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一次行星际磁场南向突变的高纬电离层对流响应特征

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地球物理学报 2007年第6期50卷 1623-1631页

作者：徐良徐继生 A.V.Koustov 武汉大学电子信息学院武汉430079 Institute of Space and Atmospheric Studies Univ.of SaskatchewanSaskatoonS7N 5E2Canada

本文利用北半球的超级双极光雷达网数据，考察了一次行星际磁场南向突变时高纬电离层对流的响应特征，着重分析了响应的时间尺度．对所研究的事件，行星际磁场南北分量在1．5min内从＋7nT突变到-8nT，而在突变前后约40min内都保持相对... 详细信息

本文利用北半球的超级双极光雷达网数据，考察了一次行星际磁场南向突变时高纬电离层对流的响应特征，着重分析了响应的时间尺度．对所研究的事件，行星际磁场南北分量在1．5min内从＋7nT突变到-8nT，而在突变前后约40min内都保持相对稳定．结果表明，电离层对流的初始响应发生在磁正午附近，相对于行星际磁场突变到达磁层顶的时间有大约3min的滞后；响应与磁地方时有明显依赖关系，离磁正午越远，响应的滞后时间越长，晨昏两侧的对流响应比磁正午滞后约6min，磁午夜的对流响应比磁正午滞后约12min；对流重新趋于稳定的时间与磁地方时没有明显的依赖关系，该时间尺度约为10～14min．

关键词：高纬电离层行星际磁场等离子体对流响应时间超级双极光雷达网

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中立型方程正解的存在性

系统科学与数学 1993年第2期13卷 167-170页

作者：张炳根 B.S.Lalli 青岛海洋大学应用数学系 266003 Dept.of Math.univ.of saskatchewan Canada.

一、引言近年来有大量文章研究中立型泛函微分方程的解的振动性质,但对正解的存在性结果相对说是不多的.最近 Jaros 和 Kusano 系统地研究了高阶中立型微分方程的非振动解的存在性.

关键词：微分方程中立型正解存在性

CRISPR-GE： A Convenient Software Toolkit for CRISPR-Based Genome Editing

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Molecular Plant 2017年第9期10卷 1246-1249页

作者： Xie, Xianrong Ma, Xingliang Zhu, Qinlong Zeng, Dongchang Li, Gousi Liu, Yao-Guang State Key Lab Conservat & Utilizat Subtrop Agrobi Guangzhou 510642 Guangdong Peoples R China Guangdong Prov Higher Educ Inst Key Lab Plant Funct Genom & Biotechnol Guangzhou 510642 Guangdong Peoples R China South China Agr univ Coll Life Sci Guangzhou 510642 Guangdong Peoples R China univ saskatchewan Global Inst Food Secur Saskatoon SK S7N 5A2 Canada

Dear Editor Use of the clustered regularly interspaced short palindromic repeat （CRISPR）-associated protein9 （Cas9） and Cpfl systems in plants （Ma et al., 2016; Wang et al., 2017） involves many steps, including the selection of appropriate specific target site（s） that should have no highly homologous sequences as the potential off-target sites in the genome, the design and synthesis of oligonucleotides involving the target sequences,

关键词： CRISPR-GE: A Convenient Software Toolkit CRISPR-Based Genome Editing

单乙醇胺(MEA)捕获二氧化碳过程解吸能耗的模拟

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湖南大学学报（自然科学版） 2009年第11期36卷 57-61页

作者：梁志武那艳清李文生 TONTIWACHWUTHIKUL P T 湖南大学化学化工学院 CO2捕获与封存国际合作中心(iCCS)湖南长沙410082 International Test Center for CO2 Capture(ITC) Univ of ReginaSaskatchewan S4S 0A2Canada

采用ProMax2.0模拟了30%(质量分数)单乙醇胺填料塔吸收-解吸CO2的传统流程,考察了贫吸收液CO2负载(CLL)和溶液循环流速(SCR)对解吸用再沸器热负荷(Qreb)的影响.全系统模拟结果表明,当CO2移除效率为90%时,CLL增加导致Qreb显著下降后再缓... 详细信息

采用ProMax2.0模拟了30%(质量分数)单乙醇胺填料塔吸收-解吸CO2的传统流程,考察了贫吸收液CO2负载(CLL)和溶液循环流速(SCR)对解吸用再沸器热负荷(Qreb)的影响.全系统模拟结果表明,当CO2移除效率为90%时,CLL增加导致Qreb显著下降后再缓慢上升,其最佳值为0.20 mol CO2/mol MEA(MCPM),此时Qreb达最小值3.24 GJ/t CO2.单独的解吸系统模拟结果显示,当CLL和富吸收液CO2负载(CRL)不变时,解吸塔中富胺进料流量的变化不影响热负荷.然而,由于全吸收-解吸系统CLL和CRL的变化则直接导致解吸塔富胺进料流量和热负荷的变化.

