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A comprehensive analysis of the response of the fungal community structure to long-term continuous cropping in three typical upland crops

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Journal of Integrative Agriculture 2020年第3期19卷 866-880页

作者： LIU Hang PAN Feng-juan HAN Xiao-zeng song Feng-bin ZHANG Zhi-ming yan Jun XU yan-li National Observation Station of Hailun Agro-ecology System/Key Laboratory of Mollisols Agroecology Northeast Institute of Geography and AgroecologyChinese Academy of SciencesHarbin 150081P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

Certain agricultural management practices are known to affect the soil microbial community structure;however,knowledge of the response of the fungal community structure to the long-term continuous cropping and rotation of soybean,maize and wheat in the same agroecosystem is *** assessed the fungal abundance,composition and diversity among soybean rotation,maize rotation and wheat rotation systems and among long-term continuous cropping systems of soybean,maize and wheat as the effect of crop types on fungal community *** compared these fungal parameters of same crop between long-term crop rotation and continuous cropping systems as the effect of cropping systems on fungal community *** fungal abundance and composition were measured by quantitative real-time PCR and Illumina MiSeq *** results revealed that long-term continuous soybean cropping increased the soil fungal abundance compared with soybean rotation,and the fungal abundance was decreased in long-term continuous maize cropping compared with maize *** long-term continuous soybean cropping also exhibited increased soil fungal *** variation in the fungal community structure among the three crops was greater than that between long-term continuous cropping and rotation ***,Guehomyces and Alternaria were the most important contributors to the dissimilarity of the fungal communities between the continuous cropping and rotation cropping of soybean,maize and *** were 11 potential pathogen and 11 potential biocontrol fungi identified,and the relative abundance of most of the potential pathogenic fungi increased during the long-term continuous cropping of all three *** relative abundance of most biocontrol fungi increased in long-term continuous soybean cropping but decreased in long-term continuous maize and wheat *** results indicate that the response of the soil fungal community structure to long-term continuous cropping

关键词： continuous cropping crop rotation fungal community structure Illumina MiSeq sequencing

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中国式现代化视域下新质生产力的内涵要义、价值意蕴及未来指向

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长江师范学院学报 2025年第1期41卷 66-72页

作者：王青峰曾艳湖北省社会科学院哲学研究所湖北武汉430077 荆楚理工学院马克思主义学院湖北荆门448000

新质生产力是传统生产力的跃迁升级,是传统生产力三要素调整优化的最新成果,具有动态性,人民性和生态性。作为习近平经济思想的最新理论成果,新质生产力代表着先进生产力的发展方向,为中国经济的高质量发展提供内生动力,有利于推动国家... 详细信息

新质生产力是传统生产力的跃迁升级,是传统生产力三要素调整优化的最新成果,具有动态性,人民性和生态性。作为习近平经济思想的最新理论成果,新质生产力代表着先进生产力的发展方向,为中国经济的高质量发展提供内生动力,有利于推动国家安全的强有力维护,促进中国式现代化的纵深演进。面对世界百年未有之大变局,立足当下中国的具体实际,我国应该培育创新型人才,促进传统产业和新型产业的同频共振,合理运用国际国内资源,积极开展国际交流合作,推动新质生产力的跨越式发展。

关键词：新质生产力马克思主义创新中国式现代化

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Mesospheric tide comparisons at low latitudes observed by two collocated meteor radars

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Earth and Planetary Physics 2025年第1期9卷 54-68页

作者： Jian Li Wen Yi XiangHui Xue Jie zeng HaiLun Ye JianYuan Wang Jinsong Chen Na Li TingDi Chen Chinese Academy of Sciences(CAS)Key Laboratory of Geospace Environment Department of Geophysics and Planetary SciencesUniversity of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology Anhui Mengcheng Geophysics National Observation and Research StationUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical Science and Technology Harbin 150001China National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave PropagationQingdao 266107China Yunnan Kunming Electromagnetic Environment National Observation and Research Station Qujing Kunming 655000China

Accurate knowledge of mesospheric winds and waves is essential for studying the dynamics and climate in the mesosphere and lower thermosphere(MLT)*** this study,we conduct a comparative analysis of the mesosphere tidal results obtained from two adjacent meteor radars at low latitudes in Kunming,China,from November 2013 to December *** two radars operate at different frequencies of 37.5 MHz and 53.1 MHz,***,overall good agreement is observed between the two radars in terms of horizontal winds and tide *** results show that the dominant tidal waves of the zonal and meridional winds are diurnal and semidiurnal ***,we conduct an exhaustive statistical analysis to compare the tidal amplitudes and vertical wavelengths recorded by the dual radar systems,which reveals a high degree of alignment in tidal *** investigation includes variances and covariances of tidal amplitudes,which demonstrate remarkable consistency across measurements from both *** finding highlights clear uniformity in the mesospheric tidal patterns observed at low latitudes by the two neighboring meteor *** of the comparative analysis specifically underscore the significant correlation in vertical wavelength measurements,validating the robustness of radar observations for tidal research.

