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Estimation of photolysis half-lives of dyes in a continuous-flow system with the aid of quantitative structure-property relationship

Davoud BEIKNEJAD,Mohammad Javad CHAICHI

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5,   Pages 683-692 doi: 10.1007/s11783-014-0680-y

Abstract: relationship (QSPR) study was carried out using 21 descriptors based on different chemometric tools including stepwisemultiple linear regression (MLR) and partial least squares (PLS) for the prediction of the photolysis

Keywords： dye     photolysis half-life     quantitative structure-property relationship     continuous-flow     stepwise multiple    

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A stepwise process for carbon dioxide sequestration using magnesium silicates

Johan FAGERLUND, Experience NDUAGU, Ron ZEVENHOVEN, Inês ROMÃO,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 2,   Pages 133-141 doi: 10.1007/s11705-009-0259-5

Abstract: This work involves the production of magnesium in the form of Mg(OH) from serpentinite rock (nickel mine tailing) material followed by conversion into MgCO using a pressurised fluidised bed (PFB) reactor operating at 400°C–600°C and pressures up to 2.85MPa. Our approach is rooted in the thermodynamic fact that the reaction between Mg(OH) and gaseous CO forming MgCO and water releases significant amounts of heat. The main problem is, however, the chemical kinetics; the reaction is slow and has to be accelerated in order to be used in an economically viable process for large-scale (~1Mt/a) CO sequestration. We have constructed a lab-scale PFB reactor test-setup for optimising the carbonation reaction. At high enough temperatures and conversion levels the reaction should provide the heat for the proceeding Mg(OH) production step, making the overall process energy neutral. So far we have been able to achieve a conversion degree of 26% at 500°C and 2.85MPa after 30min (particle size 125–212μm). In this paper the test facility and our latest results and progress on CO mineral carbonation are summarised. Also, the possible integration of the iron as a feedstock for iron and steel production will be briefly addressed. An interesting side-effect of this carbon dioxide capture and storage (CCS) route is that significant amounts of iron are obtained from the serpentinite rock material. This is released during the Mg(OH) production and can be of great interest to the iron- and steel producing sector, which at the same time is Finland’s largest CO producer.

Keywords： carbonation reaction     reactor     producer     large-scale     process    

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An assessment of surrogate fuel using Bayesian multiple kernel learning model in sight of sooting tendency

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 277-291 doi: 10.1007/s11708-021-0731-6

Abstract: surrogate fuels was proposed with the application of a machine learning method, named the Bayesian multiple

Keywords： sooting tendency     yield sooting index     Bayesian multiple kernel learning     surrogate assessment     surrogate    

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Analysis of the treatment outcomes of esophageal variceal bleeding patients from multiple centers in

WANG Zhiqiang

Frontiers of Medicine 2008, Volume 2, Issue 2,   Pages 171-173 doi: 10.1007/s11684-008-0031-0

Abstract: This study aimed to investigate the treatment outcomes of esophageal variceal bleeding (EVB) in China. A total of 1087 cases were collected from 19 hospitals in 16 large and medium sized cities across China between January 1st, 2005 and January 1st, 2006. There were 313 cases (29.0%) of mild (<400 mL), 494 cases (45.8%) of moderate (400–1500 mL) and 272 cases (25.2%) of severe (>1500 mL) bleeding. Successful hemostasis was achieved in 89.8% of cases. Seven hundred and eighty-five cases were treated by medication with a hemostasis rate of 91.8%. Seventy-one cases were treated using a Sengstaken-Blakemore tube with a hemostasis rate of 54.9%. Thirty-seven cases were treated with emergency endoscopic variceal ligation with a hemostasis rate of 83.8%. Seventy-seven cases were treated with endoscopic sclerotherapy with a hemostasis rate of 94.8%. Forty-three cases were treated with emergency surgical operation with a hemostasis rate of 95.3%. Sixty-six cases were treated with combined therapy with a hemostasis rate of 97.0%. There was a significant difference ( < 0.01) in the successful hemostasis rate between different treatments. The overall mortality was 10.1%, among which 6.6% was directly caused by bleeding. The multivariate logistic regression analysis shows that the severity of bleeding, treatment methods, liver dysfunction and activation of hepatitis were predictive factors for successful hemostasis. Most cases of EVB were mild and moderate in severity. The first-line treatment for EVB is medication. Emergency endoscopic intervention has not been widely available yet. The overall management outcome of EVB has been improved.

