检索结果-南通市图书馆

Hepatobiliary Surgery and Nutrition 2018年第6期7卷 508-514页

作者： andre Miao Santeria Qiu Editorial Office AME Publishing Company

Throughout the ages,the autumn in Beijing has been praised for its beauty by poets and *** seems to have a unique,magic power that can attract every *** was in such a wonderful setting that the 6th Joint Conference on Surgery and Academic Skills was successfully convened at the University of Chicago Center in *** conference was held from September 14–15,and jointly sponsored by the Peking Union Medical College Hospital,AME Publishing Company,Hepatobiliary Surgery and Nutrition(HBSN),the University of Chicago Global Surgery,the University of Chicago Department of Surgery,and the University of Chicago Center in *** year's conference mainly included five sessions:precision medicine,genomic therapy,modifying hosts and diseases,new insights into targeting malignancies,and finally,academic and publishing *** whole conference was aimed at examining both the science and art of providing precision medicine and surgery to patients with solid *** of experts and scholars from home and abroad attended this fabulous meeting and shared their research progress,along with their unique experience(Figure 1).

关键词： Surgery Chicago precise

A New Family of Moths from the Middle Jurassic(Insecta:Lepidoptera)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2010年第4期84卷 874-885页

作者： HUANG Diying andre NEL Joeel MINET Nanjing Institute of Geology and Palaeontology State Key Laboratory of Palaeobiology and Stratigraphy Chinese Academy of Sciences Nanjing 210008 China UMR CNRS 7205 Museum National d＇Histoire Naturelle Departement Systematique et Evolution C.P. 50 Entomologie F-75231 Paris Cedex 05 France

Three lepidopteran species, from the Middle Jurassic Daohugou beds （inner Mongolia, China）, are described in a new family, Mesokristenseniidae, and new genus, Mesokristensenia, which could represent the sister group of the Micropterigidae. Mesokristensenia differs from all extant Lepidoptera, but one genus （Agathiphaga, Agathiphagidae）, in retaining four median veins in the forewing, a plesiomorphy also present in many Trichoptera. Evidence for placing Mesokristensenia in the Lepidoptera includes four traits, notably a previously unrecorded autapomorphy of this insect order： beyond stem Ml＋2, vein M1 is bent and connected to cross-vein r-m （in both wing pairs）. Among 24 characters taken into account to assess the systematic position of Mesokristensenia, 12 are considered informative for a cladistic analysis involving this fossil taxon and the four suborders recognized in present-day Lepidoptera （Zeugloptera, Aglossata, Heterobathmiina, and Glossata）.

关键词： Trichoptera Lepidoptera Mesokristenseniidae wing venation phylogeny China Middle Jurassic

Levothyroxine therapy and impaired clearance are the strongest contributors to small intestinal bacterial overgrowth: Results of a retrospective cohort study

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2017年第5期23卷 842-852页

作者： Thorsten Brechmann andre Sperlbaum Wolff Schmiegel Department of Gastroenterology and Hepatology Berufsge--nossenschaftliches Universit?tsklinikum Bergmannsheil GmbHRuhr--University Bochum44789 BochumGermany

AIM To identify a set of contributors, and weight and rank them on a pathophysiological *** Patients who have undergone a lactulose or glucose hydrogen breath test to rule out small intestinal bacterial overgrowth(SIBO) for various clinical symptoms, including diarrhoea, weight loss, abdominal pain, cramping or bloating, were seen as eligible for inclusion in a retrospective single-centre study. Clinical data such as co-morbidities, medication, laboratory parameters and other possible risk factors have been identified from the electronic data system. Cases lacking or with substantially incomplete clinical data were excluded from the analysis. Suspected contributors were summarised under four different pathophysiological pathways(impaired gastric acid barrier, impaired intestinal clearance, immunosuppression and miscellaneous factors including thyroid gland variables) and investigated using the χ2 test, Student's t-test and logistic regression *** A total of 1809 patients who had undergone hydrogen breath testing were analysed. Impairment of the gastric acid barrier(gastrectomy, odds ratio: OR = 3.5, PPI therapy OR = 1.4), impairment of intestinal clearance(any resecting gastric surgery OR = 2.6, any colonicresection OR = 1.9, stenosis OR = 3.4, gastroparesis OR = 3.4, neuropathy 2.2), immunological factors(any drug-induced immunosuppression OR = 1.8), altered thyroid gland metabolism(hypothyroidism OR = 2.6, levothyroxine therapy OR = 3.0) and diabetes mellitus(OR = 1.9) were associated significantly to SIBO. Any abdominal surgery, ileocecal resection, vagotomy or Ig A-deficiency did not have any influence, and a history of appendectomy decreased the risk of SIBO. Multivariate analysis revealed gastric surgery, stenoses, medical immunosuppression and levothyroxine to be the strongest predictors. Levothyroxine therapy was the strongest contributor in a simplified model(OR = 3.0).CONCLUSION The most important contributors for the development of SI

