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Tool wear evaluation on rubberized fly ash geopolymer milling 含胶粉煤灰地聚合物铣削刀具磨损评价
Pub Date : 2019-07-30 DOI: 10.1063/1.5118193
T. Yu, M. Fathullah, M. Abdullah, Z. Shayfull, F. Tahir
Geopolymer is a new type of sustainable material which is produced by using industrial by-product. Recent articles showed that geopolymer materials have good machining property. However, the machining optimization only covered on natural fly ash geopolymer by using turning operation. Besides, the rubberised fly ash geopolymer (RFAG) has not been well investigated. Therefore, new research about machining on RFAG is needed to be carried out.
地聚合物是利用工业副产品生产的一种新型可持续材料。近年来的研究表明,地聚合物材料具有良好的加工性能。然而,仅对天然粉煤灰地聚合物进行车削加工优化。此外,橡胶粉煤灰地聚合物(RFAG)还没有得到很好的研究。因此,需要对RFAG的加工进行新的研究。
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引用次数: 1
Causes of construction delay for housing projects in Malaysia 马来西亚住宅项目施工延误的原因
Pub Date : 2019-07-30 DOI: 10.1063/1.5118038
M. Z. Ramli, A. Nordin, Nursyadzatul Tasnim Roslin, N. B. Hamid, N. S. Azman, N. Zahari
Every organization that is involved with the construction industry undoubtedly has delayed progress at some phase in their project or development. Delay in construction project become a common situ...
毫无疑问,每一个与建筑行业有关的组织都在其项目或发展的某个阶段推迟了进度。施工项目延误成为常见的现场问题。
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引用次数: 1
Investigation of the effectiveness of water hyacinth as floating wetland plant on treating the nutrient pollutants 水葫芦作为漂浮湿地植物处理营养性污染物的效果研究
Pub Date : 2019-07-30 DOI: 10.1063/1.5118036
M. F. Chow, V. Santhiran, H. Haris
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引用次数: 1
Induction motor rotor: Energy efficiency improvement on economic and environment 感应电机转子:经济环保的能效提升
Pub Date : 2019-07-30 DOI: 10.1063/1.5118060
M. K. Rahmat, Y. Yahya, Kadhim H. Suffer
Nowsday, the induction motor is currently he most exploited machine for industrial motor global. Its ease of use, self-starting, small in size, light in weight, high efficiency, less maintenance and cheap per same power rating which usually met the required characteristics for industry as attract its application in industry. It is presented from small horse-power up to thousands of horse-power. Induction motor was employed in application such as small pumps, conveyors, drilling machines, fans, blowers and escalators. The increment in energy efficiency was investigated using copper for rotor bar slots. Normally, the copper losses in rotor part of induction motor is contributing to the energy losses. The work proposed a new design for the rotor part, with modified rotor bar type, bar size and rotor bar design. This work has been investigated using two methods, specifically, MotorSolve (IM) software and theoretically calculation. A set of simulation was showed the significant improvement in the energy efficiency for the new design. The theoretical calculation utilised MATLAB simulations. The comparison on efficiency between the existing design and the proposed new design was carried out using MotorSolve (IM) simulation. The result showed that the proposed new design was increased energy efficiency of 76.92% as compared to exiting design of 74%. The result was proven using MATLAB. For energy and cost saving, a new design rotor was saved 154kWh/year and utility bills of RM60.20/year for each motor. Lastly, a cost estimate for 100,000 pieces of induction motor with a new rotor bar type design is presumed and shows the value was saved nearly RM6.02million.Nowsday, the induction motor is currently he most exploited machine for industrial motor global. Its ease of use, self-starting, small in size, light in weight, high efficiency, less maintenance and cheap per same power rating which usually met the required characteristics for industry as attract its application in industry. It is presented from small horse-power up to thousands of horse-power. Induction motor was employed in application such as small pumps, conveyors, drilling machines, fans, blowers and escalators. The increment in energy efficiency was investigated using copper for rotor bar slots. Normally, the copper losses in rotor part of induction motor is contributing to the energy losses. The work proposed a new design for the rotor part, with modified rotor bar type, bar size and rotor bar design. This work has been investigated using two methods, specifically, MotorSolve (IM) software and theoretically calculation. A set of simulation was showed the significant improvement in the energy effici...
