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2018 International Conference on Computer, Control, Electrical, and Electronics Engineering (ICCCEEE)最新文献

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Energy and Exergy analysis of solar water heating system integrated with phase change material (PCM) 相变材料(PCM)集成太阳能热水系统的能量与火用分析
Adil A. M. Omara, Abuelnuor A. A. Abuelnuor, Muaaz A. A. Dafaallah, Abdalrahman M. A. Ali, Mustafa A. M. Alshoubli
Recent projections anticipate that the essential energy consumption will increase by 48% in 2040. This has prompted to a need to create proficient and sustainable techniques of storing energy. Solar thermal energy can be stored in the form of latent heat by utilizing appropriate phase change materials (PCMs), which offer high heat storage capacity. An experimental study was done in Khartoum city during summer season to investigate the thermal performance of solar water heating system integrated with PCM using flat plate collector as a heat source. The PCM used was paraffin wax whose melting point is 56 °C. An energy and exergy analysis was done to assess the thermal performance of the system and fix the thermodynamic blemish in the energy system. The outcomes showed that PCM acted as smart material which can regulate the temperature of system in the required range. The outcomes indicated that the overall energy and exergy efficiencies of the system were 85% and 76% respectively. The number of entropy generated was 0.26. The results showed that PCM acted as smart regulator to keep supplying the amount of heat to the system even after the absent of heat source. PCM also could increase the exergy output and led to reduce the exergy destruction. This indicates that the PCM could improve the exergy efficiency. The overall outcomes showed that the PCM optimized the performance of solar water heater system by improve energy and exergy efficiencies.
最近的预测预测,到2040年基本能源消耗将增加48%。这促使人们需要创造熟练和可持续的储能技术。太阳能热能可以通过适当的相变材料(PCMs)以潜热的形式储存,相变材料具有很高的储热能力。在喀土穆市夏季进行了平板集热器作为热源的PCM太阳能热水系统热性能试验研究。所使用的PCM为石蜡,其熔点为56℃。进行了能量和火用分析,评估了系统的热工性能,修复了能源系统的热力学缺陷。结果表明,PCM作为一种智能材料,可以将系统的温度调节在要求的范围内。结果表明,该系统的总能量和火用效率分别为85%和76%。生成的熵数为0.26。结果表明,PCM作为智能调节器,即使在没有热源的情况下也能保持系统的供热量。PCM还可以增加火用输出,减少火用破坏。这表明PCM可以提高火用效率。总体结果表明,PCM通过提高能源和火用效率来优化太阳能热水器系统的性能。
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引用次数: 13
Design and Simulation of Voltage Source Grid Connected Inverter (VSI) 电压源并网逆变器(VSI)设计与仿真
A. B. Taha, S. Babiker
Design and simulation of a voltage source grid connected inverter (VSI) have been introduced in this paper. A grid connected PV array of 250 KW connected to a 25-kV grid via a three-phase voltage source inverter (VSI) was designed and simulated. Mathematical and electrical equations of the design have been presented. Different components of the system have been described and simulated using MATLAB/ SIMULINK. A control unit of the grid-side inverter controlling the maximum power point tracking (MPPT), DC voltage regulator, current regulator, pulse width modulation (PWM) and phase lock loop (PLL) circuit have been discussed.
介绍了一种电压源并网逆变器(VSI)的设计与仿真。设计并仿真了一种250kw并网光伏阵列,通过三相电压源逆变器(VSI)与25kv电网连接。给出了设计的数学方程和电学方程。利用MATLAB/ SIMULINK对系统的各个组成部分进行了描述和仿真。讨论了电网侧逆变器控制最大功率点跟踪(MPPT)、直流稳压器、稳压器、脉宽调制(PWM)和锁相环(PLL)电路的控制单元。
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引用次数: 2
Dynamics and Control of a Two-link Manipulator using PID and Sliding Mode Control 基于PID和滑模控制的双连杆机械臂动力学与控制
Amin A. Mohammed, A. Eltayeb
A robotic arm having two links is considered in this report for modeling and control. First the dynamic model of the robot is obtained using the so-called Lagrange equation, then a robust control strategy based on the conventional sliding mode control is introduced to control the motion of the robot at specific position for pick and place tasks along with PID control scheme. The results of the two controllers are compared. From the simulation results the SMC is found to be superior to the PID controller in term of fast and robust response yet with higher control input. High join speeds are observed in case of SMC which are related to the high control signals.
