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Study on a kind of new strengthening buffer operators and numerical simulations

Cui Jie,Dang Yaoguo,Liu Sifeng,Xie Naiming

Strategic Study of CAE 2010, Volume 12, Issue 2,   Pages 108-112

Abstract: >According to the theory of prior using of new information,based on the research of already existed strengtheningbuffer operators, some new strengthening buffer operators are established.The flaw that the existing strengthening buffer operators can,t fully use new information of the dataAn example simulation shows, compared with the existing strengthening buffer operators, the kind of newstrengthening buffer operators increases the forecast precision of GM(1,1) remarkably.

Keywords： operator     strengthening buffer operator     geometry average strengthening operator     GM(1     1)    

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Buffer capacity of granular matter to impact of spherical projectile based on discrete element method

Ying YAN, Pengfei LI, Shunying JI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 50-54 doi: 10.1007/s11709-013-0186-x

Abstract: Granular matter possesses impact-absorbing property due to its energy dissipation character. To investigate the impact-absorbing capacity of granular matter, the discrete element method (DEM) is adopted to simulate the impact of a spherical projectile on to a granular bed. The dynamic responses of the projectile are obtained for both thin and thick granular bed. The penetration depth of the projectile and the first impact peak are investigated with different bed thicknesses and impact velocities. Determining a suitable bed thickness is crucial to the buffering effect of granular matter. The first impact peak is independent of bed thickness when the thickness is larger than the critical thickness.

Keywords： granular matter     impact peak     buffer capacity     discrete element method     critical thickness    

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Trapezoidal Intuitionistic Fuzzy Aggregation Operator Based on Choquet Integral and Its Application to

Xi-hua Li,Xiao-hong Chen

Frontiers of Engineering Management 2015, Volume 2, Issue 3,   Pages 266-276 doi: 10.15302/J-FEM-2015048

Abstract: In this paper, a trapezoidal intuitionistic fuzzy aggregation operator based on the Choquet integralA trapezoidal intuitionistic fuzzy aggregation operator based on the Choquet integral is then definedmulti-criteria decision-making method based on a trapezoidal intuitionistic fuzzy Choquet integral operator

Keywords： decision making     trapezoidal intuitionistic fuzzy numbers     Choquet integral     fuzzy measure     aggregation operator    

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Restoring soil health to reduce irrigation demand and buffer the impacts of drought

Rebecca SCHNEIDER, Stephen MORREALE, Zhigang LI, Erin MENZIES PLUER, Kirsten KURTZ, Xilu NI, Cuiping WANG, Changxiao LI, Harold VAN ES

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 3,   Pages 339-346 doi: 10.15302/J-FASE-2020348

Abstract:

Irrigation consumes three quarters of global water withdrawals each year. Strategies are needed to reduce irrigation water use, including increasing the efficiency of transfer methods and field application. Comprehensive restoration of soil health, specifically through organic matter amendments, can substantially reduce irrigation demand and increase crop yield. A program to restore severely degraded and desertified soils by incorporating coarse woodchips into the soil successfully increased rainfall capture and elevated soil moisture for several weeks between rainfall events at both Ningxia, north-west China and North Dakota, USA. With addition of fertilizer, woodchip incorporation further increased growth of wheat and alfalfa. Comprehensive soil health assessment of remnant grasslands was used to develop target reference soil profiles by which to guide restoration efforts. Given that most agricultural soils are degraded to some degree, soil health restoration can provide a powerful strategy toward achieving global food and water security.

Keywords： drought     irrigation     restoration     soil health     woodchips    

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Strengthening of reinforced concrete beams using fiber-reinforced cementitious matrix systems fabricated

Frontiers of Structural and Civil Engineering   Pages 1100-1116 doi: 10.1007/s11709-023-0967-9

Abstract: The behavior of this system is evaluated in terms of both the flexural and shear strengthening of reinforcedEight beams are designed to assess the effectiveness of the FRCM system in terms of flexural strengtheningThe parameters investigated for flexural strengthening are the number of layers, span/depth ratio, andthe strengthening method.In the shear-strengthened specimens, the effects of the span/depth ratio and strengthening system type

