资源类型

期刊论文 476

会议视频 17

年份

2023 38

2022 54

2021 42

2020 36

2019 36

2018 30

2017 33

2016 19

2015 19

2014 11

2013 19

2012 14

2011 22

2010 14

2009 13

2008 15

2007 16

2006 23

2005 6

2004 2

展开 ︾

关键词

系统集成 7

能源 6

仿真 3

CAN总线 2

Preissmann格式 2

光伏发电 2

养护管理 2

农业科学 2

制造业 2

实时控制 2

实时服务 2

数据集成 2

时间序列 2

系统工程 2

集成 2

12相整流 1

2 Mb/s高速信令 1

20 kt级重载组合列车 1

2016年熊本地震 1

展开 ︾

检索范围：

排序： 展示方式：

An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

《机械工程前沿（英文）》 2020年 第15卷 第2期   页码 279-293 doi: 10.1007/s11465-019-0575-5

摘要： In structural design optimization involving transient responses, time integration scheme plays a crucial role in sensitivity analysis because it affects the accuracy and stability of transient analysis. In this work, the influence of time integration scheme is studied numerically for the adjoint shape sensitivity analysis of two benchmark transient heat conduction problems within the framework of isogeometric analysis. It is found that (i) the explicit approach ( = 0) and semi-implicit approach with <0.5 impose a strict stability condition of the transient analysis; (ii) the implicit approach ( =1) and semi-implicit approach with > 0.5 are generally preferred for their unconditional stability; and (iii) Crank–Nicolson type approach ( =0.5) may induce a large error for large time-step sizes due to the oscillatory solutions. The numerical results also show that the time-step size does not have to be chosen to satisfy the critical conditions for all of the eigen-frequencies. It is recommended to use for unconditional stability, such that the oscillation condition is much less critical than the Crank–Nicolson scheme, and the accuracy is higher than a fully implicit approach.

关键词： isogeometric shape optimization     design-dependent boundary condition     transient heat conduction     implicit time integration     adjoint method    

HTML PDF 收藏

高拱坝施工实时控制系统集成理论与应用

任炳昱,吴斌平

《中国工程科学》 2011年 第13卷 第12期   页码 84-90

摘要：

针对高拱坝施工过程具有很强的复杂性和随机性的特征，提出将系统集成理论应用于高拱坝施工实时控制中，设计了高拱坝施工实时控制系统集成框架，从数据信息集成、应用功能集成、技术方法集成和监控指标集成4个方面详细论述了系统集成的实现过程，并研制开发了网络平台下的高拱坝施工实时控制系统。工程应用实例表明，基于系统集成理论构建的高拱坝施工实时控制系统能对高拱坝施工过程实现动态的集成控制与分析，有效地提高了大坝建设管理水平。

关键词： 实时控制     系统集成     数据集成     网络平台     高拱坝施工    

HTML PDF 收藏

Analysis of molten metal spreading and solidification behaviors utilizing moving particle full-implicit

《能源前沿（英文）》 2021年 第15卷 第4期   页码 959-973 doi: 10.1007/s11708-021-0753-0

摘要： To retrieve the fuel debris in Fukushima Daiichi Nuclear Power Plants (1F), it is essential to infer the fuel debris distribution. In particular, the molten metal spreading behavior is one of the vital phenomena in nuclear severe accidents because it determines the initial condition for further accident scenarios such as molten core concrete interaction (MCCI). In this study, the fundamental molten metal spreading experiments were performed with different outlet diameters and sample amounts to investigate the effect of the outlet for spreading-solidification behavior. In the numerical analysis, the moving particle full-implicit method (MPFI), which is one of the particle methods, was applied to simulate the spreading experiments. In the MPFI framework, the melting-solidification model including heat transfer, radiation heat loss, phase change, and solid fraction-dependent viscosity was developed and implemented. In addition, the difference in the spreading and solidification behavior due to the outlet diameters was reproduced in the calculation. The simulation results reveal the detailed solidification procedure during the molten metal spreading. It is found that the viscosity change and the solid fraction change during the spreading are key factors for the free surface condition and solidified materials. Overall, it is suggested that the MPFI method has the potential to simulate the actual nuclear melt-down phenomena in the future.

