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2020 3rd International Conference on Computing, Mathematics and Engineering Technologies (iCoMET)最新文献

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Super twisting sliding mode control for inner current suppression of Modular Multilevel Converter 模块化多电平变换器内部电流抑制的超扭滑模控制
W. Uddin, M. Ishfaq, K. Zeb, S. Islam, Hee Je Kim, M. Khan, Z. Ullah, I. Khan, Khadim Ullah Jan, Muhammad Asim Sarwar
Modular Multilevel Converter (MMC) is very popular due to its flexibility, use of low rating devices, low harmonic distortion, and high efficiency. Despite these advantages, MMC faces challenges of controlling its parameters especially inner current and capacitor voltages. This paper presents the control of the inner current of MMC using Sliding Mode Controller (SMC). The switching function of SMC is based on 2nd order super twisting algorithm. The Proposed super twisting algorithm is proved to be efficient in controlling the inner current. The 2nd order harmonic is effectively suppressed, and the inner current is fully converged to its reference value. Moreover, the continuous nature of the super twisting algorithm solves the chattering issue. The implementation of MMC and its control is carried out in MATLAB/Simulink.
模块化多电平变换器(MMC)由于其灵活性、低额定器件的使用、低谐波失真和高效率而受到广泛欢迎。尽管有这些优点,但MMC在控制其参数,特别是内部电流和电容器电压方面面临着挑战。本文采用滑模控制器(SMC)对MMC的内部电流进行控制。SMC的开关函数是基于二阶超扭转算法的。所提出的超扭转算法在控制内部电流方面是有效的。二阶谐波被有效抑制,内部电流完全收敛到参考值。此外,超扭转算法的连续特性解决了抖振问题。在MATLAB/Simulink中实现了MMC及其控制。
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引用次数: 1
Classification of Mental Workload (MWL) using Support Vector Machines (SVM) and Convolutional Neural Networks (CNN) 基于支持向量机(SVM)和卷积神经网络(CNN)的心理负荷分类
Umer Asgher, Khurram Khalil, Y. Ayaz, Riaz Ahmad, Muhammad Jawad Khan
In the current era of technological advancements and rising human-machine interaction, urged the vital importance of human factors and ergonomics in an industrial collaborative environment. These ergonomic needs have made it essential to analyze the industrial cognitive processes like mental workload (MWL), stress and vigilance in the ecological environment. Conventionally Electroencephalography (EEG) was used for assessment of brain electrical activity but recently functional Near-Infrared Spectroscopy (fNIRS) has immerged as a better substitute for acquiring brain signals with fewer protocols and enhanced spatial resolution. Over the period of time Machine learning algorithms (LDA, k-NN, ANN) are used to classify MWL and affiliated brain functions. Now the trend of employing Deep learning techniques is gaining popularity. In this study, we analyzed and classified MWL states using Machine learning (SVM) and Deep learning (CNN) algorithms. The classification accuracies achieved with Deep learning (CNN) outperformed the accuracies achieved with Machine learning algorithms. The best accuracies were achieved using CNN that are in the range of 80-87%. Finally, a comparison is drawn between Machine learning and Deep learning algorithms for better classification and discrimination of cognitive loads.
