检索结果-南通市图书馆

Thermal Performance Prediction in the Air Gap of a Rotor-Stator Configuration: Effects of Numerical Models

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 Thermal Science 2020年第1期29卷 206-218页

作者： DANG dinh-Dong pham Xuan-Tan NGUYEN Chi-Cong Department of Mechanical Engineering École de technologie supérieureMontrealQCCanada Hydro-Québec’s research institute VarennesQCCanada

This study is dedicated to a numerical investigation of convective heat transfer on the rotor surfaces of a rotor-stator configuration that is typically found in large *** computational fluid dynamics calculations with two turbulence modelling approaches are used to predict the flow structure and heat transfer in the air gap of the rotor-stator *** steady state mixing plane approach is employed at the interface to couple the rotor and stator *** show that the location of mixing plane interface in the air gap plays an important role in the prediction of heat transfer on the pole ***,it is indicated that the prediction of temperature distribution on the pole face is greatly affected by the turbulence models ***,through a comparison between the pure convective and conjugate heat transfer methodologies,it is shown that the inclusion of solid domain into the numerical model significantly improves the thermal prediction of the solid components of the machine.

关键词： hydro-generators electrical cooling mixing plane windage loss conjugate heat transfer

Taxonomic notes on some spider species (Arachnida:Araneae) from China and Vietnam

在线全文

学校读者我要写书评

暂无评论

Zoological Systematics 2023年第1期48卷 1-99页

作者： Yejie Lin Shuqiang Li dinh-Sac pham Institute of Zoology Chinese Academy of SciencesBeijing 100101China Vietnam National Museum of Nature(VNMN) Vietnam Academy of Science and Technology(VAST)18 Hoang Quoc VietCau Giay

Three new genera of spiders are described:Jishiyu Lin&Li,***.,of Agelenidae ***,1837,with *** Lin&Li,***.(♂,China:Yunnan)as the type species,Marusik Lin&Li,***.,of Gnaphosidae Banks,1892,with *** Lin&Li,***.(♂,Vietnam)as the type species and Xiaoliguang Lin&Li,***.,of Phrurolithidae Banks,1892,with *** Lin&Li,***.(♂♀,Vietnam)as the type ***-five new species are described in 12 families:Corinnidae Karsch,1880:Spinirta qishuoi Lin&Li,***.(♀,China:Guangxi);Hahniidae Bertkau,1878:Cicurina miniae Lin&Li,***.(♀,Vietnam);Halonoproctidae Pocock,1901:Latouchia wenruni Lin&Li,***.(♂♀,China:Hainan);Liocranidae Simon,1897:Oedignatha wuyong Lin&Li,***.(♂♀,Vietnam)and Sphingius gongsunsheng Lin&Li,***.(♀,Vietnam);Nemesiidae Simon,1889:Sinopesa guansheng Lin&Li,***.(♂,China:Yunnan);Phrurolithidae Banks,1892:Edelithus huyanzhuo Lin&Li,***.(♂♀,Vietnam),*** Lin&Li,***.(♂♀,Vietnam),*** Lin&Li,***.(♂♀,Vietnam),Grandilithus linglingae Lin&Li,***.(♂♀,Vietnam),*** Lin&Li,***.(♀,Vietnam),Lingulatus chaijin Lin&Li,***.(♀,Vietnam),*** Lin&Li,***.(♂♀,Vietnam),*** Lin&Li,***.(♂♀,Vietnam),*** Lin&Li,***.(♂♀,Vietnam),*** Lin&Li,***.(♂♀,Vietnam),*** Lin&Li,***.(♂♀,Vietnam),*** Lin&Li,***.(♂♀,Vietnam),Otacilia liuxinyei Lin&Li,***.(♂♀,Vietnam),*** Lin&Li,***.(♂,Vietnam)and *** Lin&Li,***.(♀,Vietnam);Pimoidae Wunderlich,1986:Pimoa zeluni Lin&Li,***.(♂,China:Hebei);Salticidae Blackwall,1841:Epeus covid Lin&Li,***.(♂♀,China:Yunnan);Theridiidae Sundevall,1833:Phoroncidia minlangi Lin&Li,***.(♀,China:Fujian);Thomisidae Sundevall,1833:Borboropactus nanda Lin&Li,***.(♂♀,China:Yunnan),Cozyptila haocongi Lin&Li,***.(♂♀,Vietnam),Lysiteles huyilinae Lin&Li,***.(♂♀,Vietnam),Massuria daizong Lin&Li,***.(♂♀,China:Yunnan)and Zametopina wanliae Lin&Li,***.(♂,Vietnam);Trachelidae Simon,1897:Utivarachna yu

