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Aerodynamic challenges in span length of suspension bridges

XIANG Haifan, GE Yaojun

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2, Pages 153-162 doi: 10.1007/s11709-007-0016-0

Abstract: of extreme bridge spans is firstly discussed according to horizontal clearances for navigation and economicalconstruction of deep-water foundation.

Keywords： requirement reasonable limitation challenge particular economical construction

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Can energy storage make off-grid photovoltaic hydrogen production system more economical?

Frontiers of Engineering Management Pages 672-694 doi: 10.1007/s42524-022-0245-x

Abstract: Under the ambitious goal of carbon neutralization, photovoltaic (PV)-driven electrolytic hydrogen (PVEH) production is emerging as a promising approach to reduce carbon emission. Considering the intermittence and variability of PV power generation, the deployment of battery energy storage can smoothen the power output. However, the investment cost of battery energy storage is pertinent to non-negligible expenses. Thus, the installation of energy-storage equipment in a PVEH system is a complex trade-off problem. The primary goals of this study are to compare the engineering economics of PVEH systems with and without energy storage, and to explore time nodes when the cost of the former scenario can compete with the latter by factoring the technology learning curve. The levelized cost of hydrogen (LCOH) is a widely used economic indicator. Represented by seven areas in seven regions of China, results show that the LCOH with and without energy storage is approximately 22.23 and 20.59 yuan/kg in 2020, respectively. In addition, as technology costs drop, the LCOH of a PVEH system with energy storage will be less than that without energy storage in 2030.

Keywords： hydrogen off-grid photovoltaic energy storage LCOH engineering economics

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Fused structures for safer and more economical constructions

Yu-Fei WU, Ying-Wu ZHOU, Biao HU, Xiaoxu HUANG, Scott SMITH

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1, Pages 1-9 doi: 10.1007/s11709-019-0541-7

Abstract: Safety margin and construction costs are two conflicting goals for a structure.safer failure mode is enforced, a fused structure requires a smaller safety factor thus leading to more economicalconstruction without compromising safety.The use of a fuse will also facilitate safer use of advanced construction materials such as fiber-reinforced

Keywords： fused structures structural fuse fiber-reinforced polymer concrete

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Selectively structural fractionation and economical-functionality conversion of lignocellulosic biomass

Chen Hongzhang,Qiu Weihua and Wang Lan

Strategic Study of CAE 2014, Volume 16, Issue 3, Pages 27-36

Abstract:

In this paper，an innovative biomass- refining path called“selective- fractionation and economical-functionalityestablished to prove the feasibility，reasonability and reliability of“selectivefractionation and economicalIn conclusion，“selective- fractionation and economical-functionality”of lignocellulosic materials

Keywords： biorefining heterogeneity of raw material selective-fractionation and economical-functionality industrialized

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Technological and Economical Logic for Intelligent Manufacturing

Guo Zhaohui

Strategic Study of CAE 2018, Volume 20, Issue 4, Pages 97-100 doi: 10.15302/J-SSCAE-2018.04.016

Abstract:

Focusing on the difficulties domestic industrial enterprises are facing while promoting intelligent manufacturing, this article introduces the methods for facilitating in-depth application of related technologies. It is shown through research and comparison, that the fundamental cause of these difficulties is the poor economic efficiency of technology. Therefore, the key to promote the application of certain technology is to improve the economic efficiency of technology. Besides, problems such as out-dated management levels and low requirements for quality are the general causes restraining the economic efficiency of technology. To promote the economic efficiency of technology, strategic goals have to be set for technological transformation and upgrading on a business level, and a higher quality standard should also be set. Meanwhile, intelligent manufacturing related technologies can be used to promote the management level and to address the weaknesses of the enterprises, thus to improve the economic efficiency of technology.

Keywords： smart manufacture industrial Internet Industrial 4.0 Cyberspace

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To Hold the Economical Time of Biology，to Practicea Positive View of Happiness

Gan Ziheng

Strategic Study of CAE 2007, Volume 9, Issue 2, Pages 5-11

Abstract:

As predicted,the global economy is stepping into a so called "biological economy" by 2020, which can be explained as economy mainly dominated by biological technologies. The essay discusses the proposition, definition, classification and characteristic of biological economy, also, the importance of positive view of happiness in a biological economy condition and the reason for emphasizing people's happiness achieving,and the definition of happiness philosophy. It also discusses which views of happiness should be recommended and how to practice a positive view of happiness in the scientific and technological circle in China.

Keywords： biological economy happiness positive view of happiness

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Non-pressurized Heating Reactor——a Realizable And Economical Clean Energy

Tian Jiafu

Strategic Study of CAE 2000, Volume 2, Issue 2, Pages 74-76

Abstract: This is a realizable and economical solution for clean energy supply.

