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Major bridge development in Hong Kong, China—past, present and future

Michael CH HUI, Doris YAU

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 4,   Pages 405-414 doi: 10.1007/s11709-011-0136-4

Abstract: The first “modern” type of vehicular bridge was built in Hong Kong China in the 1920s.Four of these bridges, including the Tsing Ma Bridge, Kap Shui Mun Bridge, Ting Kau Bridge, and the cable-stayedbridge on the Hong Kong- Shenzhen Western Corridor, are considered to be major bridges supported byAt the same time, the Hong Kong-Zhuhai-Macao Bridge will be in its detailed design stage soon.While efforts have been made by bridge builders to construct these giant structures, the upkeeping of

Keywords： Tsing Ma Bridge     Kap Shui Mun Bridge     Ting Kau Bridge     Stonecutters Bridge     Hong Kong-Zhuhai-Macao Bridge    

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Shan-shui City: the Ideal Human Settlement for China in the 21st Century

Bao Shixing

Strategic Study of CAE 2002, Volume 4, Issue 9,   Pages 19-23

Abstract: At that time, a new concept —“Shan-shui city” was first put forward by Professor Qian“Shan-shui city” model puts emphasis on local history and culture, which is a kind of comprehensionpsychological sense of beauty to their living and working environment are basic goals of building a “Shan-shuiThis is the era background of discussing the idea of “Shan-shui city”.

Keywords： shan-shui city     Qian Xuesen     human settlement    

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Consensus-reaching methods for hesitant fuzzy multiple criteria group decision making with hesitant fuzzy decision making matrices Article

Jie DING, Ze-shui XU, Hu-chang LIAO

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 11,   Pages 1679-1692 doi: 10.1631/FITEE.1601546

Abstract: Group decision making plays an important role in various fields of management decision and economics. In this paper, we develop two methods for hesitant fuzzy multiple criteria group decision making with group consensus in which all the experts use hesitant fuzzy decision matrices (HFDMs) to express their preferences. The aim of this paper is to present two novel consensus models applied in different group decision making situations, which are composed of consensus checking processes, consensus-reaching processes, and selection processes. All the experts make their own judgments on each alternative over multiple criteria by hesitant fuzzy sets, and then the aggregation of each hesitant fuzzy set under each criterion is calculated by the aggregation operators. Furthermore, we can calculate the distance between any two aggregations of hesitant fuzzy sets, based on which the deviation between any two experts is yielded. After introducing the consensus measure, we develop two kinds of consensus-reaching procedures and then propose two step-by-step algorithms for hesitant fuzzy multiple criteria group decision making. A numerical example concerning the selection of selling ways about ‘Trade-Ins’ for Apple Inc. is provided to illustrate and verify the developed approaches. In this example, the methods which aim to reach a high consensus of all the experts before the selection process can avoid some experts’ preference values being too high or too low. After modifying the previous preference information by using our consensus measures, the result of the selection process is much more reasonable.

Keywords： Multiple criteria group decision making     Group consensus     Consensus-reaching process     Hesitant fuzzy decision making matrices     Aggregation operators    

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Long-term settlement behavior of ground around shield tunnel due to leakage of water in soft deposit of Shanghai

Huaina WU, Yeshuang XU, Shui-long SHEN, Jin-chun CHAI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 194-198 doi: 10.1007/s11709-011-0105-y

Abstract: The lining of shield tunnel is usually composed of segments, in which the joints, cracks, and the grouting holes (hereafter called lining deficit) exist. During the long-term running, soils and groundwater may leak from these kinds of lining deficit. The leaking of soil and groundwater causes the long-term ground loss around tunnel and thus results in the settlement of ground surface. This paper aims to analyze the impact of the leakage of groundwater through segments on the long-term settlement of ground surface. The adopted analytical method is based on the theory of groundwater seepage by using numerical simulation. The analyzed results show that settlement of ground surface increases gradually with the increase of the leaked volume of tunnel segments. When the leaked volume was unevenly distributed, differential settlement occurred locally. Comparative analysis by changing the leaked volume was conducted. The results reveal that there is a linear relationship between settlement and leaked volume when the leaked volume was controlled within the allowable limit.