关键词： Asia diagnosis families taxonomy types

Novel Criteria for Exponential Stability of Linear Non-Autonomous Functional Differential Equations

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2019年第2期32卷 479-495页

作者： pham HUU ANH Ngoc THAI BAO Tran CAO THANH Tinh NGUYEN dinh Huy Department of Mathematics Vietnam National University-HCMC International University Faculty of Information Systems Vietnam National University-HCMC University of Information Technology Department of Mathematics Vietnam National University-HCMC University of Information Technology Division of Applied Mathematics Faculty of Applied Sciences Vietnam National University-HCMC Ho Chi Minh city University of Technology

General linear non-autonomous functional differential equations are considered. Explicit criteria for exponential stability are given. Furthermore, the authors present an explicit robust stability bound for systems su... 详细信息

关键词： Exponential stability linear functional differential equations perturbation

First Records of Megophrys daweimontis Rao and Yang, 1997 and Amolops vitreus(Bain, Stuart and Orlov, 2006)(Anura: Megophryidae, Ranidae) from Vietnam

在线全文

学校读者我要写书评

暂无评论

Asian Herpetological Research 2015年第1期6卷 66-72页

作者： dzung Trung LE Anh Van pham Son Hung Lan NGUYEN Thomas ZIEGLER Truong Quang NGUYEN Faculty of Biology Hanoi National University of Education Faculty of Biology and Chemistry Tay Bac University AG Zoologischer Garten Kln Institute of Ecology and Biological Resources Vietnam Academy of Science and Technology

Two amphibian species,Megophrys daweimontisandAmolops vitreus,are recorded for the ifrst time from Vietnam, on the basis of a new amphibian collection from Dien Bien and Son La provinces. In addition, acoustic analysis ofA. vitreus is also provided based on the advertisement calls recorded in Muong Nhe Nature Reserve of Dien Bien Province, Vietnam.

关键词： Amolops vitreus Megophrys daweimontis new records advertisement call Dien Bien Province Son La Province

Magnetic Force Enhanced Sustainability and Power of Cam-Based Triboelectric Nanogenerator

在线全文

学校读者我要写书评

暂无评论

Research 2021年第1期2021卷 370-380页

作者： Hakjeong Kim Hee Jae Hwang Nghia dinh Huynh Khanh Duy pham Kyungwho Choi Dahoon Ahn Dukhyun Choi Department of Mechanical Engineering(Integrated Engineering Program) Kyung Hee UniversityYongin 17104Republic of Korea Department of Mechanical Engineering Korea Aerospace UniversityGoyang 10540Republic of Korea Division of Mechanical Engineering Kongju National UniversityCheonan 31080Republic of Korea

Since the first invention of triboelectric nanogenerators(TENGs)in 2012,many mechanical systems have been applied to operate TENGs,but mechanical contact losses such as friction and noise are still big obstacles for improving their output performance and ***,we report on a magnet-assembled cam-based TENG(MC-TENG),which has enhanced output power and sustainability by utilizing the non-contact repulsive force between the *** investigate the theoretical and experimental dynamic behaviors of MC-TENGs according to the effects of the contact modes,contact and separation times,and contact forces(i.e.,pushing and repulsive forces).We suggest an optimized arrangement of magnets for the highest output performance,in which the charging time of the capacitor was 2.59 times faster than in a mechanical cam-based TENG(C-TENG).Finally,we design and demonstrate a MC-TENG-based windmill system to effectively harvest low-speed wind energy,~4 m/s,which produces very low ***,it is expected that our frictionless MC-TENG system will provide a sustainable solution for effectively harvesting a broadband of wasted mechanical energies.

关键词： friction magnets generator

A Novel Incremental Attribute Reduction Algorithm Based on Intuitionistic Fuzzy Partition Distance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第12期47卷 2971-2988页

作者： pham Viet Anh Nguyen Ngoc Thuy Nguyen Long Giang pham dinh Khanh Nguyen The Thuy Graduate University of Science and Technology Vietnam Academy of Science and TechnologyHanoi100000Vietnam Institute of Information Technology Vietnam Academy of Science and TechnologyHanoi100000Vietnam HaUI Institute of Technology Hanoi University of IndustryHanoi100000Vietnam Faculty of Information Technology University of SciencesHue UniversityHue530000Vietnam AI Research Department Neurond Technology JSCHanoi100000Vietnam Information and Communication Technology Center Department of Information and CommunicationsBacninh790000Vietnam