Keywords： significant difference     predictive     medication     first-line treatment     bleeding    

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Multiple-antenna techniques in nonorthogonalmultiple access: a review Regular Papers

Fei-yan TIAN, Xiao-ming CHEN

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 12,   Pages 1665-1697 doi: 10.1631/FITEE.1900405

Abstract: As a promising physical layer technique, nonorthogonal multiple access (NOMA) can admit multiple usersTo solve these problems, multiple-antenna techniques have been widely used in NOMA systems by exploitingThis study provides a comprehensive review of various multiple-antenna techniques in NOMA systems, withIn particular, we provide a detailed investigation on multiple-antenna techniques in two-user, multiuser

Keywords： Nonorthogonal multiple access     Multiple-antenna technique     B5G     Internet of Things    

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Sequential degradation-based burn-in test with multiple periodic inspections

Frontiers of Engineering Management 2021, Volume 8, Issue 4,   Pages 519-530 doi: 10.1007/s42524-021-0166-0

Abstract: and accelerated lifetime test, this study proposes a sequential degradation-based burn-in model with multiple

Keywords： burn-in     degradation     multiple inspections     Wiener process     partially observed Markov decision process    

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Sensitivity analysis of the deterioration of concrete strength in marine environment to multiple corrosive

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2,   Pages 175-190 doi: 10.1007/s11709-021-0791-z

Abstract: The corrosion degradation behavior of concrete materials plays a crucial role in the change of its mechanical properties under multi-ion interaction in the marine environment. In this study, the variation in the macro-physical and mechanical properties of concrete with corrosion time is investigated, and the source of micro-corrosion products under different salt solutions in seawater are analyzed. Regardless of the continuous hydration effect of concrete, the damage effects of various corrosive ions (Cl–, SO42−, and Mg2+, etc.) on the tensile and compressive strength of concrete are discussed based on measurement in different salt solutions. The sensitivity analysis method for concrete strength is used to quantitatively analyze the sensitivity of concrete strength to the effects of each ion in a multi-salt solution without considering the influence of continued hydration. The quantitative results indicate that the addition of Cl– can weaken the corrosion effect of SO42− by about 20%, while the addition of Mg2+ or Mg2+ and Cl– can strengthen it by 10%–20% during a 600-d corrosion process.

Keywords： sensitivity analysis     concrete strength     corrosion deterioration     multi-ion interaction     marine environment    

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Group-based multiple pipe routing method for aero-engine focusing on parallel layout

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 798-813 doi: 10.1007/s11465-021-0645-3

Abstract: This paper presents an automatic multiple pipe routing method for aero-engine that focuses on parallelimproved differential evolution algorithm, which adopts the coevolutionary strategy, is used to solve multiple

Keywords： multiple pipe routing     optimization algorithm     aero-engine     pipe grouping     parallel layout    

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Surface accuracy optimization of mechanical parts with multiple circular holes for additive manufacturing

Jinghua XU, Hongsheng SHENG, Shuyou ZHANG, Jianrong TAN, Jinlian DENG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 133-150 doi: 10.1007/s11465-020-0610-6

Abstract: This study proposes a surface accuracy optimization approach for mechanical parts with multiple circular

Keywords： surface accuracy optimization     multiple circular holes     additive manufacturing (AM)     part build orientation    

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Concentrating aqueous hydrochloric acid by multiple-effect membrane distillation

Rongling LIU, Yingjie QIN, Xiaojun LI, Liqiang LIU

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 311-321 doi: 10.1007/s11705-012-1207-3

Abstract: Multiple-effect membrane distillation (MEMD) using a hollow fiber-based air-gap membrane distillation

Keywords： multiple-effect membrane distillation     performance ratio     hydrochloric acid     recovery     stability    

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Impacts of solar multiple on the performance of direct steam generation solar power tower plant with

Yan LUO, Xiaoze DU, Lijun YANG, Chao XU, Muhammad AMJAD

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 461-471 doi: 10.1007/s11708-017-0503-5

Abstract: Solar multiple (SM) and thermal storage capacity are two key design parameters for revealing the performance

Keywords： direct steam generation     solar power tower     solar multiple     thermal energy storage capacity     levelized cost    

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Supplier selection and order splitting in multiple-sourcing inventory systems

WANG Guicong, JIANG Zhaoliang, LI Zhaoqian, LIU Wenping

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 23-27 doi: 10.1007/s11465-008-0016-3

