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Quantifying relationships between subsidence and longwall face advance using DInsAR

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International Journal of Mining science and Technology 2021年第1期31卷 91-94页

作者： Bailey s.simmons Jessica M.Wempen Department of Mining Engineering University of UtahUT 84112United States

surface subsidence that results from longwall mining can be large magnitude and can affect significant *** methods for subsidence monitoring include leveling,global positioning system(GPs),and photogrammetric *** sensing techniques including,aerial LiDAR,terrestrial laser scanning,and satellite-based Differential Interferometric synthetic Aperture Radar(DInsAR),are also used to measure deformation associated with *** data are different than data from conventional subsidence *** capture data over large areas(hundreds of kilometers),and each pixel(data point)in an image quantifies the average displacement over an area of square *** data can have fairly high time resolution;imaging periods typically range from weeks to *** data can be useful to monitor subsidence sequentially over short *** monitoring subsidence may help define if caving is progressing normally and can establish relationships between surface deformation and longwall face advance,which has potential to help quantify possible risks to mine *** this study,subsidence at a longwall trona mine is monitored over short periods,typically 12 days,as the longwall face is advanced through a panel.C-band interferometric wide swath synthetic aperture radar(sAR)images from the sentinel satellites are used to quantify the *** onset of subsidence occurs close in time to the beginning of the longwall face advance,and overall,the development of subsidence closely follows the longwall face advance.

关键词： DInsAR subsidence Monitoring Longwall Trona

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缝制中缝纫机针温的计算方法

国外纺织技术(针织及纺织制品分册) 1982年第16期 26-30页

作者： s.simmons 陈贤根

本文所述的内容为计算在连续缝制的全部时间内,针杆部温度分布的数值解法。解析或数式化是由两个不同的要素,即针与布每周期一次在针布接点处连结这样一个缝制系统中来寻求的。这个接点还具有其它重要的特征,对于针表面而言,这个接点的... 详细信息

本文所述的内容为计算在连续缝制的全部时间内,针杆部温度分布的数值解法。解析或数式化是由两个不同的要素,即针与布每周期一次在针布接点处连结这样一个缝制系统中来寻求的。这个接点还具有其它重要的特征,对于针表面而言,这个接点的位置是时间的函数。同时,它是摩擦用功而产生的热源。热源通过针表面传入缝针,形成各种状态进行扩散。在确定物理条件的基础上,对于此类问题试用一般方法,求出其温度的数值,也即要考虑到针杆体积小的因

关键词：函数坯布原布针杆等价

High Performance Frequent subgraph Mining on Transaction Datasets: A survey and Performance Comparison

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Big Data Mining and Analytics 2019年第3期2卷 159-180页

作者： Bismita s.Jena cynthia Khan Rajshekhar sunderraman Department of Computer science Georgia State UniversityAtlantaGA 30302USA

Graph data mining has been a crucial as well as inevitable area of *** amounts of graph data are produced in many areas,such as Bioinformatics,Cheminformatics,social Networks,*** graph data mining methods are getting increasingly popular and necessary due to increased graph *** subgraph mining is one such area where the task is to find overly recurring patterns/*** tackle this problem,many main memory-based methods were proposed,which proved to be inefficient as the data size grew exponentially over *** the past few years,several research groups have attempted to handle the Frequent subgraph Mining(FsM)problem in multiple *** authors have tried to achieve better performance using Graphic Processing Units(GPUs)which has multi-fold improvement over in-memory while dealing with large ***,Google’s MapReduce model with the Hadoop framework proved to be a major breakthrough in high performance large batch *** MapReduce came with many benefits,its disk I/O and noniterative style model could not help much for FsM domain since subgraph mining process is an iterative *** recent years,spark has emerged to be the De Facto industry standard with its distributed in-memory computing *** is a right fit solution for iterative style of programming as *** this survey,we cover how high-performance computing has helped in improving the performance tremendously in the transactional directed and undirected aspect of graphs and performance comparisons of various FsM techniques are done based on experimental results.

