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Design and Experimental Research on a New Pipe Rupture Valve

HU Guo-liang, XU Bing, YANG Hua-yong, ZHANG Yi-ding

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 26-32 doi: 10.1007/s11465-005-0009-4

Abstract: The results show that the newly designed pipe rupture valve meets the designing requirement for hydraulic

Keywords： Mathematical     designing requirement     numerical     hydraulic elevator     EN81-2 standard    

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From understanding to designing soundscapes

Jian KANG

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 4,   Pages 403-417 doi: 10.1007/s11709-010-0091-5

Abstract: Soundscape represents a step change in the field of environmental acoustics in that it combines physical, social, and psychological approaches. Although the term soundscape was introduced in the 1960s, significant attention to it has mainly been paid in the last decade or so in the community of environmental acoustics by researchers and recently by practitioners including policy makers. This paper explores the current situation and future challenges in soundscape. Starting with a framework on research and practical needs in soundscape and a brief introduction of some recent/current networks, activities, projects, and publications, this paper then presents a systematic review of recent progress in soundscape research and practice. A short review of the soundscape research in China is also given.

Keywords： soundscape     environment     sound     design     urban     landscape    

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High-end equipment customer requirement analysis based on opinion extraction

Yuejin TAN, Yuren WANG, Xin LU, Mengsi CAI, Bingfeng GE

Frontiers of Engineering Management 2018, Volume 5, Issue 4,   Pages 479-486 doi: 10.15302/J-FEM-2018035

Abstract: Acquisition and analysis of customer requirements are the essential steps in high-end equipment design. Considering that Internet and big data technologies are integrated into the manufacturing industry, we propose a method of analyzing customer requirements based on open-source data. First, online data are collected with focused crawlers and preprocessed to filter noise and duplicate. Then, user opinions are extracted based on the defined template, and users’ sentiments are analyzed. Based on the relationship between user sentiments and attribute parameters, the parameter range that satisfies customers can be obtained. The proposed method is evaluated by using an example of new energy vehicle to verify its availability and feasibility.

Keywords： requirement analysis     opinion extraction     high-end equipment     new energy vehicle    

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Limit of axial force ratio and requirement for stirrups of RC columns with special shape

WANG Yiqun, XU Yidong, ZHAO Yanjing, CHEN Yunxia

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 176-181 doi: 10.1007/s11709-007-0019-x

Abstract: The ductility is calculated to investigate the limit of the axial force ratio and circumstantial requirementThe complete requirement for stirrups of RC column with special shape is given.

Keywords： reinforced concrete     circumstantial requirement     buckling     stirrup     longitudinal reinforcement    

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Strategies on designing multifunctional surfaces to prevent biofilm formation? ?

Yang Lu,Zhanguo Yue,Wei Wang,Zhiqiang Cao

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 3,   Pages 324-335 doi: 10.1007/s11705-015-1529-z

Abstract: Bacteria adhesion and biofilm formation have raised severe problems on public health, food industry and many other areas. A variety of reagents and surface coatings have been developed to kill bacteria and/or limit their interaction with surfaces. It has also attracted many efforts to integrate different bactericidal elements together and maximize antibacterial efficiency. Herein, we review mechanisms for both passive and active approaches to resist and kill bacteria respectively, and discuss integrated strategies based on these two approaches. We also offer perspective on future research direction.

Keywords： antimicrobial     surface     multifunctional    

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Designing an

Boran Wu, Xiaoli Chai, Youcai Zhao, Xiaohu Dai

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 1, doi: 10.1007/s11783-019-1088-5

Abstract:

Remediation of polluted water body via microbial community regulation is proposed.

EAS-induced microbial growth can enhance self-purification of polluted water body.

Principle of EAS is elaborated by the conceptual model description.

Keywords： Remediation     Surface water     Polyhydroxyalkanoates     Microbial proliferation    

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Analysis of suitable geometrical parameters for designing a tendon-driven under-actuated mechanical finger

Francesco PENTA,Cesare ROSSI,Sergio SAVINO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 184-194 doi: 10.1007/s11465-016-0385-y

Abstract:

This study aims to optimize the geometrical parameters of an under-actuated mechanical finger by conducting a theoretical analysis of these parameters. The finger is actuated by a flexion tendon and an extension tendon. The considered parameters are the tendon guide positions with respect to the hinges. By applying such an optimization, the correct kinematical and dynamical behavior of the closing cycle of the finger can be obtained. The results of this study are useful for avoiding the snap-through and the single joint hyperflexion, which are the two breakdowns most frequently observed during experimentation on prototypes. Diagrams are established to identify the optimum values for the tendon guides position of a finger with specified dimensions. The findings of this study can serve as guide for future finger design.

