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SId International Symposium digest of Technical Papers, 2023

作者： Lee, Hyun Wook Ha, Jin Uk Baek, Jong-Min Lee, Jae Yong Jung, Seung Jae Choi, Tae-Hoon Department of Advanced Materials R&D Korea Automotive Technology Institute Cheonan31214 Korea Republic of Sales Team Sanayi System Co. Ltd. Incheon21984 Korea Republic of R&D Center Duckyang Ind. Co. Ltd. Suwon-si Gyeonggido16229 Korea Republic of

A two-domain quarter-wave retarder is employed as one layer of the circular polarizer to compensate for the retardation dependent on the incident angles. The reflective color differences of the panel between normal and oblique directions can be completely eliminated in an ambient light environment because of the effects of the multi-domain retarder. © 2023, John Wiley and Sons Inc. All rights reserved.

关键词： Liquid crystals

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CHEMICAL COMPOSITION ANd ANTIMICrOBIAL ACTIVITY OF VErBENA OFFICINALIS ANd ALOYSIA CITrOdOrA EXTrACTS OBTAINEd BY TrAdITIONAL ANd LABOrATOrY METHOdS

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UPB Scientific Bulletin, Series B: Chemistry and materials Science 2024年第3期86卷 111-122页

作者： Stancu, Alina-Ionela Geană, Elisabeta Irina ditu, Lia-Mara Ficai, Anton Nagoda, Eugenia Oprea, Eliza Department of Science and Engineering of Oxide Materials and Nanomaterials National University of Science and Technology POLITEHNICA Bucharest Romania National R&D Institute for Cryogenics and Isotopic Technologies – ICIT Râmnicu Vâlcea Romania Department of Microbiology and Immunology University of Bucharest Romania National Centre for Micro and Nanomaterials and National Centre for Food Safety National University of Science and Technology POLITEHNICA Bucharest Romania Academy of Romanian Scientists 3 Ilfov Street Bucharest050045 Romania Garden "D. Brandza" University of Bucharest Romania

The present study compares traditional and laboratory extraction methods applied to two plants from the Verbenaceae family, aiming for phenolic compound valorization. The decoction, and maceration were used as traditional methods, while alcoholic and water extractions were accomplished in laboratory conditions. The chemical composition of the Verbena officinalis and Aloysia citrodora extracts was established for the first time, from our knowledge, by Ultra-High-Performance Liquid Chromatography-Electrospray Ionization-High-resolution Mass Spectrometry. The alcoholic extracts (obtained traditionally and in the laboratory) of both plants had remarkable antimicrobial activity both on planktonic cells and on biofilms. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： Electrospray ionization

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research on Quantitative Method and Main Control Factors of drilling Crew Operation Effect 13th

Research on Quantitative Method and Main Control Factors of ...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Xiao, Yue Zhou, Tuo Jing, Ning Li, Hang-Yuan Wang, Gang Liu, Ji-Tong Ye, dong-Qing Zhong, Zhao Li, Bing-rou Jin, Yu-Lai Li, Gan-Lu Li, Jing CNPC Engineering Technology R&D Co. LTD. Beijing China PetroChina International Exploration and Development Co. LTD. Beijing China Beijing China Tianjin Petroleum Vocational and Technical College Tianjin China

ISBN: (纸本)9789819702558

The assessment of drilling crew is crucial for evaluating the operational effectiveness, improving management levels, and improving drilling operation quality and efficiency. Currently, most drilling crew operation evaluation only consider drilling speed and wellbore quality, which cannot fully reflect the overall operational effectiveness of the drilling crew and is not conducive to oilfield enterprises evaluating the operational effectiveness of the drilling crew. Based on sorting statistics and programming calculations methods, and considering the actual drilling site, a multi-level evaluation method for drilling crews was established to quantify the effectiveness of drilling crew operations and provide an evaluation method for multi drilling crew operation projects, considering key indicators such as drilling workload, drilling efficiency, drilling timeliness, wellbore quality control, and diesel consumption, which reflects workload, quality, efficiency, and economy respectively. A method for evaluating the main control factors of drilling operation performance was established based on the grey correlation analysis method, using the drilling crew score as the evaluation indicator for drilling crew operation performance. Taking XX Oilfield as an example, the performance of 8 drilling crews in XX Oilfield in 2020 was quantitatively scored. The analysis results showed that the order of evaluation for XX Oilfield in 2020 was: crew 2 > crew 4 > crew 3 > crew 5 > crew 1 > crew 6 > crew 7 > crew 8. Well quality is the main controlling factor affecting the performance of the drilling crew, and the evaluation results are in line with the actual situation of XX Oilfield. The multi-level drilling crew evaluation method established in this article provides assessment methods for multi-drilling crew operation projects and provides a theoretical basis for the formulation of operation management measures for project companies. © The Author(s), under exclusive license to Spring

