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广西糯玉米品种种质构成及穗部性状选育探讨

玉米科学 2024年第3期32卷 14-19页

作者：韦林汕侯青光黄柄壬卢亚妮韦贵剑李宏滇韦佳毅蔡理文韦敏超韦成鲜广西壮族自治区河池市农业科学研究所广西河池547000 广西壮族自治区河池市宜州区植保站广西河池547000

对2011-2022年广西审定的173个糯玉米品种进行分析,研究广西糯玉米品种种质来源、构成,探析品种选育路径。结果表明,广西糯玉米主要种质由A(宜山糯)类、B(京科糯2000)类、C(万糯2000)类、D(燕禾金2000)类、E(中糯1号)类、F(中糯2号)类... 详细信息

对2011-2022年广西审定的173个糯玉米品种进行分析,研究广西糯玉米品种种质来源、构成,探析品种选育路径。结果表明,广西糯玉米主要种质由A(宜山糯)类、B(京科糯2000)类、C(万糯2000)类、D(燕禾金2000)类、E(中糯1号)类、F(中糯2号)类、G(衡白522)类、H(华珍)类、I(花甜糯179)类、J(NA群体)类、K(NB群体)类等11类种质构成,A、B类种质是广西糯玉米品种的基础种质。根据亲本主要种质类型,排除年份间的环境变化因素,可将93个品种归入AB等15个群组。各群组穗部性状相关分析表明,穗行数、穗粗与产量及其他穗部性状分别呈显著负效应及无显著效应,群组相关性受到种质组合及组配模式共同影响,通常情况下种质组合的影响力更强,涉及F类种质的群组则相反。因此,穗部性状选育重点要根据亲本主要种质类型确定。

关键词：糯玉米种质构成种质组合组配模式

Pillar uplift of a subway station caused by foundation pit excavation in deep soft soil area

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Yantu Lixue/Rock and Soil Mechanics 2020年 41卷 397-404页

作者： Gao, Yan-Bin Yang, Zheng-Yuan Liu, chao-min Li, Wen-Yong College of Civil Engineering Tongji University Shanghai 200092 China Construction Management Center Shanghai Shentong Metro Group Company Shanghai 200092 China

The steel pillars are usually used as vertical supports to maintain the stability of the internal support in the braced excavation. As a case study, the pillar uplift in a subway station, with the excavation depth of 17.6 m, located in a thick soft layer of paleochannel with a total thickness up to 40 m in Shanghai are studied. When the excavation reaches to the bottom of pit, the monitored uplift δhv in the standard section is in the range of 60-80 mm, causing cracks in some reinforced concrete layer. The uplift process of steel pillars is roughly divided into three stabilization stages: the early low-speed stage (Fssv and the maximum lateral displacement of the diaphragm wall(δhhm). The lateral displacement of the deep soil at the bottom of the diaphragm wall causes a larger δhv/δhhm of the standard section in the late stages of excavation. The uplift amount of the steel pillar for the end well is within 30 mm and much smaller than that of the standard section. There is no obvious lateral displacement in the soil at the bottom of the wall, showing a significant spatial effect. In addition, the uplift amount of the steel pillar decreases along the excavation direction during the stepped excavation mode. It is necessary to pay more attention on the influence of excavation mode and pouring process of slab on the uplift of the pillars. © 2020, Science Press. All right reserved.

关键词： Safety factor

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柱状装药爆破应力分布的研究

振动与冲击 2010年第10期29卷 91-94页

作者：穆朝民齐娟安徽理工大学能源与安全学院安徽淮南232001 煤矿安全高效开采省部共建教育部重点实验室安徽淮南232001 中国科学技术大学近代力学系合肥230026 总参工程兵科研三所河南洛阳471023

根据岩石爆破特征,利用柱状空腔膨胀理论对爆破产生的弹塑性区的应力分布进行了研究,给出了弹塑性区内应力分布的解析表达式。借助于爆炸力学近似计算公式,验证了应力在弹塑性区的分布,理论计算结果表明,理论计算值与近似计算基本一致。

关键词：爆炸力学应力分布柱状装药空腔膨胀

A New Peptide with Membrane-permeable Function Derived from Human Circadian Proteins

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Acta Biochimica et Biophysica Sinica 2004年第9期36卷 629-636页

作者： Tao PENG, Ying-Hui LIU, Chun-Lei YANG, chao-min WAN, Yao-Qi WANG, and Zheng-Rong WANG* Department of Biomedical Engineering, School of Basic Medicine and Forensic, Sichuan University, Chengdu 610041, China Department of Biomedical Engineering School of Basic Medicine and Forensic Sichuan UniversityChengdu 610041 China

