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2013 International Conference on Information Technology and Electrical Engineering (ICITEE)最新文献

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A parametric motion concatenation method using cubic Bézier interpolation 一种基于三次bsamizier插值的参数化运动拼接方法
Suthasinee Nopparit, N. Pantuwong, Masanori Sugimoto
This paper presents a novel motion concatenation method for parametric motion synthesis techniques. First, motion groups are created based on the actions in each motion. We then extract all of the parameters that control the synthesized motions. To connect the motion groups, we propose a motion concatenation algorithm based on cubic Bézier interpolation that can be used to connect any pair of motions. All of the poses are pre-calculated before interpolation, so that the concatenated motions can be synthesized rapidly during the concatenation phase. Although there is no intersection region between the parameter spaces, the proposed method guarantees that transitions between motions can be generated for any consecutive motions, which is a problem found in existing methods.
针对参数化运动合成技术,提出了一种新的运动拼接方法。首先,根据每个动作中的动作创建动作组。然后我们提取控制合成运动的所有参数。为了连接运动组,我们提出了一种基于三次bsamizier插值的运动连接算法,该算法可用于连接任何一对运动。所有的姿态在插值前都进行了预计算,以便在拼接阶段快速合成拼接运动。虽然参数空间之间不存在相交区域,但该方法保证了任意连续运动都能产生运动间的过渡,这是现有方法存在的问题。
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引用次数: 1
Likelihood calculation classification for Indonesian language news documents 印尼语新闻文档的似然计算分类
Aini Rachmania, J. Jaafar, N. Zamin
Text categorization has been an important research area that seeks to classify textual documents into a group of predetermined categories. Unfortunately, the interest towards Indonesian news classification has been very little. In this paper, we propose a text categorization algorithm based on Bracewell method that uses the likelihood calculation between the article and the category's keywords. Through experiments, the algorithm succeeded in classifying Indonesian news corpus with accuracy as high as 93,84% in offline environment, 93,82% in online environment, and 80% benchmarking against human evaluation.
文本分类一直是一个重要的研究领域,它试图将文本文档分类为一组预先确定的类别。不幸的是,对印尼新闻分类的兴趣很少。本文提出了一种基于Bracewell方法的文本分类算法,该算法利用文章与类别关键词之间的似然计算。通过实验,该算法成功对印尼语新闻语料库进行分类,离线环境下准确率高达93.84%,在线环境下准确率高达93.82%,对标人类评价准确率高达80%。
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引用次数: 4
Control of TCSC and SVC using Least Square Support Vector Regression (LS-SVR) to improve voltage stability 利用最小二乘支持向量回归(LS-SVR)控制TCSC和SVC以提高电压稳定性
R. S. Wibowo, Aw Bahrowi, K. Anam, M. Abdillah, A. Soeprijanto, O. Penangsang, N. Yorino
This paper proposes the application of Least Square Support Vector Regression (LS-SVR) for controlling Flexible AC Transmission Systems (FACTS) in order to meet voltage stability requirement. Transient voltage stability is a very fast phenomenon. Therefore, the proposed approach is aimed to provide a quick response to prevent voltage collapse. Generally, time response consists of two parts. Firstly, control center receives signals from the field and then process those signals to determine the appropriate setting of FACTS devices according to load level and location of fault. Secondly, FACTS devices react based on the signals sent by control center to prevent voltage collapse. The total response time should be shorter than the time to voltage collapse. Two kinds of FACTS devices, Thyristor Controlled Series Capacitor (TCSC) and Static VAR Compensator (SVC), are used to represent series and shunt type devices, respectively. To prove the effectiveness of the proposed approach, IEEE 14 buses is used as test system. In addition, comparison study between application of LS-SVR and Extreme Learning Machine (ELM) is also presented.
