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2011 Fourth International Conference on Modeling, Simulation and Applied Optimization最新文献

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Mechanical characterization of acrylic — Emulsion polymer-modified concrete reinforced with steel fibre by Taguchi application 用田口法研究钢纤维增强丙烯酸乳液聚合物改性混凝土的力学特性
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775587
D. Hazimmah, S. Mohd
In this study, acrylic emulsion polymer as a polymeric admixture was applied in lightweight steel fibre reinforced cement concrete. The effects of curing conditions and polymer — cement ratio on the compressive and flexural strengths of acrylic emulsion polymer-modified concrete reinforced with steel fibre were investigated. Combined dry and wet curing enable to developed both the strengths of cement matrix and acrylic emulsion polymer together. Inclusion of acrylic emulsion polymer at a certain polymer-cement ratio with steel fibre as reinforcement improves the bonds between the cement matrix and steel fibre due to the acrylic emulsion polymer forms in the cement matrix. In addition, acrylic emulsion polymer modification can significantly improve the flexural strength of the normal steel fibre reinforced concrete. Compared with steel fibre reinforced concrete, the compressive strength of the acrylic emulsion polymer-modified concrete reinforced with steel fibre can increase gradually even after 28 days. The mixtures are tested, both in fresh and hardened states and to meet practical and technical requirement of SFRPMC. The results are analyzed using the Taguchi experimental design methodology. The best possible levels of mix proportions are determined for maximization through compressive strength, splitting tensile strength, flexural strength and modulus of elasticity. Analysis of variance (ANOVA) is performed on the measured data and S/N (signal to noise) ratios. A correlation derived from the results of Taguchi experimental design is proposed as a predictive equation for estimation of strength of these composites.
将丙烯酸乳液聚合物作为聚合物外加剂应用于轻钢纤维水泥混凝土中。研究了养护条件和水灰比对钢纤维增强丙烯酸乳液聚合物改性混凝土抗压强度和抗弯强度的影响。干湿复合养护使水泥基体和丙烯酸乳液聚合物的强度同时得到发挥。由于丙烯酸乳液聚合物在水泥基体中形成,以一定的聚合物-水泥比包合丙烯酸乳液聚合物,钢纤维作为增强物,改善了水泥基体与钢纤维之间的粘结。此外,丙烯酸乳液聚合物改性能显著提高普通钢纤维混凝土的抗弯强度。与钢纤维增强混凝土相比,钢纤维增强丙烯酸乳液聚合物改性混凝土的抗压强度在28天后仍能逐渐提高。在新态和硬化态下对混合料进行了测试,以满足SFRPMC的实际和技术要求。采用田口实验设计方法对实验结果进行分析。通过抗压强度、劈裂抗拉强度、弯曲强度和弹性模量来确定最佳的混合比例水平。对测量数据和信噪比进行方差分析(ANOVA)。从田口试验设计的结果中导出的相关性被提出作为估计这些复合材料强度的预测方程。
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引用次数: 0
Indoor free space optical communications for aircraft passenger cabin 飞机客舱室内自由空间光通信
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775541
M. Yousefi, S. M. Idrus, C. H. Lee, M. Arsat, A. Supa’at, N. Safri
The use of infrared radiation as a medium for high speed and short-range application is proposed for communication in the aircraft passenger cabin since it does not cause any interference to aircraft navigation systems. In this paper: first of all, using Lambert's model, the power received at the receiver via single reflection propagation inside the cabin was modeled. Then, the free space loss which depends on distance and height of transmitter and receiver from ceiling was calculated. Thirdly, in order to estimate the multipath power penalty, from the impulse response model, the delays spread dispersions and mean delays, which are related to reflection patterns and the distance between transmitter and receiver were derived and modeled. Finally, ceiling bounce model was developed to obtain the impulse response and 3dB cut off frequency. After modeling in the passenger aircraft cabin, the results are the minimum power received and the maximum bud-rate that is available to be achieved.
