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Experimental research on the multilayer compartmental particle damper and its application methods on long-period

Zhenyuan LUO, Weiming YAN, Weibing XU, Qinfei ZHENG, Baoshun WANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 751-766 doi: 10.1007/s11709-018-0509-z

Abstract: To introduce particle damping technology to long-period structure seismic control, a novel multilayercompartmental particle damper (MCPD) was proposed, and a 1/20 scale test model of a typical long-periodThe results showed that the seismic responses of the flexible or semi-flexible bridge towers of long-periodA well-designed MCPD can achieve significant damping for long-period structures under seismic excitationsapplication of MCPDs for seismic control of single-tower self-anchored suspension bridges and other long-period

Keywords： devices     multilayer compartmental particle damper     self-anchored suspension bridges     shaking tables test     long-periodstructure     seismic control    

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Using hydrochemical signatures to characterize the long-period evolution of groundwater information in

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-021-1393-7

Abstract:

• The long-period groundwater evolution was identified by hydrochemical

Keywords： Groundwater quality     Hydrochemical signatures     Spatial-temporal variations     Water-rock interactions     Anthropogenic interventions    

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Influence of fluid-structure interaction on vortex induced vibration and lock-in phenomena in long span

Nazim Abdul NARIMAN

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4,   Pages 363-384 doi: 10.1007/s11709-016-0353-y

Abstract: stayed bridge are generated in ABAQUS-finite element program once using only CFD model (one-way fluid-structureinteraction) and another by using both the CFD model and the CSD model together (two-way fluid-structurelower critical wind velocities and lock-in phenomena will appear at lower natural frequencies of the longThis helps the designers to efficiently plan and consider for the design and safety of the long span

Keywords： vortex-induced vibration     fluid-structure interaction     Strouhal number     lock-in     kinetic energy    

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Effect of UAV prewetting application during the flowering period of cotton on pesticide droplet deposition

Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 4,   Pages 455-461 doi: 10.15302/J-FASE-2018232

Abstract: was studied, focusing on the effects of pesticide deposition on cotton leaves during the flowering period

Keywords： aerial spray     cotton     deposition     flowering period     leaf angle     prewetting     UAV    

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Mechanism design of reverse auction on concession period and generalized quality for PPP projects

Xianjia WANG, Shiwei WU

Frontiers of Engineering Management 2017, Volume 4, Issue 2,   Pages 156-170 doi: 10.15302/J-FEM-2017016

Abstract: PPP projects usually require the bid to specify several characteristics of quality and the concession periodmodel of a PPP project can be replaced by a two-dimensional direct mechanism based on the concession periodgeneralized quality requirements of such a mechanism, considering the influence of a variable investment structure

Keywords： PPP project     reverse auction     mechanism design     multidimensional information     scoring function     two-stage bidding    

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Analysis on Ways of Guaranteeing the Safety of Civil Structures in Traffic Systems during Long Service

Qian Yongjiu and Du Yanliang

Strategic Study of CAE 2017, Volume 19, Issue 6,   Pages 6-11 doi: 10.15302/J-SSCAE-2017.06.002

Abstract: fields at home and abroad, discusses ways to guarantee the safety of the major civil structures during long

Keywords： civil structure     long life     safety     evaluation     management    

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A novel period estimation method for X-ray pulsars based on frequency subdivision

Li-rong SHEN,Xiao-ping LI,Hai-feng SUN,Hai-yan FANG,Meng-fan XUE

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 10,   Pages 858-870 doi: 10.1631/FITEE.1500052

Abstract: Period estimation of X-ray pulsars plays an important role in X-ray pulsar based navigation (XPNAV).The fast Lomb periodogram is suitable for period estimation of X-ray pulsars, but its performance infrequency subdivision and the continuous Lomb periodogram (CLP) is proposed to improve precision of periodFinally, a refined period is achieved by calculating the CLP in the obtained frequencies.Furthermore, the proposed method performs better than efsearch (a period estimation method of HEAsoft

Keywords： Pulsar navigation     Period estimation     Frequency subdivision     Continuous Lomb periodogram    