关键词： frequent subgraphs isomorphism spark

structure and activity of thermophilic methanogenic microbial communities exposed to quaternary ammonium sanitizer

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Journal of Environmental sciences 2017年第6期29卷 164-168页

作者： Jesus D.Fernandez-Bayo Juliano Toniato Blake A.simmons Christopher W.simmons Department of Food science and Technology University of CaliforniaDauisCA 95616USA Department of Biological and Agricultural Engineering Uniuersity of CaliforniaDauisCA 95616USA Joint BioEnergy Institute EmeryvilleCA 94608USA Biological and Engineering sciences Center Sandia National LaboratoriesLiuermoreCA 94551USA Energy Efficiency Center University of CaliforniaDauisCA 95616USA

Food processing facilities often use antimicrobial quaternary ammonium compound （QAC） sanitizers to maintain cleanliness. These QACs can end up in wastewaters used as feedstock for anaerobic digestion. The aim of this study was to measure the effect of QAC contamination on biogas production and structure of microbial communities in thermo- philic digester sludge. Methane production and biogas quality data were analyzed in batch anaerobic digesters containing QAC at 0, 15, 50, 100 and 150 mg/L. Increasing sanitizer concentration in the bioreactors negatively impacted methane production rate and biogas quality. Microbial community composition data was obtained through 16s rRNA gene sequencing from the QAG-contaminated sludges. sequencing data showed no significant restructuring of the bacterial communities. However, significant restructuring was observed within the archaeal communities as QAC concentration increased. Further studies to confirm these effects on a larger scale and with a longer retention time are necessary.

关键词： Anaerobic digestionAntimicrobialsBiofuelsMicrobial ecologyWaste management

Processing Compressed Expanded Natural Graphite for Phase Change Material Composites

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Journal of Thermal science 2023年第3期32卷 1213-1226页

作者： Alexander BULK Adewale ODUKOMAIYA Ethan simmons Jason WOODs National Renewable Energy Laboratory 15013 Denver West ParkwayGoldenCO 80401USA

Phase change materials(PCMs)are used in various thermal energy storage applications but are limited by their low thermal *** method to increase conductivity involves impregnating organic PCMs into highly porous conductive matrix *** these materials,compressed expanded natural graphite(CENG)matrices have received the most *** this attention,the effect that CENG processing has on PCM saturation and overall matrix thermal conductivity has not been fully ***,the effect of the heat treatment process used to expand intercalated graphite flakes is evaluated *** heat treatment temperatures yielded higher saturation rates and overall saturation at similar matrix *** example,increasing temperature from 300℃to 700℃resulted in approximately 60%-70%increase in pore saturation after 100 minutes of *** exposure time to heat treatment had less of an effect on PCM *** exposure time had negligible effect above 30 min and above 500℃heating ***,because the expanded graphite was found to oxidize around 700℃,the use of longer exposure time in manufacturing applications can be beneficial if a shortened impregnation time is *** treatment conditions did not impact thermal *** composite latent heat of fusion was also reduced approximately proportionally to the PCM mass fraction.A local maximum in axial thermal conductivity was observed at around 83%porosity,which is similar to previous *** observed conductivity at this maximum was a factor of 81 times greater than the conductivity of the PCM.

关键词： phase change materials thermal energy storage compressed expanded natural graphite thermal conductivity enhancement porous material sorptivity composite matrix

Bile acids and their effects on diabetes

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Frontiers of Medicine 2018年第6期12卷 608-623页

作者： cynthia Rajani Wei Jia University of Hawaii Cancer Center HonoluluHI 96813USA shanghai Key Laboratory of Diabetes Mellitus and Center for Translational Medicine Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai 200233China

Diabetes is a widespread, rapidly increasing metabolic disease that is driven by hyperglycemia. Early glycemic control is of primary importance to avoid vascular complications including development of retinal disorders leading to blindness, end-stage renal disease, and accelerated atherosclerosis with a higher risk of myocardial infarction, stroke and limb amputations. Even after hyperglycemia has been brought under control, "metabolic memory," a cluster of irreversible metabolic changes that allow diabetes to progress, may persist depending on the duration of hyperglycemia. Manipulation of bile acid (BA) receptors and the BA pool have been shown to be useful in establishing glycemic control in diabetes due to their ability to regulate energy metabolism by binding and activating nuclear transcription factors such as farnesoid X receptor (FXR) in liver and intestine as well as the G-protein coupled receptor, TGR5, in enteroendocrine cells and pancreatic β-cells. The downstream targets of BA activated FXR, FGF15/21, are also important for glucose/insulin homeostasis. In this review we will discuss the effect of BAs on glucose and lipid metabolism and explore recent research on establishing glycemic control in diabetes through the manipulation of BAs and their receptors in the liver, intestine and pancreas, alteration of the enterohepatic circulation, bariatric surgery and alignment of circadian rhythms.