关键词： Quality control

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Analysis of tool wear in micromilling Ti6Al4V and its impact on generated surface integrity

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Wear 2025年 570卷

作者： Gonçalves, Maria Clara Coimbra Alsters, rob Curtis, david Bushlya, Volodymyr M'Saoubi, rachid Ghadbeigi, Hassan University of Sheffield Mechanical Engineering Department Mappin Street Sheffield United Kingdom R&D Materials and Technology Development Seco Tools AB Zandterweg 14 Lottum5973 RC Netherlands Advanced Manufacturing Research Centre University of Sheffield RotherhamS60 5TZ United Kingdom Lund University Ole Römers väg 1 Lund221 00 Sweden R&D Materials and Technology Development Seco Tools AB Fagersta737 82 Sweden

Tool wear is one of the dominant factors that impacts the surface integrity of machined materials. Understanding the impact of tool wear on surface integrity is crucial in micromilling, due to the size of the features being machined and the cutting tools. Therefore, this work aims to analyse the impact of tool wear on surface integrity during the micromilling of Ti6Al4V. In this context, microslots were manufactured on a Ti6Al4V workpiece using both coated and uncoated 1 mm flat end mills at constant cutting parameters with varying cutting lengths in order to analyse the progression of tool wear with machined length and its impact on surface integrity. The microtools were investigated using both Scanning Electron Microscope (SEM) and infinite focus optical imaging (Alicona) to determine the tool wear evolution. Surface integrity was assessed by analysing surface roughness areal parameters, surface microscope images, and subsurface microstructure and microhardness perpendicular to the cutting direction. The results show that surface quality was not affected by the evolution of tool wear, with surface topography, including surface roughness parameters, remaining within a similar range until the catastrophic failure of the tool. Analysis of the machined surface revealed small chips adhered to it, which affected the surface texture height measurements, leading to a predominance of atypical peaks on the surface. Subsurface analysis of the machined material showed that the microstructure and microhardness remained consistent with the bulk material characteristics, indicating no evidence of severe plastic deformation in the machined subsurface. However, once the tool failed and began rubbing against the workpiece surface, swept grains due to material dragging and heat-affected zones were observed in the subsurface microstructure. Swept grains, caused by material extrusion, were also observed in the microstructure of the top burr formation regions throughout the experiments

关键词： Titanium alloys

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Experimental Investigation of Control rod drops Into Perturbed Fuel Assemblies

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Journal of Nuclear Engineering and radiation Science 2023年第4期9卷 041801页

作者： Park, Namgyu Kwon, Ohjoon Yoo, Youngik Kim, Taesoon Nuclear Fuel Technology Department R&D Center KEPCO Nuclear Fuel Daedeok-daero 989 beon-gil Yuseong-gu Daejeon34057 Korea Republic of Nuclear Fuel Technology Department R&D Center KEPCO Nuclear Fuel 242 Daedeok-daero 989 beon-gil Yuseong-gu Daejeon34057 Korea Republic of SMR Development Unit Central Research Institute Korea Hydro & Nuclear Power Co. LTD 70 Yuseong-daero 1312 beon-gil Yuseong-gu Daejeon34101 Korea Republic of

This paper discusses permanent deformation of the fuel assembly of pressurized water reactors that have to satisfy a drop time requirement of the control rod assembly. during a seismic event, the fuel assemblies and the reactor core exhibit transient vibration. When the fuel assemblies collide, they develop impact forces in the spacer grids along the fuel assemblies. If the impact forces on some spacer grids of the fuel assembly exceed an allowable strength, the buckling occurs in the corresponding spacer grids, followed by permanent deformation. The geometry change of the buckled spacer grids leads to the movement of the guide tube positions in the fuel assembly. Therefore the geometry change is associated with the distortion of the control rod drop path. In this study, the permanent deformation of the spacer grids was measured during the impact tests, and the maximum deviation of the guide tube from the original position was investigated. Control rod drop tests were also performed to measure the change in drop time according to the deformation of the fuel assembly. Using actuators in the loop test facility, the authors realized the first and second bending mode shapes of the fuel assembly under the flowing water condition. Based on a series of drop tests, the critical fuel assembly deformation was identified that could lead to a violation of an allowable drop time of the control rod. Copyright © 2023 by ASME.

关键词： Control rods

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What is Learned from Polymer Flooding Practices in Offshore reservoirs?

What is Learned from Polymer Flooding Practices in Offshore ...

