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Modelling the dynamic response of a solid oxide steam electrolyser to transient inputs during renewable

Qiong CAI, Nigel P. BRANDON, Claire S. ADJIMAN,

《能源前沿（英文）》 2010年 第4卷 第2期   页码 211-222 doi: 10.1007/s11708-010-0037-6

摘要： Hydrogen is regarded as a leading candidate for alternative future fuels. Solid oxide electrolyser cells (SOEC) may provide a cost-effective and green route to hydrogen production especially when coupled to a source of renewable electrical energy. Developing an understanding of the response of the SOEC stack to transient events that may occur during its operation with intermittent electricity input is essential before the realisation of this technology. In this paper, a one-dimensional (1D) dynamic model of a planar SOEC stack has been employed to study the dynamic behaviour of such an SOEC and the prospect for stack temperature control through variation of the air flow rate. Step changes in the average current density from 1.0 to 0.75, 0.5 and 0.2 A/cm have been imposed on the stacks, replicating the situation in which changes in the supply of input electrical energy are experienced, or the sudden switch-off of the stack. Such simulations have been performed both for open-loop and closed-loop cases. The stack temperature and cell voltage are decreased by step changes in the average current density. Without temperature control via variation of the air flow rate, a sudden fall of the temperature and the cell potential occurs during all the step changes in average current density. The temperature excursions between the initial and final steady states are observed to be reduced by the manipulation of the air flow rate. Provided that the change in the average current density does not result in a transition from exothermic to endothermic operation of the SOEC, the use of the air flow rate to maintain a constant steady-state temperature is found to be successful.

关键词： hydrogen production     renewable energy     solid oxide electrolyser cell     1D dynamic model     dynamic behaviour     temperature control    

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蓄滞洪区洪水演进一、二维数值仿真及其在洼淀联合调度中的应用

李大鸣,林毅,周志华

《中国工程科学》 2010年 第12卷 第3期   页码 82-89

摘要：

为了实现蓄滞洪区内各洼淀实时洪水调度，考虑到蓄滞洪区内复杂河网与洼淀交错的情况，建立了河道、滞洪区联合计算的一、二维衔接洪水演进数学模型，在考虑铁路、公路、堤防及桥涵等阻水建筑物等复杂边界条件下，采用有限体积法进行离散和求解。结合蓄滞洪区实时洪水调度仿真系统的总体框架，建立了模拟洪水在蓄滞洪区内任意位置的水位、流速、淹没水深、历时等演进过程的一、二维洪水演进数值仿真系统。结合大清河实测资料对东淀滞洪区洪水演进进行了模型验证，结果基本吻合,并应用该系统对大清河滞洪区五洼联合调度方案进行了实时模拟，分析了洼淀联合调度下出现的倒淀现象，对不同方案进行了比较分析，实现了实时的洪水调度分析。

关键词： 蓄滞洪区     洪水演进     一、二维数值仿真     有限体积法     联合调度    

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Magnetic Co-doped 1D/2D structured -FeO/MoS effectively activated peroxymonosulfate for efficient abatement

《环境科学与工程前沿（英文）》 2023年 第18卷 第3期 doi: 10.1007/s11783-024-1797-2

摘要：

● Magnetic Co- γ -Fe2O3/MoS2 were prepared via facile hydrothermal methods.

关键词： Magnetic Co-γ-Fe2O3/MoS2     Hydrothermal method     Bisphenol A     Degradation pathways     Toxicity analysis    

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解决一维材料黏附行为的实验方法综述 Review

James L. Mead, Shiliang Wang, Sören Zimmermann, Sergej Fatikow, Han Huang

《工程（英文）》 2023年 第24卷 第5期   页码 39-72 doi: 10.1016/j.eng.2023.02.012

摘要：

一维(1D)材料(如纳米管和纳米线)的黏附行为在集成一维组件的新型器件以及基于一维阵列的仿生黏合剂的有效制造、功能和可靠性中起着决定性作用

关键词： 界面粘附     一维材料     纳米线     碳纳米管     纳米操控     表面力     机械剥皮    

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基于一维纳米结构阵列的质子交换膜燃料电池电极设计的研究进展 Review

杜尚峰

《工程（英文）》 2021年 第7卷 第1期   页码 33-49 doi: 10.1016/j.eng.2020.09.014

摘要：

一维（1D）铂基电催化剂对氧还原反应（ORR）展现出了良好的催化活性和稳定性。基于一维铂基纳米结构阵列的三维（3D）有序电极的研究进展表明，它们在解决现有铂/碳（Pt/C）纳米颗粒电极在高性能质子交换膜燃料电池（PEMFC）的传质特性和持久性挑战方面具有巨大的潜力。

