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Nanoparticle-reinforced foam system for enhanced oil recovery(EOR):Mechanistic review and perspective

Petroleum Science 2023年第4期20卷 2282-2304页

作者： Xue-Chen Tang Yi-Qiang Li zhe-yu Liu Ning zhang National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249PR China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing102249PR China Tianjin Branch of China National Offshore Oil Corporation Limited Tianjin300459PR China

Boosted by economic development and rising living standards,the world's carbon dioxide emissions remain *** temperature rises below 1.5℃ by the end of the century requires rapid global carbon capture and storage *** successful application of carbon capture,utilization,and storage(CCUS)technology in oilfields has become the key to getting rid of this *** flooding,as an organic combination of gas and chemical flooding,became popular in the *** the irreplaceable advantages,as a thermodynamically unstable system,foam's stability has long restricted its development in enhanced oil and gas *** special surface/interface effects and small-size effects,nanoparticles can be used as foam stabilizers to enhance foam stability,thereby improving foam seepage and oil displacement effects in porous *** this paper,the decay kinetics and the stabilization mechanisms of nanoparticle-reinforced foams were systematically *** effects of nanoparticle characteristics,including particle concentration,surface wettability,particle size,and type,and reservoir environment factors,including oil,temperature,pressure,and salinity on the foam stabilization ability were analyzed in *** seepage and flooding mechanisms of nanoparticle-reinforced foams were summarized as:improving the plugging properties of foams,enhancing the interaction between foams and crude oil,and synergistically adjusting the wettability of reservoir ***,the challenges in the practical application of nanoparticle-reinforced foams were highlighted,and the development direction was *** development of nanoparticle-reinforced foam can open the way toward adaptive and evolutive EOR technology,taking one further step towards the high-efficiency production of the petroleum industry.

关键词： Nanoparticle Foam stability Porous media Oil displacement mechanism Enhanced oil recovery

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日粮中添加枯草芽孢杆菌对高氧气调包装猪肉蛋白质和脂质氧化的影响

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食品科学 2025年第1期46卷 142-148页

作者：张悦于江刘飞张玉玉张一敏毛衍伟山东农业大学食品科学与工程学院山东泰安271018 山东省农业科学院畜牧兽医研究所农业农村部畜禽生物组学重点实验室山东济南250100

为探究日粮添加枯草芽孢杆菌对猪肉抗氧化能力以及高氧气调包装贮藏期间猪肉肉色、蛋白质氧化、脂质氧化和感官品质的影响,选取对照组(只饲喂基础日粮)和处理组(基础日粮添加枯草芽孢杆菌)的三元杂交(杜洛克×长白×大约克)猪各6只,屠... 详细信息

为探究日粮添加枯草芽孢杆菌对猪肉抗氧化能力以及高氧气调包装贮藏期间猪肉肉色、蛋白质氧化、脂质氧化和感官品质的影响,选取对照组(只饲喂基础日粮)和处理组(基础日粮添加枯草芽孢杆菌)的三元杂交(杜洛克×长白×大约克)猪各6只,屠宰后取背最长肌测定抗氧化酶活性,其余背最长肌样品进行高氧气调包装,4℃冷库贮藏,分别在0、5、10、15、20?d测定肉色、丙二醛(malondialdehyde,MDA)、羰基和巯基含量,并进行感官评价。结果表明:与对照组相比,处理组能够显著提高超氧化物歧化酶、谷胱甘肽过氧化物酶和过氧化氢酶活性(P<0.05),增强猪肉的抗氧化能力;日粮中添加枯草芽孢杆菌可以显著改善高氧气调包装猪肉的肉色(P<0.05);在低温贮藏期间,处理组能够显著降低MDA含量(P<0.05),抑制高氧气调包装猪肉的脂肪氧化;日粮中添加枯草芽孢杆菌能够显著抑制高氧气调包装猪肉的蛋白质氧化、羰基的生成和巯基损失(P<0.05),同时显著提高猪肉打开包装前的颜色和打开包装后的总体喜爱度评分(P<0.05)。综上,在日粮中添加枯草芽孢杆菌可提高猪肉的抗氧化能力、改善猪肉在高氧气调包装中的肉色、抑制蛋白质和脂质氧化,提高猪肉的食用品质。

关键词：枯草芽孢杆菌猪肉抗氧化能力脂质氧化蛋白质氧化

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大庆油田套损井大规模压裂工艺及配套工具

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石油钻采工艺 2018年第4期40卷 499-502页

作者：刘昕祝绍功李博睿王静于喆张宏岩中国石油大庆油田有限责任公司采油工程研究院中国石油大庆油田有限责任公司第五采油厂第一油矿九区三队

大庆油田累计套损井近万口,为了动用这些压裂程度低、剩余油相对富集的潜力井,开展了多级大规模压裂工艺研究。通过有限元软件分析胶筒肩部角度、长度与应力之间的关系,并通过油浸实验验证了胶筒在大形变下的耐温承压性能;应用自编软件... 详细信息