在当今技术进步和人机交互不断增加的时代,在工业协作环境中,迫切需要人的因素和人体工程学的重要性。这些符合人体工程学的需求使得分析工业认知过程如精神负荷(MWL)、压力和警惕在生态环境中变得必要。传统的脑电图(EEG)被用于评估脑电活动,但最近功能近红外光谱(fNIRS)已成为一种更好的替代方法,以较少的协议和增强的空间分辨率获取脑信号。在一段时间内,机器学习算法(LDA, k-NN, ANN)被用于分类MWL和相关的脑功能。现在,采用深度学习技术的趋势越来越受欢迎。在本研究中,我们使用机器学习(SVM)和深度学习(CNN)算法对MWL状态进行分析和分类。深度学习(CNN)实现的分类精度优于机器学习算法实现的精度。使用CNN获得的最佳准确率在80-87%之间。最后,对机器学习和深度学习算法进行了比较,以更好地对认知负荷进行分类和区分。
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引用次数: 14
Development of Eco-Industrial Park in Sindh, Pakistan 巴基斯坦信德省生态工业园的发展
Waseem Ahmed, R. Memon, Abdul Fatah Abbasi
Industrialization plays major role in economic development and it is growing very rapidly to fulfil the requirements of resident by increasing production. However, creating financial advantages is no longer the sole goal of industrial growth in the present worldwide sustainable industrial development trend due to the depletion of ozone layer, eco system destruction and changed weather phenomena severely. Nowadays, increasing importance is given on the idea of compatible and continuous economic, ecological and social growth, and the use of eco-efficiency to assess the relationship among the environment influence and economic cost and Eco-industrial Park (EIP) is the solution of dropping environmental problems and promoting financial interests through the interchange of products and energy between sectors for mutual benefit. Thus, the main purpose of this research is to model an Eco-Industrial park in Sindh region in order to find the feasibility as well as cost savings benefits. To achieve this firstly, the literature review and field survey is carried out to identify the potential industries, which are suitable for establishing an Eco - Industrial park. Secondly, the data of wastes/by-products of these industries are determined, after that the model is prepared to show the material flow between the waste producing and utilizing industries. Finally, the possible utilization of these wastes/byproducts is worked out. It is estimated that the coal power plant produces 2273 tons of fly-ash, 239.9 tons of bottom ash and 300 tons of gypsum every day. Thus, utilizing these wastes/byproducts will save around Rs. 2.27 million daily.
工业化在经济发展中起着重要的作用,通过增加生产来满足居民的需求,工业化发展非常迅速。然而,由于臭氧层的消耗、生态系统的破坏和气候现象的严重变化,在当前世界范围内的可持续工业发展趋势中,创造金融优势不再是工业增长的唯一目标。当今社会越来越重视经济、生态和社会可持续发展的理念,利用生态效率来评价环境影响与经济成本之间的关系,生态工业园区是通过部门之间的产品和能源交换实现互利共赢,解决环境问题和促进经济利益的解决方案。因此,本研究的主要目的是在信德省建立一个生态工业园区模型,以找到可行性和成本节约效益。为了实现这一目标,本文首先进行了文献综述和实地调查,以确定适合建立生态工业园区的潜在产业。其次,确定这些行业的废物/副产品数据,然后准备模型来显示废物产生和利用行业之间的物质流动。最后,对这些废物/副产品的可能利用进行了分析。据测算,该燃煤电厂每天生产粉煤灰2273吨,底灰239.9吨,石膏300吨。因此,利用这些废物/副产品每天将节省约227万卢比。
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引用次数: 0
Role of Reward satisfaction on Employee Outcome: A case of power distribution sector of Pakistan 薪酬满意度对员工工作成果的影响:以巴基斯坦配电行业为例
Liu Dunnan, Fazal Hussain Awan, Nasif Raza Jaffri, Shoaib Ahmad
Pakistan is a big country with diverse nature of land ranging from mountain, deserts to plain lands. There are eleven distribution companies to cover electrical power distribution over 100Million consumers. The field work of electrical distribution is sometimes life threating and tough. The consumers have their first interaction with distribution staff. A satisfied distribution staff led towards satisfied customer. The main objective of this research work is to look for the influence of various reward types on several variables of a company’s outcomes. These include worker outcomes and performance, like satisfaction from their jobs and turnover intention. Only remunerations alone do not encourage the workers’ attitudes and responses but their approach towards the remunerations regarding the fulfillment of their outcomes from the persuaded job. Employees manage their attitudes or responses, which might be positive or negative, depending on their fulfilment of remunerations. In the context of equity theory, if a worker thinks the outcome of his/her input to output percentage lacks in contrast to his/her colleagues, it might develop a sense of non-fulfilment and hence might lose their output efficacy.
