检索结果-南通市图书馆

Active Queue Management Exploiting the Rate Information in TCP-IP Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2018年第1期5卷 223-231页

作者： Abderrahmane Boudi malik Loudini Laboratoire de la Communication dans les Systemes Informatiques Ecole nationale Superieure d'Informatique ESI Algiers 16309 Algeria IEEE

In this paper, we propose a new mechanism called explicit rate notification(ERN) to be used in end-to-end communications. The ERN scheme encodes in the header of transmission control protocol(TCP) packets information about the sending rate and the round trip time(RTT) of the flows. This new available information to the intermediate nodes(routers) is used to improve fairness, increase utilization, decrease the number of drops, and minimize queueing delays. Thus, it induces a better management of the queue. A comparison of our scheme with preexistent schemes, like the explicit congestion notification scheme, shows the effectiveness of the proposed mechanism.

关键词： Active queue management congestion control fairness transmission control protocol(TCP)

阴阳理论之前的“阴”和“阳”——以郭店简、清华简相关文献为例

在线全文

学校读者我要写书评

暂无评论

出土文献 2024年第2期 155-167,174页

作者：艾兰陈鹏宇(译) 达特茅斯学院故宫博物院器物部

学界一般认为,阴阳二元理论直到公元前3世纪才出现。郭店一号墓竹简和清华简的埋藏年代都在公元前300年左右,可以作为验证这一观点的理想材料。本文考察了这些文献中“阴”和“阳”的含义,认为这些例证或用本义,或直接表示自然形象,或... 详细信息

学界一般认为,阴阳二元理论直到公元前3世纪才出现。郭店一号墓竹简和清华简的埋藏年代都在公元前300年左右,可以作为验证这一观点的理想材料。本文考察了这些文献中“阴”和“阳”的含义,认为这些例证或用本义,或直接表示自然形象,或表示相关隐喻。由此证明,在公元前3世纪之前,“阴”和“阳”并不表示二元理论。本文还注意到,这些材料中,阴、阳对自然形象的隐喻决定了后世理论的发展轨迹,在这些隐喻的基础上互补的二元论体系得以形成。

关键词：阴阳气郭店楚简清华简

Pulsed Corona Discharges and Their Applications in Toxic VOCs Abatement

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 1999年第4期7卷 351-362页

作者： Muhammad Arif malik Salman Akbar malik Applied Chemistry Division PINSTECHPO NiloreIslamabadPakistanDepartment of Biological SciencesQuaid-i-Azam UniversityIslamabadPakistan

Plasma processes are among the emerging technologies for volatile organic compounds (VOCs) abatement[1]. Both thermal plasmas and non-equilibrium plasmas (cold plasmas) are being developed for VOCs cleanup[2,3]. Particularly, pulsed corona discharges offer several advantages over conventional VOCs abatement techniques[4-7]. To optimize the existing technology and to develop it further, there is need to understand the mechanisms involved in plasma chemical reactions. Furthermore, it is strongly desirable to be able to predict the behavior of new VOCs in non-equilibrium plasma environment from the data known for a few representative compounds. Pulsed corona discharge technique is introduced here with citation of relevant literature. Fundamental principles, useful for predicting the VOCs' decomposition behavior, have been worked out from the published literature. Latest developments in the area, targeted to minimize the energy losses, improve the VOCs destruction efficiency and reduce the generation of unwanted organic and inorganic by-products, are presented.

关键词： corona discharges volatile organic compounds air purification water purification nonequilibrium plasma

A chromosome-scale genome assembly of Rauvolfia tetraphylla facilitates identification of the complete ajmaline biosynthetic pathway

在线全文

学校读者我要写书评

暂无评论

Plant Communications 2024年第4期5卷 129-132页

作者： Enzo Lezin Ines Carqueijeiro Clement Cuello Mickael Durand Hans JJansen Valentin Verges Caroline Birer Williams Audrey Oudin Thomas Duge de Bernonville Julien Petrignet Noemie Celton Benoit St-Pierre Nicolas Papon Chao Sun Ron P.Dirks sarah Ellen O’Connor Michael Krogh Jensen Sebastien Besseau Vincent Courdavault Biomole´cules et Biotechnologies Vegetales EA2106Universite´de Tours37200 ToursFrance Future Genomics Technologies 2333 BE Leidenthe Netherlands Laboratoire Synthe se et Isolement de Molecules BioActives(SIMBA EA 7502)Universitede Tours37200 ToursFrance Laboratoire de Cytoge´netique Constitutionnelle CHRU de Tours-Hopital Bretonneau37044 ToursFrance University Angers University BrestIRFSFR ICAT49000 AngersFrance Institute of Medicinal Plant Development Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 2800China Department of Natural Product Biosynthesis Max Planck Institute for Chemical Ecology07745 JenaGermany Novo Nordisk Foundation Center for Biosustainability Technical University of Denmark100193 Kgs LyngbyDenmark Present address:Limagrain Center de RechercheRoute d’EnnezatChappesFrance These authors contributed equally to this article

