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A study of swirl flow measurements in a cylinder under an intake flow similar to an engine operating condition using a rotating slit disk valve 使用旋转狭缝盘阀测量与发动机工作状态类似的进气流条件下气缸内的漩涡流量研究
Q4 Engineering Pub Date : 2024-03-18 DOI: 10.59018/012420
A new swirl measurement system was developed by installing bevel gears and a slit rotary valve into an impulse- type swirl measurement system of the type traditionally used to measure the swirl ratio and flow coefficient of engine intake ports. When operating this new swirl measurement system, it was confirmed that the characteristics of the intake air flow rate to the cylinders were similar to those of a typical operating engine condition. When the valve lift was limited to the cam angle range of 160 to 200 (the valve lift is maximized at a cam angle of 180°), the flow coefficient Cf increased as the cam angle increased under a constant camshaft rotation speed. Moreover, as the rotation speed of the camshaft increased, the Cf value decreased slightly. The swirl ratio NR in the cam angle range of 160 to 200 showed a nearly constant value with an increase of the cam angle at a constant camshaft rotation speed. There were also no significant changes in Cf with an increase in the camshaft rotation speed. NR measurement results while changing the camshaft rotation speed cannot be obtained by the traditional impulse swirl measurement method. NR measurement results with the new swirl measurement system can be used as basic data when calculating spray dispersion characteristics considering the engine rotation speed.
通过在传统用于测量发动机进气口漩涡比和流量系数的脉冲式漩涡测量系统中安装锥齿轮和狭缝旋转阀,开发了一种新的漩涡测量系统。在操作这种新的漩涡测量系统时,可以确认进入气缸的进气流速特征与典型的发动机工作状态相似。当气门升程限制在凸轮角 160 到 200 的范围内时(凸轮角 180°时气门升程最大),在凸轮轴转速不变的情况下,流量系数 Cf 随着凸轮角的增大而增大。此外,随着凸轮轴转速的增加,Cf 值略有下降。在凸轮轴转速不变的情况下,凸轮角度在 160 到 200 之间时,漩涡比 NR 的值随着凸轮角度的增大几乎保持不变。随着凸轮轴转速的增加,Cf 也没有明显变化。传统的脉冲漩涡测量方法无法获得改变凸轮轴转速时的 NR 测量结果。在考虑发动机转速的情况下计算喷雾分散特性时,可将新漩涡测量系统的 NR 测量结果用作基本数据。
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引用次数: 0
Improving quality and efficiency: A Six Sigma approach to problem solving in the sewing unit of a garments manufacturer based in Pakistan 提高质量和效率:在巴基斯坦一家服装制造商的缝纫部门采用六西格玛方法解决问题
Q4 Engineering Pub Date : 2024-03-18 DOI: 10.59018/012421
Garment sectors are a core component of Pakistan's industries. The escalating issues of productivity and quality, coupled with rising operational costs and time constraints, have had a significant adverse impact on garment manufacturing firms. Therefore, this research was conducted within a well-recognized garment industry in Karachi, Pakistan. The DMAIC approach of Six Sigma was chosen for this study to provide a structured framework for the identification, quantification, and elimination of sources of variation in operational procedures. Additionally, it focused on the optimization and improvement of operational variables, along with ensuring performance sustainability through the integration of multiple lean techniques. In conclusion, the results indicate a notable reduction in defect rates, enhanced cost-effectiveness, improved quality, reduced production time, and increased productivity following the implementation of problem-solving practices in the sewing (production) section. The study also highlights the evident relationship among the mentioned constraints.
服装行业是巴基斯坦工业的核心组成部分。生产率和质量问题不断升级,加上运营成本上升和时间限制,对服装制造企业产生了严重的不利影响。因此,本研究在巴基斯坦卡拉奇一家知名服装行业内进行。本研究选择了六西格玛的 DMAIC 方法,为识别、量化和消除操作流程中的变异源提供了一个结构化框架。此外,它还侧重于优化和改进操作变量,并通过整合多种精益技术确保绩效的可持续性。总之,研究结果表明,在缝纫(生产)部门实施问题解决方法后,缺陷率明显降低,成本效益提高,质量改善,生产时间缩短,生产率提高。研究还强调了上述制约因素之间的明显关系。
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引用次数: 0
Design and fabrication of circular sheet metal shearing machine 设计和制造圆形金属板剪切机
Q4 Engineering Pub Date : 2024-03-18 DOI: 10.59018/012417
The growing use of sheet metal in various industries such as automotive, packaging, medical appliances, cylinder production, Apparatus construction, Tank construction, Aircraft bodies, Missile production, Satellite dishes, road building and road signs, and household appliances, is attributed to its ease of manufacturing, handling, and use. To meet customer demands, sheet metal product manufacturing industries are working towards producing circular feature products of good quality at a large scale and low cost. To this end, this research emphasis the design, analysis, and fabrication of an electric circular sheet metal shearing machine, this would replace the punching and blanking operations and reduce scrap value from the stock material. The research includes concept design, detail design and analysis, assembly, 3D modelling, and fabrication of the Machine.
