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Application of Bayesian regularized BP neural network model for analysis of aquatic ecological data—A case study of chlorophyll-a prediction in Nanzui water area of Dongting Lake

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Journal of Environmental Sciences 2005年第6期17卷 946-952页

作者： XU Min ZENG Guang-ming XU Xin-yi HUANG Guo-he SUN Wei JIANG Xiao-yun College of Environmental Science and Engineering Hunan University Changsha 410082 China Sino-Canadian Center of Energy and Environment Research University of Regina Regina SK S4S 0A2 Canada

Bayesian regularized BP neural network（BRBPNN） technique was applied in the chlorophyll-α prediction of Nanzui water area in Dongting Lake. Through BP network interpolation method, the input and output samples of the network were obtained. After the selection of input variables using stepwise/multiple linear regression method in SPSS i1.0 software, the BRBPNN model was established between chlorophyll-α and environmental parameters, biological parameters. The achieved optimal network structure was 3-11-1 with the correlation coefficients and the mean square errors for the training set and the test set as 0.999 and 0.000？8426, 0.981 and 0.0216 respectively. The sum of square weights between each input neuron and the hidden layer of optimal BRBPNN models of different structures indicated that the effect of individual input parameter on chlorophyll- α declined in the order of alga amount 〉 secchi disc depth（SD）〉 electrical conductivity （EC）. Additionally, it also demonstrated that the contributions of these three factors were the maximal for the change of chlorophyll-α concentration, total phosphorus（TP） and total nitrogen（TN） were the minimal. All the results showed that BRBPNN model was capable of automated regularization parameter selection and thus it may ensure the excellent generation ability and robustness. Thus, this study laid the foundation for the application of BRBPNN model in the analysis of aquatic ecological data（chlorophyll-α prediction） and the explanation about the effective eutrophication treatment measures for Nanzui water area in Dongting Lake.

关键词： Dongting Lake chlorophyll-a Bayesian regularized BP neural network model sum of square weights

Mass-transfer studies of solid-base catalyst-aided CO_(2) absorption and solid-acid catalyst-aided CO_(2) desorption for CO_(2) capture in a pilot plant using aqueous solutions of MEA and blends of MEA-MDEA and BEA-AMP

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Clean Energy 2019年第4期3卷 263-277页

作者： James Coker Daniel Boafo Afari Jessica Narku-Tetteh Raphael Idem Clean Energy Technologies Research Institute(CETRI) University of Regina3737 Wascana ParkwayReginaSK S4S 0A2Canada

Mass-transfer studies of catalyst-aided CO_(2) absorption and desorption were performed in a full-cycle,bench-scale pilot plant to improve CO_(2) absorption using 5M MEA,5M MEA-2M MDEA and 2M BEA-2M AMP.A solid-base catalyst,K/MgO,and an acid catalyst,HZSM-5,were used to facilitate absorption and desorption,*** and desorption mass-transfer performance was presented in terms of the overall mass-transfer coefficient of the gas side(KGav)and liquid side(K_(L)a_(v)),*** non-catalytic runs,the highest K_(G)a_(V) and K_(L)a_(V) were 0.086 Kmol m^(3).*** and 0.7851 hr for 2M BEA-2M AMP *** results showed 38.7% KGav and 23.6% K_(L)a_(v) increase for 2M BEA-2M AMP with only HZSM-5 catalyst in desorber and a 95% K_(G)a_(V) and 45% K_(L)a_(V) increase for both K/MgO catalyst and HZSM-5 *** was attributed to the role of K/MgO in bonding loosely with CO_(2) and making it available for the amine reaction.

关键词： HZSM-5 K/MgO catalyst CO_(2)removal efficiency CO_(2)capture mass-transfer coefficients of absorber(KGaV)and desorber(K_(L)a_(V))

Pore size determination using normalized J-function for different hydraulic flow units

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Petroleum 2015年第2期1卷 106-111页

作者： Ali Abedini Farshid Torabi Faculty of Engineering and Applied Science University of ReginaReginaSK S4S 0A2Canada

