作者没有确认。

1.预测试准备<ol><li>设计和制造测试夹具。设计夹具通过选择螺栓位置以匹配叶片的安装位置到复制现实边界条件。选择钢夹具，以尽量减少从夹具到试样的动态响应的贡献。 <ol><li>博尔特刀片的定制T支架。 </li><li>夹紧固定到钢表。 </li></ol></li><li>识别和标记撞击位置的网格。 <ol><li>选择30个点，涵盖了整个叶片。 </li><li>标志点用记号笔或蜡笔和数量，以供参考。使用在结果可视化表示以后使用卷尺测量点间距。 </li></ol></li><li>选择和校准加速度计。 <ol><li>选择单一轴，为10 mV / g加速度计。一定要选择具有适当的灵敏度加速度计，以避免过载传感器，并实现良好的信噪比-noise比率。此外，一定的传感器的频率范围是足以捕获的为试样感兴趣的频率范围。 </li><li>校准每个传感器。 <ol><li>附加传感器的手持式振动器，其输出是9.81米/秒2有效值（ 即 ，1克）的大小的单一频率的力。 </li><li>测量2秒的响应。 </li><li>确定从软件读出响应的幅值的均方根值。 </li><li>由1000乘以均方根值，以确定在毫伏/ g的单位加速度计的校准因子。 </li></ol></li></ol></li><li>选择到锤尖。 <ol><li>选择11.2毫伏/ N灵敏度的冲击锤。一定要选择锤子是足够兴奋的幅度和频率范围内的试样。 </li><li>选择一个尼龙提示。一定要选择一个锤子提示，充分激发的幅度和频率范围内的试样。 </li><li>有限公司nnect锤子数据采集系统用一根BNC电缆。 </li></ol></li><li>确定传感器的位置和附加传感器（ 图4）。 <ol><li>选择在点米的位置和n的损伤位置的任一侧。 </li><li>在安装位置为k的第三加速。来自此传感器的数据将被用于验证嵌入式灵敏度函数分析的结果。 </li><li>附加使用超级胶水加速度计。让超级胶水进行冲击试验之前完全设置。 </li></ol></li><li>选择测试参数在数据采集GUI。 <ol><li>启用双点击检测。 </li><li>采样频率设置为25,600赫兹。的可用频率范围，因此，12800赫兹。 </li><li>设置采样时间为1秒。 </li><li>选择锤子通道作为触发通道。设置触发电平为10欧。 </li><li>预触发长度设置为总采样时间的5％。预-T起重工数据是数据采集开始前收集的数据已被存储在缓冲器中。它来检索并从而使整个冲击事件被捕获的保存这些数据是很重要的。 </li><li>选择H1 FRF估计。此估算假设有在响应通道噪音及力道无噪音。 注:采集过程中不要窗口数据。窗口可以在后处理，如果需要的话被应用。 </li><li>输入加速度计和锤子信息，包括校准系数和识别笔记。 </li><li>除记录保存以及在未来的测试使用的设置。 </li></ol></li></ol> 2.冲击试验的健康之刃<ol><li>影响1点用锤子。当冲击力的幅值超过所选触发电平，该数据采集系统将被触发和数据，包括预触发数据的选定量，将开始记录。 <ol><li>在数据习得N，监督渠道通过观察数据采集软件显示的时间历程，以避免通道限幅和双重影响。 </li><li>在数据采集期间，监视每个加速度计信道的相干通过观察在数据采集软件的相干积来评估所获取的数据的质量。 </li></ol></li><li>重复步骤点1 2.1四次。 <ol><li>使用一致的影响幅度为所有的影响。 </li></ol></li><li>重复步骤所有点2.1和2.2。 </li></ol> 3.冲击试验的损伤叶片<ol><li>为了对损伤叶片，重复第2收集数据用于验证嵌入式灵敏度函数的结果。除了在试验片的变化，所有的测试参数保持相同。 </li></ol>