关键词： 质子交换膜燃料电池（PEMFC）     电极     一维（1D）     氧还原反应（ORR）     催化剂     有序化    

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Influence of site conditions on seismic design parameters for foundations as determined via nonlinear site response analysis

Muhammad Tariq A. CHAUDHARY

《结构与土木工程前沿（英文）》 2021年 第15卷 第1期   页码 275-303 doi: 10.1007/s11709-021-0685-0

摘要： Site conditions, including geotechnical properties and the geological setting, influence the near-surface response of strata subjected to seismic excitation. The geotechnical parameters required for the design of foundations include mass density ( ), damping ratio ( ), shear wave velocity ( ), and soil shear modulus ( ). The values of the last three parameters are sensitive to the level of nonlinear strain induced in the strata due to seismic ground motion. In this study, the effect of variations in soil properties, such as plasticity index ( ), effective stress ( ), over consolidation ratio (OCR), impedance contrast ratio ( ) between the bedrock and the overlying strata, and depth of soil strata over bedrock ( ), on seismic design parameters ( , , and ) was investigated for National Earthquake Hazards Reduction Program (NEHRP) site classes C and D, through 1D nonlinear seismic site response analysis. The Morris one-at-a-time (OAT) sensitivity analysis indicated that , , and were significantly influenced by variations in , while affected more than it affected and . However, the influence of on these parameters was less significant. It was also found that variations in soil properties influenced seismic design parameters in soil type D more significantly than in soil type C. Predictive relationships for , , and were derived based on the 1D seismic site response analysis and sensitivity analysis results. The , , and values obtained from the analysis were compared with the corresponding values in NEHRP to determine the similarities and differences between the two sets of values. The need to incorporate and in the metrics for determining , , and for the seismic design of foundations was highlighted.

关键词： site effects     1D seismic site response analysis     sensitivity analysis     foundations     shear wave velocity     soil shear modulus    

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基于三维参数模型重建的心脏病理视觉识别 Research Article

肖金肖1,李岩松1,田沄1,徐冬溶2,3,李鹏辉1,赵世凤1,潘云鹤3

《信息与电子工程前沿（英文）》 2022年 第23卷 第9期   页码 1324-1337 doi: 10.1631/FITEE.2200102

摘要： 心脏图像的视觉识别对于心脏病理诊断和治疗具有重要意义。由于可用标注数据集有限，传统方法通常基于三维心脏图像的二维切片对病理分类特征进行提取，难以确保心脏解剖结构的整体一致性。为此，本文提出一种基于三维参数模型重建的心脏病理分类方法。首先，基于收缩末期和舒张末期时相心脏图像的多个三维心脏成像数据重建三维心脏模型。其次，基于重建的三维心脏模型，通过统计形状模型方法构建三维参数模型。然后，基于三维统计形状模型及其视觉知识约束对心脏数据进行增强。最后，提取不同时相的三维心脏模型的形状和运动特征，对心脏病理进行分类。在STACOM公开挑战赛的ACDC数据集上的实验验证了所提方法的优越性和有效性。

关键词： 三维视觉知识；三维参数模型；心脏病理诊断；数据增强    

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AML1-ETO driven acute leukemia: insights into pathogenesis and potential therapeutic approaches

null

《医学前沿（英文）》 2012年 第6卷 第3期   页码 248-262 doi: 10.1007/s11684-012-0206-6

摘要：

The AML1-ETO fusion transcription factor is generated by the t(8;21) translocation, which is present in approximately 4%–12% of adult and 12%–30% of pediatric acute myeloid leukemia (AML) patients. Both human and mouse models of AML have demonstrated that AML1-ETO is insufficient for leukemogenesis in the absence of secondary events. In this review, we discuss the pathogenetic insights that have been gained from identifying the various events that can cooperate with AML1-ETO to induce AML in vivo. We also discuss potential therapeutic strategies for t(8;21) positive AML that involve targeting the fusion protein itself, the proteins that bind to it, or the genes that it regulates. Recently published studies suggest that a targeted therapy for t(8;21) positive AML is feasible and may be coming sometime soon.

关键词： AML1-ETO     mouse model     leukemia     t(8     21)     pathway hits     mutation     hematopoiesis     Kasumi-1     CD34+    

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Migration and fate of polycyclic aromatic hydrocarbons in bioretention systems with different media: experiments and simulations

《环境科学与工程前沿（英文）》 2023年 第18卷 第4期 doi: 10.1007/s11783-024-1802-9

摘要：

● Bioretention systems showed > 92% load reduction rates of PAHs.

