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云计算中实现最佳电源系统设计

电子产品世界 2022年第5期29卷 10-11页

作者： Julie tyler 安森美半导体移动、计算和云分部

作为一个家喻户晓的术语,云计算在技术市场领域的重要性和吸引力越来越大。简单地说,云是指通过互联网提供的任何服务。云计算背后的概念是创建一个无处不在的基础设施,以实现对数据和信息的快速、可扩展的访问。虽然大多数人把云定义... 详细信息

作为一个家喻户晓的术语,云计算在技术市场领域的重要性和吸引力越来越大。简单地说,云是指通过互联网提供的任何服务。云计算背后的概念是创建一个无处不在的基础设施,以实现对数据和信息的快速、可扩展的访问。虽然大多数人把云定义和解释为一个大型公共网络,但也有以提供有限访问和需授权的安全专用网络的私有云服务。大多数消费者通过前端访问与云进行交互,云的前端包括软件、应用程序、图形用户接口(GUI)和存储。为了支持大量可选的前端用户接口,云需要一个重要的后端基础设施,包括电源、服务器、数据存储和计算机。随着前端云服务需求的不断增加,后端系统也必须是可升级的和可扩展的。

关键词：云计算用户接口应用程序专用网络基础设施数据存储公共网络私有云服务

Reliability Optimization in the Islanded Mode of Microgrid

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Journal of Energy and Power Engineering 2017年第2期11卷 103-114页

作者： Sundari Ramabhotla Stephen B. Bayne tyler J. Flack Michael Giesselmann Department of Electrical & Computer Engineering Texas Tech University Box 43102 Lubbock TX 79409-3102 USA

A microgrid is a combination of distributed energy resources and controllable loads. The main objective of this research is to optimize energy flow within a microgrid with regards to reliability in grid connected mode. A microgrid with combined heat and power, natural gas generator, diesel generator, solar energy, wind energy, and battery energy storage along with a critical load is considered in this research. An event oriented analytical method called FTA （fault trees analysis） is implemented for reliability optimization using PTC Windchill Solutions software in a microgrid. The reliability of each component in each energy source of the microgrid is calculated using FTA. The reliability of the critical load is evaluated. The quantitative and qualitative results of FTA are evaluated in order to interpret the results of fault tree. The sensitivity and uncertainty of the fault tree results for critical load is deduced by calculating the importance measures such as risk achievement worth, risk reduction worth, criticality importance and Fussel-Vesely importance. Finally from the results the components that are sensitive and at high risk are deduced.

关键词： Fault trees analysis microgrid reliability importance measures critical load quantitative and qualitative analysis.

Analyzing Li-Fi Communication Benefits Compared to Wi-Fi

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International Journal of Communications, Network and System Sciences 2022年第6期15卷 67-77页

作者： Phillip Yarbrough tyler Welker Damian Silva Rafia Islam Vishnu Vardhan Patamsetti Olatunde Abiona Department of Computer Information Systems Indiana University Northwest Gary IN USA

Li-Fi, or known as light fidelity, is a new technology that could alleviate some network congestion for the ever-increasing internet of things (IOT). The patent for Li-Fi was created by German physicist Harald Haas in 2011 around visible light communication. The purpose of the following research includes the capabilities of Li-Fi Technologies and how the implementation of a Li-Fi network can improve network infrastructure. A main point is to highlight the advantages that Li-Fi technology brings to the table in comparison to traditional Wi-Fi networks like the increased bandwidth frequency, faster transmission speeds, as well as not being affected by network latency due to high traffic. Benefits that Li-Fi technologies provide to network infrastructure include the use of less energy, the need for fewer components to operate, as well as the simplicity of only needing a light source to provide high-speed internet traffic. Some of our research shows the implementation of these systems and how they can provide different benefits to different types of needs of the consumer. The research gave a complete idea about hybrid indoor systems based on Li-Fi and Wi-Fi that indicates how Li-Fi technology raises the possibilities to fulfill the technological demand in the future. Also, the part explained the security concerns of Li-Fi technology and we can consider this technology secure by updating some system protocols. At present day, Li-Fi lacks the infrastructure that Wi-Fi has, which makes replacement unideal. Rather, Li-Fi can be seen as complementary to Wi-Fi and used to improve current technology.

