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期刊论文 25

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关键词

鲁棒性 7

EMD距离 1

MixMax模型 1

PID控制 1

PVA/SiO2 1

ε-不敏感损失函数 1

东亚季风 1

仿生学 1

例外点 1

内模动态 1

区域气候模式 1

厄尔尼诺-南方涛动 1

可塑性 1

同时定位与建图(SLAM);长期;鲁棒性;激光雷达(LiDaR);视觉惯性激光雷达导航(VILN) 1

后量子密码;门限代理重加密;格;鲁棒性;去中心化 1

吸气式高超声速飞行器;随机鲁棒性分析;二次线性调节器;粒子群优化;改进混合粒子群算法 1

坚固性 1

声码器;规则脉冲激励-长时预测;正交频分复用;快速傅立叶变换 1

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Digitalization for supply chain resilience and robustness: The roles of collaboration and formal contracts

《工程管理前沿(英文)》   页码 5-19 doi: 10.1007/s42524-022-0229-x

摘要: Black swan events such as the coronavirus (COVID-19) outbreak cause substantial supply chain disruption risks to modern companies. In today’s turbulent and complex business environment, supply chain resilience and robustness as two critical capabilities for firms to cope with disruptions have won substantial attention from both the academia and industry. Accordingly, this study intends to explore how digitalization helps build supply chain resilience and robustness. Adopting organizational information processing theory, it proposes the mediating effect of supply chain collaboration and the moderating effect of formal contracts. Using survey data of Chinese manufacturing firms, the study applied structural equation modelling to test the research model. Results show that digitalization has a direct effect on supply chain resilience, and supply chain collaboration can directly facilitate both resilience and robustness. Our study also indicates a complementary mediating effect of supply chain collaboration on the relationship between digitalization and supply chain resilience and an indirect-only mediation effect on the relationship between digitalization and supply chain robustness. Findings reveal the differential roles of digitalization as a technical factor and supply chain collaboration as an organizational factor in managing supply chain disruptions. Paradoxically, formal contracts enhance the relationship between digitalization and supply chain resilience but weaken the relationship between supply chain collaboration and supply chain resilience. The validation of moderating effects determines the boundary conditions of digitalization and supply chain collaboration and provides insights into governing supply chain partners’ behavior. Overall, this study enhances the understanding on how to build a resilient and robust supply chain.

关键词: digitalization     supply chain     resilience     robustness     collaboration     formal contract    

Assessment of robustness of structures: Current state of research

Colin BRETT, Yong LU

《结构与土木工程前沿(英文)》 2013年 第7卷 第4期   页码 356-368 doi: 10.1007/s11709-013-0220-z

摘要: The concept of structural robustness and relevant design guidelines have been in existence in the progressive collapse literature since the 1970s following the partial collapse of the Ronan Point apartment building; however, in the more general context, research on the evaluation and enhancement of structural robustness is still relatively limited. This paper is aimed to provide a general overview of the current state of research concerning structural robustness. The focus is placed on the quantification and the associated evaluation methodologies, rather than specific measures to ensure prescriptive robustness requirements. Some associated concepts, such as redundancy and vulnerability, will be discussed and interpreted in the general context of robustness such that the corresponding methodologies can be compared quantitatively using a comparable scale. A framework methodology proposed by the authors is also introduced in line with the discussion of the literature.

关键词: structural robustness     abnormal exposure     vulnerability     collapse     consequence    

一种提高超疏水木材机械稳定性的方法

王成毓,刘峰

《中国工程科学》 2014年 第16卷 第4期   页码 79-82

摘要:

超疏水表面稳定性、耐久性的提升,对于其是否能达到商业应用的要求有着至关重要的作用。本 文将聚乙烯醇(PVA)与二氧化硅(SiO2)复合,通过滴涂法在木材表面形成一层有机-无机复合薄膜,之后对薄膜进行疏水改性,制得了一种机械稳健性较好的超疏水木材。所制得的木材有很好的防水性、较低的滚动角和较好的机械稳定性。