Attribute reduction,also known as feature selection,for decision information systems is one of the most pivotal issues in machine learning and data *** based on the rough set theory and some extensions were proved to be efficient for dealing with the problemof attribute ***,the intuitionistic fuzzy sets based methods have not received much interest,while these methods are well-known as a very powerful approach to noisy decision tables,i.e.,data tables with the low initial classification ***,this paper provides a novel incremental attribute reductionmethod to dealmore effectivelywith noisy decision tables,especially for highdimensional *** particular,we define a new reduct and then design an original attribute reduction method based on the distance measure between two intuitionistic fuzzy *** should be noted that the intuitionistic fuzzypartitiondistance iswell-knownas aneffectivemeasure todetermine important *** interestingly,an incremental formula is also developed to quickly compute the intuitionistic fuzzy partition distance in case when the decision table increases in the number of *** formula is then applied to construct an incremental attribute reduction algorithm for handling such dynamic ***,some experiments are conducted on real datasets to show that our method is far superior to the fuzzy rough set based methods in terms of the size of reduct and the classification accuracy.

关键词： Incremental attribute reduction intuitionistic fuzzy sets partition distance measure dynamic decision tables

Micro Transportation Systems: 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

Modern Mechanical Engineering 2011年第2期1卷 31-37页

作者： Phuc Hong pham dzung Viet Dao 不详

This paper summarized and reviewed recent studies of micro transportation systems (MTS) in the MEMS (Micro Electro-Mechanical System) field. Micro transportation systems can be identified and classified into three categories based on the contact types between the objects and the actuators (i.e. liquid-based, solid- based and air-bearing type). Their advantages and disadvantages were also analyzed and compared. The au- thors have proposed and developed three types of solid-based MTS utilizing electrostatic comb-drive actua- tors and ratchet mechanisms to drive the micro container in straight and curved paths. These MTSs have been fabricated with silicon-on-insulator (SOI)-MEMS technology and tested successfully. In the near future, MTSs can be applied in different fields such as medicine (to classify and test blood cells), in bioengineering (to capture, sort and combine bio-cells, DNA), or in micro robot systems.

关键词： Micro Transportation System (MTS) Electrostatic Comb-Drive Actuator (ECA)

WJSC 6^(th) Anniversary Special Issues(2):Mesenchymal stem cells Mesenchymal stem cells in the treatment of spinal cord injuries: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 Stem Cells 2014年第2期6卷 120-133页

作者： Venkata Ramesh Dasari Krishna Kumar Veeravalli dzung H dinh Department of Cancer Biology and Pharmacology University of Illinois College of Medicine at Peoria Department of Neurosurgery and Illinois Neurological Institute University of Illinois College of Medicine at Peoria

With technological advances in basic research,the intricate mechanism of secondary delayed spinal cord injury(SCI)continues to unravel at a rapid ***,despite our deeper understanding of the molecular changes occurring after initial insult to the spinal cord,the cure for paralysis remains *** treatment of SCI is limited to early administration of high dose steroids to mitigate the harmful effect of cord edema that occurs after SCI and to reduce the cascade of secondary delayed SCI.R ecent evident-based clinical studies have cast doubt on the clinical benefit of steroids in SCI and intense focus on stem cell-based therapy has yielded some encouraging *** array of mesenchymal stem cells(MSCs)from various sources with novel and promising strategies are being developed to improve function after *** this review,we briefly discuss the pathophysiology of spinal cord injuries and characteristics and the potential sources of MSCs that can be used in the treatment of *** will discuss the progress of MSCs application in research,focusing on the neuroprotective properties of ***,we will discuss the results from preclinical and clinical trials involving stem cell-based therapy in SCI.

关键词： Spinal cord injury Mesenchymal stem cells Bone marrow stromal cells Umbilical cord derived mesenchymal stem cells Adipose tissue derived mesenchymal stem cells

Annealing Effect on the Ionic Conductivity of La0.6-.xLi3xTiO3 Made by Double Mechanical Alloying Method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料科学与工程（中英文B版） 2014年第4期4卷 86-94页

作者： Le dinh Trong Nguyen Nang dinh pham Duy Long Faculty of Physics Hanoi Pedagogical University No.2 Xuan Hoa Phuc Yen Vinh Phue Vietnam Faculty of Engineering Physics & Nanotechnology University of Engineering and Technology Hanoi Vietnam National University 144 Xuan Thuy str. Cau -Giay Dist. Hanoi 1000 Vietnam Institute of Materials Science Vietnam Academy of Science and Technology 18 Hoang-Quoc-Viet str. Cau -Giay Dist. Hanoi Vietnam