巴基斯坦是一个土地种类繁多的大国,从山地、沙漠到平原都有。全国有11家配电公司,覆盖1亿多用户的电力分配。现场配电工作有时是危及生命和艰苦的。消费者第一次与分销人员互动。一个满意的配送人员会带来满意的客户。本研究工作的主要目的是寻找各种奖励类型对公司业绩的几个变量的影响。这些包括员工的成果和表现,比如对工作的满意度和离职意向。只有薪酬本身不能鼓励工人的态度和反应,而是他们对薪酬的态度和反应,这与他们从被说服的工作中获得的成果有关。员工管理他们的态度或反应,这可能是积极的或消极的,这取决于他们对报酬的履行。在公平理论的背景下,如果一个工人认为他/她的投入产出百分比的结果与他/她的同事相比缺乏,那么他/她可能会产生一种非成就感,从而可能失去他们的产出效率。
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引用次数: 0
Newly Constructed Power Plants in Pakistan along-with HR Practices 巴基斯坦新建电厂及人力资源实践
Liu Dunnan, Fazal Hussain Awan, Usama Abrar, A. Saleem, J. Yang, Shafaat Ali
Energy shortage in Pakistan from last ten-years encourages small and big industries to construct their own Power-plant. These plants range from 1MW to 20MW. The power plant has different departments to handle engineering, maintenance, operation and related issues. Human resource (HR) department has the presence to efficiently handle man-power. This academic work takes a look at how human resource (HR) practices fix people working in power plants and decrease employee embeddedness. Indeed, we inquired into the revolving repercussion of the organizational appointment embedded in an association between human resource (HR), and a member of staff revenue objective. The assumptions are experimented via data from 200 respondents from newly constructed power plants in Pakistan. As forecasted, performance appraisal and organizational rewards decreased turnover intentions. Employee development activities increased employees’ perceptions with greater turnover intentions. The results suggest that organizations hoping to use HR practices to deter turnover may experience the greatest success by using performance management and reward systems to increase perceptions of organizational fit.
巴基斯坦过去十年的能源短缺促使大大小小的工业建设自己的发电厂。这些电厂的容量从1兆瓦到20兆瓦不等。电厂有不同的部门来处理工程、维护、运行和相关问题。人力资源(HR)部门有能力有效地管理人力资源。这项学术工作着眼于人力资源(HR)实践如何固定在发电厂工作的人,并降低员工的嵌入性。事实上,我们调查了在人力资源(HR)和员工收入目标成员之间的关联中嵌入的组织任命的循环影响。这些假设是通过来自巴基斯坦新建电厂的200名受访者的数据进行实验的。正如预测的那样,绩效评估和组织奖励降低了离职意愿。员工发展活动增加了员工的感知,员工的离职意愿也更高。结果表明,希望利用人力资源实践来阻止人员流失的组织可能会通过使用绩效管理和奖励系统来增加组织契合度的感知而获得最大的成功。
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引用次数: 0
Backstepping based MPPT Control Technique for Permanent Magnet Synchronous Generator Wind Energy Conversion System 基于反演的永磁同步发电机风能转换系统MPPT控制技术
U. Khan, Zaheer Alam, Waleed Ahmad, Z. Khan, Rashid Khan, Z. Ullah
The unpredictable and stochastic speed of the wind makes the entire wind energy conversion system (WECS) highly nonlinear. In such situations, the controller aim is to maximize the extracted power (MP). At first stage, the dynamic model of the permanent magnet synchronous generator (PMSG) is developed and then the model is converted to Bronwsky form. Consequently, the overall system is subdivided into two subsystems i.e., a second order visible dynamic system and a first order internal dynamic system. The internal dynamics are proved stable i.e., the system under study is minimum phase. Now, the main task is that the output of the visible dynamic system should track a varying profile of the wind speed. This paper presents the nonlinear backstepping based maximum power point tracking (MPPT) algorithm to ensure the MP extraction from variable-speed (fixed pitch) WECS. MATLAB/Simulink tool is used for testing the proposed controller under variable wind speed profile. The simulation results validate the robustness of the proposed control scheme. Furthermore, backstepping is compared with feedback linearization (FL) control that clearly outshines our proposed strategy.
