检索结果-南通市图书馆

Hierarchical MPS-Based Three-Dimensional Geological Structure Reconstruction with Two-Dimensional Image(s)

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2021年第2期32卷 455-467页

作者： Weisheng Hou Hengguang Liu Tiancheng zheng Wenjie Shen Fan Xiao School of Earth Sciences and Engineering Sun Yat-Sen UniversityGuangzhou 510275China Guangdong Provincial Key Lab of Geodynamics and Geohazards Guangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory Zhuhai 519000China

Multiple-point statistics(MPS)is a useful approach to reconstruct three-dimensional models in the macroscopic or microscopic *** spatial features for three-dimensional reconstruction from two-dimensional training images(TIs),and characterizing non-stationary features with directional ductility are two key issues in MPS *** study presents a step-wise MPS-based three-dimensional structures reconstruction algorithm with the sequential process and hierarchical strategy based on two-dimensional *** extension method is proposed to construct three-dimensional *** a sequential simulation process,an initial guess at the coarsest scale is simulated,in which hierarchical strategy is used according to the characteristics of *** obtain a more refined realization,an expectation-maximization like iterative process with global optimization is implemented.A concrete example of chondrite micro-structure simulation,in which one scanning electron microscopy(SEM)image of the Heyetang meteorite is used as TI,shows that the presented algorithm can simulate complex non-stationary structures.

关键词： multiple-point statistics hierarchical strategy chondrite two-dimensional image(s)

Protocol Format Extraction Based on an Improved CFSM Algorithm

在线全文

学校读者我要写书评

暂无评论

China Communications 2020年第11期17卷 156-180页

作者： Peihong Lin zheng Hong Lifa Wu Yihao Li Zhenji Zhou Army Engineering University Nanjing 210000China Nanjing University of Posts and Telecommunications Nanjing 210000China

As the information technology rapidly develops,many network applications appear and their communication protocols are *** many protocol keyword recognition based protocol reverse engineering methods have been proposed,most of the keyword recognition algorithms are time *** paper firstly uses the traffic clustering method F-DBSCAN to cluster the unknown protocol *** an improved CFSM(Closed Frequent Sequence Mining)algorithm is used to mine closed frequent sequences from the messages and identify protocol ***,CFGM(Closed Frequent Group Mining)algorithm is proposed to explore the parallel,sequential and hierarchical relations between the protocol keywords and obtain accurate protocol message *** results show that the proposed protocol formats extraction method is better than Apriori algorithm and Sequence alignment algorithm in terms of time complexity and it can achieve high keyword recognition ***,based on the relations between the keywords,the method can obtain accurate protocol *** with the protocol formats obtained from the existing methods,our protocol format can better grasp the overall structure of target protocols and the results perform better in the application of protocol reverse engineering such as fuzzing test.

关键词： flow clustering CFSM algorithm closed frequent sequences keyword recognition CFGM algorithm keyword relations format categorization

The phytochemical components of walnuts and their application for geographical origin based on chemical markers

在线全文

学校读者我要写书评

暂无评论

Food Quality and Safety 2022年第4期6卷 562-570页

作者： Runhong Mo Yuewen zheng Zhanglin Ni Danyu Shen Yihua Liu Research Institute of Subtropical Forestry Chinese Academy of ForestryFuyang DistrictHangzhouChina

Place of origin has an important influence on walnut quality and commercial value,which results in the requirement of rapid geographical traceability ***,a method for geographical origin identification of walnuts on the basis of nutritional quality of walnuts from China was *** concentrations of 43 phytochemical components were analyzed in walnut samples from five different walnut-producing regions of *** on 14 chemical markers selected by the Random Forest method from these phytochemical components,a new discriminant model for geographical origin was built,with the corresponding correct classification rate of 99.3%.In addition,the quantitative quality differences of walnuts from five regions were analyzed,with values of 0.17–***,the top three chemical markers for the geographical origin discriminant analysis were Mo,V,and stearic acid,with contribution rates of 26.8%,18.9%,and 10.9%,*** study provides a potentially viable method for application in food authentication.

关键词： Walnut chemical marker geographical origin Random Forest method discriminant model

Parapatric speciation with recurrent gene flow of two sexual dichromatic pheasants

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

Avian Research 2022年第2期13卷 137-144页

作者： zheng Li Jie Zhou Minzhi Gao Wei Liang Lu Dong Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing100875China Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life SciencesHainan Normal UniversityHaikou571158China

