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FACTORS OF 3GWC SYSTEMS FOR DRAWING UP CUSTOMIZED STRATEGIES OF PROMOTION

Journal of Systems Science and Systems Engineering 2011年第3期20卷 365-381页

作者： Hsin-pin FU Hwan-Yann SU Fang-Hua WANG Ching-Yi chang Hung-Hsuan LEE Department of Marketing and Distribution Management National Kaohsiung First University of Science and Technology Kaohsiung Taiwan China Department of Asia-Pacific Industrial and Business Management National University of Kaohsiung Taiwan China Antai College of Economics ＆ Management Shanghai Jiao Tong University Shanghai China Antai College of Economics ＆ Management Shanghai Jiao Tong University Shanghai China Institute of Management National Kaohsiung First University of Science and Technology Taiwan China

This study utilizes fuzzy analytic hierarchy process （FAHP） to analyze decision-making pattems with regard to third-generation wireless communications （3GWC） service adoption, and to provide customized strategic recommendations to suppliers of 3GWC services regarding marketing and resource allocation in the context of the Chinese 3GWC market. First of all, a three-layer hierarchy of 3GWC adoption factors is developed by referring to the relevant literature and industry reports. A questionnaire of pairwise comparisons in the fuzzy AHP format is then designed and distributed to experts familiar with the handset market in Shanghai, China. These surveys are then analyzed using fuzzy AHP to establish an understanding of the weights and impacts of the various factors. The results show that the four most important factors for the adoption of 3GWC systems are：（i） handset price and voice and data-transmission fees; （ii） handset aesthetics; （iii） personalization; and （iv） network coverage. These findings suggest that providers of such services should customize and diversify the content/applications they offer and ensure the speed and reliability of network access. In addition, handset designs should be in accordance with consumer demands. If these steps can be achieved, then consumers will adopt 3GWC services more rapidly.

关键词： 3GWC (third generation mobile) adoption factors FAHP

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Distribution of antibiotic resistance genes and their association with bacteria and viruses in decentralized sewage treatment facilities

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Frontiers of Environmental Science & Engineering 2022年第3期16卷 91-104页

作者： Jiaheng Zhao Bing li pin Lv Jiahui Hou Yong Qiu Xia Huang School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

The distribution of antibiotic resistance genes(ARGs)has been intensively studied in large-scale wastewater treatment plants and livestock ***,small-scale decentralized sewage treatment facilities must also be explored due to their possible direct exposure to *** this study,six wastewater treatment facilities in developed rural areas in eastern China were investigated to understand their risks of spreading *** metagenomics and network analysis tools,ARGs and bacterial and viral communities were identified in the influent(INF)and effluent(EFF)*** dominant ARGs belonged to the bacitracin class,which are different from most of municipal wastewater treatment plants(WWTPs).The dominant hosts of ARGs are Acidovorax in bacterial communities and Prymnesiovirus in viral ***,a positive relationship was found between ARGs and *** ARGs significantly correlated with phages were all hosted by specific genera of bacteria,indicating that phages had contributed to the ARG’s proliferation in sewage treatment *** significant concern on the possible enhanced risks caused by bacteria,viruses and their related ARGs in decentralized sewage treatment facilities is necessary.

关键词： Decentralized sewage treatment facilities Antibiotic resistance genes Virus Metagenomics Network analysis

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Chip-based ion chromatography (chip-IC) with a sensitive five-electrode conductivity detector for the simultaneous detection of multiple ions in drinking water

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Microsystems & Nanoengineering 2020年第1期6卷 530-537页

作者： Xiaoping li Honglong chang Ministry of Education Key Laboratory of Micro/Nano Systems for Aerospace School of Mechanical EngineeringNorthwestern Polytechnical University710072 Xi’anP.R.China

The emerging need for accurate,efficient,inexpensive,and multiparameter monitoring of water quality has led to interest in the miniaturization of benchtop chromatography *** paper reports a chip-based ion chromatography(chip-IC)system in which the microvalves,sample channel,packed column,and conductivity detector are all integrated on a polymethylmethacrylate(PMMA)chip.A laser-based bonding technique was developed to guarantee simultaneous robust sealing between the homogeneous and heterogeneous interfaces.A five-electrode-based conductivity detector was presented to improve the sensitivity for nonsuppressed anion *** anions(F^(−),Cl^(−),NO_(3)^(−),and SO _(4)^(2−))were separated in less than 8 min,and a detection limit(LOD)of 0.6 mg L^(−1) was achieved for SO_(4)^(2−).Tap water was also analyzed using the proposed chip-IC system,and the relative deviations of the quantified concentration were less than 10%when compared with that a commercial IC system.