Pore size determination of hydrocarbon reservoirs is one of the main challenging areas in reservoir *** estimation of this parameter leads to enhance the reservoir simulation,process evaluation,and further forecasting of reservoir ***,it is of great importance to estimate the pore size of reservoir rocks with an appropriate *** the present study,a modified J-function was developed and applied to determine the pore radius in one of the hydrocarbon reservoir rocks located in the Middle *** capillary pressure data *** saturation(PceSw)as well as routine reservoir core analysis include porosity(4)and permeability(k)were used to develop the ***,the normalized porosity(4z),the rock quality index(RQI),and the flow zone indicator(FZI)concepts were used to categorize all data into discrete hydraulic flow units(HFU)containing unique pore geometry and bedding ***,the modified J-function was used to normalize all capillary pressure curves corresponding to each of predetermined *** results showed that the reservoir rock was classified into five separate rock types with the definite HFU and reservoir pore ***,the pore radius for each of these HFUs was determined using a developed equation obtained by normalized J-function corresponding to each *** proposed equation is a function of reservoir rock characteristics including 4z,FZI,lithology index(J*),and pore size distribution index(3).This methodology used,the reservoir under study was classified into five discrete HFU with unique equations for permeability,normalized J-function and pore *** proposed technique is able to apply on any reservoir to determine the pore size of the reservoir rock,specially the one with high range of heterogeneity in the reservoir rock properties.

关键词： Pore size Pore geometry Hydraulic flow unit Capillary pressure J-function

2002～2005年期间萨斯喀彻温省儿科三级医疗中心因呼吸道合胞病毒感染住院的儿童病例分析(英文)

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中国当代儿科杂志 2014年第10期16卷 1005-1013页

作者： Ayisha Kurji Ben Tan Jaya Bodani Bonnie Janzen Athena McConnell Rachana Bodani Derek Rajakumar Anil Sharma Koravangattu Sankaran Department of Pediatrics Royal University HospitalUniversity of Saskatchewan SaskatoonSKCanada Department of Pediatrics Regina General Hospital ReginaSKCanada Department of Community Health and Epidemiology Royal University HospitalUniversity of Saskatchewan SaskatoonSKCanada College of Medicine University of Saskatchewan SaskatoonSKCanada

中文概呼吸道合胞病毒（RSV）是2岁以下儿童呼吸道感染最常见的病原体，也是引起婴儿病毒感染所致死亡的主要原因。到目前为止，尚未见加拿大萨斯喀彻温省RSV流行病学的研究报道。本研究的目的是描述2002年7月至2005年6月期间在萨斯喀... 详细信息

