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Numerical Analysis of the Effect of Piston Cooling Gallery Design on Heat Transfer in an Internal Combustion Engine 内燃机活塞冷却廊设计对传热影响的数值分析
Pub Date : 2019-03-20 DOI: 10.31695/ijerat.2019.3404
Refik Cevirme, O. Isin
Internal combustion engines are important machines that make human life easier. Internal combustion engines are developing day by day and higher power density engines are produced. Besides, strict standards of emission and fuel economy are forcing automotive manufacturers to produce environment-friendly engines. While manufacturers produce engines in accordance with these standards, they also do various studies in order not to reduce performance. One of the most important of these studies is the development of thermal management. Good cooling of internal combustion engine pistons, which are exposed to high pressures and temperatures during the combustion process, is an important consideration for the development of the thermal management. In this study; it is aimed to investigate the effect of design differences on piston cooling by using different designs for the cooling gallery located in the head region of an internal combustion engine piston. For this purpose, thermal analysis of an internal combustion engine piston was performed for different cooling gallery designs and the results of the analysis of each design were compared. In addition, the results of the analysis were compared with the heat transfer rates in the literature.
内燃机是使人类生活更容易的重要机器。内燃机的发展日新月异,大功率密度越来越高。此外,严格的排放和燃油经济性标准迫使汽车制造商生产环保型发动机。虽然制造商按照这些标准生产发动机,但为了不降低性能,他们也做了各种研究。其中最重要的研究之一是热管理的发展。内燃机活塞在燃烧过程中暴露在高压和高温下,如何对活塞进行良好的冷却是热管理技术发展的重要考虑因素。在本研究中;通过对内燃机活塞头部区域的冷却廊进行不同设计,研究不同设计对活塞冷却的影响。为此,对内燃机活塞进行了不同冷却廊设计的热分析,并对每种设计的分析结果进行了比较。此外,分析结果与文献中的传热率进行了比较。
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引用次数: 1
The Diversity of Arthropods at the Arabica Coffee Plantation in Atang Jungket Village, Aceh Tengah District, Indonesia 印度尼西亚亚齐腾加区Atang Jungket村阿拉比卡咖啡种植园节肢动物多样性
Pub Date : 2019-02-15 DOI: 10.31695/IJERAT.2019.3372
Hasnah, A. Rusdy, M. Sayuthi, Susanna, Auliani
This research was conducted on an Arabica coffee plantation that was organically managed in Atang Jungket Village, Aceh Tengah District, Aceh Province. Sampling using a purposive sampling method with the 5-hectare land area at altitude 1400 m above sea level. The results showed that arthropods found in arabica coffee plantations consist of 2 classes, 12 orders, and 72 families. The order of Hymenoptera was the dominant order (39.72%), followed by Diptera (34.72%), Araneae (9.46%), Coleoptera (8.06%) and other orders (Hemiptera, Blatodea, Homoptera, Lepidoptera, Mantodea, Mecoptera, Orthoptera and Psocoptera) that is 8.05%. The high abundance of arthropods in an agro-ecosystem is related to the stability of the environment, where the food chain is still well-established.
