检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

新质生产力发展评价指标体系构建

经济体制改革 2024年第3期 5-15页

作者：蒋永穆乔张媛四川大学经济学院四川成都610065 四川大学马克思主义学院四川成都610065

新质生产力作为高质量发展的重要着力点,需建立相应指标体系指导其加快发展、统筹推进。根据习近平总书记对新质生产力的概念阐释,结合新质生产力发展实际情况,从理论基础、根本目标、基本原则和本质要求四个方面深入剖析新质生产力发... 详细信息

新质生产力作为高质量发展的重要着力点,需建立相应指标体系指导其加快发展、统筹推进。根据习近平总书记对新质生产力的概念阐释,结合新质生产力发展实际情况,从理论基础、根本目标、基本原则和本质要求四个方面深入剖析新质生产力发展评价指标体系的理论逻辑,并以此为基础初步构建反映新发展理念多维要求、体现新质生产力关键特征、符合新质生产力先进本质的新质生产力发展评价指标体系,为新质生产力研究转向定性与定量相结合进行有益尝试,力求为培育和形成新质生产力提供测度标准和行动参考。

关键词：新质生产力评价指标体系理论逻辑行动参考

Potassium alleviated high nitrogen-induced apple growth inhibition by regulating photosynthetic nitrogen allocation and enhancing nitrogen utilization capacity

在线全文

学校读者我要写书评

暂无评论

Horticultural Plant Journal 2024年第1期10卷 1-14页

作者： Xinxiang Xu Guangyuan Liu Jingquan Liu Mengxue Lyu Fen Wang Yue Xing Hao Meng Min Li Yu jiang Ge Tian Zhanling Zhu Yuanmao jiang Shunfeng Ge State Key Laboratory of Crop Biology College of Horticulture Science and EngineeringShandong Agricultural UniversityTai'anShandong 271018China Key Laboratory of Biochemistry and Molecular Biology in Universities of Shandong College of Biological and Agricultural EngineeringWeifang UniversityWeifangShandong 261061China

There is a close relationship between potassium(K)and nitrogen(N).However,the roles of K under high N conditions remain *** a hydroponics approach,we monitored the morphological,physiological,and molecular changes in M9T337 apple(Malus domestica)rootstocks under different nitrate(10 and 30 mmol·L^(-1)NO_(3)^(-))and K supply(0.5,6,10,and 20 mmol·L_(-1)K^(+))*** revealed that high nitrate inhibited the root growth of M9T337 rootstocks,downregulated the expressions of K transporter genes(MdPT5,MdHKT1,and MdATK1),and reduced the net NO3-and K+influx at the surface of roots,thereby resulting in an N/K imbalance in *** investigation showed that 10 mmol·L^(-1)K increased the activity of N metabolic enzymes(NR,GS,NiR,and GOGAT),upregulated the expressions of genes related to nitrate uptake and transport(MdNRT1.1,MdNRT1.2,MdNRT1.5,and MdNRT2.4),promoted15N transport from the roots to the shoots,optimized leaf N distribution,and improved photosynthetic N utilization efficiency under high nitrate *** results suggest that the negative effects of high nitrate may be related to the N/K imbalance and that reducing N/K in plants by increasing K supply level can effectively alleviate the inhibition of N assimilation by high nitrate stress.

关键词： Apple rootstock K level High nitrate stress N metabolism ^(15)N

Environmental characteristics of trace metals in seawater from the Ninety East Ridge in the Indian Ocean

在线全文

学校读者我要写书评

暂无评论

JOURNAL OF OCEANOLOGY AND LIMNOLOGY 2024年第4期42卷 1-11页

作者： Li, Jingxi Zhang, Di jiang, Fenghua Chen, Hong Cao, Wei Sun, Chengjun Minist Nat Resources Inst Oceanog 1 Key Lab Marine Ecoenvironm Sci & Technol Qingdao 266061 Peoples R China Shandong Univ Sci & Technol Coll Safety & Environm Engn Qingdao 266590 Peoples R China Laoshan Lab Marine Sci & Technol Lab Marine Drugs & Biol Prod Qingdao 266235 Peoples R China