关键词： conductivity electrode chromatography

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Dielectronic Recombination for the Self-Consistent-Field Average Ions

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Chinese Physics Letters 1996年第9期13卷 664-667页

作者： ZHAO li-bo li Shi-chang Institute of Applied Physics and Computational Mathematics Beijing 100088

A self-consistent-field theoretical method has been developed to treat the dielectronic recombination(DR)of average ions with *** on the method,the rate coefficients for DR into a special state can be *** an example,t... 详细信息

关键词： population method presented

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Temporal variations in geochemistry of hydraulic fracturing fluid and flowback water in a tight oil reservoir

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Petroleum Science 2023年第5期20卷 3013-3021页

作者： Jie Tian liang Wang li-pin Ni li-Wei Mou Shu-Te Su Mehdi Ostadhassan College of Energy Chengdu University of TechnologyChengdu610059SichuanChina Geological Research Institute CNPC LoggingXi'an710000ShaanxiChina Exploration and Development Research Institute Xinjiang Oilfield BranchPetroChinaKaramay834000XinjiangChina Institute of Geosciences Marine and Land Geomechanics and GeotectonicsChristian-Albrechts Universit€atKiel24118Germany

Hydraulic fracturing facilitates the development and exploitation of unconventional *** this study,the injected hydraulic fracturing fluid(HFF)and flowback and produced water(FPW)in tight oil reservoirs of the Lucaogou Formation in the Junggar Basin are temporally sampled from day 1 to day *** is used for fracturing,and HFF is *** chemical and isotopic parameters(including the water type,total salinity,total dissolved solids(TDS),pH,concentrations of Na^(+),Cl^(-),Ba^(+),K^(+),Fe^(2+)+Fe^(3+),and CO_(3)^(2-),dD,and δ^(18)O)are experimentally obtained,and their variations with time are systematically analyzed based on the flowback *** results show that the water type,Na/Cl ratio,total salinity,and TDS of the FPW change periodically primarily due to the HFF mixing with formation water,thus causing δD and δ^(18)O to deviate from the meteoric water line of *** of watererock interaction(WRI),the concentrations of Fe^(2+)+Fe^(3+)and CO_(3)^(2-)of the FPW increase over time,with the solution pH becoming more ***,based on the significant changes observed in the geochemistry of the FPW,three separate time intervals of flowback time are identified:Stage Ⅰ(changes in ions and isotopes are mainly caused by the WRI;Stage Ⅱ(10-37 days),where the FPW is dominated by the addition of formation water to the HFF and the WRI is weakened;and finally,Stage Ⅲ(>37 days),where the FPW is dominated by the chemistry of the formation *** methodology implemented in this study can provide critical support for the source identification of formation water.

关键词： Tight oil reservoirs Isotope Flowback and produced water(FPW) Inorganic ions Hydraulic fracturing fluid(HFF)

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Comparative study on microstructure evolution and failure mechanisms of ordinary and refurbished EB-PVD TBC under cyclic oxidation

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Journal of Advanced Ceramics 2023年第9期12卷 1805-1820页

作者： Pan li Xiaochao Jin pin Lu Delin liu Rende Mou Xueling Fan Xi’an Key Laboratory of Extreme Environmental Serviceability and Protection Technologies School of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049China AECC Beijing Institute of Aeronautical Materials Beijing 100095China

Refurbishment of thermal barrier coating(TBC)has become a valuable technique to prolong the service life of high-temperature *** study investigates the effect of the refurbishment process(coating removal and recoating)on the microstructure evolution and physical properties of TBC,including oxidation characteristics,element diffusion behavior,and crack failure *** results showed that a certain amount of interdiffusion zone(IDZ)with Cr-rich would be retained in DD6 superalloy substrate after coating *** microstructure of the refurbished specimens showed equiaxedβ-NiAl phases,while the ordinary specimens have elongated grain shapes with a high aspect ***,mixed oxides in the refurbished TBC specimens were earlier observed during cyclic oxidation,with a greater thickness compared to ordinary TBC,due to the influence of BC layer phase *** growth mechanism of thermally grown oxide(TGO-Al_(2)O_(3)layer)in the refurbished TBC specimens was also different,resulting from the different mechanisms of mixed oxides ***,under cyclic oxidation with water quenching at 1100℃,the cracks in the refurbished specimen tend to occur in the mixed oxides layer,while the cracks in the ordinary specimen occur in the top coat(TC)layer,attributing to the earlier and thicker mixed oxides layer formed in refurbished specimens.