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2023 Offshore technology Conference, OTC 2023

作者： Guo, Hu Wang, Zhengbo dang, Sisi Wen, rui Lyu, Xiuqin Liu, Huifeng Yang, Meng China University of Petroleum-Beijing CNPC Research Institue of Petroleum Exploration Development PetroChina Xinjiang Oilfield Company Sinopec Northwest Oilfield Company CNPC Engineering Technology R&D Company Limited

ISBN: (纸本)9781613999745

Polymer flooding is very promising chemical enhanced oil recovery technique because it has been widely field tested in many oil fields and commercially applied in several countries in onshore reservoirs. The understanding of polymer flooding mechanisms is still developing, even though the principal mechanism was sweep efficiency increase due to reduced mobility ratio of water and oil due to reduced mobility of water. The incorporation of polymer flooding mechanisms and practical challenges make some projects fail to attain economical or technical goal. For offshore reservoirs, the polymer flooding becomes more difficult because of limited space and harsh reservoirs. Although there were hundreds of polymer flooding field tests in onshore reservoirs, polymer flooding in offshore reservoirs remains limited. In this paper, the previous onshore polymer flooding lessons and findings were briefly reviewed to look into the mechanisms which can guide the design of polymer flooding in offshore reservoirs. Then, the lessons learned from previous offshore reservoirs were reviewed. Advices were given to improve the field test performance. it is conclude that low concentration polymer solution with moderately-low viscosity should be injected into offshore reservoirs to keep displacing pressure between injectors and producers. The injected polymers should have good transportation ability which avoids the formation blockage. The optimum injection timing remains to be further investigated because the evidences. The injection rate should be controlled to avoid well casing damage which has been observed in onshore reservoirs. Except for Bohai oilfield, the formation blockage was not reported in offshore reservoirs. However, the microfracture can form in injectors which improved the injectivity of polymers as long as the injected polymers have good transportation capacity. © 2023, Offshore technology Conference.

关键词： reservoirs (water)

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A micro-crosslinked amphoteric hydrophobic association copolymer as high temperature-and salt-resistance fluid loss reducer for water-based drilling fluids

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Petroleum Science 2024年第3期21卷 1980-1991页

作者： Jian Li Yu-Xi Ji Xiao-Xiao Ni Kai-He Lv Xian-Bin Huang Jin-Sheng Sun School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Qingdao26650ShandongChina Inspection and Testing Center of Huabei Oil Field Company PetroChinaRenqiu062552HebeiChina Drilling Fluid Research Institute CNPC Engineering Technology R&D Company LimitedBeijing102206China

during ultradeep oil and gas drilling,fluid loss reducers are highly important for water-based drilling fluids,while preparing high temperature-and salt-resistance fluid loss reducers with excellent rheology and filtration performance remains a ***,a micro-crosslinked amphoteric hydrophobic association copolymer(i.e.,dAdC)was synthesized using N,N-dimethyl acrylamide,diallyl dimethyl ammonium chloride,2-acrylamido-2-methylpropane sulfonic acid,hydrophobic monomer,and pentaerythritol triallyl ether *** to the synergistic effects of hydrogen bonds,electrostatic interaction,hydrophobic association,and micro-crosslinking,the dAdC copolymer exhibited outstanding temperature-and *** rheological experiments have shown that the dAdC copolymer had excellent shear dilution performance and a certain degree of salt-responsive viscosity-increasing *** dAdC copolymer could effectively adsorb on the surface of bentonite particles through electrostatic interaction and hydrogen bonds,which bring more negative charge to the bentonite,thus improving the hydration and dispersion of bentonite particles as well as the colloidal stability of the drilling ***,the drilling fluids constructed based on the dAdC copolymer exhibited satisfactory rheological and filtration properties(FLHTHP=12 m L)after aging at high temperatures(up to200℃)and high salinity(saturated salt)***,this work provided new insights into designing and fabricating high-performance drilling fluid treatment agents,demonstrating good potential applications in deep and ultradeep drilling engineering.

关键词： Fluid loss reducer Temperature-and salt-resistance Hydrophobic association Amphoteric Micro-crosslinking

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research and Application of Multilevel Wellbore Quality Quantification Method Based on random Forest Algorithm 13th

Research and Application of Multilevel Wellbore Quality Quan...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Xiao, Yue Zhou, Tuo Li, Hangyuan Kong, Xiangji Song, Lu diao, Shunong Liu, Jitong Zhong, Zhao Jin, Yulai Li, Bingrou CNPC Engineering Technology R&D Company Limited Beijing102206 China China National Oil and Gas Exploration and Development Corporation Beijing China National Engineering Research Center for Oil and Gas Drilling and Completion Technology Beijing China College of Petroleum Engineering Beijing China