The Ninety East Ridge in the Indian Ocean has complex and unique characteristics. The concentrations and distribution characteristics of 10 trace metals (V, Cr, Mn, Fe, Co, Ni, Cu, Cd, Pb, and U) in seawater from the Ninety East Ridge in the Indian Ocean were investigated. Results show that the average concentrations of different trace metals in all the collected seawater samples were 1.134 mu g/L for V, 0.158 mu g/L for Cr, 0.489 mu g/L for Mn, 0.427 mu g/L for Fe, 0.011 mu g/L for Co, 0.395 mu g/L for Ni, 0.403 mu g/L for Cu, 0.097 mu g/L for Cd, 0.139 mu g/L for Pb, and 3.470 mu g/L for U. Differences in the horizontal and vertical distributions of all measured trace metals were revealed, and the occurrence of high concentrations was nonuniform. In addition, the significant differences in the concentration distribution of different trace metals in seawater on both sides of the Ninety East Ridge present regional segmentation in the area for various trace metals in deep sea water. This study provided basic data for future investigations on the environmental and ecological impact of trace metals in the Indian Ocean and the potential water mass transport mechanism.

关键词： trace metal environmental characteristic Ninety East Ridge seawater Indian Ocean PARTICULATE HEAVY-METALS SUBTROPICAL GYRE REGION BAY EQUATORIAL GEOTRACES NORTHERN ELEMENTS SEA ZN CD

2-5 μ m High- Power Fluoroindate- Based Transmitting Energy Fiber

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

CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG 2024年第11期51卷 405-409页

作者： Zhao, Wenkai Zhang, Longfei Wang, Zaiyang Liu, Ruite Hu, Linjia jiang, Yiguang Zhang, Long Chinese Acad Sci Shanghai Inst Opt & Fine Mech Res Ctr Infrared Opt Mat Shanghai 201800 Peoples R China

Objective The mid - infrared band of 2-5 p.m, which contains the atmospheric transmission window and the fingerprint absorption peaks of many molecules, holds vast potential applications in areas such as biomedicine, precision machining, and mid - infrared photoelectrical countermeasures. Although high - power mid - infrared lasers can be generated using methods such as nonlinear frequency conversion, the existing devices are often bulky and structurally complex, making them unsuitable for scenarios with complex optical paths or spatial constraints. Optical fibers, as an excellent and flexible light guide medium, can realize miniaturized and lightweight systems and have been widely studied. The materials mainly used for optical fibers include silicate glass, tellurite glass, fluoride glass, and sulfide glass. Among them, silicate glass fibers have an infrared cut - off edge at approximately 2.5 p.m, making them unable to transmit lasers in the mid - infrared range. Tellurite glass fibers exhibit significant intrinsic absorption in the wavelength range greater than 4 mu m, leading to rapid increases in loss and an inability to meet low - loss transmission in the 2-5 mu m full spectrum. Sulfide fibers have a broader infrared transmission range; nevertheless, the absorption bands caused by S -H and Se -H bonds are challenging to eliminate, resulting in higher average loss in the 2-5 mu m wavelength range. Currently, the main choice for low - loss transmission across the entire 2-5 mu m range is fluoroindate fiber (InF 3 - based fiber). This study introduces the design and preparation of InF 3 - based fibers suitable for high - power mid - infrared laser transmission. Methods The early investigation by the research team on the crystallization behavior of fluoroindate glass indicated that in the molten state of multi - component InF 3 - based glass, high field strength fluoride cations compete for the nearby fluoride ions, leading to phase separation. The formation of ph

关键词： materials fluoroindate fiber transmitting energy fiber mid- infrared laser

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

与桥梁抗震规范设计反应谱一致的地震动合成

工程抗震与加固改造 2024年第2期46卷 68-76页

作者：范立朋姜云木广东盛翔交通工程检测有限公司广东广州511400 广东省交通规划设计研究院集团股份有限公司广东广州511400 武汉工程大学土木工程与建筑学院湖北武汉430074

