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magnetic fluid based squeeze film between porous circular disks with sealed boundary

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Science China mathematics 2001年第S1期44卷 64-69页

作者： R.m.PATEL G.m.DEHERI Department of mathematics Nirma Institute of TechnologyAhmedabad-382 421India Department of mathematics Sardar Patel UniversityVallabh VidyanagarIndia

Efforts have been made to study the effect of the magnetic fluid lubricant and the seal-ing of the boundary for the squeeze film between two circular disks when the upper disk having aporous facing with its boundary sealed, approaches the non-porous lower disk normally. The modi-fied Reynolds equations for the fluid region and the governing Laplacian equation for the pressurein porous region are solved with appropriate boundary conditions. Expressions are obtained forpressure, load carrying capacity and the response time. The results are presented graphically. Thecombined effect of the magnetic fluid lubricant and sealing of the boundary increases the load car-rying capacity significantly and hence the performance of the bearing can be enhanced considera-bly by sealing the boundary and taking a magnetic fluid as lubricant.

关键词： magnetic fluid sealed boundary slider bearing load carrying capacity

Identification of recombination hotspots and quantitative trait loci for recombination rate in layer chickens.

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Light treatment for seasonal Winter depression in African-American vs Caucasian outpatients

畜牧与生物技术杂志(英文版) 2019年第2期

作者： Ziqing Weng Anna Wolc Hailin Su rohan L.Fernando Jack C.m.Dekkers Jesus Arango Petek Settar Janet E.Fulton Neil P.O'Sullivan Dorian J.Garrick Department of Animal Science， Iowa State University Hy-Line International，Dallas Center Hy-Line International AL Rae Centre for Genetics and Breeding， massey University

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World Journal of Psychiatry 2015年第1期5卷 138-146页

作者： Hyacinth N Uzoma Gloria m Reeves Patricia Langenberg Baharak Khabazghazvini Theodora G Balis mary A Johnson Aamar Sleemi Debra A Scrandis Sarah A Zimmerman Dipika Vaswani Gagan Virk Nijjar Johanna Cabassa manana Lapidus Kelly J rohan Teodor T Postolache Department of Psychiatry University of Maryland School of MedicineBaltimoreMD 21201-1549United States Psychiatry Residency Training Program St.Elizabeth’s HospitalWashingtonDC 20032United States Department of Epidemiology and Preventive medicine University of Maryland School of MedicineBaltimoreMD 21201-1549United States Department of Ophthalmology and Visual Science University of Maryland School of MedicineBaltimoreMD 21201-1549United States Family and Community Health University of Maryland School of NursingBaltimoreMD 21201-1549United States Department of Psychological Science University of VermontBurlingtonVT 05405-0134United States VISN 5 Capitol Health Care Network mental Illness Research Education and Clinical Center BaltimoreMD 21201United States VISN 19 Rocky mountain mental Illness Research Education and Clinical Center DenverCO 80220United States 不详

AIm: To compare adherence, response, and remission with light treatment in African-American and Caucasian patients with Seasonal Affective ***: Seventy-eight study participants, agerange 18-64(51 African-Americans and 27 Caucasians)recruited from the Greater Baltimore metropolitan area, with diagnoses of recurrent mood disorder with seasonal pattern, and confirmed by a Structured Clinical Interview for the Diagnostic and Statistical manual of mental Disorders-Ⅳ, were enrolled in an open label study of daily bright light treatment. The trial lasted6 wk with flexible dosing of light starting with 10000 lux bright light for 60 min daily in the morning. At the end of six weeks there were 65 completers. Three patients had Bipolar Ⅱ disorder and the remainder had major depressive disorder. Outcome measures were remission(score ≤ 8) and response(50% reduction)in symptoms on the Structured Interview Guide for the Hamilton Rating Scale for Depression(SIGH-SAD)as well as symptomatic improvement on SIGH-SAD and Beck Depression Inventory-Ⅱ. Adherence was measured using participant daily log. Participant groups were compared using t-tests, chi square, linear and logistic regressions. RESULTS: The study did not find any significant group difference between African-Americans and their Caucasian counterparts in adherence with light treatment as well as in symptomatic *** symptomatic improvement and rate of treatment response were not different between the two groups,African-Americans, after adjustment for age, gender and adherence, achieved a significantly lower remission rate(African-Americans 46.3%; Caucasians 75%; P =0.02).CONCLUSION: This is the first study of light treatment in African-Americans, continuing our previous work reporting a similar frequency but a lower awareness of SAD and its treatment in African-Americans. Similar rates of adherence, symptomatic improvement and treatment response suggest that light treatment is a feasible, acceptable,