这项研究是在亚齐省亚齐腾加区Atang Jungket村有机管理的阿拉比卡咖啡种植园进行的。在海拔1400 m的5公顷土地面积上采用目的抽样方法。结果表明,阿拉比卡咖啡人工林节肢动物共有2纲12目72科。膜翅目为优势目(39.72%),其次为双翅目(34.72%)、蜘蛛目(9.46%)、鞘翅目(8.06%),其余半翅目、斑翅目、同翅目、鳞翅目、螳螂目、甲翅目、直翅目和鞘翅目(8.05%)。农业生态系统中节肢动物的高丰度与环境的稳定性有关,其中食物链仍然完善。
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引用次数: 1
Boarding House Preferences by Middle Up Class Students in Surabaya 泗水中上阶层学生的住宿偏好
Pub Date : 2019-02-15 DOI: 10.31695/IJERAT.2019.3379
Putra Jaya Pradana, P. Setijanti, D. Septanti
The growth of public universities and private universities in Surabaya causes many temporary residents with educational aims. This temporary resident certainly needs a temporary residence such as a boarding house. Boarding house investment offers passive income that is not small, especially the boarding house with middle up segmentation. However, the costs involved in developing a boarding house are very large, so it is necessary to study what the prospective customer prioritize in deciding the decision to choose a boarding house. Quantitative approaches are used in determining influential factors and determiningpreferences. The survey was conducted with respondents from 100 middle up class students.The results of this study indicate that the factors which influence the choice of boarding houses are security, price, location, facilities, environment, reputation, reference and service. Advertising factor is a factor that has no effect. Preference for boarding houses produced in general are some of them including CCTV boarding houses; low, tenuous and transparent fence model; the boarding house is located at a location less than 1 Km from the campus area and has a front road between 3-5 meters wide where 2 cars can pass intersection; daily cleaning staff; silent boarding house acoustic conditions; limited car parking; electronic TV and AC facilities; additional bathroom inside; Mattresses, study tables, chairs and wifi; communal living room and kitchen; minimalist design theme and room size 3x4 meters (12 m2); the surrounding environment is in the form of formal housing; absence of security services; service with water pumps and separated electricity systems.
泗水公立大学和私立大学的发展使得许多以教育为目的的临时居民。这个临时居民当然需要一个临时住所,比如寄宿公寓。公寓投资提供了不小的被动收益,尤其是中上细分的公寓。然而,开发寄宿公寓的成本非常高,因此有必要研究潜在客户在决定选择寄宿公寓时优先考虑什么。定量方法用于确定影响因素和确定偏好。该调查是在100名中上阶层学生中进行的。本研究结果显示,影响寄宿公寓选择的因素有:安全性、价格、地理位置、设施、环境、声誉、参考和服务。广告因素是一种没有效果的因素。一般产生的偏好寄宿楼有一些包括CCTV寄宿楼;低矮、纤细、透明的栅栏模型;公寓位于距离校园不到1公里的位置,有3-5米宽的前路,可以两辆车通过交叉口;日常保洁人员;静音公寓的声学条件;停车场有限;电子电视及空调设施;内部额外的浴室;床垫、学习桌椅和无线网络;公共客厅和厨房;极简的设计主题和房间大小3 × 4米(12平方米);周边环境为正规住房形式;缺乏安全服务;配有水泵和独立电力系统。
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引用次数: 2
A Derived Piston Configuration to Encourage the Transfer of Residual Gas Fraction to Unite Motor Execution 一种派生的活塞结构,以鼓励残余气体部分的转移,以统一电机的执行
Pub Date : 2019-01-10 DOI: 10.31695/IJERAT.2019.3369
Mohammad M. Al-Azzawi, MSc. Muayyad A.H Al-Hayali, MSc. Kousay N. Al-Ane
As motors have created consistently, pistons have progressed with them. They're getting shorter and lighter and use more diminutive skirts the round and hollow "body" of the pistons. More up and coming pistons are consistently made of aluminum compounds included more silicon than previously. This improves insurance from the warmth and diminishes warm advancement [1]. One of the best movements in piston advancement is the usage of different piston "crowns" the part that enters the consuming chamber and is presented to interior burning. While increasingly prepared piston tops were the generally social butterfly, various by and by incorporate dishes on top that incorporate diverse influence the consuming system. In this paper, it presents the distinctive state of piston head "Crown" that can clear up the remaining gas grating to begin choppiness to get a legitimate air-fuel proportion [2,3].
