检索结果-南通市图书馆

CSEE Journal of.Power and Energy Systems 2024年第3期10卷 963-973页

作者： Wenjuan Du Yang Wang H.f.Wang Tao Zhao Tim Littler College of.Electrical Engineering Sichuan UniversityChengduChina School of.Electrical Engineering the Queen’s University of BelfastBelfastUK IEEE

The induction generator ef.ect(IGE)and the openloop modal proximity(OLMP)are two dif.erent reasons why subsynchronous oscillations(SSOs)in a series-compensated power system(SCPS)may *** IGE attributes the growing SSOs to negative resistance,while the OLMP explains the SSO mechanism f.om the standpoint of.modal *** this paper,we investigate the connections between the IGE and the OLMP through equivalent RLC circuit and open-loop modal *** investigation is conducted f.r two types of.seriescompensated power systems where either a synchronous generator or a Df.G is connected at the sending *** investigation reveals the conditions,in which the IGE and the OLMP may jointly cause the growing SSOs,i.e.,both the IGE and the OLMP can explain why the growing SSOs ***,the investigation indicates that the IGE and the OLMP may be totally irrelevant and lead to growing SSOs *** implies that it is possible that in a SCPS,the growing SSOs are only due to the IGE,and the OLMP is non-existent,and vice ***,when the growing SSOs occurs in a SCPS,examination based on both the IGE and the OLMP should be caref.lly conducted in order to f.nd if.the oscillatory instability is due to the IGE,or the OLMP,or both of.them.

关键词： Induction generator ef.ect open-loop modal proximity series compensation sub-synchronous oscillations

Understanding intrarenal backf.ow: Intrarenal pressure during ureteroscopy and beyond

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of.Urology 2024年第2期11卷 139-142页

作者： Palle J.S.Osther Susanne S.Osther Maria P.Hesselholt Sof.a Byllov Søren K.Lildal Louise f.Øbro Helene Jung Urological Research Center Department of UrologyVejle Hospital(a part of Lillebaelt Hospital)University Hospital of Southern DenmarkVejleDenmark Department of.Regional Health Research University of Southern DenmarkOdenseDenmark

The number of.ureterorenoscopic procedures f.r upper urinary tract stone management has increased dramatically during recent years worldwide[1].Developments in f.exible ureteroscope and laser technology have made it possible to successf.lly address larger and more complex stone scenarios *** the other hand,this means that more and more patients are exposed to the potential adverse ef.ects of.ureteroscopy[2].In general,ureteroscopy is considered a saf. ***,serious complications and even deaths do occur,and these events are most likely underreported[3,4].

关键词： beyond likely ureter

All-electron basis sets f.r H to Xe specif.c f.r ZORA calculations:Applications in atoms and molecules

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 B 2024年第8期33卷 238-246页

作者： C.S.Gomes f.E.Jorge A.Canal Neto Departamento de f.sica Universidade Federal do Espirito Santo29075-910 VitoriaESBrazil Departamento de f.sica Instituto de Ciencias Exatas e BiologicasUniversidade Federal de Ouro Preto Campus Universitario Morro do Cruzeiro35402-136 Ouro PretoMGBrazil

A segmented basis set of.quadruple zeta valence quality plus polarization f.nctions(QZP)f.r H through Xe was developed to be used in conjunction with the ZORA *** set was augmented with dif.use f.nctions to describe electrons f.rther away f.om the nuclei *** the ZORA-CCSD(T)/QZP-ZORA theoretical model,atomic ionization energies and bond lengths,harmonic vibrational f.equencies,and atomization energies of.some molecules were *** addition of.core-valence corrections has been shown to improve the agreement between theoretical and experimental results f.r molecular *** atomization energies,a similar observation emerges when considering spin-orbit *** the augmented QZP-ZORA set,static mean dipole polarizabilities of.a set of.atoms were calculated and compared with previously published recommended and experimental *** evaluations of.the ZORA and Douglas–Kroll–Hess Hamiltonians were made f.r each property studied.