关键词: 超疏水     机械稳定性     PVA/SiO2     木材表面    

Study of the robustness of a low-temperature dual-pressure process for removal of CO

Stefania Moioli, Laura A. Pellegrini, Paolo Vergani, Fabio Brignoli

《化学科学与工程前沿(英文)》 2018年 第12卷 第2期   页码 209-225 doi: 10.1007/s11705-017-1688-1

摘要: The growing use of energy by most of world population and the consequent increasing demand for energy are making unexploited low quality gas reserves interesting from an industrial point of view. To meet the required specifications for a natural gas grid, some compounds need to be removed from the sour stream. Because of the high content of undesired compounds (i.e., CO ) in the stream to be treated, traditional purification processes may be too energy intensive and the overall system may result unprofitable, therefore new technologies are under study. In this work, a new process for the purification of natural gas based on a low temperature distillation has been studied, focusing on the dynamics of the system. The robustness of the process has been studied by dynamic simulation of an industrial-scale plant, with particular regard to the performances when operating conditions are changed. The results show that the process can obtain the methane product with a high purity and avoid the solidification of carbon dioxide.

关键词: CO2 capture     innovative process     cryogenic distillation     dynamic simulation     solid-liquid-vapor equilibrium    

基于频域的PID广义预测控制器的鲁棒性分析

王繁珍,陈增强,姚向峰,袁著祉

《中国工程科学》 2006年 第8卷 第10期   页码 66-70

摘要:

推导了PID广义预测控制器(PID-GPC)的闭环反馈结构, 采用小增益定理获得了存在建模误差(MPM)情况下PID-GPC鲁棒稳定的一个充分条件。然后在频域内分析了PID-GPC控制器的参数选择对其鲁棒性的影响。

关键词: 预测控制     鲁棒性     频域     小增益定理     PID控制    

Reliability-based design for automobiles in China

ZHANG Yimin

《机械工程前沿(英文)》 2008年 第3卷 第4期   页码 369-374 doi: 10.1007/s11465-008-0064-8

摘要: The level of automobile design and manufacturing is an important sign of leadership in science and technology and economic power. The achievements of theories and methods for reliability-based design of automobiles in China are reviewed. For reliability-based design, the theories and practices, optimization, sensitivity, and robustness are estimated. The techniques of reliability-based design for automobiles are developed. The techniques service to the “hollow” phenomena of kernel technology, product innovative power, and independent development power can be solved.

关键词: reliability-based     automobile     sensitivity     optimization     robustness    

基于全局和单调递减鲁棒性策略的鲁棒神经网络训练方法 Research Article

梁震1,吴陶然2,3,刘万伟4,5,薛白2,杨文婧1,王戟1,庞征斌4

《信息与电子工程前沿(英文)》 2023年 第24卷 第10期   页码 1375-1389 doi: 10.1631/FITEE.2300059

摘要: 深度神经网络的鲁棒性引发了学术界和工业界的高度关注,特别是在安全攸关领域。相比于验证神经网络的鲁棒性是否成立,本文关注点在于给定扰动前提下的鲁棒神经网络训练。现有的代表性训练方法——区间边界传播(IBP)和CROWN-IBP——在较小扰动下表现良好,但在较大扰动下性能显著下降,本文称之为衰退风险。具体来说,衰退风险是指与较小扰动情况相比,IBP系列训练方法在较大扰动情况下不能提供预期的鲁棒神经网络的现象。为了缓解这种衰退风险,我们提出一种全局的、单调递减的鲁棒神经网络训练策略,该策略在每个训练轮次考虑多个扰动(全局鲁棒性训练策略),并将其相应的鲁棒性损失以单调递减的权重进行组织(单调递减鲁棒性训练策略)。实验证明,所提策略在较小扰动下能够保持原有算法的性能,在较大扰动下的衰退风险得到很大程度改善。值得注意的是,与原有训练方法相比,所提训练策略保留了更多的模型准确度,这意味着该训练策略更加平衡地考虑了模型的鲁棒性和准确性。