<ol>
	<li>Singh, N., Joshi, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optimization+of+location+and+number+of+sensors+for+structural+health+monitoring+using+genetic+algorithm.">Optimization of location and number of sensors for structural health monitoring using genetic algorithm.</a> Mater Forum. 33, 359-367 (2009).</li><li>Gao, H., Rose, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ultrasonic+sensor+placement+optimization+in+structural+health+monitoring+using+evolutionary+strategy.">Ultrasonic sensor placement optimization in structural health monitoring using evolutionary strategy.</a> Review Of Qnde. 25, 1687-1693 (2006).</li><li>Raich, A. M., Liszkai, T. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Multi-objective+optimization+of+sensor+and+excitation+layouts+for+frequency+response+function-based+structural+damage+identification.">Multi-objective optimization of sensor and excitation layouts for frequency response function-based structural damage identification.</a> Comput-Aided Civinfrastructure Eng. 27 (2), 95-117 (2012).</li><li>Worden, K., Burrows, A. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optimal+sensor+placement+for+fault+detection.">Optimal sensor placement for fault detection.</a> Eng Struct. 23 (8), 885-901 (2001).</li><li>Flynn, E. B., Todd, M. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+Bayesian+approach+to+optimal+sensor+placement+for+structural+health+monitoring+with+application+to+active+sensing.">A Bayesian approach to optimal sensor placement for structural health monitoring with application to active sensing.</a> Mech Syst Signal Pr. 24 (4), 891-903 (2010).</li><li>Markmiller, J., Chang, F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Sensor+network+optimization+for+a+passive+sensing+impact+detection+technique.">Sensor network optimization for a passive sensing impact detection technique.</a> Struct Health Monit. 9 (1), 25-39 (2010).</li><li>Yang, C., Adams, D., Yoo, S., Kim, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+embedded+sensitivity+approach+for+diagnosing+system-level+noise+and+vibration+problems.">An embedded sensitivity approach for diagnosing system-level noise and vibration problems.</a> J. Sound Vibration. 269 (3), 1063-1081 (2004).</li><li>Yang, C., Adams, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Predicting+changes+in+vibration+behavior+using+first-+and+second-order+iterative+embedded+sensitivity+functions.">Predicting changes in vibration behavior using first- and second-order iterative embedded sensitivity functions.</a> J. Sound Vibration. 323 (1), 173-193 (2009).</li><li>Yang, C., Adams, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+Damage+Identification+Technique+based+on+Embedded+Sensitivity+Analysis+and+Optimization+Processes.">A Damage Identification Technique based on Embedded Sensitivity Analysis and Optimization Processes.</a> J. Sound Vibration. 333 (14), 3109-3119 (2013).</li><li>Rocklin, G. T., Crowley, J., Vold, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+comparison+of+the+H1,+H2,+and+Hv+frequency+response+functions.">A comparison of the H1, H2, and Hv frequency response functions.</a> Proc. Of IMAC III. 1, 272-278 (1985).</li><li>Meyer, J., Adams, D., Silvers, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Embedded+Sensitivity+Functions+for+improving+the+effectiveness+of+vibro-acoustic+modulation+and+damage+detection+on+wind+turbine+blades.">Embedded Sensitivity Functions for improving the effectiveness of vibro-acoustic modulation and damage detection on wind turbine blades.</a> , (2014).</li><li>Guratzsch, R., Mahadevan, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Structural+health+monitoring+sensor+placement+optimization+under+uncertainty.">Structural health monitoring sensor placement optimization under uncertainty.</a> AIAA J. 48 (7), 1281-1289 (2010).</li></ol>

作者什么都没有透露。

测试夹具的设计应复制现实边界条件，使得结果将操作条件下适用。的用于测试撞击点的数量的选择是具有足够的空间分辨率和测试时间之间的权衡。选择基于测试样品的大小和所关注的频率范围内的锤。在一般情况下，锤越小，更宽的频率范围内激发。然而，小锤子通常产生较低幅度的力量。冲击锤被监测与测力计来测量的影响时程。类型锤尖的也影响激发的频率范围。较硬的尖端，更广泛的?...