关键词： Seasonal affective disorder Depression Light treatment African-American Black Remission gap Ethnicity Race

Design and Development of Low-cost Wearable Electroencephalograms (EEG) Headset

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Intelligent Automation & Soft Computing 2023年第3期35卷 2821-2835页

作者： Riaz muhammad Ahmed Ali m.Abid Anwar Toufique Ahmed Soomro Omar AlShorman Adel Alshahrani mahmoud masadeh Ghulam md Ashraf Naif H.Ali muhammad Irfan Athanasios Alexiou Department of Electrical Engineering Sukkur IBA University65200SukkurPakistan Department of Electronic Engineering Quaid-e-Awam University of EngineeringScience and TechnologyLarkana77150Pakistan Faculty of Engineering and AlShrouk Trading Company Najran UniversityNajran61441Saudi Arabia Department of medical Rehabilitation Sciences-Physiotherapy Program College of Applied Medical SciencesNajran UniversityNajran61441Saudi Arabia Computer Engineering Department Yarmouk UniversityIrbid21163Jordan Pre-Clinical Research Unit King Fahd Medical Research CenterKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of medical Laboratory Technology Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Internal medicine Medical CollegeNajran UniversityNajran61441Saudi Arabia Electrical Engineering Department College of EngineeringNajran University Saudi ArabiaNajran61441Saudi Arabia Novel Global Community Educational Foundation HebershamNSW 2770AustraliaAFNP Med AustriaWien2770Austria

Electroencephalogram(EEG)is a method of capturing the electrophy-siological signal of the *** EEG headset is a wearable device that records electrophysiological data from the *** paper presents the design and fab-rication of a customized low-cost Electroencephalogram(EEG)headset based on the open-source OpenBCI Ultracortex mark IV *** electrode placement locations are modiﬁed under a 10–20 standard *** fabricated headset is then compared to commercially available headsets based on the following para-meters:affordability,accessibility,noise,signal quality,and ***,the data is recorded from 20 subjects who used the EEG Headset,and signals were ***,the participants marked the accuracy,set up time,participant comfort,and participant perceived ease of set-up on a scale of 1 to 7(7 being excellent).Thirdly,the self-designed EEG headband is used by 5 participants for slide *** raw EEG signal is decomposed into a series of band sig-nals using discrete wavelet transform(DWT).Lastly,theseﬁndings have been compared to previously reported *** concluded that when used for slide-changing control,our self-designed EEG headband had an accuracy of 82.0 *** also concluded from the results that our headset performed well on the cost-effectiveness scale,had a reduced setup time of 2±0.5 min(the short-est among all being compared),and demonstrated greater ease of use.

关键词： Brain-computer interface EEG consumer-grade accessibility headset

Optimization of Urban Rail Transportation in Emerging Countries Using Operational Research Techniques

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Applied mathematics 2016年第10期7卷 1116-1123页

作者： m. C. Agarana T. A. Anake H. I. Okagbue Department of mathematics College of Science and Technology Covenant University Ota Nigeria

Rail systems are gradually becoming the most desirable form of transit infrastructure around the world, partly because they are becoming more environmentally friendly compared with airplanes and automobiles. This paper examines the place of emerging countries in this move of implementing modern rail system that will eventually enhance the realization of a low-carbon society. Network model, transportation model and linear programming algorithms are used to model the present urban rail transport system in Nigeria, as an emerging country, in order to optimize it. Operational research methods, including simplex method and modi, with the aids of computer software (excel solver and LIP solver) were adopted to solve the resulting models. The results showed that optimization of rail transport system will not only reduce carbon emission but also bring about economic development which is required for the eradication of prevalent poverty in these emerging countries.