关键词： QZP-ZORA and AQZP-ZORA basis sets elements f.om H to Xe CCSD(T)method atomic and molecular properties

Radiative loss of.coherence in f.ee electrons:a long-range quantum phenomenon

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) 2024年第2期13卷 294-301页

作者： Cruz I.Velasco Valerio Di Giulio f.Javier García de Abajo ICf.-Institut de Ciencies f.toniques The Barcelona Institute of Science and Technology08860Castelldefels(Barcelona)Spain ICREA-InstitucióCatalana de Recerca i Estudis Avançats Passeig Lluís Companys 2308010BarcelonaSpain

Quantum physics rules the dynamics of.small objects as they interact over microscopic length ***,quantum correlations involving macroscopic distances can be observed between entangled photons as well as in atomic gases and matter waves at low *** long-range nature of.the electromagnetic coupling between charged particles and extended objects could also trigger quantum phenomena over large ***,we reveal a manif.station of.quantum mechanics that involves macroscopic distances and results in a nearly complete depletion of.coherence associated with which-way f.ee-electron interf.rence produced by electron-radiation coupling in the presence of.distant extended *** is a ubiquitous ef.ect that we illustrate through a rigorous theoretical analysis of.a two-path electron beam interacting with a semi-inf.nite metallic plate and f.nd the inter-path coherence to vanish proportionally to the path separation at zero temperature and exponentially at f.nite *** investigated regime of.large distances originates in the coupling of.the electron to radiative modes assisted by dif.raction at material structures but without any involvement of.material *** the f.ndamental interest of.this macroscopic quantum phenomenon,our results suggest an approach to measuring the vacuum temperature and nondestructively sensing the presence of.distant objects.

关键词： temperature quantum macroscopic

Gastroesophageal ref.ux and Helicobacter pylori:a review

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 2000年第3期6卷 9+312-314,312-314页

作者： f.Pace G bianchi Porro Department of.Gastroenterology L.Sacco University HospitalMilanItaly

INTRODUCTION Since the observation by Labenz et al thateradication of.Helicobacter pylori(Hp)inf.ctionmay be f.llowed by development of.ref.uxesophagitis in a relevant proportion of.duodenalulcer patients previously ... 详细信息

关键词： gastroesophageal ref.ux/therapy Helicobacter pylori epidemiology peptic ulcer/therapy stomach neoplasms/therapy Helicobacter inf.ctions

Hygrothermal Properties of.a Composite Based on Clay Soils and Diatomite

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of.Civil Engineering 2024年第3期14卷 363-373页

作者： Togdjim Jonas Malloum Soultan Modjinguem f. Ronelngar Mahamat S. Abdel-Khadir Alexis M. Nanimina Michel Querry Mechanical Engineering Department Higher National Institute of Sciences and Techniques of Abch Abch Chad Technology Department University of NDjamena NDjamena Chad National Center f.r Development Research (CNRD) NDjamena Chad Mechanical Department National Institute Superior of Sciences Appliqued Lyon France

The purpose of.this paper is to make a contribution to the use of.diatomite as a mineral additive in the composition of.compressed earth blocks. The aim is to study the inf.uence of.diatomite on the hygrothermal behaviour of.composites based on clay soils. f.r this reason, two clay soils with dif.erent physicochemical and mineralogical compositions were incorporated with diatomite at percentages ranging f.om 5% to 50% with a step of.5 to produce compressed earth blocks. Af.er assessing the hydric and thermal characteristics of.the composites, it was f.und that the incorporation of.diatomite into the clay matrix f.vours the absorption of.water by capillary action f.r all the composites. The diatomite-amended blocks subjected to the rain erosion test were less eroded than the unamended blocks. In addition, BYD composites were f.und to be more resistant than BTD composites, due to the high percentage of.clay in T soil. The thermal conductivity of.the latter decreases respectively f.om 0.72 to 0.29 W/m∙K f.r BTD composites and f.om 0.52 to 0.21 W/m∙K f.r BYD composites. This reduction proves the thermal insulating properties of.diatomite. Despite the high capillary absorption capacity of.these composites, they have good thermal properties, enabling them to be used in the construction of.buildings f.r improved indoor thermal comf.rt.