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Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)

Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 1,   Pages 44-59 doi: 10.1007/s11465-015-0360-z

Abstract: This paper also includes a review of more than 160 papers in Russian for the period of 1935–1975The main features and achievements during this period are also considered.The diagrams also show the following aspects: 1) The most popular and important themes in a specific period

Keywords： theory of gearing (TG)     gear geometry     generating surface     gear synthesis     gear analysis    

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Quasi-period Changes of the Operational Parameters for Hot Oil Pipelines

Cui Hui

Strategic Study of CAE 2006, Volume 8, Issue 1,   Pages 51-53

Abstract:

Subjected to the annual changes of the air temperature, the quasi-period rules of the operational

Keywords： hot oil pipeline     air temperature     soil environment     quasi-period    

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Short-term effect of temperature variation on the competition between PAOs and GAOs during acclimation period

Nanqi REN, Han KANG, Xiuheng WANG, Nan LI

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 277-282 doi: 10.1007/s11783-010-0226-x

Abstract: Sequencing batch reactor (SBR) for enhanced biological phosphorus removal (EBPR) processes was used to investigate the impact of the temperature shock on the competition between phosphorus-accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) in start-up stage. During the 34 days operation, SBR was set with temperature variation(0–5 d, 22±1°C; 6–13 d, 29±1°C; 14–34 d, 14±1°C). PAOs and GAOs were analyzed by fluorescent in situ hybridization (FISH), and intracellular polyphosphate granules were stained by Neisser-stain. The results showed that the influence of temperature shock on PAOs’ abundance was more serious than that on GAOs in the enriching process. Under sudden and substantially temperature variation, from 22±1°C to 29±1°C and then to 14±1°C, the domination of PAOs was deteriorated. After temperature shock, PAOs’ competitive advantages at low temperature that concluded in other study did not appear in our study. As mesophilic, GAOs (indicated by and ) were more temperature adaptive and better grew and took the domination at 14±1°C in the end. In the competition process, organisms of tetrad forming organisms (TFOs)-like shape which were considered as typical GAOs, were observed. With the evidence of poly-P granules containing by Neisser-straining and result of FISH, these organisms of TFOs-like shape were better to be assumed as adaption state or a special self-protecting shape of PAOs.

Keywords： fluorescent in situ hybridization (FISH)     tetrad forming organisms (TFOs)     temperature variation     enhanced biological phosphorus removal (EBPR)    

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Long-term prediction for hierarchical-B-picture-based coding of video with repeated shots None

Xu-guang ZUO, Lu YU

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 3,   Pages 459-470 doi: 10.1631/FITEE.1601552

Abstract: Particularly, by exploiting the hierarchical B-picture prediction structure, temporal redundancy amongAccording to our observations, when these videos are encoded by HEVC with the hierarchical B-picture structureWe propose a long-term prediction (LTP) scheme to use the long-term temporal correlation between correlatedthe representative frames, and a modified hierarchical B-picture coding structure based on an LTR frameis introduced to support long-term temporal prediction.

Keywords： High Efficiency Video Coding (HEVC)     Long-term temporal correlation     Long-term prediction     HierarchicalB-picture structure    

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analysis in conventional and organic rice production systems and organic scenarios in the transition period

Hamed MANSOORI, Parviz Rezvani MOGHADDAM, Rooholla MORADI

Frontiers in Energy 2012, Volume 6, Issue 4,   Pages 341-350 doi: 10.1007/s11708-012-0206-x

Abstract: scenarios were designed to predict the changes of energy budget and economic analysis in the transition periodIncrease in energy efficiency and productivity was predicted for the transition period but decrease trendin economic indexes was projected for this period in all scenarios.was that the market price of organic rice was the same as that of conventional rice in the transition period

Keywords： energy efficiency     specific energy     net return     Cobb-Douglas function    

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Risk assessment on Bohai Bay subsea tunnel in its operational period

Wang Yonghong,Liu Bing,Zhang Yonggang

Strategic Study of CAE 2013, Volume 15, Issue 12,   Pages 107-112

Abstract:

The operation of super-long subsea tunnel is a extremly complex system

Keywords： subsea tunnel     operational period     risk analysis     risk assessment    

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Short-Range Current Velocity Records to Apply in the Reference Period for Sutong Bridge

Su Hui,Gong Weiming,Liang Shuting

Strategic Study of CAE 2006, Volume 8, Issue 7,   Pages 42-46

Abstract:

The current velocity of reference period is determined by the local primitive data.A method is introduced to determine the current velocity of reference period through short-range currentvelocity records for the area that lacks of long-range current velocity records.Presuming the extreme value by way of minority sample，the current velocity of reference period is calculated.Correlation

Keywords： short-range records     the current velocity of reference period     correlation analysis     regression equation    

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Research on depth of earth cover for shield tunnel anti-buoyancy security

Liu Xueyan,Yuan Dajun and Jiang Xi

Strategic Study of CAE 2015, Volume 17, Issue 1,   Pages 88-95

Abstract:

The depth of earth cover for tunnel anti-buoyancy security during construction and operation was analyzed in this paper with theoretical and numerical methods. The principles and theoretical analysis methods were proposed for it. The formula of depth of earth cover for anti-buoyancy security of tunnel during construction was given for the first time. It involves the unfavorable factors， such as uncondensed mortar， the favorable factors， such as resistances of soil and segments. The weight of earth cover for tunnel was suggested to consider as unique factor for tunnel security during operation. The eroded depth for design should be considered for tunnel influenced by floods. It has provided some references for longitudinal section design of the tunnel in construction under the Yangzi River in Nanjing. And it also provided theoretical foundation for the set depth of earth cover for anti-buoyancy security of other shield tunnels under river or sea.

Keywords： anti-buoyancy security； tunnel construction period； tunnel operation period； depth of earth cover    

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Title Author Date Type Operation

Experimental research on the multilayer compartmental particle damper and its application methods on long-period

Zhenyuan LUO, Weiming YAN, Weibing XU, Qinfei ZHENG, Baoshun WANG

Journal Article

Using hydrochemical signatures to characterize the long-period evolution of groundwater information in

Journal Article

Influence of fluid-structure interaction on vortex induced vibration and lock-in phenomena in long span

Nazim Abdul NARIMAN

Journal Article

Effect of UAV prewetting application during the flowering period of cotton on pesticide droplet deposition

Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN

Journal Article

Mechanism design of reverse auction on concession period and generalized quality for PPP projects

Xianjia WANG, Shiwei WU

Journal Article

Analysis on Ways of Guaranteeing the Safety of Civil Structures in Traffic Systems during Long Service

Qian Yongjiu and Du Yanliang

Journal Article

A novel period estimation method for X-ray pulsars based on frequency subdivision

Li-rong SHEN,Xiao-ping LI,Hai-feng SUN,Hai-yan FANG,Meng-fan XUE

Journal Article

Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)

Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA

Journal Article

Quasi-period Changes of the Operational Parameters for Hot Oil Pipelines

Cui Hui

Journal Article

Short-term effect of temperature variation on the competition between PAOs and GAOs during acclimation period

Nanqi REN, Han KANG, Xiuheng WANG, Nan LI

Journal Article

Long-term prediction for hierarchical-B-picture-based coding of video with repeated shots

Xu-guang ZUO, Lu YU

Journal Article

analysis in conventional and organic rice production systems and organic scenarios in the transition period

Hamed MANSOORI, Parviz Rezvani MOGHADDAM, Rooholla MORADI

Journal Article

Risk assessment on Bohai Bay subsea tunnel in its operational period

Wang Yonghong,Liu Bing,Zhang Yonggang

Journal Article

Short-Range Current Velocity Records to Apply in the Reference Period for Sutong Bridge

Su Hui,Gong Weiming,Liang Shuting

Journal Article

Research on depth of earth cover for shield tunnel anti-buoyancy security

Liu Xueyan,Yuan Dajun and Jiang Xi

Journal Article