关键词： Rail System Emerging Countries Operational Research Network model Transportation model Linear Programming Algorithm

Effects of Topographic Slopes on Hydrological Proecsses and Climate

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Advances in Atmospheric Sciences 2001年第5期18卷 733-741页

作者： Jinliang Liu Climate Processes and Earth Observation Division, meteorological Service of Canada, 4905 Dufferin Street, Downsview, Ontario m3H 5T4, Canada Han-Ru Cho Department of Atmospheric Science, National Central University, Chungli 320, Taiwan meteorological Service of Canada Department of Atmospheric Science National Central University

Based on previous research results on river re-distribution models, a modification on the effects of topographic slopes for a runoff parameterization was proposed and implemented to the NCAR's land sur- face model (LSm). This modification has two aspects firstly, the topographic slopes cause outflows from higher topography and inflows into the lower topography points; secondly, topographic slopes also cause decrease of infiltration at higher topography and increases of infiltration at lower topography. Then changes in infiltration result in changes in soil molsture, surface fluxes and then in surface temperature, and eventual- ly in the upper atmosphere and the climate. This mechanism is very clearly demonstrated in the point bud- gets analysis at the Andes mountains vicinities. Analysis from a regional scale perspective in the mackenzie GEWEX Study (mAGS) area, the focus of the ongoing Canadian GEWEX program, shows that the modi- fied runoff parameterization does bring significant changes in the regional surface climate more important- ly, detailed analysis from a global perspective shows many encouraging improvements introduced by the modified LSm over the original model in simulating basic atmospheric climate properties such as thermodynamic features (temperature and humidity). All of these improvements in the atmospheric climate simulation illustrate that the inclusion of topographic effects in the LSm can force the AGCm to produce a more realistic model climate.

关键词： Hydrological processes Runoff,Parameterization Topographic slope Climate model Land surface model

Geophysical transect across the North China Craton: A perspective on the interaction between Tibetan eastward escape and Paci fic westward flow

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Geophysical transect across the North China Craton: A perspe...

Evolving technologies for growing,imaging and analyzing 3D root system architecture of crop plants

中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Zhongjie Zhang Guowei Zhang Yangfan Deng m.Santosh Jiwen Teng State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences Department of Geology Northwest University Guangzhou Institute of Geochemistry Chinese Academy of Sciences School of Earth Sciences and Resources China University of Geosciences

The North China Craton(NCC) is composed of the Eastern and Western Blocks amalgamated along the Central Orogenic Belt(Trans-North China Orogen, TNCO). Geological, geochemical, geochronological and geophysical studies have con firmed that the lithosphere beneath the Eastern Block has undergone signi ficant destruction and modi fication during the mesozoic, whereas the Western Block preserves the Archean lithosphere. The mechanisms and crustal response to the lithospheric disruption remain unclear. Here we construct a lithosphere-scale transect across the Western and Eastern Blocks and the intervening TNCO at the southern margin of the NCC. We interpret the lithosphere thickness, crustal P-wave velocity, density and thermal structure, and also seismic activity. Our results show that:(1) crustal thinning is consistent with lithospheric thinning from west to east of this transect;(2) the seismogenic structure is distinctly different among the Western Block, the TNCO and the Eastern Block;(3) a marked increase in crustal density and average P-wave velocity exists at the contacts between the Western Block and TNCO, and the TNCO and Eastern Block, as well as beneath the Tanlu fault at the eastern margin of the Eastern Block;and(4) a positive correlation is displayed between increasing P-wave velocity(density, temperature) and the occurrence of mesozoic basalts and high-mg andesites. Under the tectonic background of the amalgamation pattern between the Eastern and Western Blocks within the NCC, we attribute the lateral variation of crustal geophysical features to the lateral variation of crustal composition or the interaction of mantle flow from the eastward escape from Tibetan collision, and the westward mantle flow beneath the eastern NCC, without excluding the west–east variation of crustal response to lithospheric disruption.