随着马达的不断发展,活塞也随之发展。它们变得越来越短,越来越轻,并使用更小的裙摆,而不是圆形和空心的活塞“身体”。越来越多的活塞一直由铝化合物制成,其中包括比以前更多的硅。这提高了温暖的保障,减少了温暖的推进[1]。活塞推进的最佳运动之一是使用不同的活塞“顶”部分进入消耗室,并提出内部燃烧。虽然越来越多的准备活塞顶部通常是交际花,但各种各样的菜肴在顶部融合了不同的影响消费系统。本文提出了活塞头“皇冠”的独特状态,可以清除剩余的气栅,开始起伏,从而获得合理的空燃比[2,3]。
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引用次数: 0
Enhancement of Radiation Safety in Industrial Cobalt -60 Irradiator During Abnormal Conditions 工业用钴-60辐照器在异常条件下的辐射安全性提高
Pub Date : 2019-01-01 DOI: 10.31695/ijerat.2019.3425
A. Khalifa, B KeshekA., Bassam W . Abou-Shousha
Enhancement of radiation safety in industrial cobalt -60 irradiator unit is a necessity need to protect working staff and the environment against radiation release by applying radiation safety standards inside and outside industrial during normal and abnormal operating conditions. This could be fulfilled by preventing stacking, falling, and probability broken cobalt-60 radiation capsules which could lead to water contamination inside the storage pool. The water of storage pool is contaminated by broken hot capsule where the radiation source is changed from close radiation source to very dangerous open radiation source. This paper presents a proposed modified design with concrete shielding maze having more than one right – angle bend to maintain radiation prohibitive and to determine the smallest radiation exposure rates at the entrance of maze design with several legs.
加强工业用钴-60辐照装置的辐射安全是保护工作人员和环境免受辐射释放的必要条件,在正常和异常操作条件下,在工业内外实施辐射安全标准。这可以通过防止堆积、掉落和可能导致储存池内水污染的钴-60辐射胶囊破裂来实现。由于辐射源由封闭辐射源转变为危险性较大的开放辐射源,储存池水被热胶囊破碎污染。本文提出了一种改进的混凝土屏蔽迷宫设计,该设计具有一个以上的直角弯道,以保持辐射禁止,并确定多腿迷宫设计入口处的最小辐射暴露率。
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引用次数: 0
Segmentation of Phonocardiograms Signal 心音图信号的分割
Pub Date : 2018-07-01 DOI: 10.31695/IJERAT.2018.3284
Jamuna Kaushik, Abhishek Misal
Heart sound is a kind of bio-sound, mainly through the media pass sound signals. The measures of the heart sound signals involved in acoustics, fluid mechanics research. when added some noise for selecting pure PCG signal by using adaptive white Gaussian noise. Than denoise the PCG signal by using Discrete Wavelet transform and decomposes a signal into a 4 level of basic functions. These basic functions are called Discrete wavelet transform (DWT), which transforms a discrete time signal to a discrete wavelet representation. Experiments are conducted on 23 different recordings of heart sound where experiment working on 2 normal signal and 19 Abnormal signals where working on the accuracy of the PCG signal that is depending on the training and testing data. Segmentation process based on Shannon entropy method for low amplitude and GSF is based on high amplitude. Toward this objective, after preprocessing the PCG signal, for feature extraction of the PCG signal fixed windows were moved on the preprocessed signal, and in each analysis window, two frequency-and amplitude-based features were calculated from the excerpted segment. In order to recognize the delineated PCG sounds, ?rst, S1 and S2 were detected. Then, a new DS was regenerated from the signal whose S1 and S2 were eliminated to detect occasional S3 and S4 sounds. Finally, probable murmurs and souf?es were spotted. The proposed algorithm was applied to 6 beat PCG. signals gathered from patients with different valve diseases. This feature Extraction of the PCG signal is use PCA for reducing 216 dimensions to 7 dimensions of the PCG signal. and the classifier is used SVM method which is found the normal and abnormal heart sound of the PCG signal.