Dear Editor,Rauvolfia tetraphylla(aka the Devil pepper)(Supplemental Figure 1)is a well-known medicinal plant that produces monoterpenoid indole alkaloids(MIAs).This MIA biosynthesis occurs in several organs,including leaves,stems,fruit,and roots,which accumulate the famous antiarrhythmic ajmaline(Kumar et al.2016a,2016b;Kumara et al.,2019).MIAs are natural products notably involved in plant adaptation to the environment and defense against *** mainly results from their high biological activities,which also explain their pharmacological properties.

关键词： properties. Figure roots

Microsurgical management of radicular cyst using guided tissue regeneration technique:A case report

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 Clinical Cases 2024年第7期12卷 1346-1355页

作者： Juan Carlos Gómez Mireles Eugenia Karina Martínez Carrillo Katia Alcalá Barbosa Evangelina Gutiérrez Cortés Javier González Ramos Luis Antonio González Gómez Rubén Alberto Bayardo González sarah Monserrat Lomelí Martínez Periodontics Specialty Department of Integral Dentistry ClinicsCentro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico Endodontics Specialty Department of Integral Dentistry ClinicsCentro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico Endodontics Specialty Department of ClinicsCentro Universitario de Los AltosUniversidad de GuadalajaraTepatitlán de Morelos 47620Mexico Specialty in Oral Pathology Surgical-Stomatological DepartmentAutonomous University of GuadalajaraZapopan 45129Mexico Independent Researcher Guadalajara 44340Mexico Department of Integral Dentistry Clinics Centro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico Department of Medical and Life Sciences Centro Universitario de la CiénegaUniversidad de GuadalajaraOcotlán 47810Mexico Master of Public Health Department of Well-being and Sustainable DevelopmentCentro Universitario del NorteUniversidad de GuadalajaraColotlán 46200Mexico

BACKGROUND Radicular cyst is a lesion of odontogenic origin that arises from epithelial remains due to periapical periodontitis caused by inflammatory reactions generated at the apex of affected teeth with infected or necrotic *** therapeutic mana gement of radicular cysts is *** is only one case report of enucleation of a radicular cyst managed with microsurgery and apicoectomy,but without the use of the guided tissue regeneration(GTR)technique in the same surgical *** present clinical case describes the management of a radicular cyst with microsurgical approach,performance of an apicoectomy of the tooth associated with the entity,application of GTR technique,use of a resorbable membrane of type I bovine collagen,and bovine *** SUMMARY A 68-year-old patient presented with a radicular cyst from an upper lateral *** microsurgical management used was aimed at enucleating the chemical membrane,performing apicoectomy of the tooth along with careful and precise retrograde filling,and implementing GTR technique using a resorbable collagen membrane and bovine *** diagnosis of radicular cyst was confirmed using histopathological *** patient underwent follow-up evaluations at 10 and 30 d *** 4 months postoperative evaluation,she remained asymptomatic,and radiographs showed significant periapical healing with adequate bone *** These results suggest that microsurgical management using the GTR technique with collagen membrane and xenograft,contributes to bone regeneration.

关键词： Odontogenic cysts Apical periodontal cyst Dental root end cyst Case report

Iron and Heart Failure: Current Concepts and Emerging Pharmacological Paradigms

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 Cardiovascular Diseases 2024年第4期14卷 195-216页

作者： Maria Rosaria De Pascale Maria Beatrice Rondinelli Flora Ascione Vincenzo Maffei Chiara Di Lorenzo sarah Scagliarini Raffaella Faraonio Antonio Faiella Immunohematology and Transfusion Medicine Unit Cardarelli Hospital Naples Italy Immunohematology and Transfusion Medicine Unit San Camillo-Forlanini Hospital Rome Italy Health Management Office Cardarelli Hospital Naples Italy Anesthesiology Unit Cardarelli Hospital Naples Italy Department of Medical and Translational Sciences University of Naples Federico II Naples Italy Oncology Unit Cardarelli Hospital Naples Italy Department of Molecular Medicine and Medical Biotechnologies University of Naples Federico II Naples Italy