关键词： bariatric surgery bile acids circadian rhythm diabetes metabolic memory

Using RGB displays to portray colorrealistic imagery to animal eyes

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Current Zoology 2017年第1期63卷 27-34页

作者： cynthia TEDORE sonke JOHNsEN Department of Biology Lund University Solvegatan 35 Lund 223 62 Sweden Department of Biology DukeUniversity Durham 125 Science Drive NC 27708 USA

RGB displays effectively simulate millions of colors in the eyes of humans by modulating the rela-tive amount of light emitted by 3 differently colored juxtaposed lights （red, green, and blue）. Therelationship between the ratio of red, green, and blue light and the perceptual experience of thatlight has been well defined by psychophysical experiments in humans, but is unknown in *** perceptual experience of an animal looking at an RGB display of imagery designed for humansis likely to poorly represent an animal＇s experience of the same stimulus in the real world. This isdue, in part, to the fact that many animals have different numbers of photoreceptor classes thanhumans do and that their photoreceptor classes have peak sensitivities centered over differentparts of the ultraviolet and visible spectrum. However, it is sometimes possible to generate videosthat accurately mimic natural stimuli in the eyes of another animal, even if that animal＇s sensitivityextends into the ultraviolet portion of the spectrum. How independently each RGB phosphor stimu-lates each of an animal＇s photoreceptor classes determines the range of colors that can be simu-lated for that animal. What is required to determine optimal color rendering for another animal is adevice capable of measuring absolute or relative quanta of light across the portion of the spectrumvisible to the animal （i.e., a spectrometer）, and data on the spectral sensitivities of the animal＇sphotoreceptor classes. In this article, we outline how to use such equipment and information togenerate video stimuli that mimic, as closely as possible, an animal＇s color perceptual experienceof real-world objects.

关键词： color vision, computer animation, perception, video playback, virtual reality.

Using Domain Ontology in a semantic Blogging system for Construction Professionals

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Tsinghua science and Technology 2008年第S1期13卷 279-285页

作者： cynthia Changxin Wang school of the Built Environment Faculty of Design Architecture and Building University of Technology Sydney

smooth communication is essential for the success of construction projects. As an easy-to-use, context-rich, and high-capacity communication tool, blogging is gaining popularity in construction industry. In this paper, the features of blogging technology and how it could benefit construction organizations are presented. To further improve the effectiveness of blogging technology in information and knowledge sharing, an ontology-based semantic blogging system is proposed. semantic blogging is an extension of conventional blogging and ontology is the key enabling technology for it. Domain-ontology-based semantic blogging site is composed of a network of concepts, which are clearly defined and interlinked according to their context and bound to certain behaviors. This paper reports how the e-Cognos ontology was implemented into a blogging system and how the system functions to process its contents. The paper concludes that using on-tology-based semantic blogging site can greatly enhance information sharing between construction professionals and it is a very promising tool for construction communities to publish and share their experience.

关键词： semantic blogging ontology construction industry information technology

Inundative field releases and evaluation of three predators for Bemisia tabaci （Hemiptera： Aleyrodidae） management in three vegetable crops

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Insect science 2011年第2期18卷 195-202页

作者： Alvin M. simmons shaaban Abd-Rabou UsDA ARS U.S. Vegetable Laboratory Charleston South Carolina ARC PPRI Dokki Giza Egypt

The sweetpotato whitefly, Bemisia tabaci （Gennadius）（Hemiptera： Aleyrodidae）, is a global pest on numerous crops, including vegetables. Weekly inundative releases of a coccinellid predator （Coccinella undecimpunctata L. [Coleoptera： Coccinellidae]）, a common green lacewing predator （Chrysoperla carnea stephen [Neuroptera： Chrysopidae]）, and a mirid predator （Macrolophus caliginosus [Wagner] [Hemiptera： Miridae]） were independently made in three vegetable crops （cabbage [Brassica oleracea var. capitata L.], cucumber [Cucumis sativus L.], and squash [Cucurbita pepo L.]） for the management of the sweetpotato whitefly. Approximately 1 million to 2.5 million larvae or nymphs of each predator were released in the vegetable crops during 20 weeks. Whitefly populations were reduced by ≈ 25%-45% during most of the season in each crop where each predator was released. The effect of each predator was similar on whitefly population reduction. Late in the season （October） when whitefly populations were low, generally no benefit was obtained from releasing the predators. Numbers of predators recovered during sampling in all crops were greatest for C. carnea, but this corresponded with the fact that more individuals of this predator were released than any other predator in the experiment. These results help define the utility of these natural enemies for managing B. tabaci in vegetable crops.

关键词： Bemisia tabaci Chrysoperla carnea Coccinella undecimpunctata Macrolophus caliginosus inundative release sweetpotato whitefly