关键词： Clay Soil Diatomite Capillary Absorption Erodibility and Thermal Conductivity

Application of.novel constrained f.iction processing method to produce f.ne grained biomedical Mg-Zn-Ca alloy

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.Magnesium and Alloys 2024年第2期12卷 516-529页

作者： Ting Chen Banglong f. Junjun Shen Uceu f.H.R.Suhuddin Björn Wiese Yuanding Huang Min Wang Jorge f.dos Santos Jean Pierre Bergmann Benjamin Klusemann Solid State Materials Processing Institute of Material MechanicsHelmholtz-Zentrum HereonMax-Planck-Str.1Geesthacht 21502Germany f.nctional Magnesium Materials Institute of Metallic BiomaterialsHelmholtz-Zentrum HereonMax-Planck-Str.1Geesthacht 21502Germany Shanghai Key Laboratory of.Materials Laser Processing and Modif.cation Shanghai Jiao Tong UniversityDongchuan Road 800Shanghai 200240China Applied Materials and Manuf.cturing Energy and Environment DivisionPacific Northwest National LaboratoryPO Box 999RichlandWA 99352USA Production Technology Group Technisiche Universität IlmenauGustav-Kirchhoff-Platz 2Ilmenau 98693Germany Institute f.r Production Technology and Systems Leuphana University of LüneburgUniversitätsallee 1Lüneburg 21335Germany

In order to obtain Mg alloys with f.ne microstructures and high mechanical perf.rmances,a novel f.iction-based processing method,name as“constrained f.iction processing(Cf.)”,was *** Cf.,def.ct-f.ee Mg-Zn-Ca rods with greatly ref.ned grains and high mechanical properties were *** to the previous as-cast microstructure,the grain size was reduced f.om more than 1 mm to around 4μm within 3 s by a single process *** compressive yield strength was increased by 350%while the ultimate compressive strength by 53%.According to the established material f.ow behaviors by“tracer material”,the plastic material was transported by shear *** the base material to the rod,the material experienced three stages,*** by the tool,upward f.ow with additional tilt,f.llowed by upward *** microstructural evolution was revealed by“stop-action”*** microstructural development at regions adjacent to the rod is mainly controlled by twinning,dynamic recrystallization(DRX)as well as particle stimulated nucleation,while that within the rod is related to DRX combined with grain growth.

关键词： Constrained f.iction processing Magnesium alloys Microstructure Mechanical properties Grain ref.nement Plastic def.rmation

f.ilure to Rescue as a Quality Metric in Congenital Heart Surgeries in a High-Complexity Service Provider Institution Located in a Middle-Income Country

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

Congenital Heart Disease 2024年第2期19卷 207-218页

作者： Gustavo Cruz Santiago Pedroza Juan f.Vélez Jessica Largo Juan f.Tejada Jorge H.Mejía-Mantilla Departamento de Anestesiología Fundación Valle del LiliCali760032Colombia Centro de Investigaciones Clínicas Fundación Valle del LiliCali760032Colombia Departamento de Cardiología Pediátrica Fundación Valle del LiliCali760032Colombia f.cultad de Medicina Universidad IcesiCali760031Colombia Unidad de Cuidado Intensivo Fundación Valle del LiliCali760032Colombia

Background:f.ilure to rescue has been an ef.ective quality metric in congenital heart ***,mor-bidity and mortality depend greatly on non-modif.able individual f.ctors and have a weak correlation with better-quality *** aim to measure the complications,mortality,and risk f.ctors in pediatric patients undergoing congenital heart surgery in a high-complexity institution located in a middle-income country and compare it with other institutions that have conducted a similar ***:A retrospective observational study was conducted in a high-complexity service provider institution,in Cali,*** pediatric patients undergoing any congenital heart surgery between 2019 and 2022 were *** main outcomes evaluated in the study were complication,mortality,and f.ilure to rescue *** and multivariate logistic regression analysis was perf.rmed with mortality as the outcome ***:We evaluated 308 congenital heart *** the outcomes,201(65%)complications occurred,23(7.5%)patients died,and the f.R of.the entire cohort was 11.4%.The presence of.a postoperative complication(OR 14.88,CI 3.06–268.37,p=0.009),age(OR 0.79,CI 0.57–0.96,p=0.068),and urgent/emergent surgery(OR 8.14,CI 2.97–28.66,pf.cant variables in predicting ***:f.ilure to rescue is an ef.ective and comparable quality measure in healthcare institutions and is the major contributor to postoperative mortality in congenital heart *** our higher mortality and complication rate,we obtained a comparable f.ilure to rescue rate to high-income countries’health institutions.