Keywords： tendon-driven fingers     mechanical finger design     under-actuated mechanical systems    

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Cream coated on endotracheal tube with or without epidural lidocaine reduces isoflurane requirement during

Hai Yu, Qinjun Chu, Jin Liu, Li Chen, Ying Wang, Yunxia Zuo

Frontiers of Medicine 2012, Volume 6, Issue 3,   Pages 302-306 doi: 10.1007/s11684-012-0194-6

Abstract: Cream (EC) coated on the endotracheal tube (ETT) with or without epidural anesthesia (EA) on isoflurane requirementThe percentage mean expired concentration (%MEC) was used in calculating the isoflurane requirement.Groups 2, 3, and 4 exhibited a significant reduction on isoflurane requirement compared with group 1Tracheal topical anesthesia using EC coated on ETT with or without EA reduced the isoflurane requirementduring GA, indicating that EC combined with EA exhibited an additive effect on the requirement of general

Keywords： EMLA? Cream     epidural anesthesia     general anesthesia     isoflurane     lidocaine    

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The prior rules of designing Ti

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

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

Abstract: However, their designing rules are still lacking critical thinking from the viewpoint of the intrinsic

Keywords： MXene based sensor     prior     reducing gases     oxidizing gases    

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Residual stresses in coating-based systems, part II: Optimal designing methodologies

ZHANG Xiancheng, WU Yixiong, XU Binshi, WANG Haidou

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 125-136 doi: 10.1007/s11465-007-0022-x

Abstract: In this part of the work, different cases are studied to illustrate the implementation of the analytical models that have been developed in Part I [Front. Mech. Eng. China, 2007, 2(1): 1 12]. Different topics are involved in the optimal design of coating-based systems. Some essential relations among material properties and dimensions of the coating and substrate and the residual stress variations are reflected. For the multilayered coating-based systems, some optimal design methodologies are proposed, such as the decrease in stress discontinuity at the interface between the adjacent layers, the curvature as a function of the coating thickness, the effect of the interlayer on the residual stress redistribution, and so on. For the single-layered coating-based systems, some typical approximations that are often used to predict the residual stresses in the coating-based system or bilayer structure are corrected. A simplified model for predicting the quenching stress in a coating is also developed.

Keywords： function     different     substrate     interlayer     implementation    

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Evaluation of stray current corrosion resistance of concrete in metro construction

YANG Shucai, YANG Xu

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3,   Pages 246-252 doi: 10.1007/s11709-008-0036-4

Abstract: with the same water to binder ratio, and the service life of such kind of concrete meets the basic requirement

Keywords： project     different     requirement     simulation     capability    

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Resilience strategies for sustainable supply chains under budget constraints in the post COVID-19 era

Frontiers of Engineering Management   Pages 143-157 doi: 10.1007/s42524-022-0236-y

Abstract: The COVID-19 outbreak has caused uncertainty risk surges, increased sustainable supply chain vulnerabilities, and challenges to sustainable supply chain resilience (SSCR) management. Therefore, improving SSCR is necessary to alleviate vulnerabilities, and SSCR management must generate large capital investments. However, the economic downturn brought about by the COVID-19 epidemic has made some companies have limited budgets that can be used to improve SSCR. Therefore, the design of resilience solutions needs to fully consider the constraints of budgetary costs. Most of the existing related literature only discusses optimal resilience solutions under certain cost constraints, so such resilience solutions cannot be applied to most enterprises. In this study, we set the cost constraint as a variable quantity, using resilience efficiency and customer satisfaction as indicators, to determine the changing laws of optimal resilience strategies when cost constraints change. These rules can be applied to enterprises with different budgeted costs. Our findings suggest that companies should prioritize sacrificing resilience measures (RMs) related to adaptive capacity when budget costs gradually decline, and RMs related to absorptive capacity are indispensable at all budget levels. Furthermore, the pursuit of environmental and social sustainability cannot be abandoned, no matter how limited the flexible budget may be.

Keywords： sustainable supply chain     customer requirement     resilience efficiency     customer satisfaction     budget    

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On the monolayer dispersion behavior of Co3O4 on HZSM-5 support: designing applicable

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1741-1754 doi: 10.1007/s11705-023-2332-x

Abstract: Based on monolayer dispersion theory, Co3O4/ZSM-5 catalysts with different loadings have been prepared for selective catalytic reduction of nitrogen oxides by ammonia. Co3O4 can spontaneously disperse on HZSM-5 support with a monolayer dispersion threshold of 0.061 mmol 100 m–2, equaling to a weight percentage around 4.5%. It has been revealed that the quantities of surface active oxygen (O2–) and acid sites are crucial for the reaction, which can adsorb and activate NOx and NH3 reactants effectively. Below the monolayer dispersion threshold, Co3O4 is finely dispersed as sub-monolayers or monolayers and in an amorphous state, which is favorable to generate the two kinds of active sites, hence promoting the performance of ammonia selective catalytic reduction of nitrogen oxide. However, the formation of crystalline Co3O4 above the capacity is harmful to the reaction performance. 4% Co3O4/ZSM-5, the catalyst close to the monolayer dispersion capacity, possesses the most abundant active O2– species and acidic sites, thereby demonstrating the best reaction performance in all the samples. It is proposed the optimal Co3O4/ZSM-5 catalyst can be prepared by loading the capacity amount of Co3O4 onto HZSM-5 support.