Abstract: Supplier selection and inventory control are critical decision processes in single-item multiple-supplier

Keywords： automobile industry     branch-bound algorithm     selection     single-item multiple-supplier     effective    

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A rank-based multiple-choice secretary algorithm for minimising microgrid operating cost under uncertainties

Frontiers in Energy 2023, Volume 17, Issue 2,   Pages 198-210 doi: 10.1007/s11708-023-0874-8

Abstract: To address this challenge, a rank-based multiple-choice secretary algorithm (RMSA) was proposed for microgrid

Keywords： energy management systems     demand response     scheduling under uncertainty     renewable energy sources     multiple-choice    

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Gastrointestinal damage caused by swallowing multiple magnets

Shiqi Liu, Jianhui Li, Yi Lv

Frontiers of Medicine 2012, Volume 6, Issue 3,   Pages 280-287 doi: 10.1007/s11684-012-0207-5

Abstract:

Swallowing multiple magnets is not uncommon worldwide and it frequently leads to serious consequencesDamage from swallowing multiple magnets carries a significant risk of morbidity and even mortality throughout

Keywords： magnet     ingestion     fistula     perforation    

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CHALLENGES PROVIDING MULTIPLE ECOSYSTEM BENEFITS FOR SUSTAINABLE MANAGED SYSTEMS

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 2,   Pages 170-176 doi: 10.15302/J-FASE-2022444

Abstract:

Since humans started practicing agriculture at the expense of natural forests, 8000 years ago, they have affected atmospheric CO2concentrations. Their impact on atmospheric CH4 started about 5000 years ago, as result of the cultivation of paddy rice. A challenge of modern agricultural practices is to reverse the impact cropping has had on greenhouse gas emissions and the global climate. There is an increasing demand for agriculture to provide food security as well as a range of other ecosystem services. Depending on ecosystem management, different practices may involve trade-offs and synergies, and these must be considered to work toward desirable management systems. Solution toward food security should not only focus on agricultural management practices, but also on strategies to reduce food waste, more socially-just distribution of resources, changes in lifestyle including decarbonization of the economy, as well as reducing human population growth.

Keywords： crop diversification / ecosystem services / food security / sustainable cropping systems    

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Title Author Date Type Operation

Estimation of photolysis half-lives of dyes in a continuous-flow system with the aid of quantitative structure-property relationship

Davoud BEIKNEJAD,Mohammad Javad CHAICHI

Journal Article

A stepwise process for carbon dioxide sequestration using magnesium silicates

Johan FAGERLUND, Experience NDUAGU, Ron ZEVENHOVEN, Inês ROMÃO,

Journal Article

An assessment of surrogate fuel using Bayesian multiple kernel learning model in sight of sooting tendency

Journal Article

Analysis of the treatment outcomes of esophageal variceal bleeding patients from multiple centers in

WANG Zhiqiang

Journal Article

Multiple-antenna techniques in nonorthogonalmultiple access: a review

Fei-yan TIAN, Xiao-ming CHEN

Journal Article

Sequential degradation-based burn-in test with multiple periodic inspections

Journal Article

Sensitivity analysis of the deterioration of concrete strength in marine environment to multiple corrosive

Journal Article

Group-based multiple pipe routing method for aero-engine focusing on parallel layout

Journal Article

Surface accuracy optimization of mechanical parts with multiple circular holes for additive manufacturing

Jinghua XU, Hongsheng SHENG, Shuyou ZHANG, Jianrong TAN, Jinlian DENG

Journal Article

Concentrating aqueous hydrochloric acid by multiple-effect membrane distillation

Rongling LIU, Yingjie QIN, Xiaojun LI, Liqiang LIU

Journal Article

Impacts of solar multiple on the performance of direct steam generation solar power tower plant with

Yan LUO, Xiaoze DU, Lijun YANG, Chao XU, Muhammad AMJAD

Journal Article

Supplier selection and order splitting in multiple-sourcing inventory systems

WANG Guicong, JIANG Zhaoliang, LI Zhaoqian, LIU Wenping

Journal Article

A rank-based multiple-choice secretary algorithm for minimising microgrid operating cost under uncertainties

Journal Article

Gastrointestinal damage caused by swallowing multiple magnets

Shiqi Liu, Jianhui Li, Yi Lv

Journal Article

CHALLENGES PROVIDING MULTIPLE ECOSYSTEM BENEFITS FOR SUSTAINABLE MANAGED SYSTEMS

Journal Article