关键词： Congenital heart surgery complication mortality f.ilure to rescue quality metric

Niche dif.erentiation among f.cultative f.lter f.eders: Insights f.om invasive Ponto-Caspian mysids

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2024年第4期70卷 513-521页

作者： Péter Borza Varsha Rani Csaba f.Vada Institute of.Aquatic Ecology Centre for Ecological ResearchKarolina ut 29.1113 BudapestHungary Doctoral School of.Biology Institute of BiologyEotvos Lorand UniversityPazmany Péter sétany 1/C1117 BudapestHungary

The degree of.dietary specialization has a f.ndamental impact on the ecological f.nction and interactions of.suspension *** niche dif.erentiation by f.od particle size is common among obligate suspension f.eders,its role is not evident in f.cultative *** this study,we aimed at providing new insights on the matter by f.cusing on sympatric mysid *** mysids use dif.erent mechanisms f.r raptorial and f.lter-f.eding,they represent a more adequate model system than f.r example,the more extensively studied *** made morpholog-ical measurements on the 4 coexisting invasive Ponto-Caspian mysid species to determine the areas and mesh sizes of.their *** also quantif.ed their clearance rates on the microalga Cryptomonas *** a laboratory experiment to reveal how morphological dif.erences manif.st in their overall f.ltering *** f.und relatively small but consistent dif.erences in the primary f.lter area among the species,indicating that morphological constraints due to the enclosed position of.the setae might limit the possibility f.r *** primary f.lter mesh sizes were small in all 4 species(0.69-2.73μm)with moderate but consistent intraspecif.c dif.erences,suggesting that the benef.t of.being able to capture small particles might outweigh the pressure f.r *** observed clearance rates were in accordance with the morphological characteristics of.the species,highlighting that auxiliary f.lters(present in one of.the species,Limnomysis benedeni)are needed to increase f.ltering capacity *** study conf.rmed that f.od particle size can contribute to the niche dif.erentiation of.f.cultative f.lter f.eders,but also indicated that they can tolerate a higher overlap than obligate *** observed dif.erences were related to the habitat pref.rences and predatory potentials of.the species,suggesting that complementarity among the dif.erent niche axes might f.rther f.cilitate theircoexistence.

关键词： clearance rate coexistence f.lter area f.ltermesh size.

Tuning the optoelectronic properties f.r small organic compounds as organic solar cell applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics Letters 2024年第7期20卷 412-417页

作者： Hussein K.Mejbel Laf. f.Al-Badry Department of.Physics College of Education for Pure ScienceUniversity of Thi-QarNassiriya 64001Iraq Department of.Physics College of ScienceUniversity of Thi-QarNassiriya 64001Iraq1

Recently,organic solar cells have attracted the attention of.many researchers owing to f.exibility,low cost,light weight and large-area applications,and signif.cant improvement in the power conversion ef.iciency(PCE).In this work,we designed chains f.om organic compounds as donors and replaced the core unit in each series with a variety of.acceptors in order to enhance their optical and electronic characterization and perf.rmance f.r power conversion ef.iciencies in organic solar *** utilized density f.nctional theory(Df.)and time-dependent density f.nctional theory(TD-Df.)to investigate the geometry optimization by using the Gaussian 09 *** electronic and optical properties were determined,which involve the lowest unoccupied molecular orbital(LUMO)and the highest occupied molecular orbital(HOMO)levels,the band gap energy,maximum absorption wavelength(λ_(max)),open circuit voltage(V_(oc)),and light harvesting ef.iciency(LHE).Our evaluation denotes that the small compounds suggested are predicted to exhibit the best perf.rmance compared to the f.rst series(SC1),like a lower band gap energy,a lower HOMO energy level,a greater absorption range,and a larger PCE.

关键词： orbital occupied compounds