Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 527

年份

2023 27

2022 38

2021 32

2020 30

2019 19

2018 40

2017 26

2016 41

2015 13

2014 15

2013 27

2012 17

2011 39

2010 22

2009 11

2008 26

2007 14

2006 9

2005 14

2004 11

展开︾

关键词

三峡工程 38

升船机 11

三峡升船机 10

项目管理 8

开放的复杂巨系统 7

复杂系统 4

全寿命周期 3

工程项目 3

施工技术 3

3D打印 2

Agent 2

不确定性 2

从定性到定量综合集成法 2

企业 2

典型信息法 2

决策支持 2

创新 2

可持续发展 2

展开︾

检索范围：

排序：展示方式：

Meta-synthesis management framework of a complex project: A case study of the deck pavement project of

Qiang MAI, Xing-lin GAO, Shi AN, Ding LIU, Ming LIU

《工程管理前沿（英文）》 2018年第5卷第1期页码 4-16 doi: 10.15302/J-FEM-2018076

摘要： Innovative technology and deep uncertainty during the design and construction process of complex projects introduce great challenges to their organization and management. The traditional methods, represented in the project management body of knowledge (PMBOK) guide, can solve systematic problems; however, they cannot solve complex problems. Based on the management practice implemented in the deck pavement project of the Hong Kong-Zhuhai-Macao Bridge (HZMB), in this work, we propose a meta-synthesis management framework for a complex project from the perspective of the science of complexity. The method deems that the complexity of the project has the characteristic of being multi-scale both in the design phase and the construction phase. These problems can be classified into different categories, each of which requires a different strategy. As a result, it is first necessary to adopt the “exploration” strategy to reduce project complexity and to transform the deep uncertainty problems into systematic problems. Then, the “exploitation” strategy should be used to apply the PMBOK and other traditional methods to achieve the design and construction goals of the project and to improve its efficiency. More specifically, in the design phase of a complex project, the “innovative integration” process is used for the exploration of the new engineering technology and knowledge; then, the “functional integration” process is employed to define the system architecture, the interface relationship, the technical index, and other functions. In the construction phase, the “adaptive integration” process is used for the construction of the engineering organization system; next, the “efficient integration” process is employed to improve the actual construction performance. The meta-synthesis management framework proposed in this work reveals the multi-scale principle of solving complex problems in the management practice of a complex project, and develops the methodology of meta-synthesis.

关键词： complex project meta-synthesis management Hong Kong-Zhuhai-Macao Bridge exploration strategy exploitation strategy

HTML PDF 收藏

How does the improved DB mode degrade the complex integrity of infrastructure mega-projects?Evidence from the Hong Kong-Zhuhai-Macao Bridge project in China

Jinwen ZHANG, Yumin QIU

《工程管理前沿（英文）》 2018年第5卷第1期页码 40-51 doi: 10.15302/J-FEM-2018083

摘要： Complex integrity is one of the main characteristics of infrastructure mega-projects (IMPs). Cost, technology, risk, duration, environmental impact, and other uncertain complexities are interrelated and constitute a challenging and complex management problem. At present, there is no unified understanding of or solutions to these complex integrity problems. This study analyzes the complex integrity of the island-tunnel subproject of the Hong Kong-Zhuhai-Macao Bridge (HZMB) project and proposes an improved design-build (DB) mode in which the owner provides a preliminary design and has the right to form and manage consortium. This improved DB mode creatively degrades the special complexities that arise from multiple dimensions. On this basis, it is an efficacious way to grasp the main contradictions, integrate the effective resources, and degrade the complex integrity in multiple dimensions and at multiple levels so as to effectively deal with the complexity management of IMPs.

关键词： Hong Kong-Zhuhai-Macao Bridge project island-tunnel subproject complex integrity complexity degradation the general contracting mode of design-build the design-build consortium

HTML PDF 收藏

Research and Practice of Meta-synthesis Management for the Government-led Urban Complex ConstructionProject

Ru-gui Chen,Jia-meng Chen

《工程管理前沿（英文）》 2014年第1卷第1期页码 52-61 doi: 10.15302/J-FEM-2014008

摘要： This paper researches the overall construction target of government-led urban complex construction projects based on the perspective of sustainable urban development.In order to achieve benefit maximization, the meta-synthesis management for the government-led urban complex construction project is studied.In order to combine theory and practice, several typical government-led urban complex construction project cases, such as Guangzhou Higher Education Mega Center and Guangzhou International Financial City etc. areexamined. These examples point to thefeasibility of government-led meta-synthesis management and demonstrate the benefits that can be achieved through this model.

