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Contrasting beta diversity of spiders,carabids,and ants at local and regional scales in a black soil region,northeast China

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Soil Ecology Letters 2021年第2期3卷 103-114页

作者： MEIXIANG GAO YUXI GUO JIE LIU Jinwen Liu Sina Adi donghui wu Tingyu Lu Department of Geography and Spatial Information Techniques Ningbo UniversityNingbo 315211China Ningbo Universities Collaborative Innovation Center for Land and Marine Spatial Utilization and Governance Research at Ningbo University Ningbo 315211China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130012China College of Earth Science Jilin UniversityChangchun 130033China College of Land and Tourism Luoyang Normal UniversityLuoyang 471934ChinaCollege of Earth ScienceJilin UniversityChangchun 130033China Jilin Academy of Agricultural Sciences Changchun 130033China Department of Soil Science College of Agriculture and BioresourcesUniversity of Saskatchewan51 Campus DriveSaskatoonSK S7N5A8Canada

Understanding the factors determining the formation of each community and metacommunity across a landscape is one of the most important ideas in soil animal ***,the variables and parameters that shape soil arthropod communities in agroecosystems have not been *** arthropods can serve as important bioindicators of field management and its *** sampled five com plantations in each of three locations across a region spanning 600 km to come up with these determinants of the community structure of ground-dwelling spiders(Erigoninae:Araneae),carabids(Coleoptara:Carabidae),and ants(Hymenoptera:Formicidae).The analysis of the five fields within each of the three locations represent our local-scale samples,while the comparisons of the 15 sites across all three locations represent the regional scale *** tested the hypothesis that in the models we sampled,environmental/soil variables would drivecommunity assembly locally(within location comparisons),but at the regional scale(between location comparisons),climatic and spatial variables would drive metacommunity *** outcomes of our study showed distinct communities at each of the three locations when compared across regions but locally,fields were similar in species composition,as ***,spatial variables were important but not soil variables,regulated species richness and *** contributed more than nestedness to explain the biodiversity of spiders,carabids,and ants at both the local and regional *** purely climate variables,nor purely soil or spatial variables were significant enough explanations for the regional scale arthropod community ***,spatially structured environmental factors contributed most to explain the patterns supporting our *** conclude that biodiversity in this agroecosystem area can be promoted by a mosaic of land uses being encouraged to increase landscape complexity at the regional scale.

关键词： Species turnover Nestedness Community structure Agroecosystem

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Dynamically Securing the Data by^(1)O_(2)Sensitization of Fluorescent Composites with a High Latency and Uncrackable Features

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Chinese Journal of Chemistry 2024年第14期42卷 1651-1658页

作者： Yuanyuan Chen Jiamao Chen Huacan wu Yifan Liu donghui Wang Weiguo Huang College of Chemistry and Materials Science Fujian Normal UniversityFuzhouFujian350002 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences155 Yangqiao West RoadFuzhouFujian350002 China University of Chinese Academy of Sciences 19A Yuquan RoadBeijing100049 China

Dynamic fluorescent materials play a crucial role in secure inks for data encryption;however,they are still plagued by issues such as photodegradation,poor latency,and susceptibility to unauthorized ***,we propose a photochemically modulated dynamic fluorescent encryption system based on^(1)O_(2)sensitization of fluorescent composites,comprising a^(1)O_(2)-sensitive fluorophore(F2)and non-emissive *** UV irradiation,in-situ generated^(1)O_(2)from the polymer effectively binds with F2 to form endoperoxides(F2EPO),resulting in a significant redshift in emission,up to 150 ***^(1)O_(2)concentration is closely related to the irradiation time,rendering different fluorescent colors in a time-gated ***,the emission of F2EPO can be regulated by polymer chemical structure,molecular weight,and crosslinking *** on these merits,we develop a dynamic data encryption method with various non-emissive polymers as the data storage media,UV light irradiation as the data encoder,and F2 as the data *** light irradiation of diverse polymer solutions generates^(1)O_(2)at different concentrations,effectively encoding the data,which remains invisible under both UV and natural *** addition of F2 to these irradiated polymer solutions produces different redshifted fluorescence,enabling secure data *** to the non-emissive nature of the polymers,time-gated readout fashion,excellent latency of^(1)O_(2),and subtle interactions between^(1)O_(2)and F2,this data encryption is nearly *** work offers an advantage data encryption approach beyond the reach of conventional fluorophores.

