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Integrative multi-omics approaches reveal that Asian cultivated rice domestication influences its symbiotic relationship with arbuscular mycorrhizal fungi

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Pedosphere 2024年第2期34卷 315-327页

作者： Lei TIAN jilin wang Hongping CHEN Weiqiang LI Lam-Son Phan TRAN Chunjie TIAN Key Laboratory of Mollisols Agroecology State Key Laboratory of Black Soils Conservation and UtilizationNortheast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China Rice Research Institute Jiangxi Academy of Agricultural SciencesNanchang 330200China Institute of Genomics for Crop Abiotic Stress Tolerance Department of Plant and Soil ScienceTexas Tech UniversityLubbock TX 79409USA

Potential changes in the symbiotic relationship between rice(Oryza sativa)and microorganisms have occurred during the domestication of Asian cultivated rice(***)from common wild rice(Oryza rufipogon)and in response to global climate change,along with evolving adaptations to the *** potential genes may express differently or dominate the symbiotic relationships between arbuscular mycorrhizal fungi(AMF)and plants,which may be beneficial to rice *** date,research on this important topic has been *** this study,we aimed to examine the symbiotic relationships of Asian common wild and cultivated rice species with *** conducting a comparative metagenomic analysis of the rhizospheres of wild and cultivated rice species,we identified differences in Rhizophagus intraradices-related genes associated with wild and cultivated rice,as well as functional genes of ***,we obtained root-related genes associated with AMF from transcriptome data of rice *** results collectively suggest that ***-related genes in the rhizosphere of wild rice may be more conducive to its ***,bacteria from the Nitrosomonadaceae and Nitrospiraceae families identified in the rhizosphere of wild rice exhibited positive correlations with ***-related genes with protein identifiers 1480749 and1871253,which may indicate that nitrobacteria can enhance the functions of *** in association with wild ***,in a case study using comparative transcriptome analysis of root samples obtained from ***-inoculated wild and cultivated rice plants,we found significantly higher expression levels of the strigolactone pathway-related genes DWARF3(D3)and DWARF14(D14)in ***-inoculated common wild rice than in ***-inoculated cultivated *** study provides a theoretical basis for identifying the effects of domestication on mycorrhizal symbiosis-related genes,which could be promoted in wi

关键词： Rhizophagus intraradices root-related gene symbiotic effect strigolactone wild rice

Boron nitride microribbons strengthened and toughened alumina composite ceramics with excellent mechanical,dielectric,and thermal conductivity properties

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Journal of Advanced Ceramics 2024年第4期13卷 496-506页

作者： jilin wang Dongping Lu Weiping Xuan Yuchun Ji Ruiqi Chen Shaofei Li Wenbiao Li Wenzhuo Chen Shilin Tang Guoyuan Zheng Fei Long Guangxi Key Laboratory of Optical and Electronic Materials and Devices Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of ResourcesSchool of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China Key Laboratory of New Processing Technology for Nonferrous Metals and Materials of Ministry of Education Guilin University of TechnologyGuilin 541004China School of Materials Science and Engineering Peking UniversityBeijing 100871China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityKowloon 999077Hong KongChina

Aluminum oxide(Al_(2)O_(3))ceramics have been widely utilized as circuit substrates owing to their exceptional *** this study,boron nitride microribbon(BNMR)/Al_(2)O_(3)composite ceramics are prepared using spark plasma sintering(SPS).This study examines the effect of varying the amount of toughened phase BNMR on the density,mechanical properties,dielectric constant,and thermal conductivity of BNMR/Al_(2)O_(3)composite ceramics while also exploring the mechanisms behind the toughening and increased thermal conductivity of the fabricated *** results showed that for a BNMR content of 5 wt%,BNMR/Al_(2)O_(3)composite ceramics displayed more enhanced characteristics than pure Al_(2)O_(3)*** particular,the relative density,hardness,fracture toughness,and bending strength were 99.95%±0.025%,34.11±1.5 GPa,5.42±0.21 MPa·m^(1/2),and 375±2.5 MPa,*** values represent increases of 0.76%,70%,35%,and 25%,respectively,compared with the corresponding values for pure Al_(2)O_(3)***,during the SPS process,BNMRs are subjected to high temperatures and pressures,resulting in the bending and deformation of the Al_(2)O_(3)matrix;this leads to the formation of special thermal pathways within *** dielectric constant of the composite ceramics decreased by 25.6%,whereas the thermal conductivity increased by 45.6%compared with that of the pure Al_(2)O_(3)*** results of this study provide valuable insights into ways of enhancing the performance of Al_(2)O_(3)-based ceramic substrates by incorporating novel BNMRs as a second *** improvements are significant for potential applications in circuit substrates and related fields that require high-performance materials with improved mechanical properties and thermal conductivities.

