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Numerical analysis of strongly nonlinear oscillation systems using He’s max-min method

H. BABAZADEH, G. DOMAIRRY, A. BARARI, R. AZAMI, A. G. DAVODI

《机械工程前沿（英文）》 2011年第6卷第4期页码 435-441 doi: 10.1007/s11465-011-0243-x

摘要：

Nonlinear functions are crucial points and terms in engineering problems. Actual and physical problems can be solved by solving and processing such functions. Thus, most scientists and engineers focus on solving these equations. This paper presents a novel method called the max-min method for presenting an accurate approximate analytical solution to strong nonlinear oscillators. It can solve many linear or nonlinear differential equations without the tangible restriction of sensitivity to the degree of the nonlinear term. It is also quite convenient due to the reduction in the size of calculations. The algorithm suggests a promising approach and is systematically illustrated step by step.

关键词： min-max method nonlinear oscillation duffing equation mathematical pendulum He’s energy balance method

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Controlling interstory drift ratio profiles via topology optimization strategies

《结构与土木工程前沿（英文）》 2023年第17卷第2期页码 165-178 doi: 10.1007/s11709-022-0892-3

摘要： An approach to control the profiles of interstory drift ratios along the height of building structures via topology optimization is proposed herein. The theoretical foundation of the proposed approach involves solving a min–max optimization problem to suppress the maximum interstory drift ratio among all stories. Two formulations are suggested: one inherits the bound formulation and the other utilizes a p-norm function to aggregate all individual interstory drift ratios. The proposed methodology can shape the interstory drift ratio profiles into inverted triangular or quadratic patterns because it realizes profile control using a group of shape weight coefficients. The proposed formulations are validated via a series of numerical examples. The disparity between the two formulations is clear. The optimization results show the optimal structural features for controlling the interstory drift ratios under different requirements.

关键词： interstory drift ratio aggregation function bound formulation min–max problem topology optimization

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波音737 Max Saga——自动化缺陷

Chris Palmer

《工程（英文）》 2020年第6卷第1期页码 2-3 doi: 10.1016/j.eng.2019.11.002

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Genome-wide association study of the backfat thickness trait in two pig populations

Dandan ZHU,Xiaolei LIU,Rothschild MAX,Zhiwu ZHANG,Shuhong ZHAO,Bin FAN

《农业科学与工程前沿（英文）》 2014年第1卷第2期页码 91-95 doi: 10.15302/J-FASE-2014005

摘要： Backfat thickness is a good predictor of carcass lean content, an economically important trait, and a main breeding target in pig improvement. In this study, the candidate genes and genomic regions associated with the tenth rib backfat thickness trait were identified in two independent pig populations, using a genome-wide association study of porcine 60K SNP genotype data applying the compressed mixed linear model (CMLM) statistical method. For each population, 30 most significant single-nucleotide polymorphisms (SNPs) were selected and SNP annotation implemented using Build 10.2. In the first population, 25 significant SNPs were distributed on seven chromosomes, and SNPs on SSC1 and SSC7 showed great significance for fat deposition. The most significant SNP (ALGA0006623) was located on SSC1, upstream of the gene. In the second population, 27 significant SNPs were recognized by annotation, and 12 SNPs on SSC12 were related to fat deposition. Two haplotype blocks, M1GA0016251-MARC0075799 and ALGA0065251-MARC0014203-M1GA0016298-ALGA0065308, were detected in significant regions where the and genes were identified as contributing to fat metabolism. The results indicated that genetic mechanism regulating backfat thickness is complex, and that genome-wide associations can be affected by populations with different genetic backgrounds.