关键词： molten metal spreading     solidification     particle method     severe accident     fuel debris     decommissioning    

HTML PDF 收藏

车路集成环境下BRT专用道时分复用的车路协作方法研究

董红召,凌越,刘冬旭,郭明飞

《中国工程科学》 2012年 第14卷 第7期   页码 68-73

摘要：

为了提高BRT(bus rapid transit)专用道的利用率，基于车辆道路信息集成及协作技术，提出BRT专用道路权时分复用的车路协作方法，建立了BRT专用道时分复用的车路协作控制策略模型。研究了分段式BRT行程时间预测算法，结合实时交通流信息，建立车辆借还BRT专用道的换道时间模型，规划了车辆借还协作时序。实验表明，车辆协作控制策略中行程时间预测和借还时间估计接近实际值，并能够有效地实现专用道的时分复用，而不干扰BRT的优先运行。

关键词： 车路集成环境     车辆协作     BRT专用道     时分复用     换道时间模型    

HTML PDF 收藏

Integration of VR with BIM to facilitate real-time creation of bill of quantities during the design phase

Jordan DAVIDSON, John FOWLER, Charalampos PANTAZIS, Massimo SANNINO, Jordan WALKER, Moslem SHEIKHKHOSHKAR, Farzad Pour RAHIMIAN

《工程管理前沿（英文）》 2020年 第7卷 第3期   页码 396-403 doi: 10.1007/s42524-019-0039-y

摘要： As building practices change, procedures that seemed indispensable at one point can be abandoned for others, one example of which is the bill of quantities (B/Q). Research into the extant literature attributes the declining use of B/Qs to a multitude of reasons, such as its complexity, the potentially long time required to produce it, the growth in popularity of non-traditional procurement systems, and the challenge of using the information within the document in a construction schedule. With these issues in mind, building information modeling (BIM) and virtual reality (VR) are combined and proposed as a potential solution that allows inclusion of the client into the design process. Following a literature review and precedent study, an experiment was carried out using this new process to simulate a client’s design decisions on window and interior furnishings. The choices made by the client using VR automatically updated a B/Q schedule built in Revit and allowed them to have a firm understanding of project costs. Besides giving the client more confidence in a pleasing final outcome, the technology also ensured an up-to-date, accurate, and easily understandable B/Q. The proposed method features great potential savings in cost and time and gives the B/Q a newfound importance in future construction processes. The research case presented in this paper is a stepping stone in exploring new opportunities offered by VR and BIM and how they could improve the reliability and accuracy of traditional procurement within construction, specifically within the B/Q document.

关键词： virtual reality     bill of quantities     BIM     Revit     real-time synchronisation    

HTML PDF 收藏

Creation and integration mechanism of instrumentation flexible developing system

Xiaoli XU, Qiushuang LIU

《机械工程前沿（英文）》 2011年 第6卷 第2期   页码 235-240 doi: 10.1007/s11465-011-0122-5

摘要：

To solve many key technical problems during the development of modern instrumentation system integration and provide a new mode and fundamental technical equipment for the research and development (R&D) of modern instrumentation products, based on the concept of an instrumentation flexible developing system (IFDS), this paper discusses the creation and open flexible integration mechanism, perfects the integrated supporting environment and integrated system of the flexible interconnection, and constructs the new flexible integrated system. Based on the operation mechanism of the modern instrumentation developing system and the research and optimization of the rapid integration design method, the paper emphasizes the dynamic integrating method of multiple types of knowledge in a modern instrument R&D system, to effectively utilize the rich integrated resource and achieve rapid integration of the system. Applications show that the new IFDS can improve the integration level and efficiency of R&D of the modern instrumentation system, enforce the reliability of the system, shorten the R&D period, and reduce the development costs.