关键词： government-led construction project urban complex meta-synthesis management sustainable development benefit maximization

HTML PDF 收藏

政府主导的城市综合体建设项目集成管理研究与实践

陈如桂,陈加猛

《中国工程科学》 2013年第15卷第11期页码 53-61

摘要：

本文立足于城市可持续发展的角度，研究政府主导的城市综合体建设项目总体建设目标定位；以综合效益最大化为导向，研究政府主导的城市综合体建设项目的综合集成管理；并遵循理论与实践相结合的方法，对广州大学城和广州国际金融城等政府主导的城市综合体建设项目典型案例进行实践和探索。

关键词：政府主导的建设项目城市综合体综合集成管理可持续发展效益最大化

HTML PDF 收藏

GID complex regulates the differentiation of neural stem cells by destabilizing TET2

《医学前沿（英文）》 doi: 10.1007/s11684-023-1007-9

摘要： Brain development requires a delicate balance between self-renewal and differentiation in neural stem cells (NSC), which rely on the precise regulation of gene expression. Ten-eleven translocation 2 (TET2) modulates gene expression by the hydroxymethylation of 5-methylcytosine in DNA as an important epigenetic factor and participates in the neuronal differentiation. Yet, the regulation of TET2 in the process of neuronal differentiation remains unknown. Here, the protein level of TET2 was reduced by the ubiquitin-proteasome pathway during NSC differentiation, in contrast to mRNA level. We identified that TET2 physically interacts with the core subunits of the glucose-induced degradation-deficient (GID) ubiquitin ligase complex, an evolutionarily conserved ubiquitin ligase complex and is ubiquitinated by itself. The protein levels of GID complex subunits increased reciprocally with TET2 level upon NSC differentiation. The silencing of the core subunits of the GID complex, including WDR26 and ARMC8, attenuated the ubiquitination and degradation of TET2, increased the global 5-hydroxymethylcytosine levels, and promoted the differentiation of the NSC. TET2 level increased in the brain of the Wdr26^+/− mice. Our results illustrated that the GID complex negatively regulates TET2 protein stability, further modulates NSC differentiation, and represents a novel regulatory mechanism involved in brain development.

关键词： TET2 GID complex neural stem cells differentiation of neurons

HTML PDF 收藏

Footholds optimization for legged robots walking on complex terrain

《机械工程前沿（英文）》 2023年第18卷第2期 doi: 10.1007/s11465-022-0742-y

摘要： This paper proposes a novel continuous footholds optimization method for legged robots to expand their walking ability on complex terrains. The algorithm can efficiently run onboard and online by using terrain perception information to protect the robot against slipping or tripping on the edge of obstacles, and to improve its stability and safety when walking on complex terrain. By relying on the depth camera installed on the robot and obtaining the terrain heightmap, the algorithm converts the discrete grid heightmap into a continuous costmap. Then, it constructs an optimization function combined with the robot’s state information to select the next footholds and generate the motion trajectory to control the robot’s locomotion. Compared with most existing footholds selection algorithms that rely on discrete enumeration search, as far as we know, the proposed algorithm is the first to use a continuous optimization method. We successfully implemented the algorithm on a hexapod robot, and verified its feasibility in a walking experiment on a complex terrain.

关键词： footholds optimization legged robot complex terrain adapting hexapod robot locomotion control

HTML PDF 收藏

Special issue: Reliability management of complex system

《工程管理前沿（英文）》 2021年第8卷第4期页码 477-479 doi: 10.1007/s42524-021-0175-z

HTML PDF 收藏

Independent cover meshless particle method for complex geotechnical engineering

Jianqiu WU, Yongchang CAI

《结构与土木工程前沿（英文）》 2018年第12卷第4期页码 515-526 doi: 10.1007/s11709-017-0428-4

摘要： A new Independent Cover Meshless Particle (ICMP) method is proposed for the analysis of complex geotechnical engineering. In the ICMP method, the independent rectangular cover regardless of the shape of the analysis model is employed as the influence domain of each discrete node, the general polynomial is employed as the meshless interpolation function of the independent nodal cover, and the Cartesian Transformation Method (CTM) is used for the numerical integration of the nodal covers cut by material interfaces, joints, cracks and faults. The present method has a simple formulation and a low computational cost, and is easy for the numerical analysis and modeling of complex geotechnical engineering. Several typical numerical examples are presented to demonstrate the accuracy and robustness of the proposed method.