关键词： backfat thickness SNP chip genome-wide association study compressed mixed linear model pig

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基于最大间隔的贝叶斯分类器 Article

Tao-cheng HU,Jin-hui YU

《信息与电子工程前沿（英文）》 2016年第17卷第10期页码 973-981 doi: 10.1631/FITEE.1601078

摘要：概要：多分类学习中经常需要考虑在泛化性能和计算开销间进行权衡。本文提出一个生成式概率多分类器，综合考虑了泛化性和学习/预测速率。我们首先证明了我们的分类器具有最大间隔性质，这意味着对于未来数据的预测精度几乎和训练阶段一样高。此外，我们消除了目标函数中的大量的局部变元，极大地简化了优化问题。通过凸分析和概率语义分析，我们设计了高效的在线算法，与经典情形的最大不同在于这个算法使用聚集而非平均化处理梯度。实验证明了我们的算法具有很好的泛化性能和收敛速度。

关键词：多类学习；最大间隔学习；在线算法

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通过行为足迹学习人类习惯的个性化服务机器人 Article

李坤, Max Q.-H. Meng

《工程（英文）》 2015年第1卷第1期页码 79-84 doi: 10.15302/J-ENG-2015024

摘要：

对家用的私人机器人来说，个性化服务和预先设计的任务同样重要，因为机器人需要根据操作者的习惯调整住宅状况。为了学习由诱因、行为和回报构成的操作者习惯，本文介绍了行为足迹，以描述操作者在家中的行为，并运用逆向增强学习技巧提取用回报函数代表的操作者习惯。本文用一个移动机器人调节室内温度，来实施这个方法，并把该方法和记录操作者所有诱因和行为的基准办法相比较。结果显示，提出的方法可以使机器人准确揭示操作者习惯，并相应地调节环境状况。

关键词：个性化机器人习惯学习行为足迹

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High-order phase-field model with the local and second-order max-entropy approximants

Fatemeh AMIRI

《结构与土木工程前沿（英文）》 2019年第13卷第2期页码 406-416 doi: 10.1007/s11709-018-0475-5

摘要： We approximate the fracture surface energy functional based on phase-field method with smooth local maximum entropy (LME) and second-order maximum entropy (SME) approximants. The higher-order continuity of the meshfree methods such as LME and SME approximants allows to directly solve the fourth-order phase-field equations without splitting the fourth-order differential equation into two second-order differential equations. We will first show that the crack surface functional can be captured more accurately in the fourth-order model with smooth approximants such as LME, SME and B-spline. Furthermore, smaller length scale parameter is needed for the fourth-order model to approximate the energy functional. We also study SME approximants and drive the formulations. The proposed meshfree fourth-order phase-field formulation show more stable results for SME compared to LME meshfree methods.

关键词： second-order maximum entropy local maximum entropy second- and fourth-order phase-field models B-spline

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The MYC transcription factor network: balancing metabolism, proliferation and oncogenesis

null

《医学前沿（英文）》 2018年第12卷第4期页码 412-425 doi: 10.1007/s11684-018-0650-z

摘要：

Transcription factor networks have evolved in order to control, coordinate, and separate, the functions of distinct network modules spatially and temporally. In this review we focus on the MYC network (also known as the MAX-MLX Network), a highly conserved super-family of related basic-helix-loop-helix-zipper (bHLHZ) proteins that functions to integrate extracellular and intracellular signals and modulate global gene expression. Importantly the MYC network has been shown to be deeply involved in a broad spectrum of human and other animal cancers. Here we summarize molecular and biological properties of the network modules with emphasis on functional interactions among network members. We suggest that these network interactions serve to modulate growth and metabolism at the transcriptional level in order to balance nutrient demand with supply, to maintain growth homeostasis, and to influence cell fate. Moreover, oncogenic activation of MYC and/or loss of a MYC antagonist, results in an imbalance in the activity of the network as a whole, leading to tumor initiation, progression and maintenance.

