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Winter wheat yield improvement by genetic gain across different provinces in China

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Journal of Integrative Agriculture 2024年第2期23卷 468-483页

作者： wei Chen jingjuan Zhang Xiping Deng Key Laboratory of Disaster Monitoring and Mechanism Simulating of Shaanxi Province/School of Geography and Environment Baoji University of Arts and SciencesBaoji 721013China Centre for Crop and Food Innovation Murdoch University90 South StreetMurdochWA 6150Australia State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F UniversityYangling 712100China

The replacement of winter wheat varieties has contributed significantly to yield improvement worldwide,with remarkable progress in *** on two sets of data,production yield from the National Bureau of Statistics of China and experimental yield from literature,this study aims to(1)illustrate the increasing patterns of production yield among different provinces from 1978 to 2018 in China,(2)explore the genetic gain in yield and yield relevant traits through the variety replacement based on experimental yield from 1937 to 2016 in China,and(3)compare the yield gap between experimental yield and production *** results show that both the production and experimental yields significantly increased along with the variety *** national annual yield increase ratio for the production yield was 1.67%from 1978 to 2018,varying from 0.96%in Sichuan Province to 2.78%in Hebei Province;such ratio for the experimental yield was 1.13%from 1937 to *** yield gap between experimental and production yields decreased from the 1970s to the *** study reveals significant increases in some yield components consequent to variety replacement,including thousand-grain weight,kernel number per spike,and grain number per square meter;however,no change is shown in spike number per square *** biomass and harvest index consistently and significantly increased,whereas the plant height decreased significantly.

关键词： genetic gain winter wheat yield yield components

A new thinprep cytologic test of cervical cells and its application

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Frontiers of Medicine 2009年第2期3卷 227-229页

作者： Xiaojun ZHAO jingjuan wei Rong WANG Yajun GU Yunde LIU Clinical Laboratory Science Department of Tianjin Medical University Tianjin 300203China

In order to improve the quality of routine cervical smears,we investigated the new Thinprep cytologic test(TCT)for cervical *** this study,100 women who were enrolled were randomly divided into two *** one group,the TCT for cervical cells was applied(TCT group),and in the other group routine cervical smear was *** addition,the cells in the TCT group were screened by double sifters,and centrifuged using a separation medium so as to eliminate mucus,inﬂammatory cells and blood *** to the cell distribution and the thickness of the smear,the results were assigned to three groups,including satisfactory smears,less satisfactory smears and unsatisfactory *** TCT had a higher satisfactory rate(98%)compared to the routine cervical smear(32%)(P<0.01),indicating the TCT was superior to the routine cervical *** is concluded that the TCT is more ***,in comparison to the routine cervical smear,the TCT for cervical cells has 5 advantages which can greatly increase the cytological accuracy.

关键词： thinprep cytologic test cervical cells Papani-colaou smear

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高铁区位对中国异地投资的影响与异质性评价

地理科学 2024年第3期44卷 400-410页

作者：焦敬娟马王钰青王伟北京交通大学经济管理学院北京100044 中国铁路经济规划研究院有限公司经济与管理研究所北京100038 青岛大学旅游与地理科学学院山东青岛266071

作为一种特殊的跨区域重大基础设施,高速铁路(下文简称为“高铁”)开通减少沿线企业面临的要素约束,降低企业间的信息不对称和代理成本,促进沿线地区资本流动,影响城市间的异地投资。依托2008-2017年中国上市公司新建投资决策数据,以高... 详细信息

作为一种特殊的跨区域重大基础设施,高速铁路(下文简称为“高铁”)开通减少沿线企业面临的要素约束,降低企业间的信息不对称和代理成本,促进沿线地区资本流动,影响城市间的异地投资。依托2008-2017年中国上市公司新建投资决策数据,以高铁所引致的连通性和可达性等区位条件变化为切入,分析和评价高铁对异地投资的影响及其空间异质性。研究发现:①东部地区连通性提升更快,西部地区可达性改善更显著;巨特大城市与中小城市的可达性和连通性的绝对差距不断拉大。②异地投资主要流向东部地区和巨特大城市,但地区差异呈缩小态势。③高铁区位对异地投资有显著正向影响,并且可达性的影响程度大于连通性的影响。④高铁区位对不同地区、不同规模城市异地投资的影响呈现差异性,连通性促进资金向东部地区和巨特大城市流动,可达性则能够显著提升西部地区及小城市对异地投资的吸引。