心音是生物声的一种,主要通过介质传递声音信号。心音信号的测量涉及声学、流体力学的研究。采用自适应高斯白噪声选择纯PCG信号。然后利用离散小波变换对PCG信号进行降噪,并将信号分解为4级基本函数。这些基本函数被称为离散小波变换(DWT),它将离散时间信号转换为离散小波表示。实验对23个不同的心音记录进行了实验,其中实验对2个正常信号和19个异常信号进行了实验,其中对PCG信号的准确性进行了研究,这取决于训练和测试数据。基于Shannon熵法的低幅值分割和基于GSF的高幅值分割。为此,在对PCG信号进行预处理后,对PCG信号进行特征提取,在预处理后的信号上移动固定的窗口,在每个分析窗口中,从提取的片段中计算两个基于频率和幅度的特征。为了识别所描绘的PCG音,我们检测了?rst、S1和S2。然后,从去除S1和S2的信号中再生一个新的DS,以检测偶尔出现的S3和S4声音。最后,可能有杂音和鼻音?他被发现了。将该算法应用于6拍PCG。来自不同瓣膜疾病患者的信号。PCG信号的特征提取是利用PCA将216维的PCG信号降维为7维。分类器采用支持向量机方法对心音信号的正常和异常进行分类。
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引用次数: 1
Diurnal and Seasonal Variation of Surface Refractivity in Minna and Lapai, North Central Nigeria 尼日利亚中北部米纳和拉派地区地表折射率的日变化和季节变化
Pub Date : 2018-07-01 DOI: 10.31695/IJERAT.2018.3283
M. Tyabo, O. Oyedum, B. Musa, Muraina Nurudeen, Ibrahim Samue
Spatial and temporal variations of surface refractivity, Ns, in the troposphere are important parameters in designing terrestrial communication links. This research work examines the effect of variations of meteorological parameters on surface radio refractivity during dry and wet seasons in Minna and Lapai (2011-2013). The data on surface temperature, humidity and pressure collected from the Tropospheric Data Acquisition Network (TRODAN) weather stations installed at the Federal University of Technology, Minna, and at Ibrahim Badamasi Babangida University, Lapai, were used for the computation of radio refractivity. The hourly and monthly averages of radio refractivity during dry and wet seasons were calculated. The results showed that surface refractivity varied diurnally and seasonally in both stations. Refractivity values were high during the early morning and night hours and decreased rapidly during the afternoon hours. Values of refractivity were also generally low during the dry season months and high during the wet season months. It was also observed that refractivity values were higher at Lapai than Minna in dry season months. The result also shows that diurnal refractivity variation is attributed to atmospheric phenomena while seasonal variation is caused by the climatic conditions of the regions. Maximum values of 350 N-units in August in 2011, 343 N-units in July in 2012 and 347 N-units in August in 2013, while the minimum values of 275 N-units in January in 2011, 278 N-units in March in 2012 and 273 N-units were recorded in February for Minna. Surface refractivity has maximum values of 350 N-Units in August (2011), 347 N-Units in August (2012) and 349 N-Units in September (2013), while minimum values of 289 N-Units, 290 N-Units and 297 N-Units occurred in January in 2011, 2012 and 2013 respectively for Lapai.
对流层表面折射率Ns的时空变化是设计地面通信链路的重要参数。本研究考察了气象参数变化对米纳和拉派干湿季节地表射电折射率的影响(2011-2013年)。从安装在米纳联邦科技大学和拉派Ibrahim Badamasi Babangida大学的对流层数据采集网(TRODAN)气象站收集的地表温度、湿度和压力数据用于计算射电折射率。计算了干季和湿季射电折射率的时平均值和月平均值。结果表明,两个站点的地表折射率均存在日变化和季节变化。折射率值在清晨和夜间较高,在下午迅速下降。在旱季,折射率一般较低,而在雨季,折射率一般较高。在旱季,拉派的折射率值高于米纳。结果还表明,折射率的日变化是由大气现象引起的,而季节变化是由区域气候条件引起的。2011年8月最大值为350 n单位,2012年7月最大值为343 n单位,2013年8月最大值为347 n单位;2011年1月最小值为275 n单位,2012年3月最小值为278 n单位,2月最小值为273 n单位。拉派地表折射率最大值分别为2011年8月(350 N-Units)、2012年8月(347 N-Units)和2013年9月(349 N-Units),最小值分别为2011年1月(289 N-Units)、2012年1月(290 N-Units)和2013年1月(297 N-Units)。
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引用次数: 0
Factors Affecting Cost Overrun of RC-PIER Jabodebek LRT Project : A Case Study of Cawang, Indonesia RC-PIER Jabodebek轻轨项目成本超支影响因素——以印尼Cawang为例
Pub Date : 1900-01-01 DOI: 10.31695/ijerat.2019.3436
Yurisdal, B. Susetyo
Light Rail Transit Development in Indonesia is progressing quite rapidly. Light Rail Transit is one of the modes of transportation solutions in the capital. The reason for the construction LRT because it more easily integrated with MRT and KRL. Due to the shortage of land in the capital, Jakarta. The system will use the system structure model structure elevated structure (cross-over structure), where pier structure is the structure of reinforced concrete columns (RC-Pier). At the time of execution occurs because the cost overrun earlier methods used inefficiently. Therefore, researchers will discuss the factors that affect the cost of crusting of 16:25% of the budget plan at work implementation RC-Pier in the LRT Jabodebek. Researchers using SPSS as the tool to get the factors that affect the cost of the implementation of the work crusting RC-Pier in LRT Jabodebek Project location of CawangDukuh Atas. The results of this study the factors that affect the efficiency gain is planning inadequate project, management, control and structure a bad project, project funding is inadequate, does not account for unexpected costs, inaccurate estimates/cost estimates are too low, collect information complete, resource constraints, the cost of construction of the LRT, the lack of experience of consultants, contractors and project managers and changes in design specifications.
