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Boundary conditions for axisymmetric piezoelectric cylinder
Baosheng ZHAO, Di WU, Xi CHEN
《机械工程前沿(英文)》 2013年 第8卷 第4期 页码 401-408 doi: 10.1007/s11465-013-0272-8
For axisymmetric piezoelectric cylinder, the reciprocal theorem and the axisymmetric general solution of piezoelasticity are applied in a novel way to obtain the appropriate stress and mixed boundary conditions accurate to all orders for the cylinder of general edge geometry and loadings. A decay analysis technique developed by Gregory and Wan is converted into necessary conditions on the end-data of axisymmetric piezoelectric circular cylinder, and the rapidly decaying solution is established. The prescribed end-data of the circle cylinder must satisfy these conditions in order that they could generate a decaying state within the cylinder. When stress and mixed conditions are imposed on the end of cylinder, these decaying state conditions for the case of axisymmetric deformation of piezoelectric cylinder are derived explicitly. They are then used for the correct formulation of boundary conditions for the theory solution (or the interior solution) of axisymmetric piezoelectric cylinder. The results of the present paper enable us to establish a set of correct boundary conditions, most of which are obtained for the first time.
关键词: solid and structures the axisymmetric deformation the piezoelectric circular cylinder the refined theory Bessel’s Function
Baosheng ZHAO, Yang GAO, Yingtao ZHAO, Dechen ZHANG
《机械工程前沿(英文)》 2011年 第6卷 第3期 页码 318-323 doi: 10.1007/s11465-011-0232-0
The refined theory for axi-symmetric magnetoelastic circular cylinder is deduced systematically and directly from linear magnetoelasticity theory. Based on the general solution of magnetoelastic equation and the Lur’e method, the refined theory yields the solutions for magnetoelastic circular cylinder without ad hoc assumptions. On the basis of the refined theory developed in the present study, solutions are obtained for magnetoelastic circular cylinder with homogeneous and non-homogenous boundary conditions, respectively. For the circular cylinder with homogeneous boundary conditions, the refined theory provides exact solutions that satisfy all of the governing equations. The exact solutions can be divided into three parts: the 2-orders equation, the transcendental equation, and the magnetic equation. In the case of non-homogenous boundary conditions, the approximate governing equations are accurate up to the high-order terms with respect to cylinder radius.
关键词: refined analysis axially symmetric deformation circular cylinder Bessel’s function axial magnetic field
卞有生,蔡博峰,赵楠
《中国工程科学》 2005年 第7卷 第12期 页码 54-60
生态功能区划是区域社会经济协调发展的基础性工作,3S技术则是保证区划科学与准确的重要技术手段。以河南省濮阳市为例,介绍了3S技术在区域生态功能区划中的应用及其优势与特点,即数据的准确性、现势性和科学性得到进一步提高,而且空间分析功能充分实现了不同权重生态因子的叠加,同时在区划过程中充分考虑生态格局对生态功能的影响
A discussion of objective function representation methods in global optimization
Panos M. PARDALOS, Mahdi FATHI
《工程管理前沿(英文)》 2018年 第5卷 第4期 页码 515-523 doi: 10.15302/J-FEM-2018044
Non-convex optimization can be found in several smart manufacturing systems. This paper presents a short review on global optimization (GO) methods. We examine decomposition techniques and classify GO problems on the basis of objective function representation and decomposition techniques. We then explain Kolmogorov’s superposition and its application in GO. Finally, we conclude the paper by exploring the importance of objective function representation in integrated artificial intelligence, optimization, and decision support systems in smart manufacturing and Industry 4.0.
关键词: global optimization decomposition techniques multi-objective DC programming Kolmogorov’s superposition space-filling curve smart manufacturing and Industry 4.0
邓峰,刘现民,杨肖鸳
《中国工程科学》 2004年 第6卷 第10期 页码 83-85
描述了虚拟企业CRM(客户关系管理)系统的特点,分析了虚拟企业CRM的信息流,在此基础上给出了一个分布式的虚拟企业CRM运作系统,其必须由虚拟企业CRM的协调企业统一管理和协调,并构造了虚拟企业CRM系统中的协调企业的功能模块参考结构,提出了实现虚拟企业CRM的技术体系参考模型。
《医学前沿(英文)》 2022年 第16卷 第4期 页码 574-583 doi: 10.1007/s11684-021-0882-1
The function and regulation of OTU deubiquitinases
Jiansen Du, Lin Fu, Yingli Sui, Lingqiang Zhang
《医学前沿(英文)》 2020年 第14卷 第5期 页码 542-563 doi: 10.1007/s11684-019-0734-4
关键词: ubiquitin OTU deubiquitinases structure function regulation
Guilian YI, Yunkang SUI, Jiazheng DU
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 229-234 doi: 10.1007/s11465-011-0128-z
To reduce vibration and noise, a damping layer and constraint layer are usually pasted on the inner surface of a gearbox thin shell, and their thicknesses are the main parameters in the vibration and noise reduction design. The normal acceleration of the point on the gearbox surface is the main index that can reflect the vibration and noise of that point, and the normal accelerations of different points can reflect the degree of the vibration and noise of the whole structure. The K-S function is adopted to process many points’ normal accelerations as the comprehensive index of the vibration characteristics of the whole structure, and the vibration acceleration level is adopted to measure the degree of the vibration and noise. Secondary development of the Abaqus preprocess and postprocess on the basis of the Python scripting programming automatically modifies the model parameters, submits the job, and restarts the analysis totally, which avoids the tedious work of returning to the Abaqus/CAE for modifying and resubmitting and improves the speed of the preprocess and postprocess and the computational efficiency.