钣金之所以在汽车、包装、医疗器械、气缸生产、仪器制造、坦克制造、飞机机身、导弹生产、卫星天线、道路建设和路标以及家用电器等各行各业的应用越来越广泛,是因为它易于制造、处理和使用。为了满足客户的需求,钣金产品制造业正努力生产出质量好、规模大、成本低的圆形特色产品。为此,本研究强调设计、分析和制造一种电动圆形金属板材剪切机,它将取代冲孔和冲裁操作,并减少库存材料的废料价值。研究包括概念设计、详细设计和分析、组装、三维建模和机器制造。
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引用次数: 0
Integration of dispersed renewable energy generating in power distribution network 将分散的可再生能源发电纳入配电网络
Q4 Engineering Pub Date : 2024-03-18 DOI: 10.59018/012422
As traditional sources of energy recede and demand for energy rises at an unprecedented pace, it is difficult for the available sources to satisfy demands. As a result, this research focuses on combining conventional generation with distributed generation, each of which can be used independently. For both industrial and residential electricity suppliers, providing a secure, continuous, and safe electrical supply is a critical necessity. As we progress toward a more sustainable approach to generating electricity (both renewable and nuclear) from the currently prevalent non-renewable sources, a hybrid supply system is an intermediate phase. This project aims to simulate a three-phase power plant that incorporates a conventional steam turbine and a DC-AC inverter generation device powered by solar to produce a total of 100kW of power with a power factor of 1. The input torque to the synchronous generator and the DC voltage to the distributed system vary depending on the output power potential of each system. Both devices achieve a constant voltage at the load. When the two systems work independently, the voltages produced by both are in phase and have the same amplitude.
随着传统能源的衰退和能源需求的空前增长,现有能源很难满足需求。因此,这项研究的重点是将传统发电与分布式发电结合起来,每种发电方式都可以独立使用。对于工业和居民用电供应商来说,提供安全、持续和可靠的电力供应是至关重要的。随着我们从目前普遍使用的不可再生资源向更可持续的发电方式(包括可再生能源和核能发电)迈进,混合供电系统是一个中间阶段。本项目旨在模拟一个三相发电厂,该发电厂包含一个传统的蒸汽轮机和一个由太阳能供电的直流-交流逆变发电装置,总功率为 100 千瓦,功率因数为 1。两个设备都能在负载上实现恒定电压。当两个系统独立工作时,两者产生的电压相位相同,幅值相同。
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引用次数: 0
Effect of traffic speed on noise generated by vehicles motorized in front of the Karya Bhakti Pratiwi Dramaga Bogor hospital 车速对茂物 Karya Bhakti Pratiwi Dramaga 医院前机动车产生的噪音的影响
Q4 Engineering Pub Date : 2024-03-18 DOI: 10.59018/012423
Noise is one of the environmental health problems in big cities. The 1988 WHO report as submitted by the Indonesian Health Service (1995), states that 8% - 12% of the world's population has suffered from the effects of noise. The activity of residents of the city of Bogor a suburb of the capital city of Jakarta in Indonesia is relatively high. Along with the economic development in the city of Bogor, the number of motorized vehicles operating both private and public vehicles has also increased. The purpose of this study was to determine the average speed of motorized vehicles that pass through the Dramaga highway, especially in front of the Karya Baki Pratiwi Hospital, and also to determine the level of noise generated due to the speed of motorized vehicles. The method used in this study is a quantitative method by calculating the number of vehicles and the average speed of vehicles and data analysis. The data taken is vehicle speed data every 15 minutes and noise levels using a Sound Level Meter (SLM). In this study, three SLMs were used which would be placed at three points. The results showed that the speed of the vehicle affects the noise level which is quite significant. The results of data analysis show that the effect of speed on noise is 24%, where the equation is as follows, y=69.505 – 0.395x1 +0, 148x2 + 0.535x3. This equation means that if there is no decrease in motorcycle speed, light vehicle speed, and heavy vehicle speed, the noise level in SLM1 is 69.505 dBA. However, if there is an increase in the number of light vehicles by 0.148, a decrease in the number of motorcycles and large vehicles is obtained by 0.14, the noise level will increase by 0.395 dBA.
