A 15-year-Long catalog of seismicity in the Eastern Tennessee Seismic Zone(ETSZ)using matched filter detection

We present a detailed catalog of 13671 earthquakes in the Eastern Tennessee Seismic Zone(ETSZ)that spans January 1,2005 to July 31,2020.We apply a matched filter detection technique on over 15 years of continuous data,resulting in arguably the most complete catalog of seismicity in the ETSZ yet.The magnitudes of newly detected events are determined by computing the amplitude ratio between the detections and templates using a principal component fit.We also compute the b-value for the new catalog and comparatively relocate a subset of newly detected events using XCORLOC and hypoDD,which shows a more defined structure at depth.We find the greatest concentration along and to the east of the New York-Alabama Lineament,as defined by the magnetic anomaly,supporting the argument that this feature likely is related to the generation of seismicity in the ETSZ.We examine seismicity in the vicinity of the Watts Bar Reservoir,which is located about 5 km from the epicenter of the M_(W) 4.4 December 12,2018 Decatur,Tennessee earthquake,and find possible evidence for reservoir modulated seismicity in this region.We also examine seismicity in the entire ETSZ to search for a correlation between shallow earthquakes and seasonal hydrologic changes.Our results show limited evidence for hydrologicallydriven shallow seismicity due to seasonal groundwater levels in the ETSZ,which contradicts previous studies hypothesizing that most intraplate earthquakes are associated with the dynamics of hydrologic cycles.

PLS质量监控及其在Tennessee Eastman过程中的应用

研究质量监测在部分最小二乘(PLS)框架下的可检测性问题,并给出一种新的主成分确定方法.根据故障子空间和变量的显著性测度确定不同故障对质量的影响力,定义最优检测函数,进而建立PLS最优检测模型(ODM),使模型对严重影响产品质量的重要过程故障具有最优检测能力.以TennesseeEastman(TE)过程为案例进行统计质量控制研究,结果表明此方法对重要过程故障的敏感性很高,有助于及时采取补救措施,稳定产品质量.

Tennessee River Resource Stewardship and Protection: The Tennessee River Line Trail Project and Partnerships

The Tennessee River had a long and colorful history of transporting Native Americans, settlers, armies, and cargo of all types in 1700s and 1800s. The headwaters of the Tennessee River, the largest tributary of the Ohio River, originates in the Appalachian Mountains of eastern United States. Created by the confluence of the Holston and French Broad rivers at Knoxville, the Tennessee River flows approximately 1049 km to Paducah, Kentucky where it drains into the Ohio River. This paper highlights how the landscape and geological resources of the Tennessee River and tributaries watershed contributed to the successful economic development of this historical region of North America. The Tennessee River is one of the most biologically diverse freshwater systems in the United States. Environmental challenges included an unsuccessful attempt to keep invasive species, such as the Asian carp, out of the Tennessee River and the Kentucky Lake. The 1049 river kilometer Tennessee River regional trail system with charter River Towns was designed to promote recreational tourism, increase the use of the Tennessee River and to create generations of people who care about the river and are willing to provide environmental stewardship of the watershed resources and protect the river.

Cathodoluminescence Characteristics and Mineral Chemistry of Tennessee Sphalerites (Tn-Usa)

Optical cathodoluminescence microscopy (CLM) can provide very useful information both on mineral zoning formed during crystal growth and on variations in chemical composition of sphalerites which is reflected by their visible colors. Gem quality sphalerite crystals associated with dolomite, calcite and fluorite having 3 different visible colors - green, honey and brown - were studied to compare their mineral chemistry and CL characteristics. Electron microprobe analyses indicated essentially no significant differences in terms of major components. Although the common CL-quencher ferrous iron contents of all three were lower than 0.25 wt %, none of the sphalerites cathodoluminescenced: two (brown and honey) were non-CL, the green sphalerite showed very week CL in faint brown color. Other trace elements that were analyzed include Fe, Cd, Mn, Ag, Hg, In, Bi, Cu, Ge, and Ga. Fe, Cd, Ga and Cu were relatively higher than the others. Most significant differences with respect to the common trace elements include honey colored sphalerites are essentially Fe- and Cd-poor but rich in Ga, green sphalerites are Fe- and Cd- rich but poor in all the others, and brown sphalerites are rich in Cd. No conclusive relation between non-CL behavior of all three sphalerites and their trace element chemistry was established, however; low quantities of common CL activators in sphalerite crystal structures such as Mn, Cu, and In were the main cause of the non-CL behavior.