Background: Emerging evidence has recognized that anemia and iron deficiency are recurrent comorbidities in chronic heart failure (HF) and several trials have established that iron administration improves myocardial asset and clinical scenario in HF. Purpose: Recent acquisitions suggest that iron deficiency represents a concrete bias in the pathogenetic mechanism of chronic HF, so we have investigated the putative role of the hepcidin/ferroportin axis in the cardiovascular setting to advocate novel pharmacological and clinical approaches. Methods: Here, after an excursus on iron metabolism, we first reviewed the ongoing studies on novel iron targeted compounds. Then, we summarize large clinical interventional studies conducted on patient suffering from iron deficiency and HF which have tested the effects of drugging iron regard QoL, hospitalizations and cardiovascular death. Results: Novel compounds such as hepcidin agonist (PTG 300), synthetic human hepcidin (LJPC-401) and anti FPN (Vamifeport) are ongoing in iron overloaded patients, while the hepcidin blocker (PRS-080) is under investigation in anemic patients. Noteworthy, novel insights could arise from the results of a Phase IV interventional study regarding the modification of hepcidin pathway in a large cohort of HF patients (n = 1992) by sodium glucose cotransporter 2 inhibitors. To date, several studies highlight the beneficial effect of iron administration in cardiovascular setting and latest evidences consider hepcidin level as a novel biomarker of cardiac injury and atherosclerosis. Conclusions: We advocate that data from ongoing studies will suggest novel iron targeted therapies for diagnosis, prognosis and therapy transferable in selected heart failed patients.

关键词： Heart Failure Iron Anemia Iron Deficiency Hepcidin

Modelling of electronegative collisional warm plasma for plasma-surface interaction 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

Plasma Science and Technology 2021年第4期23卷 48-54页

作者： Rajat DHAWAN Hitendra K malik Plasma Science and Technology Laboratory Department of PhysicsIndian Institute of Technology DelhiNew Delhi—110016India

An electronegative collisional plasma having warm and massive positive ions,non-extensive distributed electrons and Boltzmann distributed negative ions is modelled for the plasma-surface interaction process that is used for the surface *** the sheath formation is evaluated through the Bohm’s criterion,which is found to be modified,and the variation of the sheath thickness and profiles of the density of plasma species and the net space charge density in the sheath region in addition to the electric *** effect of ion temperature,nonextensivity and collisional parameter is examined in greater detail considering the collisional cross-section to obey power-law dependency on the positive ion *** positive ions are found to enter in the sheath region at lower velocities in the collisional plasma compared to the case of collision-less plasma;this velocity sees minuscule reduction with increasing *** increasing ion temperature and collisional parameter lead to the formation of sheath with smaller thickness.

关键词： electronegative sheath ion temperature non-extensivity sheath thickness power-law dependency collisions

Critical Technical Awakenings

在线全文

学校读者我要写书评

暂无评论

Journal of Social Computing 2021年第4期2卷 365-384页

作者： Maya malik Momin M.malik the School of Social Work McGill UniversityMontréalH3A 0G4Canada the Institute in Critical Quantitative Computational&Mixed MethodologiesJohns Hopkins UniversityBaltimoreMD 21218USA

Starting with Philip ***’s 1997 essay on“critical technical practice”,we consider examples of writings from computer science where authors describe“waking up”from a previously narrow technical approach to the world,enabling them to recognize how their previous efforts towards social change had been *** use these examples first to talk about the underlying assumptions of a technology-centric approach to social problems,and second to theorize these awakenings in terms of Paulo Freire’s idea of critical ***,understanding these awakenings among technical practitioners as examples of this more general phenomenon gives guidance for how we might encourage and guide critical awakenings in order to get more technologists working effectively towards positive social change.

关键词： critical technical practice critical consciousness perspective transformation education machine learning

Closed-Form Expression for the Exact Period of a Nonlinear Oscillator Typified by a Mass Attached to a Stretched Wire

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Applied Mathematics and Mechanics 2011年第6期3卷 689-701页

作者： malik Mamode Department of Physics Laboratoire PIMENTEquipe MASCUniversity of La Reunion97400 Saint-DenisFrance

The exact analytical expression of the period of a conservative nonlinear oscillator with a non-polynomial potential,is *** an oscillatory system corresponds to the transverse vibration of a particle attached to the center of a stretched elastic *** result is given in terms of elliptic functions and validates the approximate formulae derived from various approximation procedures as the harmonic balance method and the rational harmonic balance method usually implemented for solving such a nonlinear problem.

关键词： Nonlinear oscillator exact period elliptic integral