检索结果-南通市图书馆

Complete polarization control in multimode fibers with polarization and mode coupling

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

Light(Science & Applications) 2018年第1期7卷 603-612页

作者： Wen Xiong Chia Wei Hsu Yaron Bromberg Jose enrique Antonio-Lopez Rodrigo Amezcua Correa Hui Cao Department of Applied Physics Yale UniversityNew HavenCT 06520USA Racah Institute of Physics Hebrew University of JerusalemJerusalem 91904Israel CREOL The College of Optics and PhotonicsUniversity of Central FloridaOrlandoFL 32816USA

Multimode optical fibers have seen increasing applications in communication,imaging,high-power lasers,and ***,inherent imperfections and environmental perturbations cause random polarization and mode mixing,causing the output polarization states to be different from the input polarization *** difference poses a serious issue for employing polarization-sensitive techniques to control light–matter interactions or nonlinear optical processes at the distal end of a fiber ***,we demonstrate complete control of polarization states for all output channels by only manipulating the spatial wavefront of a laser beam into the *** polarization states for individual output channels are generated by wavefront shaping without constraining the input *** strong coupling between the spatial and polarization degrees of freedom in a multimode fiber enables full polarization control with the spatial degrees of freedom alone;thus,wavefront shaping can transform a multimode fiber into a highly efficient reconfigurable matrix of waveplates for imaging and communication applications.

关键词： polarization fiber multimode

Chylous Ascites:A Review of Pathogenesis,Diagnosis and Treatment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Clinical and Translational Hepatology 2018年第1期6卷 105-113页

作者： Richa Bhardwaj Haleh Vaziri Arun Gautam enrique Ballesteros David Karimeddini George Y. Wu Department of Medicine Division of Gastroenterology-HepatologyUCONN HealthFarmingtonCTUSA Department of Pathology and Lab Medicine UCONN HealthFarmingtonCTUSA Department of Diagnostic Imaging and Therapeutics UCONN HealthFarmingtonCTUSA Department of Medicine Division of Gastroenterology-HepatologyUCONN HealthFarmingtonCT 06030USA

Chylous ascites(CA)is a rare form of ascites that results from the leakage of lipid-rich lymph into the peritoneal *** usually occurs due to trauma and rupture of the lymphatics or increased peritoneal lymphatic pressure secondary to *** underlying etiologies for CA have been classified as traumatic,congenital,infectious,neoplastic,postoperative,cirrhotic or *** malignancy and cirrhosis account for about two-thirds of all the cases of CA in Western countries,in this article we have attempted to reclassify CA based on portal and non-portal *** diagnosis of CA is based on the distinct characteristic of the ascitic fluid which includes a milky appearance and a triglyceride level of>200 mg/*** management consists of identifying and treating the underlying disease process,dietary modification,and *** studies have also supported the use of agents such as orlistat,somatostatin,octreotide and *** and surgical interventions in the form of transjugular intrahepatic portosystemic shunt(commonly known as TIPS),peritoneal shunt,angiography with embolization of a leaking vessel,and laparotomy remain as treatment options for cases refractory to medical management.

关键词： Chylous ascites Portal hypertension Cirrhosis Ascitic fluid Lymphatic system

Effect of the manipulation of the duodenal papilla during double balloon enteroscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2016年第17期22卷 4330-4337页

作者： Rafael Latorre Octavio López-Albors Federico Soria Eugenia Candanosa enrique Pérez-Cuadrado Department of Anatomy and Comparative Pathology Veterinary Faculty University of Murcia Campus Universitario de Espinardo 30100 Murcia Spain Minimally Invasive Surgery Center Jesus Uson 10071 Caceres Spain Unit of Digestive Diseases Morales Meseguer University Hospital 30008 Murcia Spain

AIM: To determine the hypothesis that inflating the balloons in the duodenal papilla determines changes in the biochemical markers of ***: Four groups of pigs were used: Group papilla(GP), the overtube's balloon was inflated in the area of the papilla; GP + double balloon enteroscopy(GP + DBE), the overtube's balloon was kept inflated in the area of the papilla for 20 min before a DBE; Group DBE(GDBE), DBE was carried out after insuring the balloon's inflation far from the pancreatic papilla; and Group control(GC). Serum concentrations of amylase, lipase and C-reactive protein(CRP) were evaluated. Pancreases were processed for histopathology ***: Main changes occurred 24 h after the procedure compared with baseline levels. Amylase levels increased significantly in GP(59.2% higher) and were moderately higher in groups GP + DBE and GDBE(22.7% and 20%, respectively). Lipase increased in GP and GP + DBE, whereas it hardly changed in GDBE and in GC. CRP increased significantly in GP, GP + DBE and GDBE, while no changes were reported for GC. No statistically significant difference between groups GP and GP + DBE was found for the histopathological findings, except for vacuolization and necrosis of the pancreatic parenchyma that was higher in GP than in GP + ***: The manipulation of the duodenal papilla by the inflated overtube's balloon during DBE causes pancreatic structural damage and increased biochemical markers associated with pancreatitis.