本文提出将最小二乘支持向量回归(LS-SVR)应用于柔性交流输电系统的控制,以满足电压稳定的要求。暂态电压稳定是一个非常快的现象。因此,提出的方法旨在提供快速响应以防止电压崩溃。一般来说,时间响应由两部分组成。控制中心首先从现场接收信号,然后根据负载水平和故障位置对这些信号进行处理,确定FACTS设备的适当设置。其次,FACTS装置根据控制中心发出的信号作出反应,防止电压崩溃。总响应时间应短于电压崩溃的时间。两种FACTS器件,晶闸管控制串联电容器(TCSC)和静态无功补偿器(SVC),分别用于表示串联和并联型器件。为了验证该方法的有效性,采用ieee14总线作为测试系统。此外,还对LS-SVR和极限学习机(ELM)的应用进行了比较研究。
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引用次数: 0
Characteristics of electric field change preceding negative first return stroke produced by preliminary breakdown 初步击穿产生负第一回冲程前的电场变化特性
A. Hazmi, Zulka Hendri, Syaifa Mulyadi, Dasrinal Tesal, Daohong Wang, N. Takagi
Understanding the initiation process of preliminary breakdown during negative CG lightning discharges to the ground is important to design a lightning protection system. We observed electric field change preceding negative cloud to ground lightning flashes related to preliminary breakdown in tropical region, Indonesia. The characteristics of electric field change of negative first return stroke produced by preliminary breakdown process were studied. The results showed that arithmetic mean and geometric mean of pre-return stroke separation is 57 ms and 32 ms, respectively. Other statistical parameters also are shown in this paper.
了解负CG对地雷击产生初击穿的过程对防雷系统的设计具有重要意义。我们观察了印度尼西亚热带地区与初步击穿有关的负云对地闪电前的电场变化。研究了初击穿过程产生负一次回程的电场变化特性。结果表明,前回笔划分离的算术平均值为57 ms,几何平均值为32 ms。文中还给出了其他统计参数。
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引用次数: 9
Another approach to design a sinusoidal oscillator: Ensuring the oscillation stability 设计正弦波振荡器的另一种方法是:保证振荡稳定性
Dzuhri Radityo Utomo
Another approach to design a sinusoidal oscillator is proposed. This design is proposed to improve the oscillation stability of sinusoidal oscillator. The ideal model of this oscillator does not have any specific oscillation criterion. This property ensures the oscillation stability of this oscillator. Any changes in oscillation frequency does not violate the oscillation stability. This oscillator design can be implemented using op-amps and passive components. But the characteristics of op-amps influence the oscillator, thus change the characteristics of this oscillator. So a more realistic model is needed to predict the behaviour of this oscillator circuit more accurately. The realistic model is built by considering the characteristics of op-amps. Based on this model, a gain adjustment is needed by this circuit. Without any proper adjustment, a stable oscillation does not occur in this circuit. The realistic model is also used to predict the oscillation frequency of this oscillator and it produces a result that is similar to the simulation result.
提出了另一种设计正弦振荡器的方法。该设计是为了提高正弦振荡器的振荡稳定性。该振子的理想模型没有特定的振荡准则。这一性质保证了振荡器的振荡稳定性。振荡频率的任何变化都不违反振荡稳定性。这种振荡器设计可以使用运算放大器和无源元件来实现。但是运放的特性会影响振荡器,从而改变振荡器的特性。因此,需要一个更真实的模型来更准确地预测该振荡器电路的行为。考虑运算放大器的特性,建立了仿真模型。基于该模型,该电路需要进行增益调整。如果不作适当的调整,这个电路就不会产生稳定的振荡。并利用现实模型对该振荡器的振荡频率进行了预测,得到了与仿真结果相近的结果。
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引用次数: 2
Development of a conceptual model of E-commerce adoption for SMEs in Indonesia 印度尼西亚中小企业采用电子商务的概念模型的发展
Evi Triandini, A. Djunaidy, D. Siahaan
E-commerce adoption provides many benefits for small and medium enterprises. In Indonesia, adoption of e-commerce by SMEs is still in low level because they meet such several problems to adopt e-commerce as difficulty to learn and use e-commerce, to understand the role of e-commerce, etc. Based on the literature review, a conceptual model that is capable of measuring the adoption level of e-commerce is proposed. The model-that consists of both functional and non-functional requirements of an e-commerce-can be used as a framework for raising their e-commerce adoption level.