关键词： Bacterial overgrowth syndrome Hydrogen breath tests Immunosuppression Intestinal motility Hypothyroidism

On the local convergence of a stochastic semismooth Newton method for nonsmooth nonconvex optimization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2022年第10期65卷 2151-2170页

作者： andre Milzarek Xiantao Xiao Zaiwen Wen Michael Ulbrich School of Data Science The Chinese University of Hong KongShenzhenShenzhen 518172China Shenzhen Research Institute of Big Data Shenzhen 518172China Shenzhen Institute of Arti cial Intelligence and Robotics for Society Shenzhen 518172China School of Mathematical Sciences Dalian University of TechnologyDalian 116024China Beijing International Center for Mathematical Research Peking UniversityBeijing 100871China Department of Mathematics Technical University of MunichGarching bei Munchen 85748Germany

In this work,we present probabilistic local convergence results for a stochastic semismooth Newton method for a class of stochastic composite optimization problems involving the sum of smooth nonconvex and nonsmooth convex terms in the objective *** assume that the gradient and Hessian information of the smooth part of the objective function can only be approximated and accessed via calling stochastic firstand second-order *** approach combines stochastic semismooth Newton steps,stochastic proximal gradient steps and a globalization strategy based on growth *** present tail bounds and matrix concentration inequalities for the stochastic oracles that can be utilized to control the approximation errors via appropriately adjusting or increasing the sampling *** standard local assumptions,we prove that the proposed algorithm locally turns into a pure stochastic semismooth Newton method and converges r-linearly or r-superlinearly with high probability.

关键词： nonsmooth stochastic optimization stochastic approximation semismooth Newton method stochastic second-order information local convergence

Fragility Assessment of Pre-Northridge Steel Moment Frames Using Finite-Length Plastic Hinge Elements and Concentrated Plasticity Fracture Elements

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2019年第9期120卷 657-676页

作者： Filipe L.A.Ribeiro andre RBarbosa Luis CNeves National Laboratory of Civil Engineering(LNEC)&CERIS-Civil Engineering Research and Innovation for Sustainability DECivilUniversity of LisbonLisbonPortugal School of Civil and Construction Engineering Oregon State UniversityOregonUSA and University of BristolBristolUK Resilience Engineering Research Group University of NottinghamNottinghamUK.

Although pre-Northridge earthquake steel moment resisting frame buildings have been shown to be susceptible to brittle connection failures,they still represent a large fraction of the existing steel buildings in the United States of *** this study,the performance of the 3-and 9-story Los Angeles pre-Northridge SAC buildings are analyzed considering ductile and brittle beam-column connection failures,and their *** paper contributes to understanding the influence of uncertainty associated with connections brittle fracture on building interstory deformation capacity and its impact on bias and variability of fragility functions and loss *** results show that considering brittle connections leads to significantly l arger d rift demands a nd t o h igher r epair costs,particularly under intense ground *** fragility curve parameters are derived that account for the effect of the uncertainty of the strength and deformation capacity of brittle connections.

关键词： Brittle fracture finite-length p lastic h inge f ragility c urves r epair c ost ratio welded-flange connections

Monitoring the effects of land transformation on African clawless otters(Aonyx capensis)using fecal glucocorticoid metabolite concentrations as a measure of stress

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2020年第4期15卷 293-306页

作者： Tshepiso L.MAJELANTLE Trevor MCINTYRE andre GANSWINDT Mammal Research Institute Department of Zoology and EntomologyUniversity of PretoriaPretoriaSouth Africa Department of Life and Consumer Sciences University of South AfricaPretoriaSouth Africa Endocrine Research Laboratory Department of Anatomy and PhysiologyUniversity of PretoriaOnderstepoortSouth Africa Centre for Veterinary Wildlife Studies Faculty of Veterinary ScienceUniversity of PretoriaOnderstepoortSouth Africa