Keywords： lining deficit     leakage of water     shield tunnel     settlement     soft deposit    

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Endosulfan residues and farmers’ replacement behaviors of endosulfan in the north-west inland cotton region

Frontiers of Environmental Science & Engineering 2023, Volume 18, Issue 4, doi: 10.1007/s11783-024-1803-8

Abstract:

● The situation of endosulfan residues in cotton fields were assessed.

Keywords： Cotton fields     Endosulfan residues     Farmers     KAP survey     Replacement behaviours    

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Preparation and catalytic performance of La0.8Sr0.2CoO3 supported on the mullite fiber ceramic

ZENG Lingke, LIU Yanchun, LIU Ping′an, WANG Hui, SHUI Anze, DUAN Bilin

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 4,   Pages 372-376 doi: 10.1007/s11705-007-0067-8

Abstract: The perovskite-type LaSrCoO supported on the mullite fiber porous ceramics was prepared by means of the impregnating method, and was then characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD); thus we can come to the conclusion that the perovskite-type composite oxidant can disperse on the surface of mullite fiber ceramics. The catalytic activity of the LaSrCoO for NO and CO was evaluated. The effect of the doped 0.1 wt-% PdCl on the catalytic activity of the perovskite-type LaSrCoO was also discussed. The results show that the conversion rates of NO and CO respectively reaches 74.5% and 99% at 601°C without doped Pd, and both reach 100% at 350°C with a little doped Pd.

Keywords： porous     conversion     catalytic activity     electron microscopy     perovskite-type LaSrCoO    

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Qian Xuesen and Architectural Science

Bao Shixing

Strategic Study of CAE 2001, Volume 3, Issue 12,   Pages 21-27

Abstract: The concept of Shan-shui City, he suggested, is a probe for the urban developing pattern of socialist

Keywords： Qian Xuesen     architectural science     Shan-shui City    

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Strategies of Efficient Exploration and Development of Deepwater Oil and Gas Overseas

Wen-ming Han,Shui Yu,Hong-yan Zhao,Yang Zhao,Liang Chen

Frontiers of Engineering Management 2016, Volume 3, Issue 4,   Pages 314-320 doi: 10.15302/J-FEM-2016050

Abstract: Deepwater offshore area, with rich oil and gas resources, has currently become the hot area for oil and gas exploration and the main battlefield where global oil majors compete with each other. This article summarizes the current situation of deepwater oil and gas exploration and development overseas from the perspectives of exploration history, exploration achievements and technical progress, and analyzes the difficulties and challenges faced by the industry, such as low level understanding of hydrocarbon accumulation conditions, global security and environmental challenges. And then, several feasible implementation strategies have been proposed on how to actively deal with the challenges, promote Chinese oil companies’ overseas exploration, and realize efficient exploration and development of deepwater oil and gas fields overseas. These strategies consist of three aspects: profit-oriented operation principle, exploration ideas supported by theory and technology, and exploration strategy that puts safety first. In the era of low oil prices, Chinese oil companies must build up confidence, seize the opportunity and face the challenge while taking efforts to innovate technologies and theories, updates strategic ideas, and cultivate deepwater talents so as to be in an active position in global deepwater exploration and development industry in the future.

Keywords： deepwater     exploration and development     operation principle     exploration idea     exploration strategy    

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Impact of roxarsone on the UASB reactor performance and its degradation

Mengchuan Shui, Feng Ji, Rui Tang, Shoujun Yuan, Xinmin Zhan, Wei Wang, Zhenhu Hu

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0871-9

Abstract: Impact of continuous ROX addition on performance of UASB reactor was investigated With continuous ROX addition, severe inhibition to methanogenic activity occurred ROX addition caused the changes in the morphology and bacterial diversity of AGS A possible biotransformation pathway of ROX in the UASB reactor was proposed 60%–70% of the arsenic was discharged to the effluent, and 30%–40% was precipitated Roxarsone (3-nitro-4-hydroxyphenylarsonic acid, ROX) has been widely used for decades as an organoarsenic feed additive to control intestinal parasites and improve feed efficiency in animal production. However, most of the ROX is excreted into the manure, causing arsenic contamination in wastewater. The arsenic compounds are toxic to microorganisms, but the influence of continuous ROX loading on upflow anaerobic sludge blanket (UASB) reactor is still unknown. In this study, the impact of ROX and its degradation products on the performance of the UASB reactor and the degradation and speciation of ROX in the reactor were investigated. The UASB reactor (hydraulic retention time: 1.75 d) was operated using synthetic wastewater supplemented with ROX for a period of 260 days. With continuous ROX addition at 25.0 mg?L , severe inhibition to methanogenic activity occurred after 87 days operation accompanied with an accumulation of volatile fatty acids (VFAs) and a decline in pH. The decrease of added ROX concentration to 13.2 mg?L did not mediate the inhibition. As(III), As(V), MMA(V), DMA(V), HAPA and an unknown arsenic compound were detected in the reactor, and a possible biotransformation pathway of ROX was proposed. Mass balance analysis of arsenic indicated that 60%–70% of the arsenic was discharged into the effluent, and 30%–40% was precipitated in the reactor. The results from this study suggest that we need to pay attention to the stability in the UASB reactors treating organoarsenic-contaminated manure and wastewater, and the effluent and sludge from the reactor to avoid diffusion of arsenic contamination.

