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2019 5th Conference on Knowledge Based Engineering and Innovation (KBEI)最新文献

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A Cascade High Gain DC-DC Converter Employing Coupled Inductor and Diode Capacitor 采用电感耦合和二极管电容的级联高增益DC-DC变换器
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8735079
Mana Hoseinzadeh, R. Ebrahimi, H. M. Kojabadi
In this paper, a novel topology of DC-DC converter with a high voltage gain is presented which is suitable for photovoltaic applications. In the proposed converter a coupled inductor with diode-capacitor cell for increasing the voltage gain is used. Moreover, the leakage energy is efficiently recycled to the output by the diode and capacitor. The proposed converter can achieve higher voltage gain with small duty cycle. The operational principles, steady state analysis and simulation and experimental verifications in continuous condition modes are presented in this paper.
本文提出了一种适用于光伏应用的具有高电压增益的新型DC-DC变换器拓扑结构。在该变换器中,为了提高电压增益,采用了带二极管-电容电池的耦合电感。此外,泄漏能量被二极管和电容器有效地回收到输出端。该变换器可以在较小的占空比下获得较高的电压增益。本文介绍了该系统的工作原理、稳态分析与仿真以及连续工况下的实验验证。
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引用次数: 5
Coordination of Directional Overcurrent Protection Relay for Distribution Network With Embedded DG 嵌入式DG配电网定向过流保护继电器的协调
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8735025
J. S. Farkhani, M. Zareein, H. Soroushmehr, H. Sieee
Distributed Generations (DGs) are small power sources in distribution network to provide reliable and economic to residential areas or suburb areas. The relay protection has an important role to protect a power system from different faults. Coordination of relay protection minimizes the operating time of relays and prevents mal-operation.The Directional Overcurrent Relays (DOR) are used for the protection of the radial distribution network with embedded DG. This paper presents coordination of the directional overcurrent taking into account faults in different places of the power system. The setting of directional overcurrent relay has two parts, i.e., an overcurrent relay and directional element. The coordination of overcurrent relay is based on the operation of relay and time-current characteristic curve.The case study is based on a real distribution network that consists of two CHP generators with 3 MW capacity, and the simulation is performed in ETAP software.
分布式电源是在配电网中为居民区或郊区提供可靠、经济的小型电源。继电保护在保护电力系统免受各种故障的影响方面起着重要的作用。继电保护协调,最大限度地减少继电器的操作时间,防止误操作。定向过流继电器(DOR)用于嵌入式DG的径向配电网的保护。本文提出了考虑到电力系统不同地点故障的定向过流协调问题。定向过流继电器的整定包括两部分,即过流继电器和定向元件。过流继电器的协调是基于继电器的动作和时间-电流特性曲线。案例研究基于一个实际配电网,该配电网由两台容量为3mw的热电联产发电机组成,并在ETAP软件中进行了仿真。
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引用次数: 15
RCDR: A Recommender Based Method for Computational Drug Repurposing 基于推荐的计算药物再利用方法
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8734933
Seyedeh Shaghayegh Sadeghi, M. Keyvanpour
Computational Drug repurposing is the problem of finding new uses for known drugs. To achieve this goal, a significant number of computational methods have been proposed, which can be categorized as Network-based and Non-network-based methods. Since network-based methods have a lot of advantages, this problem can be modelled as a network-based recommendation system. In this paper, we propose an effective approach, RCDR (Recommender Based Computational Drug Repurposing), to prioritize candidate drugs for diseases. Initially, we use drug and disease similarities to build a new drug-disease score matrix. Then, we adopt a collaborative filtering model to recommend which disease can be treated by the new drug. The experiment results show that RCDR proposes well performance compared with other state-of-the-art approaches.
