检索结果-南通市图书馆

Numerical Investigation of Effect of Inlet Swirl and Total-pressure Distortion on Performance and Stability of an Axial Transonic Compressor

引用

Journal of Thermal Science 2016年第6期25卷 501-510页

作者： A.Naseri m.boroomand S.Sammak Aerospace Engineering Department Amirkabir University of Technology

This paper represents numerical simulation of flow inside an axial transonic compressor subject to inlet flow distortion,to evaluate its effect on compressor performance and *** types of inlet distortion,namely inlet swirl and total pressure distortion are *** study the effect of combined distortion patterns,different combinations of inlet swirl and total pressure distortion are also *** for cases with total pressure distortion indicate that hub radial distortion improves stability range of the compressor while tip radial distortion deteriorates *** explanation for this observation is presented based on redistribution of flow parameters caused by distortion and the way it interacts with stall inception mechanisms in a transonic axial *** also show that while co-swirl patterns slightly improve stability range of the compressor,counter-swirl patterns diminish *** of combined distortion cases reveals that superimposition of effects of each individual pattern could predict the effect of a combined pattern on compressor's performance within an accuracy of 1%.However,it is unable to predict the associated effect on compressor's stability.

关键词： compressor stall distortion blade inlet axial radial rotor rotating counter

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

microRNAs in thyroid cancer with focus on medullary thyroid carcinoma:potential therapeutic targets and diagnostic/prognostic markers and web based tools

引用

Oncology Research 2024年第6期32卷 1011-1019页

作者： ELHAm SHAKIBA SETI boroomand SImA KHERADmAND KIA mEHDI HEDAYATI Department of Biochemistry Faculty of Biological SciencesNorth Tehran BranchIslamic Azad UniversityTehran***Iran Department of Pathology and Laboratory medicine Vancouver General HospitalVancouverV5Z 1M9Canada Department of Blood Cell Research Laboratory for Red Blood Cell DiagnosticsSanquinAmsterdam1006 ANThe Netherlands Cellular and molecular Endocrine Research Center Research Institute for Endocrine SciencesShahid Beheshti University of Medical SciencesTehran***Iran

This review aimed to describe the inculpation of microRNAs(miRNAs)in thyroid cancer(TC)and its subtypes,mainly medullary thyroid carcinoma(mTC),and to outline web-based tools and databases for bioinformatics analysis of miRNAs in ***,the capacity of miRNAs to serve as therapeutic targets and biomarkers in TC management will be *** review is based on a literature search of relevant articles on the role of miRNAs in TC and its subtypes,mainly ***,web-based tools and databases for bioinformatics analysis of miRNAs in TC were identified and *** can perform as oncomiRs or antioncoges,relying on the target mRNAs they *** replacement therapy using miRNA mimics or antimiRs that aim to suppress the function of certain miRNAs can be applied to correct miRNAs aberrantly expressed in diseases,particularly in *** are involved in the modulation of fundamental pathways related to cancer,resembling cell cycle checkpoints and DNA repair *** are also rather stable and can reliably be detected in different types of biological materials,rendering them favorable diagnosis and prognosis biomarkers as *** have emerged as promising tools for evaluating medical outcomes in TC and as possible therapeutic *** contribution of miRNAs in thyroid cancer,particularly mTC,is an active area of research,and the utility of web applications and databases for the biological data analysis of miRNAs in TC is becoming increasingly important.

关键词： Thyroid cancer microRNAs Biomarker Bioinformatics analysis medullary thyroid carcinoma(mTC) OncomiRs Antioncoges

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

The Effect of Variable Stator on Performance of a Highly Loaded Tandem Axial Flow Compressor Stage

引用

Journal of Thermal Science 2016年第3期25卷 223-230页

作者： Hamzeh Eshraghi masoud boroomand Abolghasem m.Tousi mohammad Toude Fallah Ali mohammadi Department of Aerospace Engineering and Centre of excellence on computational aerospace engineering Amirkabir University of Technology Nanotechnology Research and Application Center Sabanci University

Increasing the aerodynamic load on compressor blades helps to obtain a higher pressure ratio in lower rotational speeds. Considering the high aerodynamic load effects and structural concerns in the design process, it is possible to obtain higher pressure ratios compared to conventional compressors. However, it must be noted that imposing higher aerodynamic loads results in higher loss coemcients and deteriorates the overall performance. To avoid the loss increase, the boundary layer quality must be studied carefully over the blade suction surface. Employment of advanced shaped airfoils （like CDAs）, slotted blades or other boundary layer control methods has helped the de- signers to use higher aerodynamic loads on compressor blades. Tandem cascade is a passive boundary layer control method, which is based on using the flow momentum to control the boundary layer on the suction surface and also to avoid the probable separation caused by higher aerodynamic loads. In fact, the front pressure side flow momentum helps to compensate the positive pressure gradient over the aft blade＇s suction side. Also, in compari- son to the single blade stators, tandem variable stators have more degrees of freedom, and this issue increases the possibility of finding enhanced conditions in the compressor off-design performance. In the current study, a 3D design procedure for an axial flow tandem compressor stage has been applied to design a highly loaded stage. Following, this design is numerically investigated using a CFD code and the stage characteristic map is reported. Also, the effect of various stator stagger angles on the compressor performance and especially on the compressor surge margin has been discussed. To validate the CFD method, another known compressor stage is presented and its performance is numerically investigated and the results are compared with available experimental results.

关键词： Compressor Stage Highly Loaded Performance Characteristic Tandem Variable Stator

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

Estimating monthly Evaporation Using Artificial Neural Networks

引用

Journal of Environmental Science and Engineering 2011年第1期5卷 88-91页

作者： B. boroomand-Nasab m. Joorabian Electrical Engineering Department Engineering Faculty Shahid Chamran University Ahwaz Iran

Predicting evaporation rate is one of important elements for hydrology planning. There are several methods to estimate evaporation from a water surface. The objective of this study was to test the capability of artificial neural networks （ANNs） to predict evaporation using 10 years data set （1999 to 2008） from Ahvaz meteorological station and has been compared with values obtained using pan evaporation. Software Qnet 2000 has been utilized to model the evaporation. The Qnet 2000 was trained with monthly climate data （Solar radiation, minimum and maximum temperature, minimum and maximum relative humidity, and wind velocity） as input. The model was approximately implemented 144 times that finally hyperbolic secant stimulant function of 4 input parameters including minimum temperature, maximum temperature, solar radiation and wind velocity and 6 nodes in hidden layer has been yielded the best outcome. Correlation coefficients （R2） in training and testing sections are to 97.4% and 97.3% respectively. Also maximum errors in training and testing sections equaled to 18% and 24% respectively. Results showed ANNs approach works well for the data set used in this region.

关键词： Evaporation artificial neural networks Ahvaz evaporation pan

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

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

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

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：