中文概呼吸道合胞病毒（RSV）是2岁以下儿童呼吸道感染最常见的病原体，也是引起婴儿病毒感染所致死亡的主要原因。到目前为止，尚未见加拿大萨斯喀彻温省RSV流行病学的研究报道。本研究的目的是描述2002年7月至2005年6月期间在萨斯喀彻温省的两个儿科三级医疗中心，即皇家大学医院（RUH）和萨斯卡通和里贾纳总医院（RGH），因RSV感染住院的儿童的流行病学特点及疾病严重程度，其中部分患儿有帕利珠单抗（palivizumab）预防史。在上述2个医疗中心住院时间≥24h的儿童（年龄：从出生到16岁11个月）经实验室病毒鉴定确诊为RSV感染的儿童纳入本研究。在RUH中心，患儿鼻咽部分泌物经直接荧光抗体（DFA）检测阳性者确诊为RSV感染。如果DFA为阴性，则对该标本进行病毒培养。在RGH中心，所有患儿鼻咽部分泌物标本均进行DFA检测和病毒培养。确诊后对患儿的健康记录进行回顾性分析，内容包括患儿的人口统计信息、转诊模式、帕利珠单抗预防史、感染严重程度及转归。目前尚无统一的感染严重程度的判断标准，本研究根据住院时间、是否需要小儿重症监护及持续时间、是否机械通气等进行评估。在研究期间，萨斯喀彻温省的帕利珠单抗预防的标准与加拿大儿科学会（CPS）的建议一致。 2002年7月至2005年6月3年期间，总共有590名RSV儿童（包括324名男童）住院治疗，共602次住院记录，其中12名儿童住院1次以上。入院时患儿中位实足年龄为5.3个月，平均住院时间为4.0d（范围：〈1d至121.2个月）。82.4％的患儿出生时胎龄≥36周，7.5％为33-35周，9.5％≤32周。RSV感染住院情况呈现季节性模式，其中大部分发生在三月和六月。患儿最常见的临床表现为细支气管炎（70.2％），38.1％表现为肺炎，17.3％为上呼吸道感染，0.5％表现为哮吼（患儿可能同时有1个以上的临床表现）。478例（81.0％）为RSV轻度至中度感染，110例（18.6％）为重度感染。25.1%的患儿有继发性细菌感染。共有39例（6.7％）需要入住儿科重症监护病房（PICU），中位入住时间为5.0d。其中，22例重症患儿（56％）需要机械通气（通气时间中位数6.0d），14例重症患儿（36％）有继发性细菌感染。与入住普通病房的患儿比较，PICU患儿大多有如下情况：入院时年龄较小（P〈0.01），有潜在的肺部疾病（P〈0.01）或先天性心脏疾病（P=0.01），有两个或更多潜在的疾病（P〈0.01），与其他儿童共同居住（P=0.02）。在本研究过程中，2例儿童死亡，但均与RSV感染无关。本研究有22例患儿在入院前接受过帕利珠单抗预防RSV感染，其中18例已完成至少2个月的剂量，17例（77％）有1个或以上的慢性疾病，14例（64%）出生时胎龄不超过32周。入院时中位实足年龄为5.6个月（范围0-27.5个月），中位住院时间为9.5d（范围2-271d）。大多数儿童（17/22）为轻度至中度RSV感染。小结：RSV在萨斯喀彻温省保持较高的发病率，男性、实足年龄小于1岁的足月儿或晚期早产儿发病率较高。细支气管炎是最常见的临床表现。大多数患儿呈轻度至中度感染，但约7％的患儿需要重症监护。较小的实足年龄、潜在的肺部或心脏疾病或多个潜在疾病等因素均有可能导致患儿需要重症监护。此外，与其他孩子同住也有可能是导致患儿需要重症监护的一个因素。需要重症监护的患儿往往胎龄大于35周。虽然部分接受过帕利珠单抗预防的患儿也感染了RSV，但是其大部分患儿的病情为轻度至中度。这些曾接受过帕利珠单抗预防的患儿更可能有潜在疾病，并且出生时胎龄往往小于32周。在本研究中，无一例因RSV感染而引起的死亡病例。本研究尚浅，需要开展更深入的研究，以进一步确定RSV患儿，特别是PICU患儿以及曾接受过帕利珠单抗预防却仍然受到RSV感染的患儿的特征。

关键词：呼吸道合胞病毒帕利珠单抗儿童

Recent progress and new developments of applications of artificial intelligence (AI), knowledge-based systems (KBS), and Machine Learning (ML) in the petroleum industry

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Petroleum 2020年第4期6卷 I0001-I0002页

作者： Paitoon(PT)Tontiwachwuthikul Christine W.Chan Fanhua(Bill)Zeng Zhiwu(Henry)Liang Teerawat Sema Chao Min Canadian Academy of Engineering(FCAE) Clean Energy Technologies Research Institute(CETRi)University of ReginaSKCanada Canadian Academy of Engineering(FCAE) Canada Research Chair Tier I in Energy and Environmental Informatics(2006-2020)Energy Informatics LaboratoryUniversity of ReginaSKCanada Faculty of Graduate Studies and Research University of ReginaSKCanada Joint International Center for CO2 Capture&Storage(iCCS) Hunan UniversityChangshaHunan410082China Sustainable Multiphase ARtificial-intelligence Technology(SMART)Laboratory Department of Chemical TechnologyChulalongkorn UniversityBangkokThailand Institute for Artificial Intelligence Southwest Petroleum UniversityChengduChina

Over the past two decades,broad-based and intense efforts have been devoted to apply concepts and methodologies from information technology(IT)and artificial intelligence(AI)to informatics research related to energy and environmental *** academic research and industrial practices have generated an impressive amount of literature,which spans virtually every aspect of synergistic work among these *** and systems analysis techniques are now being widely used by the practicing engineers and scientists to solve a broad range of problems in the petroleum *** at the World Economic Forum at Davos Switzerland in 2017,Ginni Rometty,IBM′CEO at that time(now Executive Chairperson of IBM),described AI's role in the partnership between humans and machines as“augmented cognition.”In other words,AI not only supports but augments human cognition so that humans can be more efficient and“do a better job”[1,2].This should also be true and very beneficial for the petroleum industry.

