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A highly efficient methodology for the preparation of

Yongxin Zhang, Shucheng Wang, Yaodong Huang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 679-686 doi: 10.1007/s11705-020-1979-9

Abstract: A convenient and highly efficient method is described for the synthesis of -methoxycarbazole derivativesBased on this methodology, the first total synthesis of 3,3′-[oxybis(methylene)]bis(9-methoxy-9 -carbazole

Keywords： N-methoxyl carbazole     dimeric N-methoxyl carbazole     alkaloid     total synthesis     double N<    

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An Eight-Step Continuous-Flow Total Synthesis of Vitamin B1 Article

Meifen Jiang, Minjie Liu, Weijian Li, Yingqi Xia, Fener Chen

Engineering 2024, Volume 32, Issue 1,   Pages 230-239 doi: 10.1016/j.eng.2023.01.016

Abstract: This study reports on an integrated eight-step continuous-flow synthesis of vitamin B1 fromVitamin B1 was produced with a separated yield of 47.7% and high purity, with a total residence

Keywords： Vitamin B1     Continuous-flow synthesis     Micro-reactor     Continuous manufacturing    

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Simultaneous removal of total oxidizable carbon, phosphate and various metallic ions from HO solution

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 470-482 doi: 10.1007/s11705-022-2231-6

Abstract: Accordingly, the removal efficiency of total oxidizable carbon, phosphate and metallic ions from theThe removal efficiency of 82.7% for total oxidizable carbon, 34.2% for phosphate, 87.1% for Fe3+, 83.2% for Al3+, 55.1% for Ca2+ and 66.6% for Mg2+, with a total

Keywords： adsorption     zirconia     total oxidizable carbon     phosphate     metallic ions     hydrogen peroxide    

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Implementation of total Lagrangian formulation for the elasto-plastic analysis of plane steel frames

Bing XIA, Yuching WU, Zhanfei HUANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 257-266 doi: 10.1007/s11709-012-0163-9

Abstract: In this paper, the co-rotational total Lagrangian forms of finite element formulations are derived to

Keywords： co-rotational     total Lagrangian     geometrical nonlinearity     fire     elasto-plastic    

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Exergy and exergoeconomic analyses for integration of aromatics separation with aromatics upgrading

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 2,   Pages 183-193 doi: 10.1007/s11705-022-2192-9

Abstract: The process generates lower total exergy destruction when the splitting ratio of toluene varies betweenNevertheless, the process presents lower total product unit cost with the splitting ratio of tolueneBesides, it is found that distillation is the biggest contributor to the total exergy destruction, accounting

Keywords： aromatics separation and upgrading     variant splitting ratios     total exergy destruction     total product    

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Critical flow-storm approach to total maximum daily load (TMDL) development: an analytical conceptual

Zhang Harry, Yu Shaw

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 3,   Pages 267-273 doi: 10.1007/s11783-008-0058-0

Abstract: One of the key challenges in the total maximum daily load (TMDL) development process is how to define

Keywords： representative hydrologic     occurrence     simulation approach     scarcity     alternative    

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From total quality management to Quality 4.0: A systematic literature review and future research agenda

Frontiers of Engineering Management 2023, Volume 10, Issue 2,   Pages 191-205 doi: 10.1007/s42524-022-0243-z

Abstract: Quality 4.0 is an emerging concept that has been increasingly appreciated because of the intensification of competition, continually changing customer requirements and technological evolution. It deals with aligning quality management practices with the emergent capabilities of Industry 4.0 to improve cost, time, and efficiency and increase product quality. This article aims to comprehensively review extant studies related to Quality 4.0 to uncover current research trends, distil key research topics, and identify areas for future research. Thus, 46 journal articles extracted from the Scopus database from 2017 to 2022 were collected and reviewed. A descriptive analysis was first performed according to the year-wise publication, sources of publication, and research methods. Then, the selected articles were analyzed and classified according to four research themes: Quality 4.0 concept, Quality 4.0 implementation, quality management in Quality 4.0, and Quality 4.0 model and application. By extracting the literature review findings, we identify the Quality 4.0 definitions and features, develop the quality curve theory, and highlight future research opportunities. This study supports practitioners, managers, and academicians in effectively recognizing and applying Quality 4.0 to enhance customer satisfaction, achieve innovation enterprise efficiency, and increase organizational competitiveness in the era of Industry 4.0.