Keywords： fiber-reinforced cementitious matrix     flexural strengthening     shear strengthening     carbon fiber-reinforced    

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Shear strength model of the reinforced concrete beams with embedded through-section strengthening bars

Linh Van Hong BUI; Phuoc Trong NGUYEN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 843-857 doi: 10.1007/s11709-022-0834-0

Abstract: compressive strength of concrete, stiffness ratio between ETS bars and steel stirrups, and use of ETS strengtheningA promising method based on the bond mechanism between ETS strengthening and concrete is then proposed

Keywords： embedded through-section     strengthening     fiber-reinforced polymer     finite element     shear strength model    

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STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 503-509 doi: 10.15302/J-FASE-2023528

Abstract:

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Keywords： GREEN     AGRICULTURAL     PROMOTE     POLLUTION     SOURCE     DEVELOPMENT     POINT     STRENGTHENING     CONTROL    

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Landing control method of a lightweight four-legged landing and walking robot

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0707-1

Abstract: compliance control is proposed to solve the critical problem of impact energy dissipation to realize buffer

Keywords： landing and walking robot     lunar exploration     buffer landing     compliance control    

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Comprehensive strengthening mechanism of steel based on nano scale cementite precipitates

Fu Jie,Li Guangqiang,Yu Yueguang,Mao Xinping,Fang Keming

Strategic Study of CAE 2011, Volume 13, Issue 1,   Pages 31-42

Abstract:

This paper summarized the status of comprehensive strengthening mechanismTiC, which can not be ignored.The precipitation strengthening contributions of nano-scale precipitatesand grain refinement strengthening.A formula for calculate the yield strength of low carbon steel isproposed, and the calculated yield strength considering the precipitation strengthening contributionsThe reason for grain refinement strengthening can not directly plus dislocation strengthening and the

Keywords： yield strength     nano-scale cementite     nano-scale titanium carbide     precipitation strengthening     comprehensivestrengthening of steel    

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Properties of a general quaternion-valued gradient operator and its applications to signal processing

Meng-di Jiang, Yi Li, Wei Liu,w.liu@sheffield.ac.uk

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 2,   Pages 83-95 doi: 10.1631/FITEE.1500334

Abstract: To generalize the operator to nonlinear functions, we define a restricted version of the HR operator

Keywords： Quaternion     Gradient operator     Signal processing     Least mean square (LMS) algorithm     Nonlinear adaptive    

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Experimental monitoring of the strengthening construction of a segmental box girder bridge and field

Ali Fadhil NASER, Zonglin WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 308-320 doi: 10.1007/s11709-012-0140-3

Abstract: Prestressed concrete segmental box girder bridges are composed of short concrete segments that are either precast or cast in situ and then joined together by longitudinally post-tensioning internal, external, or mixed tendons. The objectives of this study are to monitor the construction process of the external prestressing tendons to strengthen the bridge structure and perform a field load test to measure the strain and the deflection of the anchorage devices of the external prestressing tendons to determine the state of these devices after tension forces are applied. The monitoring process of the external prestressing tendons construction includes inspecting the cracks in the diaphragm anchorage and the deviation block devices before the tension forces are applied to the external tendons; measuring the deformation of the steel deviation cross beam during the tension process; measuring the deformation of the box girder after different levels of tension forces are applied; measuring the elongation of the external tendons in each level of the tension; and measuring the natural frequency of the external tendons after the tension process is complete. The results of the monitoring process show that the measured values of the deformation, the elongation, and the natural frequency meet the requirements. Therefore, there is no damage during the construction and the tensioning of the external prestressing tendons. A field load test is performed to the anchorage beam, the steel deviation block devices, and the steel deviation cross beam. The field load test results of the anchorage devices show that the values of the strains, the stresses, and the deflection are less than the respective allowable limit values in the requirements. Therefore, the anchorage devices have sufficient strength, and the working state is good after the tension forces are applied to the external prestressing tendons.

