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2010 International Conference on Mechanical and Electrical Technology最新文献

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Studying the nano structures of Titanium dioxide multilayer produced with gold nano particles depletion in extreme vacuum condition 研究了在极端真空条件下用金纳米粒子耗尽制备二氧化钛多层膜的纳米结构
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598435
H. Kangarlou, S. Rafizadeh
In this article, nano layers of Titanium dioxide initially were prepared through evaporation in extreme vacuum (HV) condition on glassy substrate, in a temperature of 100° Celsius exposed from three different angels with 90 nanometers thickness. Then the nano particles of pure gold were accumulated vertically on the layers. The layer depletion situation was the same for all of the layers used in the experiment. The nano structures of these layers will be analyzed in different analytical ways using Atomic Power Microscope, Electronic microscope and Spectrophotometer. The aim of this experiment and observation is essentially to find out the relationship between nano structures of layers and the accumulation condition in extreme vacuum condition and also to observe and analyze how the nano particles of gold settle on the layers in such conditions. The results is quite satisfactory and promising.
本文首先在玻璃基板上,通过极真空(HV)条件下的蒸发,在100摄氏度的温度下,从三个不同的角度暴露90纳米厚度的二氧化钛纳米层。然后将纯金纳米颗粒垂直堆积在层上。在实验中使用的所有层的层耗尽情况是相同的。利用原子显微镜、电子显微镜和分光光度计对这些层的纳米结构进行分析。本实验和观察的主要目的是找出在极端真空条件下,层的纳米结构与堆积条件之间的关系,并观察和分析在这种条件下,金的纳米颗粒是如何沉积在层上的。结果是令人满意和有希望的。
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引用次数: 0
Nasal cavity temperature measurement for non-invasive respiratory rhythm monitoring and its interfacing with computer 无创呼吸节律监测的鼻腔温度测量及其与计算机的接口
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598470
P. Sandhu, Kulvinder Singh Mann, Ravikant Verma, Ekta Gupta
Traditionally monitoring systems for respiratory care are classified into invasive and non-invasive methods. The former refer to measurement systems that penetrate the body, while the latter consider the systems that rest on the skin or those using samples of inspired or expired gases[10]. Among the so called non invasive techniques this technique is based on the measure of temperature at the patients airway. It is usually used in intubated patients, or applied in its modified version using a nasal cannula for non intubated patients. The method measures the temperature changes in the inhalation-exhalation cycle. In this method efficiency is limited since humidity, secretions and other factors distort the resulting signal. Other methods measuring the patient's CO2 in/out flow are based on Capnography, using a Capnographic sensor. The method measures the CO2 at the patients airway.
传统的呼吸保健监测系统分为侵入性和非侵入性方法。前者指的是穿透人体的测量系统,而后者考虑的是停留在皮肤上或使用吸入或过期气体样本的系统[10]。在所谓的非侵入性技术中,这种技术是基于对患者气道温度的测量。它通常用于插管患者,或在其改良版本中使用鼻插管用于非插管患者。该方法测量吸入-呼出循环中的温度变化。在这种方法中,由于湿度、分泌物和其他因素会扭曲产生的信号,因此效率受到限制。其他测量患者二氧化碳进出量的方法是基于二氧化碳描记术,使用二氧化碳描记传感器。该方法测量患者气道的二氧化碳。
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引用次数: 0
A new dynamic modeling approach to fixed joint interface in machine tools 机床固定关节界面的一种新的动态建模方法
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598455
Hongliang Tian, Bin Li, Hongqi Liu, Kuanmin Mao, Peihua Gu
The concept of virtual material was presented for the first time when the flexible joint interface may be considered as a virtual material with the same cross area. The virtual material is rigidly connected with two components situated in both sides of flexible joint interface. By adding an element, a complicated assembled part including a joint interface could be equaled as a simple component without any joint interface in order to simplify the complicated problem about flexible joint interface. A series of exact analytical solutions of elastic modulus, shear modulus, Poisson ratio and density were deduced from virtual material by introducing Hertz contact theory and fractal theory. The virtual material model vibration shapes are in excellent agreement with the experimental results.