Basic peptides such as human immunodeficiency virus type 1 (HIV-1) Tat-(48-60) and Droso- phila Antennapedia-(43-58) have been reported to have a membrane permeability and a carrier function for intracellular protein delivery. Based on the fluorescence microscopic observations of the vascular endothelial cells (ECV-304) and the primary cultured neuroglial cells, we found that human Clock protein DNA-binding peptide [residue 35–47, hClock-(35-47)] had a translocation activity very similar to Tat-(48-60). The cellular uptake of hClock-(35-47) increases with the increase of incubation time and concentration. The internalization effect at 4 °C was same as that at 37 °C. Internalization of hClock-(35-47) was saturable and could be inhibited by the excess of the other MPPs. Moreover, The uptake of these peptides were significantly inhibited in the presence of heparan sulfate. These results strongly suggested that the hClock-(35-47) shared a common or very similar internalization pathway with other MPPs. Furthermore, we injected rat through the common carotid artery with hClock-(35-47)-FITC peptide, and cryostat sections of the brain were prepared and observed using a fluorescence microscope. Result showed that the peptide had the ability to translocate through the blood-brain barrier. It is promising to provide a new safe carrier for the intracellular and encephalic treatment.

关键词： membrane-permeable peptide (MPP) cell membrane hClock DNA-binding peptide blood-brain barrier

基于LDA模型与共享语义空间的新兴技术识别——以自动驾驶汽车为例

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数据分析与知识发现 2022年第2期6卷 55-66页

作者：周云泽闵超南京大学信息管理学院南京210023

【目的】提出一种多源数据下,通过共享语义空间对技术主题进行表征的新兴技术识别方法,并探究方法的有效性。【方法】使用LDA主题模型识别多源数据主题,用Word2Vec模型基于主题代表词汇及其权重,将主题表示为向量,进而进行主题合并。使... 详细信息

【目的】提出一种多源数据下,通过共享语义空间对技术主题进行表征的新兴技术识别方法,并探究方法的有效性。【方法】使用LDA主题模型识别多源数据主题,用Word2Vec模型基于主题代表词汇及其权重,将主题表示为向量,进而进行主题合并。使用主题强度、主题新颖度指标判别新兴主题。【结果】在具体的自动驾驶汽车实证领域,共识别出了驾驶主体切换、行驶轨迹选择与控制、变道安全、运动估计及风险规避、汽车结构设计、感知环境技术、通信技术及通信安全等7个新兴技术。【局限】未来将探讨如何更客观地确定阈值,以及细化主题的粒度。【结论】运用LDA主题模型与共享语义空间,可以在多源数据下识别出新兴技术主题,优化现有的识别方法。

关键词：新兴技术识别 LDA主题模型自动驾驶汽车语义空间 Word2Vec

爆炸荷载作用下煤体裂纹扩展机理模型实验研究

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振动与冲击 2012年第13期31卷 58-61页

作者：穆朝民齐娟安徽理工大学能源与安全学院淮南232001 煤矿安全高效开采省部共建教育部重点实验室淮南232001 总参工程兵科研三所洛阳471023 安徽理工大学现代教育技术中心淮南232001

为研究煤体在柱状装药爆炸荷载作用下裂纹扩展机理,以Froude比例法为指导,建立煤层预裂爆破的模型实验。得到爆炸波在模型介质中传播的压力波形及模型表面加速度、应变、位移波形。描述模型在爆炸荷载作用下的宏观破坏现象。研究结果表... 详细信息

为研究煤体在柱状装药爆炸荷载作用下裂纹扩展机理,以Froude比例法为指导,建立煤层预裂爆破的模型实验。得到爆炸波在模型介质中传播的压力波形及模型表面加速度、应变、位移波形。描述模型在爆炸荷载作用下的宏观破坏现象。研究结果表明:模型实验与现场试验结果基本一致;裂纹主要是由压缩波与卸载波共同作用形成的;裂纹扩展方向与炮孔轴线方向垂直。

关键词：爆炸力学含瓦斯煤柱状装药模型实验

Improving Arctic Sea-Ice Thickness Estimates with the Assimilation of CryoSat-2 Summer Observations

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Ocean-Land-Atmosphere Research 2023年第1期2卷 298-308页

作者： chao min Qinghua Yang Hao Luo Dake Chen Thomas Krumpen Nabir Mamnun Xiaoyu Liu Lars Nerger School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)ZhuhaiChina Alfred Wegener Institute Helmholtz Centre for Polar and Marine ResearchBremerhavenGermany