许多结构健康监测技术依赖于测量的频率响应函数（频响函数）的变化来检测结构中的损坏。然而，很少有这些方法解决如何确定传感器的展示位置和/或输入力的位置，这将最大限度地方法的有效性，检测损坏。嵌入式灵敏度函数（ESFS）可以被用来确定一个FRF的敏感性在一个结构的材料特性的局部变化。因此，由于损伤通常导致在刚度，阻尼或该结构的质量的局部变化，ESFS提供了确定基于FRF的健康监测技术最好传感器和力的位置的方法。 该视频和手稿的目的是为了详细数据采集过程和用于确定结构ESFS最佳做法。该方法包括从模态冲击试验，它是由激发structu进行确定各个的FRF采用模态冲击锤重并测量其与加速度计的响应。在这项工作中，被测试的结构是1.2 m的小区规模的风力涡轮机叶片。测试和分析的目的是确定哪些是向叶片损坏最敏感的传感器位置。这些传感器位置然后可以在一个结构健康状态监测方案来用于监测损伤刀片。 除了使用ESFS来确定最有效的传感器位置的结构健康状态监测方案使用，几个传感器优化布设也可以在文献中证实找到。在[克莱默]，克莱默迭代地计算一组传感器中的观察系统的模式的能力。最近，遗传算法1-3和神经网络4已经开发了确定最佳传感器位置。在图5中 ，贝叶斯方法使用，考虑到不同类型的错误的风险和损坏率的分布。在图6中 ，有限元模型杠杆，以确定最可能检测到损坏的传感器位置。在大多数的文献中提出的传感器的配置的算法，从受损的结构数据，无论是模拟的或测量的，是必需的。嵌入式灵敏度方法的一个优点是，传感器位置可以从健康结构来确定。 ESFS的另一个优点是，材料性质不必明确地已知的。相反，材料性质在为系统的的FRF的表达"嵌入"。因此，所有这一切都需要计算ESFS是一组在特定的输入/输出位置测量的FRF的。具体地，FRF（H JK）为响应所计算的灵敏度在点j测量在点k的输入，以便在刚度点m和n之间的变化（K MN）是<img alt="公式1" src="/files/ftp_upload/53690/53690equation1.jpg" />哪里<img alt="方程2" src="/files/ftp_upload/53690/53690equation2.jpg" />是ESF作为频率的函数，ω7-9。用于测量以计算等式（1）的右手侧所需的FRF的程序是在下一节详细和在视频演示。

<table border="0" cellpadding="0" cellspacing="0" width="573">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Accelerometer</td>
			<td style="width:71px;">PCB</td>
			<td style="width:119px;">356B11</td>
			<td style="width:167px;">three used in testing</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Impact hammer</td>
			<td style="width:71px;">PCB</td>
			<td style="width:119px;">086C01</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Data acquisition card</td>
			<td style="width:71px;">NI</td>
			<td align="right" style="width:119px;">9234</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">DAQ chasis&#160;</td>
			<td style="width:71px;">NI</td>
			<td style="width:119px;">cDAQ-9171</td>
			<td>or similar</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Software</td>
			<td style="width:71px;">MATLAB</td>
			<td style="width:119px;"></td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Super glue</td>
			<td style="width:71px;">Loctite</td>
			<td align="right" style="width:119px;">454</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Handheld Shaker</td>
			<td style="width:71px;">PCB</td>
			<td style="width:119px;">394C06</td>
			<td>for calibration&#160;</td>
		</tr>
	</tbody>
</table>

data acquisition protocol for determining embedded sensitivity functions

许多结构健康监测技术的有效性取决于传感器的位置和输入力的位置。确定最佳的传感器，并迫使地点通常算法需要的数据，无论是模拟或测量，从损坏的结构。嵌入式灵敏度函数提供了确定最好的传感器位置检测与健康的结构唯一的数据损坏的方法。在此视频和手稿，数据采集过程和用于确定结构的内嵌灵敏度函数的最佳实践呈现。在嵌入式灵敏度函数的计算中使用的频率响应函数是通过模态冲击试验获得的。数据获取和有代表性的结果示于住宅​​规模的风力涡轮机叶片。被采集，用于评估的数据的质量策略数据采集过程的示范过程中提供的。 </p&gt;

图1显示了一个典型的嵌入式灵敏度函数。到一个FRF类似，英基具有接近该结构的固有频率峰值。在ESF的值越高，越敏感的位置是一个点m和n之间的损坏。每个风力涡轮机叶片所测试的30磅的具有独特的ESF。这些ESFS可以比较，以确定哪些传感器位置将损坏最敏感。例如， 图2示出了近142赫兹的ESFS的振幅。从该图，很明显，对应于在第?...