关键词： devoted petroleum knowledge

Effects of Transparent Testa8(TT8) gene and Homeobox12(HB12) gene silencing in alfalfa(Medicago sativa L.) on molecular structure spectral profile in relation to energy,degradation,and fermentation characteristics in ruminant systems

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Animal Nutrition 2023年第3期14卷 79-87页

作者： Yaogeng Lei Abdelali Hannoufa Peiqiang Yu Department of Animal and Poultry Science College of Agriculture and BioresourcesUniversity of Saskatchewan51 Campus DriveSaskatoonSK S7N5A8Canada London Research and Development Centre Agriculture and Agri-Food Canada1391 Sandford StreetLondonON N5V 4T3Canada

Alfalfa(Medicago sativa L.) is a legume forage that is widely cultivated owing to its high biomass yield and favorable nutrient values. However, alfalfa contains relatively high lignin, which limits its *** of two transcriptional factors, Transparent Testa8(TT8) and Homeobox12(HB12), has been proposed to reduce lignin content in alfalfa. Therefore, silencing of TT8(TT8i) and HB12(HB12i) in alfalfa was achieved by RNAi technology. The objective of this project was to determine effect of gene modification through silencing of TT8 and HB12 genes in alfalfa plants on lignin and phenolic content,bioenergic value, nutrient supply from rumen degradable and undegradable fractions, and in vitro ammonia production in response to the silencing of TT8 and HB12 genes in alfalfa. All gene silenced alfalfa plants(5 TT8i and 11 HB12i) were grown under greenhouse conditions with wild type as a *** were analyzed for bioactive compounds, degradation fractions, truly digestible nutrients, energetic values and in vitro ammonia productions in ruminant systems. Furthermore, relationships between physiochemical, metabolic and fermentation characteristics and molecular spectral parameters were determined using vibrational molecular spectroscopy. Results showed that the HB12i had higher lignin, while TT8i had higher phenolics. Both silenced genotypes had higher rumen slowly degraded carbohydrate fractions and truly digestible neutral detergent fiber, but lower rumen degradable protein fractions. Moreover, the HB12i had lower truly digestible crude protein, energetic values and ammonia production compared with other silenced genotypes. In addition, in relation to the nutritive values of alfalfa, structural carbohydrate parameters were negatively correlated, whereas alpha/beta ratio in protein structure was positively correlated. Furthermore, good predictions were obtained for degradation of protein and carbohydrate fractions and energy values from molecular

关键词： Gene silencing Homeobox12(HB12)gene Transparent Testa8(TT8)gene Alfalfa(Medicago sativa L.) Ruminant system Fermentation and degradation

Linkage between permafrost distribution and river runoff changes across the Arctic and the Tibetan Plateau

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Science China Earth Sciences 2020年第2期63卷 292-302页

作者： Chunlin SONG Genxu WANG Tianxu MAO Junchen DAI Daqing YANG Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China College of Forestry Guizhou UniversityGuiyang 550025China National Hydrology Research Centre Environment CanadaSaskatoon SK S7N 3H5Canada

River runoff in the Arctic and the Tibetan Plateau(TP) change significantly in recent decades. However, the mechanisms of the physical processes of permafrost river runoff change remain uncertain across large scale. This study investigated the mainstreams and tributaries of main Arctic and TP rivers dominated by permafrost and assessed the linkage between hydrological regime change and permafrost. The results show that the effects of permafrost on river runoff are highly dependent on the permafrost coverage of a watershed. For the past decades, the majority of the Arctic and TP basins showed increased discharge, while all of the studied basins showed increased baseflow, with faster increasing speed than total *** total discharge and baseflow annual change rate(ΔQ and ΔBF) increased with permafrost coverage, indicating the increments of streamflow are enhanced with high permafrost coverage. Meanwhile, the annual change of precipitation showed weak connection with total discharge and baseflow change. The high permafrost coverage basins showed high annual maximum/minimum discharge ratio(Qmax/Qmin), while the Qmax/Qminchanged slightly in low permafrost cover basins. Our results highlight the importance of permafrost coverage on streamflow regime change for permafrost basins across the northern hemisphere. Due to these linkage between permafrost extent and runoff regime change and the increasing changes of permafrost, more attention should be paid to the change of hydrological processes in permafrost-underlain basins.