Understanding speciation has long been a fundamental goal of evolutionary *** is widely accepted that speciation requires an interruption of gene flow to generate strong reproductive isolation between *** mechanism of how speciation in sexually dichromatic species operates in the face of gene flow remains an open *** species in the genus Chrysolophus,the Golden Pheasant(***)and Lady Amherst’s Pheasant(***),both of which exhibit significant plumage dichromatism,are currently parapatric in southwestern China with several hybrid recordings in *** this study,we estimated the pattern of gene flow during the speciation of the two pheasants using the Approximate Bayesian Computation(ABC)method based on data from multiple *** a newly assembled de novo genome of Lady Amherst’s Pheasant and resequencing of widely distributed individuals,we reconstructed the demographic history of the two pheasants by the PSMC(pairwise sequentially Markovian coalescent)*** results provide clear evidence that the gene flow between the two pheasants was consistent with the predictions of the isolation with migration model during divergence,indicating that there was long-term gene flow after the initial divergence(ca.2.2 million years ago).The data further support the occurrence of secondary contact between the parapatric populations since around 30 kya with recurrent gene flow to the present,a pattern that may have been induced by the population expansion of the Golden Pheasant in the late *** results of the study support the scenario of speciation between the Golden Pheasant and Lady Amherst’s Pheasant with cycles of mixing-isolation-mixing,possibly due to the dynamics of geographical context in the late *** two species provide a good research system as an evolutionary model for testing reinforcement selection in speciation.

关键词： Approximate Bayesian Computation Gene flow Golden Pheasant(Chrysolophus pictus) Lady Amherst’s Pheasant(Chrysolophus amherstiae) Pairwise Sequentially Markovian Coalescent Speciation

Potential anticancer activity analysis of piscidin 5-like from Larimichthys crocea

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2022年第3期41卷 53-60页

作者： Libing zheng Jiayin Qiu Huihui Liu Changfeng Chi Longshan Lin National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources School of Marine Science and TechnologyZhejiang Ocean UniversityZhoushan 316022China Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China

Antitumor activity is one characteristic function of some certain antimicrobial peptides(AMPs)found in recent *** the present study,we attempted to detect potential anticancer activity of a recombinant piscidin 5-like from Larimichthys crocea(r Lc-P5L)which owned widely antibacterial and strong antiparasitic activity in *** light microscope observation indicated r Lc-P5L was of antitumor activity to He La cells,293 T cells and L929 *** assay showed the toxic sensitivity of r Lc-P5L to three tumor cell strains was 293 T>L929>He *** electron microscope(SEM)results showed r Lc-P5L behaved like a lytic peptide to cause damage on cells membrane of L929 cells by forming globular clusters,even pores at 60μmol/L,or degrading membrane to make it completely lose cytoskeleton structure at 80μmol/L;r Lc-P5L treatment also resulted in DNA *** observation results indicated r Lc-P5L could cause L929 cells at least two obvious changes:one is nucleus,nuclear chromatin condensed in the margin,nuclear volume became smaller and shrank to be out of shape,or lysed to be debris;the other is cytoskeleton,they became disordered and polarized to make cells atrophic shapes,or even lysed to be *** summary,r Lc-P5L owned potential anticancer activity causing membrane structure damage and genome DNA ***,treatment with different concentration of r Lc-P5L seemingly caused the similar but different changes,whether it indeed gave rise to cancer cells diverse death way,the further studies should be performed,and the detailed mechanisms were still need further explored.

关键词： Larimichthys crocea piscidin 5-like anticancer activity membrane destruction DNA degradation

Performance of ecological restoration in an impaired coral reef in the Wuzhizhou Island, Sanya, China

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2021年第1期39卷 135-147页

作者： Xinqing zheng Yuanchao LI Jilin LIANG Rongcheng LIN Daoru WANG Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China Hainan Academy of Ocean and Fisheries Science Haikou 570125China Fujian Provincial Station for Field Observation and Research of Island and Costal Zone in Zhangzhou Xiamen 361005China Fujian Provincial Key Laboratory of Marine Ecological Conservation and Restoration Xiamen 361005China

Coral restoration is becoming popular to help restoring degraded coral ***,few studies have tried to monitor the long-term recovery of coral reefs,which makes it diffi cult to assess the performance of the *** monitored the growth of three transplanted Acropora corals and naturally-attached Pocillopora damicornis on artifi cial reefs(ARs)from October 2014 to September 2018 during which there were several attacks of *** show that two staghorn Acropora species had the highest growth rates(11.0–12.1 cm/a),followed by table coral ***(5.6 cm/a)and ***(4.8 cm/a).A linear growth pattern was found for the three Acropora species;the pattern gradually slowed in *** was a strong interspecifi c competition for space among the corals on ARs,and it led to the sharply declined occurrence of slow-growing *** colonies in *** recovery was successful at the Wuzhizhou Island and quickly increased AR ***,the ARs made of metal frames fail to resist the direct attack from a catastrophic ***,concrete and environmentalfriendly materials should be used in future *** study is the fi rst report on long-term monitoring and assessment of coral reef restoration in *** results off er future guide of reef restoration for impaired coral reefs in regions easily aff ected by typhoons.