关键词： Dynamic fluorescent materials Photochemically modulation ^(1)O_(2)-sensitive fluorophore High latency Data encryption Fluorescence Photochemistry Singlet oxygen

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Precipitation regulated soil nematode community and footprint in cropland ecosystems

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Soil Ecology Letters 2023年第4期5卷 19-28页

作者： Pingting Guan Jianan Li Cao Hao Jingjing Yang Lihong Song Ximei Niu Ping Wang Mohammad Mahamood donghui wu State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration School of EnvironmentNortheast Normal UniversityChangchun 130117China Key Laboratory of Vegetation Ecology Ministry of EducationNortheast Normal UniversityChangchun 130024China College of Agriculture Guizhou UniversityGuiyang 550025China Department of Biology Deanship of Educational ServicesQassim UniversityBuraydahSaudi Arabia Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization Northeast Normal UniversityChangchun 130117China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China

●Nematode abundance and footprint show unimodal patterns with precipitation levels.●MAP governed nematode diversity along the precipitation gradient of agroecosystem.●Soil pH determined nematode abundance and footprint in low precipitation *** plays a crucial role in global biodiversity change across terrestrial *** is proven to affect soil organism diversity in natural ***,how precipitation change affects the function of the soil nematode community remains unclear in cropland ***,we tested soil nematode communities from different precipitation sites(300 mm to 900 mm)of the agricultural *** abundance of total nematodes,fungivores,and plant parasites,together with the footprint of fungivores was significantly affected by mean annual precipitation(MAP)in cropland *** parasites diversity and footprint showed negative relationships with *** random forest suggested plant parasite footprint was the most responsive to *** structural equation model revealed that MAP affected nematode abundance and footprint indirectly via soil pH;nematode diversity was affected by MAP *** conclude that precipitation could act as the main selection stress for nematode diversity among the large gradient of agricultural ***,the soil pH may act as a stress factor in determining nematode community and carbon flow in the soil food *** study emphasized that using nematode value by trophic group would provide a deep understanding of nematode response to precipitation in cropland ecosystems.

关键词： soil nematode community nematode carbon flux the Northeast China Transect agricultural ecosystem precipitation

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Numerical Simulation-Based Analysis of the Impact of Overloading on Segmentally Assembled Bridges

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Structural Durability & Health Monitoring 2024年第5期18卷 663-681页

作者： donghui Ma Wenqi wu Yuan Li Lun Zhao Yingchun Cai Pan Guo Shaolin Yang Shanghai Urban Construction and Maintenance Management Co. Ltd.Shanghai200023China School of Water Conservancy and Transportation Zhengzhou UniversityZhengzhou450001China

Segmentally assembled bridges are increasinglyﬁnding engineering applications in recent years due to their unique advantages,especially as urban *** loads are one of the most important variable loads acting on bridge ***,the inﬂuence of overloaded vehicles on existing assembled bridge structures is an urgent concern at *** paper establishes theﬁnite element model of the segmentally assembled bridge based on ABAQUS software and analyzes the inﬂuence of vehicle overload on an assembled girder bridge ***,aﬁnite element model corresponding to the target bridge is established based on ABAQUS software,and the load is controlled to simulate vehicle movement in each area of the traveling zone at different ***-ond,the key cross-sections of segmental girder bridges are monitored in real time based on the force character-istics of continuous girder bridges,and they are compared with the simulation ***,a material damage ontology model is introduced,and the structural damage caused by different overloading rates is compared and *** show that theﬁnite element modeling method is accurate by comparing with on-site measured data,and it is suitable for the numerical simulation of segmental girder bridges;Dynamic sensors installed at 1/4L,1/2L,and 3/4L of the segmental girder main beams could be used to identify the dynamic response of segmental girder bridges;The bottom plate of the segmental girder bridge is mostly damaged at the position where the length of the precast beam section changes and the midspan *** the increase in load,damage in the direction of the bridge develops faster than that in the direction of the transverse ***ﬁndings of this study can guide maintenance departments in the management and maintenance of bridges and vehicles.

关键词： Segmentally assembled bridge dynamic response moving loads overloading structural damage ﬁnite element analysis

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Effect of Transgenic Corn Cultivation and Sampling Location on Feeding Habits of Collembola

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Journal of Agricultural Science and Technology(A) 2014年第3期4卷 235-242页

作者： Baifeng Wang Liang Chang donghui wu Xinyuan Song Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130102 China Agro-biotechnology Research Institute Jilin Academy of Agriculture Sciences Changchun 130033 China University of Chinese Academy of Sciences Beijing 100049 China

Transgenic corn was modified to combat lepidopteran pests, herbicide and other deteriorate environmental factors. However, fewer studies concerned the effects of transgenic corn cultivation on the soil Collembola in black soil region in China. In Jilin black soil region, a six treatments study including three corn varieties （transgenic corn, control and local variety） and two sampling locations （in rizhosphere and in between plants） were deployed to study the effect of transgenic corn cultivation and sampling location on densities, species richness and community structure of Collembola. We found that root biomass was marginally decreased in transgenic corn and control variety when compared to local variety. Collembola significantly affected by sampling location treatments. Densities and species richness of collembolans significantly decreased in ＂between plants＂ than in ＂rizhosphere＂. Densities of Collembola were impacted by corn varieties. In the whole growing season, densities of Collembola significantly decreased in control than in local variety. Collembolans in transgenic variety only slightly decreased in ＂jointing stage＂ than local variety. Collembolans adversely affected in ＂between plants＂ when compared to ＂in rhizosphere＂ in ＂seeding stage＂ but not other stages. These variations of collembolans were in lines with the trend of corn root biomass. It is indicated that Collembola variations could be caused by food resources （root biomass） but not corn varieties （transgenic, control and local）.