关键词：二氧化碳燃烧后捕获吸收解吸热负荷模拟

利用H_2O-Nacl-CaCl_2体系水盐化合物和冰的融化温度计算NaCl/(Nacl+CaCl_2)比值和盐度的方程

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岩石学报 2007年第1期23卷 33-37页

作者： GuoXiang CHI Pei NI Department of Geology University of Regina3737 Wascana ParkwayReginaSaskatchewanCanada S4S 0A2 State Key Laboratory for Mineral Deposit Research Institute of Geo-fluid ResearchDepartment of Earth ScienceNanjing UniversityNanjing 210093China

The composition of fluid inclusions in the H_2O-NaCl-CaCl_2 system has been generally graphically estimated using the melting temperatures of hydrohalite(T_(m-HH))and ice(T_(m-ice)).Here we present two equations that can be used to calculate the relative proportion of NaCl(i.e.,NaCl/[NaCl+CaCl_2],or X_(NaCl))and the total salinity( i.e.,NaC1 + CaC12,wt% )for fluid inclusions with ice as the last melting phase.X_(NaCl)can be calculated from T_(m-HH)using the following equation: y=(a+bx)^(-1/c) where y is X_(NaCl),x is T_(m-HH),a=0.33124402,b=-0.031518028,and c=*** the cases where only T_(m-ice)is measured and T_(m-HH)is not known,T_(m-ice)can be used as the maximum possible *** to calculate the maximum value of X_(NaCl)using the above *** these cases,the following equation can be used to calculate the maximum total salinity: y=(a+bx+cx^2)^(-1) where y is salinity,x is T_(m-HH),a=0.057184817,b=0.00078565757,and c=*** the isothems in the field of ice are sub-parallel to the NaCl-CaCl_2 binary side in the H20-NaC1-CaC12 ternary system,the errors in salinity calculation introduced by the above approximation are small(less than 2 wt% ).A Windows program for calculation of X_(NsCl)and salinity is available at: http://***/~chiguox.

关键词：水盐化合物冰融化温度计算氯化钠氯化钙比值

Engine speed reduction for hydraulic machinery using predictive algorithms

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International Journal of Hydromechatronics 2019年第1期2卷 1-1页

作者： Travis Wiens univ saskatchewan Dept Mech Engn Fluid Power Lab Saskatoon SK Canada

This paper presents an analysis of the potential for engine speed reduction in hydraulic equipment, taking into account not only the minimum engine speed required to meet the current flow demand, but also the minimum speed capable of accelerating the engine to meet increased flow demand in the near future. This is a predictive task, as it requires an estimate of the operator's intention to increase flow demand. We present an analysis of the potential for engine speed reduction using a work cycle from a 40 ton excavator loading a truck, which results in a potential 33% reduction in the mean engine speed with no reduction in useful work rate. We also present two new engine speed control algorithms to perform this predictive task.

关键词： Engine speed hydraulic machinery predictive algorithms

离子交换树脂膜在农业和环境研究中的最新进展

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植物营养与肥料学报 2000年第3期6卷 334-344页

作者：廖超子 univ of saskatchewan 加拿大 S7N 5A8 单位不详俄罗斯

人工合成的离子交换树脂在农业研究中的应用可追溯到 194 2年[1] 和 194 3年[2 ] 。当时 ,离子交换树脂在砂培中用作植物生长的一种吸附离子源。尽管有报道利用离子交换树脂为植物生长介质提供养分离子和作为缓冲养分溶液的手段[3～ 11... 详细信息

人工合成的离子交换树脂在农业研究中的应用可追溯到 194 2年[1] 和 194 3年[2 ] 。当时 ,离子交换树脂在砂培中用作植物生长的一种吸附离子源。尽管有报道利用离子交换树脂为植物生长介质提供养分离子和作为缓冲养分溶液的手段[3～ 11] ,但离子交换树脂的研究主要集中于用作养分离子库 (ｎｕｔｒｉｅｎｔｉｏｎｓｉｎｋ) ,即提供初始反离子以被土壤中其他离子 (如养分离子 )与之进行交换。收稿日期 :1 998 1 0 0 5本文经作者授权译成中文在本刊发表。译文经ＤｒＰＱｉａｎ审校 ,特此致谢。离子交换树脂作为离子库对发展以离子交换树脂为基础的新提取法来研究各种养分的生物有效性是有价值的。最早用离子交换树脂提取的土壤阳离子和阴离子养分是Ｋ[12 ] 和Ｐ[13] 。此后 ,离子交换树脂越来越多地用来测定土壤有效养分离子的浓度及其释放速率[14～ 19] 。由于它模拟植物根系通过交换反应从土壤中累积养分的过程 ,因而离子交换树脂提取法是一种评估土壤养分有效性的理想方法[2 0～ 2 4 ] 。已有30 0多篇论文报道了树脂技术在土壤养分分析中的应用。作为土壤测试中的一种革新方法 ,树脂技术已...