Vitamin D Deficiency and Insufficiency in Northeast Tennessee

Background: The role of vitamin D in population subgroups throughout the world continues to be a topic of interest among researchers. Current evidence demonstrates that treating vitamin D deficiency plays a significant role in improving mortality in hospitalized patients, reducing hospital length of stay, and boosting innate immune system. Vitamin D levels vary with age, gender, body mass index (BMI) and geographical area. The purpose of this study is to evaluate vitamin D levels in a cohort of patients in Northeast Tennessee. Study: This institutional review board-approved, retrospective study evaluated vitamin D levels of patients obtained from Mcleod Cancer and Blood Center. Vitamin D levels were collected over a 2-year period and classified as deficient (<20 ng/mL), insufficient (20 - 30 ng/mL), or replete (>30 ng/mL). Data were then stratified based on patient characteristics (age, gender, body mass index (BMI), race, seasons, and place of residence) and compounds of vitamin D (D2 and D3). Results: There were 2011 individuals included, with only 44.3% having replete levels and 21.4% with levels less than 20 ng/mL. Females with vitamin D deficiency are more likely to have levels below 20 ng/ml compared to males (18.6% vs. 23%, respectively, p = 0.003). Regarding BMI, the highest levels were reported in normal weight and overweight. With regards to age, advanced age (≥70) was associated with the highest levels and most replete patients. Winter months were associated with the lowest levels of vitamin D. Higher vitamin D levels were found in individuals over 70 years, normal weight and overweight category. Conclusion: Testing vitamin D levels in high-risk groups becomes of utmost importance in areas with longer winter months, obese and underweight patients. Vitamin D levels should be routinely tested and treated in vulnerable populations.

The Effect of Trihalomethanes in Contaminating the Major Watersheds of Middle Tennessee

We have analyzed the contamination of the three major watersheds in Middle Tennessee (Middle Cumberland River Watershed, Stones River Watershed, and Harpeth River Watershed) by trihalomethanes, such as chloroform, bromodichloromethane, dibromochloromethane, and bromoform. These chemicals play an important role in the develop-ment of cancer and adverse reproductive outcomes, and were found to be present above the threshold established by the Environmental Protection Agency. Certain portions of each watershed were found to be contaminated by the trihalomethanes, and deemed un-healthy. The household incomes in the major areas in the three watershed regions were also examined to determine a possible relationship with the level of water contamination. We concluded that income did not necessarily relate to water quality. Specific areas within each watershed that had lower average household incomes were found to have a higher concentration of the trihalomethanes in their drinking water, while other high-income areas were also affected by unhealthy water. However, these effects were random, and the level of contamination remained below the guidelines regulated by the State of Tennessee.

The Awakening Women in Tennessee Williams' s Plays

Tennessee Williams is a great American playwright. The heroines in the three plays experienced the changes of times.There are also some common threads that weave their way through these women's lives. They are different from the passive women characters in Williams' s early plays. The growth of women is an important part in the development of society. Through the research on the three plays, the causes, the procedure and the significance of their final awakening can be found.