关键词： Duodenal papilla Double balloon enteroscopy Pancreas Animal model Pancreatitis

Flavor violating Higgs signals in the Texturized Two-Higgs Doublet Model (THDM-Tx)

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 Physics C 2016年第12期40卷 22-36页

作者： M. A. Arroyo-Urefna J. Lorenzo Diaz-Cruz enrique Diaz Javier A. Orduz-Ducuara Facultad de Ciencias Fisico-Matematicas Benemerita Universidad Autonoma de Puebla C.P. 72570 Puebla Pue. Mexico.

Flavor violating Higgs signals, such as the top FCNC decay t→ch0 and the LFV Higgs decay h0→τμ, have been studied at the LHC. These signals can arise within the general Two-Higgs Doublet Model （THDM）, where each Higgs doublet couples to all fermion types through Yukawa matrices Yf 1 and Y f2 . The Yukawa matrices can be assumed to have the same form or they could have different structures. In this paper we study the case when both Yf1 and Y f2 have completely different forms, but in such a way that they complement to produce a specific hermitian mass matrix. We find that for specific four-zero textures, the flavor violating Higgs couplings depend only on the free parameters tan β, γf and the fermion masses. We use the current bounds on the low energy processes to derive constraints on the heavy Higgs boson mass, tanβand γf Then, we use these constraints to evaluate the LFV Higgs decays, which reach branching ratios that could be tested at the LHC.

关键词： THDM LFV textures

Geo-registered 3D models from crowdsourced image collections

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

Geo-Spatial Information Science 2013年第1期16卷 55-60页

作者： Jan-Michael FRAHM Jared HEINLY Enliang ZHENG enrique DUNN Pierre FITE-GEORGEL Marc POLLEFEYS Department of Computer Science University of North Carolina at Chapel HillBrooks Computer Science BuildingCB#3175Chapel HillNC 27599USA Dekko Inc. San FranciscoUSA Department of Computer Science Eidgenössische Technische Hochschule ZürichZürichSwitzerland

In this article we present our system for scalable,robust,and fast city-scale reconstruction from Internet photo collections(IPC)obtaining geo-registered dense 3D *** major achievements of our system are the efficient use of coarse appearance descriptors combined with strong geometric constraints to reduce the computational complexity of the image overlap *** unique combination of recognition and geometric constraints allows our method to reduce from quadratic complexity in the number of images to almost linear complexity in the IPC ***,our 3D-modeling framework is inherently better scalable than other state of the art methods and in fact is currently the only method to support modeling from millions of *** addition,we propose a novel mechanism to overcome the inherent scale ambiguity of the reconstructed models by exploiting geo-tags of the Internet photo collection images and readily available StreetView panoramas for fully automatic geo-registration of the 3D ***,our system also exploits image appearance clustering to tackle the challenge of computing dense 3D models from an image collection that has significant variation in illumination between images along with a wide variety of sensors and their associated different radiometric camera *** algorithm exploits the redundancy of the data to suppress estimation noise through a novel depth map *** fusion simultaneously exploits surface and free space constraints during the fusion of a large number of depth *** volume compression during the fusion achieves lower memory requirements for high-resolution *** demonstrate our system on a variety of scenes from an Internet photo collection of Berlin containing almost three million images from which we compute dense models in less than the span of a day on a single computer.

关键词： 3d modeling structure from motion photo collection modeling

Gut microbes limit growth in house sparrow nestlings(Passer domesticus)but not through limitations in digestive capacity

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 2018年第2期13卷 139-151页

作者： Kevin D.KOHL Antonio BRUN Seth R.BORDENSTEIN enrique CAVIEDES-VIDAL William H.KARASOV Department of Biological Sciences Vanderbilt UniversityNashvilleTennesseeUSA Department of Biological Sciences University of PittsburghPittsburghPennsylvaniaUSA Department of Forest and Wildlife Ecology University of Wisconsin-MadisonMadisonWisconsinUSA Department of Pathology Microbiologyand ImmunologyVanderbilt UniversityNashvilleTennesseeUSA Institute for Multidisciplinary Research in Biology of San Luis National Scientific and Technical Research CouncilSan LuisArgentina Department of Biochemistry and Biological Sciences Universidad Nacional de San LuisSan LuisArgentina

Recent research often lauds the services and beneficial effects of host-associated microbes on ***,hosting these microbes may come at a *** example,germ-free and antibiotic-treated birds generally grow faster than their conventional *** the wild,juvenile body size is correlated with survival,so hosting a microbiota may incur a fitness *** altricial nestlings represent an interesting study system in which to investigate these interactions,given that they exhibit the fastest growth rates among vertebrates,and growth is limited by their digestive *** investigated whether reduction and restructuring of the microbiota by antibiotic treatment would:(i)increase growth and food conversion efficiency in nestling house sparrows(Passer domesticus);(ii)alter aspects of gut anatomy or function(particularly activities of digestive carbohydrases and their regulation in response to dietary change);and(iii)whether there were correlations between relative abundances of microbial taxa,digestive function and nestling *** treatment significantly increased growth and food conversion efficiency in *** did not alter aspects of gut anatomy that we considered but depressed intestinal maltase *** were no significant correlations between abundances of microbial taxa and aspects of host ***,we conclude that microbial-induced growth limitation in developing birds is not driven by interactions with digestive ***,decreased energetic and material costs of immune function or beneficial effects from microbes enriched under antibiotic treatment may underlie these *** the costs and tradeoffs of hosting gut microbial communities represents an avenue of future research.