首次提出了虚拟材料的概念,将柔性关节界面视为具有相同交叉面积的虚拟材料。虚拟材料与位于柔性接头界面两侧的两个构件进行刚性连接。通过增加单元,将包含关节接口的复杂装配件等效为不含关节接口的简单构件,从而简化了复杂的柔性关节接口问题。引入赫兹接触理论和分形理论,导出了虚拟材料弹性模量、剪切模量、泊松比和密度的一系列精确解析解。虚拟材料模型的振动形态与实验结果吻合良好。
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引用次数: 5
Pattern recognition method for detecting fault in EHV transmission lines 超高压输电线路故障检测的模式识别方法
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598483
Abhijit A. Dutta, A. Kadu
This paper presents a new approach for detecting and locating faults on an EHV transmission line using the method of pattern recognition. This technique of recognizing the waveform patterns can differentiate the fault condition with normal condition. A fault must be detected at its inception and issuing an output signal indicating this condition. Our approach is based on the fact that whenever fault occurs in any of the phases of transmission lines the impedance drops and current in the faulted phase rises. ANN backpropagation algorithm is used for training purpose, the learning process trained and tested a data set of several types of fault, the proposed method of detecting and locating faults gives great results which can support a new generation of very high speed protective relaying system.
提出了一种基于模式识别的超高压输电线路故障检测与定位新方法。这种波形模式识别技术可以区分故障状态和正常状态。必须在一开始就检测到故障,并发出指示这种情况的输出信号。我们的方法是基于这样一个事实,即无论何时在传输线的任何相位发生故障,故障相位的阻抗都会下降,电流会上升。采用神经网络反向传播算法进行训练,在学习过程中训练并测试了几种类型故障的数据集,所提出的故障检测和定位方法取得了很好的效果,可以支持新一代超高速保护继电保护系统。
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引用次数: 7
Experiment study on the heat transfer coefficient of evaporative flow in mini/microchannels 小/微通道蒸发流换热系数的实验研究
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598380
Dongyao Liu, X. Weng, Xiaoguang Xu
The heat transfer coefficients of the evaporative water flow in mini/microchannels are studied experimentally to explore the novel heat dissipation for high power electronics. Two sets of parallel channels which are 61 channels with hydraulic diameter of 0.293mm and 20 channels with hydraulic diameter of 1.2mm are investigated respectively. The inlet and outlet temperatures of fluids, and the temperatures beneath the channels are measured to calculate the heat dissipation of the evaporative water in channels. The experiments are carried out with the volume flow rates range from 20ml/min to 80ml/min and the effective heat flux range from 5W/cm2 to 50W/cm2, and the resulted outlet vapor qualities range from 0 to 0.8. The relations of the heat transfer coefficient with heat flux and vapor quality are analyzed according to the results. The experimental heat transfer coefficients are compared with the prediction of latest developed correlations. A new correlation takes the effect of Bond number is proposed, and be verified that it is effective to predict the heat transfer coefficient of both minichannels and microchannels in a large range of vapor qualities.