关键词： Community structure transgenic corn feeding habits Collembola CCA analysis.

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Enhanced activation of peroxymonosulfate by Fe/N co-doped ordered mesoporous carbon with dual active sites for efficient removal of m-cresol

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Chinese Journal of Chemical Engineering 2024年第1期65卷 130-144页

作者： donghui Li Wenzhe wu Xue Ren Xixi Zhao Hongbing Song Meng Xiao Quanhong Zhu Hengjun Gai Tingting Huang College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China School of Chemical&Environmental Engineering China University of Mining&Technology-BeijingBeijing 100083China

The novel Fe-N co-doped ordered mesoporous carbon with high catalytic activity in m-cresol removal was prepared by urea-assisted impregnation and simple pyrolysis *** the preparation of the Fe-NC catalyst,the complexation of N elements in urea could anchor Fe,and the formation of C3N4during urea pyrolysis could also prevent migration and aggregation of Fe species,which jointly improve the dispersion and stability of *** FeN4sites and highly dispersed Fe nanoparticles synergistically trigger the dual-site peroxymonosulfate (PMS) activation for highly efficient m-cresol degradation,while the ordered mesoporous structure of the catalyst could improve the mass transfer rate of the catalytic process,which together promote catalytic degradation of m-cresol by PMS *** oxygen species (ROS) analytic experiments demonstrate that the system degrades m-cresol by free radical pathway mainly based on SO_(4)^(-)·and·OH,and partially based on·OH as the active components,and a possible PMS activation mechanism by 5Fe-50 for m-cresol degradation was *** study can provide theoretical guidance for the preparation of efficient and stable catalysts for the degradation of organic pollutants by activated PMS.

关键词： Degradation Peroxymonosulfate Fe(II)/Fe(III)/FeN4 Ordered mesopores carbon Catalyst Radical

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Ecological Effects of Remote Smallsand Descending on Urban Area:Deduced from the "Mud - Snow" in Changchun City

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Global Geology 2000年第2期5卷 230-235页

作者： wu donghui Hu Ke Wang Yun Yang Deming Zhao Wei Chen Shan Jilin University Changchun 130026 P. R. China College of Biological Sciences Northeast Normal University Changchun 130024 P. R. China

A serious sandstorm occurred in North China from April 5 to April 7, 2000, while the remote smallsand decending took place in even larger area to the far northeast China. In Chanchun city, smallsand descending with snow provides the best samples to conduct a quantitative research on the possible impacts of city - ecology. In the 253km2 urban district area of Changchun city, smallsands accumulated up to more than 3000t on April 7, according to the calculation of four "mud - snow" samples. After naturally melting in room temperature, two samples are taken to do quarantine of "invasion bacteria". As a preliminary result, the individual amount of bacterium in 1 ml sample water is up to 8. 9 x 104 or 1. 05 x 105, and it is estimated that there are 640 million "invasion bacterium" individuals in one square meter. This study proves that other than the obvious environmental effects of sandstorm, the urban micro - ecosystem is very possible under threat by the "invasion bacterium" accompanied by remote descending smallsand.

关键词： Remote smallsand Bacteria - total Ecological security Changchun city

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Intratumoral CD103^(+)CD8^(+)T cells predict response to neoadjuvant chemoimmunotherapy in advanced head and neck squamous cell carcinoma

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Cancer Communications 2023年第10期43卷 1143-1163页

作者： Siqi Ren Tianjun Lan Fan wu Suling Chen Xue Jiang Chuying Huo Zitian Li Shule Xie donghui wu Ruixin Wang Yanyan Li Lin Qiu Guoxin Huang Shurui Li Xiaojuan Wang Meifeng Cen Tingting Cai Zhaoyu Lin Jinsong Li Bowen Li Department of Oral and Maxillofacial Surgery Sun Yat-sen Memorial Hospital of Sun Yat-sen UniversityGuangdongP.R.China Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation Guangdong-Hong Kong Joint Laboratory for RNA MedicineMedical Research CenterSun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangdongP.R.China Department of Gynecological Oncology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangdongP.R.China School of Stomatology Jilin UniversityJilinP.R.China Stomatology Hospital of Haizhu district GuangdongP.R.China