噪音是大城市的环境健康问题之一。印度尼西亚卫生局提交的 1988 年世界卫生组织报告(1995 年)指出,全世界有 8%-12%的人口受到噪音的影响。茂物市是印度尼西亚首都雅加达的郊区,该市居民的活动量相对较大。随着茂物市经济的发展,私人和公共机动车辆的数量也在增加。本研究的目的是确定通过 Dramaga 高速公路,特别是 Karya Baki Pratiwi 医院前的机动车辆的平均速度,同时确定机动车辆的速度所产生的噪音水平。本研究采用的方法是定量方法,即计算车辆数量和平均车速并进行数据分析。采集的数据是每 15 分钟的车速数据和使用声级计(SLM)的噪音水平。在这项研究中,使用了三个声级计,分别放置在三个点上。结果表明,车速对噪音水平的影响相当显著。数据分析结果显示,车速对噪音的影响为 24%,等式如下:y=69.505 - 0.395x1 +0, 148x2 + 0.535x3。 该等式表示,如果摩托车车速、轻型车车速和重型车车速没有降低,SLM1 的噪音水平为 69.505 dBA。不过,如果轻型车辆的数量增加 0.148 辆,摩托车和大型车辆的数量减少 0.14 辆,则噪音水平将增加 0.395 分贝。
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引用次数: 0
Performance test of a diesel engine using transesterified soybean oil mixed with diesel fuel 使用混有柴油的酯交换大豆油的柴油发动机性能测试
Q4 Engineering Pub Date : 2024-03-18 DOI: 10.59018/012418
The study focused on the feasibility of soybean oil to use as a biofuel. This study presented the viability of soybean oil in terms of density, flashpoint, sulfur, heating value, specific fuel consumption, and ash content. It also showed the performance result when tested on a diesel engine in terms of fuel consumption, revolution per minute, the temperature at the exhaust pipe, cylinder head, engine block, brake power, and brake thermal efficiency. Soybean oil undergoes the process of transesterification to be used as a biofuel. It was mixed with commercially available diesel fuel upon testing in the diesel engine. The mixture contained 90% diesel fuel and 10% transesterified soybean oil. After testing, the performance of the diesel engine was measured. Transesterified soybean oil was feasible to use as a fuel according to the testing conducted. However, some improvements must have been made to increase the brake thermal efficiency. Evaluating different mixtures for diesel fuel and transesterified soybean oil must also be considered to get more efficient data. It is recommended to include emission testing for future studies.
研究重点是大豆油用作生物燃料的可行性。这项研究从密度、闪点、硫、热值、特定燃料消耗量和灰分含量等方面介绍了大豆油的可行性。研究还显示了在柴油发动机上进行测试时,在燃料消耗、每分钟转数、排气管温度、气缸盖温度、发动机缸体温度、制动功率和制动热效率等方面的性能结果。大豆油经过酯交换过程后可用作生物燃料。在柴油发动机中测试时,大豆油与市售柴油混合。混合物中含有 90% 的柴油和 10% 的酯交换大豆油。测试后,测量了柴油发动机的性能。根据测试结果,使用酯交换大豆油作为燃料是可行的。不过,必须进行一些改进,以提高制动热效率。还必须考虑评估柴油和酯化大豆油的不同混合物,以获得更有效的数据。建议在今后的研究中加入排放测试。
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引用次数: 0
An analysis of land surface temperature and land-use from sentinel satellite data 利用哨点卫星数据分析地表温度和土地利用情况
Q4 Engineering Pub Date : 2024-03-18 DOI: 10.59018/012419
Land surface temperature is a study of the heat on the earth’s surface; it can be recognized by contacting the surface from Thermal Infrared wavelength which can be the roof, the top of buildings, water, or ice. Therefore, land surface temperature and air temperature are not the same. This study aims to analyze land surface temperature and land-use from Sentinel-2 Satellite data. The procedure is divided into 3 main steps: 1) Using data from Sentinel-3 Satellite to analyze temperature by using The Supplemental Nutrition Assistance Program (SNAP) program, 2) Land-use classification by using data from Sentinel-2 Satellite in Supervised Classification in the form of Maximum Likelihood Classifier. This study has classified land-use into 4 types: water, forest, urban, and agriculture, 3) Accuracy assessment. The result found that the land surface temperature of urban areas has the highest average land surface temperature, followed by forest, agriculture, and water.
