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Journal Article 603

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optimization 76

multi-objective optimization 24

genetic algorithm 20

topology optimization 19

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design optimization 6

optimization design 6

particle swarm optimization 6

uncertainty 6

robust design 5

sensitivity analysis 5

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Solving topology optimization problems by the Guide-Weight method

Xinjun LIU, Zhidong LI, Liping WANG, Jinsong WANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 1,   Pages 136-150 doi: 10.1007/s11465-010-0126-6

Abstract:

Finding a good solution method for topology optimization problems is always paid attention to by theGuide-Weight method, proposed first by Chen in 1980s, was effectively and successfully used in antennastructures’ optimization.When the Guide-Weight method is applied into topology optimization, it works very well with unified andtopology optimization solved by the Guide-Weight method combining with SIMP method are presented; subsequently

Keywords： Guide-Weight method     topology optimization     SIMP method    

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Multiobjective trajectory optimization of intelligent electro-hydraulic shovel

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0706-2

Abstract: In this paper, a multiobjective trajectory optimization approach that sets energy consumption, executionevolutionary algorithm based on decomposition is proposed to deal with this constrained multiobjective optimizationFinally, the entropy weight technique for order preference by similarity to an ideal solution methodproposed approach can provide the high-quality Pareto optimal solutions and outperforms other trajectory optimization

Keywords： trajectory planning     electro-hydraulic shovel     cubic polynomial S-curve     multiobjective optimization     entropy weight technique    

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Instantaneous deflection of light-weight concrete slabs

Behnam VAKHSHOURI, Shami NEJADI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4,   Pages 412-423 doi: 10.1007/s11709-017-0416-8

Abstract: An experimental investigation is performed on four simply supported Light-Weight Concrete (LWC) one-way

Keywords： instantaneous deflection     light-weight concrete     expanded polystyrene     effective moment of inertia     cracking    

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Modular design of typical rigid links in parallel kinematic machines: Classification and topology optimization

Xinjun LIU, Xiang CHEN, Zhidong LI

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 2,   Pages 199-209 doi: 10.1007/s11465-012-0315-6

Abstract: structures with best mechanical performances is analyzed and processed in two steps: classification and optimizationNext, the technology method and the iterative formula derivation process of topology optimization areeach group of classified ones are set up and their optimal structures are achieved through topology optimization

Keywords： parallel kinematic machines (PKMs)     modular design     classification     topology optimization and improved Guide-Weight    

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Characterization of soil low-molecular-weight organic acids in the Karst rocky desertification region

Xiaoliang LI, Xiaomin CHEN, Xia LIU, Lianchuan ZHOU, Xinqiang YANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 195-203 doi: 10.1007/s11783-012-0391-1

Abstract: Soil low-molecular-weight (LMW) organic acids play important roles in the soil-forming process and the

Keywords： Karst rocky desertification     low-molecular-weight (LMW) organic acids     distribution characteristics     soil    

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Prediction of falling weight deflectometer parameters using hybrid model of genetic algorithm and adaptive

Frontiers of Structural and Civil Engineering   Pages 812-826 doi: 10.1007/s11709-023-0940-7

Abstract: A falling weight deflectometer is a testing device used in civil engineering to measure and evaluate

Keywords： falling weight deflectometer     modulus of subgrade reaction     elastic modulus     metaheuristic algorithms    

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A Full-Scale Optimization of a Crop Spatial Planting Structure and Its Associated Effects Article

Qi Liu, Jun Niu, Taisheng Du, Shaozhong Kang

Engineering 2023, Volume 28, Issue 9,   Pages 139-152 doi: 10.1016/j.eng.2023.03.012

Abstract: text-align: justify;">Driven by the concept of agricultural sustainable development, crop planting structure optimizationHowever, traditional optimization of crop planting structures often ignores the impact on regional foodThrough an entropy weight technique for order preference by similarity to an ideal solution (TOPSIS)While sacrificing reasonable regional economic benefits, the optimization of the planting structure significantly

Keywords： Planting structure optimization     Full-scale evaluation index system     Water footprint     SWAT-WF module     Interprovincial food trade     Entropy weight TOPSIS    

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Evaluation of ICUs and weight of quality control indicators: an exploratory study based on Chinese ICU

Frontiers of Medicine 2023, Volume 17, Issue 4,   Pages 675-684 doi: 10.1007/s11684-022-0970-x

Abstract: exploratory factor analysis was applied, the 15 indicators were divided into 6 core elements that varied in weightwill help in assessing the key elements of quality management and establish a foundation for further optimization

Keywords： critical care medicine     quality control     evaluation     exploratory factor analysis (EFA) model    

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Uncovering the effect of poly(ethylene-co-vinyl alcohol) molecular weight and vinyl alcohol content on

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1484-1502 doi: 10.1007/s11705-023-2331-y