关键词：高铁区位重大基础设施连通性异地投资空间异质性

替加环素与5种抗菌药物对耐左氧氟沙星嗜麦芽窄食单胞菌的体外药敏试验及联合药敏试验

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首都医科大学学报 2021年第4期42卷 623-628页

作者：尉景娟马立艳苏建荣首都医科大学附属北京友谊医院临床检验中心北京100050

目的观察替加环素与左氧氟沙星、复方新诺明、米诺环素、头孢他啶、头孢哌酮-舒巴坦的单药及联合使用对耐左氧氟沙星的嗜麦芽窄食单胞菌(Stenotrophomonas maltophilia,SMA)的体外抗菌作用。方法33株耐左氧氟沙星的嗜麦芽窄食单胞菌分... 详细信息

目的观察替加环素与左氧氟沙星、复方新诺明、米诺环素、头孢他啶、头孢哌酮-舒巴坦的单药及联合使用对耐左氧氟沙星的嗜麦芽窄食单胞菌(Stenotrophomonas maltophilia,SMA)的体外抗菌作用。方法33株耐左氧氟沙星的嗜麦芽窄食单胞菌分离自首都医科大学附属北京友谊医院的患者血液及无菌部位体液标本,根据其耐药程度不同分为3组(耐左氧氟沙星SMA 17株;耐左氧氟沙星及复方新诺明SMA 11株;耐左氧氟沙星、复方新诺明及米诺环素SMA 5株)。采用微量肉汤稀释法分别测定6种抗菌药物对其最低抑菌浓度(minimum inhibitory concentration,MIC)。采用棋盘式微量肉汤稀释法进行替加环素与其他5种抗菌药物的联合药敏试验,计算部分抑菌指数(fractional inhibitory concentration,FIC)以判定其联合效果。结果替加环素对耐左氧氟沙星SMA和耐左氧氟沙星及复方新诺明SMA的敏感率分别为76.4%和54.5%,稍低于米诺环素的敏感率。联合药敏结果显示,替加环素与左氧氟沙星、头孢他啶、头孢哌酮-舒巴坦联合使用对SMA显示出一定的协同作用,替加环素与复方新诺明和米诺环素没有表现出明显的协同作用,均未显示拮抗作用。结论替加环素单独或联合使用可以作为临床治疗SMA感染的备选用药。

关键词：替加环素嗜麦芽窄食单胞菌微量肉汤稀释法棋盘式微量肉汤稀释法

A low-frequency and broadband wave-insulating vibration isolator based on plate-shaped metastructures

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Applied Mathematics and Mechanics(English Edition) 2024年第7期45卷 1171-1188页

作者： wei wei Feng GUAN Xin FANG College of Intelligent Science National University of Defense TechnologyChangsha410073China Naval Research Academy Beijing100161China

A metamaterial vibration isolator,termed as wave-insulating isolator,is proposed,which preserves enough load-bearing capability and offers ultra-low and broad bandgaps for greatly enhanced wave *** consists of plate-shaped metacells,whose symmetric and antisymmetric local resonant modes offer several low and broad mode bandgaps although the complete bandgap remains high and *** bandgap mechanisms,vibration isolation properties,effects of key parameters,and robustness to complex conditions are *** experimentally demonstrated,the wave-insulating isolator can improve the vibration insulation in the ranges of[50 Hz,180 Hz]and[260 Hz,400 Hz]by 15 dB and 25 dB,respectively,in contrast to the conventional isolator with the same first resonant frequency.