工程上在对结构进行动力响应分析时,大多是在实测强震数据库中筛选出与规范设计反应谱相一致的实测强震记录作为地震动输入依据,然而,实测强震记录数量有限,需要系统地处理才可投入工程应用,且在对大型工程结构进行动力反应分析时无法... 详细信息

工程上在对结构进行动力响应分析时,大多是在实测强震数据库中筛选出与规范设计反应谱相一致的实测强震记录作为地震动输入依据,然而,实测强震记录数量有限,需要系统地处理才可投入工程应用,且在对大型工程结构进行动力反应分析时无法体现地震动的空间变异性,因此,本文以《公路桥梁抗震设计规范》(JTG/T 2231-01-2020)中的设计反应谱为例,详细梳理了地震动向量过程的本征正交分解方法(POD)和复相干函数模型,并将反应谱转化功率谱法和调幅功率谱迭代法相结合,基于降维模拟方法,在概率层面上高效地生成了与设计反应谱相一致且具有空间变异性和非平稳性的人工地震动向量过程。数值算例表明,根据目标反应谱转化为调幅功率谱后,再根据功率谱迭代法迭代一次生成的地震动样本与目标反应谱对应良好,同时,降维方法生成的地震动样本具有显著的非平稳性和空间变异性,且统计特征与目标值对应良好。可以认为,本文为桥梁结构在地震作用下的地震激励输入提供了新的途径。

关键词：地震动向量过程调幅功率谱模型人工地震动合成桥梁抗震设计规范功率谱迭代

Transcription factor OsSPL10 interacts with OsJAmyb to regulate blast resistance in rice

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2024年第1期12卷 301-307页

作者： Zaofa Zhong Lijing Zhong Xiang Zhu Yimin jiang Yihong Zheng Tao Lan Haitao Cui College of Life Science Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Key Laboratory of Genetics Breeding and Multiple Utilization of CropsMinistry of EducationCollege of AgricultureFujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Fujian Provincial Key Laboratory of Crop Breeding by Design Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina College of Plant Protection Shandong Agricultural UniversityTai’an 271018ShandongChina

Transcription factors(TFs)play essential roles in transcriptional reprogramming during activation of plant immune responses to ***10(SQUAMOSA promoter binding protein-like10)is an important TF regulating trichome development and salt tolerance in *** we report that knockout of OsSPL10 reduces whereas its overexpression enhances rice resistance to blast ***10 positively regulates chitin-induced immune responses including reactive oxygen species(ROS)burst and callose *** show that OsSPL10 physically associates with OsJAmyb,an important TF involved in jasmonic acid(JA)signaling,and positively regulates its protein *** then prove that OsJAmyb positively regulates resistance to *** results reveal a molecular module consisting of OsSPL10 and OsJAmyb that positively regulates blast resistance.

关键词： Immunity Jasmonate Oryza sativa OsSPL10 Transcription factor

基于复变函数理论的无中导连拱隧道应力与位移解析解

在线全文

学校读者我要写书评

暂无评论

岩土力学 2024年第3期45卷 777-787页

作者：毕钛俊邓琴汤华姜成业秦雨樵中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室湖北武汉430071 中国科学院大学北京100049

无中导连拱隧道由于后行洞衬砌搭接于先行洞衬砌拱腰之上,围岩与衬砌受力情况复杂,开展相应的围岩与衬砌应力和位移分析具有重要的工程意义。基于复变函数理论和Schwarz交替法,提出了深埋条件下考虑衬砌的无中导连拱隧道围岩与衬砌应力... 详细信息

