检索结果-南通市图书馆

Comparative transcriptomic analysis of ovary and testis reveals sex-related genes in roughskin sculpin Trachidermus fasciatus

引用

Journal of Oceanology and Limnology 2024年第5期42卷 1673-1682页

作者： Dongxiu XUE Sudong XIA tengfei XING Yuqian GAO Jinxian LIU CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Qingdao Marine Science and Technology CenterQingdao 266200China Tianjin Key Lab of Aqua-Ecology and Aquaculture Department of Fishery ScienceTianjin 300380China

The mechanisms underlying sex determination and differentiation have long intrigued researchers in the fields of development and evolutionary *** roughskin sculpin(Trachidermus fasciatus Heckel),displaying sexual dimorphism,provides an ideal model for studying the ***,both genetic and genomic information concerning sex determination and differentiation,such as gonadal transcriptome data in roughskin sculpin,are ***,we present the first gonadal transcriptomes of roughskin sculpin and identify sex-related *** identified 8531 differentially expressed genes(DEGs),among them 4065 were upregulated in the ovary and 4466 upregulated in the *** sex-related gene ontology(GO)terms were enriched in ovary-biased genes,including“binding of sperm to zona pellucida”,“egg coat formation”,“positive regulation of acrosome reaction”,“cell division”,and“cell cycle”,while the GO terms such as“spermatogenesis”,“sperm axoneme assembly”,“cilium assembly”,“cilium movement”,and“cilium movement involved in cell motility”were enriched in testis-biased ***,six KEGG pathways were significantly enriched in the ovary,whereas only one was enriched in the *** these DEGs,40 sex-related genes were identified,which including 26 testis-biased genes(such as Dmrtb 1,Gsdf,Sox 9 b,Wnt 4 b,Tcp 11 l 2,and Efhb),and 14 ovary-biased genes(such as Cyp 19 a 1 a,Foxh 1,Foxr 1,Gdf 3,Hsd 17 b 12,and Igf 2 bp 3).This gonadal transcript dataset would broaden our understanding of sex determination and differentiation mechanisms in roughskin sculpin,expand the genomic database,support future studies on sex-related gene functions,and facilitate molecular biology research into roughskin sculpin.

关键词： Trachidermus fasciatus transcriptome ovary testis sex-related gene

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evolution History of Mesas in the Southern Utopia Planitia and Implications for the Ancient Oceans on Mars

引用

Journal of Earth Science 2023年第3期34卷 940-950页

作者： tengfei Zhang Le Wang Arzigul Saidamat Long Xiao Jun Huang State Key Laboratory of Geological Processes and Mineral Resources Planetary Science InstituteSchool of Earth SciencesChina University of GeosciencesWuhan 430074China Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefei 230026China

As one of the prominent landforms in the Zhurong landing region,mesas are geological features with flat tops and steep marginal *** mesas are widely distributed along the dichotomy *** are various interpreted origins proposed for the mesas,such as the erosion of sedimentary layers,tuyas eruptions,or surface collapse due to the catastrophic release of *** investigate the detailed morphological characteristics of the mesas on the Late Hesperian Lowland unit within the Utopia *** observe morphological evidence for both the ice-bearing interior mesas and the sedimentary origin,including(1)small pits on the crater wall and mesa cliff formed by the release of volatiles like ice;(2)lobate flows at the base of mesas formed by the melting of subsurface ice;(3)layered mesas indicating sedimentary origin;(4)grooves on the top surface of mesas formed by the volumetric compaction of sedimentary *** results indicate that the mesas in the study area are formed by the erosion of sedimentary layers and representative of the Noachian oceanic *** propose an evolutionary model for the *** study will provide some insights into future research of ancient ocean hypothesis of Mars and interesting targets for the exploration of the Zhurong rover.