关键词： Next Generation Data Transmission Light Fidelity IEEE LED Network Con-gestion

Use of Early Goal-Directed Therapy in the Emergency Department before and after the Sepsis Trilogy

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Open Journal of Emergency Medicine 2016年第2期4卷 33-37页

作者： Loren K. Reed Benton R. Hunter tyler M. Stepsis Department of Emergency Medicine Indiana University School of Medicine Indiana University Indianapolis IN USA

The management of sepsis evolved recently with the publication of three large trials (referred to as the sepsis trilogy) investigating the efficacy of early goal-directed therapy (EGDT). Our goal was to determine if the publication of these trials has influenced the use of EGDT when caring for patients with severe sepsis and septic shock in the emergency department (ED). In February 2014, we surveyed a sample of board-certified emergency medicine physicians regarding their use of EGDT in the ED. A follow-up survey was sent after the publication of the sepsis trilogy. Data was analyzed using 95% confidence intervals to determine if there was a change in the use of EGDT following the publication of the above trials. Subgroup analyses were also performed with regard to academic affiliation and emergency department volume. Surveys were sent to 308 and 350 physicians in the pre-and post-publication periods, respectively. Overall, ED use of EGDT did not change with publication of the sepsis trilogy, 48.7% (CI 39.3% - 58.2%) before and 50.5% (CI 40.6% - 60.3%) after. Subgroup analysis revealed that academic-affiliated EDs significantly decreased EGDT use following the sepsis trilogy while nonacademic departments significantly increased EGDT use. Use of EGDT was significantly greater in community departments versus academic departments following the publication of the sepsis trilogy. There was no change overall in the use of EGDT protocols when caring for patients with severe sepsis and septic shock, but subgroup analyses revealed that academic departments decreased their use of EGDT while community departments increased use of EGDT. This may be due to varying rates of uptake of the medical literature between academic and community healthcare systems.

关键词： Sepsis Early Goal-Directed Therapy Septic Shock EGDT

耳鸣对患者日常影响调查及耳鸣活动问卷的信度检验

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中国耳鼻咽喉头颈外科 2011年第12期18卷 667-670页

作者：潘滔 Richard tyler 宋昱王宇柯嘉马芙蓉北京大学第三医院耳鼻咽喉科北京100191 美国爱荷华大学耳鼻咽喉头颈外科爱荷华城依荷华州52242

目的调查耳鸣对患者日常影响,为耳鸣咨询提供参考和依据。检验耳鸣活动问卷(tinnitus activity questionnaire,TAQ)的可信度(reliability),为TAQ的应用提供依据。方法我院2008～2010年门诊耳鸣患者,耳鸣持续时间长于3个月者195例接受TA... 详细信息

目的调查耳鸣对患者日常影响,为耳鸣咨询提供参考和依据。检验耳鸣活动问卷(tinnitus activity questionnaire,TAQ)的可信度(reliability),为TAQ的应用提供依据。方法我院2008～2010年门诊耳鸣患者,耳鸣持续时间长于3个月者195例接受TAQ调查,以了解耳鸣对患者日常生活的影响。对195例耳鸣患者的耳鸣活动问卷进行因子分析(factor analysis)。结果耳鸣对患者的影响包括:TAQ得分:情绪状况47,注意力27,听力28,睡眠32。情绪状态是耳鸣对患者影响的最主要方面。对TAQ问卷因子分析的结果得出4个因子:分别解释的变异百分比为47.2%、11.9%、6.3%、5.2%,累计解释总体变异70.5%。因子分析的结果比较接近问卷设计的注意力、睡眠、听力、情绪4个方面,但是符合性并不完善。结论耳鸣对患者日常影响的注意力、睡眠、听力、情绪4个方面中情绪是主要的影响方面,耳鸣咨询应侧重该方面。TAQ因子分析结果比较接近问卷设计本身,具有较好的可信度。

关键词：耳鸣问卷调查问卷可信度

Numerical Analysis and Design of an EMF Birdcage Wearable Device for the Treatment of Alzheimer’s Disease: A Feasibility Study

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Journal of Biomedical Science and Engineering 2022年第8期15卷 219-227页

