检索结果-南通市图书馆

维普期刊数据库博看期刊

Heterotrophy-coordinated diazotrophy is associated with significant changes of rare taxa in soil microbiome

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2022年第3期32卷 402-413页

作者： Wei gao Lianfeng WANG Zhongjun jia State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008(China) University of Chinese Academy of Sciences Beijing 100049(China) College of Environmental and Chemical Engineering Dalian Jiaotong UniversityDalian 116028(China)

Soil heterotrophic respiration during decomposition of carbon(C)-rich organic matter plays a vital role in sustaining soil ***,it remains poorly understood whether dinitrogen(N_(2))fixation occurs in support of soil heterotrophic *** this study,^(15)N_(2)-tracing indicated that strong N_(2)fixation occurred during heterotrophic respiration of carbon-rich *** organic ^(15)N increased from 0.37 atom%to 2.50 atom%under aerobic conditions and to 4.23 atom%under anaerobic conditions,while the concomitant CO_(2)flux increased by 12.0-fold under aerobic conditions and 5.18-fold under anaerobic *** N_(2)fixation was completely absent in soils replete with inorganic N,although soil N bioavailability did not alter soil ***-throughput sequencing of the 16S rRNA gene further indicated that:i)under aerobic conditions,only 15.2%of soil microbiome responded positively to glucose addition,and these responses were significantly associated with soil respiration and N_(2)fixation and ii)under anaerobic conditions,the percentage of responses was even lower at 5.70%.Intriguingly,more than 95%of these responses were originally rare with<0.5%relative abundance in background soils,including typical N_(2)-fixing heterotrophs such as Azotobacter and Clostridium and well-recognized non-N_(2)-fixing heterotrophs such as Sporosarcina,Agromyces,and *** results suggest that only a small portion of the soil microbiome could respond quickly to the amendment of readily accessible organic C in a fluvo-aquic soil and highlighted that rare phylotypes might have played more important roles than previously appreciated in catalyzing soil C and nitrogen *** study indicates that N_(2)fixation could be closely associated with microbial turnover of soil organic C when available in excess.

关键词： rare phylotypes diazotrophs heterotrophic respiration N_(2)fixation ^(15)N_(2)-tracing

Stock Efficiency Evaluation Based on Multiple Risk Measures:A DEA-Like Envelopment Approach

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2022年第4期35卷 1480-1499页

作者： LI Jun gao Hengxuan LI Yongjun JIN Xi liang liang School of Management University of Science and Technology of ChinaHefei230026China School of Management Hefei University of TechnologyHefei230009China

This paper proposes a new approach for stock efficiency evaluation based on multiple risk measures. A derived programming model with quadratic constraints is developed based on the envelopment form of data envelopment analysis(DEA). The derived model serves as an input-oriented DEA model by minimizing inputs such as multiple risk measures. In addition, the Russell input measure is introduced and the corresponding efficiency results are evaluated. The findings show that stock efficiency evaluation under the new framework is also effective. The efficiency values indicate that the portfolio frontier under the new framework is more externally enveloped than the DEA efficient surface under the standard DEA framework.

关键词： Data envelopment analysis(DEA) multiple risk measures portfolio selection stock efficiency evaluation

Microglia in depression:current perspectives

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2021年第6期64卷 911-925页

作者： Xiaoning jia Zhihua gao Hailan Hu Department of Psychiatry of First Affiliated Hospital Zhejiang University School of MedicineHangzhou 310003China The MOE Frontier Science Center for Brain Research and Brain-Machine Integration Zhejiang University School of Brain Science and Brain MedicineHangzhou 310012China NHC and CAMS Key Laboratory of Medical Neurobiology Mental Health CenterZhejiang UniversityHangzhou 310058China Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence Guangzhou 510515China Fountain-Valley Institute for Life Sciences Guangzhou 510530China Research Units of Brain Mechanisms Underlying Emotion and Emotion disorders Chinese Academy of Medical SciencesBeijing 100730China Department of Neurobiology and Department of Neurology of Second Affiliated Hospital Zhejiang University School of MedicineHangzhou 310009China