Keywords： prestressed concrete     box girder     monitoring     external tendons     strain     deflection    

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Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 145-160 doi: 10.1007/s11709-022-0806-4

Abstract: The findings of this study indicate that the sprayable strain-hardening FRCC has a good potential for strengthening

Keywords： strain-hardening cementitious composites     engineered cementitious composites     sprayable     shotcrete     strengthening    

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New progress in study of the technology of strengthening structures with prestressed fiber reinforced

Lu Yiyan,Chen Juan,Huang Yinshen,Wu Tao

Strategic Study of CAE 2008, Volume 10, Issue 8,   Pages 40-44

Abstract:

The application of fiber reinforced plastics (FRP) in strengthening projectsPractices and theories have testified that the technology of strengthening structures with prestressedA concise state-of-the-art survey and new progress of the technology of strengthening structures withprestressed FRP are presented, including studies in terms of concrete structures strengthening withprestressed FRP, steel structures strengthening with prestressed FRP and the key problems in its practical

Keywords： fiber reinforced plastics     strengthening technology     concrete structures     steel structures     research    

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Calculation of diagonal section and cross-section bending capacity for strengthening RC structure using

Shouping SHANG , Fangyuan ZHOU , Wei LIU ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 330-338 doi: 10.1007/s11709-009-0046-x

Abstract: structures nationwide, as well as the rapid development of innovative building materials, the adoption of strengtheningHigh-performance ferrocement laminate (HPFL) is an effective method of strengthening concrete structureThis paper introduces the formula of cross-section bending capacity for strengthening concrete beams

Keywords： RC beams     high-performance ferrocement laminate (HPFL)     inorganic material     reinforcement    

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Strengthening and Softening of Ferrite+Pearlite Steels Produced by Thin Slab Casting and Rolling

Fu Jie,Wu Huajie,Liu Yangchun

Strategic Study of CAE 2008, Volume 10, Issue 4,   Pages 65-72

Abstract:

Based on the principle of the integrated strengthening of steel, thestrengthening and the softening of HSLC steel have been studied by controlling the precipitation of carbon

Keywords： HSLC steel     strengthening     softening     basal plate for cold rolling     super steel    

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Title Author Date Type Operation

Study on a kind of new strengthening buffer operators and numerical simulations

Cui Jie,Dang Yaoguo,Liu Sifeng,Xie Naiming

Journal Article

Buffer capacity of granular matter to impact of spherical projectile based on discrete element method

Ying YAN, Pengfei LI, Shunying JI

Journal Article

Trapezoidal Intuitionistic Fuzzy Aggregation Operator Based on Choquet Integral and Its Application to

Xi-hua Li,Xiao-hong Chen

Journal Article

Restoring soil health to reduce irrigation demand and buffer the impacts of drought

Rebecca SCHNEIDER, Stephen MORREALE, Zhigang LI, Erin MENZIES PLUER, Kirsten KURTZ, Xilu NI, Cuiping WANG, Changxiao LI, Harold VAN ES

Journal Article

Strengthening of reinforced concrete beams using fiber-reinforced cementitious matrix systems fabricated

Journal Article

Shear strength model of the reinforced concrete beams with embedded through-section strengthening bars

Linh Van Hong BUI; Phuoc Trong NGUYEN

Journal Article

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Journal Article

Landing control method of a lightweight four-legged landing and walking robot

Journal Article

Comprehensive strengthening mechanism of steel based on nano scale cementite precipitates

Fu Jie,Li Guangqiang,Yu Yueguang,Mao Xinping,Fang Keming

Journal Article

Properties of a general quaternion-valued gradient operator and its applications to signal processing

Meng-di Jiang, Yi Li, Wei Liu,w.liu@sheffield.ac.uk

Journal Article

Experimental monitoring of the strengthening construction of a segmental box girder bridge and field

Ali Fadhil NASER, Zonglin WANG

Journal Article

Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Journal Article

New progress in study of the technology of strengthening structures with prestressed fiber reinforced

Lu Yiyan,Chen Juan,Huang Yinshen,Wu Tao

Journal Article

Calculation of diagonal section and cross-section bending capacity for strengthening RC structure using

Shouping SHANG , Fangyuan ZHOU , Wei LIU ,

Journal Article

Strengthening and Softening of Ferrite+Pearlite Steels Produced by Thin Slab Casting and Rolling

Fu Jie,Wu Huajie,Liu Yangchun

Journal Article