关键词： mesas ancient oceans Tianwen-1 Utopia Planitia Mars planetary surface analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mining KPI correlations for non-parametric anomaly diagnosis in wireless networks

引用

Science China(Information Sciences) 2023年第6期66卷 155-169页

作者： tengfei SUI Xiaofeng TAO Huici WU Xuefei ZHANG Jin XU Guoshun NAN National Engineering Laboratory for Mobile Network Technologies Beijing University of Posts and Telecommunications

The increase in mobile data traffic has imposed unprecedented pressure on wireless network management. KPI-based anomaly diagnosis can alleviate such pressure by automatically identifying the cause of abnormalities in the traffic and providing end-to-end monitoring and optimization. Previous approaches mainly focus on finding a subset of anomaly-inducing KPIs on the basis of supervised learning *** studies have two possible limitations:(1)the inherent correlations between KPIs that are proven to be effective for the anomaly diagnosis, are still largely underexplored;(2)machine learning models heavily rely on human annotations, which are expensive and labor-intensive. Therefore, we propose random matrix theorybased KPI identification(RKI), a novel method that automatically mines rich interactions between KPIs for anomaly diagnosis without using any learnable parameters or human annotations. Specifically, RKI diagnoses the abnormal KPIs in two steps. First, we build a matrix for anomaly KPI detection to mine the spectrum of its covariances. Second, another new matrix is reconstructed to calculate the correlation difference. By doing so, the anomaly KPIs that have larger correlation difference scores can be efficiently identified in the wireless traffic without any trainable parameters. In extensive experiments on a public dataset, RKI yields a 6.5%higher true diagnostic rate and 11.36% lower false alarming rate than the statistical model, demonstrating its effectiveness. A 100× larger scale synthetic dataset also demonstrates the capabilities of RKI to explore massive data traffic under real-word scenarios. Finally, we discuss RKI’s potential applications of our method in future 6G wireless networks.

关键词： random matrix theory spectral distribution anomaly diagnosis data analysis wireless networks

来源：

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Objective array design for three-dimensional temperature and salinity observation:Application to the South China Sea

引用

Acta Oceanologica Sinica 2022年第7期41卷 65-77页

作者： Mengxue Qu Zexun Wei Yanfeng Wang Yonggang Wang tengfei Xu First Institute of Oceanography and Key Laboratory of Marine Science and Numerical ModelingMinistry of Natural ResourcesQingdao266061China Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237China Shandong Key Laboratory of Marine Science and Numerical Modeling Qingdao266061China

In this study,a moored array optimization tool(MAOT)was developed and applied to the South China Sea(SCS)with a focus on three-dimensional temperature and salinity *** of the MAOT involves two steps:(1)deriving a set of optimal arrays that are independent of each other for different variables at different depths based on an empirical orthogonal function method,and(2)consolidating these arrays using a K-center clustering *** with the assumed initial array consisting of 17 mooring sites located on a 3°×3°horizontal grid,the consolidated array improved the observing ability for three-dimensional temperature and salinity in the SCS with optimization efficiencies of 19.03%and 21.38%,*** with an increased number of moored sites showed that the most cost-effective option is a total of 20 moorings,improving the observing ability with optimization efficiencies up to 26.54%for temperature and 27.25%for *** design of an objective array relies on the ocean phenomenon of interest and its spatial and temporal *** this study,we focus on basin-scale variations in temperature and salinity in the SCS,and thus our consolidated array may not well resolve mesoscale *** MAOT can be extended to include other variables and multi-scale variability and can be applied to other regions.

关键词： optimal array design observation system simulation experiment South China Sea empirical orthogonal function K-center clustering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Parameter sensitivity analysis for a biochemically-based photosynthesis model

引用

Research in Cold and Arid Regions 2023年第2期15卷 73-84页

作者： Tuo Han Qi Feng tengfei Yu Key Laboratory of Eco-Hydrology of Inland River Basin Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)LanzhouGansu 730000China

A challenge for the development of Land Surface Models(LSMs) is improving transpiration of water exchange and photosynthesis of carbon exchange between terrestrial plants and the atmosphere, both of which are governed by stoma in leaves. In the photosynthesis module of these LSMs, variations of parameters arising from diversity in plant functional types(PFTs) and climate remain unclear. Identifying sensitive parameters among all photosynthetic parameters before parameter estimation can not only reduce operation cost, but also improve the usability of photosynthesis models worldwide. Here, we analyzed 13 parameters of a biochemically-based photosynthesis model(FvCB), implemented in many LSMs, using two sensitivity analysis(SA) methods(i.e., the Sobol’ method and the Morris method) for setting up the parameter ensemble. Three different model performance metrics, i.e.,Root Mean Squared Error(RMSE), Nash Sutcliffe efficiency(NSE), and Standard Deviation(STDEV) were introduced for model assessment and sensitive parameters identification. The results showed that among all photosynthetic parameters only a small portion of parameters were sensitive, and the sensitive parameters were different across plant functional types: maximum rate of Rubisco activity(Vcmax25), maximum electron transport rate(Jmax25), triose phosphate use rate(TPU) and dark respiration in light(Rd) were sensitive in broad leafevergreen trees(BET), broad leaf-deciduous trees(BDT) and needle leaf-evergreen trees(NET), while only Vcmax25and TPU are sensitive in short vegetation(SV), dwarf trees and shrubs(DTS), and agriculture and grassland(AG). The two sensitivity analysis methods suggested a strong SA coherence;in contrast, different model performance metrics led to different SA results. This misfit suggests that more accurate values of sensitive parameters, specifically, species specific and seasonal variable parameters, are required to improve the performance of the FvCB model.