地表温度是对地球表面热量的研究;它可以通过热红外波长接触地表来识别,地表可以是屋顶、建筑物顶部、水或冰。因此,地表温度和空气温度并不相同。本研究旨在从哨兵-2 卫星数据中分析地表温度和土地利用情况。该过程分为 3 个主要步骤:1)利用补充营养援助计划(SNAP),使用哨兵-3 号卫星的数据分析温度;2)利用哨兵-2 号卫星的数据,以最大似然分类器的形式进行监督分类,从而进行土地利用分类。这项研究将土地利用分为 4 种类型:水域、森林、城市和农业。结果发现,城市地区的平均地表温度最高,其次是森林、农业和水域。
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引用次数: 0
Compositional kriging analysis: A spatial interpolation method for distributions 构成克里金分析:分布的空间插值方法
Q4 Engineering Pub Date : 2024-03-12 DOI: 10.59018/012412
Effective development of subsurface petroleum resources relies on the estimation of spatially distributed parameters at undrilled locations. Established geostatistical algorithms based on kriging exist for the estimation of scalar spatial variables such as porosity and permeability. This may not be suitable for the estimation of distributions of properties, such as grain size, whose whole distribution varies spatially. The current conventional approach is to fit a normal or log-normal distribution to the available data, and then to estimate the parameters of the distribution, the mean and standard deviation, spatially using kriging, taking care to consider any dependence between the mean and standard deviation. The assumption that all the grain size distributions can be approximated by a single distribution type is unsatisfactory, since datasets have very different-looking distributions, with variations in skewness, kurtosis, and modality. This paper presents an alternative approach that can handle significant variability in the distribution shape by separating the distribution into bins, like a histogram, and treating these bins as percentages in a composition. Compositional data needs to be mapped onto a simplex to overcome spurious correlations between those components, in addition, spatial estimation methods for compositional data have already been developed. However, the contribution to this field is the mapping of continuous data from distributions into a composition that enables the compositional kriging method to predict distributions at new locations. Moreover, the results showed the prediction distributions in the presence of varying modality, skewness, and kurtosis. Therefore, the grain size datasets in this paper have been working with the confidentiality restrictions so it explains the technique with a dataset of population ages from the US census 2010 for the state of Texas, which shows similar variability in distribution.
地下石油资源的有效开发有赖于对未钻探地点空间分布参数的估算。现有的基于克里格法的地质统计算法可用于估算标量空间变量,如孔隙度和渗透率。这种算法可能不适合估算粒度等整体分布随空间变化的属性分布。目前的传统方法是对现有数据拟合正态分布或对数正态分布,然后使用克里金法估算分布的空间参数、平均值和标准偏差,同时注意考虑平均值和标准偏差之间的任何依赖关系。所有粒度分布都可以用单一分布类型来近似的假设并不令人满意,因为数据集的分布在偏度、峰度和模态方面都存在差异。本文提出了一种可处理分布形状显著变化的替代方法,即像直方图一样将分布分成若干小块,并将这些小块视为组成中的百分比。组合数据需要映射到单纯形上,以克服这些成分之间的虚假相关性,此外,针对组合数据的空间估算方法也已经开发出来。然而,该领域的贡献在于将连续数据从分布映射到组成中,从而使组成克里金法能够预测新地点的分布。此外,研究结果显示,预测分布存在不同的模态、偏度和峰度。因此,本文中的粒度数据集在工作中受到了保密限制,所以本文用美国德克萨斯州 2010 年人口普查中的人口年龄数据集解释了这一技术,该数据集显示了类似的分布变化。
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引用次数: 0
Diabetes detection based on Fast Learning Network model 基于快速学习网络模型的糖尿病检测
Q4 Engineering Pub Date : 2024-03-12 DOI: 10.59018/012414
In the last decades, machine learning algorithms have witnessed a high significance in healthcare applications in terms of detecting various diseases. For instance, diabetic disease is considered one of the major health problems around the world. However, there is a need to deeply study a machine learning algorithm in the detection of diabetic disease. Therefore, this study presents a Fast Learning Network (FLN) algorithm in the detection of diabetic disease based on different numbers of hidden nodes. In this work, the Pima Indians Diabetes Database (PIDD) is used for training and testing the proposed FLN algorithm. Furthermore, the performance of the proposed model has been assessed in terms of several evaluation measurements such as accuracy, precision, recall, F-Measure, G-Mean, MCC, and specificity. The experimental results show that the highest achieved accuracy, recall, F-Measure, G-Mean, and MCC were 82.17%, 80.95%, 71.33%, 71.84%, and 59.54%, respectively. Meanwhile, the highest obtained results for precision and specificity were 67.50% and 83.12%, respectively. In addition, the performance of the proposed model has outperformed its comparative in terms of detection accuracy.