为探索大功率电子器件的新型散热方式,通过实验研究了蒸发水流在微型/微通道中的传热系数。研究了水工径为0.293mm的61条水工径和水工径为1.2mm的20条水工径两组平行水工径。通过测量流体的入口和出口温度以及通道下的温度来计算通道内蒸发水的散热。在体积流量为20ml/min ~ 80ml/min,有效热流密度为5W/cm2 ~ 50W/cm2的条件下进行实验,得到的出口蒸汽质量为0 ~ 0.8。根据计算结果,分析了换热系数与热流密度和蒸汽质量的关系。将实验换热系数与最新发展的关系式预测结果进行了比较。提出了一种新的受键数影响的关系式,并验证了该关系式在较大汽质范围内对小通道和微通道换热系数的预测是有效的。
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引用次数: 0
The power dissipation comparison of different ALU architectures 不同ALU架构的功耗比较
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598395
Junkai Sun, Anping Jiang
Low power is a challenging work in processor design. Implementing power optimization on all components of the processor is a choice. One of the most basic components in processor is the Arithmetic and Logic Unit (ALU), which performs arithmetic operations and logic operations. The architecture of ALU has several implications on power consumption, delay and area. In this paper, different ALU architectures are described and discussed. To find out which ALU architecture provides the best power efficiency, an 8-bit ALU of the different architectures is designed. Compared with other architectures, the power savings of the most power effective architecture range from 19.38% to 33.87%. At the same time, the corresponding area savings range from 56.37% to 14.92%.
低功耗是处理器设计中一项具有挑战性的工作。在处理器的所有组件上实现电源优化是一种选择。处理器中最基本的部件之一是算术逻辑单元(ALU),它执行算术运算和逻辑运算。ALU的结构在功耗、延迟和面积等方面具有重要意义。本文对不同的ALU体系结构进行了描述和讨论。为了找出哪种ALU架构提供最佳的电源效率,设计了一个不同架构的8位ALU。与其他架构相比,最节能的架构的节能幅度在19.38% ~ 33.87%之间。同时,相应的面积节约范围为56.37% ~ 14.92%。
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引用次数: 4
A new approach in intelligent trailer parking 一种智能挂车停车新方法
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598387
A. Zare, M. Sharafi, A. Kamyad
in this article a new approach for parking the trailer was suggested, using fuzzy ration in a dynamic environment. This method, contrasting with previous methods, in which only the trailer's backward movement was allowed, the capability of forward movement to find the optimal path beside backward movement exists. Sometimes the angel of the trailer's position may be in a way that the possibility of backward movement does not exist. In this article, three separate fuzzy controllers were used for directing the trailer; one is used for forward movement realization in order to stop crashing with the used walls, which organize the forward movement, the second controller is for finding the target, and the third for staying away from the obstacles. In the first case, obstacles are assumed to be fixed, while the second condition includes moving obstacles through which the trailer should be directed toward the parking dock. The method is designed in a way to be used in conditions with infinite number of obstacles at arbitrary places. In any case, to find the parking dock, the trailer movement must be adapted to that of obstacles. While there is no obstacle around, the target finder controller is in use; and in the cases where the trailer gets close to obstacles the obstacle avoider controller is activated. The proposed method is employed for parking a trailer model through fixed and moving obstacles.
本文提出了一种动态环境下模糊定量停放拖车的新方法。与以往只允许拖车向后移动的方法相比,该方法存在着向前移动找到最优路径的能力。有时拖车的角度可能在某种程度上不存在向后移动的可能性。在本文中,使用三个独立的模糊控制器来指导拖车;一个用于向前运动的实现,以停止与使用过的墙壁碰撞,组织向前运动,第二个控制器用于寻找目标,第三个控制器用于远离障碍物。在第一种情况下,假设障碍物是固定的,而第二种情况包括移动的障碍物,拖车应该通过这些障碍物朝向停车场。该方法被设计成在任意位置有无限数量障碍物的情况下使用。在任何情况下,为了找到停车码头,拖车的运动必须适应障碍物的运动。当周围没有障碍物时,目标查找器控制器正在使用中;在拖车靠近障碍物的情况下避障控制器被激活。将所提出的方法用于拖车模型通过固定和移动障碍物的停车。
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引用次数: 1
The structural optimization of Pt-C high temperature fixed-point crucible Pt-C高温定点坩埚的结构优化
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598458
Wang Hua, L. Fei, Wang tie jun, Dong Wei
In this paper, by using the finite element analysis software—ANSYS and the direct coupling method, the stress of platinum-carbon (Pt-C) high temperature fixed-point crucible during phase transition process was analyzed. The stress profile of the crucible was identified through the stress diagram analysis. From analyzing the stress diagram, we recommend a novel optimal hybrid crucible structure. Again we use ANSYS to analyze the stress profile of the improved crucible. A better robustness for the hybrid structure can be obtained from the ANSYS calculation.