关键词： metamaterial and metastructure vibration isolation bandgap wave insulation plate

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污泥焚烧前处理技术的能耗研究

中国资源综合利用 2018年第11期36卷 134-136页

作者：卢宁魏婧娟宁夏公路勘察设计院有限责任公司银川市节水设施推广中心银川750001

污泥焚烧是处置污泥的有效方式,但是污泥含水量过高往往制约其作用的发挥。为了有效处置和综合利用污泥,污水处理厂需对其进行高干脱水处理。在整个污泥焚烧前处理系统中,高干脱水是最重要的技术。本文介绍了新型污泥脱水技术——电渗... 详细信息

污泥焚烧是处置污泥的有效方式,但是污泥含水量过高往往制约其作用的发挥。为了有效处置和综合利用污泥,污水处理厂需对其进行高干脱水处理。在整个污泥焚烧前处理系统中,高干脱水是最重要的技术。本文介绍了新型污泥脱水技术——电渗透脱水技术(EDW)的原理,探究了该技术在国外污泥脱水领域的研究进展,指出了电渗透脱水的优势及存在的问题。同时,对比各国电渗透脱水技术的能耗,并比较了高干脱水技术与热干化技术的能耗。

关键词：污泥电渗透脱水含固率热干化

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污泥脱水的电渗透技术研究

环境与发展 2018年第10期30卷 103-104页

作者：卢宁魏婧娟宁夏公路勘察设计院有限责任公司宁夏银川750001 银川市节水设施推广中心宁夏银川750001

污泥的处置困难,主要是由于含水量过高。为了综合利用和最终处置,需对污泥作脱水处理。所以在整个污泥处理系统中,脱水是最重要的减量化手段。文章介绍了新型污泥脱水技术—电渗透脱水技术(EDW)的原理及该技术在国内外污泥脱水领域的研... 详细信息

污泥的处置困难,主要是由于含水量过高。为了综合利用和最终处置,需对污泥作脱水处理。所以在整个污泥处理系统中,脱水是最重要的减量化手段。文章介绍了新型污泥脱水技术—电渗透脱水技术(EDW)的原理及该技术在国内外污泥脱水领域的研究进展,指出了电渗透脱水的优势及存在的问题,并对其研究发展作了展望。

关键词：污泥电渗透脱水含固率

儿童特应性皮炎患儿血清IP-10和CXCR3水平及临床意义

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国际检验医学杂志 2023年第18期44卷 2254-2257页

作者：许颖尉景娟孙伟首都医科大学附属北京友谊医院临床检验中心北京100050

目的探讨儿童特应性皮炎(AD)患儿血清干扰素-γ诱导蛋白-10(IP-10)和趋化因子受体3(CXCR3)水平及临床意义。方法选取2020年3月至2022年3月在该院诊断为AD的114例患儿作为AD组,根据特应性皮炎评分(SCORAD)分为轻度组(38例)、中度组(42... 详细信息

目的探讨儿童特应性皮炎(AD)患儿血清干扰素-γ诱导蛋白-10(IP-10)和趋化因子受体3(CXCR3)水平及临床意义。方法选取2020年3月至2022年3月在该院诊断为AD的114例患儿作为AD组,根据特应性皮炎评分(SCORAD)分为轻度组(38例)、中度组(42例)、重度组(34例);同期选择在该院体检健康的108例儿童作为对照组。采用酶联免疫吸附试验(ELISA)检测血清IP-10和CXCR3水平,Pearson法分析AD患儿血清IP-10和CXCR3的相关性,绘制受试者工作特征(ROC)曲线分析IP-10、CXCR3对AD的诊断价值。结果与对照组比较,AD组血清IP-10和CXCR3水平均升高(P<0.05);重度组的IP-10、CXCR3水平和SCORAD评分均高于中度组和轻度组(P<0.05),中度组高于轻度组(P<0.05);相关性分析显示,AD组血清IP-10和CXCR3水平呈正相关(P<0.05);ROC曲线分析显示,二者联合诊断AD的曲线下面积大于IP-10和CXCR3单项诊断(P<0.05)。结论 AD患儿血清IP-10和CXCR3水平均升高,二者联合对AD具有一定的诊断价值。

关键词：特应性皮炎干扰素-γ诱导蛋白-10 趋化因子受体3 儿童

Planet wind: Planetary evolution dominated by electromagnetic forces

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Science China Earth Sciences 2024年第10期67卷 3331-3336页

作者： Yong wei Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

1. Introduction Over the five centuries since Copernicus, the focus of planetary science has transitioned from the visible realm to the invisible. In the more than 60 years following the advent of the space age, our a... 详细信息

关键词： evolution dominated planetary