Keywords： Co3O4/ZSM-5     NOx-SCR by NH3     monolayer dispersion threshold effect     surface acid sites     surface active O2– anions    

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Explicit finite element method for calculation and analysis to the elasto-plastic dynamic response of fluid-saturated porous media

LI Liang, DU Xiuli, LI Liyun, ZHAO Chenggang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 436-442 doi: 10.1007/s11709-007-0059-2

Abstract: need to solve simultaneous linear equations in each time step, so the computational effort and memory requirement

Keywords： discretization     computational     calculation     integral     requirement    

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Core designing of a new type of TVS-2M FAs: neutronics and thermal-hydraulics design basis limits

Saeed GHAEMI, Farshad FAGHIHI

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 256-278 doi: 10.1007/s11708-018-0583-x

Abstract: One of the most important aims of this study is to improve the core of the current VVER reactors to achieve more burn-up (or more cycle length) and more intrinsic safety. It is an independent study on the Russian new proposed FAs, called TVS-2M, which would be applied for the future advanced VVERs. Some important aspects of neutronics as well as thermal hydraulics investigations (and analysis) of the new type of Fas are conducted, and results are compared with the standards PWR CDBL. The TVS-2M FA contains gadolinium-oxide which is mixed with UO (for different Gd densities and U-235 enrichments which are given herein), but the core does not contain BARs. The new type TVS-2M Fas are modeled by the SARCS software package to find the PMAXS format for three states of CZP and HZP as well as HFP, and then the whole core is simulated by the PARCS code to investigate transient conditions. In addition, the WIMS-D5 code is suggested for steady core modeling including TVS-2M FAs and/or TVS FAs. Many neutronics aspects such as the first cycle length (first cycle burn up in terms of MW d/kgU), the critical concentration of boric acid at the BOC as well as the cycle length, the axial, and radial power peaking factors, differential and integral worthy of the most reactive CPS-CRs, reactivity coefficients of the fuel, moderator, boric acid, and the under-moderation estimation of the core are conducted and benchmarked with the PWR CDBL. Specifically, the burn-up calculations indicate that the 45.6 d increase of the first cycle length (which corresponds to 1.18 MW d/kgU increase of burn-up) is the best improving aim of the new FA type called TVS-2M. Moreover, thermal-hydraulics core design criteria such as MDNBR (based on W3 correlation) and the maximum of fuel and clad temperatures (radially and axially), are investigated, and discussed based on the CDBL.

Keywords： TVS-2M FAs     core design basis limits     VVER-1000     analysis     mixture of uranium-gadolinium oxides fuels     thermal-hydraulics     PARCS     WIMS-D5    

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Title Author Date Type Operation

Design and Experimental Research on a New Pipe Rupture Valve

HU Guo-liang, XU Bing, YANG Hua-yong, ZHANG Yi-ding

Journal Article

From understanding to designing soundscapes

Jian KANG

Journal Article

High-end equipment customer requirement analysis based on opinion extraction

Yuejin TAN, Yuren WANG, Xin LU, Mengsi CAI, Bingfeng GE

Journal Article

Limit of axial force ratio and requirement for stirrups of RC columns with special shape

WANG Yiqun, XU Yidong, ZHAO Yanjing, CHEN Yunxia

Journal Article

Strategies on designing multifunctional surfaces to prevent biofilm formation? ?

Yang Lu,Zhanguo Yue,Wei Wang,Zhiqiang Cao

Journal Article

Designing an

Boran Wu, Xiaoli Chai, Youcai Zhao, Xiaohu Dai

Journal Article

Analysis of suitable geometrical parameters for designing a tendon-driven under-actuated mechanical finger

Francesco PENTA,Cesare ROSSI,Sergio SAVINO

Journal Article

Cream coated on endotracheal tube with or without epidural lidocaine reduces isoflurane requirement during

Hai Yu, Qinjun Chu, Jin Liu, Li Chen, Ying Wang, Yunxia Zuo

Journal Article

The prior rules of designing Ti

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

Journal Article

Residual stresses in coating-based systems, part II: Optimal designing methodologies

ZHANG Xiancheng, WU Yixiong, XU Binshi, WANG Haidou

Journal Article

Evaluation of stray current corrosion resistance of concrete in metro construction

YANG Shucai, YANG Xu

Journal Article

Resilience strategies for sustainable supply chains under budget constraints in the post COVID-19 era

Journal Article

On the monolayer dispersion behavior of Co3O4 on HZSM-5 support: designing applicable

Journal Article

Explicit finite element method for calculation and analysis to the elasto-plastic dynamic response of fluid-saturated porous media

LI Liang, DU Xiuli, LI Liyun, ZHAO Chenggang

Journal Article

Core designing of a new type of TVS-2M FAs: neutronics and thermal-hydraulics design basis limits

Saeed GHAEMI, Farshad FAGHIHI

Journal Article