采用电子商务为中小型企业提供了许多好处。在印尼,中小企业对电子商务的接受程度还处于较低水平,因为他们在接受电子商务的过程中遇到了学习和使用电子商务的困难,不理解电子商务的作用等问题。在文献综述的基础上,提出了一个能够衡量电子商务采用水平的概念模型。该模型由电子商务的功能和非功能需求组成,可以用作提高电子商务采用水平的框架。
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引用次数: 11
Wind speed calculation by using electrical output and wind turbine power curve 利用风电输出和风力机功率曲线计算风速
A. Purwadi, M. Ikhsan, N. Hariyanto, N. Heryana, Y. Haroen
Measurements of wind speed usually done by using anemometer, these data can be used as a reference signal to the wind turbine control, or it can be used also for mapping the wind energy potential. Recently, the use of anemometer on wind turbines are often eliminated because of technical and cost reasons. This paper describes an alternative method to determine the upstream wind at the wind turbine without using the anemometer, but using only the electrical output (current and voltage) and the power curve data provided by the wind turbine manufacture. Further, the power curve is mathematically modeled by polynomial interpolation method so that the wind speed equation as a function of power can be determined.
风速的测量通常由风速计完成,这些数据可以作为风力涡轮机控制的参考信号,或者也可以用于绘制风能潜力。近年来,由于技术和成本的原因,风速计在风力涡轮机上的使用往往被淘汰。本文描述了一种不使用风速计,而仅使用风力机制造商提供的输出电流和电压以及功率曲线数据来确定风力机上游风力的替代方法。采用多项式插值法对功率曲线进行数学建模,从而确定风速作为功率的函数方程。
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引用次数: 3
The spectral and temporal description of Javanese Gong Kempul 爪哇贡贡蒲的光谱和时间描述
M. H. Budhiantho, Gunawan Dewantoro
In Central Java, the Gong Kempul is one of eminent gamelan instrument, an ensemble of predominantly struck instruments found across Central Java and has deep philosophical meaning for Javanese. However, there lack of studies concerning on this particular instrument as a bridging means between scientific description and human artistic perception. This study aims to investigate the spectral and temporal properties as well as particularly look into the typical wave-like sound of the Gong Kempul. Acoustic measurements were conducted and analyzed using ARTA. Both frequency and time domain analyses were explored to better understand the nature of the Gong Kempul. It was found that the partials at 93.8 Hz, 187.5 Hz, 281.3 Hz, and 375 Hz are the strict integer multiples of the fundamental frequency. It can also be inferred that the fundamental frequency at 93.8 Hz decays much more slowly than the other harmonic. In addition, the pitch of the Gong Kempul slide upward as the time goes on. The wave-like sound of the Gong Kempul is due to the beat phenomenon between two partials that occur closely.