Watch this Scientific Journal Video about Data Acquisition Protocol for Determining Embedded Sensitivity Functions at JoVE.com

Data Acquisition Protocol for Determining Embedded Sensitivity Functions

The data acquisition procedure for determining embedded sensitivity functions is described. Data is acquired and representative results are shown for a residential scale wind turbine blade.

数据采集​​协议确定嵌入式灵敏度功能

The effectiveness of many structural health monitoring techniques depends on the placement of sensors and the location of input forces. Algorithms for ...

data-acquisition-protocol-for-determining-embedded-sensitivity

Universidad de Cartagena UDEC

Research

JoVE Journal

Engineering

6.1K 次观看.  Vanderbilt University. The data acquisition procedure for determining embedded sensitivity functions is described. Data is acquired and representative results are shown for a residential scale wind turbine blade.

视频: Data Acquisition Protocol for Determining Embedded Sensitivity Functions

Determining 3D Flow Fields via Multi-camera Light Field Imaging

In the field of fluid mechanics, the resolution of computational schemes has outpaced experimental methods and widened the gap between predicted and observed phenomena in fluid flows. Thus, a need exists for an accessible method capable of resolving three-dimensional (3D) data sets for a range of problems. We present a novel technique for performing quantitative 3D imaging of many types of flow fields. The 3D technique enables investigation of complicated velocity fields and bubbly flows. Measurements of these types present a variety of challenges to the instrument. For instance, optically dense bubbly multiphase flows cannot be readily imaged by traditional, non-invasive flow measurement techniques due to the bubbles occluding optical access to the interior regions of the volume of interest. By using Light Field Imaging we are able to reparameterize images captured by an array of cameras to reconstruct a 3D volumetric map for every time instance, despite partial occlusions in the volume. The technique makes use of an algorithm known as synthetic aperture (SA) refocusing, whereby a 3D focal stack is generated by combining images from several cameras post-capture 1. Light Field Imaging allows for the capture of angular as well as spatial information about the light rays, and hence enables 3D scene reconstruction. Quantitative information can then be extracted from the 3D reconstructions using a variety of processing algorithms. In particular, we have developed measurement methods based on Light Field Imaging for performing 3D particle image velocimetry (PIV), extracting bubbles in a 3D field and tracking the boundary of a flickering flame. We present the fundamentals of the Light Field Imaging methodology in the context of our setup for performing 3DPIV of the airflow passing over a set of synthetic vocal folds, and show representative results from application of the technique to a bubble-entraining plunging jet.

A technique for performing quantitative three-dimensional (3D) imaging for a range of fluid flows is presented. Using concepts from the area of Light Field Imaging, we reconstruct 3D volumes from arrays of images. Our 3D results span a broad range including velocity fields and multi-phase bubble size distributions.

通过多摄像头的光场成像的三维流场测定

In the field of fluid mechanics, the resolution of computational schemes has outpaced experimental methods and widened the gap between predicted and ...

科研

工程学

Quasi-light Storage for Optical Data Packets

Today's telecommunication is based on optical packets which transmit the information in optical fiber networks around the world. Currently, the processing of the signals is done in the electrical domain. Direct storage in the optical domain would avoid the transfer of the packets to the electrical and back to the optical domain in every network node and, therefore, increase the speed and possibly reduce the energy consumption of telecommunications. However, light consists of photons which propagate with the speed of light in vacuum. Thus, the storage of light is a big challenge. There exist some methods to slow down the speed of the light, or to store it in excitations of a medium. However, these methods cannot be used for the storage of optical data packets used in telecommunications networks. Here we show how the time-frequency-coherence, which holds for every signal and therefore for optical packets as well, can be exploited to build an optical memory. We will review the background and show in detail and through examples, how a frequency comb can be used for the copying of an optical packet which enters the memory. One of these time domain copies is then extracted from the memory by a time domain switch. We will show this method for intensity as well as for phase modulated signals.

The article describes a procedure to store optical data packets with an arbitrary modulation, wavelength, and data rate. These packets are the basis of modern telecommunications.

准光存储光学数据包

Today's telecommunication is based on optical packets which transmit the information in optical fiber networks around the world. Currently, the processing ...