无中导连拱隧道由于后行洞衬砌搭接于先行洞衬砌拱腰之上,围岩与衬砌受力情况复杂,开展相应的围岩与衬砌应力和位移分析具有重要的工程意义。基于复变函数理论和Schwarz交替法,提出了深埋条件下考虑衬砌的无中导连拱隧道围岩与衬砌应力和变形的计算方法。针对无中导连拱隧道两洞具有共用边界的特点,在利用柯西积分法进行求解时,将单洞衬砌与围岩接触的边界积分条件转化为仅存在单洞时的完整边界积分与共用边界积分之差,对于Schwarz交替法中求解“附加面力”的过程亦进行类似处理。给出共用边界应力与位移的计算方法。通过算例,将上述解析结果和数值仿真结果进行对比,证明了方法的可行性和准确性。

关键词：无中导连拱隧道复变函数 Schwarz交替法应力场位移场

浅埋无中导洞连拱隧道先行洞衬砌承担围岩荷载确定方法

在线全文

学校读者我要写书评

暂无评论

岩土力学 2024年第4期45卷 1170-1180页

作者：汤华姜成业邓琴毕钛俊秦雨樵中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室湖北武汉430071 中国科学院大学北京100049

不同于常规隧道衬砌结构,无中导洞连拱隧道先行洞衬砌施作稳定后还要受到邻近后行洞开挖的二次扰动,后行洞开挖对先行洞衬砌受力的影响不可忽视。依托杨家寨公路隧道工程,基于考虑了后行洞开挖影响的隧道围岩压力计算方法,结合现场监测... 详细信息

不同于常规隧道衬砌结构,无中导洞连拱隧道先行洞衬砌施作稳定后还要受到邻近后行洞开挖的二次扰动,后行洞开挖对先行洞衬砌受力的影响不可忽视。依托杨家寨公路隧道工程,基于考虑了后行洞开挖影响的隧道围岩压力计算方法,结合现场监测位移数据采用荷载-结构法进行位移反分析,提出了一种确定浅埋无中导洞连拱隧道先行洞衬砌承担围岩荷载的方法,最后和衬砌背后围岩荷载现场监测值进行对比验证。研究结果表明:后行洞开挖对先行洞衬砌承担围岩荷载的影响较为显著,监测点增长幅度均值高达142%;先行洞衬砌受力呈现“拱腰较小,拱顶及拱肩较大”的分布规律,且靠近后行洞一侧拱肩位置受力最大;通过现场监测位移反分析得到的先行洞衬砌受力结果和现场监测结果较为一致,论证了该方法的合理性和实用性,研究成果可为无中导洞连拱隧道结构设计提供参考。

关键词：荷载结构法无中导洞连拱隧道位移反分析衬砌受力

FirmDep:利用动态分析的嵌入式应用托管方案

在线全文

学校读者我要写书评

暂无评论

软件学报 2024年第08期35卷 3591-3609页

作者：吴华茂姜木慧周亚金李金库浙江大学计算机科学与技术学院香港理工大学电子计算学系西安电子科技大学网络与信息安全学院

固件托管(firmwarerehosting)是一种对嵌入式设备的软硬件进行建模和仿真,并在仿真环境中运行和分析嵌入式设备软件的技术.现有的基于全系统仿真的固件托管方案只能预防性地修复已知的软硬件依赖问题,而无法解决未知的问题.为应对这一现... 详细信息

固件托管(firmwarerehosting)是一种对嵌入式设备的软硬件进行建模和仿真,并在仿真环境中运行和分析嵌入式设备软件的技术.现有的基于全系统仿真的固件托管方案只能预防性地修复已知的软硬件依赖问题,而无法解决未知的问题.为应对这一现状,提出了一种由动态分析辅助的固件托管方案FirmDep.在托管过程中,FirmDep对被分析应用的执行轨迹和系统状态进行记录.若目标应用无法被成功托管, FirmDep对执行轨迹进行信息提取和系统状态补全,并使用多种执行轨迹分析方法识别和仲裁应用的环境依赖问题.基于PANDA和angr实现了FirmDep的原型系统,并使用217个来自真实设备固件的嵌入式Web应用对其进行了测试.结果表明:FirmDep可有效识别嵌入式设备应用的环境依赖问题,提高固件托管的成功率.

关键词：嵌入式设备固件动态分析固件托管录制重放