Keywords： atmospheric pollution greenhouse gas nuclear heating

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Wheel/Rail Approach is the Inevitable Choice for Beijing - Shanghai High Speed Railway——Analysis of the Present State of Maglev in Japan and Germany

Jin Lüzhong

Strategic Study of CAE 2000, Volume 2, Issue 7, Pages 22-27

Abstract:

Ever since 1994, the evaluations made by expert have proved that the wheel/rail approach for the Beijing-Shanghai High Speed Railway is feasible. However there were three academicians who proposed in 1999 that China was not suitable to develop wheel/rail type high speed trains and great efforts should be paid to development of maglev trains. Then what are the reasons for almost 10 countries and regions in the world that have constructed or are constructing or are planning to construct this type of high speed railways and none of them have constructed a maglev line in real revenue service so far. And in particular why there still exits a big debate on the development of maglev even in Japan and Germany that have long-term test and research experience. For the latter question, the three academicians have the following explanations： The superiority of maglev system can not be brought into full play due to the fact that the distance from the capitals to major cities is relatively short, the high speed highway network and the wheel/rail type high speed railway network are already available, and they do not feel any urgent needs. The author holds that the crucial point, which is a decisive factor, is that maglev system is rather poor in economic benefits and it is by no means perfect technically. The paper also points out that the maglev system has no superiority over civil aviation and high speed railways in terms of technology and economy except that its speed is higher than wheel/rail type railways. Therefore, the so-called “technical leap-forward”，is hard to find ground. The author proposes that it is better to carry out feasibility study of follow-up nature with regard to the application of maglev system no high speed railways. It is not appropriate to spend several hundred million yuan to build a test section. It is essential to approve the wheel/rail type Beijing - Shanghai High Speed Railway at an early date.

Keywords： high speed railway technical and economical comparison wheel/rail type railways maglev

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Model of Fuzzy Geometric Programming in Economical Power Supply Radius and Optimum Seeking Method

Cao Bingyuan

Strategic Study of CAE 2001, Volume 3, Issue 3, Pages 52-55

Abstract:

The choice of power supply radius for transformer substations is a complicated problem. A fuzzy geometric programming model of power supply radius under the fuzzy environment, including problems of soft constraints and fuzzy functions with fuzzy coefficients, is built in order to determine the best choice with less investment and lower energy loss. From the model built in this paper more information can be collected and more satisfactory results can be obtained compared with other static and dynamic optimum mathematical models such as controlling models and classical geometric programming ones.

Keywords： fuzzy geometric programming economic power supply radius optimum seeking transformer substations capacity (or number)

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Analyzing sustainability of construction equipment in the state of California

Hakob AVETISYAN, Miroslaw SKIBNIEWSKI, Mohammad MOZAFFARPOUR

Frontiers of Engineering Management 2017, Volume 4, Issue 2, Pages 138-145 doi: 10.15302/J-FEM-2017013

Abstract: Construction equipment encompasses highly polluting machines adversely affecting the environment.Management tools are necessary for sustainability assessment of construction equipment fleets to allowis a need for a metrics that will allow companies to accurately assess the sustainability of their constructionThis paper presents an evaluation of construction equipment fleets and data analysis.The metrics for construction equipment evaluation as well as the tool for sustainable decision-making

Keywords： Construction equipment greenhouse gas emissions sustainability index sustainable construction

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Is servitization of construction the inevitable choice of Internet Plus construction?

Hongwei WANG, Dian LIU

Frontiers of Engineering Management 2017, Volume 4, Issue 2, Pages 229-230 doi: 10.15302/J-FEM-2017104

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Application prospect of PSO in hydrology

Dong Qianjin,Cao Guangjing,Wang Xianjia,Dai Huichao,Zhao Yunfa

Strategic Study of CAE 2010, Volume 12, Issue 1, Pages 81-85

Abstract:

The basic algorithm and its flow are introduced at first, then its application to scheduling operation of reservoir, economic operation of hydropower and parameter calibration in hydrology field is discussed, the suggestion for future study is pointed out that should strengthen the study of adaptive mechanism and convergence performance in PSO, compare and combine with other technology, broaden the region of application to hydrology which may supply a new method for solving much optimal problem in hydrology field.

Keywords： hydrology science particle swarm optimization scheduling operation economical operation

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A review of metro construction in China: Organization, market, cost, safety and schedule

Lieyun DING, Jie XU

Frontiers of Engineering Management 2017, Volume 4, Issue 1, Pages 4-19 doi: 10.15302/J-FEM-2017015

Abstract: China is now in an era of large-scale metro construction.

Keywords： metro engineering construction status construction challenges NSFC

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Smart construction site in mega construction projects: A case study on island tunneling project of Hong

Hongtao ZHOU, Hongwei WANG, Wei ZENG

Frontiers of Engineering Management 2018, Volume 5, Issue 1, Pages 78-87 doi: 10.15302/J-FEM-2018075

Abstract: The construction sites of mega construction projects (MCP) often have numerous participants with interfacingA new management mode of construction sites is inspired by these case.In this paper, a new management mode of construction site for MCP has been proposed, namely, smart constructionThe ultimate goal of smart construction site is to accomplish safe, efficient and high-quality constructionand intelligent construction management.

Keywords： mega construction projects smart construction site information perception collaborative work intelligentconstruction management information and communication technologies

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Risks of modular integrated construction: A review and future research directions

Ibrahim Yahaya WUNI, Geoffrey Qiping SHEN, Bon-Gang HWANG

Frontiers of Engineering Management 2020, Volume 7, Issue 1, Pages 63-80 doi: 10.1007/s42524-019-0059-7

Abstract: Stakeholders remain skeptical in adopting modular integrated construction (MiC) because of the associatedbusiness model of MiC nurtures several risks and uncertainties different from those of the conventional constructionResult implies that the risk of MiC has gained extra attention in the construction engineering and managementThe identified CREs contributes to the checklists of risk events in the implementation of offsite constructionuseful contribution to the scholarly literature on the risk of OSC and may prove useful to offsite construction

Keywords： modular integrated construction off-site construction risk events review