Background Immune cell heterogenicity is known to determine the therapeutic response to cancer *** chemoimmunotherapy(NACI)has shown clinical benefits in some patients with advanced head and neck squamous cell carcinoma(HNSCC),but the underlying mechanism behind this clinical response is *** efficacy of NACI needs to be potentiated by identifying accurate biomarkers to predict clinical ***,we attempted to identify molecules predicting NACI response in advanced *** We performed combined single-cell RNA sequencing(scRNA-seq)and multiplex immunofluorescence(mIHC)staining with tumor samples derived from NACI-treated HNSCC patients to identify a new tumor-infiltrating cell(TIL)subtype,CD103^(+)CD8^(+)TILs,associated with clinical response,while both in vitro and in vivo assays were carried out to determine its antitumor *** regulatory mechanism of the CD103^(+)CD8^(+)TILs population was examined by performing cell-cell interaction analysis of the scRNA-seq data and spatial analysis of the mIHC *** We established intratumoral CD103^(+)CD8^(+)TILs density as a determinant of NACI efficacy in *** scRNA-seq results indicated that the population of CD103^(+)CD8^(+)TILs was dramatically increased in the responders of NACI-treated HNSCC patients,while mIHC analysis confirmed the correlation between intratumoral CD103^(+)CD8^(+)TILs density and NACI efficacy in HNSCC *** receiver operating characteristic curve analysis defined this TIL subset as a potent marker to predict patient response to *** assays showed that CD103^(+)CD8^(+)TILs were tumor-reactive T cells,while programmed cell death protein-1(PD-1)blockade enhanced CD103^(+)CD8^(+)TILs cytotoxicity against tumor growth in ***,targeting the triggering receptor expressed on myeloid cells 2-positive(TREM2^(+))macrophages might enhance the population of CD103^(+)CD8^(+)TILs and facilitate antitumor immunity

关键词： CD103 CD8 head and neck squamous cell carcinoma neoadjuvant chemoimmunotherapy predictive marker tumor-infiltrating lymphocyte

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Accounting Conservatism in Chinese Listed Firms: The Influence of Standards,Incentives,and Monitoring

Accounting Conservatism in Chinese Listed Firms: The Influen...

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中国会计学会2007年学术年会

作者： donghui wu (School of Accounting and Finance The Hong Kong Polytechnic University)

This study examines the interplay of accounting standards,reporting incentives,and monitoring mechanisms in the determination of conservatism among listed firms in *** find that more conservative accounting standards do result in more timely recognition of economic losses,an important characteristic of conservative financial *** contrast,we do not find any evidence of conservatism in years when accounting rules do not allow firms to be *** suggests that conservative accounting rules are a necessary ingredient in conservative financial ***,we also show that accounting standards are not *** firms without proper incentives,the recognition of economic losses is still not timely even if conservative rules are ***,we report that monitoring by other large shareholders,debt-holders,or large auditors mitigates weak incentives in conservative financial *** together,our findings suggest that standards,incentives,and monitoring mechanisms are all necessary ingredients in fostering accounting *** study contributes to our understanding of accounting conservatism by providing evidence on inter-relationships among accounting standards,reporting incentives,and external monitoring.

关键词： Conservatism Accounting standards Incentives Monitoring China

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基于相似理论和模型试验的K418B大型薄壁件的成形及品质

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特种铸造及有色合金 2022年第3期42卷 384-390页

作者：丁雪吴东辉航天海鹰(哈尔滨)钛业有限公司哈尔滨150029 哈尔滨工业大学金属精密热加工国家级重点实验室哈尔滨150029

为实现利用比例模型来预测高温合金大型薄壁件的成形过程及内部品质的目的,采用物理相似的方法设计了比例模型并验证了其有效性。采用数值模拟和熔模铸造试验研究了高温合金大型薄壁件的流动性、凝固过程和内部品质。结果表明,比例模型... 详细信息

为实现利用比例模型来预测高温合金大型薄壁件的成形过程及内部品质的目的,采用物理相似的方法设计了比例模型并验证了其有效性。采用数值模拟和熔模铸造试验研究了高温合金大型薄壁件的流动性、凝固过程和内部品质。结果表明,比例模型可以充分反映原高温合金大型薄壁件的成形过程及内部品质,高温合金大型薄壁构件中筋条和无缝隙浇道连接的光滑薄壁处的充填凝固特性相同,且充填凝固速度均大于凸台的充填凝固速度,但充填凝固趋势相同。这表明相似理论与数值模拟及实际试验相结合可有效指导高温合金大型薄壁铸件的熔模铸造生产,有效降低其研制成本、提高成品率。

关键词：镍基高温合金熔模铸造物理相似数值模拟大型薄壁件

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