关键词： mesosphere and lower thermosphere region meteor radar mesospheric winds tides

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区域视角下跨境电商产业集聚效率研究——基于超效率SBM-Malmquist模型分析

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江苏商论 2025年第1期 43-47,52页

作者：曾雯汪明艳上海工程技术大学管理学院上海201620

跨境电商在国际贸易转型发展中起着至关重要的作用,而长三角、京津冀、珠三角区域作为中国跨境电商头部经济区在外贸中表现十分活跃。因此为进一步了解跨境电商产业集聚状况,本文选取2016—2021年长三角、京津冀、珠三角三大经济区面板... 详细信息

跨境电商在国际贸易转型发展中起着至关重要的作用,而长三角、京津冀、珠三角区域作为中国跨境电商头部经济区在外贸中表现十分活跃。因此为进一步了解跨境电商产业集聚状况,本文选取2016—2021年长三角、京津冀、珠三角三大经济区面板数据,运用超效率SBM-Malmquist模型从静态和动态两个维度对三大经济区跨境电商集聚效率进行评价。结果显示,跨境电商集聚效率整体表现为珠三角>长三角>京津冀,而纯技术效率和规模效率是拉开差异的主要原因。应该着力推动跨境电商集群均衡发展,加强三大经济区内特色品牌和优势资源互通、技术扩散和知识溢出,强化区域间协同合作。

关键词：跨境电商产业集聚三大经济区超效率SBM-Malmquist模型

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Synthesis of a hypocrellin B-polyamide conjugate as DNA-targeting photosensitizer

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Chinese Chemical Letters 2008年第2期19卷 157-160页

作者： yan yan Liu Sheng Qin Xia Zhang Hua zeng Rui Qiao Xue song Wang Bao Wen Zhang Lab of Organic Optoelectronic Functional Materials and Molecular Engineering Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100080 PR China Graduate School of Chinese Academy of Sciences Beijing 100049 PR China

A new hypocrellin B （HB） derivative bearing a bispyrrolecarboxamide-containing side chain was synthesized, which presents improved absorptivity in phototherapeufic window than HB and affinity feature towards dsDNA.

关键词： Hypocrellin Polyamide Groove binding DNA affinity

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考虑差价合同交易的电力市场均衡模型

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上海大学学报（自然科学版） 2001年第4期7卷 349-352页

作者：王长军张少华李渝曾言茂松上海大学机械电子工程与自动化学院上海200072

基于线性供应函数均衡的方法 ,考虑发电商具有非零截距边际成本函数 ,建立了考虑差价合同市场的电力市场均衡模型 .理论分析和算例结果表明 ,电力市场中远期合同市场交易有助于减少发电商利用市场力来操纵市场的行为。

关键词：电力市场差价合同均衡模型线性供应函数均衡非零截距边际成本函数电力工业

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The critical role of energetic fluctuations in charge separation for efficient molecular doping of organic semiconductors

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Science China Chemistry 2024年第11期67卷 3675-3680页

作者： yan zeng Guangchao Han Yuanping Yi Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Molecular doping is essential to improve the electrical conductivity of organic semiconductors for high-performance organic electronic devices. However, the doping efficiency is influenced by several factors, such as the energy levels, energetic fluctuations, dielectric properties, and molecular packing structures of the doped films, and the underlying mechanisms for highefficiency doping are still unclear. Here, through multi-level theoretical simulations on a series of fullerene derivatives, we identify that the energetic fluctuations can play a decisive role in activating charge separation for molecular doping. In particular,the doping efficiency appears to be exponentially increased with the fluctuation of charge polarization energies. Therefore,although the charge mobility is somewhat decreased, the experimental electrical conductivity is improved with the increased energetic fluctuation. Moreover, it has been found that polarization energy fluctuation can be effectively enhanced by simply introducing side chains with greater flexibility into organic semiconductors. This article paves the way towards high-efficiency molecular doping of organic semiconductors.