关键词：离子交换树脂农业土壤养分

Global Wheat Head Detection 2021:An Improved Dataset for Benchmarking Wheat Head Detection Methods

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Plant Phenomics 2021年第1期3卷 277-285页

作者： Etienne David Mario Serouart Daniel Smith Simon Madec Kaaviya Velumani Shouyang Liu Xu Wang Francisco Pinto Shahameh Shafiee Izzat SATahir Hisashi Tsujimoto Shuhei Nasuda Bangyou Zheng Norbert Kirchgessner Helge Aasen Andreas Hund Pouria Sadhegi-Tehran Koichi Nagasawa Goro Ishikawa Sébastien Dandrifosse Alexis Carlier Benjamin Dumont Benoit Mercatoris Byron Evers Ken Kuroki Haozhou Wang Masanori Ishii Minhajul ABadhon Curtis Pozniak David Shaner LeBauer Morten Lillemo Jesse Poland Scott Chapman Benoit de Solan Frédéric Baret Ian Stavness Wei Guo Arvalis Institut du Végétal3 Rue Joseph et Marie Hackin75116 ParisFrance UMR1114 EMMAH INRAECentre PACABâtiment ClimatDomaine Saint-Paul228 Route de l’AérodromeCS 4050984914 Avignon CedexFrance School of Food and Agricultural Sciences The University of QueenslandGatton4343 QLDAustralia Hiphen SAS 120 Rue Jean DaussetAgroparcBâtiment Technicité84140 AvignonFrance Plant Phenomics Research Center Nanjing Agricultural UniversityNanjingChina Wheat Genetics Resource Center Dep.of Plant PathologyKansas State Univ.4024 Throckmorton Plant Sciences CenterManhattanKansasUSA Global Wheat Program International Maize and Wheat Improvement Centre(CIMMYT)MexicoD.F.Mexico Faculty of Biosciences Norwegian University of Life SciencesP.O.Box 5003NO-1432ÅsNorway Agricultural Research Corporation Wheat Research ProgramP.O.Box 126Wad MedaniSudan Arid Land Research Center Tottori UniversityTottori 680-0001Japan Laboratories of Plant Genetics and Plant Breeding Graduate School of AgricultureKyoto UniversityJapan CSIRO Agriculture and Food Queensland Biosciences Precinct306 Carmody RoadSt Lucia4067 QLDAustralia Institute of Agricultural Sciences ETH ZurichUniversitätstrasse 28092 ZurichSwitzerland Plant Sciences Department Rothamsted ResearchHarpendenUK Institute of Crop Science National Agriculture and Food Research OrganizationJapan Hokkaido Agricultural Research Center National Agriculture and Food Research OrganizationJapan Biosystems Dynamics and Exchanges TERRA Teaching and Research CenterGembloux Agro-Bio TechUniversity of Liège5030 GemblouxBelgium Plant Sciences TERRA Teaching and Research CenterGembloux Agro-Bio TechUniversity of Liège5030 GemblouxBelgium Graduate School of Agricultural and Life Sciences The University of Tokyo1-1-1 Midori-choNishitokyo CityTokyoJapan Department of Computer Science University of SaskatchewanCanada Department of Plant Sciences University of SaskatchewanCanada College of Agriculture and Life Sciences University of ArizonaTucsonArizona

The Global Wheat Head Detection(GWHD)dataset was created in 2020 and has assembled 193,634 labelled wheat heads from 4700 RGB images acquired from various acquisition platforms and 7 countries/*** an associated competition hosted in Kaggle,GWHD_2020 has successfully attracted attention from both the computer vision and agricultural science *** this first experience,a few avenues for improvements have been identified regarding data size,head diversity,and label *** address these issues,the 2020 dataset has been reexamined,relabeled,and complemented by adding 1722 images from 5 additional countries,allowing for 81,553 additional wheat *** now release in 2021 a new version of the Global Wheat Head Detection dataset,which is bigger,more diverse,and less noisy than the GWHD_2020 version.

关键词： Wheat adding release