本报告考虑了具有两个连杆的机械臂的建模和控制。首先利用拉格朗日方程建立机器人的动力学模型,然后在常规滑模控制的基础上引入鲁棒控制策略,结合PID控制方案对机器人在特定位置的运动进行控制,完成拾取任务。比较了两种控制器的控制结果。仿真结果表明,在较高的控制输入条件下,SMC在快速鲁棒响应方面优于PID控制器。在SMC情况下,观察到高连接速度,这与高控制信号有关。
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引用次数: 15
Design of Noninvasive Continuous Glucose Monitoring System 无创血糖连续监测系统的设计
Ragda Mamoun, M. Hadi, Dr. Emtithal Ahmed, Dr. Omer Adam
Conventional techniques for monitoring glucose levels are limited by tremendous side effects. Therefore, the noninvasive continuous glucose monitoring system was introduced to provide continuity of check, less side effects with an accuracy of 89%, by calculating the glucose level from the output voltage of the probe pulse oximeter through an equation derived using Microsoft Excel Regression Analysis Tool, allowing its display in a liquid crystal display and further regulation by injecting insulin or glucagon.
监测血糖水平的传统技术受到巨大副作用的限制。因此,引入无创连续血糖监测系统,通过使用Microsoft Excel回归分析工具推导公式,从探头脉氧仪的输出电压计算血糖水平,并在液晶显示器上显示,并通过注射胰岛素或胰高血糖素进一步调节,从而提供连续性检查,副作用少,准确度达89%。
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引用次数: 0
Modeling & Mitigation of Geomagnetically Induced Currents (GICs) for Single-Phase Power Transformer 单相电力变压器地磁感应电流(gic)建模与抑制
M. Yagoub, Zheng Tao
This paper describes the effect of Geomagnetically Induced Currents (GICs) in single phase-transformer and how to mitigation the phenomena using capacitor at the ground for the transformer, Geomagnetically Induced Currents (GICs) arise from fluctuations in Earth’s magnetic field and can reach alarmingly high levels and cause malfunctions or blackouts in the power grids in which they occur. Under GICs the transformer core suffers a half-cycle saturation its leads to disturbances in the power system, also the design of transformer its impact by GICs. GICs cause some problem in power transformers like heating, burning winding, reactive power consumption and increase odd and even harmonics. Capacitor eliminate the GIC, MATLAB-SIMULINK used to simulate the single-phase transformer.
本文介绍了地磁感应电流(gic)在单相变压器中的影响,以及如何在变压器中使用接地电容来缓解这种现象。地磁感应电流(gic)是由地球磁场的波动产生的,可以达到惊人的高水平,并导致发生故障或停电的电网。在GICs作用下,变压器铁心发生半周饱和,引起电力系统的扰动,变压器的设计也受到GICs的影响。集成电路在电力变压器中存在发热、烧绕组、无功功率消耗和奇偶谐波增加等问题。电容消除了GIC,用MATLAB-SIMULINK对单相变压器进行仿真。
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引用次数: 3
The Internet-of-Things and Integration with Wireless Sensor Network Comprehensive Survey and System Implementation 物联网与无线传感器网络集成综合调查与系统实现
Moez Altayeb, S. Sharif, Suliman Abdella
in this paper we introduce the concept of the Internet of Things technology (IoT) and its network stack and protocols, utilizing new emerging computation system, as well as the method that interconnect with Wireless Sensor Network (WSN). A special state-of-the-art paradigm for WSN node is designed and implemented from ARM Cortex computation system and Programmable System on Chip (PSoC). The node drive the data to the internet using special network stack, depending on IPv6 over Low-Power Wireless Personal Area Networks (6LoWPAN) protocol, which integrates novel effectiveness and solutions for sensors issues. In addition, the cloud computing technology is used to reduce the amount of data in resources constrained devices and simplify the surveillance from any device support internet.
