和患者样本在不同亚型中的重要性,在构建样本特异性网络时增加了样本的权重。然后,利用带重启的随机游走法预测所构建网络中的新乳腺癌相关基因。利用这种方法,可以有效地探索网络结构,找出潜在的候选基因。
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引用次数: 0
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Advances in Engineering Technology Research
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