关键词： thermal barrier coating(TBC)systems coating removal refurbishment cyclic oxidation microstructure evolution failure mechanism

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Design and optimization of reactive distillation: a review

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Frontiers of Chemical Science and Engineering 2022年第6期16卷 799-818页

作者： chang Shu Xingang li Hong li Xin Gao School of Chemical Engineering and Technology National Engineering Research Center of Distillation TechnologyCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072China

Reactive distillation process,a representative process intensification technology,has been widely applied in the chemical ***,due to the strong interaction between reaction and separation,the extension of reactive distillation technology is restricted by the difficulties in process analysis and *** overcome this problem,the design and optimization of reactive distillation have been widely studied and illustrated for plenty of reactive mixtures over the past three *** design and optimization methods of the reactive distillation process are classified into three categories:graphical,optimization-based,and evolutionary/heuristic *** primary objective of this article is to provide an up-to-date review of the existing design and optimization *** and output information,advantages and limitations of each method are stated,the modification and development for original methodologies are also *** on future research on the design and optimization of reactive distillation method are proposed for further research.

关键词： reactive distillation process intensification design method reactive phase diagram optimization algorithm

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Effects of benthic hydraulics on sediment oxygen demand in a canyon-shaped deep drinking water reservoir:Experimental and modeling study

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Journal of Environmental Sciences 2021年第4期33卷 226-234页

作者： Nan li Tinglin Huang Zhiying chang Kai li Key Laboratory of Northwest Water Resource Environment and EcologyMOEXi’an University of Architecture and TechnologyXi’an 710055China Shaanxi Key Laboratory of Environmental Engineering Xi’an University of Architecture and TechnologyXi’an 710055China

Sediment oxygen demand(SOD)is a major contributor to hypolimnetic oxygen depletion and the release of internal nutrient *** measuring the SOD in experimental chambers using in both dissolved oxygen(DO)depletion and diffusional oxygen transfer methods,a model of SOD for a sediment bed with water current-induced turbulence was *** experimental study was also performed using near-sediment vertical DO profiles and correlated hydraulic parameters stimulated using a computational fluid dynamics model to determine how turbulences and DO concentrations in the overlying water affects SOD and diffusive boundary layer *** dependence of the oxygen transfer coefficient and diffusive boundary layer on hydraulic parameters was quantified,and the SOD was expressed as a function of the shear velocity and the bulk DO *** predictions were validated using microelectrode measurements in a series of laboratory *** study found that flow over the sediment surface caused an increase in SOD,attributed to enhanced sediment oxygen uptake and reduced substances fluxes,i.e.,for a constant maximum biological oxygen consumption rate,an increased current over the sediment could increase the SOD by 4.5 times compared to stagnant *** results highlight the importance of considering current-induced SOD increases when designing and implementing aeration/artificial mixing strategies.

关键词： Sediment oxygen demand Sediment-water flux Diffusive boundary layer thickness Turbulence Biological oxygen consumption

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Design and development of multi-channel front end electronics based on dual-polarity charge-to-digital converter for SiPM detector applications

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Nuclear Science and Techniques 2023年第2期34卷 1-12页

作者： Yu‑Ying li chang‑Yu li Kun Hu Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China

With the development of silicon photomultiplier(SiPM)technology,front-end electronics for SiPM signal processing have been highly sought after in various fields.A compact 64-channel front-end electronics(FEE)system achieved by fieldprogrammable gate array-based charge-to-digital converter(FPGA-QDC)technology was built and *** FEE consists of an analog board and FPGA *** analog board incorporates commercial amplifiers,resistors,and *** FPGA board is composed of a low-cost *** electronics performance of the FEE was evaluated in terms of noise,linearity,and uniformity.A positron emission tomography(PET)detector with three different readout configurations was designed to validate the readout capability of the FEE for SiPM-based *** PET detector was made of a 15×15 lutetium–yttrium oxyorthosilicate(LYSO)crystal array directly coupled with a SiPM array *** experimental results show that FEE can process dual-polarity charge signals from the SiPM *** addition,it shows a good energy resolution for 511-keV gamma photons under the dual-end readout for the LYSO crystal array irradiated by a Na-22 ***,the FEE based on FPGA-QDC shows promise for application in SiPM-based radiation detectors.

关键词： Readout electronics Charge measurement Radiation detector Silicon photomultiplier Field-programmable gate array

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An efficient and convenient method for preparation of disulfides from thiols using air as oxidant catalyzed by Co-Salophen

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Chinese Chemical Letters 2011年第12期22卷 1403-1406页

作者： pin Ji Chai Yong Shu li Cheng Xia Tan College of Chemical Engineering and Materials Sciences Zhejiang University of TechnologyHangzhou 310014China College of Pharmaceutical Sciences Zhejiang University of TechnologyHangzhou 310014China

Disulfides have been synthesized by oxidation of thiols using air as oxidant catalyzed by Co-Salophen with high yields,mild and neutral conditions,and easy procedures of the *** products were confirmed by ~1H NMR and IR.

关键词： Disulfides Air Co-Salophen Oxidant Catalyst

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