检索结果-南通市图书馆

Nano Research 2023年第2期16卷 3326-3332页

作者： Xingyuan Du Xiangxin li Yuxuan Zhang Xinyi Guo zhengji li Yanxia Cao Yanyu Yang Wanjie Wang Jianfeng Wang College of Materials Science and Engineering Henan Key Laboratory of Advanced Nylon Materials and ApplicationZhengzhou UniversityZhengzhou 450001China China Construction Seventh Engineering Division Corp.Ltd. Zhengzhou 450004China

Visible transparent yet low infrared-emissivity(ε)polymeric materials are highly anticipated in many applications,whereas the fabrication of which remains a formidable ***,visible transparent,flexible,and low-εpolymeric films were fabricated by nanocoating decoration of indium tin oxide(ITO)and MXene on polyethylene terephthalate(PET)film surface through magnetron sputtering and spray coating,*** obtained PET-ITO@MXene(PET-IM)film exhibits lowεof 24.7%and high visible transmittance exceeding 50%,endowing it with excellent visible transparent infrared stealthy by reducing human skin radiation temperature from 32 to 20.8°C,and remarkable zero-energy passive radiative heating capability(5.7°C).Meanwhile,the transparent low-εPET-IM film has high solar absorptivity and electrical conductivity,enabling superior solar/electric to thermal conversion ***,the three heating modes of passive radiative and active solar/electric can be integrated together to cope with complex heating *** visible transparent low-εpolymeric films are highly promising in infrared stealth,building daylighting and thermal management,and personal precision heating.

关键词： transparent polymeric film nanocoating decoration ITO@MXene low infrared emissivity passive radiative heating solar/electric heating

Carotenoid isomerase regulates rice tillering and grain productivity by its biosynthesis pathway

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第2期66卷 172-175页

作者： Chaoqing Ding zhengji Shao Yuping Yan Guangheng Zhang Dali Zeng li Zhu Jiang Hu Zhenyu Gao Guojun Dong Qian Qian Deyong Ren State Key Laboratory of Rice Biology and Breeding ChinaNational Rice Research InstituteHangzhou 310006China

Tillers are unique inflorescence-like branches in grasses,and their number determines the panicle number,plant architecture,and yield(Shang et al.,2021).Tiller formation mainly undergoes axillary meristem(AM)initiation and tiller bud outgrowth(Wang et al.,2018;Yan et al.,2023).The rice(Oryza sativa)KNOX gene OSH1 is expressed in AMs,and an osh1 mutant produces fewer tillers(Tanaka et al.,2015).

关键词： sativa Oryza panicle

The genetic basis and process of inbreeding depression in an elite hybrid rice

在线全文

学校读者我要写书评

暂无评论

Science China(life Sciences) 2024年第8期67卷 1727-1738页

作者： Xiaodong Xu Yawen Xu Jian Che Xu Han zhengji Wang Xianmeng Wang Qinghua Zhang Xu li Qinglu Zhang Jinghua Xiao Xianghua li Qifa Zhang Yidan Ouyang National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research(Wuhan) Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China

Inbreeding depression refers to the reduced performance arising from increased homozygosity,a phenomenon that is the reverse of heterosis and exists among plants and *** a natural self-pollinated crop with strong heterosis,the mechanism of inbreeding depression in rice is largely *** understand the genetic basis of inbreeding depression,we constructed a successive inbreeding population from the F_(2)to F_(4)generation and observed inbreeding depression of all heterotic traits in the progeny along with the decay of heterozygosity in each *** expected depression effect was largely explained by 13 QTLs showing dominant effects for spikelets per panicle,11 for primary branches,and 12 for secondary branches,and these loci constitute the main correlation between heterosis and inbreeding ***,the genetic basis of inbreeding depression is also distinct from that of heterosis,such that a biased transmission ratio of alleles for QTLs with either dominant or additive effects in four segregation distortion regions would result in minor effects in expected ***,two-locus interactions may change the extent and direction of the depression effects of the target loci,and overall interactions would promote inbreeding depression among *** an F_(2:3)variation population,the actual performance of the loci showing expected depression was evaluated considering the heterozygosity decay in the background after *** found inconsistent or various degrees of background depression from the F_(2)to F_(3)generation assuming different genotypes of the target locus,which may affect the actual depression effect of the locus due to *** results suggest that the genetic architecture of inbreeding depression and heterosis is closely linked but also differs in their intrinsic mechanisms,which expand our understanding of the whole-genome architecture of inbreeding depression.