关键词： modern instrumentation developing     flexible interconnection     flexible integration mechanism     rapid integration system     dynamic integrating method    

HTML PDF 收藏

针对异构隐式反馈的置信度估计方法 Article

Jing WANG, Lan-fen LIN, Heng ZHANG, Jia-qi TU, Peng-hua YU

《信息与电子工程前沿（英文）》 2017年 第18卷 第11期   页码 1817-1827 doi: 10.1631/FITEE.1601468

摘要： 隐式反馈是指用户通过行为间接表达用户的意见。由于其在现实世界中的易得性和丰富性，越来越受到推荐系统领域的关注。使用隐式反馈的常见做法是把隐式反馈当做正面或者负面的用户偏好，并附带不同的置信度。这类方法大多认为，与隐式反馈相关的数值（例如观看的时间）反映了置信度的大小，并且数值越大代表置信度越大。这种假设只适合只有一种隐式反馈的场景。然而在现实世界中，经常同时存在多种隐式反馈，称为异构隐式反馈。现有方法无法有效地从异构隐式反馈中推测出置信度。本文提出了一种新颖的利用异构隐式反馈预测置信度的方法，把预测的置信度应用到“基于点的”和“基于对的”矩阵分解模型中，并提出了一种更通用的方法来为“基于对的”方法选择有效的训练样本。在天猫提供的真实电商数据集上的实验表明，本文方法在多个指标上的效果均要优于现有的方法。

关键词： 推荐系统；异构隐式反馈；置信度；协同过滤；电商    

HTML PDF 收藏

采用内嵌时钟控制技术的低功耗双边沿隐形脉冲触发器 Article

Liang GENG,Ji-zhong SHEN,Cong-yuan XU

《信息与电子工程前沿（英文）》 2016年 第17卷 第9期   页码 962-972 doi: 10.1631/FITEE.1500293

摘要： 概要：本文提出了一种新颖的采用内嵌时钟控制技术的双边沿隐形脉冲触发器（dual-edge implicit pulse-triggered flip-flop with an embedded clock-gating所以，DIFF-CGS适用于信号转换频率较低的低功耗超大规模集成电路（very-large-scale integration, VLSI）中。

关键词： 低功耗；触发器；隐性；时钟控制技术；双边沿    

HTML PDF 收藏

任一路面上基于显式和隐式联合仿真技术的某轿车动态响应 Article

胡红舟, 钟志华

《工程（英文）》 2019年 第5卷 第6期   页码 1171-1178 doi: 10.1016/j.eng.2019.09.003

摘要：

本文开展了将数值仿真技术用于某轿车耐久分析的研究。运用了基于显式和隐式的联合仿真，同时通过子模型技术来缩短仿真时间，使整车动态仿真时间达到基于传统有限元分析方法难以达到的低水平。联合仿真模型包含所有必要的非线性因素来保障仿真精度，所有关键件都基于变形体的定义。轮胎与路面的关系通过任一路面与轮胎的接触摩擦仿真实现。通过试验样车在6种不同路面上的仿真与测量值的对比，证明了基于显式和隐式分析的联合仿真技术具有足够的精度与仿真效率。本文同时也讨论了所采用的方法的局限性及将来可能的改进。

关键词： 耐久分析     动态响应     显式隐式联合仿真     接触分析     子模型    

HTML PDF 收藏

Persistent Integration and Innovation Management Mode and Its Applications in Petroleum Production Engineering

He Liu

《工程管理前沿（英文）》 2015年 第2卷 第4期   页码 339-343 doi: 10.15302/J-FEM-2015055

摘要： This paper proposes a new management mode named the persistent integration and innovation management mode to satisfy the requirements by the fast development at oilfields. Taking engineering philosophy as the guidance and technical innovations in petroleum production engineering as the breaking point, the management mode combines long term production practice at oilfields with modern management methods. The management mode integrates intellectuals, techniques, capital, and information and so on to accomplish global optimization of resource configuration. Sets of new techniques, new methods, new technologies and new equipment in petroleum production engineering have been proposed under the guidance of the management mode, achieving great social and economic benefits.