关键词： coral restoration artifi cial reefs coral transplantation Acropora Pocillopora damicornis

Hypoglycemic and hypolipidemic effects of rutin on hyperglycemic rats

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2020年第4期40卷 640-645页

作者： Sun Chen Wang Li Sun Jing Wang zheng Tang Zhishu Shanxi Collborative Innovation Center of Industrialization of Traditional Chinese Medicine Xianyang 712083China Department of Oncological Surgery the Second Affiliated Hospital of Shaanxi University of Traditional Chinese MedicineXianyang 712000China Shaanxi University of Chinese Medicine Xianyang 712046China

OBJECTIVE:To study the effects of rutin on serum glucose and lipid levels in hyperglycemic ***:Male Wistar rats were subjected to intraperitoneal streptozotocin injections and a high-sugar,high-fat diet to establish a hyperglycemic and hyperlipidemic *** model was considered to be successfully established in rats with fasting blood sugar(FBS)≥11.1 mmol/*** study included 6 groups with 10 rats each:a blank control group,a model group,a metformin group,and groups on large,medium and small doses of *** groups received intraperitoneal streptozotocin or normal saline for 21 ***,serum lipids,serum insulin,insulin sensitivity index(ISI),and levels of catalase(CAT),glutathione peroxidase(GSH-Px),superoxide dismutase(SOD)and malondialdehyde(MDA)levels were evaluated in all *** tissue samples were harvested to observe structural changes in islet ***:Large,medium,and small doses of rutin were associated with significantly reduced FBS(P<0.05),and increased levels of ISI,CAT,GSH-Px and SOD,as well as decreased MDA(P<0.05).Rutin administration was also related with reduced total cholesterol,triglycerides and low density lipoprotein chesterol,as well as increased high density lipoprotein chesterol(P<0.05).Histologic evaluation revealed rutin induced repair of damaged islet ***:In diabetic rat models,rutin can significantly reduce FBS and blood lipids,improve anti-oxidant activity,increase insulin sensitivity,and induce repair of damaged islet cells.

关键词： Hyperlipidemias Rutin Hypoglycemic agents Hypolipidemic agents Blood glucose Insulin resistance

Long noncoding RNA AANCR modulates innate antiviral responses by blocking miR-210-dependent MITA downregulation in teleost fish,Miichthys miiuy

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2021年第7期64卷 1131-1148页

作者： Qing Chu Tianjun Xu Weiwei zheng Renjie Chang Lei Zhang Laboratory of Fish Molecular Immunology College of Fisheries and Life ScienceShanghai Ocean UniversityShanghai 201306China Laboratory of Marine Biology and Biotechnology Qingdao National Laboratoiy for Marine Science and TechnologyQingdao 266237China Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources Ministiy of EducationShanghai Ocean UniversityShanghai 201306China National Pathogen Collection Center for Aquatic Animals Shanghai Ocean UniversityShanghai 201306China

Viral infection induces the initiation of antiviral effectors and cytokines which are critical mediators of innate antiviral *** critical molecular determinants are responsible for triggering an appropriate immune *** noncoding RNAs(lncRNAs)have emerged as new gene modulators involved in various biological processes,while how lncRNAs operate in lower vertebrates are still ***,we discover a long noncoding RNA,termed antiviral-associated long noncoding RNA(AANCR),as a novel regulator for innate antiviral responses in teleost *** results indicate that fish MITA plays an essential role in host antiviral responses and inhibition of Siniperca chuatsi rhabdovirus(SCRV)***-210 reduces MITA expression and suppress MITA-mediated antiviral responses,which may help viruses evade host antiviral ***,AANCR functions as a competing endogenous RNA(ceRNA)for miR-210 to control protein abundance of MITA,thereby inhibiting SCRV replication and promoting antiviral *** data not only shed new light on understanding the function role of lncRNA in biological processes in teleost fish,but confirmed the hypothesis that ceRNA networks exist widely in vertebrates.

关键词： long noncoding RNAs microRNA ceRNA MITA antiviral responses teleost fish

Formation of the mass density peak at the magnetospheric equator triggered by EMIC waves

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2021年第1期5卷 32-41页

作者： ZuXiang Xue ZhiGang Yuan XiongDong Yu ShiYong Huang zheng Qiao School of Electronic Information Wuhan UniversityWuhan 420072China

We report a simultaneous observation of two band electromagnetic ion cyclotron(EMIC)waves and toroidal Alfvén waves by the Van Allen Probe *** wave frequency analyses,the mass densityρis found to be locally peaked at the magnetic *** fluxes of ions(<100 eV)increase simultaneously with the appearances of EMIC waves,indicating a heating of these ions by EMIC *** addition,the measured ion distributions also support the equatorial peak formation,which accords with the result of the frequency *** formation of local mass density peaks at the equator should be due to enhancements of equatorial ion concentrations,which are triggered by EMIC waves’perpendicular heating on low energy ions.

关键词： toroidal Alfvén waves EMIC waves magnetoseismology equatorial mass density peak