由于红外辐射不会对飞机导航系统造成干扰,因此提出了利用红外辐射作为高速短距离通信介质进行飞机客舱通信的方案。本文首先利用Lambert模型,对接收机在舱内单次反射传播接收到的功率进行建模。然后,根据发射机和接收机距离天花板的距离和高度,计算了自由空间损耗。第三,为了估计多径功率惩罚,从脉冲响应模型出发,导出了与反射模式和收发距离有关的时延、频散和平均时延,并对其进行了建模。最后建立了顶棚弹跳模型,得到了脉冲响应和3dB截止频率。在客机客舱进行建模后,得到的结果是接收到的最小功率和可以达到的最大出勤率。
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引用次数: 3
An ultra low voltage rail-to-rail DTMOS voltage follower 一种超低电压轨对轨DTMOS电压跟随器
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775534
Arnon Kanjanop, A. Suadet, Pratchayaporn Singhanath, Thawatchai Thongleam, Sanya Kuankid, V. Kasemsuwan
An ultra low voltage rail-to-rail DTMOS voltage follower is presented. The circuit is developed based on a complementary source follower with a common-source output stage. The circuit is designed using a 0.13 μm CMOS technology and SPICE is used to verify the circuit performance. The voltage follower can drive ± 0.25 V to the 500 Ω with the total harmonic distortion (THD) of 0.4% at the operating frequency of 1 MHz. The bandwidth and power dissipation are 288 MHz and 103 μW, respectively.
介绍了一种超低电压轨对轨DTMOS电压跟随器。该电路是基于具有共源输出级的互补源从动器开发的。该电路采用0.13 μm CMOS工艺设计,并采用SPICE对电路性能进行了验证。在工作频率为1mhz时,电压从动器可驱动±0.25 V至500 Ω,总谐波失真(THD)为0.4%。带宽为288 MHz,功耗为103 μW。
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引用次数: 6
Challenges for antisense oligonucleotide-based therapeutics, in particular for exon 51-skipping in Duchenne muscular dystrophy 以反义寡核苷酸为基础的治疗方法面临的挑战,特别是杜氏肌营养不良的51外显子跳跃
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775520
Y. Aoki, T. Nagata, Y. Shimizu, S. Takeda
Duchenne muscular dystrophy (DMD) is a lethal muscle disorder characterized by mutations in the DMD gene. These mutations primarily disrupt the reading frame, leading to an absence of functional dystrophin protein. Exon-skipping through the use of antisense oligonucleotides has served as a promising therapeutic approach for DMD, and clinical trials in DMD patients are currently underway. Recently, stable and less-toxic antisense oligonucleotides have been developed with a higher efficacy in mouse and dog models of DMD. Despite these advancements, this therapeutic approach is limited by relatively poor systemic delivery of antisense oligonucleotides to muscle, as well as toxicity effects. This review highlights the challenges for antisense oligonucleotide-based therapeutics for DMD, in particular with methods using exon 51-skipping.