关键词： integration and innovation     engineering philosophy     petroleum production engineering     Daqing Oilfield    

HTML PDF 收藏

Optimization and simultaneous heat integration design of a coal-based ethylene glycol refining process

《化学科学与工程前沿（英文）》 2023年 第17卷 第9期   页码 1280-1288 doi: 10.1007/s11705-023-2301-4

摘要： Coal to ethylene glycol still lacks algorithm optimization achievements for distillation sequencing due to high-dimension and strong nonconvexity characteristics, although there are numerous reports on horizontal comparisons and process revamping. This scenario triggers the navigation in this paper into the simultaneous optimization of parameters and heat integration of the coal to ethylene glycol distillation scheme and double-effect superstructure by the self-adapting dynamic differential evolution algorithm. To mitigate the influence of the strong nonconvexity, a redistribution strategy is adopted that forcibly expands the population search domain by exerting external influence and then shrinks it again to judge the global optimal solution. After two redistributive operations under the parallel framework, the total annual cost and CO2 emissions are 0.61%/1.85% better for the optimized process and 3.74%/14.84% better for the superstructure than the sequential optimization. However, the thermodynamic efficiency of sequential optimization is 11.63% and 10.34% higher than that of simultaneous optimization. This study discloses the unexpected great energy-saving potential for the coal to ethylene glycol process that has long been unknown, as well as the strong ability of the self-adapting dynamic differential evolution algorithm to optimize processes described by the high-dimensional mathematical model.

关键词： ethylene glycol     redistribution     heat integration     optimization     parallel framework    

HTML PDF 收藏

Improvement of solidification model and analysis of 3D channel blockage with MPS method

《能源前沿（英文）》 2021年 第15卷 第4期   页码 946-958 doi: 10.1007/s11708-021-0754-z

摘要： In a severe accident of a nuclear power reactor, coolant channel blockage by solidified molten core debris may significantly influence the core degradations that follow. The moving particle semi-implicit (MPS) method is one of the Lagrangian-based particle methods for analyzing incompressible flows. In the study described in this paper, a novel solidification model for analyzing melt flowing channel blockage with the MPS method has been developed, which is suitable to attain a sufficient numerical accuracy with a reasonable calculation cost. The prompt velocity diffusion by viscosity is prioritized over the prompt velocity correction by the pressure term (for assuring incompressibility) within each time step over the “mushy zone” (between the solidus and liquidus temperature) for accurate modeling of solidification before fixing the coordinates of the completely solidified particles. To sustain the numerical accuracy and stability, the corrective matrix and particle shifting techniques have been applied to correct the discretization errors from irregular particle arrangements and to recover the regular particle arrangements, respectively. To validate the newly developed algorithm, 2-D benchmark analyses are conducted for steady-state freezing of the water in a laminar flow between two parallel plates. Furthermore, 3-D channel blockage analyses of a boiling water reactor (BWR) fuel support piece have been performed. The results show that a partial channel blockage develops from the vicinity of the speed limiter, which does not fully develop into a complete channel blockage, but still diverts the incoming melt flow that follows to the orifice region.

关键词： boiling water reactor (BWR)     severe accident     channel blockage     moving particle semi-implicit (MPS) method     solidification    

HTML PDF 收藏

ENTREPRENEURIAL OPPORTUNITY, VALUE EVOLUTION, AND ORGANIZATIONAL INTEGRATION OF PROFESSIONAL FARMER ENTREPRENEURSHIP

《农业科学与工程前沿（英文）》 2023年 第10卷 第1期   页码 135-148 doi: 10.15302/J-FASE-2022464

摘要：

● The choice of a modern agriculture project was found to be rational for professional farmers to reduce interference from non-market factors. The success of this project is due to its capacity to successfully fill the structural hole in the market transaction network.