计算药物再利用是为已知药物寻找新用途的问题。为了实现这一目标,已经提出了大量的计算方法,可分为基于网络的方法和非基于网络的方法。由于基于网络的推荐方法有很多优点,这个问题可以建模为基于网络的推荐系统。在本文中,我们提出了一种有效的方法,RCDR(基于推荐的计算药物再利用),以优先考虑候选药物的疾病。首先,我们使用药物和疾病的相似度来建立一个新的药物-疾病评分矩阵。然后,我们采用协同过滤模型来推荐哪些疾病可以用新药治疗。实验结果表明,与其他最先进的方法相比,RCDR具有良好的性能。
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引用次数: 9
Design and analysis of a 3.1–10.6 GHz UWB low noise amplifier with current reused technique 基于电流复用技术的3.1-10.6 GHz超宽带低噪声放大器设计与分析
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8735015
Meysam Azimi Roein
Two ultra wideband low noise amplifiers (LNAs) are presented. A common source topology is adopted for input stage to achieve wideband input matching, while a cascode stage is used as the second stage to provide power gain at high frequencies. The first work is common source with a reuse PMOS current source. It achieves a maximum power gain of 15.2dB and 3.7dB minimum NF. The power consumption is 16 mW from a 1.8 v supply. The second work is current reused technique that we use an NMOS replacing the feedback resistance to achieve flat gain. It achieves a maximum power gain of 10.5dB and 2.7dB minimum NF.
介绍了两种超宽带低噪声放大器(LNAs)。输入级采用共源拓扑,实现宽带输入匹配,第二级采用级联编码,提供高频功率增益。第一个工作是公共源与复用PMOS电流源。它实现了15.2dB的最大功率增益和3.7dB的最小NF。1.8 v电源的功耗为16mw。第二项工作是电流复用技术,我们使用NMOS代替反馈电阻来实现平坦增益。它实现了10.5dB的最大功率增益和2.7dB的最小NF。
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引用次数: 1
Improving Differential Relay Performance during Cross-Country Fault Using a Fuzzy Logic-based Control Algorithm 利用模糊逻辑控制算法提高差动继电器在跨国故障中的性能
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8734991
M. Abasi, Ahmad Torabi Farsani, A. Rohani, Mohsen Aghazadeh Shiran
This paper presents a fuzzy logic-based algorithm to improve the performance of the differential relay in short transmission line protection for Cross-Country faults. This type of faults leads to the malfunction of current differential relays, while the probability of the relay performance error becomes negligible by using a fuzzy logic system along with the changes in per-unit values and the slope of the differential relay, and consequently choosing the best stability characteristics. In the proposed algorithm, the sensitivity, operation reliability, and performance speed for several types of faults including internal faults and even the high-resistive faults are maintained in the satisfactory levels. The algorithm is also suitable for external faults with the saturation of current transformers (CTs), and it improves the relay performance. The effectiveness of the algorithm is verified in EMTDC/PSCAD software program, and the obtained results are compared with those of conventional methods.
提出了一种基于模糊逻辑的差分继电保护算法,以提高差分继电保护短线跨国故障的性能。这种类型的故障导致电流差动继电器的故障,而随着差动继电器的单位值和斜率的变化,采用模糊逻辑系统,继电器性能误差的概率可以忽略不计,从而选择最佳的稳定特性。该算法对包括内部故障甚至高阻故障在内的几种故障的灵敏度、运行可靠性和性能速度都保持在令人满意的水平。该算法也适用于电流互感器饱和的外部故障,提高了继电器的性能。在EMTDC/PSCAD软件中验证了该算法的有效性,并与传统方法的结果进行了比较。
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引用次数: 9
A new optimal relay nodes selection method for wireless sensor networks 一种新的无线传感器网络中继节点优化选择方法
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8735069
Gholamreza Kakamanshadi, Savita Gupta, Sukhwinder Singh
in wireless sensor network, sensor nodes are prone to failure due to different reasons such as environmental impact, radio interference and battery depletion, thus it is extremely vital to integrate an effective fault tolerance method within the network. Furthermore, selection of an optimal path for transmitting sensed data to the base station is significant. This paper presents a new method called optimal relay node selection, which selects two optimal relay nodes based on residual energy, failure probability, distance to relay node and total distance to base station for every collector node. Analytic hierarchy process method was used to determine the weights of relay nodes and Promethee method was used for outranking them. Furthermore, when a primary relay node fails, this method selects the secondary for providing fault tolerance against path failure. The results show that the proposed method outperforms existing algorithms in terms of First Relay Node Dead, Half Relay Node Alive, energy efficiency and throughput.