感应电机是目前全球工业电机开发最多的一种电机。它具有使用方便、自启动、体积小、重量轻、效率高、维修少、价格便宜等特点,在相同的额定功率下通常能满足工业需要,从而吸引了它在工业上的应用。从小马力到几千马力都有。感应电动机应用于小型泵、输送机、钻机、风机、鼓风机和自动扶梯等领域。研究了采用铜作为转子棒槽的节能效果。通常情况下,异步电动机转子部分的铜损耗是造成能量损耗的原因之一。对转子部分进行了新的设计,改进了转子棒的类型、尺寸和转子棒的设计。这项工作已经研究了两种方法,具体来说,MotorSolve (IM)软件和理论计算。一组仿真结果表明,新设计在能源效率方面有显著提高。理论计算采用MATLAB仿真。利用MotorSolve (IM)仿真软件对现有设计和提出的新设计进行了效率比较。结果表明,与现有设计的74%相比,新设计的能效提高了76.92%。用MATLAB对结果进行了验证。在能源和成本方面,新设计转子每年节省154kWh,每台电机每年节省60.20令吉的水电费。最后,预计10万件采用新型转子棒型设计的感应电机的成本估计,显示节省了近602万令吉的价值。感应电机是目前全球工业电机开发最多的一种电机。它具有使用方便、自启动、体积小、重量轻、效率高、维修少、价格便宜等特点,在相同的额定功率下通常能满足工业需要,从而吸引了它在工业上的应用。从小马力到几千马力都有。感应电动机应用于小型泵、输送机、钻机、风机、鼓风机和自动扶梯等领域。研究了采用铜作为转子棒槽的节能效果。通常情况下,异步电动机转子部分的铜损耗是造成能量损耗的原因之一。对转子部分进行了新的设计,改进了转子棒的类型、尺寸和转子棒的设计。这项工作已经研究了两种方法,具体来说,MotorSolve (IM)软件和理论计算。一组仿真结果表明,该方法显著提高了能效。
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引用次数: 0
On the ultra-fast ion induced demagnetization in thin films 超高速离子诱导薄膜退磁的研究
Pub Date : 2019-07-29 DOI: 10.1063/1.5119474
T. Iliť, P. Valko, M. Drzik, M. Marton, M. Behúl, M. Vojs
In this paper we discuss ion-induced ultra fast demagnetization and present an approach for experimental investigation of the following magnetization dynamics. The effect, if confirmed, might have applications in spintronics, micro-scale power generation or communication and for basic research in the area of ion track formation as a mean to observe thermodynamics in ion tracks. The proposed approach lies in using magnetic antenna for detection of the field change induced by ion stopping and converting the field change to electrical signal. The approach was confirmed feasible, providing temporal resolution below 100ps in tests with other fast impulse heat source – a femtosecond laser. Presented experimental results and simulations based on ion-induced thermal spike model show a necessity to develop broadband antennas with high sensitivity and micro-scale dimensions together with specialized high frequency amplifier electronics, in order to allow observation of ultra-fast ion-induced demagnetization.