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

This paper reports an array-designed C84-embedded Si substrate fabricated using a controlled self-assembly method in an ultra-high vacuum chamber. The characteristics of the C84-embedded Si surface, such as atomic resolution topography, local electronic density of states, band gap energy, field emission properties, nanomechanical stiffness, and surface magnetism, were examined using a variety of surface analysis techniques under ultra, high vacuum (UHV) conditions as well as in an atmospheric system. Experimental results demonstrate the high uniformity of the C84-embedded Si surface fabricated using a controlled self-assembly nanotechnology mechanism, represents an important development in the application of field emission display (FED), optoelectronic device fabrication, MEMS cutting tools, and in efforts to find a suitable replacement for carbide semiconductors. Molecular dynamics (MD) method with semi-empirical potential can be used to study the nanoindentation of C84-embedded Si substrate. A detailed description for performing MD simulation is presented here. Details for a comprehensive study on mechanical analysis of MD simulation such as indentation force, Young&#39;s modulus, surface stiffness, atomic stress, and atomic strain are included. The atomic stress and von-Mises strain distributions of the indentation model can be calculated to monitor deformation mechanism with time evaluation in atomistic level.

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

This paper reports the nanomaterial fabrication of a fullerene Si substrate inspected and verified by nanomeasurements and molecular dynamic simulation.

探测ç<sub&gt; 84</sub&gt; - 嵌入式硅衬底利用扫描探针显微镜和分子动力学

This paper reports an array-designed C84-embedded Si substrate fabricated using a controlled self-assembly method in an ultra-high vacuum chamber. The ...

Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh

Here, the authors report the embedded metal-mesh transparent electrode (EMTE), a new transparent electrode (TE) with a metal mesh completely embedded in a polymer film. This paper also presents a low-cost, vacuum-free fabrication method for this novel TE; the approach combines lithography, electroplating, and imprint transfer (LEIT) processing. The embedded nature of the EMTEs offers many advantages, such as high surface smoothness, which is essential for organic electronic device production; superior mechanical stability during bending; favorable resistance to chemicals and moisture; and strong adhesion with plastic film. LEIT fabrication features an electroplating process for vacuum-free metal deposition and is favorable for industrial mass production. Furthermore, LEIT allows for the fabrication of metal mesh with a high aspect ratio (i.e., thickness to linewidth), significantly enhancing its electrical conductance without adversely losing optical transmittance. We demonstrate several prototypes of flexible EMTEs, with sheet resistances lower than 1 &#937;/sq and transmittances greater than 90%, resulting in very high figures of merit (FoM) &#8211; up to 1.5 x 104 &#8211; which are amongst the best values in the published literature.

This protocol describes a solution-based fabrication strategy for high-performance, flexible, transparent electrodes with fully-embedded, thick metal mesh. Flexible transparent electrodes fabricated by this process demonstrate among the highest reported performances, including ultra-low sheet resistance, high optical transmittance, mechanical stability under bending, strong substrate adhesion, surface smoothness, and environmental stability.

具有嵌入式金属网的高性能，灵活，透明电极的可扩展解决方案处理制造策略

Here, the authors report the embedded metal-mesh transparent electrode (EMTE), a new transparent electrode (TE) with a metal mesh completely embedded in a ...

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

A method for producing simple and efficient thermally-activated delayed fluorescence organic light-emitting diodes (OLEDs) based on guest-host or exciplex donor-acceptor emitters is presented. With a step-by-step procedure, readers will be able to repeat and produce OLED devices based on simple organic emitters. A patterning procedure allowing the creation of personalized indium tin oxide (ITO) shape is shown. This is followed by the evaporation of all layers, encapsulation and characterization of each individual device. The end goal is to present a procedure that will give the opportunity to repeat the information presented in cited publication but also using different compounds and structures in order to prepare efficient OLEDs.

A protocol for the production of simple structured organic light-emitting diodes (OLEDs) is presented.

真空沉积有机发光二极管的生产与表征

A method for producing simple and efficient thermally-activated delayed fluorescence organic light-emitting diodes (OLEDs) based on guest-host or exciplex ...