关键词： Sobol’method Morris method Photosynthesis Parameters sensitivity analysis FvCB model

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Graph Neural Architecture Search:A Survey

引用

Tsinghua Science and Technology 2022年第4期27卷 692-708页

作者： Babatounde Moctard Oloulade Jianliang Gao Jiamin Chen tengfei Lyu Raeed Al-Sabri School of Computer Science and Engineering Central South UniversityChangsha 410083China

In academia and industries,graph neural networks(GNNs)have emerged as a powerful approach to graph data processing ranging from node classification and link prediction tasks to graph clustering *** models are usually ***,building handcrafted GNN models is difficult and requires expert experience because GNN model components are complex and sensitive to *** complexity of GNN model components has brought significant challenges to the existing efficiencies of ***,many studies have focused on building automated machine learning frameworks to search for the best GNN models for targeted *** this work,we provide a comprehensive review of automatic GNN model building frameworks to summarize the status of the field to facilitate future *** categorize the components of automatic GNN model building frameworks into three dimensions according to the challenges of building *** reviewing the representative works for each dimension,we discuss promising future research directions in this rapidly growing field.

关键词： graph neural network neural architecture search automated machine learning geometric deep learning

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Large-scale laboratory study on the evolution lawof temperature fields in the context of underground coal gasification

引用

Chinese Journal of Chemical Engineering 2020年第12期28卷 3126-3135页

作者： Zhe Wang Yongchao Wei tengfei Hou Yongchuan Jin Cuilan Wang Jie Liang School of Chemical and Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology(Beijing)Beijing 100083China Hebei Provincial Coalfield Geology Bureau Geophysical Prospecting&Survey Administration Xingtai 054000China

This article presents the evolution law of temperature fields in a large-scale laboratory Underground Coal Gasification reactions using Ulanqab lignite under actual *** results show that in the cultivation stage of oxidation zone,the main direction of the temperature field expansion is consistent with the crack direction of the coal *** the gasification stabilization stage,the main direction of the temperature field expansion is along the *** temperature of the coal seam and the overlying rock mass at its interface with the furnace directly above the gasification channel is equivalent to that of the coal seam temperature,and this temperature is much greater than the temperatures observed near both side walls of the gasification channel at the ***,temperatures perpendicular to the axis of the gasification channel are similar at a vertical distance of 40 cm away from the *** temperature distributions indicate that the transmission of heat through the overlying rock mass is more rapid in the vertical direction than in the horizontal ***,some degree of thermal dispersion is observed in the vertical direction near the *** thermal dispersion coefficient is 0.72 and dispersion angle γ is 78.7°.

关键词： Underground coal gasification Temperature distribution Coal seam crack Gasification channel Overlying strata

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Self-assembled Supramolecular Artificial Transmembrane Ion Channels:Recent Progress and Application

引用

Chemical Research in Chinese Universities 2023年第1期39卷 3-12页

作者： LUO Yichen ZHU Canhong ZHANG Tianlong YAN tengfei LIU Junqiu College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationKey Laboratory of Organosilicon Material TechnologyHangzhou Normal UniversityHangzhou311121P.R.China

Natural protein channels have evolved with fantastic spatial structures,which play pivotal physiological functions in all living *** from nature,chemical scientists have developed a myriad of artificial transmembrane ion channels by using various chemical strategies,among which the non-covalent supramolecular ion channels exhibit remarkable advantages over other forms(e.g.,single-molecule ion channel),which exhibited facile preparation methods,easier structural modification and *** this review,we have systematically summarized the recent progress of supramolecular self-assembled artificial transmembrane ion channels,which were classified by different self-assembly mechanisms,such as hydrogen bonds,π-πinteractions,*** preparation process and self-assembly strategies of the supramolecular ion channels have been ***,potential biomedical applications of the supramolecular ion channels have also been carefully discussed in this ***,future opportunities and challenges facing this field were also elaborately *** is anticipated that this review could provide a panoramic sketch and future directions towards the construction of novel artificial ion channels with novel functions and biomedical applications.