作者： Felipe P. Perez David Michael Arvidson tyler Phoenix Taylor Maryam Rahmani Maher Rizkalla Department of Medicine Division of General Internal Medicine and Geriatrics Indiana University School of Medicine Indianapolis USA Department of Electrical and Computer Engineering Indiana University-Purdue University Indianapolis USA

In this study, we performed a numerical analysis of a novel EMF Birdcage wearable device for the treatment of Alzheimer’s disease (AD). We designed the new device to generate and radiate a frequency of 64 MHz and a specific absorption rate (SAR) of 0.6 W/kg to a simulated human brain tissue. We determined these parameters from our experimental studies on primary human brain cultures at the Indiana University School of Medicine (IUSM). We found that this frequency and SAR decreased the toxic Aβ levels in the cell cultures. The frequency of 64 MHZ has good skin depth penetration, which will easily pass through the various head layers, including hair, skin, fat, dura, the cerebrospinal (CSF), and grey matter, and reach deeply into the brain tissues. The SAR of 0.6 W/kg was achieved with lower power input and energy, decreasing the probability of thermal injury. Therefore, these parameters enhance the safety of these potential treatments. This Birdcage device emulates a small-scale MRI machine, producing the same 64 MHz frequency at much lower operating input power. In this work, we utilized a high-frequency simulation system (HFSS/EMPro) software to produce the birdcage structure for the required EMF parameters. The 64 MHz radiating frequency produced the scattering S11 parameter of −15 dbs. We obtained a SAR of 0.6 W/kg when an input power of 100 W was applied. The coil dimensions were found to be near 15 cm in height and 22 cm in diameter, which fits in wearable systems. We found that the distribution of the electric field and SAR radiate homogeneously over the simulated human head with good penetration into the brain, which proves to be an appropriate potential therapeutic strategy for Alzheimer’s disease.

关键词： Alzheimer Disease Birdcage Treatment HFSS EMF Temperature

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智能电池管理加速移动电源的演进

今日电子 2016年第12期 53-54页

作者： Matthew tyler 安森美半导体公司

有许多动态对不断扩大的便携式电子领域产生重大影响。便携式电子设备（如智能手机和平板电脑）正结合越来越广泛的功能，因为制造商希望在竞争极其激励的市场获得超越竞争对手的优势。同时这些产品需要保持紧凑和简化。

关键词：智能电池管理移动电源便携式电子设备演进竞争对手电子领域平板电脑智能手机

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薄膜分离技术

化工文摘 2004年第1期 56-57页

作者： Alan tyler

目前许多行业都开始认识到完全有必要对自己的工业用水处理方式进行再评估,借此可以提高产品质量和工艺效率。利用横流薄膜过滤模式如反渗透、纳滤或者超滤的提纯系统可以很好地取代传统的过滤和化学品处理系统。反渗透横流薄膜过滤系... 详细信息

目前许多行业都开始认识到完全有必要对自己的工业用水处理方式进行再评估,借此可以提高产品质量和工艺效率。利用横流薄膜过滤模式如反渗透、纳滤或者超滤的提纯系统可以很好地取代传统的过滤和化学品处理系统。反渗透横流薄膜过滤系统过滤后的水与软化水、蒸馏水的质量等同。尽管薄膜渗透的基本原理早在上个世纪50年代就已经开发出来,但直到70年代超滤和反渗透横流薄膜过滤技术才被作为一种高效、经济、可靠的分离工艺被大众所接受。反渗透横流薄膜过滤成本低。

关键词：薄膜分离技术水处理反渗透纳滤超滤过滤

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德国公司拓展中国业务

化工文摘 2002年第6期 18-19页

作者： Alan tyler

过去10年里,德国公司积极投资中国化工业,不断拓展其在中国的业务。在中国加入世贸组织之后,各大德国公司更是抓住这一机遇,扩大在中国的投资和发展,并通过与中国企业的合作提升其在中国的发展速度。以下是德固萨、巴斯夫和拜耳等大型... 详细信息

过去10年里,德国公司积极投资中国化工业,不断拓展其在中国的业务。在中国加入世贸组织之后,各大德国公司更是抓住这一机遇,扩大在中国的投资和发展,并通过与中国企业的合作提升其在中国的发展速度。以下是德固萨、巴斯夫和拜耳等大型公司最近在中国的一些投资活动。

关键词：德国化工公司中国业务拓展投资发展生产规模