本文讨论了离子诱导的超快速退磁,并提出了一种后续磁化动力学实验研究的方法。如果得到证实,这一效应可能会应用于自旋电子学、微尺度发电或通信,以及离子轨道形成领域的基础研究,作为观察离子轨道热力学的一种手段。该方法是利用磁天线探测离子停止引起的场变化,并将场变化转化为电信号。该方法被证实是可行的,在使用其他快速脉冲热源——飞秒激光器的测试中,提供了低于100ps的时间分辨率。基于离子诱导热尖峰模型的实验结果和模拟表明,为了观察超高速离子诱导退磁,有必要开发高灵敏度和微尺度的宽带天线以及专门的高频放大器电子器件。
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引用次数: 0
Progress in development of Jiles-Atherton model of magnetic hysteresis 磁滞的Jiles-Atherton模型的研究进展
Pub Date : 2019-07-29 DOI: 10.1063/1.5119498
R. Szewczyk
Paper presents the review of recent advances in development of Jiles-Atherton model. Solutions of anhysteretic curve considering uniaxial and grain-oriented anisotropy are presented. Moreover, different concepts of differential equations stating magnetic hysteresis are explained. Finally, problems connected with solving ordinary differential equations, stability, and parameters identification are briefly elaborated. On the base of presented advances in model development, issues connected with interaction of anisotropy energies as well as stability criteria are identified, as a key barriers creating difficulties for understanding the principles of magnetization process and efficient application of Jiles-Atherton model for modelling inductive components with cores made of soft magnetic materials.Paper presents the review of recent advances in development of Jiles-Atherton model. Solutions of anhysteretic curve considering uniaxial and grain-oriented anisotropy are presented. Moreover, different concepts of differential equations stating magnetic hysteresis are explained. Finally, problems connected with solving ordinary differential equations, stability, and parameters identification are briefly elaborated. On the base of presented advances in model development, issues connected with interaction of anisotropy energies as well as stability criteria are identified, as a key barriers creating difficulties for understanding the principles of magnetization process and efficient application of Jiles-Atherton model for modelling inductive components with cores made of soft magnetic materials.
本文综述了近年来吉尔斯-阿瑟顿模型的发展进展。给出了考虑单轴和晶粒取向各向异性的非迟滞曲线解。此外,还解释了说明磁滞的微分方程的不同概念。最后简要阐述了常微分方程求解、稳定性和参数辨识等问题。在模型发展的基础上,确定了与各向异性能量相互作用以及稳定性准则相关的问题,这是理解磁化过程原理和有效应用Jiles-Atherton模型对软磁材料磁芯电感元件建模的关键障碍。本文综述了近年来吉尔斯-阿瑟顿模型的发展进展。给出了考虑单轴和晶粒取向各向异性的非迟滞曲线解。此外,还解释了说明磁滞的微分方程的不同概念。最后简要阐述了常微分方程求解、稳定性和参数辨识等问题。在模型发展的基础上,确定了与各向异性能量相互作用以及稳定性准则相关的问题,这是理解磁化过程原理和有效应用Jiles-Atherton模型对软磁材料磁芯电感元件建模的关键障碍。
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引用次数: 2
Preparation of Fe-impregnated sepiolite catalytic layers for synthesis of carbon nanotube nanocomposites 碳纳米管纳米复合材料中铁浸渍海泡石催化层的制备
Pub Date : 2019-07-29 DOI: 10.1063/1.5119477
M. Kadlecíková, J. Breza, K. Jesenák, M. Mikolasek, Ľ. Vančo, A. Grmanová, J. Racko
This experimental work is focused on the catalyst films – their chemical composition, preparation and catalytic activity (in terms of the amount of CNTs produced) in the process of synthesis of carbon nanotubes using hot filament chemical vapor deposition. The series of experiments was devoted to the selection of methods for preparation and characterization of films and nanocomposites. The prepared nanocomposites based on carbon nanotubes and iron modified mineral fractions were evaluated by electron microscopy and Raman spectroscopy.This experimental work is focused on the catalyst films – their chemical composition, preparation and catalytic activity (in terms of the amount of CNTs produced) in the process of synthesis of carbon nanotubes using hot filament chemical vapor deposition. The series of experiments was devoted to the selection of methods for preparation and characterization of films and nanocomposites. The prepared nanocomposites based on carbon nanotubes and iron modified mineral fractions were evaluated by electron microscopy and Raman spectroscopy.