风速的不可预测性和随机性使得整个风能转换系统高度非线性。在这种情况下,控制器的目标是最大限度地提取功率(MP)。首先建立了永磁同步发电机的动力学模型,然后将模型转化为布朗斯基形式。因此,整个系统被细分为两个子系统,即二阶可见动力系统和一阶内部动力系统。内部动力学稳定,即系统处于最小相位。现在,主要的任务是,可见光动态系统的输出应该跟踪风速的变化轮廓。提出了一种基于非线性反演的最大功率点跟踪算法,以保证变速(定螺距)wcs的最大功率点提取。利用MATLAB/Simulink工具对所设计的控制器在变风速剖面下进行了测试。仿真结果验证了所提控制方案的鲁棒性。此外,将反演与反馈线性化(FL)控制进行了比较,结果明显优于我们提出的策略。
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引用次数: 4
Evaluating Energy Efficiency of Buildings using Artificial Neural Networks and K-means Clustering Techniques 基于人工神经网络和k -均值聚类技术的建筑能效评估
A. Nazir, Ahsan Wajahat, F. Akhtar, Faheem Ullah, Sirajuddin Qureshi, Sher Afghan Malik, A. Shakeel
The consumption of energy in buildings has risen abruptly over the last decades. Due to less energy-efficient buildings, most of the energy is being thrown in our surroundings thus making an adverse effect on our environment. In this paper, heating and cooling loads of private or non-commercial buildings are covered. By implementing the proposed technique, which is a blend of cluster analysis and Artificial Neural Network (ANN), evaluation and prediction are performed. The estimation of heating and cooling loads of private or non-commercial buildings are performed using eight input variables in the ANN-based model. The details of variables are as follows, a relative surface area, total height, compactness, roof area, glazing area distribution, orientation, glazing area, and wall area. K-means clustering methodology is then used to cluster buildings on the basis of output variables. Stand on simulated literature data, evaluation of 768 different private or non-commercial buildings is done using the above-suggested method. Research results depicted that depending upon input variables, the above-suggested approach can efficiently evaluate heating and cooling load that is very much close to real test results.
在过去的几十年里,建筑物的能源消耗急剧上升。由于建筑的节能程度较低,大部分的能源被扔到我们周围的环境中,从而对我们的环境产生了不利的影响。本文涵盖了私人或非商业建筑的冷热负荷。通过将聚类分析和人工神经网络(ANN)相结合的方法进行评价和预测。在基于人工神经网络的模型中,使用8个输入变量对私人或非商业建筑的冷热负荷进行估计。变量的细节如下:相对表面积、总高度、密实度、屋顶面积、玻璃面积分布、朝向、玻璃面积、墙面面积。然后使用k均值聚类方法在输出变量的基础上对建筑物进行聚类。在模拟文献数据的基础上,采用上述方法对768栋不同类型的私人或非商业建筑进行了评价。研究结果表明,根据输入变量的不同,上述方法可以有效地评估出与实际测试结果非常接近的冷热负荷。
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引用次数: 1
A new reliable Single-Stage Single-Phase Ac-Ac Converter based Dynamic Voltage Restorer for Voltage Sag/Swell compensation 一种可靠的单级单相交流变换器动态电压恢复器,用于电压起伏补偿
Shabab Zahra, M. Siddique, Jawad Hussain, Sumera Jabbar, M. Riaz
This paper address the numerous issues associated to power quality. The distribution systems are experiencing significant power quality problems including voltage dip, voltage surge, harmonics and poor voltage regulation. Dynamic voltage restorer (DVR) consisting of power electronics converter is utilized to stabilize the system voltage during disturbances. It protects the sensitive electronics equipment and save the loss of million dollars to industry each year. This paper introduces a DVR based on a single phase ac-ac converter to overcome aforementioned problems. To overcome these problem, novel switching patterns are proposed for buck-boost converter with versatile mode of operations. The proposed scheme is simulated in Saber software.