Keywords： quality management     Quality 4.0     Industry 4.0     literature review     predictive quality    

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Total stress rapid drawdown analysis of the Pilarcitos Dam failure using the finite element method

Daniel R. VANDENBERGE

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 115-123 doi: 10.1007/s11709-014-0249-7

Abstract: A new total stress rapid drawdown method based on finite element analysis is used to analyze the rapid

Keywords： rapid drawdown     finite element     total stress     slope stability    

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A total torque index for dynamic performance evaluation of a radial symmetric six-legged robot

Kejia LI, Xilun DING, Marco CECCARELL

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 2,   Pages 219-230 doi: 10.1007/s11465-012-0320-9

Abstract: A novel index of total torque is proposed by considering the posture of the supporting legs.

Keywords： six-legged robots     dynamic modeling     performance index    

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Total phosphorus concentrations in surface water of typical agro- and forest ecosystems in China, 2004

Juan XIE,Xinyu ZHANG,Zhiwei XU,Guofu YUAN,Xinzhai TANG,Xiaomin SUN,D.J. BALLANTINE

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 4,   Pages 561-569 doi: 10.1007/s11783-013-0601-5

Abstract: The concentrations of total phosphorus (TP) from 83 surface water sampling sites in 29 of the Chinese

Keywords： Chinese Ecosystem Research Network (CERN)     total phosphorus (TP)     surface water     ecosystem type     spatial    

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Standard method design considerations for semi-quantification of total naphthenic acids in oil sands

Kevin A. Kovalchik, Matthew S. MacLennan, Kerry M. Peru, John V. Headley, David D.Y. Chen

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 3,   Pages 497-507 doi: 10.1007/s11705-017-1652-0

Abstract: Dozens of analytical methods have been developed for the semi-quantification of total naphthenic acidsA review of important methodological features for analyzing total naphthenic acids is presented and informsthe design of future standard methods for the semi-quantification of total naphthenic acids using massThe design considerations presented are a synthesis of discussions from an Environment and Climate Change

Keywords： total naphthenic acids     environmental samples     oil sands process affected water     polar organics     mass spectrometry    

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Automated synthesis of steady-state continuous processes using reinforcement learning

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 288-302 doi: 10.1007/s11705-021-2055-9

Abstract: Automated flowsheet synthesis is an important field in computer-aided process engineering.The present work demonstrates how reinforcement learning can be used for automated flowsheet synthesisTherein, flowsheet synthesis is modelled as a game of two competing players.

Keywords： automated process synthesis     flowsheet synthesis     artificial intelligence     machine learning     reinforcement    

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Evaluation of groundwater quality in the Xinjiang Plain Area

Jinlong ZHOU, Xinguang DONG, Yiping WANG, Guomin LI, Xiaojing GUO,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2,   Pages 183-186 doi: 10.1007/s11783-010-0021-8

Abstract: Total dissolved solids, total hardness, pH value, NH–N, CHOH, Chemiluminescence detection of permanganate

Keywords： groundwater quality     evaluation     one veto method     total dissolved solids (TDS)     pH     total hardness    

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Modified pretreatment method for total microbial DNA extraction from contaminated river sediment

Yun FANG,Meiying XU,Xingjuan CHEN,Guoping SUN,Jun GUO,Weimin WU,Xueduan LIU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 444-452 doi: 10.1007/s11783-014-0679-4