关键词： rice inbreeding depression spikelet development dominance segregation distortion epistasis

在线全文

学校读者我要写书评

暂无评论

高效低耗组合模架体系试验研究

施工技术 2014年第23期43卷 29-33页

作者：汪芳李证吉武汉理工大学华夏学院湖北武汉430223 中建四局第五建筑工程有限公司贵州贵阳550003

高效低耗组合模架体系作为新型水平模板脚手架支撑体系,其主要特点为安拆快速,实现早拆,与塑料工字背楞和塑料模板配合使用实现脚手架施工高效低耗。试验采用足尺架体搭设,通过对整个架体在混凝土浇筑过程中施工荷载及其模板早拆后两个... 详细信息

高效低耗组合模架体系作为新型水平模板脚手架支撑体系,其主要特点为安拆快速,实现早拆,与塑料工字背楞和塑料模板配合使用实现脚手架施工高效低耗。试验采用足尺架体搭设,通过对整个架体在混凝土浇筑过程中施工荷载及其模板早拆后两个工作状态对横杆、立杆、塑料模板和塑料工字背楞的影响进行全程应力、应变、位移监控测试,得出施工荷载及早拆后高效低耗组合模架体系力学性能和工程实用性能。

关键词：模板脚手架模板支撑体系足尺试验应力应变力学性能

在线全文

学校读者我要写书评

暂无评论

贵阳国际金融中心绿色施工技术

施工技术 2015年第10期44卷 36-38,64页

作者：刘云李证吉湖北文理学院建筑工程学院湖北襄阳441053 中建四局第五建筑工程有限公司贵州贵阳550003

绿色施工是可持续发展战略在工程施工方面的主要体现,是可持续建筑工业的重要组成,是当前我国建筑业发展的方向,是一种对环境保护要求更高的新施工模式。依托贵阳国际金融中心实施住房和城乡建设部绿色施工科技示范工程,总结了本项目所... 详细信息

绿色施工是可持续发展战略在工程施工方面的主要体现,是可持续建筑工业的重要组成,是当前我国建筑业发展的方向,是一种对环境保护要求更高的新施工模式。依托贵阳国际金融中心实施住房和城乡建设部绿色施工科技示范工程,总结了本项目所采用的绿色施工技术及取得的成效,并在此基础上提炼工程实施过程中在新技术应用、绿色施工控制、绿色管理理念等方面的思路、方法,以期对绿色施工的发展、规划及实施给出一些建议。

关键词：绿色建筑绿色施工新技术节能环保质量控制

在线全文

学校读者我要写书评

暂无评论

高效低耗水平模架支撑体系承载力研究

施工技术 2016年第8期45卷 123-126页

作者：李证吉袁新和中建四局第五建筑工程有限公司贵州贵阳550003

高效低耗水平模板脚手架支撑体系以实现快拆快支、一键连、无零部件施工为特点,同时具有早拆功能,与塑料工字背楞和塑料模板配合使用实现模板脚手架施工高效低耗的效果。根据足尺试验得到的相关试验数据确定架体整体刚度,并建立有限元模... 详细信息

高效低耗水平模板脚手架支撑体系以实现快拆快支、一键连、无零部件施工为特点,同时具有早拆功能,与塑料工字背楞和塑料模板配合使用实现模板脚手架施工高效低耗的效果。根据足尺试验得到的相关试验数据确定架体整体刚度,并建立有限元模型,脚手架节点采用半刚性方式。得到了在相关荷载规范框架内的最佳纵跨距、横跨距及步距组合,为该架体推广使用提供了理论支撑。考虑有无剪刀撑2种失稳模式,并探究该架体在这2种失稳模式情况下的安全使用高度。研究成果为高效低耗水平模架支撑体系技术规程修订提供理论基础。