在无线传感器网络中,传感器节点容易因环境影响、无线电干扰、电池耗尽等不同原因而发生故障,因此在网络中集成有效的容错方法至关重要。此外,选择将感测数据传输到基站的最优路径是重要的。提出了一种基于剩余能量、故障概率、到中继节点的距离和到基站的总距离的中继节点最优选择方法。采用层次分析法确定中继节点的权重,采用普罗米修斯法对中继节点进行排序。此外,当主中继节点发生故障时,该方法选择辅助节点,以提供对路径故障的容错能力。结果表明,该方法在第一中继节点死亡、半中继节点存活、能量效率和吞吐量方面都优于现有算法。
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引用次数: 1
Identification Of Induction Motor Parameters Using Wiener-Hammerstein Structure Based On Artificial Bee Colony Algorithm 基于人工蜂群算法的Wiener-Hammerstein结构感应电机参数辨识
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8735055
Iman Sohrabi Chafjiri, M. Aghamohammadi, Hamid Gholipour Golroudbari
In this paper, identification of parameters of induction motors using the Wiener-Hemerstein structure based on the colony helix algorithm. Identifying the system is actually finding a mathematical model of dynamical systems from input-output data, the results of experiments, and observations. Given the importance of induction machines in the industry, maintaining and protecting them is essential. One of the ways to keep such engines in check is to continuously monitor their health by continuous monitoring of the values of its structural parameters. In this paper, an engine model is estimated using the extracted data from the engine, which includes the effective values of the stator current and the power factor and the application of the colony helium algorithm. The results of the simulation show the high accuracy of the proposed method in identifying the parameters of induction motors in comparison with the previous methods.
本文采用基于群体螺旋算法的Wiener-Hemerstein结构进行感应电机参数辨识。识别系统实际上是从输入输出数据、实验结果和观察中找到动力系统的数学模型。鉴于感应电机在工业中的重要性,维护和保护它们是必不可少的。保持这种发动机处于受控状态的方法之一是通过持续监测其结构参数的值来持续监测其健康状况。本文利用从发动机中提取的数据估计发动机模型,其中包括定子电流和功率因数的有效值,并应用了群氦算法。仿真结果表明,与现有方法相比,该方法具有较高的辨识精度。
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引用次数: 0
Increasing the Accuracy of Automatic Speaker Age Estimation by Using Multiple UBMs 利用多UBMs提高自动估计扬声器年龄的精度
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8735005
A. Bastanfard, Dariush Amirkhani, M. Hasani
In the recent years, many studies have been conducted and many programs and methods have been presented in the field of age estimation. However, the accuracy of the proposed methods remains a challenge in this field. One of the proposed methods for age estimation, which has a higher accuracy than other available methods, is the use of i-vector for automatic age estimation of the sound signal. This method uses one UBM for Gaussian Mixture model. In this paper, by increasing the number of UBMs, the Gaussian Mixture model is optimized and the accuracy of age estimation is improved. Using multiple UBMs with different Gaussian components, for each speaker multiple i-vectors corresponding to each UBM are extracted. Given that, the age of the person is estimated several times and the average of all the estimations is taken as the age of the individual. Also, the results of many experiments in the age estimation, show that PLP features can increase the accuracy of the individuals estimated age. So the second suggestion is to use this features in age estimation. Finally, to enhance the distinction of voice features, the mapping of features was introduced to a new environment; the mapping relationship to this new environment was obtained by training a deep belief network. The proposed algorithm was tested on the NIST 2004, NIST 2005 and NIST 2008 databases. In contrast to single UBM method, the results for the proposed method show a Pearson correlation of 0.8 and a mean absolute error of 5.14, suggesting a %6.67 and %17 improvements in Pearson correlation and mean absolute error, respectively.
