检索结果-南通市图书馆

Numerical study of convective heat transfer in static arrangements of particles with arbitrary shapes:A monolithic hybrid lattice Boltzmann-finite difference-phase field solver

引用

Particuology 2024年第2期85卷 186-197页

作者： reza Namdar Mohammadhassan Khodsiani Hesameddin safari Tanya Neeraj Seyed Ali Hosseini Frank Beyrau Benoit Fond Dominique Thevenin Fathollah Varnik Interdisciplinary Centre for Advanced Materials Simulation(ICAMS) Ruhr-University BochumBochum44801Germany Laboratory of Technical Thermodynamics University of Magdeburg"Otto von Guericke"Magdeburg39106Germany Laboratory of Fluid Dynamics and Technical Flows University of Magdeburg"Otto von Guericke"MagdeburgD-39106Germany Department of Mechanical and Process Engineering ETH ZurichZurich8092Switzerland ONERA The French Aerospace Lab Department of AerodynamicsAeroelasticity and Acoustics(DAAA)Paris-Saclay UniversityMeudon92190France

A compressible lattice Boltzmann-finite difference method is extended by the phase-field approach into a monolithic scheme to study fluid flow and heat transfer through regular arrangements of solid bodies of circular,elliptical and irregular shapes.The advantage of using the phase-field method is demon-strated both in its simplicity of accounting for flow and thermal boundary conditions at solid surfaces with irregular shapes and in the capability of generating such complex-shaped objects.For an array of discs,numerical results for the overall solid-to-gas heat transfer rate are validated via experiments on flow through arrays of hot cylinders.The thus validated compressible LB-FD-PF hybrid scheme is used to study the dependence of heat transfer on flow and thermal boundary conditions(Reynolds number,temperature difference between the hot solid bodies and the inlet gas),porosity as well as on the shape of solid objects.Results are rationalized in terms of the residence time of the gas close to the solid body and downstream variations of gas velocity and temperature.Perspective for further applications of the proposed methodology are also discussed.

关键词： Lattice Boltzmann method Finite difference scheme Convective heat transfer Diffuse interface Thermal compressible flow

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of methane content and the oscillating electric field between electrodes on atmospheric Ar/methane plasma jet and DLC coating deposition

引用

Plasma Science and Technology 2020年第8期22卷 76-89页

作者： reza safari Farshad SOHBATZADEH Department of Atomic and Molecular Physics Faculty of Basic SciencesUniversity of MazandaranBabolsar 47416Iran

In this work,the effects of the methane gas flow and the internal oscillating electric field between electrodes on radio-frequency(RF)atmospheric pressure argon/methane plasma jet and process of diamond-like carbon(DLC)film deposition have been investigated.Properties of RF atmospheric Ar/methane plasma jet such as active species density,length,electron temperature,appearance and ionization process of argon/methane plasma jet are changed due to the changing of methane flow content and electric field vector and its gradient.With increasing methane flow,the formation of C2 hydrocarbon and CH band content is decreased because injected electrical energy to a mixture of Ar/methane gases is insufficient to stabilize the ionization process of methane gas and the electrical-chemical reaction rate is decreased.With shortening the gas gap between two electrodes,electric field strength and its gradient are increased leading to more energy injection to the electron.Electrical-chemical reactions are strengthened leading to increasing the CH band content.These phenomena introduce the Ar/methane plasma jet in different modes causing to deposit the DLC film with different structures and properties.With using quartz glass and alumina ceramic as dielectric barriers tubes,RF atmospheric pressure Ar/methane plasma jet has been used to deposit DLC coating in different modes.Increasing methane content and shortening the gas gap leads to decreasing sp3 bonded content and the quality of the deposited film.

关键词： RF atmospheric plasma methane flow electric field

来源：

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

Local Energy Dissipation/Transition in Field Effect Molecular Nanoelectronic Systems:a Quantum Mechanical Methodology

引用

Communications in Theoretical Physics 2019年第4期71卷 441-454页

作者： reza safari Hassan Sabzyan Department of Chemistry Faculty of Science University of Qom Department of Chemistry University of Isfahan

Electronic and vibrational intra-molecular thermoelectric-like ?gures of merit(ZT_γ~M) are introduced for single molecule nanoelectronic system, using quantum theory of atoms in molecule. These ?gures of merit are used to describe intra-molecular or local energy dissipation/transition(as in Joule-like, Peltier-like, and Thomson-like effects) in?eld effect molecular devices. The ZT_γ~M?gures of merit are computed for two proposed molecular devices. Analysis of the results shows that ZT_γ~Mdepends almost non-linearly on the electric ?eld(EF) strength. Also, the intra-molecular Joule-like heating plays a dominant role in the local energy dissipation, and intra-molecular Thomson-like heating is generally larger than the intra-molecular Peltier-like heating. Introduction of ZT_γ~Mcan be applied to extend the analysis of thermoelectric heating down to molecular and intra-molecular levels, and thus can be used to predict characteristics and performance of any candidate multi-terminal or multi-pole molecular systems prior to their application in real nanoelectronic circuits.