On Escapism in Tennessee Williams' s The Glass Menagerie

Wingfiled’s family is trapped in the cage in Tennessee Williams’s The Glass Menagerie.They want to free their bundles and each of them has taken a different way.This paper considers the theme of escapism by analyzing characters’spiritual world and their existential predicaments.The significance of their own way is explored since they add layers of meaning to the central argument:escapism.Tennessee Williams;

英文歌曲欣赏的艺术视角——浅析英文歌曲《Tennessee Waltz》(田纳西华尔兹)

欣赏英文歌曲不但可以陶冶人的性情,提高精神修养,还可以给人带来审美的愉悦和享受,培养人的审美能力,提升英文欣赏艺术的水平。本文以英文歌曲《Tennessee Waltz》(田纳西华尔兹)为代表,从该歌曲的歌词、字词句型、情感、曲风等艺术欣赏角度对这首传世金曲进行赏析。

NASHVILLE'S "MOST F*ED-UP COUNTRY BAND" Have Tennessee's Lambchop Come of Age?

With the nickname'Music City',Nashville has been at the center of American country music for decades.And for three of those,Kurt Wagner has been writing a unique chapter in his hometown's musical history as the front­man of Lambchop,the self-proclaimed"most fucked-up country band"in the city.

基于Radviz及其优化的可视化故障诊断方法

阐述了Radviz(radial visualization)技术,即将高维数据样本非线性的投影到二维目标空间。Vizrank优化能够从数以万计的投影图中评价和确定最好的投影方式;能够快速找到容易被领域专家认可的可视化模型,只需少量输入变量(2~7)就能够做到数据的可视化,并且有很好的分类效果。在TEP仿真系统中的应用,表明了Radviz及其优化的可视化故障诊断方法可以将正常与故障状态有效地分开。该可视化故障诊断方法具有简单而不失精确性、易于利用领域专家知识、诊断结果直观形象并容易理解等显著优点。

ISOMAP-LDA方法用于化工过程故障诊断

针对化工连续生产过程的时序性及非线性等特征,提出一种新的基于数据驱动的化工过程故障诊断方法:ISOMAP-LDA。首先实行流形学习算法ISOMAP,在保持量测数据几何结构特性下完成非线性降维,然后基于提取的嵌入变量张成的低维空间,选用线性判别分析(LDA)构造故障模式类的判别函数,负责各采样个体故障类型的判定。将该方法用于仿真化工Tennessee East man过程的故障诊断,结果表明,ISOMAP-LDA方法不仅拥有较高的故障诊断能力,而且取得采样在低维空间的可视化表示。

复杂过程的可视化故障诊断方法

A visual method of fault diagnosis for a complicated process was developed based on self-organizing map (SOM).Due to the high dimensionality of the complicated process, principal component analysis (PCA) was introduced to reduce the dimension of the process data.Then the self-organizing map was utilized to project the preprocessed data onto a 2D visualization space in which different process conditions were represented by different regions.Online monitoring could be achieved by the dynamic trajectory in the visualization space.The cause of certain fault could be deduced from the U-matrix of the derived SOM network and the loadings vector of the principal components.The application to the Tennessee Eastman process (TEP) demonstrated that fault detection and diagnosis could be carried out in a more intuitional and practical manner by using the proposed method.

系统的控制策略对多变量统计监控性能的影响

为分析系统控制策略对复杂工业过程多变量统计监控的影响,以模拟实际复杂系统特征的标准问题Ten-nessee Eastman(TE)过程为测试对象,在基本控制、分散控制和厂级控制3种典型控制策略下,比较了各种控制策略的异同及其对于故障的抑制能力.采用故障检出率作为监控性能指标,详细分析了不同控制策略对基于主元分析(PCA)和基于数据相异度的两种具有代表性的多变量统计监控方法的影响.对TE过程20种故障的仿真结果表明,控制策略对监控方法性能的影响十分明显,针对控制策略的特点来选择合适的建模变量和模型参数能有效地提高故障检出率.