Rapidly shrinking Arctic sea ice has had substantial impacts on the Earth ***,reliably estimating the Arctic sea-ice thickness(SIT)using a combination of available observations and numerical modeling is urgently ***,for the first time,we assimilate the latest CryoSat-2 summer SIT data into a coupled ice-ocean *** particular,an incremental analysis update scheme is implemented to overcome the discontinuity resulting from the combined assimilation of biweekly SIT and daily sea-ice concentration(SIC)*** with improved estimates of sea-ice volume,our SIT estimates corrected the overestimation of SIT produced by the reanalysis that assimilates only SIC in summer in areas where the sea ice is roughest and experiences strong deformation,e.g.,around the Fram Strait and *** study suggests that the newly developed CryoSat-2 SIT product,when assimilated properly using our approach,has great potential for Arctic sea-ice simulation and prediction.

关键词： prediction Arctic CryoSat

Supporting-electrolyte-free electrochemical[2+2+1]annulation of benzo[d]isothiazole 1,1-dioxides,N-arylglycines and paraformaldehyde

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Chinese Chemical Letters 2024年第6期35卷 327-330页

作者： Hai-Yang Song Jun Jiang Yu-Hang Song min-Hang Zhou chao Wu Xiang Chen Wei-min He School of Chemistry and Chemical Engineering University of South ChinaHengyang 421001China

The H-bond promoted electrochemical[2+2+1]annulation of benzo[d]isothiazole 1,1-dioxides,Narylglycines and paraformaldehyde for the synthesis of various benzo[d]imidazo[1,5-b]isothiazole 5,5-dioxide derivatives under ... 详细信息

关键词： H-bond N-Arylglycines Paraformaldehyde Organic electro-synthesis Electrolyte-free

Association of daily sitting time and leisure-time physical activity with body fat among ***

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Journal of Sport and Health Science 2024年第2期13卷 195-203页

作者： Jingwen Liao min Hu Kellie Imm Clifton J.Holmes Jie Zhu chao Cao Lin Yang Guangdong Provincial Key Laboratory of Physical Activity and Health Promotion Guangzhou Sport UniversityGuangzhou 510500China Scientific Research Center Guangzhou Sport UniversityGuangzhou 510500China Division of Epidemiology&Genetics Department of Population and Public Health SciencesKeck School of Medicine of the University of Southern CaliforniaLos AngelesCA 90033USA Program in Physical Therapy Washington University School of MedicineSt.LouisMO 63110USA Center for Human Nutrition Washington University School of MedicineSt.LouisMO 63110USA Department of Plastic and Reconstructive Surgery Shanghai East HospitalTongji UniversityShanghai 200070China Department of Cancer Epidemiology and Prevention Research Alberta Health ServicesCalgary T2S 3C3Canada Department of Oncology and Community Health Sciences University of CalgaryCalgary T2N 1N4Canada

Background:Prolonged sitting and reduced physical activity lead to low energy ***,little is known about the joint impact of daily sitting time and physical activity on body fat *** investigated the independent and joint associations of daily sitting time and physical activity with body fat among ***:This was a cross-sectional analysis of *** representative data from the National Health and Nutrition Examination Survey2011-2018 among adults aged 20 years or *** sitting time and leisure-time physical activity(LTPA)were self-reported using the Global Physical Activity *** fat(total and trunk fat percentage)was determined via dual X-ray ***:Among 10,808 adults,about 54.6%spent 6 h/day or more sitting;more than one-half reported no LTPA(inactive)or less than 150 min/week LTPA(insufficiently active)with only 43.3%reported 150 min/week or more LTPA(active)in the past *** fully adjusting for sociodemographic data,lifestyle behaviors,and chronic conditions,prolonged sitting time and low levels of LTPA were associated with higher total and trunk fat percentages in both *** stratifying by LTPA,the association between daily sitting time and body fat appeared to be stronger in those who were inactive/insuufficiently *** the joint analyses,inactive/insuufficiently active adults who reported sitting more than 8 h/day had the highest total(female:3.99%(95%confidence interval(95%CI):3.09%-4.88%);male:3.79%(95%CI:2.75%-4.82%))and trunk body fat percentages(female:4.21%(95%CI:3.09%-5.32%);male:4.07%(95%CI:2.95%-5.19%))when compared with those who were active and sitting less than 4 h/***:Prolonged daily sitting time was associated with increased body fat among *** higher body fat associated with 6 h/day sitting may not be offset by achieving recommended levels of physical activity.

关键词： Adults Body fat distribution Physical activity Sitting time