关键词： meshless method particle method independent cover CTM geotechnical engineering

HTML PDF 收藏

新形势下黄河水沙调控策略研究

胡春宏,张双虎,张晓明

《中国工程科学》 2022年第24卷第1期页码 122-130 doi: 10.15302/J-SSCAE-2022.01.013

摘要：

黄河水沙调控对保障黄河长久安澜至关重要。近几十年来，受自然因素和水土保持等人类活动的双重影响，黄河来水来沙量持续发生变化，水资源量略有减少、来沙量锐减，为此，科学研判未来黄河来水来沙量是制定水沙调控策略最基础、最关键的科学问题。本文分析了1919—2020 年百年尺度下的黄河来水来沙量的演变情况，并预测了未来50 年的黄河来水来沙量；系统总结了目前黄河水沙调控面临的主要问题，即黄河上游河道淤积萎缩、黄河下游滩区治理策略与高质量发展要求不适应、黄土高原水土流失治理区域不均衡等。在此基础上，提出了新水沙条件下的黄河水沙调控策略建议，一是以黄河上游黑山峡河段开发和古贤水利枢纽建设为重点，完善水沙调控体系；二是黄河下游滩区分区治理、改造河道并释放部分滩区，实现滩区防洪运用与高质量发展的协同；三是科学开展黄土高原分区分类水土保持措施，调整黄土高原治理格局，协同推进生态保护和乡村振兴。

关键词：黄河新水沙条件水沙调控水利枢纽分区治理生态保护

HTML PDF 收藏

Forecast method for used number of parts and components based on complex network

LIU Fu-yun, QI Guo-ning, YANG Qing-hai

《机械工程前沿（英文）》 2006年第1卷第4期页码 479-484 doi: 10.1007/s11465-006-0064-5

摘要： Applying directed complex network to model the main structure of a product family, according to in-degree bi-logarithmic coordinate distribution curve and distribution rule of nodes of the network, in-degree evolving rule of nodes of the network is presented and analytic expression of in-degree probability density of nodes is derived. Through the analysis of the relation between existing kinds of components and existing product numbers, an expression of the relation between kinds of components and product numbers is derived. A forecast method for the increment of component numbers and parts based on the increment of products is presented. As an example, the component numbers of an industrial steam turbine product family is forecasted, forecast result verified and forecast error analyzed.

关键词： complex network industrial component analytic expression forecast

HTML PDF 收藏

Cationic organobismuth complex as an effective catalyst for conversion of CO

Xiaowen ZHANG, Weili DAI, Shuangfeng YIN, Shenglian LUO, Chak-Tong AU

《环境科学与工程前沿（英文）》 2009年第3卷第1期页码 32-37 doi: 10.1007/s11783-008-0068-y

摘要： In order to achieve high-efficiency conversion of CO into valuable chemicals, and to exploit new applications of organobismuth compounds, cationic organobismuth complex with 5,6,7,12-tetrahydrodibenz[c,f] azabismocine framework was examined for the first time for the coupling of CO into cyclic carbonates, using terminal epoxides as substrates and tetrabutylammonium halide as co-catalyst in a solvent-free environment under mild conditions. It is shown that the catalyst exhibited high activity and selectivity for the coupling reaction of CO with a wide range of terminal epoxide. The selectivity of propylene carbonates could reach 100%, and the maximum turnover frequency was up to 10740 h at 120°C and 3 MPa CO pressure when tetrabutylammonium iodide was used as co-catalyst. Moreover, the catalyst is environment friendly, resistant to air and water, and can be readily reused and recycled without any loss of activity, demonstrating a potential in industrial application.