关键词： network transcription cancer MYC MAX MLX

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Profiling and annotation combined method formultimedia application specificMPSoCperformance estimation

Kai HUANG,Xiao-xu ZHANG,Si-wen XIU,Dan-dan ZHENG,Min YU,De MA,Kai HUANG,Gang CHEN,Xiao-lang YAN

《信息与电子工程前沿（英文）》 2015年第16卷第2期页码 135-151 doi: 10.1631/FITEE.1400239

摘要： Accurate and fast performance estimation is necessary to drive design space exploration and thus support important design decisions. Current techniques are either time consuming or not accurate enough. In this paper, we solve these problems by presenting a hybrid method for multimedia multiprocessor system-on-chip (MPSoC) performance estimation. A general coverage analysis tool GNU gcov is employed to profile the execution statistics during the native simulation. To tackle the complexity and keep the analysis and simulation manageable, the orthogonalization of communication and computation parts is adopted. The estimation result of the computation part is annotated to a transaction accurate model for further analysis, by which a gradual refinement of MPSoC performance estimation is supported. The implementation and its experimental results prove the feasibility and efficiency of the proposed method.

关键词： MPSoC Gradual refinement Native simulation Performance estimation Profiling Annotation Gcov

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基于内容和引用的科研文献的主题发现和演化 Article

Hou-kui ZHOU, Hui-min YU, Roland HU

《信息与电子工程前沿（英文）》 2017年第18卷第10期页码 1511-1524 doi: 10.1631/FITEE.1601125

摘要：科研文献数据库中的重要主题随时间的演化的方式已经越来越受到全球研究者的关注。在一个科研论文数据集中，任何一篇论文可以被认为是由组成论文本身的词和论文引用的文献所组成的。在本文中，我们提出了一种名为“Citation-content-LDA (latent Dirichlet allocation)”的主题发现方法，该方法在一个概率生成模型中同时生成文献的引用关系和文献本身的词。Citation-content-LDA模型利用了一种两层结构的主题模型，即利用引用信息生成父主题和利用文本信息生成子主题。模型参数通过吉布斯采样算法来估计。我们还提出了一个主题演化算法，该算法包括主题分割和主题间依赖关系计算两个步骤。我们在IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI)和IEEE Computer Society (CS)两个数据集上测试了提出的Citation-content-LDA模型和主题演化算法，证明了我们提出的算法能有效的发现重要的主题和反映重要研究主题的主题演化情况。经过我们的评价指标的评测，Citation-content-LDA算法的性能优于Content-LDA和Citation-LDA算法。

关键词：主题提取；主题演化；评价方法

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有关间接法预测煤层气含量的讨论

鲜学福,辜敏

《中国工程科学》 2006年第8卷第8期页码 15-22

摘要：

对间接法预测煤层气（甲烷）含量有关的煤层气在煤中赋存状态、煤层气在煤中吸附模型及其相互之间的联系、煤层中游离煤层气及其含量相关计算所需的参数进行了分析讨论，并提出了相应的建议。

关键词：间接法煤层气甲烷吸附/吸收游离

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基于几何控制法的短线预制拼装箱梁研究

王敏,张永涛,刘景红,刘毅,黄跃

《中国工程科学》 2009年第11卷第11期页码 79-81

摘要：

针对短线预制拼装箱梁几何控制过程中制造及安装阶段的误差控制问题，在分析了误差产生原因的基础上，结合苏通大桥B2标的现场实际情况，介绍以几何控制理论为基础，参数敏感性分析为方法，辅以现代误差分析技术和软件开发技术，实现短线法预制拼装的全过程施工数值化管理与控制。

关键词：几何控制误差分析最小二乘法短线预制拼装

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of corrugated panels using homogenization models and a cell-based smoothed mindlin plate element (CS-MIN3

Nhan NGUYEN-MINH, Nha TRAN-VAN, Thang BUI-XUAN, Trung NGUYEN-THOI

《结构与土木工程前沿（英文）》 2019年第13卷第2期页码 251-272 doi: 10.1007/s11709-017-0456-0

摘要： Homogenization is a promising approach to capture the behavior of complex structures like corrugated panels. It enables us to replace high-cost shell models with stiffness-equivalent orthotropic plate alternatives. Many homogenization models for corrugated panels of different shapes have been proposed. However, there is a lack of investigations for verifying their accuracy and reliability. In addition, in the recent trend of development of smoothed finite element methods, the cell-based smoothed three-node Mindlin plate element (CS-MIN3) based on the first-order shear deformation theory (FSDT) has been proposed and successfully applied to many analyses of plate and shell structures. Thus, this paper further extends the CS-MIN3 by integrating itself with homogenization models to give homogenization methods. In these methods, the equivalent extensional, bending, and transverse shear stiffness components which constitute the equivalent orthotropic plate models are represented in explicit analytical expressions. Using the results of ANSYS and ABAQUS shell simulations as references, some numerical examples are conducted to verify the accuracy and reliability of the homogenization methods for static analyses of trapezoidally and sinusoidally corrugated panels.