ISBN: (纸本)9789819702558

The quality of drilling wellbore is crucial for oilfield companies to evaluate the construction acceptance of drilling operations, evaluate the wellbore quality before cementing operations, and smoothly implement subsequent casing and electrical logging tools. At present, the evaluation of wellbore quality only requires dispersed trajectory parameters of different well sections (well inclination angle, dog leg angle, target range), and only considers whether the trajectory parameters are within the qualified range during completion acceptance. A quantitative scoring method for wellbore quality has not yet been developed, which is not conducive to the evaluation of well quality by oilfield enterprises during drilling completion acceptance. In this paper, the key parameters such as deviation measurement interval, dogleg degree, maximum deviation and target hit are comprehensively considered. Based on the comprehensive method of mathematical statistics and Matlab programming calculation, a multi-level quantitative scoring model of well bore quality is established. The key parameters in the multi-level quantitative model of well bore quality are determined by using the main control factor analysis method of random forest algorithm. Taking the A oil field as an example, a quantitative scoring was conducted on the quality of 74 drilled wells in 2021 to evaluate the effectiveness of the operation team in controlling well quality. The analysis results showed that for the A oil field, the importance of factors affecting well quality was as follows: maximum inclination > Target radius > dog leg = survey interval. Crew 1 had better control over well quality, and the proportion of high-quality wells in 2021 decreased compared to 2020, The analysis results of the multi-level well bore quality quantification method based on random forest algorithm proposed in this paper are in line with the field work practice, which provides a theoretical basis for well bore quality quantificati

关键词： MATLAB

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research on cognitive load evaluation with subjective method in manual assembly

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High technology Letters 2023年第4期29卷 434-444页

作者：任彬 ZHOU Qinyu LI Qibing LUO Wenfa Shanghai Key Laboratory of Intelligent Manufacturing and Robotics School of Mechatronic Engineering and AutomationShanghai UniversityShanghai 200444P.R.China Zhejiang Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201P.R.China SAIC Motor R&D Innovation Headquarters SAIC Motor Corporation LimitedShanghai 201804P.R.China

Subjective scales have different kinds of applicability in diverse *** study intends to implement a quantitative approach to determine the applicability of subjective scales in manual as-sembly work and evaluate the cognitive load of assembly workers.A multi-scale research paradigm based on subjective evaluation method is *** typical task stages are extracted from the process of assembly *** National Aeronautics and Space Administration Task Load Index(NASA-TLX)scale,PAAS scale and Workload Profile Index ratings(WP)scale are selected for the design of 3×3 multi-factor mixed *** power spectrum density(PSd)characteris-tics of electroencephalogram(EEG)are utilized to identify the difficulty levels of the three task *** relevant indicators of scale applicability are *** results show that in terms of sensitivity,NASA-TLX scale reaches the highest sensitivity(F=999.137,P=0<0.05).In terms of validity,NASA-TLX scale possesses the best concurrent validity(P=0.0255<0.05).In terms of diagnosticity,NASA-TLX scale based on 6 dimensions takes on the best diagnostic *** terms of subject acceptability,WP scale performs the *** to the analytic hierarchy process(AHP)model,the applicability scores of NASA-TLX scale,PAAS scale and WP scale are determined as 3,2.55 and 1.6714,***,NASA-TLX scale is regarded as the most suitable subjective evaluation questionnaire for assembly workers,which is also an effective quantitative evaluation method for the cognitive load of assembly workers.

关键词： assembly worker electroencephalogram(EEG) analytic hierarchy process(AHP) National Aeronautics and Space Administration Task Load Index(NASA-TLX)scale subjective evaluation scale applicability

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How well can PPG be an alternative to ECG for acute stress detection in nonresting state?—Comprehensive evaluation using a dNN

How well can PPG be an alternative to ECG for acute stress d...

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International Conference on Affective Computing and Intelligent Interaction Workshops and demos (ACIIW)

作者： Yasuhide Hyodo Kiyoshi Yoshikawa Takanori Ishikawa Yota Komoriya Human Technology R&D Department Technology Development Laboratories Sony Corporation Tokyo Japan

Heart rate variability (HrV) analysis in a wristband photoplethysmography (PPG) device is gathering interest for emotion and stress recognition. However, motion artifacts are a critical issue, and comprehensive evaluation from HrV analysis to the model performance and interpretability should be conducted. In this study, we constructed a physiologically interpretable evaluation framework of HrV analysis and acute stress recognition using a deep neural network (dNN) in a wrist-worn PPG device compared with that in a chest-worn electrocardiography (ECG) device, considering motion artifacts, which are an important issue in wild environments. Furthermore, we developed model training and testing methods using a dNN that takes signal quality into account to achieve both accuracy (robustness against motion artifacts) and model interpretability in acute stress recognition in the wrist-worn PPG device. The results suggest that the method we developed improved the acute stress recognition performance of the wrist-worn PPG device throughout our experiments (78.4% accuracy and 77.0% F1 score). In addition, it was observed that the method for the wrist-worn PPG device demonstrated comparable performance and interpretability to the reference method for the chest-worn ECG device.

关键词：

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