关键词：模板脚手架高效低耗支撑承载力有限元分析

弹性碰撞双守恒方程的相图解法在物理竞赛中的应用

在线全文

学校读者我要写书评

暂无评论

物理教学 2022年第9期44卷 67-72页

作者：李正吉马攀梁雷西南大学附属中学校重庆400700

能量和动量的双守恒方程是中学阶段解决弹性碰撞问题常用的方程组,代入消元法是求解这类方程组常用的方法。但这种方法字母运算也较为繁琐,容易出错,特别在处理物理竞赛中涉及弹性碰撞问题时。本文给出两种用相图法解决物理竞赛中弹性... 详细信息

能量和动量的双守恒方程是中学阶段解决弹性碰撞问题常用的方程组,代入消元法是求解这类方程组常用的方法。但这种方法字母运算也较为繁琐,容易出错,特别在处理物理竞赛中涉及弹性碰撞问题时。本文给出两种用相图法解决物理竞赛中弹性碰撞问题的方法,可将动力学问题转化为几何学问题,从而达到简化问题情景的目的。

关键词：弹性碰撞双守恒方程物理竞赛相图

Recent advances in high-β_(N) experiments and magnetohydrodynamic instabilities with hybrid scenarios in the HL-2A Tokamak

在线全文

学校读者我要写书评

暂无评论

Fundamental Research 2022年第5期2卷 667-673页

作者： Wei Chen liming Yu Min Xu Xiaoquan Ji Zhongbing Shi Xiaoxue He zhengji li Yonggao li Tianbo Wang Min Jiang Shaobo Gong Jie Wen Peiwan Shi Zengchen Yang Kairui Fang Jia li Lai Wei Wulv Zhong Aiping Sun Jianyong Cao Xingyu Bai Jiquan li Xuantong Ding Jiaqi Dong Qingwei Yang Yi liu Longwen Yan Zhengxiong Wang Xuanru Duan Joint Laboratory for Fusion Product and Energetic Particle Southwestern Institute of PhysicsP.O.Box 432Chengdu 610041China Key Laboratory of Materials Modification by Beams of the Ministry of Education School of PhysicsDalian University of TechnologyDalian 116024China

Over the past several years,high-β_(N) experiments have been carried out on *** high-β_(N) is realized using double transport barriers(DTBs)with hybrid scenarios.A stationary high-β_(N) (>2)scenario was obtained by pure neutral-beam injection(NBI)*** high performance was also achieved,corresponding to β_(N)≥3,ne/ne_(G)∼0.6,H_(98)∼1.5,f_(bs)∼30%,q_(95)∼4.0,and𝐺∼*** high-β_(N) scenario was successfully modeled using integrated simulation codes,that is,the one modeling framework for integrated tasks(OMFIT).In high-𝛽𝑁plasmas,magnetohydrodynamic(MHD)instabilities are abundant,including low-frequency global MHD oscilla-tion with n=1,high-frequency coherent mode(HCM)at the edge,and neoclassical tearing mode(NTM)and Alfvénic modes in the *** some high-β_(N) discharges,it is observed that the NTMs with m/n=3/2 limit the growth of the plasma energy and decrease β_(N).The low-n global MHD oscillation is consistent with the coupling of destabilized internal(m/n=1/1)and external(m/n=3/1 or 4/1)modes,and plays a crucial role in triggering the onset of *** high-β_(N) on HL-2A suggests that core-edge interplay is key to the plasma confinement enhancement *** to enhance β_(N) will contribute to future plasma operation,such as international thermonuclear experimental reactor.

关键词： High-β_(N) Transport barrier Hybrid scenario Bootstrapcurrent Magnetohydrodynamic

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zekun li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： li metal batteries li dendrites Electrolyte additive

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

动量和机械能综合练习

物理教学探讨 2006年第6期24卷 52-56页

作者：李正吉西南大学附属中学重庆市400700

一、选择题1.对于做匀速圆周运动的物体,下面说法中正确的是A.动量改变,动能不变B.动量改变,动能改变C.动量不变,动能改变D.动能、动量都不变

关键词：重力势能轻弹簧弹性势能打点计时器机械能动量守恒定律动摩擦因数