杜氏肌营养不良症(DMD)是一种以DMD基因突变为特征的致死性肌肉疾病。这些突变主要破坏阅读框,导致功能性肌营养不良蛋白的缺失。利用反义寡核苷酸进行外显子跳脱是一种很有前景的DMD治疗方法,目前正在进行DMD患者的临床试验。近年来,稳定、低毒的反义寡核苷酸被开发出来,在小鼠和狗的DMD模型中具有较高的疗效。尽管取得了这些进展,但这种治疗方法受到反义寡核苷酸向肌肉的系统递送相对较差以及毒性作用的限制。这篇综述强调了基于反义寡核苷酸治疗DMD的挑战,特别是使用外显子51跳变的方法。
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引用次数: 0
Photonics alcohol detector system for Syari;ah compliance food and beverages 光子学酒精检测系统适用于Syari;ah合规食品和饮料
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775607
S. M. M. Maharom, N. Hussin, S. M. Idrus, A. Safar, N. Zulkifli
In food production, sugars (a type of carbohydrate) are widely used to make the food or beverages taste sweet and delicious. Both natural and manufactured beverages may contain a small amount of alcohol (specifically ethanol) as sugar based food is fermentable into alcohol. Therefore, Muslim consumers must be aware that the allowable percentage of alcohol to exist in the food as mentioned by the Shari'ah is only 0.01%. The main inspiration of this work is to develop a low cost yet reliable alcohol percentage detector for non-alcoholics beverages. The optical properties of beverages that respond to the infrared radiation in the optical wavelengths and frequencies range are thoroughly studied. In the proposed model, percentage of ethanol in the beverages is directly determined by using the first derivative of near-infrared (NIR) absorbance spectrum where the range of wavelength used is from 1680 nm to 1700 nm. By making suitable assumptions of the NIR technique, the alcohol detector system was designed, modeled and simulated by using Microsoft Excel and Microsoft Visual Basic. The model of the alcohol detector system was found to be practical for prototype development and hence the product would help the Muslim consumers to indentify whether the beverages they consumed Halal or not.
在食品生产中,糖(一种碳水化合物)被广泛用于使食品或饮料尝起来甜美可口。天然饮料和人造饮料都可能含有少量酒精(特别是乙醇),因为糖基食品可发酵成酒精。因此,穆斯林消费者必须知道,伊斯兰教法规定的食品中允许的酒精含量只有0.01%。本工作的主要灵感是开发一种低成本且可靠的非酒精饮料酒精百分比检测器。研究了饮料对红外辐射在波长和频率范围内的响应特性。在所提出的模型中,饮料中乙醇的百分比直接通过使用近红外(NIR)吸收光谱的一阶导数来确定,其中使用的波长范围为1680 nm至1700 nm。在对近红外技术进行适当假设的基础上,利用Microsoft Excel和Microsoft Visual Basic对酒精检测系统进行了设计、建模和仿真。酒精检测系统的模型被发现对原型开发是实用的,因此该产品将帮助穆斯林消费者识别他们喝的饮料是否清真。
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引用次数: 3
A route selection algorithm for WiMAX Mobile multi-hop relay networks WiMAX移动多跳中继网络的路由选择算法
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775619
N. Satiman, N. N. Maarof, A. Zamani, N. Fisal, S. K. S. Yusuf, S. H. Ariffin, M. Abbas
Next generation of wireless broadband network such as WiMAX MMR networks and LTE Advanced support high quality multimedia services with high data transmission rate. Most of the current broadband operates at high frequency and thus has limited transmission range. Multi-hop relaying technology is seen as an efficient solution that could enhance coverage and improves system capacity. However, overall system performances worsen as the number of hop increases. Providing efficient route selection is one of the key issues to be tackled to improve overall system performance in multi-hop relay network. In this paper, we propose route selection algorithm based on channel condition for WiMAX Mobile multi-hop relay network. We conducted simulation study to evaluate the performance of the proposed scheme.
WiMAX MMR网络和LTE Advanced等下一代无线宽带网络支持高数据传输速率的高质量多媒体业务。目前的宽带大多工作在高频上,因此传输范围有限。多跳中继技术被认为是一种有效的解决方案,可以扩大覆盖范围,提高系统容量。但是,随着跳数的增加,系统的整体性能会变差。在多跳中继网络中,提供有效的路由选择是提高系统整体性能的关键问题之一。提出了一种基于信道条件的WiMAX移动多跳中继网络路由选择算法。我们进行了仿真研究,以评估所提出方案的性能。
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引用次数: 2
Modeling and validation of brushless DC motor 无刷直流电动机建模与验证
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775620
M. S. Hussin, M. N. Azuwir, Y. N. Zaiazmin
A black box modeling for a Brushless Direct Current motor is developed and simulated based on real-time data. Taking a discrete time form for the system model, an ARX model structure was selected in this work. The real-time data acquired using a Contact Multimeter Probes via NI data acquisition system from a Brushless Direct Current motor. A Pseudo-Random Binary Sequence has been used as the input signal to determine the open-loop model of brushless motor at determined speeds. Input signal and measured data were interfaced to the plant via Matlab programming. Matlab toolbox was used to obtain the estimates model. The model validation was produced by model output plot which is comparing the input output and gives the percent best fit.