关键词： North China Craton Lithospheric disruption Geophysical transect Tectonics mantle flow

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Journal of Integrative Plant Biology 2016年第3期58卷 230-241页

作者： miguel A.Pieros Brandon G.Larson Jon E.Shaff David J.Schneider Alexandre Xavier Falcao Lixing Yuan Randy T.Clark Eric J.Craft Tyler W.Davis Pierre-Luc Pradier Nathanael m.Shaw Ithipong Assaranurak Susan R.mc Couch Craig Sturrock malcolm Bennett Leon V.Kochian USDA-ARS Robert Holley Center for Agriculture and Health538 Tower RoadIthacaNY 14580USA Department of Information Systems Institute of ComputingUniversity of CampinasAv.Albert Einstein1251CEP 13083-852CampinasSPBrazil Department of Plant Nutrition China Agricultural UniversityBeijing 100193China Department of Plant Breeding and Genetics Cornell UniversityIthacaNY 14853USA Centre for Plant Integrative Biology School of BiosciencesUniversity of NottinghamSutton BoningtonLE12 5RDUK College of Science King Saud UniversityRiyadh 11451Kingdom of Saudi Arabia

A plant＇s ability to maintain or improve its yield under limiting conditions,such as nutrient de ficiency or drought,can be strongly in fluenced by root system architecture（RSA）,the three-dimensional distribution of the different root types in the soil. The ability to image,track and quantify these root system attributes in a dynamic fashion is a useful tool in assessing desirable genetic and physiological root traits. Recent advances in imaging technology and phenotyping software have resulted in substantive progress in describing and quantifying RSA. We have designed a hydroponic growth system which retains the three-dimensional RSA of the plant root system,while allowing for aeration,solution replenishment and the imposition of nutrient treatments,as well as high-quality imaging of the root system. The simplicity and flexibility of the system allows for modi fications tailored to the RSA of different crop species and improved throughput. This paper details the recent improvements and innovations in our root growth and imaging system which allows for greater image sensitivity（detection of fine roots and other root details）,higher ef ficiency,and a broad array of growing conditions for plants that more closely mimic those found under field conditions.

关键词： Abiotic stress digital root phenotyping mineral nutrition root system architecture

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斜阶跃信号激励下耦合RLC互连线时延估计

中国工程科学 2008年第11期10卷 59-64页

作者：李鑫 Janet m Wang 唐卫清吴慧中中国航天科技集团公司第五研究院第508研究所北京100076 南京理工大学计算机科学与技术学院南京210094 亚利桑那大学电子工程系美国亚利桑那州AZ8742 中国科学院计算技术研究所北京100080

考虑实际电路中激励信号不理想对耦合互连线时延分析的影响,建立了斜阶跃信号激励下的互连线时延模型,提出了一种基于耦合RLC互连线的时延分析方法。该方法对已有的解耦算法进行了改进,将斜阶跃信号激励下的耦合互连线模型在线元分析阶... 详细信息

考虑实际电路中激励信号不理想对耦合互连线时延分析的影响,建立了斜阶跃信号激励下的互连线时延模型,提出了一种基于耦合RLC互连线的时延分析方法。该方法对已有的解耦算法进行了改进,将斜阶跃信号激励下的耦合互连线模型在线元分析阶段进行解耦,并结合二阶矩模型及改进的一阶模型对互连线的传递函数进行化简,进而给出耦合互连线的时延估计表达式。实验结果表明,互连线时延估计方法可以对耦合RLC互连线模型的时延进行有效评估。

关键词：斜阶跃信号耦合RLC互连线时延估计解耦二阶矩模型改进的一阶模型