关键词: 鲁棒神经网络;训练方法;衰退风险;全局鲁棒性训练;单调递减鲁棒性    

全尺寸复合楼板的试验 Article

Dennis Lam, Xianghe Dai, Therese Sheehan

《工程(英文)》 2019年 第5卷 第2期   页码 223-233 doi: 10.1016/j.eng.2018.11.021

摘要:

为了研究楼板在复合梁的格栅中的弯曲性能以及面内效应,我们对一种全尺寸复合楼板进行了试验,以降低混凝土板沿主梁线纵向开裂的趋势。在钢板定向平行于梁却不并排放置的情况下,这样的改变非常重要。在这种情况下,重要的是证明从剪切连接件中传递的局部力,以及与欧洲规范4 相比,其所需的横向钢筋量有所减少。研究机制涉及混凝土板产生的面内压缩力,这是由于楼板受到外围的复合梁支撑产生了约束作用;而次梁作为横向纽带用于抵抗楼板中的作用力,否则会导致混凝土板沿主梁线分裂。我们对主梁中心线及外围梁的开裂趋势进行了精密测试,这是自20世纪90年代初卡丁顿试验以来,在实验室条件下进行的第一次大型楼板试验,虽说卡丁顿试验并没有失败。这次楼板试验的目的是即使主梁传递的纵向力相对较高(即设计为全剪切连接件),但混凝土面层中钢筋最小配筋率仅为0.2%。该试验证实,尽管在钢板不连续,以及使用欧洲规范4中规定的横向分布钢筋最小配筋率的情况下,主梁仍然达到了其塑性抗弯性能。在此基础上,我们提出了无 U 形钢筋(U-bars)的边梁剪切连接件的折减系数。

关键词: 楼板试验     复合梁     边梁     欧洲规范4     面内效应     柱移除     坚固性    

电磁防护仿生原理与故障自修复机制研究

原亮,满梦华,常小龙

《中国工程科学》 2014年 第16卷 第3期   页码 76-85

摘要:

借鉴生物神经网络信息传递的抗扰特点,开展了电磁干扰环境下通过仿生方式进行的电子电路抗扰与防护研究,以便采用新原理、新技术和新方法解决传统的电磁干扰防护手段不足的问题。通过基于布尔模型的复杂生物网络拓扑建模与简并特征分析,证明了网络简并性与功能鲁棒性之间的相互作用关系,以解决抗扰原理问题;通过构建基于神经元电路和可塑突触电路的神经网络电路模型,分析了突触权重的分布对于网络自修复特性的影响,以解决防护机制问题。进而,为电磁防护仿生原理及自修复机制的深入研究形成了一定的理论基础并完成了前期实践。

关键词: 仿生学     电磁仿生     电磁防护     简并性     可塑性     鲁棒性    

Comprehensive comparison of small-scale natural gas liquefaction processes using brazed plate heat exchangers

Jitan WU, Yonglin JU

《能源前沿(英文)》 2020年 第14卷 第4期   页码 683-698 doi: 10.1007/s11708-020-0705-0

摘要: The brazed plate heat exchanger (BPHE) has some advantages over the plate-fin heat exchanger (PFHE) when used in natural gas liquefaction processes, such as the convenient installation and transportation, as well as the high tolerance of carbon dioxide (CO ) impurities. However, the BPHEs with only two channels cannot be applied directly in the conventional liquefaction processes which are designed for multi-stream heat exchangers. Therefore, the liquefaction processes using BPHEs are different from the conventional PFHE processes. In this paper, four different liquefaction processes using BPHEs are optimized and comprehensively compared under respective optimal conditions. The processes are compared with respect to energy consumption, economic performance, and robustness. The genetic algorithm (GA) is applied as the optimization method and the total revenue requirement (TRR) method is adopted in the economic analysis. The results show that the modified single mixed refrigerant (MSMR) process with part of the refrigerant flowing back to the compressor at low temperatures has the lowest specific energy consumption but the worst robustness of the four processes. The MSMR with fully utilization of cold capacity of the refrigerant shows a satisfying robustness and the best economic performance. The research in this paper is helpful for the application of BPHEs in natural gas liquefaction processes.