过去几十年来,机器学习算法在医疗保健应用中检测各种疾病方面发挥了重要作用。例如,糖尿病被认为是全球主要的健康问题之一。然而,有必要深入研究检测糖尿病疾病的机器学习算法。因此,本研究提出了一种基于不同隐藏节点数的快速学习网络(FLN)算法,用于检测糖尿病疾病。本研究使用皮马印第安人糖尿病数据库(PIDD)来训练和测试所提出的 FLN 算法。此外,还从准确度、精确度、召回率、F-Measure、G-Mean、MCC 和特异性等几个评估指标对所提出模型的性能进行了评估。实验结果表明,准确率、召回率、F-Measure、G-Mean 和 MCC 的最高值分别为 82.17%、80.95%、71.33%、71.84% 和 59.54%。同时,精确度和特异度的最高结果分别为 67.50% 和 83.12%。此外,在检测准确率方面,所提模型的表现也优于同类产品。
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引用次数: 0
The effect of traffic volume on the noise caused by motorized vehicles in front of Karya Bhakti Pratiwi Dramaga Hospital, Bogor 交通流量对茂物 Karya Bhakti Pratiwi Dramaga 医院前机动车辆噪音的影响
Q4 Engineering Pub Date : 2024-03-12 DOI: 10.59018/012413
Transportation is the movement or transfer of both people and goods from a place of origin to a destination. In this movement or movement, of course, using transportation facilities in the form of vehicles which in operation cause noises such as engine sound coming out through the muffler or horn. At a certain level, these sounds can still be tolerated in the sense that the consequences they cause are not a nuisance, but at a higher level, the sound generated by these vehicles is already a nuisance or pollution, which is called noise. The activity of the population of Bogor district a suburb of the capital city of Jakarta in Indonesia is relatively high. Along with economic development in the Bogor district, the number of motorized vehicles operating both private and public vehicles has also increased. The purpose of this study was to determine the average volume of motorized vehicles that pass through the Dramaga highway, especially in front of Karya Bhakti Pratiwi Hospital, and also to determine the level of noise generated due to the volume of motorized vehicles. The method used in this study is a quantitative method by calculating the number of vehicles and the average volume of vehicles and data analysis. The data taken is vehicle volume data every 15 minutes and noise levels using a Sound Level Meter (SLM). In this study, three SLMs were used which were placed at three points. The results showed that the volume of vehicles affects the noise level quite significantly. The results of data analysis show that the effect of volume on noise is 12.6%, where the equation is as follows, y = 72.898 - 0.003 x1 + 0.220x2 - 0.054x3. This equation means that if there is no decrease in motorcycle volume, light vehicle volume, and heavy vehicle volume, the noise level in SLM 1 is 72.898 dBA. However, if there is an increase in the number of light vehicles by 0.220, it is found that the number of motorcycles and heavy vehicles is decreased by 0.22, so the noise level will increase by 0.003 dBA.
运输是指人员和货物从起始地到目的地的移动或转移。在这种移动或转移过程中,当然要使用车辆形式的交通设施,这些车辆在运行过程中会产生噪音,如发动机通过消声器或喇叭发出的声音。在一定程度上,这些声音还可以被容忍,因为它们造成的后果并不是一种滋扰,但在更高的程度上,这些车辆产生的声音已经是一种滋扰或污染,这就是所谓的噪音。茂物区是印度尼西亚首都雅加达的郊区,人口活动量相对较大。随着茂物区经济的发展,私人和公共机动车辆的数量也在增加。本研究的目的是确定通过 Dramaga 高速公路(尤其是 Karya Bhakti Pratiwi 医院前)的机动车辆的平均数量,同时确定机动车辆数量产生的噪音水平。本研究采用的方法是定量方法,通过计算车辆数量和平均车流量并进行数据分析。采集的数据是每 15 分钟的车辆流量数据和使用声级计(SLM)测量的噪音水平。在这项研究中,使用了三个声级计,分别放置在三个点上。结果表明,车辆数量对噪音水平的影响相当大。数据分析结果显示,车流量对噪音的影响为 12.6%,等式如下:y = 72.898 - 0.003 x1 + 0.220x2 - 0.054x3。这个等式表示,如果摩托车、轻型车辆和重型车辆的数量没有减少,则 SLM 1 的噪音水平为 72.898 dBA。然而,如果轻型车辆的数量增加 0.220 辆,则摩托车和重型车辆的数量减少 0.22 辆,因此噪音水平将增加 0.003 分贝。
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引用次数: 0
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ARPN Journal of Engineering and Applied Sciences
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