In a time of increasing environmental change caused by anthropogenic disturbance,there is a greater need to understand animal adaptations to manmade *** this regard,the measurement of stress-related endocrine markers provides a useful tool to examine the impact of environmental challenges and the physiological consequences for wildlife occupying such *** aims of the present study were to validate fecal glucocorticoid metabolite(fGCM)concentrations as a measure of stress using samples from a male African clawless otter(Aonyx capensis;n=1)and to compare fGCM concentrations of otters occurring in a transformed and in 2 natural areas in South *** the 5 different enzyme-immunoassays(EIA)tested,a cortisol and oxoetiocholanolone(measuring 11,17 dioxoandrostanes)EIA revealed the highest response(74%and 48%increase,respectively)30 and 24 hours after a stress event(translocation of a captive individual as part of its rehabilitation prior to release),respec*** both EIAs,fGCM concentrations were comparable for samples collected up to 3 h *** the cortisol EIA for subsequent analyses,fGCM concentrations of animals from the transformed area(n=20;mean[±SD]:0.468[±0.539]µg/g dry weight[DW])were significantly higher(P=0.013)than those from otters in the natural areas(n=17;0.242[±0.226]µg/g DW).These preliminary results suggest that African clawless otters may have increased adrenocortical activity that could be due to conditions linked to living in a transformed environment.

关键词： African clawless otter fecal glucocorticoid metabolites non-invasive hormone measurement stress urbanization

CFD-DEM simulation and experimental investigation of the flow behavior of lunar regolith JSC-1A

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2018年第5期16卷 34-43页

作者： Hendrik Otto Kristin Kerst Christoph Roloff Gabor Janiga andre Katterfeld Chair of Conveying Technologies University of Magdeburg "Otto yon Guericke'MagdeburgGermany Laboratory of Fluid Dynamics and Technical Flows University of Magdeburg "Otto yon Guericke"MagdeburgGermany

Rovers on Mars and the Moon analyze the local geology by collecting samples of the upper layer in containers and *** the analysis,the complete discharge of samples from the reservoir must be *** of the low atmospheric pressure,reduced gravity,and different grain shapes of the bulk material,the discharge process is very different compared to that on *** this study,the behavior of lunar regolith JSC-1A in closed containers during discharge was investigated by analyzing the flow in an hourglass under the Earth's *** fluidization of the top particle layer was observed during the outflow of the upper half of the *** particles were fluidized by the displacement flow initiated by failing particles in the completely closed *** complex problem was simulated by coupling computational fluid dynamics (CFD)with the discrete element method (DEM). A CFD-DEM simulation with 1million particles was *** billions of particles are present in the actual system,the use of a coarse graining approach was *** addition,high-speed camera measurements were used to determine the velocities of individual particles to validate the simulation. The fluidization effect was successfully simulated using the coupled method.

关键词： CFD-DEM simulation Flow behavior Lunar regolith JSC-1A Experiment

Studying Formability Limits By Combining Conventional and Incremental Sheet Forming Process

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2021年第4期34卷 78-89页

作者： Fabio andre Lora Daniel Fritzen Ricardo Alves de Sousa Lirio Schaffer Department of Materials Engineering Federal University of Recôncavo da BahiaCampus CETENSFeira de SantanaBahia 44085-132Brazil SATC Uni-versity CriciumaBrazil Center of Mechanical Technology and Automation Department of Mechanical EngineeringUniversity of Aveiro3810-193 AveiroPortugal Federal University of Rio Grande do Sul Porto AlegreBrazil

In this work it is assessed the potential of combining conventional and incremental sheet forming processes in a same sheet of *** so-called hybrid forming approach is performed through the manufacture of a pre-forming by conventional forming,followed by incremental sheet *** main objective is analyzing strain *** pre-forming induced in the conventional forming stage will determine the strain paths,directly influencing the strains produced by the incremental *** conduct the study,in the conventional processes,strains were imposed in three different ways with distinct true *** the incremental stage,the pyramid strategy was adopted with different wall *** the experiments,the true strains and the final geometries were *** simulation was also employed for the sake of comparison and correlation with the measured *** could be observed that single-stretch pre-strain was directly proportional to the maximum incremental strains achieved,whereas samples subjected to biaxial pre-strain influenced the formability according to the degree of pre-strain ***-strain driven by the prior deep-drawing operation did not result,in this particular geometry,in increased formability.