关键词： intra-molecularheattransfer local energy dissipation fieldeffect molecular device nanoelectronic devices QTAIM

来源：

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

Bio-ecology of malaria vectors in an endemic area,Southeast of Iran

引用

Asian Pacific Journal of Tropical Medicine 2016年第1期9卷 29-35页

作者： Masoud Yeryan Hamid Rreza Basseri Ahamd Ali Hanafi-Bojd Ahmad Raeisi Hamideh Edalat reza safari Minab District Health Center Department of Medical Entomology & Vector Control School of Public HealthTehran University of Medical Sciences National Malaria Elimination Program Manager CDCMOH & ME Deputy of Health Hormozgan University of Medical Sciences

Objective:To determine some bio-ecological aspects of malaria vectors in Jask County,where is targeted for malaria elimination in the national program.Methods:Mosquitoes were collected monthly during 2013-2014 using different collection methods.Subsequently,ELISA test was used to detect the human blood index of mosquitoes.The susceptibility status of Anopheles stephensi was evaluated against the diagnostic dosages of seven WHO recommended insecticides.Results:A total of 3 650 female and 4 736 Anopheles larvae were collected including Anopheles stephensi,Anopheles culicifacies s.l.,Anopheles dthali.Anopheles fluviatilis s.l.,Anopheles moghulensis and Anopheles turkhodi species.Anopheles stephensi was the dominant collected species on human baits and indoors with high rate of unfed and gravid specimens in internal and external window traps.Human blood index was calculated as 14.3%for this species.It was also found to be resistant to DDT and Dieldrin.Conclusions:The collected species had a wide range of habitats,and resting behaviors.With regarding to the presence of most important malaria vectors in Jask.control of the disease may be so complicated;as based on the weather condition it can be transmitted during the whole year,except for cold months.With this strong potential of transmission,existing population movements in the area may lead to imported cases of malaria and local outbreak(s).So,more specific studies on malaria vectors in high risk areas of Jask County are recommended.

关键词： Malaria Ecology Anopheles stephensi Insecticide resistance Southern Iran

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Environmental characteristics of anopheline mosquito larval habitats in a malaria endemic area in Iran

引用

Asian Pacific Journal of Tropical Medicine 2013年第7期6卷 510-515页

作者： Moussa Soleimani-Ahmadi Hassan Vatandoost Ahmad-Ali Hanafi-Bojd Mehdi Zare reza safari Abdolrasul Mojahedi Fatemeh Poorahmad-Garbandi Department of Medical Entomology and Vector Control.School of Public Health Hormozgan University of Medical Sciences.Bandar Abbas.Iran Infectious Diseases Research Center Hormozgan University of Medical Sciences.Bandar AbbasIran Department of Medical Entomology and Vector Control School of Public Health & National Institute of Health ResearchTehran University of Medical SciencesTehranIran Department of Occupational Health Engineering School of Public HealthHormozgan University of Medical SciencesBandar AbbasIran Hormozgan Health Center Hormozgan University of Medical SciencesBandar AbbasIran

Objective:To determine the effects of environmental parameters of lanal habitats on distribution and abundance of anopheline mosquitoes in Rudan county of Iran.Methods:This cross-sectional study was conducted during the mosquito breeding season from February 2010 to October 2011. The anopheline larvae were collected using the standard dipping method,the specimens were identified using a morphological-based key.Simultaneously with larvay collection,environmental parameters of the larval habitats including water current and turbidity,sunlight situation,and substrate type of habitats were recorded.Water samples were taken from breeding sites during lanal collection.Before collection of samples,the water temperature was measured.The water samples were analysed for turbidity,conductivity,total alkalinity,total dissolved solid.pH and ions including chloride,sulphate,calcium,and magnesium.Statistical correlation analysis and ANOVA test were used to analyze the association between environmental parameters and larval mosquito abundance.Results:In total 2 973 lanae of the genus Anopheles were collected from 25 larval habitats and identified using morphological characters.They comprised of six species: An.dthali(53.21%),An.stephensi(24.22%),An.culicifacies(14.06%),An.superpictus(4.07%),An. turkhudi(3.30%),and An.apoci(1.14%).The most abundant species was An.dthali which were collected from all of the study areas.Larvae of two malaria vectors.An.dthali and An.stephensi, co-existed and collected in a wide range of habitats with different physico-chemical parameters. The most common larval habitats were man-made sites such as sand mining pools with clean and still water.The anopheline mosquitoes also preferred permanent habitats in sunlight with sandy substrates.The results indicated that there was a significant relationship between mean physicochemical parameters such as water temperature,conductivity,total alkalinity,sulphate,chloride, and mosquito distribution and abundance.Conclusions:The results of this study showed a cor