关键词： homogenization corrugated panel asymptotic analysis smoothed finite element method (S-FEM) cell-based smoothed three-node Mindlin plate element (CS-MIN3)

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Adaptive robust beamformer formulti-pair two-way relay networks with imperfect channel state information

Jin WANG,Feng SHU,Ri-qing CHEN,Yu-di CUI,Yu CHEN,Jun LI

《信息与电子工程前沿（英文）》 2016年第17卷第3期页码 265-280 doi: 10.1631/FITEE.1500134

摘要： In wideband multi-pair two-way relay networks, the performance of beamforming at a relay station (RS) is intimately related to the accuracy of the channel state information (CSI) available. The accuracy of CSI is determined by Doppler spread, delay between beamforming and channel estimation, and density of pilot symbols, including transmit power of pilot symbols. The coefficient of the Gaussian-Markov CSI error model is modeled as a function of CSI delay, Doppler spread, and signal-to-noise ratio, and can be estimated in real time. In accordance with the real-time estimated coefficients of the error model, an adaptive robust maximum signal-to-interferenceand- noise ratio (Max-SINR) plus maximum signal-to-leakage-and-noise ratio (Max-SLNR) beamformer at an RS is proposed to track the variation of the CSI error. From simulation results and analysis, it is shown that: compared to existing non-adaptive beamformers, the proposed adaptive beamformer is more robust and performs much better in the sense of bit error rate (BER); with increase in the density of transmit pilot symbols, its BER and sum-rate performances tend to those of the beamformer of Max-SINR plus Max-SLNR with ideal CSI.

关键词： Multi-pair two-way relay Adaptive robust beamformer Channel state information (CSI) Maximum signal-to-interference-and-noise ratio (Max-SINR) Maximum signal-to-leakage-and-noise ratio (Max-SLNR)

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一种流水车间批量调度的高效计算三阶段优化方法 Research Articles

Hai-yan WANG, Fu ZHAO, Hui-min GAO, John W. SUTHERLAND

《信息与电子工程前沿（英文）》 2019年第20卷第7期页码 1002-1020 doi: 10.1631/FITEE.1700457

摘要：在工件含批量生产任务情况下如何进行最佳生产调度是一个重要的生产计划问题。通常将批量工件划分为子批处理（称为分批优化）。若子批数较大，则会大大增加工件完成时间的计算复杂性。现有研究未能考虑此类计算时间问题。本文考虑可变子批、准备时间以及子批批量约束（传输子批批量受传输设备容量限制），提出一种求解n个工件、m台机器流水车间分批优化调度方法。所提方法包含3个阶段：初始批量划分、基于生产周期/总流程时间指标快速评价法的工件排序优化、分批传输方案调整。为验证3阶段优化方法的有效性，采用5个标准数据集进行测试。实验结果表明，所提方法能节省大量计算时间，尤其对大规模问题能提供更优解。

关键词：批量流；流水车间调度；传输子批；可变批量；批量约束；差分进化

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标题作者时间类型操作

Numerical analysis of strongly nonlinear oscillation systems using He’s max-min method

H. BABAZADEH, G. DOMAIRRY, A. BARARI, R. AZAMI, A. G. DAVODI

期刊论文

Controlling interstory drift ratio profiles via topology optimization strategies

期刊论文

波音737 Max Saga——自动化缺陷

Chris Palmer

期刊论文

Genome-wide association study of the backfat thickness trait in two pig populations