关键词: liquefied natural gas     brazed plate heat exchanger     energy consumption     economic performance     robustness    

A CO and CO

Guoxing Chen, Marc Widenmeyer, Binjie Tang, Louise Kaeswurm, Ling Wang, Armin Feldhoff, Anke Weidenkaff

《化学科学与工程前沿(英文)》 2020年 第14卷 第3期   页码 405-414 doi: 10.1007/s11705-019-1886-0

摘要: A series of novel dense mixed conducting ceramic membranes based on K NiF -type (La Ca ) (Ni Cu )O was successfully prepared through a sol-gel route. Their chemical compatibility, oxygen permeability, CO and CO tolerance, and long-term CO resistance regarding phase composition and crystal structure at different atmospheres were studied. The results show that higher Ca contents in the material lead to the formation of CaCO . A constant oxygen permeation flux of about 0.63 mL·min ·cm at 1173 K through a 0.65 mm thick membrane was measured for (La Ca ) (Ni Cu )O , using either helium or pure CO as sweep gas. Steady oxygen fluxes with no sign of deterioration of this membrane were observed with increasing CO concentration. The membrane showed excellent chemical stability towards CO for more than 1360 h and phase stability in presence of CO for 4 h at high temperature. In addition, this membrane did not deteriorate in a high-energy CO plasma. The present work demonstrates that this (La Ca ) (Ni Cu )O membrane is a promising chemically robust candidate for oxygen separation applications.

关键词: K2NiF4 structure     oxygen permeation membrane     CO2 and CO resistances     CO2 plasma resistance     long-term robustness    

Gray-box modeling and QFT control for precision servo transmission systems

Xiulan BAO, Xuedong CHEN, Xin LUO, Haocheng ZUO

《机械工程前沿(英文)》 2011年 第6卷 第4期   页码 442-448 doi: 10.1007/s11465-011-0242-y

摘要:

Precision servo transmission systems have widely been applied in industrial equipment to achieve high accuracy and high speed motion. However, due to the presence of friction and uncertainty, the characteristics of precision servo transmission systems are variant depends on the working conditions, leading to oscillation and instability in the system performances. In this paper, a grey-box model of the system is established, the model structure derived from the theoretical modeling and the model parameters are obtained by experiments using set membership identification method. This paper proposes two-degrees of freedom (2-DOF) robust position controller for a precision servo transmission system, based on the quantitative feedback theory (QFT), to achieve high accuracy and consistent tracking performance even in presence of considerable system uncertainties and friction disturbances. The results of simulate and experiment validate the effectiveness of the proposed controller.

关键词: precision servo transmission system     modeling     set membership identification     quantitative feedback theory (QFT)     robustness    

基于随机鲁棒性分析的吸气式高超声速飞行器线性二次调节器设计 Article

Lin CAO, Shuo TANG, Dong ZHANG

《信息与电子工程前沿(英文)》 2017年 第18卷 第7期   页码 882-897 doi: 10.1631/FITEE.1601363

摘要: 吸气式高超声速飞行器(air-breathing hypersonic vehicle, AHV)的飞行动力学模型具有高度非线性与多变量耦合等特性,且受到内部不确定性与外部干扰的综合影响,因此需要具有强鲁棒性与高精度的控制器。本文介绍了一种改进的基于随机鲁棒性分析的线性二次调节器(linear-quadratic regulator, LQR)设计方法,用于AHV的纵向飞行控制器设计。首先,应用输入输出反馈线性化技术设计LQR控制器。其次,基于系统参数的不确定性,将系统鲁棒性表征为满足稳定性与设计指标要求的概率,并构建系统鲁棒性与LQR参数之间的映射关系。为了实现系统鲁棒性最大化的目标,提出一种全新的混合粒子群优化算法对LQR的控制参数进行寻优计算。在优化迭代的过程中,使用切诺夫边界理论确定蒙特卡洛估计的随机样本量。最后,仿真结果表明该优化算法可以高效地获取满足设计要求的LQR控制参数最优解。