An Efficient Method for Selective Desalination of Radioactive Iodine Anions by Using Gold Nanoparticles-Embedded Membrane Filter

Here, we demonstrate a detail protocol for the preparation of nanomaterials-embedded composite membranes and its application to the efficient and ion-selective removal of radioactive iodines. By using citrate-stabilized gold nanoparticles (mean diameter: 13 nm) and cellulose acetate membranes, gold nanoparticle-embedded cellulose acetate membranes (Au-CAM) have easily been fabricated. The nano-adsorbents on Au-CAM were highly stable in the presence of high concentration of inorganic salts and organic molecules. The iodide ions in aqueous solutions could rapidly be captured by this engineered membrane. Through a filtration process using an Au-CAM containing filter unit, excellent removal efficiency (&gt;99%) as well as ion-selective desalination result was achieved in a short time. Moreover, Au-CAM provided good reusability without significant decrease of its performances. These results suggested that the present technology using the engineered hybrid membrane will be a promising process for the large-scale decontamination of radioactive iodine from liquid wastes.

An efficient method for the rapid and ion-selective desalination of radioactive iodine in several aqueous solutions is described by using gold nanoparticles-immobilized cellulose acetate membrane filters.

用金纳米粒子-嵌入式膜过滤法选择性脱盐放射性碘阴离子的有效方法

Here, we demonstrate a detail protocol for the preparation of nanomaterials-embedded composite membranes and its application to the efficient and ...

Automated Deployment of an Internet Protocol Telephony Service on Unmanned Aerial Vehicles Using Network Functions Virtualization

The Network Function Virtualization (NFV) paradigm is one of the key enabling technologies in the development of the 5th generation of mobile networks. This technology aims to lessen the dependence on hardware in the provision of network functions and services by using virtualization techniques that allow the softwarization of those functionalities over an abstraction layer. In this context, there is increasing interest in exploring the potential of unmanned aerial vehicles (UAVs) to offer a flexible platform capable of enabling cost-effective NFV operations over delimited geographic areas.
To demonstrate the practical feasibility of utilizing NFV technologies in UAV platforms, a protocol is presented to set up a functional NFV environment based on open source technologies, in which a set of small UAVs supply the computational resources that support the deployment of moderately complex network services. Then, the protocol details the different steps needed to support the automated deployment of an internet protocol (IP) telephony service over a network of interconnected UAVs, leveraging the capacities of the configured NFV environment. Experimentation results demonstrate the proper operation of the service after its deployment. Although the protocol focuses on a specific type of network service (i.e., IP telephony), the described steps may serve as a general guide to deploy other type of network services. On the other hand, the protocol description considers concrete equipment and software to set up the NFV environment (e.g., specific single board computers and open source software). The utilization of other hardware and software platforms may be feasible, although the specific configuration aspect of the NFV environment and the service deployment may present variations with respect to those described in the protocol.

The objective of the described protocol is twofold: to configure a network functions virtualization environment using unmanned aerial vehicles as computational entities providing the underlying structure to execute virtualized network functions and to use this environment to support the automated deployment of a functional internet protocol telephony service over the aerial vehicles.

利用网络功能虚拟化在无人机上自动部署互联网协议电话服务

The Network Function Virtualization (NFV) paradigm is one of the key enabling technologies in the development of the 5th generation of mobile networks. ...

Terahertz Imaging and Characterization Protocol for Freshly Excised Breast Cancer Tumors

This manuscript presents a protocol to handle, characterize, and image freshly excised human breast tumors using pulsed terahertz imaging and spectroscopy techniques. The protocol involves terahertz transmission mode at normal incidence and terahertz reflection mode at an oblique angle of 30&#176;. The collected experimental data represent time domain pulses of the electric field. The terahertz electric field signal transmitted through a fixed point on the excised tissue is processed, through an analytical model, to extract the refractive index and absorption coefficient of the tissue. Utilizing a stepper motor scanner, the terahertz emitted pulse is reflected from each pixel on the tumor providing a planar image of different tissue regions. The image can be presented in time or frequency domain. Furthermore, the extracted data of the refractive index and absorption coefficient at each pixel are utilized to provide a tomographic terahertz image of the tumor. The protocol demonstrates clear differentiation between cancerous and healthy tissues. On the other hand, not adhering to the protocol can result in noisy or inaccurate images due to the presence of air bubbles and fluid remains on the tumor surface. The protocol provides a method for surgical margins assessment of breast tumors.