关键词： cationic organobismuth complex terminal epoxide carbon dioxide coupling cyclic carbonate

HTML PDF 收藏

Amino acid promoted hydrogen battery system using Mn-pincer complex for reversible CO hydrogenation to

《能源前沿（英文）》 2022年第16卷第5期页码 697-699 doi: 10.1007/s11708-022-0843-7

HTML PDF 收藏

Redox reactions of iron and manganese oxides in complex systems

Jianzhi Huang, Huichun Zhang

《环境科学与工程前沿（英文）》 2020年第14卷第5期 doi: 10.1007/s11783-020-1255-8

摘要： • Mechanisms of redox reactions of Fe- and Mn-oxides were discussed. • Oxidative reactions of Mn- and Fe-oxides in complex systems were reviewed. • Reductive reaction of Fe(II)/iron oxides in complex systems was examined. • Future research on examining the redox reactivity in complex systems was suggested. Conspectus Redox reactions of Fe- and Mn-oxides play important roles in the fate and transformation of many contaminants in natural environments. Due to experimental and analytical challenges associated with complex environments, there has been a limited understanding of the reaction kinetics and mechanisms in actual environmental systems, and most of the studies so far have only focused on simple model systems. To bridge the gap between simple model systems and complex environmental systems, it is necessary to increase the complexity of model systems and examine both the involved interaction mechanisms and how the interactions affected contaminant transformation. In this Account, we primarily focused on (1) the oxidative reactivity of Mn- and Fe-oxides and (2) the reductive reactivity of Fe(II)/iron oxides in complex model systems toward contaminant degradation. The effects of common metal ions such as Mn2+ , Ca2+, Ni2+, Cr3+ and Cu2+, ligands such as small anionic ligands and natural organic matter (NOM), and second metal oxides such as Al, Si and Ti oxides on the redox reactivity of the systems are briefly summarized.

关键词： Iron oxides manganese oxides reduction oxidation complex systems reaction kinetics and mechanisms

HTML PDF 收藏

A driving pulse edge modulation technique and its complex programming logic devices implementation

Xiao CHEN,Dong-chang QU,Yong GUO,Guo-zhu CHEN

《信息与电子工程前沿（英文）》 2015年第16卷第12期页码 1088-1098 doi: 10.1631/FITEE.1500111

摘要： With the continual increase in switching speed and rating of power semiconductors, the switching voltage spike becomes a serious problem. This paper describes a new technique of driving pulse edge modulation for insulated gate bipolar transistors (IGBTs). By modulating the density and width of the pulse trains, without regulating the hardware circuit, the slope of the gate driving voltage is controlled to change the switching speed. This technique is used in the driving circuit based on complex programmable logic devices (CPLDs), and the switching voltage spike of IGBTs can be restrained through software, which is easier and more flexible to adjust. Experimental results demonstrate the effectiveness and practicability of the proposed method.

关键词： Driving pulse edge modulation Switching voltage spike Complex programmable logic device (CPLD) Active gate drive

HTML PDF 收藏

Percolation-based health management of complex traffic systems

《工程管理前沿（英文）》 2021年第8卷第4期页码 557-571 doi: 10.1007/s42524-021-0174-0

摘要： System health management, which aims to ensure the safe and efficient operation of systems by reducing uncertain risks and cascading failures during their lifetime, is proposed for complex transportation systems and other critical infrastructures, especially under the background of the New Infrastructure Projects launched in China. Previous studies proposed numerous approaches to evaluate or improve traffic reliability or efficiency. Nevertheless, most existing studies neglected the core failure mechanism (i.e., spatio–temporal propagation of traffic congestion). In this article, we review existing studies on traffic reliability management and propose a health management framework covering the entire traffic congestion lifetime, from emergence, evolution to dissipation, based on the study of core failure modes with percolation theory. Aiming to be “reliable, invulnerable, resilient, potential, and active”, our proposed traffic health management framework includes modeling, evaluation, diagnosis, and improvement. Our proposed framework may shed light on traffic management for megacities and urban agglomerations around the world. This new approach may offer innovative insights for systems science and engineering in future intelligent infrastructure management.

关键词： traffic health health management critical infrastructure systems science and engineering

HTML PDF 收藏

标题作者时间类型操作

Meta-synthesis management framework of a complex project: A case study of the deck pavement project of

Qiang MAI, Xing-lin GAO, Shi AN, Ding LIU, Ming LIU

期刊论文

How does the improved DB mode degrade the complex integrity of infrastructure mega-projects?Evidence from the Hong Kong-Zhuhai-Macao Bridge project in China

Jinwen ZHANG, Yumin QIU

期刊论文

Research and Practice of Meta-synthesis Management for the Government-led Urban Complex ConstructionProject

Ru-gui Chen,Jia-meng Chen

期刊论文

政府主导的城市综合体建设项目集成管理研究与实践

陈如桂,陈加猛

期刊论文

GID complex regulates the differentiation of neural stem cells by destabilizing TET2

期刊论文

Footholds optimization for legged robots walking on complex terrain

期刊论文