关键词： doping efficiency polarization energies energetic fluctuations organic semiconductors

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Dynamic shared segment protection algorithm with differentiated reliability in GMPLS networks

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Journal of Systems Engineering and Electronics 2009年第1期20卷 178-184页

作者： Wang yan Zheng Junhu zeng Jiazhi Coll. of Computer Science and Engineering Univ. of Electronic Science and Technology of China Chengdu 610054 P. R. China Coll. of Computer Science and Technology Southwest Univ. for Nationalities Chengdu 610041 P. R. China.

To improve the resource utilization ratio and shorten the recovery time of the shared path protection with differentiated reliability （SPP-DiR） algorithm, an algorithm called dynamic shared segment protection with differentiated reliability （DSSP-DiR） is proposed for survivable GMPLS networks. In the proposed algorithm, a primary path is dynamically divided into several segments according to the differentiated reliability requirements of the customers. In the SPP-DiR algorithm, the whole primary path should be protected, while in the DSSP- DiR algorithm, only partial segments on the primary path need to be protected, which can reduce more backup bandwidths than that in the SPP-DiR algorithm. Simulation results show that the DSSP-DiR algorithm achieves higher resource utilization ratio, lower protection failure probability, and shorter recovery time than the SPP-DiR algorithm.

关键词： generalized multiprotocal label switching segment protection differentiated reliability resource uti-lization ratio.

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New SRLG-diverse path selection algorithm in survivable GMPLS networks

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Journal of Systems Engineering and Electronics 2009年第2期20卷 412-419页

作者： Wang yan Zheng Junhui zeng Jiazhi Coll. of Computer Science and Engineering Univ. of Electronic Science and Technology of China Chengdu 610054 P. R. China Coll. of Computer Science and Technology Southwest Univ. for Nationalities Chengdu 610041 P. R. China

In conventional shared risk link group （SRLG）-diverse path selection （CSPS） algorithm in survivable GMPLS networks, SRLG is taken into account when selecting the backup paths, while the primary path selection method is the sarne as the algorithms without SRLG constraint. A problem of CSPS algorithm is that, after a primary path is selected, the success probability to select an SRLG-diverse backup path for it is low. If SRLG is taken into account when computing the primary path, then the probability to successfully select an SRLG-diverse backup path will be much increased. Based on this idea, an active SRLG-diverse path selection （ASPS） algorithm is proposed. To actively avoid selecting those SRLG links, when computing the primary path, a link that share risk with more links is assigned a larger link cost. To improve the resource utilization ratio, it is permitted that the bandwidth resources are shared among backup paths. What is more, differentiated reliability （DiR） requirements of different customers are considered in ASPS algorithm. The simulation results show that, compared with CSPS algorithm, ASPS algorithm not only increases successful protection probability but also improves resource utilization ratio.

关键词： generaliged multiprotocol label switching shared risk link group path selection survivability

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Impact of the Urban Heat Island Effect on Ozone Pollution in Chengdu City,China

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Chinese Geographical Science 2023年第6期33卷 1017-1032页

作者： SHI Haoyuan song Xingtao zeng Shenglan Plateau Atmosphere and Environment Key Laboratory of Sichuan Province Chengdu Plain Urban Meteorology and Environment Observation and Research Station of Sichuan ProvinceSchool of Atmospheric SciencesChengdu University of Information TechnologyChengdu610225China

With the advancement of urbanization,the urban heat island effect and ozone pollution have become hot issues in urban *** urban heat island effect can impact ozone conversion,but its mechanism of action is *** this study,the effects of the urban heat island effect on ozone concentration in Chengdu City,China,were investigated by comparing the ozone concentration under different heat island levels with ozone data from March 2020 to February 2021 and the temperature and wind field data of ERA5-Land during the same *** results showed that:1)regarding the distribution characteristics,the ozone concentration in Chengdu presented a‘high in summer and low in winter’*** ozone concentration in summer(189.54µg/m^(3))was nearly twice that in winter(91.99µg/m^(3)),and the ozone diurnal variation presented a‘single peak and single valley’distribution,with a peak at 16:00.2)For the characteristics of the heat island effect,the heat island intensity in Chengdu was obviously higher in spring than in other seasons,and the diurnal variation showed a‘single peak and single valley’distribution,with the peak and trough values appearing at 9:00 and 17:00,***,the eastern part of Chengdu was a heat island,while the western and northwestern parts were mostly cold island.3)The correlation analysis between heat island intensity and ozone concentration showed a significant positive correlation but with a 7–8 h time *** air temperature was not the main factor affecting ozone *** heat island effect impacts the ozone concentration in two ways:changing the local heat budget to promote ozone generation and forming local urban wind,which promotes ozone diffusion or accumulation and forms different areas of low and high ozone values.

关键词： ozone pollution urban heat island effect heat island intensity lag correlation Chengdu,China

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