关键词: 吸气式高超声速飞行器;随机鲁棒性分析;二次线性调节器;粒子群优化;改进混合粒子群算法    

非线性系统的高增益滑模输出跟踪

王新华,陈增强,袁著祉

《中国工程科学》 2004年 第6卷 第2期   页码 38-43

摘要:

基于非线性系统线性化后得到外部动态与内模动态,设计一种线性化观测器,使得当摄动参数在有限范围内任意取值时,观测器误差渐近为零。并且利用在有限时间到达平衡点的连续滑动模态,设计一种连续形式的高增益滑模控制器,使得实际输出与参考输出的差渐近收敛到零。稳定性分析和仿真试验表明,该控制系统具有较强的鲁棒性和快速收敛性。

关键词: 非线性系统     外部动态     内模动态     滑模控制     鲁棒性    

EMD-Tnorm得分规整策略在说话人确认中的应用

李燕萍,丁辉,唐振民

《中国工程科学》 2010年 第12卷 第2期   页码 95-100

摘要:

从两个方面对确认系统进行了改进,在模型方面,扩展了MixMax模型,对复杂的背景噪声等干扰因素在训练说话人模型的同时也进行了建模,最大程度上消除噪声的影响,对说话人的特征分布进行了更真实的表征;在得分方面,提出了一种改进的得分规整策略,基于EMD距离从所有背景说话人集合中自适应选择最接近的一定数量的模型构成说话人特定的背景集合,从而进行得分归一化。实验结果表明,该方法能够同时针对说话人和测试环境的不同进行补偿,进一步降低了误识率和漏警率,获得了很好的确认性能。

关键词: 说话人确认     鲁棒性     EMD距离     MixMax模型    

标题 作者 时间 类型 操作

Digitalization for supply chain resilience and robustness: The roles of collaboration and formal contracts

期刊论文

Assessment of robustness of structures: Current state of research

Colin BRETT, Yong LU

期刊论文

一种提高超疏水木材机械稳定性的方法

王成毓,刘峰

期刊论文

Study of the robustness of a low-temperature dual-pressure process for removal of CO

Stefania Moioli, Laura A. Pellegrini, Paolo Vergani, Fabio Brignoli

期刊论文

基于频域的PID广义预测控制器的鲁棒性分析

王繁珍,陈增强,姚向峰,袁著祉

期刊论文

Reliability-based design for automobiles in China

ZHANG Yimin

期刊论文

基于全局和单调递减鲁棒性策略的鲁棒神经网络训练方法

梁震1,吴陶然2,3,刘万伟4,5,薛白2,杨文婧1,王戟1,庞征斌4

期刊论文

全尺寸复合楼板的试验

Dennis Lam, Xianghe Dai, Therese Sheehan

期刊论文

电磁防护仿生原理与故障自修复机制研究

原亮,满梦华,常小龙

期刊论文

Comprehensive comparison of small-scale natural gas liquefaction processes using brazed plate heat exchangers

Jitan WU, Yonglin JU

期刊论文

A CO and CO

Guoxing Chen, Marc Widenmeyer, Binjie Tang, Louise Kaeswurm, Ling Wang, Armin Feldhoff, Anke Weidenkaff

期刊论文

Gray-box modeling and QFT control for precision servo transmission systems

Xiulan BAO, Xuedong CHEN, Xin LUO, Haocheng ZUO

期刊论文

基于随机鲁棒性分析的吸气式高超声速飞行器线性二次调节器设计

Lin CAO, Shuo TANG, Dong ZHANG

期刊论文

非线性系统的高增益滑模输出跟踪

王新华,陈增强,袁著祉

期刊论文

EMD-Tnorm得分规整策略在说话人确认中的应用

李燕萍,丁辉,唐振民

期刊论文