本实验主要研究了采用热丝化学气相沉积法合成碳纳米管过程中催化剂膜的化学组成、制备和催化活性(以产生的碳纳米管数量计)。该系列实验致力于薄膜和纳米复合材料制备和表征方法的选择。利用电子显微镜和拉曼光谱对碳纳米管和铁改性矿物组分制备的纳米复合材料进行了表征。本实验主要研究了采用热丝化学气相沉积法合成碳纳米管过程中催化剂膜的化学组成、制备和催化活性(以产生的碳纳米管数量计)。该系列实验致力于薄膜和纳米复合材料制备和表征方法的选择。利用电子显微镜和拉曼光谱对碳纳米管和铁改性矿物组分制备的纳米复合材料进行了表征。
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引用次数: 1
Non-linear thermoelastic analysis of the nylon actuator 尼龙作动器的非线性热弹性分析
Pub Date : 2019-07-29 DOI: 10.1063/1.5119483
J. Murín, M. Minar, P. Melek, V. Goga, V. Kutǐs, Juraj Paulech
A new actuator, consisting of two nylon springs, is designed in a form of the von Mises truss system. The nylon spring (an artificial muscle) is produced by twisting of the nylon line. As a result of the twisting into the prestressed spring, a new microstructure of the fibre has been formed. The spring, after its mechanical elongation, exhibits a negative temperature expansion after its warming. This is the main advantage for the practical applications. The heating of the actuator is realized by the electric wire, which is wound on the nylon springs. Semi analytical and numerical methods are used for geometric non-linear thermo elastic analysis of the actuator to obtain its deformation caused by the electro-thermo-mechanical loads. The calculated results are verified by the measurement on the real model. A very good agreement of both the results is obtained.A new actuator, consisting of two nylon springs, is designed in a form of the von Mises truss system. The nylon spring (an artificial muscle) is produced by twisting of the nylon line. As a result of the twisting into the prestressed spring, a new microstructure of the fibre has been formed. The spring, after its mechanical elongation, exhibits a negative temperature expansion after its warming. This is the main advantage for the practical applications. The heating of the actuator is realized by the electric wire, which is wound on the nylon springs. Semi analytical and numerical methods are used for geometric non-linear thermo elastic analysis of the actuator to obtain its deformation caused by the electro-thermo-mechanical loads. The calculated results are verified by the measurement on the real model. A very good agreement of both the results is obtained.
一个新的驱动器,由两个尼龙弹簧,设计在一个形式的冯米塞斯桁架系统。尼龙弹簧(一种人造肌肉)是通过扭转尼龙线产生的。由于扭转进入预应力弹簧,纤维形成了新的微观结构。弹簧经过机械伸长后,加温后表现为负的温度膨胀。这是实际应用的主要优势。执行器的加热是通过缠绕在尼龙弹簧上的电线来实现的。采用半解析和数值方法对作动器进行几何非线性热弹性分析,得到其在电-热-机械载荷作用下的变形。通过对实际模型的测量,验证了计算结果。两者的结果非常吻合。一个新的驱动器,由两个尼龙弹簧,设计在一个形式的冯米塞斯桁架系统。尼龙弹簧(一种人造肌肉)是通过扭转尼龙线产生的。由于扭转进入预应力弹簧,纤维形成了新的微观结构。弹簧经过机械伸长后,加温后表现为负的温度膨胀。这是实际应用的主要优势。执行器的加热是通过缠绕在尼龙弹簧上的电线来实现的。采用半解析和数值方法对作动器进行几何非线性热弹性分析,得到其在电-热-机械载荷作用下的变形。通过对实际模型的测量,验证了计算结果。两者的结果非常吻合。
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引用次数: 0
Relative Seebeck coefficient differences used for metal sorting 用于金属分选的相对塞贝克系数差
Pub Date : 2019-07-29 DOI: 10.1063/1.5119486
M. Nowicki, B. Lewandowska