关键词： Benefit-linked mechanism     featured agriculture     organizational integration     professional farmers     rural cooperative     structural hole theory    

HTML PDF 收藏

基于兴趣转移模型的协同过滤算法 Article

Bin JU,Yun-tao QIAN,Min-chao YE

《信息与电子工程前沿（英文）》 2016年 第17卷 第6期   页码 489-500 doi: 10.1631/FITEE.1500313

摘要： 通过用户在平台上的浏览和购物次数来预测用户未来可能购买何种物品是推荐系统的热点问题。本文首先假定用户-物品的购买矩阵和浏览矩阵中的频次数据符合泊松分布，并通过概率图模型对两个矩阵进行共享物品因子的分解。然后，提出了一个基于泊松分布先验的多任务非负矩阵分解算法。算法第一阶段，把用户-物品浏览矩阵和用户-物品购买矩阵一起分解为用户浏览兴趣因子矩阵和用户购买兴趣因子矩阵。第二阶段，基于两个兴趣因子矩阵生成所谓的兴趣转移字典。第三阶段，根据兴趣转移字典以及热门商品的筛选规则，重构下一阶段用户-物品的购买矩阵，预测未来用户可能会购买何种物品。

关键词： 推荐系统；协同过滤；多任务非负矩阵分解；泊松分布先验；跨域    

HTML PDF 收藏

基于协同学习的跨语言隐式篇章关系识别 None

Yao-jie LU, Mu XU, Chang-xing WU, De-yi XIONG, Hong-ji WANG, Jin-song SU

《信息与电子工程前沿（英文）》 2018年 第19卷 第5期   页码 651-661 doi: 10.1631/FITEE.1601865

摘要： 标注语料库的缺乏阻碍了中文隐式篇章关系识别研究的进展，而在其他语言（如英语）中存在一些可用的篇章关系语料库。提出一个跨语言的隐式篇章关系识别框架，该框架可利用英语语料库完成中文隐式篇章关系识别任务。使用机器翻译从带标签的英语篇章关系语料库生成中文实例。基于该方法，每个实例都有两个独立视角：中文和英文。然后，利用联合训练方式，分别基于中文和英文视角学习两个分类器，同时利用无标签中文数据帮助完成中文隐式篇章关系识别。实验结果证明该方法有效。

关键词： 跨语言；隐式篇章关系；协同训练    

HTML PDF 收藏

标题 作者 时间 类型 操作

An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

期刊论文

高拱坝施工实时控制系统集成理论与应用

任炳昱,吴斌平

期刊论文

Analysis of molten metal spreading and solidification behaviors utilizing moving particle full-implicit

期刊论文

车路集成环境下BRT专用道时分复用的车路协作方法研究

董红召,凌越,刘冬旭,郭明飞

期刊论文

Integration of VR with BIM to facilitate real-time creation of bill of quantities during the design phase

Jordan DAVIDSON, John FOWLER, Charalampos PANTAZIS, Massimo SANNINO, Jordan WALKER, Moslem SHEIKHKHOSHKAR, Farzad Pour RAHIMIAN

期刊论文

Creation and integration mechanism of instrumentation flexible developing system

Xiaoli XU, Qiushuang LIU

期刊论文

针对异构隐式反馈的置信度估计方法

Jing WANG, Lan-fen LIN, Heng ZHANG, Jia-qi TU, Peng-hua YU

期刊论文

采用内嵌时钟控制技术的低功耗双边沿隐形脉冲触发器

Liang GENG,Ji-zhong SHEN,Cong-yuan XU

期刊论文

任一路面上基于显式和隐式联合仿真技术的某轿车动态响应

胡红舟, 钟志华

期刊论文

Persistent Integration and Innovation Management Mode and Its Applications in Petroleum Production Engineering

He Liu

期刊论文

Optimization and simultaneous heat integration design of a coal-based ethylene glycol refining process

期刊论文

Improvement of solidification model and analysis of 3D channel blockage with MPS method

期刊论文

ENTREPRENEURIAL OPPORTUNITY, VALUE EVOLUTION, AND ORGANIZATIONAL INTEGRATION OF PROFESSIONAL FARMER ENTREPRENEURSHIP

期刊论文

基于兴趣转移模型的协同过滤算法

Bin JU,Yun-tao QIAN,Min-chao YE

期刊论文

基于协同学习的跨语言隐式篇章关系识别

Yao-jie LU, Mu XU, Chang-xing WU, De-yi XIONG, Hong-ji WANG, Jin-song SU

期刊论文