关键词： boron nitride microribbons/aluminum oxide(BNMRs/Al_(2)O_(3))composite ceramics boron nitride microribbon(BNMR) spark plasma sintering(SPS) strengthening and toughening thermal conductivity

Tensor Decomposition-Based Channel Estimation and Sensing for Millimeter Wave MIMO-OFDM V2I Systems

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ZTE Communications 2024年

作者： wang jilin ZENG Xianlong YANG Yonghui PENG Lin LI Lingxiang National Key Laboratory of Wireless Communications University of Electronic Science and Technology of China ZTE Corporation State Key Laboratory of Mobile Network and Mobile Multimedia Technology

An integrated sensing and communication (ISAC) scheme for a millimeter wave (mmWave) multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) Vehicle-to-Infrastructure (V2I) system is presented， in which both the access point (AP) and the vehicle equip large antenna arrays and employ hybrid analog and digital beamforming structures to compensate the path loss meanwhile compromise between hardware complexity and system performance. Based on the sparse scattering nature of the mmWave channel， the received signal at the AP is organized to a four-order tensor by the introduced novel frame structure. A CANDECOMP/PARAFAC (CP) decomposition-based method is proposed for time-varying channel parameter extraction， including angles of departure/arrival (AODs/AOAs)， Doppler shift， time delay and path gain. Then leveraging the estimates of channel parameters， a nonlinear weighted least-square problem is proposed to accurately recover the location， heading and velocity of vehicles. Simulation results show that the proposed methods are effective and efficient in time-varying channel estimation as well as vehicle sensing in mmWave MIMO-OFDM V2I systems.

关键词：

金山店铁矿-410 m水平主回风巷道稳定性分析

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现代矿业 2024年第7期40卷 94-99页

作者：王积林武钢资源集团金山店矿业有限公司

金山店铁矿目前正在回收-410 m水平残留矿体,掘进爆破过程中,主回风巷道会受到爆破振动的影响,存在安全隐患。为了安全合理地进行采矿活动,降低对回风巷道的影响,开展了3次爆破振动现场测试试验,使用最小二乘法线性拟合得到了金山店铁... 详细信息

金山店铁矿目前正在回收-410 m水平残留矿体,掘进爆破过程中,主回风巷道会受到爆破振动的影响,存在安全隐患。为了安全合理地进行采矿活动,降低对回风巷道的影响,开展了3次爆破振动现场测试试验,使用最小二乘法线性拟合得到了金山店铁矿的爆破振动衰减规律,确定采场掘进爆破对回风巷道围岩稳定性的影响程度较小。在此基础之上使用LS-DYNA数值模拟软件,模拟出不同爆源距离下的回风巷道围岩的应力、位移和振速衰减规律,确定了爆源距离对回风巷道围岩稳定性的影响程度,有助于保障矿山的稳定运营和经济持续发展。

关键词：残留矿体回收爆破振动巷道稳定性数值模拟

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含断层金属矿地压显现规律研究与防控措施

现代矿业 2024年第4期40卷 99-104,108页

作者：王积林武钢资源集团金山店矿业有限公司

断层是金属矿山采空区稳定性的薄弱环节,也是地压显现治理的难点。以金山店铁矿为背景,基于现场调研结果,借助微震监测与数值模拟相结合的方法,对含断层金属矿山的地压显现规律进行分析。结果表明,在构造应力和自重应力双重作用下,采空... 详细信息

断层是金属矿山采空区稳定性的薄弱环节,也是地压显现治理的难点。以金山店铁矿为背景,基于现场调研结果,借助微震监测与数值模拟相结合的方法,对含断层金属矿山的地压显现规律进行分析。结果表明,在构造应力和自重应力双重作用下,采空区附近断层对空区围岩稳定性有显著影响。断层位于采空区内部时,主要表现为穿过断层巷道的局部破坏,而对上下盘巷道影响较小;断层位于空区上盘时,随着空区面积增大或隔离矿柱宽度减小,会导致断层与空区间的矿柱应力集中区叠加,出现大范围屈服破坏。建议对过断层的巷道局部破坏部位采取二次支护的应对措施;对于断层与空区内的矿柱大范围屈服部位,则应尽量避开在应力集中区布设开拓和采准巷道。该研究结果可为治理含断层矿山地压显现提供参考。

关键词：金属矿山地下开采地压显现断层

基于冠醚改性脱乙酰甲壳素制备燃料电池用阴离子导电膜

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石油化工高等学校学报 2024年第2期37卷 66-72页

作者：年海歌郑旭莹高慧辛海王吉林辽宁石油化工大学环境与安全工程学院辽宁抚顺113001 康龙化成(北京)新药技术有限公司北京100176 抚顺伊科思新材料有限公司辽宁抚顺113000 抚顺矿业集团有限责任公司页岩炼油厂辽宁抚顺113115 辽宁石油化工大学石油化工学院辽宁抚顺113001

在碱性条件下,借助三氯甲烷(CHCl_(3))将醛基引入二苯并-18-冠-6(DB18C6)中,制得二甲酰基二苯并-18-冠-6(DDB18C6);以DDB18C6与可溶性脱乙酰甲壳素(CTS)为原料,利用Schiff反应合成了小分子冠醚质量分数递增的接枝冠醚CTS膜,将其命名为C_... 详细信息