在中爪哇,Gong Kempul是一种著名的佳美兰乐器,这种乐器主要是在中爪哇发现的,对爪哇人来说有着深刻的哲学意义。然而,缺乏关于这一特殊乐器作为科学描述和人类艺术感知之间桥梁手段的研究。本研究旨在研究贡贡普尔的频谱和时间特性,并特别研究典型的波状声音。利用ARTA进行了声学测量和分析。频率和时域分析都进行了探索,以更好地了解贡肯普尔的性质。结果表明,93.8 Hz、187.5 Hz、281.3 Hz和375 Hz的偏频是基频的严格整数倍。还可以推断,93.8 Hz的基频衰减速度比其他谐波慢得多。此外,锣鼓的音高随着时间的推移而上升。贡贡普尔发出的波浪般的声音是由于两个分音之间紧密发生的节拍现象。
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引用次数: 4
Dynamic response analysis of permanent magnet synchronous motor drives for city electric car 城市电动汽车用永磁同步电机驱动的动态响应分析
A. Assegaf, A. Purwadi, Y. Haroen
In the next few years, electric cars will be one of the main vehicles in transportation system and are designed to meet the requirement of high efficiency and clean energy vehicles. Since the force to propel electric vehicles comes only from electric motor, the profile of tractive effort -speed of the vehicles is determined by the torque - speed profile of the motor. The torque - speed of the electric motor consists of constant torque and constant power region, but the driving pattern in urban area has often forced the electric motor into the constant torque operation area. In this paper, the dynamic response of the PMSM under constant torque operation of city electric car is presented. The mathematical and Matlab/Simulink model of PMSM are derived and constructed, the dynamic response of the motor for city electric car under start-go mode will be obtained from simulation results. The dynamic response of torque and speed are then analyzed.
在未来几年中,电动汽车将成为交通运输系统的主要车辆之一,其设计是为了满足高效率和清洁能源汽车的要求。由于驱动电动汽车的动力仅来自电动机,因此车辆的牵引力-速度曲线由电动机的转矩-速度曲线决定。电动机的转矩-转速由恒转矩和恒功率区组成,但城市地区的驱动模式往往迫使电动机进入恒转矩运行区。本文研究了城市电动汽车恒转矩工况下永磁同步电机的动态响应。推导并建立了永磁同步电机的数学模型和Matlab/Simulink模型,通过仿真得到城市电动汽车起动-起动模式下电机的动态响应。然后分析了转矩和转速的动态响应。
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引用次数: 2
Selecting suitable solution strategies for Classes of graph coloring instances using data mining 利用数据挖掘选择适合的图着色实例类的解决策略
N. Insani, K. Smith‐Miles, Davaatseren Baatar
The Maximal Independent Set (MIS) formulation tackles the graph coloring problem (GCP) as the partitioning of vertices of a graph into a minimum number of maximal independent sets as each MIS can be assigned a unique color. Mehrotra and Trick [5] solved the MIS formulation with an exact IP approach, but they were restricted to solving smaller or easier instances. For harder instances, it might be impossible to get the optimal solution within a reasonable computation time. We develop a heuristic algorithm, hoping that we can solve these problems in more reasonable time. However, though heuristics can find a near-optimal solution extremely fast compared to the exact approaches, there is still significant variations in performance that can only be explained by the fact that certain structures or properties in graphs may be better suited to some heuristics more than others. Selecting the best algorithm on average across all instances does not help us pick the best one for a particular instance. The need to understand how the best heuristic for a particular class of instance depends on these graph properties is an important issue. In this research, we use data mining to select the best solution strategies for classes of graph coloring instances.
最大独立集(MIS)公式处理图着色问题(GCP),将图的顶点划分为最小数量的最大独立集,因为每个MIS可以分配一个唯一的颜色。Mehrotra和Trick[5]用精确的IP方法解决了MIS公式,但他们仅限于解决较小或更容易的实例。对于较困难的实例,可能不可能在合理的计算时间内得到最优解。我们开发了一种启发式算法,希望能在更合理的时间内解决这些问题。然而,尽管启发式方法可以比精确的方法更快地找到接近最优的解决方案,但仍然存在显著的性能差异,这只能解释为图形中的某些结构或属性可能比其他启发式方法更适合某些结构或属性。在所有实例中平均选择最佳算法并不能帮助我们为特定实例选择最佳算法。了解特定实例类的最佳启发式如何依赖于这些图属性是一个重要的问题。在本研究中,我们使用数据挖掘来选择图着色实例类的最佳解决策略。
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引用次数: 2
期刊
2013 International Conference on Information Technology and Electrical Engineering (ICITEE)
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