This paper is concerned with improving the accuracy of thermoelectric NDT distinguishing between metals and alloys of different composition. While the thermoelectric alloy sorters are known for decades, they generally depend only on thermoelectric voltage differences between samples of different materials, and standard samples for comparisons. In the presented approach, relative Seebeck coefficient is calculated in real time in order to raise the sorting resolution capability. This solution virtually eliminates the problem connected with temperature instability of the hot probe. The experimental test stand consisted of heated probe, two millivoltmeters and a PC with custom LabView processing software. The effectiveness of sample identification was verified in the blind test on example of metallic amorphous ribbons indistinguishable for the naked eye.This paper is concerned with improving the accuracy of thermoelectric NDT distinguishing between metals and alloys of different composition. While the thermoelectric alloy sorters are known for decades, they generally depend only on thermoelectric voltage differences between samples of different materials, and standard samples for comparisons. In the presented approach, relative Seebeck coefficient is calculated in real time in order to raise the sorting resolution capability. This solution virtually eliminates the problem connected with temperature instability of the hot probe. The experimental test stand consisted of heated probe, two millivoltmeters and a PC with custom LabView processing software. The effectiveness of sample identification was verified in the blind test on example of metallic amorphous ribbons indistinguishable for the naked eye.
本文研究了如何提高热电无损检测技术对不同成分金属和合金的检测精度。虽然热电合金分选器已经存在了几十年,但它们通常只依赖于不同材料样品之间的热电电压差异,以及用于比较的标准样品。在该方法中,实时计算相对塞贝克系数,以提高分选分辨率。这种解决方案实际上消除了与热探头温度不稳定有关的问题。实验试验台由加热探头、两个毫伏计和一台装有定制LabView处理软件的PC机组成。通过对肉眼无法分辨的金属无定形带样品进行盲测,验证了该方法的有效性。本文研究了如何提高热电无损检测技术对不同成分金属和合金的检测精度。虽然热电合金分选器已经存在了几十年,但它们通常只依赖于不同材料样品之间的热电电压差异,以及用于比较的标准样品。在该方法中,实时计算相对塞贝克系数,以提高分选分辨率。这种解决方案实际上消除了与热探头温度不稳定有关的问题。实验试验台由加热探头、两个毫伏计和一台装有定制LabView处理软件的PC机组成。通过对肉眼无法分辨的金属无定形带样品进行盲测,验证了该方法的有效性。
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引用次数: 1
Design of polymer based 8-channel, 100-GHz AWG applying various photonics tools 基于聚合物的8通道100 ghz AWG设计,应用各种光子学工具
Pub Date : 2019-07-29 DOI: 10.1063/1.5119493
D. Seyringer, L. Gajdošová, P. Gašo, D. Pudiš
We present design and simulation of polymer based 8-channel, 100-GHz AWG, designed for central wavelength of 1550 nm. The input design parameters were calculated applying AWG-Parameters tool. The AWG layout was created and the simulations were performed applying commercial photonic tool PHASAR from Optiwave. The achieved transmission characteristics were evaluated by AWG-Analyzer tool. The achieved simulation results confirm a very good agreement between the designed and simulated transmission parameters.
提出了基于聚合物的8通道100 ghz AWG的设计和仿真,设计的中心波长为1550 nm。采用AWG-Parameters工具计算输入的设计参数。建立了AWG布局,并利用Optiwave的商用光子工具PHASAR进行了仿真。采用AWG-Analyzer工具对所得透射特性进行评价。仿真结果表明,设计的传动参数与仿真的传动参数吻合良好。
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引用次数: 0
期刊
APPLIED PHYSICS OF CONDENSED MATTER (APCOM 2019)
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