Major depressive disorder(MDD)is a prevalent psychiatric disease that involves malfunctions of different cell types in the *** studies started to reveal that microglia,the primary resident immune cells,play an important role in the development and progression of *** respond to stress-triggered neuroinflammation,and through the release of proinflammatory cytokines and their metabolic products,microglia may modulate the function of neurons and astrocytes to regulate *** this review,we focused on the role of microglia in the etiology of *** discussed the dynamic states of microglia;the correlative and causal evidence of microglial abnormalities in depression;possible mechanisms of how microglia sense depression-related stress and modulate depression state;and how antidepressive therapies affect *** the role of microglia in depression may shed light on developing new treatment strategies to fight against this devastating mental illness.

关键词： depression microglia microglial activation pro-inflammatory cytokine anti-inflammatory cytokine antidepressant ketamine

Oil Pocket's Bearing Capacity Analysis of Liquid Hydrostatic Worktable in Gantry Moving Milling Center

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2014年第5期27卷 1008-1017页

作者： ZHAO jianhua liang Yingna gao Dianrong Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Liren College Yanshan University

Durning the design process of hydrostatic rotary worktable,the processing and assembly tolerance,（the offset of worktable and the gap of the oil film’s thickness）is *** it will cause that the real bearing of oil pocket deviates from the initial design value,and then the performance of rotary worktable will be reduced *** to now,no effort is found toward the research of influence of the processing and assembly tolerance on the performance of the rotary *** the hydrostatic oil film is assumed as the elastomer in this paper,and then the bearing capacity of the oil pocket is studied with and without the mass offset of the worktable by taking an expression between the bearing capacity and the oil film’s thickness of the oil pocket as the deform compatibility *** influence of the processing tolerance of the oil sealing belt’s gap on the bearing capacity of the oil pocket is *** the light of the liquid hydrostatic worktable of Gantry Moving Milling Center using on the scene,the oil pocket’s pressure of the worktable is tested using Rotary Worktable Test System under the circumstance of the mass offset of the worktable and the gap tolerance of the oil sealing belt,and then the equivalent offset of worktable,the average pressure of the oil pocket and the actual thickness of the oil film are analyzed *** test results show that the bearing capacity component of the oil pocket caused by G is consistent,and the component caused by M is relative to the position of the oil *** the oil sealing belt’s gap is larger than the theoretical value,the bearing capacity of the oil pocket is smaller than the others;whereas the bearing capacity of the oil pocket is larger than the *** maximum and minimum equivalent offsets are 0.256 4 mm and 0.047 5 mm,respectively,and the average oil pocket pressure varies from 0.345 MPa to 0.460 MPa,the maximum and minimum value of the actual oil film thickness are 109.976？m（No.7 oil

关键词： Gantry Moving Milling Center bearing capacity processing and assembly tolerance mass offset

Boosting Unsupervised Monocular Depth Estimation with Auxiliary Semantic Information

在线全文

学校读者我要写书评

暂无评论

China Communications 2021年第6期18卷 228-243页

作者： Hui Ren Nan gao jia Li State Key Laboratory of Media Convergence and Communication、Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture and Tourism(Communication University of China)、Beijing Key Laboratory of Modern Entertainment Technology(Communication University of China)、School of Information and Communication EngineeringCommunication University of China.No.1Dingfuzhuang StreetChaoyang DistrictBeijing100024China

Learning-based multi-task models have been widely used in various scene understanding tasks,and complement each other,i.e.,they allow us to consider prior semantic information to better infer *** boost the unsupervised monocular depth estimation using semantic segmentation as an auxiliary *** address the lack of cross-domain datasets and catastrophic forgetting problems encountered in multi-task training,we utilize existing methodology to obtain redundant segmentation maps to build our cross-domain dataset,which not only provides a new way to conduct multi-task training,but also helps us to evaluate results compared with those of other *** addition,in order to comprehensively use the extracted features of the two tasks in the early perception stage,we use a strategy of sharing weights in the network to fuse cross-domain features,and introduce a novel multi-task loss function to further smooth the depth *** experiments on KITTI and Cityscapes datasets show that our method has achieved state-of-the-art performance in the depth estimation task,as well improved semantic segmentation.