本文介绍了物联网技术的概念及其网络栈和协议,利用新兴的计算系统,以及与无线传感器网络(WSN)互连的方法。基于ARM Cortex计算系统和可编程芯片(PSoC),设计并实现了一种特殊的WSN节点模式。该节点使用特殊的网络堆栈将数据驱动到互联网,这取决于IPv6低功耗无线个人区域网络(6LoWPAN)协议,该协议集成了新颖的有效性和传感器问题的解决方案。此外,云计算技术用于减少资源受限设备中的数据量,简化从任何设备支持互联网的监控。
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引用次数: 2
Characterization of Micro-heater and Temperature Sensor in Micro-electromechanical System Device for Gas Detection 微机电系统气体检测装置中微加热器和温度传感器的特性研究
M. Ahmed, J. Dennis, M. Khir, A. Rabih
Operating temperature is crucial for a Polysilicon Multi-User Micro electro-mechanical system Processes (PolyMUMPs) gas sensor considering the serious impacts on sensors' selectivity and reliability. While it is difficult to measure this operating temperature because the size of the sensor. This paper studies the characterization of micro-heater and temperature sensor made of gold metal, embedded in the device. The measured resistance for the temperature sensor is found to be close to the modelled values within 0.69 % error. Temperature coefficient of resistance (TCR) of the temperature sensor in a range of 25-105°C is found. TCR increases Iinearly with increasing the temperature and decreases Iinearly with decreasing the temperature. It was found to be 0.00326/°C for the increasing temperature and 0.0034/°C for the decreasing temperature, compared to 0.00325/°C reported TCR for gold in the literature, with an error of 4.12% and 4.37%, respectively.
工作温度对多晶硅多用户微机电系统工艺(PolyMUMPs)气体传感器的选择性和可靠性有重要影响。而由于传感器的尺寸,很难测量这种工作温度。本文研究了嵌入器件的金金属微加热器和温度传感器的特性。温度传感器的测量电阻与模型值接近,误差在0.69%以内。得到了温度传感器在25 ~ 105℃范围内的电阻温度系数(TCR)。TCR随温度的升高呈线性增加,随温度的降低呈线性降低。与文献报道的金的TCR为0.00325/°C相比,温度升高时TCR为0.00326/°C,温度降低时TCR为0.0034/°C,误差分别为4.12%和4.37%。
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引用次数: 2
Investigation and Estimation of Fast Retransmission Method for Reliable Data Transmission in TCP TCP中可靠数据传输的快速重传方法研究与评价
Nabaa Adil Elawad Farah, Alaa Yasir, Yousif Elhadi
The transmission control protocol TCP is the protocol that is responsible for the reliable data transmission in the TCP/IP standard. Therefore, it has to recover the packets lost via data propagation and retransmit these packets after three duplicate acknowledge. Wait for three duplicate acknowledge could increase the total delay in the network. This work aims to investigate shorter retransmission time. It was proposed that two duplicate acknowledge and the NS2 program was used to simulate the transmission process in the network, taking into account all the factors that affect the transmission. From this project, it has been found that retransmitted lost packets by least time happen when just two duplicate acknowledges were used, and this time rises up when three duplicate acknowledges were used.