印尼的轻轨交通发展相当迅速。轻轨交通是首都的交通解决方案之一。建设轻轨的原因是它更容易与捷运和京城线整合。由于首都雅加达的土地短缺。本系统将采用体系结构模型结构高架结构(跨桥结构),其中桥墩结构为钢筋混凝土柱结构(RC-Pier)。在执行时由于成本超支而发生,早期的方法使用效率不高。因此,研究人员将在Jabodebek轻轨RC-Pier实施的工作中,讨论影响结皮成本16:25%预算计划的因素。研究人员利用SPSS作为工具,在CawangDukuh Atas的LRT Jabodebek项目位置,获得影响工作结壳RC-Pier实施成本的因素。本研究的结果是影响效率增益的因素是规划不充分的项目,管理,控制和结构不良的项目,项目资金不足,没有考虑到意外成本,不准确的估计/成本估计过低,收集信息完整,资源限制,轻轨的建设成本,缺乏经验的顾问,承包商和项目经理和设计规范的变化。
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引用次数: 0
An Approach for Multi-Document Text Summarization Using Extreme Learning Machine and LexRank 基于极限学习机和LexRank的多文档文本摘要方法
Pub Date : 1900-01-01 DOI: 10.31695/ijerat.2021.3704
Wedad Abdul Khuder Naser
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引用次数: 0
Food Non-Destructive Quality Evaluation Using Color Image Analysis System 基于彩色图像分析系统的食品无损质量评价
Pub Date : 1900-01-01 DOI: 10.31695/ijerat.2019.3560
O. Boukar, Gamraïkréo Djaowé, Alban Ngatchou, L. Bitjoka
Quality inspection of food and agricultural product are difficult and labor-intensive. Simultaneously, with increased expectations for food products of high quality and safety standards, the need for accurate, fast and objective quality determination of these characteristics in food products continues to grow. However, these operations generally in Cameroon are manual which is costly as well as unreliable because the human decision in identifying quality factors such as appearance, flavor, nutrient, texture, is inconsistent, subjective and slow. Machine vision provides one alternative for an automated, non-destructive and cost-effective technique to accomplish these requirements. This inspection approach based on image analysis and processing has an important place in the food industry. The application of color image analysis system, in this case, shows clearly that all the food product studied here were discriminated over 95%.
食品和农产品的质量检验难度大,劳动强度大。同时,随着人们对食品质量和安全标准的期望越来越高,对食品中这些特征的准确、快速和客观的质量测定的需求也在不断增长。然而,在喀麦隆,这些操作通常是人工操作,这是昂贵的,也不可靠,因为人类在识别质量因素(如外观,风味,营养,质地)方面的决定是不一致的,主观的和缓慢的。机器视觉为实现这些要求提供了一种自动化、非破坏性和经济高效的技术。这种基于图像分析和处理的检测方法在食品工业中占有重要的地位。在这个案例中,彩色图像分析系统的应用清楚地表明,这里所研究的所有食品的鉴别率都在95%以上。
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引用次数: 1
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International Journal of Engineering Research and Advanced Technology
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