关键词： unsupervised monocular depth estimation semantic segmentation multi-task model

Typhoon events recorded in coastal lagoon deposits,southeastern Hainan Island

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2017年第4期36卷 37-45页

作者： ZHOU liang gao Shu YANG Yang ZHAO Yangyang HAN Zhuochen LI gaocong jia Peihong YIN Yong ing 210093 China Ministry of Education Key Laboratory for Coast and Island Development Nanjing University Nanjing 210093 China

Coastal lagoon deposits provide evidence for the magnitude and frequency of past tropical cyclones prior to instrumental records and historical *** the present study,we attempt to analyze the sedimentary records containing typhoon information for the northern South China Sea *** this purpose,sediment cores were collected from two coastal lagoons in the southeastern Hainan Island,and were analyzed in laboratory to derive the data sets about grain size,organic and inorganic carbon contents,and deposition *** grain size and organic-inorganic carbon data were used to formulate the proxies of typhoon *** deposition rates,as calculated using the CRS 210 Pb method,are around 0.5 mm/a for both lagoons,on the basis of which an age model is *** the cores,sedimentary layers associated with 35 typhoon events have been *** such a basis,a 350 year history of local typhoon activities is reconstructed by incorporating the 210 Pb dating results,typhoon-induced sedimentation patterns and the historical documents.A comparison of the frequency of typhoon occurrence with the regional climate records indicates that the observed changes in tropical cyclone activity patterns,as revealed by the lagoon sedimentary records,may be related to El Ni？o,Pacific Decadal Oscillation（PDO）,North Atlantic Oscillation（NAO）,sunspot,and other potential climate drivers that affect the tropical cyclone *** study demonstrates that the sedimentary record of storms can be analyzed in combination with historical documents,to provide meaningful information on past storm activities and their long-term variability.

关键词： paleostorms typhoon-induced deposits grain size loss on ignition Hainan Island

Morphological comparison and gonadotropins cell localization of mature female turbot and mouse pituitary

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2023年第6期41卷 2418-2428页

作者： Yudong jia Yunhong gao Jinxing LIN Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China Shanghai Laboratory Animal Research Center Shanghai 201203China

Reproduction is subtlety regulated by the hypothalamic-pituitary-gonad(HPG)axis in *** gland is the center of the HPG axis,while pituitary gonadotropins follicle stimulating hormone(FSH)and luteinizing hormone(LH)were identified the key elements of the HPG axis in teleost and ***,cell lines,and gonadotropins cell localization of female turbot and mouse pituitary were determined at mature stage to illustrate the anatomical difference and cell characteristics in this *** show that turbot pituitary is chicken heart-shaped,dorsoventral,located on the ventral surface of the *** mouse pituitary is oval,located in the pituitary fossa of the sella turcica at the skull *** well-distinguished areas adenohypophysis(AH)and neurohypophysis(NH)in pituitary were identified in turbot and *** AH comprised the rostral pars distalis(RPD),proximal pars distalis(PPD),and pars intermedia(PI).NH was not pronounced and with finger-like protrusions into ***,mouse AH only comprised the pars distalis(PD)and *** distribution was *** main types of cells(acidophilic,basophilic,and chromophobic cells)were distributed in the mouse PD region,whereas appeared in the turbot PPD,RPD,and ***,the percentage of mouse chromophobic and basophilic cells was higher and lower than that of turbot,*** diameter of the aforementioned three cells in the mouse was significantly higher than ***β-and lhβ-immunoreactive signals were identified in turbot-distinct pituitary cells that primarily occupied the peripheral and central regions of ***,mouse fsh-and lh-immunoreactive cells were expressed in the same cells and present in the *** results demonstrate the significantly difference of pituitary morphology,cell lines and gonadotropins(fshβand lhβ)location in female turbot and *** differences help for fully understand the evolution and endocrinological functions of pituitary.