关键词： Hybrid forming process Incremental sheet forming Strain paths Numerical simulation

Application of Earth Remote Sensing and GIS in Mapping Land Cover Patterns in Kinangop Division, Kenya

在线全文

学校读者我要写书评

暂无评论

遥感学报 2010年第1期14卷 180-186页

作者： Kennedy Okello WERE andre KOOIMAN Kenya Agricultural Research Institute National Agricultural Research Laboratories P.O. Box 14733-00800 Nairobi Kenya Department of Natural Resource Management International Institute for Geo-information Science and Earth Observation (ITC) 7500 AA Enschede The Netherlands

Land cover is a fundamental variable that links many facets of the natural environment and a key driver of global environmental *** in its status can have significant ramifications at local,regional and global ***,it is imperative to map land cover at a range of spatial and temporal scales with a view to understanding the inherent patterns for effective characterization,prediction and management of the potential environmental *** paper presents the results of an effort to map land cover patterns in Kinangop division,Kenya,using geospatial *** is a geographic locality that has experienced rapid land use transformations since Kenya's independence culminating in uncontrolled land cover changes and loss of *** changes in land use/cover constrain the natural resource base and presuppose availability of quantitative and spatially explicit land cover data for understanding the inherent patterns and facilitating specific and multi-purpose land use planning and *** such,the study had two objectives viz.(i) mapping the spatial patterns of land cover in Kinangop using remote sensing and GIS and;(ii) evaluating the quality of the resultant land cover *** satellite imagery acquired in January 23,2007 was procured and field data gathered between September l0 and October 16,*** latter were used for training the maximum likelihood classifier and validating the resultant land cover *** land cover classification yielded 5 classes,overall accuracy of 83.5%and kappa statistic of 0.79,which conforms to the acceptable standards of land cover mapping. This qualifies its application in environmental decision-making and manifests the utility of geospatial techniques in mapping land resources.

关键词：映射 GIS 肯尼亚遥感技术

Repeated occurrence of palaeo-wildfires during deposition of the Bahariya Formation(early Cenomanian) of Egypt

在线全文

学校读者我要写书评

暂无评论

Journal of Palaeogeography 2019年第4期8卷 332-345页

作者： Haytham El Atfy Tarek Anan andre Jasper Dieter Uhl Department of Geology Faculty of ScienceMansoura UniversityMansoura 35516Egypt Programa de Pos-Graduacao em Ambiente e Desenvolvimento PPGADUniversidade do Vale do Taquari UnivatesLajeadoRio Grande do SulBrazil Senckenberg Research Institute and Natural History Museum 60325 Frankfurt am MainGermany Senckenberg Centre for Human Evolution and Palaeoenvironment Tubingen University72076 TubingenGermany

The Upper Cretaceous(early Cenomanian)Bahariya Formation of Egypt has an outstanding reputation for its wealth of vertebrate remains,including a variety of iconic dinosaurs,like the carnivorous Spinosaurus and Carcharodontosaurus,as well as the herbivorous Aegyptosaurus and *** these dinosaur fossils,the Bahariya Formation yielded also a wealth of invertebrate and plant remains,but even today many aspects concerning the continental palaeoenvironments reflected in these deposits(including the occurrence of palaeo-wildfires)have not been studied in *** far six distinct macro-charcoal bearing levels could be identified within the type section of the Bahariya Formation at Gabal El Dist profile,one of the most prolific outcrops of this formation in terms of fossil occurrence located in the north of the Bahariya Oasis,Western Desert,*** of the charcoal investigated by means of SEM originates from ferns,pointing to a considerable proportion of this plant group within the palaeo-ecosystems that experienced *** and(putative)angiosperms have less frequently been *** collected data present evidence that the landscapes at the northern shores of Gondwana repeatedly experienced palaeo-wildfires,adding extra proof to previous statements that the Late Cretaceous was a fiery world on a global scale.

关键词： Bahariya Oasis Gabal El Dist Charcoal Wildfire Dinosaurs Upper Cretaceous Early Cenomanian Egypt