关键词： Bioretention     Polycyclic aromatic hydrocarbons     HYDRUS-1D     Model simulation     Migration    

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China ADS sub-critical experimental assembly—Venus-1 and preliminary experiment

SHI Yongqian, XIA Pu, LUO Zhanglin, ZHAO Zhixiang, DING Dazhao, ZHU Qinfu, XIA Haihong, LI Jigen, ZHANG Wei, CAO Jian, QUAN Yanhui, LUO Huangda, WU Xiaofei

《能源前沿（英文）》 2007年 第1卷 第2期   页码 150-157 doi: 10.1007/s11708-007-0019-5

摘要： China s accelerator-driven sub-critical system (ADS) sub-critical experimental assembly Venus-1 and the preliminary experiment is presented. The core of Venus-1 is a coupled one of a fast neutron zone and a thermal neutron zone. The fast neutron zone is at the centre of the core and formed by natural uranium fuel. A fast neutron spectrum field can be produced in the fast neutron zone and used for the transmutation of minor actinides (MAs). The thermal neutron zone surrounds the fast neutron zone and is formed by low-enriched uranium fuel. It is a fission zone. An epithermal neutron zone between the fast neutron zone and the thermal neutron zone can be established for the transmutation of long-lived fission products (LLFP). On July 18, 2005, the first fuel element was loaded into the Venus-1 sub-critical assembly and some preliminary experiments about the sub-critical neutronics were performed. The Venus-1 can be driven by an Am-Be source or other steady neutron source (Cf-252, D-D reaction and D-T reaction) to study the effect of the external neutron source with different energies or a D-T pulsed neutron source on the dynamic characteristics.

关键词： coupled     D-D reaction     dynamic     pulsed neutron     sub-critical assembly    

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基于动态占用网格改进概率模型的换道辅助策略 Research Articles

杨正才1,2,高振海1,高菲1,武馨宇1,何磊1

《信息与电子工程前沿（英文）》 2021年 第22卷 第11期   页码 1492-1504 doi: 10.1631/FITEE.2000439

摘要： 自动驾驶汽车换道辅助是一个热门研究课题。驾驶区域场景建模是解决换道决策问题的前提。提出一种基于动态占用网格的道路环境表示方法。该模型将车辆速度、障碍物、车道线和交通规则等信息封装成一种空间驾驶概率的形式。这些信息被编译成哈希表，通过哈希函数将网格图映射到一个哈希图中。利用该模型建立一个车辆行为决策成本方程，该方程基于最小成本原则，同时考虑车辆驾驶性能、安全性和动力等影响因素，辅助驾驶员做出准确换道决策。通过车辆测试验证了该换道辅助策略的可行性。结果表明，基于动态占用网格概率模型的换道辅助系统可为驾驶者提供兼顾动力和安全性的换道辅助。

关键词： 占用网格；概率模型；换道辅助    

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Effect of friction coefficients on the dynamic response of gear systems

Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI

《机械工程前沿（英文）》 2017年 第12卷 第3期   页码 397-405 doi: 10.1007/s11465-017-0415-4

摘要：

The inevitable deterioration of the lubrication conditions in a gearbox in service can change the tribological properties of the meshing teeth. In turn, such changes can significantly affect the dynamic responses and running status of gear systems. This paper investigates such an effect by utilizing virtual prototype technology to model and simulate the dynamics of a wind turbine gearbox system. The change in the lubrication conditions is modeled by the changes in the friction coefficients, thereby indicating that poor lubrication causes not only increased frictional losses but also significant changes in the dynamic responses. These results are further demonstrated by the mean and root mean square values calculated by the simulated responses under different friction coefficients. In addition, the spectrum exhibits significant changes in the first, second, and third harmonics of the meshing components. The findings and simulation method of this study provide theoretical bases for the development of accurate diagnostic techniques.

关键词： dynamic response     friction coefficient     wind loads     wind turbine gearbox    

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基于RGB-D传感器的室内三维建模及应用研究综述 Review Article

原志路1,李游1,汤圣君1,李明2,郭仁忠1,王伟玺1

《信息与电子工程前沿（英文）》 2021年 第22卷 第6期   页码 815-826 doi: 10.1631/FITEE.2000097

摘要： 随着消费级RGB-D摄像机的快速发展，真实世界的室内三维场景建模和机器人应用越来越受到重视。然而，室内三维场景建模仍具有挑战性，因室内物体结构可能具有较高复杂性，在此情况下，消费者级传感器采集的RGB-D数据质量需进一步提升。近年来，在提高消费者级传感器采集的RGB-D数据质量方面，有很多值得关注的研究。本文介绍了室内场景建模方法的最新进展、室内公共数据集和库以及RGB-D设备的典型应用，包括室内定位和紧急疏散。

关键词： 三维室内制图；RGB-D；室内定位；施工监测；应急疏散    

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Application of consistent geometric decomposition theorem to dynamic finite element of 3D composite beam