传输控制协议TCP是TCP/IP标准中负责数据可靠传输的协议。因此,它必须恢复在数据传播过程中丢失的数据包,并在三次重复确认后重新传输这些数据包。等待三次重复的确认可能会增加网络中的总延迟。本工作旨在研究更短的重传时间。考虑到所有影响传输的因素,提出了使用两个重复确认和NS2程序来模拟网络中的传输过程。从这个项目中发现,当只使用两个重复确认时,重传丢失包的时间最少,当使用三个重复确认时,重传丢失包的时间增加。
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引用次数: 3
Utilization of Renewable Energy Resources in Al-Fashir City 法希尔市可再生能源利用研究
K. Eltayeb, M. M. Hamza
Sudan's vast and diverse lands give rise to a wide spectrum of climates and landscapes. Energy is a key factor for development of Sudan's cities and the national economy. This paper discusses the renewable energy resources available in western Sudan namely at Al-Fashir city, in addition to how to utilize it. Western Sudan has a long history of difficulties in meeting its energy demand making it hard to execute strategic plans thus why it is an important study case. The historical background of the city is provided with the major energy issues the city is facing. The paper analyzes the most efficient renewable energy sources in the area to get the best combination that will provide the maximum utilization. Another issue is the refugee camps in the area that have no reliable energy resources. The mechanism of generating energy using wind and solar power are discussed, analyzing the potential leads to the use of wind energy where wind turbines are placed on Marrah Mountain. This paper justifies why it is the most efficient resource to supply the city because it's clean, reliable and other advantages are discussed. For refugee camps, it is found that photovoltaic cells are the best choice for electricity generation since its clean and a mobile source. Energy conversion systems are sized to meet the demand. Conclusions will be drawn to summarize the findings of the paper.
苏丹广袤多样的土地造就了各种各样的气候和景观。能源是苏丹城市发展和国民经济的关键因素。本文讨论了苏丹西部地区即法希尔市的可再生能源资源,以及如何利用可再生能源。长期以来,苏丹西部在满足其能源需求方面一直存在困难,因此很难执行战略计划,因此它是一个重要的研究案例。城市的历史背景提供了城市面临的主要能源问题。本文分析了该地区最有效的可再生能源,以获得最佳组合,以提供最大的利用率。另一个问题是该地区的难民营没有可靠的能源资源。讨论了利用风能和太阳能发电的机理,分析了在马拉山上放置风力发电机的风能利用的潜在原因。本文从清洁、可靠等方面论证了为什么它是城市最有效的资源供给。对于难民营来说,光伏电池是最佳的发电选择,因为它既清洁又可移动。能源转换系统的大小可以满足需求。将得出结论来总结本文的研究结果。
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引用次数: 0
A Comparative Study of MFCC and LPCC Features For Speech Activity Detection Using Deep Belief Network MFCC和LPCC特征在深度信念网络语音活动检测中的比较研究
Olla Eltiraifi, E. Elbasheer, M. Nawari
Speech activity detection (SAD) is an important preprocess in speech processing. It identifies intervals of the audio signal with speech from intervals without speech. In this paper speech activity detection is performed using a Deep BeliefNetwork (DBN). The features used as input to the network were either Mel Frequency Cepstral Coefficients (MFCC) or Linear Predictive Cepstral Coefficients (LPCC). The DBN was implemented using MATLAB toolbox DeeBNET V3.0. The training and testing were performed with 13 MFCC features as input and then 12 LPCC features as input. When the testing was performed with speech containing audio data of different signal to noise ratio (SNR) values, the network classified it accurately. The same accuracy was not achieved when the testing data consisted of only stationary noise. The DBN provided near ideal results for SAD when trained with both MFCC and LPCC features.
语音活动检测是语音处理中的一个重要预处理。它识别音频信号的间隔有语音和间隔没有语音。本文使用深度信念网络(Deep BeliefNetwork, DBN)进行语音活动检测。作为网络输入的特征是Mel频率倒谱系数(MFCC)或线性预测倒谱系数(LPCC)。DBN采用MATLAB工具箱DeeBNET V3.0实现。以13个MFCC特征为输入,再以12个LPCC特征为输入,进行训练和测试。当对含有不同信噪比音频数据的语音进行测试时,该网络对语音进行了准确的分类。当测试数据仅由平稳噪声组成时,无法达到相同的精度。当同时使用MFCC和LPCC特征训练时,DBN为SAD提供了接近理想的结果。
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引用次数: 7
期刊
2018 International Conference on Computer, Control, Electrical, and Electronics Engineering (ICCCEEE)
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