Abstract: Various hydrophilic poly(ethylene-co-vinyl alcohol) (EVOH) were used herein to precisely control the structure and hydrodynamic properties of polysulfone (PSF) membranes. Particularly, to prepare pristine PSF and PSF/EVOH blends with increasing vinyl alcohol (VOH: 73%, 68%, 56%), the non-solvent-induced phase separation (NIPS) technique was used. Polyethylene glycol was used as a compatibilizer and as a porogen in N,N-dimethylacetamide. Rheological and ultrasonic separation kinetic measurements were also carried out to develop an ultrafiltration membrane mechanism. The extracted membrane properties and filtration capabilities were systematically compared to the proposed mechanism. Accordingly, the addition of EVOH led to an increase in the rheology of the dopes. The resulting membranes exhibited a microporous structure, while the finger-like structures became more evident with increasing VOH content. The PSF/EVOH behavior was changed from immediate to delayed segregation due to a change in the hydrodynamic kinetics. Interestingly, the PSF/EVOH32 membranes showed high hydrophilicity and achieved a pure water permeability of 264 L·m–2·h–1·bar–1, which was higher than that of pure PSF membranes (171 L·m–2·h–1·bar–1). In addition, PSF/EVOH32 rejected bovine serum albumin at a high rate (> 90%) and achieved a significant restoration of permeability. Finally, from the thermodynamic and hydrodynamic results, valuable insights into the selection of hydrophilic copolymers were provided to tailor the membrane structure while improving both the permeability and antifouling performance.

Keywords： polysulfone     blend modification     ultrafiltration membrane     formation hydrodynamics     poly(ethylene-co-vinyl alcohol) copolymer    

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Low-carbohydrate diets lead to greater weight loss and better glucose homeostasis than exercise: a randomized

Frontiers of Medicine 2021, Volume 15, Issue 3,   Pages 460-471 doi: 10.1007/s11684-021-0861-6

Abstract: After the interventions, LCD led to a larger weight loss than EX (−3.56±0.37 kg vs. −1.24±0.39 kg, weight loss and glucose homeostasis in people

Keywords： low-carbohydrate diet     obesity     nonalcoholic fatty liver disease     continuous glucose monitoring     mean sensor glucose    

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Computation model for corrosion resistance of nanocrystalline zircaloy-4

ZHANG Xiyan, ZHU Yutao, LIU Qing, LUAN Baifeng, HUANG Guangjie, LI Cong, ZHANG Xiyan, SHI Minghua, LIU Nianfu, ZHANG Xiyan, LI Cong

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 386-389 doi: 10.1007/s11708-008-0102-6

Abstract: The results show that the corrosion rate constant and weight gain of nanocrystalline zircaloy-4 decreasewith the decrease of grain size, and that the corrosion weight gain of nanocrystalline zircaloy-4 is

Keywords： corrosion     constant     corrosion weight     weight     influence    

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Investigation on a cylindrical ultrasonic micromotor

ZHU Hua, CHEN Chao, ZHAO Chunsheng

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 394-398 doi: 10.1007/s11465-007-0068-9

Abstract: The prototype motor is 5 mm in diameter, 30 mm in length and 4.2 g in weight.This micromtor is 2 mm in diameter, 7 mm in length and 0.258 g in weight.

Keywords： coefficient     bending     kHz     suitable     weight    

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Effects of molecular weight and concentration of carboxymethyl cellulose on morphology of hydroxyapatite

Ruiqiang LIU,Rattan LAL

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5,   Pages 804-812 doi: 10.1007/s11783-015-0785-y

Abstract: Nano-sized apatite particles (nAP) synthesized with carboxymethyl cellulose (CMC) have shown great application potentials in in situ heavy metal remediation. However, differences in CMC’s properties effects on the size of nAP produced are not well understood. In this paper, two types of CMC, with respective molecular weights (MW) of ~120000 and ~240000 Dalton or respective polymerization degrees of 500 (CMC-500) and 1050 (CMC-1050), were studied in a concentration range of 0.05%–0.5% (w/w) for nAP synthesis. Morphology of the particles was characterized with transmission electron microscopy (TEM). Results showed that 0.05% CMC-500 solution gave an average particle size of 148.7±134.9 nm, 0.25% CMC-500 solution produced particles of 21.8±20.4 nm, and, 0.5% CMC-500 solution contained particles of 15.8±7.7 nm. In comparison, 0.05% CMC-1050 solution produced nanoparticles of 6.8±3.2 nm, 0.25% CMC-1050 produced smaller nAP of 4.3±3.2 nm, and 0.5% CMC-1050 synthesized the smallest nanoparticles in this study, with an average diameter of 3.0±2.1 nm. Chemical composition of the products was identified with X-ray diffraction (XRD) as pure hydroxyapatite. Interactions between nAP and CMC were discussed with help of attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopic data. This study showed that CMC at higher concentration as well as higher MW facilitated to produce finer nanoparticles, showing that nAP size could be manipulated by selecting appropriate CMC MW and/or applying appropriate CMC concentration.