《欲望号街车》人物的精神生态研究

一根据美国戏剧家田纳西·威廉斯(Tennessee Williams)的同名戏剧改编的电影《欲望号街车》(1951),由伊利亚·卡赞(Elia Kazan)执导,费雯·丽(Vivien Leigh)及马龙·白兰度(Marlon Brando)主演。该影片展示了女主人公布兰奇在追求理想的爱情过程中连续遭到挫折,性格忧郁、软弱但又不肯妥协。

113号、115号、117号和118号元素中文定名之我见

按照国际惯例,超重元素的定名是由国际纯粹与应用化学联合会（IUPAC）和国际纯粹与应用物理联合会（IUPAP）共同组建的联合工作组来审定。一般规定元素发现者拥有优先命名的推荐权,然后由联合工作组讨论,决定元素的定名,最后由IUPAC正式公布。

现代大学的化工实验室

美国对化工实验室发展情况经常作调查研究,他们认为在化工工程师的培养中,实验室总是起着重要的作用。历史上总认为实验室是工程师真正学习工程的课堂。那末在今天,实验室还仅起这样的作用吗?现代实验室建设的目的是什么呢?最新发展趋向又是什么呢?1978年他们调查了在美国和加拿大的化工系实验室。从五十多个大学中汇总了一百多位回答问题者的看法。

PCA-CHMM在化工过程故障诊断中的应用

为了解决主元分析(principal component analysis,PCA)在故障分类方面的不足,提出一种结合PCA和连续隐马尔可夫模型(continuous hidden Markov model,CHMM)的故障诊断方法.PCA对测量数据进行优化降维,用少数几个主元表征过程主要变化信息,实现过程特征提取.但是PCA不能对这些过程变化信息进行有效的分类和识别,运用CHMM成熟的时序模式分类能力能够较好地解决这个问题.通过Tennessee Eastman过程仿真验证了基于PCA和CHMM的故障诊断方法的性能.

Local component based principal component analysis model for multimode process monitoring

For plant-wide processes with multiple operating conditions,the multimode feature imposes some challenges to conventional monitoring techniques.Hence,to solve this problem,this paper provides a novel local component based principal component analysis(LCPCA)approach for monitoring the status of a multimode process.In LCPCA,the process prior knowledge of mode division is not required and it purely based on the process data.Firstly,LCPCA divides the processes data into multiple local components using finite Gaussian mixture model mixture(FGMM).Then,calculating the posterior probability is applied to determine each sample belonging to which local component.After that,the local component information(such as mean and standard deviation)is used to standardize each sample of local component.Finally,the standardized samples of each local component are combined to train PCA monitoring model.Based on the PCA monitoring model,two monitoring statistics T^(2) and SPE are used for monitoring multimode processes.Through a numerical example and the Tennessee Eastman(TE)process,the monitoring result demonstrates that LCPCA outperformed conventional PCA and LNS-PCA in the fault detection rate.

工程师教育模式在双一流人才培养教学体系中的应用研究

在对田纳西-伊斯曼过程(Tennessee Eastman)的故障检测中,使用了基于主元分析(PCA)、核主元分析(KPCA)、独立成分分析(ICA)、规范变量分析(CVA),以及层级组合方法,对该化工生产过程进行了故障诊断。向学生提供了"训练集"、"测试集"数据以及部分相关资料,并引导学生自行搜索更多文献,鼓励学生以小组为单位,分别探索,共同讨论,从不同的角度观察、分析问题,争取以不同的方式解决问题,最终完成MATALB程序。学生们分别对整个生产过程在SIMULINK中建模,并在最后的讨论中以PPT的形式进行展示、讲解。讨论课中,学生各抒己见,积极分享学习成果,加深了对自动控制原理的理解,增进了对控制系统建模和分析的能力。通过这些科学研究的简化内容,让学生们了解到自己所学的知识可以用于解决工业过程中的典型问题,并通过查阅文献,自主学习,对相关领域有了一定的了解,让学生感到学有所成、学有所用,也为学生们日后对相关领域的深入研究奠定了基础。