近年来,在年龄估计领域进行了许多研究,提出了许多方案和方法。然而,所提出的方法的准确性仍然是该领域的一个挑战。本文提出的年龄估计方法之一是使用i向量对声音信号进行自动年龄估计,该方法比其他可用方法具有更高的精度。该方法对高斯混合模型使用一个UBM。本文通过增加UBMs的数量,对高斯混合模型进行了优化,提高了年龄估计的精度。使用多个具有不同高斯分量的UBM,对每个说话人提取每个UBM对应的多个i向量。鉴于此,对人的年龄进行多次估计,并将所有估计的平均值作为个体的年龄。此外,许多年龄估计的实验结果表明,PLP特征可以提高个体估计年龄的准确性。第二个建议是在年龄估计中使用这个特征。最后,为了增强语音特征的区分能力,将特征映射引入到新的环境中;通过训练一个深度信念网络,得到与新环境的映射关系。该算法在NIST 2004、NIST 2005和NIST 2008数据库上进行了测试。与单一UBM方法相比,该方法的Pearson相关系数为0.8,平均绝对误差为5.14,Pearson相关系数和平均绝对误差分别提高了%6.67和%17。
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引用次数: 6
Compact Planar UWB Elliptical Vivaldi Antenna 紧凑平面超宽带椭圆维瓦尔第天线
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8735010
Mojtaba Ahadi, J. Nourinia, C. Ghobadi, M. S. Ellis, B. Mohammadi
A design of ultra-wideband (UWB) Vivaldi antenna is reported. In this antenna, elliptical taper has been used to design the proposed antenna. The antenna is shaped by subtracting two ellipses that have different dimensions, and then limited by a rectangle. Impedance bandwidth covers a rather wide spectrum from 2 GHz to over 14 GHz with average gain of 6.6 dBi over the working frequency band. Measured results of elliptical Vivaldi antenna in the entire UWB frequency range reveal a transfer function with flat level, and a group delay with variations less than 0.5 ns. The simulation results agrees with the results acquired by measurement.
报道了一种超宽带维瓦尔第天线的设计。在该天线中,采用椭圆锥度设计天线。天线的形状是通过减去两个不同尺寸的椭圆,然后由一个矩形限制。阻抗带宽覆盖了从2 GHz到14 GHz以上的相当宽的频谱,在工作频段上的平均增益为6.6 dBi。椭圆型Vivaldi天线在整个UWB频率范围内的测量结果表明,传递函数水平平坦,群延迟变化小于0.5 ns。仿真结果与实测结果吻合。
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引用次数: 3
Utilizing distributed energy resources to improve voltage profile and lines congestion, considering uncertainties 考虑不确定性,利用分布式能源改善电压分布和线路拥塞
Pub Date : 2019-02-01 DOI: 10.1109/KBEI.2019.8734923
Yaser Mahdavi, Milad Rouhinia
In modern power systems which have subjected to severe stress, the voltage becomes important, so, attempts must be made to improve voltage profile as much as possible. To do so, in this paper the optimal size and placement of distributed energy resources like photovoltaic units and demand response programs have been performed to improve voltage profile and congestion management. Therefore two indices namely voltage profile and congestion management have been considered. Photovoltaic units and demand response programs are installed in demand side. These resources inject active power at load buses and reduces from current flowing in lines. So, it increases voltage magnitude at load buses. For congestion management with these resources exist same reason. So, distributed energy resources installation idea is considered in this paper.Furthermore, in order to establish the more realistic condition of a power system, radiation uncertainty of sun and load uncertainty is also considered.
在现代电力系统中,电压变得非常重要,因此必须尝试尽可能地改善电压分布。为此,本文对分布式能源(如光伏发电机组)的最佳尺寸和布局以及需求响应程序进行了优化,以改善电压分布和拥塞管理。因此考虑了电压分布和拥塞管理两个指标。光伏机组和需求响应程序安装在需求侧。这些资源在负载总线上注入有功功率,并减少线路中流动的电流。因此,它增加了负载母线的电压幅度。对于这些资源的拥塞管理存在同样的原因。因此,本文考虑了分布式能源的安装思路。此外,为了建立更真实的电力系统状态,还考虑了太阳辐射的不确定性和负荷的不确定性。
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引用次数: 0
期刊
2019 5th Conference on Knowledge Based Engineering and Innovation (KBEI)
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