关键词： Self-assembly Supramolecular Artificial ion channel Biomedical application

来源：

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

Influence of Nitrogen Flow Ratio on the Microstructure, Composition, and Mechanical Properties of DC Magnetron Sputtered Zr-B-O-N Films

引用

Journal of Materials Science & Technology 2012年第11期28卷 981-991页

作者： Tie-Gang Wang Yanmei Liu tengfei Zhang Doo-In Kim KwanKHo Kim

Nanocrystalline ZrB2 film and nanocomposite Zr-B-O-N films were prepared by non-reactive as well as re- active magnetron sputtering techniques, respectively. By means of X-ray diffraction analysis, electron probe microanalysis, X-ray photoelectron spectroscopy, and scanning electron microscopy, the influence of nitrogen flow ratio on the film microstructure and characteristics were investigated systematically, including the depo- sition rate, chemical compositions, phase constituents, grain size, chemical bonding, as well as cross-sectional morphologies. Meanwhile, the hardness and adhesion of above films were also evaluated by micro-indentation method and a scratch tester. With increasing the nitrogen flow ratio, the deposition rate of above films de- creased approximately linearly, whereas the contents of N and O in the films increased gradually and tended to saturation. Moreover, the film microstructure was also altered gradually from a fine columnar microstructure to a featureless glass-structure. As the nitrogen flow ratio was 11.7%, the Zr-B-O-N film possessed an typical nanocomposite structure and presented good mechanical properties. During the process of reactive sputtering of metal borides, the introduction of nitrogen can show a pronounced suppression of columnar grain growth and strong nanocomposite structure forming ability.

关键词： Films DC magnetron sputtering Nanocomposite Microhardness Adhesion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A combined experimental and DEM investigation of grain interlocking in sheared granular assemblies

引用

Particuology 2024年第7期90卷 436-451页

作者： Rui Lu Qiang Luo tengfei Wang David P.Connolly Tao Xie School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of High-Speed Railway Engineering(Southwest Jiaotong University) Ministry of EducationChengdu 610031China School of Civil Engineering University of LeedsLeeds LS29JTUK Department of Civil Engineering McMaster UniversityHamiltonONCanada

Compacted granular material,integral to geotechnical engineering,undergoes translation,rotation,and interlocking when subject to shear displacements or external *** present study focuses on the interlocking of heterogeneous granular materials,a complex behavior influenced by gradation,compaction,and varying particle geometry,and has consequently received limited attention in existing *** address this research gap,we conducted an analysis on the effect of grain interlocking on the shear resistance of granular assemblies,using a combination of laboratory testing and the discrete element method(DEM).Initially,large-scale direct shear tests were conducted on gravel−sand mixes with varying degrees of compaction and normal *** of the mixes also underwent subsequent shear reversal to explore the differences in grain interlocking between the two shearing processes on the shear *** analyzing the laboratory results,a mesoscopic scale investigation was performed by replicating the test using discrete element *** facilitate this,granular particle geometries were measured using 3D laser scanning based on the physical lab ***,based on these scans,discrete element R-block and ball models were utilized to construct both the coarse and fine particles within the *** vibro-compaction was employed to regulate the degree of *** results indicate that an increase in vertical pressure,coupled with a zero dilatancy angle,results in a rising stress ratio,indicative of grain *** interlocking exhibits a positive correlation with both the coarse content and the degree of compaction,and varies depending on the shear *** interlocking progresses,the shear band,induced by particle movement,expands and is associated with reduced particle rotation near the shear *** study further reveals a consistent positive correlation between interlocking and the principal orientation angle of strong normal c

关键词： Granular material Interlocking Shear resistance Direct shear Discrete element method Vibro-compaction

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：