Abstract: Extraction of high-quality microbial DNA from contaminated environmental samples is an essential step in microbial ecological study. Based on previously published methods for soil and sediment samples, a modified pretreatment method was developed for extracting microbial DNA from heavily contaminated river sediment samples via selection of optimal pretreatment parameters (i.e., reagent solution, reaction duration, and temperature). The pretreatment procedure involves washing the river sediment sample for three times with a solution containing 0.1 mol·L ethylene diamine tetraacetic acid (EDTA), 0.1 mol·L Tris (pH 8.0), 1.5 mol·L NaCl, 0.1 mol·L NaH PO , and Na HPO at 65°C with 180 r·min for 15 min to remove humic materials and heavy metals prior to the employment of standard DNA extraction procedures. We compared the results of standard procedure DNA extraction following pretreatment, without pretreatment, and with using a commercial PowerSoil DNA Isolation Kit. The results indicated that the pretreatment significantly improved the DNA quality based on DNA yield, DNA fragment length, and determination of prokaryotic diversity. Prokaryotic diversity exhibited in the DNA with the pretreatment was also considerably higher than that extracted with the PowerSoil DNA Isolation Kit only. The pretreatment method worked well even with a small amount of sediment sample (0.25 g or even lower). The method provides a novel, simple, cost-effective tool for DNA extraction for microbial community analysis in environmental monitoring and remediation processes.

Keywords： river sediment     DNA extraction     contaminant     pretreatment     microbial community    

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Impact of total organic carbon and chlorine to ammonia ratio on nitrification in a bench-scale drinking

Yongji ZHANG, Lingling ZHOU, Guo ZENG, Huiping DENG, Guibai LI

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 4,   Pages 430-437 doi: 10.1007/s11783-010-0247-5

Abstract: The aim of this study was to investigate the impact of total organic carbon and chlorine to ammonia ratiomonitored using four rotating annular bioreactors (RAB) with different chlorine to ammonia ratios and total

Keywords： nitrification     drinking water     ammonia- oxidizing bacteria (AOB)     chloramines     organic carbon     heterotrophic bacteria    

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Title Author Date Type Operation

A highly efficient methodology for the preparation of

Yongxin Zhang, Shucheng Wang, Yaodong Huang

Journal Article

An Eight-Step Continuous-Flow Total Synthesis of Vitamin B1

Meifen Jiang, Minjie Liu, Weijian Li, Yingqi Xia, Fener Chen

Journal Article

Simultaneous removal of total oxidizable carbon, phosphate and various metallic ions from HO solution

Journal Article

Implementation of total Lagrangian formulation for the elasto-plastic analysis of plane steel frames

Bing XIA, Yuching WU, Zhanfei HUANG

Journal Article

Exergy and exergoeconomic analyses for integration of aromatics separation with aromatics upgrading

Journal Article

Critical flow-storm approach to total maximum daily load (TMDL) development: an analytical conceptual

Zhang Harry, Yu Shaw

Journal Article

From total quality management to Quality 4.0: A systematic literature review and future research agenda

Journal Article

Total stress rapid drawdown analysis of the Pilarcitos Dam failure using the finite element method

Daniel R. VANDENBERGE

Journal Article

A total torque index for dynamic performance evaluation of a radial symmetric six-legged robot

Kejia LI, Xilun DING, Marco CECCARELL

Journal Article

Total phosphorus concentrations in surface water of typical agro- and forest ecosystems in China, 2004

Juan XIE,Xinyu ZHANG,Zhiwei XU,Guofu YUAN,Xinzhai TANG,Xiaomin SUN,D.J. BALLANTINE

Journal Article

Standard method design considerations for semi-quantification of total naphthenic acids in oil sands

Kevin A. Kovalchik, Matthew S. MacLennan, Kerry M. Peru, John V. Headley, David D.Y. Chen

Journal Article

Automated synthesis of steady-state continuous processes using reinforcement learning

Journal Article

Evaluation of groundwater quality in the Xinjiang Plain Area

Jinlong ZHOU, Xinguang DONG, Yiping WANG, Guomin LI, Xiaojing GUO,

Journal Article

Modified pretreatment method for total microbial DNA extraction from contaminated river sediment

Yun FANG,Meiying XU,Xingjuan CHEN,Guoping SUN,Jun GUO,Weimin WU,Xueduan LIU

Journal Article

Impact of total organic carbon and chlorine to ammonia ratio on nitrification in a bench-scale drinking

Yongji ZHANG, Lingling ZHOU, Guo ZENG, Huiping DENG, Guibai LI

Journal Article