关键词： turbot mouse pituitary gland cell line gonadotropins

Classifying the sedimentary environments of the Xincun Lagoon,Hainan Island,by system cluster and principal component analyses

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2017年第4期36卷 64-71页

作者： YANG Yang gao Shu ZHOU liang WANG Yunwei LI gaocong WANG Yaping HAN Zhuochen jia Peihong State Key Laboratory for Estuarine and Coastal Research East China Normal University Ministry of Education Key Laboratory for Coast and Island Development Nanjing University College of Harbour Coastal and Offshore EngineeringHohai University

An understanding of the sedimentary environment in relation to its controlling factors is of great importance in coastal geomorphology,ecology,tourism and aquaculture *** attempt to deal with this issue,using a case study from the Xincun Lagoon,Hainan Island in southern *** the study,surficial sediment samples were collected,together with hydrodynamic and bathymetric surveys,during August *** simulation was carried out to obtain high-spatial resolution tidal current *** sediment samples were analyzed to derive mean grain size,sorting coefficient,skewness and kurtosis,together with the sand,silt and clay *** modern sedimentary environments were classified using system cluster and principal component *** size analysis reveals that the sediments are characterized by extremely slightly sandy silty mud（ESSSM） and slightly silty sand（SSS）,which are distributed in the central lagoon and near-shore shallow water areas,*** grain size varies from 0 to 8.0Ф,with an average of 4.6Ф.The silt content is the highest,i.e.,52% on average,with the average contents of sand and clay being 43% and 5%,*** exists a significant correlation between mean size and water depth,suggesting that the surficial sediments become finer with increasing water *** analyses reveals two groups of *** first group is characterized by mean grain size of more than 5.5Ф,whilst the second group has mean grain size of below 3.5Ф.Further,these groups also have different correlations between mean grain size and the other grain size *** terms of the tidal current,the average values of the root mean square velocity（RMSV） are 7.5 cm/s and 6.9 cm/s on springs and neaps,*** the RMSVs that are higher than 4 cm/s,a significant positive correlation is found between the content of the 63–125 μm fraction and the RMSV,suggesting that the RMSV determines the variability of the very fine sand *** on

关键词： surficial sediment grain size lagoon sedimentary environment statistical analysis numerical simulation Hainan Island

Meningeal lymphatic vessel crosstalk with central nervous system immune cells in aging and neurodegenerative diseases

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第3期20卷 763-778页

作者： Minghuang gao Xinyue Wang Shijie Su Weicheng Feng Yaona Lai Kongli Huang Dandan Cao Qi Wang Science and Technology Innovation Center Guangzhou University of Chinese MedicineGuangzhouGuangdong ProvinceChina Institute of Clinical Pharmacology Guangzhou University of Chinese MedicineGuangzhouGuangdong ProvinceChina The Sixth Affiliated Hospital Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Meningeal lymphatic vessels form a relationship between the nervous system and periphery, which is relevant in both health and disease. Meningeal lymphatic vessels not only play a key role in the drainage of brain metabolites but also contribute to antigen delivery and immune cell activation. The advent of novel genomic technologies has enabled rapid progress in the characterization of myeloid and lymphoid cells and their interactions with meningeal lymphatic vessels within the central nervous system. In this review, we provide an overview of the multifaceted roles of meningeal lymphatic vessels within the context of the central nervous system immune network, highlighting recent discoveries on the immunological niche provided by meningeal lymphatic vessels. Furthermore, we delve into the mechanisms of crosstalk between meningeal lymphatic vessels and immune cells in the central nervous system under both homeostatic conditions and neurodegenerative diseases, discussing how these interactions shape the pathological outcomes. Regulation of meningeal lymphatic vessel function and structure can influence lymphatic drainage, cerebrospinal fluid-borne immune modulators, and immune cell populations in aging and neurodegenerative disorders, thereby playing a key role in shaping meningeal and brain parenchyma immunity.

关键词： central nervous system meningeal lymphatic vessels immunity myeloid cells lymphatic cells neurodegenerative disease