关键词： Anopheles Larval habitats Malaria Rudan Iran

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Site Selectivity of One Hydroxyl Group Bonded on the Surface of Finite (5, 0) Zigzag Carbon Nanotube

引用

Computational Chemistry 2017年第1期5卷 1-8页

作者： Afshin Abbasi Hossein Mostaanzadeh reza safari Ebrahim Honarmand Department of Chemistry University of Qom Qom Iran

We have investigated the stability, geometrical structure, electronic properties and vibrational spectra of different isomers of hydroxylate (5, 0) zigzag carbon nanotube (CNT) with 60 C atoms and 10 hydrogen (C60H10) by using all-electron density-functional-theory (DFT) methods. Stable arrangements of these molecules were found by means of full geometry optimizations using B3LYP/6-31G(d) level of theory. From symmetrical point of view, four isomers of HO-C60H10 are possible when -OH bonds to the surface. We observed that the molecular properties strongly depend on the position of bonded hydroxyl group on the surface of CNT.

关键词： Carbon Nanotube DFT Calculations Hydroxyl Group Site Selectivity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applications of stem cells in orthodontics and dentofacial orthopedics:Current trends and future perspectives

引用

World Journal of Stem Cells 2018年第6期10卷 66-77页

作者： Shiva safari Arezoo Mahdian Saeed reza Motamedian Department of Orthodontics School of Dentistry Shahid Beheshti University of Medical Sciences

A simple overview of daily orthodontic practice involves use of brackets, wires and elastomeric modules. However, investigating the underlying effect of orthodontic forces shows various molecular and cellular changes. Also, orthodontics is in close relation with dentofacial orthopedics which involves bone regeneration. In this review current and future applications of stem cells(SCs) in orthodontics and dentofacial orthopedics have been discussed. For craniofacial anomalies, SCs have been applied to regenerate hard tissue(such as treatment of alveolar cleft) and soft tissue(such as treatment of hemifacial macrosomia). Several attempts have been done to reconstruct impaired temporomandibular joint. Also, SCs with or without bone scaffolds and growth factors have been used to regenerate bone following distraction osteogenesis of mandibular bone or maxillary expansion. Current evidence shows that SCs also have potential to be used to regenerate infrabony alveolar defects and move the teeth into regenerated areas. Future application of SCs in orthodontics could involve accelerating tooth movement, regenerating resorbed roots and expanding tooth movement limitations. However, evidence supporting these roles is weak and further studies are required to evaluate the possibility of these ideas.

关键词： Alveolar bone grafting Dentofacial deformities Distraction osteogenesis Guided tissue regeneration Orthodontics Orthodontic tooth movement Orthognathic surgery Periodontitis Root resorption Stem cells

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Resistance status of main malaria vector, Liston (Diptera:Culicidae) to insecticides in a malaria Endemic Area,Southern Iran

引用

Asian Pacific Journal of Tropical Medicine 2019年第1期12卷 43-48页

作者： Madineh Abbasi Ahmad Ali Hanafi-Bojd Mohammad reza Yaghoobi-Ershadi Hassan Vatandoost Mohammad Ali Oshaghi Teimour Hazratian Mohammad Mehdi Sedaghat Sajjad Fekri reza safari Abdol Rasoul Mojahedi Yousef Salari Department of Medical Entomology & Vector Control School of Public Health Tehran University of Medical Sciences Department of Environmental Chemical Pollutants and Pesticides Institute for Environmental Research Tehran University of Medical Sciences Department of Parasitology School of Medicine Tabriz University of Medical Sciences Department of Diseases Control Hormozgan University of Medical Sciences