关键词: Abaqus secondary development Python language vibration and noise reduction K-S function vibration acceleration level
Hongtao WANG, Huayong WU
《环境科学与工程前沿(英文)》 2009年 第3卷 第1期 页码 112-128 doi: 10.1007/s11783-008-0067-z
关键词: solution library contaminant transport analytical solution dispersion and advection porous media type curve Green's function method (GFM)
Quality Function Deployment Implementation in Construction: A Systematic Literature Review
Elizabeth A. Cudney,William L. Gillis
《工程管理前沿(英文)》 2016年 第3卷 第3期 页码 224-230 doi: 10.15302/J-FEM-2016036
关键词: construction engineering management quality function deployment systematic review
Design and evaluation of a novel biopsy needle with hemostatic function
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-022-0738-7
关键词: cancer diagnosis biopsy needle hemostatic function predictive model coupled Eulerian−Lagrangian
Regulation and function of histone acetyltransferase MOF
null
《医学前沿(英文)》 2014年 第8卷 第1期 页码 79-83 doi: 10.1007/s11684-014-0314-6
The mammalian MOF (male absent on the first), a member of the MYST (MOZ, YBF2, SAS2, and Tip60) family of histone acetyltransferases (HATs), is the major enzyme that catalyzes the acetylation of histone H4 on lysine 16. Acetylation of K16 is a prevalent mark associated with chromatin decondensation. MOF has recently been shown to play an essential role in maintaining normal cell functions. In this study, we discuss the important roles of MOF in DNA damage repair, apoptosis, and tumorigenesis. We also analyze the role of MOF as a key regulator of the core transcriptional network of embryonic stem cells.
关键词: MOF histone acetyltransferase DNA damage repair tumorigenesis embryonic stem cells
Transfer function solving, simulating and testing of thermal dynamics characteristics of a ballscrew
Junyong XIA, Bo WU, Youmin HU, Tielin SHI,
《机械工程前沿(英文)》 2010年 第5卷 第2期 页码 233-241 doi: 10.1007/s11465-010-0014-0
关键词: ballscrew Laplace transform transfer function thermal dynamic characteristics
Comparison in executive function in Chinese preterm and full-term infants at eight months
null
《医学前沿(英文)》 2018年 第12卷 第2期 页码 164-173 doi: 10.1007/s11684-017-0540-9
Executive function (EF) is increasingly recognized as being responsible for adverse developmental outcomes in preterm-born infants. Several perinatal factors may lead to poor EF development in infancy, and the deficits in EF can be identified in infants as young as eight months. A prospective cohort study was designed to study the EF in Chinese preterm infants and examine the relationship between EF in preterm infants and maternal factors during perinatal period. A total of 88 preterm infants and 88 full-term infants were followed from birth to eight months (corrected age). Cup Task and Planning Test was applied to assess the EF of infants, and the Bayley Scale of Infant Development (BSID-III) was used to evaluate cognitive (MDI) and motor abilities (PDI) of infants. In comparison with full-term infants, the preterm infants performed more poorly on all measures of EF including working memory, inhibition to prepotent responses, inhibition to distraction, and planning, and the differences remained after controlling the MDI and PDI. Anemia and selenium deficiency in mothers during pregnancy contributed to the differences in EF performance. However, maternal depression, hypertension, and diabetes during pregnancy were not related to the EF deficits in preterm infants. Future research should focus on the prevention of anemia and selenium deficiency during pregnancy and whether supplementing selenium in mothers during pregnancy can prevent further deterioration and the development of adverse outcomes of their offspring.
关键词: executive function (EF) preterm infant working memory inhibition to prepotent response inhibition to distraction planning
标题 作者 时间 类型 操作
Refined analysis of axi-symmetric circular cylinder in the axial magnetic field without ad hoc assumption
Baosheng ZHAO, Yang GAO, Yingtao ZHAO, Dechen ZHANG
期刊论文
A discussion of objective function representation methods in global optimization
Panos M. PARDALOS, Mahdi FATHI
期刊论文
Lung function and air pollution exposure in adults with asthma in Beijing: a 2-year longitudinal panel
期刊论文
The function and regulation of OTU deubiquitinases
Jiansen Du, Lin Fu, Yingli Sui, Lingqiang Zhang
期刊论文
Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibration and noise reduction
Guilian YI, Yunkang SUI, Jiazheng DU
期刊论文
Analytical solutions of three-dimensional contaminant transport in uniform flow field in porous media: A library
Hongtao WANG, Huayong WU
期刊论文
Quality Function Deployment Implementation in Construction: A Systematic Literature Review
Elizabeth A. Cudney,William L. Gillis
期刊论文
Transfer function solving, simulating and testing of thermal dynamics characteristics of a ballscrew
Junyong XIA, Bo WU, Youmin HU, Tielin SHI,
期刊论文