Iman FATTAHI, Hamid Reza MIRDAMADI, Hamid ABDOLLAHI

《结构与土木工程前沿（英文）》 2020年 第14卷 第3期   页码 675-689 doi: 10.1007/s11709-020-0625-4

摘要： Analyzing static and dynamic problems including composite structures has been of high significance in research efforts and industrial applications. In this article, equivalent single layer approach is utilized for dynamic finite element procedures of 3D composite beam as the building block of numerous composite structures. In this model, both displacement and strain fields are decomposed into cross-sectional and longitudinal components, called consistent geometric decomposition theorem. Then, the model is discretized using finite element procedures. Two local coordinate systems and a global one are defined to decouple mechanical degrees of freedom. Furthermore, from the viewpoint of consistent geometric decomposition theorem, the transformation and element mass matrices for those systems are introduced here for the first time. The same decomposition idea can be used for developing element stiffness matrix. Finally, comprehensive validations are conducted for the theory against experimental and numerical results in two case studies and for various conditions.

关键词： composite beam     dynamic finite element     degrees of freedom coupling     experimental validation     numerical validation    

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Unit commitment using dynamic programming–an exhaustive working of both classical and stochastic approach

SWARUP, D. P. KOTHARI

《能源前沿（英文）》 2013年 第7卷 第3期   页码 333-341 doi: 10.1007/s11708-013-0259-5

摘要： In the present electricity market, where renewable energy power plants have been included in the power systems, there is a lot of unpredictability in the demand and generation. There are many conventional and evolutionary programming techniques used for solving the unit commitment (UC) problem. Dynamic programming (DP) is a conventional algorithm used to solve the deterministic problem. In this paper DP is used to solve the stochastic model of UC problem. The stochastic modeling for load and generation side has been formulated using an approximate state decision approach. The programs were developed in a MATLAB environment and were extensively tested for a four-unit eight-hour system. The results obtained from these techniques were validated with the available literature and outcome was good. The commitment is in such a way that the total cost is minimal. The novelty of this paper lies in the fact that DP is used for solving the stochastic UC problem.

关键词： unit commitment (UC)     deterministic     stochastic     dynamic programming (DP)     optimization     state diagram    

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标题 作者 时间 类型 操作

Modelling the dynamic response of a solid oxide steam electrolyser to transient inputs during renewable

Qiong CAI, Nigel P. BRANDON, Claire S. ADJIMAN,

期刊论文

蓄滞洪区洪水演进一、二维数值仿真及其在洼淀联合调度中的应用

李大鸣,林毅,周志华

期刊论文

Magnetic Co-doped 1D/2D structured -FeO/MoS effectively activated peroxymonosulfate for efficient abatement

期刊论文

解决一维材料黏附行为的实验方法综述

James L. Mead, Shiliang Wang, Sören Zimmermann, Sergej Fatikow, Han Huang

期刊论文

基于一维纳米结构阵列的质子交换膜燃料电池电极设计的研究进展

杜尚峰

期刊论文

Influence of site conditions on seismic design parameters for foundations as determined via nonlinear site response analysis

Muhammad Tariq A. CHAUDHARY

期刊论文

基于三维参数模型重建的心脏病理视觉识别

肖金肖1,李岩松1,田沄1,徐冬溶2,3,李鹏辉1,赵世凤1,潘云鹤3

期刊论文

AML1-ETO driven acute leukemia: insights into pathogenesis and potential therapeutic approaches

null

期刊论文

Migration and fate of polycyclic aromatic hydrocarbons in bioretention systems with different media: experiments and simulations

期刊论文

China ADS sub-critical experimental assembly—Venus-1 and preliminary experiment

SHI Yongqian, XIA Pu, LUO Zhanglin, ZHAO Zhixiang, DING Dazhao, ZHU Qinfu, XIA Haihong, LI Jigen, ZHANG Wei, CAO Jian, QUAN Yanhui, LUO Huangda, WU Xiaofei

期刊论文

基于动态占用网格改进概率模型的换道辅助策略

杨正才1,2,高振海1,高菲1,武馨宇1,何磊1

期刊论文

Effect of friction coefficients on the dynamic response of gear systems

Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI

期刊论文

基于RGB-D传感器的室内三维建模及应用研究综述

原志路1,李游1,汤圣君1,李明2,郭仁忠1,王伟玺1

期刊论文

Application of consistent geometric decomposition theorem to dynamic finite element of 3D composite beam

Iman FATTAHI, Hamid Reza MIRDAMADI, Hamid ABDOLLAHI

期刊论文

Unit commitment using dynamic programming–an exhaustive working of both classical and stochastic approach

SWARUP, D. P. KOTHARI

期刊论文