Keywords： Anaerobic digestion     Anaerobic granular sludge (AGS)     Arsenic species     Impact     Roxarsone (ROX)     UASB reactor    

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Value Engineering/Value Management Model and Application of Aerospace Projects

Wan-hua Qiu,Han-peng Zhang,Ze-Shui Xu,De-Sheng Wu

Frontiers of Engineering Management 2015, Volume 2, Issue 4,   Pages 373-377 doi: 10.15302/J-FEM-2015056

Abstract: This paper presents a new space model developed by general value engineering/value management model. The authors take the function analysis, function optimization and function realization of the development object as the basic point, to get the final optimization structure by value evaluation, so as to improve the project quality and reduce the project cost. The final case shows that the application of this model can save about 18% of the time and considerable cost of the usually planned projects under the condition of quality assurance.

Keywords： aerospace project     value engineering     value optimization     value stream     design structure matrix    

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The prior rules of designing Ti

Danyao Qu, Lihao Guo, Yujin Zhu, Chen Su, Huanran Feng, Guangjian Zhang, Jia Zhang, Weiwei Wu, Ming-Shui

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 505-517 doi: 10.1007/s11705-020-2013-y

Abstract: Working temperature, sensitivity, and selectivity are some of the characteristics of the applied gas sensors. How to design and fabricate an ideal gas sensor working at room temperature is still challenging and attracting lots of interest. Two-dimensional (2D) materials with ultra-thin structure have been demonstrated as a family of ideal candidates to achieve this goal. Among them, Ti C T MXene, a kind of layered sheet synthesized by selectively etching MAX phases materials, shows remarkable potential to be the sensitive materials solely or in a composite. However, their designing rules are still lacking critical thinking from the viewpoint of the intrinsic property of Ti C T MXene based materials. In this article, two critical features, i.e., the thickness of the sensitive materials, and the scope of the analytes, are elaborated towards Ti C T MXene based gas sensors after characterizing the performance of sensing reducing gases (NH and CO) and oxidizing gas (NO ). First, the thinner the Ti C T MXene sensitive layer, the better the sensitivity. Second, the Ti C T MXene based gas sensor is not suitable for strong and moderate oxidation gas due to its ease of oxidation. These two rules are demonstrated, and could be considered with priority both in the future researches and practical applications.

Keywords： MXene based sensor     prior     reducing gases     oxidizing gases    

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Precast steel–UHPC lightweight composite bridge for accelerated bridge construction

Shuwen DENG, Xudong SHAO, Xudong ZHAO, Yang WANG, Yan WANG

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 364-377 doi: 10.1007/s11709-021-0702-3

Abstract: In this study, a fully precast steel–ultrahigh performance concrete (UHPC) lightweight composite bridge(LWCB) was proposed based on Mapu Bridge, aiming at accelerating construction in bridge engineering.Finite element analyses of Mapu Bridge showed that the nominal stress of critical sections could meet

Keywords： accelerated bridge construction     ultrahigh-performance concrete     steel–UHPC composite bridge     UHPC girder-to-girder    

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Qian Xuesen's Five Theories on Architectural Science

Gu Mengchao

Strategic Study of CAE 2003, Volume 5, Issue 11,   Pages 8-17

Abstract: landscape architecture; the theory on the establishment of urbanology; the theory for building “shan-shui

Keywords： positioning architectural science     architectural philosophy     Chinese landscape architecture     urbanology     shan-shui    

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Vehicle-bridge coupled vibrations in different types of cable stayed bridges

Lingbo WANG,Peiwen JIANG,Zhentao HUI,Yinping MA,Kai LIU,Xin KANG

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1,   Pages 81-92 doi: 10.1007/s11709-015-0306-x

Abstract: Numerical analyses of the coupled vibrations of vehicle-bridge system and the effects of different typesThe bridge model and vehicle model were independently built which have no internal relationship in theimposed on the vehicle and bridge models during the numerical analysis.The judging method, possibility, and criterion of the vehicle-bridge resonance (coupled vibrations) ofto cause vehicle-bridge resonance.