关键词： Permafrost hydrology Arctic rivers Tibetan Plateau rivers Permafrost degradation Runoff change

A Plant SMALL RNA-BINDING PROTEIN 1 Family Mediates Cell-to-Cell Trafficking of RNAi Signals

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Molecular Plant 2020年第2期13卷 321-335页

作者： Yan Yan Byung-Kook Ham Yee Hang Chong Shyi-Dong Yeh William J.Lucas Department of Plant Biology College of Biological SciencesUniversity of CaliforniaDavisCA 95616USA Department of Plant Pathology National Chung-Hsing UniversityTaichung Present address:Global Institute for Food Security University of SaskatchewanSaskatoonSK S7N 4J8Canada Present address:Department of Biology University of Saskatchewan112 Science PlaceSaskatoonSK S7N 5E2Canada

In plants,RNA interference(RNAi)plays a pivotal role in growth and development,and responses to environmental inputs,including pathogen *** intercellular and systemic trafficking of small interfering RNA(siRNA)/microRNA(miRNA)is a central component in this regulatory ***,little is known with regards to the molecular agents involved in the movement of these si/*** address this situation,we employed a biochemical approach to identify and characterize a conserved SMALL RNA-BINDING PROTEIN 1(SRBP1)family that mediates non-cell-autonomous small RNA(sRNA)*** Arabidopsis,AtSRBP1 is a glycine-rich(GR)RNA-binding protein,also known as AtGRP7,which we show binds single-stranded siRNA.A viral vector,Zucchini yellow mosaic virus(ZYMV),was employed to functionally characterized the AtSRBP1-4(AtGRP7/2/4/8)RNA recognition motif and GR ***-based studies revealed the GR domain as being necessary and sufficient for SRBP1 cell-to-cell *** together,our findings provide a foundation for future research into the mechanism and function of mobile sRNA signaling agents in plants.

关键词： RNAi small RNA-binding protein family small RNA movement non-cell-autonomous protein glycinerich protein

Constitutive basis of root system architecture:uncovering a promising trait for breeding nutrient-and drought-resilient crops

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aBIOTECH 2023年第4期4卷 315-331页

作者： Zhigang Liu Tongfei Qin Michaella Atienza Yang Zhao Hanh Nguyen Huajin Sheng Toluwase Olukayode Hao Song Karim Panjvani Jurandir Magalhaes William J.Lucas Leon V.Kochian Global Institute for Food Security University of SaskatchewanSaskatoonSK S7N 4L8Canada Department of Computer Science University of SaskatchewanSaskatoonSK S7N 5C9Canada Embrapa Maize and Sorghum Brazilian Agricultural Research CorporationSete LagoasMG 35701-970Brazil Department of Plant Biology College of Biological SciencesUniversity of CaliforniaDavisCA 95616USA

Root system architecture(RSA)plays a pivotal role in efficient uptake of essential nutrients,such as phosphorous(P),nitrogen(N),and water In soils with heterogeneous nutrient distribution,root plasticity can optimize acquisition and plant ***,we present evidence that a constitutive RSA can confer benefits for sorghum grown under both sufficient and limiting growth *** studies,using P efficient SC103 and inefficient BTx635 sorghum cultivars,identified significant differences in root traits,with SC103 developing a larger root system with more and longer lateral roots,and enhanced shoot biomass,under both nutrient sufficient and deficient *** addition to this constitutive attribute,under P deficiency,both cultivars exhibited an initial increase in lateral root development;however,SC103 still maintained the larger root *** N deficiency and drought stress inhibited both root and shoot growth,for both sorghum cultivars,SC103 again maintained the better *** findings reveal that SC103,a P efficient sorghum cultivar,also exhibited enhanced growth performance under N deficiency and *** results provide evidence that this constitutive nature of RSA can provide an avenue for breeding nutrient-and drought-resilient crops.

关键词： Constitutive root system architecture Abiotic stress Nutrient efficiency Drought resilience Plant breeding