Objective: To evaluate the susceptibility of Anopheles stephensi(An. stephensi) Liston, the main malaria vector in southern Iran, to WHO recommended insecticides. Methods: Larvae of An. stephensi were collected from three different larval habitats in both urban and rural area of Bandar Abbas city and one rural area in Rudan county southern Iran. WHO standard method was used for evaluation of adult and larval mosquito susceptibility. Bendiocarb, permethrin, lambda-cyhalothrin, deltamethrin as insecticide and temephos and chlorpyriphos as larvicide were used at the diagnostic dosages recommended by WHO. Results: Findings of this study showed all larval populations of An. stephensi were completely susceptible to temephos and candidate for resistance to chlorpyriphos. Adult mosquitoes in rural areas of Bandar Abbas city were resistant to pyrethroid and carbamate insecticides. Conclusion: Comparison of the results of this survey with previous studies indicates that the resistance to pyrethroids and carbamates in this malaria endemic region is increasing. Wide use of pesticides in agriculture is certainly effective in increasing resistance. The inter-sectoral coordination and collaboration in health and agriculture seem to be necessary to manage insecticide resistance in malaria vectors.

关键词： Anopheles stephensi Insecticide resistance Pyrethroids Carbamates

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Immunomodulatory effects of astragalus polysaccharide on Human peripheral blood mononuclear cells co-cultured with cervical cancer cell lineImmunomodulatory effects of astragalus polysaccharide on Human peripheral blood mononuclear cells co-cultured with cervical cancer cell line

引用

Journal of Traditional Chinese Medicine 2021年第5期41卷 684-694页

作者： Elham Shokati Mohammad-reza Shokri Kobra Entezami Samaneh Khorrami Mona Amani Morteza Motallebnezhad Elahe safari Immunology Research Center Institute of Immunology and Infectious DiseasesIran University of Medical SciencesTehran ***Iran Department of Immunology Faculty of Medical SciencesIran University of Medical SciencesTehran ***Iran Department of Immunology School of Public HealthTehran University of Medical SciencesTehran ***Iran

OBJECTIVE:To investigate immunomodulatory effects of Astragalus polysaccharides(APS)on the co-culture of peripheral blood mononuclear cells(PBMCs)with He La cervical cancer cell line.METHODS:To assess the proliferation of PBMCs,carboxyfluorescein succinimidyl ester(CFSE)-labeled PBMCs were co-cultured with He La cells and treated with different concentrations of APS.Supernatants of cell culture were collected for cytokines assay via enzyme-linked immunosorbent assay(ELISA).The impact of APS on the proliferation of PBMCs,induction of regulatory T cells(Tregs),and myeloid-derived suppressor cells(MDSCs)was carried out by flow cytometry.RESULTS:It was observed that APS could increase the proliferation of PBMCs co-cultured with He La cells(P0.05).Furthermore,ELISA results demonstrated that APS could decrease IL-10 and TGF-βconcentration(P<0.05).CONCLUSION:The above-mentioned characteristics showed that APS might be able to modulate immune responses and improve anti-tumor effects through increasing the proliferation of PBMCs and decreasing inhibitory cytokines secretion as critical mediators of immune suppression in the tumor microenvironment.

关键词： Astragalus polysaccharides uterine cervical neoplasms HeLa cells coculture techniques cytokines T-lymphocytes,regulatory

来源：

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

Mineral processing plant location using the analytic hierarchy process——a case study:the Sangan iron ore mine(phase 1)

引用

Mining Science and Technology 2010年第5期20卷 691-695页

作者： safari Mohsen ATAEI Mohammad KHALOKAKAIE reza KARAMOZIAN Mohammad Faculty of Mining Engineering Petroleum & GeophysicsShahrood University of Technology

Locating the mineral processing plant near a mine is the most important parameter that affects the whole process.Many factors,and their preferences,should be considered in this stage.The factors include economical,geological,technical,environmental and tectonic parameters.A multi-criteria decision making method is necessary to rank the alternatives.In this paper we describe how plant location is selected by using the Analytic Hierarchy Process(AHP).This method,with eight criteria,was used to select a location for the mineral processing plant at the Sangan iron ore mine(phase 1).Three alternatives for the processing plant were evaluated.The main criteria were distance from the mine,access to heavy machinery transport,the amount of excavation required for grading,bed mixture capacity,belt conveyor length,distance from the tailing dam,distance from the waste dumps and surface water diversion requirements.Finally,the alternatives were ranked and the best location was proposed.

关键词：层次分析法选矿厂位置铁矿多准则决策方法案例运输距离皮带输送机

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：