建立了一种基于实时数据的无刷直流电机黑箱模型,并进行了仿真。系统模型采用离散时间形式,采用ARX模型结构。利用接触式万用表探头通过NI数据采集系统从无刷直流电机上实时采集数据。采用伪随机二值序列作为输入信号,确定了无刷电机在一定转速下的开环模型。通过Matlab编程将输入信号和测量数据与工厂接口。利用Matlab工具箱获得估计模型。模型验证是通过模型输出图进行的,该图比较输入输出并给出最佳拟合百分比。
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引用次数: 12
Trigonometric methods as special case of exp function method 三角函数法作为exp函数法的特例
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775564
J. Biazar, Z. Ayati
In this paper, the Exp function method is compared with tanh and tanh-coth methods, to solve partial differential equations. It has been shown that the second and third methods are special cases of the first method. To illustrate and clarify the idea, exact solutions of the modified equal width wave equation are obtained by Exp function method and the results have been compared with those of tanh and tanh-coth methods.
本文将Exp函数法与tanh法和tanh-coth法进行比较,求解偏微分方程。结果表明,第二种和第三种方法是第一种方法的特例。为了说明和阐明这一思想,用Exp函数法得到了修正等宽波动方程的精确解,并与tanh法和tanh-coth法的结果进行了比较。
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引用次数: 0
Solution of advection diffusion equation using finite element method 平流扩散方程的有限元解法
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775634
S. Dhawan, S. Rawat, S. Kumar, S. Kapoor
The present paper reports the B-spline finite element method for the solution of advection-diffusion equation. The one dimensional time dependent ADV equation has been taken in to consideration with dirichlet boundary conditions. The main emphasis are given to the B-spline FEM for that some typical test examples are presented to demonstrate the performance of proposed scheme. Numerical results obtained from the present technique are found to be in good agreement with the exact solution.
本文报道了平流扩散方程的b样条有限元解法。考虑了具有狄利克雷边界条件的一维时变ADV方程。重点介绍了b样条有限元法,并给出了一些典型的试验实例来验证所提方案的性能。用该方法得到的数值结果与精确解吻合较好。
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引用次数: 4
Fast low voltage ride-through of wind generation systems using supercapacitor based energy storage systems 使用基于超级电容器的储能系统的风力发电系统的快速低压穿越
Pub Date : 2011-04-19 DOI: 10.1109/ICMSAO.2011.5775633
A. Rahim, M. Alam
Dynamic model of a wind generation system with a supercapacitor based energy storage system is developed. The supercapacitor system has been interfaced with the wind generation system through a STATCOM. Decoupled P-Q control of STATCOM is implemented by introducing suitable transformation on its injected current. The controller parameters are obtained through a search based optimization technique. The effectiveness of the STATCOM supercapacitor energy storage was examined for very low voltage situations. Simulation studies demonstrated that the STATCOM supercapacitor control can achieve significant withstand capability for reasonable low voltage duration. System transients are adequately suppressed and normal conditions are quickly restored.
建立了基于超级电容器储能系统的风力发电系统的动态模型。该超级电容器系统通过STATCOM与风力发电系统连接。通过对注入电流进行适当的变换,实现了STATCOM的P-Q解耦控制。通过基于搜索的优化技术获得控制器参数。研究了STATCOM超级电容器在极低电压条件下储能的有效性。仿真研究表明,STATCOM超级电容器控制可以在合理的低电压持续时间内获得显著的耐压能力。系统瞬态得到充分抑制,并迅速恢复正常状态。
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引用次数: 9
期刊
2011 Fourth International Conference on Modeling, Simulation and Applied Optimization
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