Keywords： nanotechnology     nanoparticles     apatite     carboxymethyl cellulose (CMC)     particle size    

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Enhancement of sludge gravitational thickening with weak ultrasound

Panyue ZHANG, Tian WAN, Guangming ZHANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 753-760 doi: 10.1007/s11783-011-0368-5

Abstract: Gravitational thickening is the prevailing method to reduce sludge volume but the process is slow and usually requires addition of polyelectrolyte(s). This paper investigated the potential benefits of sonication on enhancing the sludge gravitational thickening with very low energy dose, so called “weak ultrasound”. Results showed that weak sonication significantly changed the sludge settlability and the main mechanism was release of the loosely bounded extracellular polymeric substances. The changes in sludge behaviors by sonication were strongly influenced by power density and sonication duration. Lower sound frequency was slightly better than higher frequency. Weak sonication (<680 kJ·kg DS) improved the sludge gravitational thickening while high ultrasonic energy deteriorated the process. Considering both the sludge thickening efficiency and energy consumption, the optimum conditions were 0.15 W·mL , 7 s, and 25 kHz. Under such conditions, the energy dose was only 155 kJ·kg DS, much lower than literature reports, and the sludge settling time was shortened from 24 h to 12?h. Weak sonication could substitute expensive polyelectrolyte coagulant for sludge thickening. Combination of weak sonication and polyelectrolyte could further reduce the settling time to 6 h. The final water content of the thickened sludge was not changed after sonication or polyelectrolyte addition.

Keywords： activated sludge     sonication     settlability     dry weight     extracellular polymeric substances     polyelectrolyte    

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vanbaalenii PYR-1 endowed with an enhanced activity of dihydroxylation of high-molecular-weight

Yiquan Wu, Ying Xu, Ningyi Zhou

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1193-5

Abstract: . • Both NidA3B3 and FNidA3B3 catalyze high-molecular-weight PAHs dihydroxylation. • NidA3B3 shows anNidA3B3 is a terminal dioxygenase whose favorable substrates are high-molecular-weight polyaromatic hydrocarbons

Keywords： Biodegradation     polyaromatic hydrocarbons     biotransformation     ring-hydroxylating dioxygenase system    

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Title Author Date Type Operation

Solving topology optimization problems by the Guide-Weight method

Xinjun LIU, Zhidong LI, Liping WANG, Jinsong WANG

Journal Article

Multiobjective trajectory optimization of intelligent electro-hydraulic shovel

Journal Article

Instantaneous deflection of light-weight concrete slabs

Behnam VAKHSHOURI, Shami NEJADI

Journal Article

Modular design of typical rigid links in parallel kinematic machines: Classification and topology optimization

Xinjun LIU, Xiang CHEN, Zhidong LI

Journal Article

Characterization of soil low-molecular-weight organic acids in the Karst rocky desertification region

Xiaoliang LI, Xiaomin CHEN, Xia LIU, Lianchuan ZHOU, Xinqiang YANG

Journal Article

Prediction of falling weight deflectometer parameters using hybrid model of genetic algorithm and adaptive

Journal Article

A Full-Scale Optimization of a Crop Spatial Planting Structure and Its Associated Effects

Qi Liu, Jun Niu, Taisheng Du, Shaozhong Kang

Journal Article

Evaluation of ICUs and weight of quality control indicators: an exploratory study based on Chinese ICU

Journal Article

Uncovering the effect of poly(ethylene-co-vinyl alcohol) molecular weight and vinyl alcohol content on

Journal Article

Low-carbohydrate diets lead to greater weight loss and better glucose homeostasis than exercise: a randomized

Journal Article

Computation model for corrosion resistance of nanocrystalline zircaloy-4

ZHANG Xiyan, ZHU Yutao, LIU Qing, LUAN Baifeng, HUANG Guangjie, LI Cong, ZHANG Xiyan, SHI Minghua, LIU Nianfu, ZHANG Xiyan, LI Cong

Journal Article

Investigation on a cylindrical ultrasonic micromotor

ZHU Hua, CHEN Chao, ZHAO Chunsheng

Journal Article

Effects of molecular weight and concentration of carboxymethyl cellulose on morphology of hydroxyapatite

Ruiqiang LIU,Rattan LAL

Journal Article

Enhancement of sludge gravitational thickening with weak ultrasound

Panyue ZHANG, Tian WAN, Guangming ZHANG

Journal Article

vanbaalenii PYR-1 endowed with an enhanced activity of dihydroxylation of high-molecular-weight

Yiquan Wu, Ying Xu, Ningyi Zhou

Journal Article