关键词： antibiotics food conversion efficiency gut microbiota host-microbe interactions maltase

Single droplet drying of detergents:Experimentation and modelling

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 2021年第5期19卷 35-47页

作者： Borja Hernandez Rosa Mondragon Mark A.Pintoa Leonor Hernandez J.enrique Julia Juan Carlos Jarque Sergio Chiva Mariano Martin Newcastle Innovation Centre Procter&Gamble R&DNewcastle upon TyneUK Departamento de Ingenieria Quimica y Textil.Universidad de Salamanca SalamancaSpain Departamento de Ingenieria Mecanica y Construccion Universitat Jaume ICastellon de la PlanaSpain Instituto de Tecnologia Ceramica Universitat Jaume ICastellon de la PlanaSpain

This study evaluates the single droplet drying(SDD)of *** data are used to validate a theoretical multistage *** experiments are carried out in an acoustic levitator analysing six different detergent formulations at 393 *** work is completed by developing a model based on conservation *** model is composed of the three stages observed in the drying *** the first stage,an external surface drying stage occurs until the surface is saturated and the crust is *** the next stage,the drying rate is governed by diffusion through the *** the same time,the particle heats up until boiling conditions are achieved in the core of the *** this point,the third stage *** the final stage,the droplet core is in boiling conditions which are governed by the pressure drop through the crust and the concentration of *** model has been evaluated for the different formulations being flexible to predict the drying of different mixtures with good accuracy.

关键词： Drying Single droplet Acoustic levitator Detergents

Comparison of Chemical and Functional Properties of Stevia rebaudiana(Bertoni)Varieties Cultivated in Mexican Southeast

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2014年第3期5卷 286-293页

作者： Maira Segura-campos enrique Barbosa-Martín Angel Matus-Basto Diana Cabrera-Amaro María Murguía-Olmedo Yolanda Moguel-Ordonez David Betancur-Ancona Facultad de Ingeniería Química Universidad Autónoma de YucatánYucatanMexico Instituto Nacional de Invesigaciones Forestales Agrícolas y Pecuarias(INIFAP)YucatanMexico

The leaf powders from two varieties of Stevia rebaudiana (Bertoni) cultivated in Yucatan, Mexico were analyzed for their proximate composition, dietary fiber composition and functional properties. The leaf powders were a good source of carbohydrates (64.06%-67.98%), protein (12.11%-15.05%), and crudefiber (5.92%-9.52%). Total dietary fiber content in the S. rebaudiana leaf powders were 28.61 (Morita II) and 29.12 (Criolla) g/100g sample, with most of this content represented by insoluble dietary fiber 87.79% (Morita II) and 70.02% (Criolla). Neutral detergent fiber (NDF), acid detergent fiber (ADF) and acid detergent lignin (ADL) were higher in Criolla (19.29%, 17.77%, 8.98%) than Morita II variety (18.11%, 14.16%, 2.28%). Hemicellulose and cellulose were higher in Morita II (3.96%, 11.78%) than criolla variety (1.51%, 8.79%). Functional properties of leaf powder from Morita II and Criolla were, water-holding capacity (2.87-4.07 g/g sample), oil-holding capacity (6.49-6.79 g/g sample), water-absorption capacity (3.41-3.44 g/g sample), water-adsorption capacity (0.25-0.28 g/g sample), and organic molecule absorption capacity (1.13-1.81 g/g sample). These suggest that S. rebaudiana (Bertoni) leaf powders may be used as dietary supplement or as food additive.

关键词： Stevia rebaudiana(Bertoni) Physico-Chemical Properties Dietary Fiber Functional Properties

Intravascular Foreign Bodies： A Single-Institution Experience and Description of a Novel Modified Percutaneous Retrieval Technique

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 Medical Journal 2018年第4期131卷 484-485页

作者： Mario enrique Baltazares-Lipp Benito Sarabia-Ortega Juan Ignacio Soto-gonzalez Carlos Manuel Aboitiz-Rivera Hector A Carmona-Ruiz Ruben Blachman-Braun Department of Hemodynamics and Echocardiography National Institute of Respiratory Diseases "Ismael Cosio Villegas" 14080 Mexico City Mexico Centro de Investigacion en Ciencias de la Salud F-acultad de Ciencias de la Saludl Universidad Anahuac Mexico Campus Norte Estado de Mexico 52786 Mexico

To the Editor： Catheters are frequently used as diagnostic and therapeutic devices that are frequently placed in critically ill patients. In addition, with the advantage of radiologic technology, the number of minimally invasive endovascular procedures has increased, and consequently the reports of intravascular foreign bodies （IFBs） and the numerous described IFBs retrieval technique.

关键词：