本文采用有限元分析软件ansys和直接耦合法,对铂碳(Pt-C)高温定点坩埚在相变过程中的应力进行了分析。通过应力图分析,确定了坩埚的应力分布。通过对应力场图的分析,提出了一种新型的混合坩埚结构。再次利用ANSYS软件对改进后的坩埚进行了应力分析。ANSYS计算结果表明,该结构具有较好的鲁棒性。
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引用次数: 0
I-superior approach to study the stability of logistic map logistic映射稳定性研究的I-superior方法
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598469
M. Rani, Saurabh Goel
Verlhust logistic map f(x) = r x (1 − x) is a widely studied and applicable model in discrete dynamical system. Its behavior has been, extensively, studied in Picard orbit and recently studied in superior orbit. Rani et. al. [22] and [25] has shown that in superior orbit, logistic map is stable for larger values of r than that of Picard orbit. In this paper, we have attempted to make the map stable for further larger values of r via I-superior iterates.
Verlhust logistic映射f(x) = r x(1−x)是离散动力系统中一个被广泛研究和应用的模型。它的行为已经在皮卡德轨道上进行了广泛的研究,最近在上轨道上进行了研究。Rani et al.[22]和[25]已经表明,在优越轨道上,逻辑映射在r值较大时比皮卡德轨道稳定。在本文中,我们试图通过I-superior迭代使映射在更大的r值下保持稳定。
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引用次数: 3
Computation of aerodynamic performance about a swept wing with simulated rime ice accretion 模拟浮冰增积后掠翼气动性能计算
Pub Date : 2010-10-07 DOI: 10.1109/ICMET.2010.5598489
Aung Ko Wynn, Cao Yi Hua
This paper deals with the computational studies carried out on the aircraft swept wing with and without a simulated 5 minutes rime ice accretion at subsonic Mach number conditions. The aerodynamic performances changes of lift coefficients, drag coefficients and pressure coefficients were evaluated. The computations were carried out at Mach number 0.4758 with Reynolds number 5.61×106 conditions to obtain the flow field around the aircraft swept wing with and without a simulated 5 minutes rime ice accretion. The aircraft wing with rime ice shape was extended across the entire span of the wing. The aerodynamic performance of the aircraft swept wing with and without ice accretion on the angle of attack range −2 to 16 degrees has also been investigated. This computational study is based on the commercial Fluent 6.3.26 code, was used for solving the set of governing equations using the one equation Spalart-Allmaras(S-A) turbulence model and second order upwind differencing. The CFD computation can also accurately predict the aerodynamic performance changes of lift and drag coefficients until up to stall.
本文讨论了在亚音速马赫数条件下,对飞机后掠翼进行了模拟和不模拟5分钟时间冰积累的计算研究。评估了升力系数、阻力系数和压力系数的气动性能变化。在马赫数为0.4758、雷诺数为5.61×106的条件下进行计算,得到了模拟5分钟时间积冰情况下和不考虑情况下飞机后掠翼周围的流场。飞机的机翼呈冰状,延伸到机翼的整个跨度。在迎角- 2 ~ 16度范围内,研究了飞机后掠翼在有冰和没有冰的情况下的气动性能。本计算研究基于商用Fluent 6.3.26代码,采用单方程Spalart-Allmaras(S-A)湍流模型和二阶迎风差分求解一组控制方程。CFD计算还可以准确预测到失速前升力和阻力系数的气动性能变化。
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引用次数: 1
期刊
2010 International Conference on Mechanical and Electrical Technology
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