在碱性条件下,借助三氯甲烷(CHCl_(3))将醛基引入二苯并-18-冠-6(DB18C6)中,制得二甲酰基二苯并-18-冠-6(DDB18C6);以DDB18C6与可溶性脱乙酰甲壳素(CTS)为原料,利用Schiff反应合成了小分子冠醚质量分数递增的接枝冠醚CTS膜,将其命名为C_(a)-CTS膜(a=m(DDB18C6)/m(C_(a)-CTS膜));将C_(a)-CTS膜于碱液中进行离子交换,C_(a)-CTS膜通过氧空穴结构吸附K^(+),进而制得C_(a)-CTSK膜;对各阶段的样品膜进行了结构表征和性能测试。结果表明,随着冠醚接枝度的增加,CTS的热稳定性得到改善;当a=0.20时,C_(0.20)-CTSK膜的接枝度可达43.91%,吸水率可达168.6%,IEC为1.38 mmol/g;在温度为70℃的条件下,C_(0.20)-CTSK膜的电导率可达46.8 m S/cm;冠醚的接枝引入改善了该系列膜的耐碱稳定性;C_(a)-CTSK系列膜在6 mol/L的KOH溶液中浸泡480 h,电导率降低幅度仅为4.0%。

关键词：脱乙酰甲壳素二甲酰基二苯并-18-冠-6 阴离子导电膜燃料电池冠醚

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水电工程主厂房防火防烟分区划分的探讨

暖通空调 2024年第3期54卷 24-27页

作者：王继琳林志勇中国电建集团水电水利规划设计总院北京中国电建集团华东勘测设计研究院有限公司杭州311122

鉴于《水电工程设计防火规范》修编过程中,对主厂房防火分区、防烟分区和疏散距离存在不同认识,本文从防火设计的基本理念出发,分析了水电工程的特殊性,同时采用性能化设计数模理论,确定了规范中防火分区、防烟分区面积,以及疏散通道长... 详细信息

鉴于《水电工程设计防火规范》修编过程中,对主厂房防火分区、防烟分区和疏散距离存在不同认识,本文从防火设计的基本理念出发,分析了水电工程的特殊性,同时采用性能化设计数模理论,确定了规范中防火分区、防烟分区面积,以及疏散通道长度的依据,探讨了水电工程的特点,为特殊工程防火设计规范编制提供参考。

关键词：水电工程防火分区防烟分区疏散距离性能化设计

基于专业主干课程考核成绩的毕业要求达成度评价探讨——以资源勘查工程专业为例

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中国地质教育 2024年第2期33卷 75-79页

作者：汪吉林傅雪海中国矿业大学资源与地球科学学院江苏徐州221116

毕业要求达成度评价是工程教育专业认证运行的重要环节。为了简便、有效地实施毕业要求达成度评价,本文在分析资源勘查工程专业课程体系的基础上,基于15门专业主干课程的成绩,运用层次分析法确定了各门课程的权重,计算了专业主干课程的... 详细信息

毕业要求达成度评价是工程教育专业认证运行的重要环节。为了简便、有效地实施毕业要求达成度评价,本文在分析资源勘查工程专业课程体系的基础上,基于15门专业主干课程的成绩,运用层次分析法确定了各门课程的权重,计算了专业主干课程的计权分,并结合毕业设计成绩,从理论知识和专业实践两个方面,评价了毕业要求达成度。使用该方法得出的评价具有效性和客观性。

关键词：资源勘查工程达成度评价毕业要求层次分析法专业主干课程

铰接式无人压路机能耗最优换道路径规划及实验

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机械设计与研究 2024年第3期40卷 110-115页

作者：唐俊豪金隼孙金泉王己林李冰段方正广西科技大学机械与汽车工程学院广西柳州545006 广西土方机械协同创新中心广西柳州545616 广西柳工机械股份有限公司广西柳州545007 上海交通大学机械与动力工程学院上海200240

无人化是铰接式压路机减轻人工作业负担、提高压实作业质量和效率的主要技术手段,但由于铰接式压路机整机吨位高、转向阻力大,依照常规车辆的换道路径进行循迹能耗较高。为此,针对铰接式压路机,提出了面向节能的最优换道路径规划方法,... 详细信息

无人化是铰接式压路机减轻人工作业负担、提高压实作业质量和效率的主要技术手段,但由于铰接式压路机整机吨位高、转向阻力大,依照常规车辆的换道路径进行循迹能耗较高。为此,针对铰接式压路机,提出了面向节能的最优换道路径规划方法,同时研究了该算法的实际换道效率及能耗。平坦路面施工现场开展实车实验,实验结果表明:采用INFO优化(Weighted mean of vectors algorithm)的五阶贝塞尔换道路径施工,在换道效率、换道行驶能耗、转向能耗等方面均表现良好。

关键词：铰接式压路机路径规划寻优算法能耗优化