Keywords： vehicle-bridge coupled vibration     cable stayed bridge     resonances of vehicle-bridge system    

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Wheat ear growth modeling based on a polygon Special Feature on Virtual Reality-Research Articl

Jun-xiao XUE, Chen-yang SUN, Jun-jin CHENG, Ming-liang XU, Ya-fei LI, Shui YU

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 9,   Pages 1175-1184 doi: 10.1631/FITEE.1800702

Abstract: Visual inspection of wheat growth has been a useful tool for understanding and implementing agricultural techniques and a way to accurately predict the growth status of wheat yields for economists and policy decision makers. In this paper, we present a polygonal approach for modeling the growth process of wheat ears. The grain, lemma, and palea of wheat ears are represented as editable polygonal models, which can be re-polygonized to detect collision during the growth process. We then rotate and move the colliding grain to resolve the collision problem. A linear interpolation and a spherical interpolation are developed to simulate the growth of wheat grain, performed in the process of heading and growth of wheat grain. Experimental results show that the method has a good modeling effect and can realize the modeling of wheat ears at different growth stages.

Keywords： Visual inspection     Virtual crop     Three-dimensional modeling    

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Title Author Date Type Operation

Major bridge development in Hong Kong, China—past, present and future

Michael CH HUI, Doris YAU

Journal Article

Shan-shui City: the Ideal Human Settlement for China in the 21st Century

Bao Shixing

Journal Article

Consensus-reaching methods for hesitant fuzzy multiple criteria group decision making with hesitant fuzzy decision making matrices

Jie DING, Ze-shui XU, Hu-chang LIAO

Journal Article

Long-term settlement behavior of ground around shield tunnel due to leakage of water in soft deposit of Shanghai

Huaina WU, Yeshuang XU, Shui-long SHEN, Jin-chun CHAI

Journal Article

Endosulfan residues and farmers’ replacement behaviors of endosulfan in the north-west inland cotton region

Journal Article

Preparation and catalytic performance of La0.8Sr0.2CoO3 supported on the mullite fiber ceramic

ZENG Lingke, LIU Yanchun, LIU Ping′an, WANG Hui, SHUI Anze, DUAN Bilin

Journal Article

Qian Xuesen and Architectural Science

Bao Shixing

Journal Article

Strategies of Efficient Exploration and Development of Deepwater Oil and Gas Overseas

Wen-ming Han,Shui Yu,Hong-yan Zhao,Yang Zhao,Liang Chen

Journal Article

Impact of roxarsone on the UASB reactor performance and its degradation

Mengchuan Shui, Feng Ji, Rui Tang, Shoujun Yuan, Xinmin Zhan, Wei Wang, Zhenhu Hu

Journal Article

Value Engineering/Value Management Model and Application of Aerospace Projects

Wan-hua Qiu,Han-peng Zhang,Ze-Shui Xu,De-Sheng Wu

Journal Article

The prior rules of designing Ti

Danyao Qu, Lihao Guo, Yujin Zhu, Chen Su, Huanran Feng, Guangjian Zhang, Jia Zhang, Weiwei Wu, Ming-Shui

Journal Article

Precast steel–UHPC lightweight composite bridge for accelerated bridge construction

Shuwen DENG, Xudong SHAO, Xudong ZHAO, Yang WANG, Yan WANG

Journal Article

Qian Xuesen's Five Theories on Architectural Science

Gu Mengchao

Journal Article

Vehicle-bridge coupled vibrations in different types of cable stayed bridges

Lingbo WANG,Peiwen JIANG,Zhentao HUI,Yinping MA,Kai LIU,Xin KANG

Journal Article

Wheat ear growth modeling based on a polygon

Jun-xiao XUE, Chen-yang SUN, Jun-jin CHENG, Ming-liang XU, Ya-fei LI, Shui YU

Journal Article