本文讨论了与电能质量相关的许多问题。配电系统面临着电压跌落、电压浪涌、谐波和电压调节不良等严重的电能质量问题。采用由电力电子变换器组成的动态电压恢复器(DVR)来稳定扰动时的系统电压。它保护了敏感的电子设备,每年为工业节省了数百万美元的损失。本文介绍了一种基于单相ac-ac变换器的DVR,以克服上述问题。为了克服这些问题,提出了一种具有通用工作模式的buck-boost变换器的新型开关模式。该方案在Saber软件中进行了仿真。
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引用次数: 6
An Empirical Review of Barriers in Development of Renewable Energy in Pakistan: A Case of Solar Energy 巴基斯坦可再生能源发展障碍的实证分析:以太阳能为例
Dongjun Dongjun, M. Shahzad, Shakeel Ahmed Jaskani
In Pakistan the major source of energy is petroleum. Pakistan is one of the largest countries in the world and now is emerging its industry so, the current production of energy is not enough for the needs of the country. Traditional sources of energy production have bad impact on environment and also these are not suitable for the economic condition of the country. Now it’s the time to move towards nontraditional sources of energy. Current study is conducted to suggest best source of energy which can be meet the needs of the country. Conclusion of the study suggest that in the current scenario of the country solar energy is the best solution because of its distinguished characteristics such as cost efficiency, long life and low maintenance. Along with all its characteristics this source of energy has some barriers to implement in Pakistan. At the end of some barriers are summarized which are hurdles in the development of solar energy in Pakistan and also recommendations are presented at the end which will helpful to overcome energy crisis in the country.
巴基斯坦的主要能源是石油。巴基斯坦是世界上最大的国家之一,现在正在兴起其工业,因此,目前的能源生产不足以满足该国的需求。传统的能源生产方式不仅对环境有不良影响,而且与我国的经济条件也不相适应。现在是时候转向非传统能源了。目前的研究是为了建议能够满足国家需求的最佳能源。研究结论表明,在该国目前的情况下,太阳能是最佳解决方案,因为它具有成本效益,长寿命和低维护等显著特点。这种能源具有各种特点,但在巴基斯坦实施时有一些障碍。最后总结了巴基斯坦发展太阳能的一些障碍,并提出了有助于克服该国能源危机的建议。
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引用次数: 1
A Purposed model for Quadruped footprint generation 四足动物足迹生成的专用模型
Asad Bhatti, Z. Bhatti, S. Memon, A. Waqas
Quadruped animation is a ever-growing field having enormous complex parameters of motion due to vide range of gait patterns. In this paper we discuss the problem of generating quadruped motion automatically by first predicting and generating footprints of quadruped motion based on number of steps and stride length and stride height. The planning and prediction algorithms is able to generate autonomous motion, which dynamically generates new footprints and associated new gait motions. The purposed model is using procedural programming technique to calculate the foot placement values for quadruped based on center of mass and trajectory optimization.
四足动物动画是一个不断发展的领域,由于步态模式的广泛范围,运动参数非常复杂。本文讨论了基于步数、步幅和步高预测和生成四足运动足迹的四足运动自动生成问题。规划和预测算法能够产生自主运动,动态地产生新的足迹和相关的新步态运动。该模型采用过程规划技术,基于质心和轨迹优化计算四足动物的足部放置值。
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引用次数: 0
期刊
2020 3rd International Conference on Computing, Mathematics and Engineering Technologies (iCoMET)
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