Freshly excised human breast cancer tumors are characterized with terahertz spectroscopy and imaging following fresh tissue handling protocols. Tissue positioning is taken into consideration to enable effective characterization while providing analysis in a timely manner for future intraoperative applications.

新切除乳腺癌肿瘤的Terahertz成像和表征协议

This manuscript presents a protocol to handle, characterize, and image freshly excised human breast tumors using pulsed terahertz imaging and spectroscopy ...

Determining the Mechanical Strength of Ultra-Fine-Grained Metals

The mechanical strengthening of metals is the long-standing challenge and popular topic of materials science in industries and academia. The size dependence of the strength of the nanometals has been attracting a lot of interest. However, characterizing the strength of materials at the lower nanometer scale has been a big challenge because the traditional techniques become no longer effective and reliable, such as nano-indentation, micropillar compression, tensile, etc. The current protocol employs radial diamond-anvil cell (rDAC) X-ray diffraction (XRD) techniques to track differential stress changes and determine the strength of ultrafine metals. It is found that ultrafine nickel particles have more significant yield strength than coarser particles, and the size strengthening of nickel continues down to 3 nm. This vital finding immensely depends on effective and reliable characterizing techniques. The rDAC XRD method is expected to play a significant role in studying and exploring nanomaterial mechanics.

The protocol presented here describes the high-pressure radial diamond-anvil-cell experiments and analyzing the related data, which are essential for obtaining the mechanical strength of the nanomaterials with a significant breakthrough to the traditional approach.

测定超细晶粒金属的机械强度

The mechanical strengthening of metals is the long-standing challenge and popular topic of materials science in industries and academia. The size ...

Data Communication Based on MQTT in a Polymer Extrusion Process

This work aims at building a flexible data communication structure for a polymer processing machine by employing a publisher-subscriber based protocol called Message Queuing Telemetry Transport (MQTT), which is operated over TCP/IP. Even when using conventional equipment, processing data can be measured and recorded by various devices anywhere through an Internet communication. A message-based protocol allows flexible communication that overcomes the shortcomings of the existing server-client protocol. Multiple devices can subscribe to the processing data published by source devices. The proposed method facilitates data communication between multiple publishers and subscribers. This work has implemented a system that publishes data from the equipment and additional sensors to a message broker. The subscribers can monitor and store the process data relayed by the broker. The system has been deployed and run for a film extrusion line to demonstrate the effectiveness.

This work proposes a flexible method for data communication between a film extrusion system and monitoring devices based on a message protocol called Message Queuing Telemetry Transport (MQTT).

基于MQTT的数据通信在聚合物挤出工艺中的应用

This work aims at building a flexible data communication structure for a polymer processing machine by employing a publisher-subscriber based protocol ...

数据采集协议确定嵌入式灵敏度功能

摘要

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此视频中的章节

通过多摄像头的光场成像的三维流场测定

准光存储光学数据包

探测ç

具有嵌入式金属网的高性能，灵活，透明电极的可扩展解决方案处理制造策略

真空沉积有机发光二极管的生产与表征

用金纳米粒子-嵌入式膜过滤法选择性脱盐放射性碘阴离子的有效方法

利用网络功能虚拟化在无人机上自动部署互联网协议电话服务

新切除乳腺癌肿瘤的Terahertz成像和表征协议

测定超细晶粒金属的机械强度

基于MQTT的数据通信在聚合物挤出工艺中的应用

数据采集​​协议确定嵌入式灵敏度功能

摘要

探索更多视频

此视频中的章节

通过多摄像头的光场成像的三维流场测定

准光存储光学数据包

探测ç

具有嵌入式金属网的高性能，灵活，透明电极的可扩展解决方案处理制造策略

真空沉积有机发光二极管的生产与表征

用金纳米粒子-嵌入式膜过滤法选择性脱盐放射性碘阴离子的有效方法

利用网络功能虚拟化在无人机上自动部署互联网协议电话服务

新切除乳腺癌肿瘤的Terahertz成像和表征协议

测定超细晶粒金属的机械强度

基于MQTT的数据通信在聚合物挤出工艺中的应用

数据采集协议确定嵌入式灵敏度功能