大庆油田累计套损井近万口,为了动用这些压裂程度低、剩余油相对富集的潜力井,开展了多级大规模压裂工艺研究。通过有限元软件分析胶筒肩部角度、长度与应力之间的关系,并通过油浸实验验证了胶筒在大形变下的耐温承压性能;应用自编软件优化调整关键部件尺寸,设计了工艺配套工具。最终确定了小直径封隔器胶筒肩部角度50°,长度550 mm;小直径喷砂器能够针对套管内径大于?104 mm的套损井进行施工,工艺覆盖率提升至70%;新型锚定工具可确保工具通过套损点并使管柱稳定;双功能防喷封隔器能够实现目的层封隔及油管防喷。现场试验结果表明,该工艺及配套工具能够用于套损井压裂,单趟管柱可压裂5层,砂量289 m3,初步实现了套损井大规模压裂施工。

关键词：套损井大规模压裂胶筒小直径封隔器

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Detection of the interictal epileptic discharges based on wavelet bispectrum interaction and recurrent neural network

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Science China(Information Sciences) 2021年第6期64卷 203-221页

作者： Nabil SABOR Yongfu LI zhe zhang yu PU Guoxing WANG Yong LIAN Department of Micro-Nano Electronics Shanghai Jiao Tong University Electrical Engineering Department Assiut University MoE Key Lab of Artificial Intelligence Shanghai Jiao Tong University Alibaba DAMO Academy

Detection of interictal epileptic discharges(IED) events in the EEG recordings is a critical indicator for detecting and diagnosing epileptic seizures. We propose a key technology to extract the most important features related to epileptic seizures and identifies the IED events based on the interaction between frequencies of EEG with the help of a two-level recurrent neural network. The proposed classification network is trained and validated using the largest publicly available EEG dataset from Temple University *** results clarified that the interaction between β and β bands, β and γ bands, γ and γ bands,δ and δ bands, θ and α bands, and θ and β bands have a significant effect on detecting the IED ***, the obtained results showed that the proposed technique detects 95.36% of the IED epileptic events with a false-alarm rate of 4.52% and a precision of 87.33% by using only 25 significant features. Furthermore,the proposed system requires only 164 ms for detecting a 1-s IED event which makes it suitable for real-time applications.

关键词： interictal epileptic discharges epilepsy discrete wavelet transform wavelet bispectrum long short-term memory recurrent neural network

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Preparation of Ag3PO4/AgBr Hybrids Using a Facile Grinding Method and Their Applications as Photocatalysts

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Chemical Research in Chinese Universities 2018年第4期34卷 649-654页

作者： zhang Xiaojun YAN Keqiang SONG yu WANG zhe WU Jialong yu Dayu Sci-Tech Center for Clean Conversion and High-valued Utilization of Biomass Northeast Electric Power University Jilin 132012 R R. China

Highly efficient visible-light-induced Ag3PO4/AgBr hybrids were prepared via a facile and effective grinding method. The synthetic route was simply achieved through the grinding of Ag3PO4 with NaBr in an agate mortar at room temperature. During the grinding process, the mechanochemical effect induced the solid-state reaction of Ag3PO4 and NaBr to form AgBr nanoparticles on the surface of the Ag3PO4 particles. After calcination and washing, Ag3POdAgBr hybrids were obtained. The AgBr shells prevented photocorrosion and improved the structural stability in water. Interestingly, the compositions, morphologies and optical absorption properties of the Ag3PO4/AgBr hybrids could be fmely controlled by adjusting the NaBr content and grinding time. The photocatalytic activities of the as-prepared samples were investigated in terms of the degradation of rhodamine B（RhB） under visible light irradiation. The photocatalytic activities of the Ag3POn/AgBr hybrids were much improved compared to those of of Ag3PO4 or AgBr individually. Under visible light irradiation for 1 h, the Ag3PO4/AgBr hybrids exhibited a 66.8%-76.8% increase in photocatalytic efficiency compared to pure Ag3PO4.

关键词： Ag3PO4 AgBr Photocatalytic activity Grinding method

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Experimental Investigation of fluid-structure interaction of composite hydrofoils in cavitating flow

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Journal of Hydrodynamics 2022年第2期34卷 207-213页

作者： Hou-sheng zhang Zhi-pu Guo Qin Wu Han-zhe zhang Guo-yu Wang School of Mechanical Engineering Beijing Institute of TechnologyBeijing100081China Aviation Engineering School Air Force Engineering UniversityXian710038China

This paper experimentally studies the cavitating fluid-structure interaction of composite hydrofoils with different ply *** synchronous measurement system with high-speed camera and for laser Doppler vibrometer(LDV),the feedback pressure regulation system,and the flow rate control system are *** experimental results of the cavitation evolution show that,compared with the rigid hydrofoil,the composite hydrofoils with+45°ply angle and 0°ply angle accelerate the cavitation inception,and the composite hydrofoil with−45°ply angle delays the cavitation *** the same cavitation number,the cloud cavitation of the+45°laminated hydrofoil is the most severe,followed by that of the 0°laminated hydrofoil,and that of the−45°laminated hydrofoil is relatively weak and close to that of the rigid *** analyses of the structural vibration of the composite hydrofoils in different cavitation stages show that the three composite hydrofoils have no significant vibration at the incipient cavitation and the supercavitation,but relatively significant vibration is observed in the sheet and cloud *** vibration amplitude of the composite hydrofoil with+45°ply angle is the largest,followed by those of the−45°,0°laminated *** the sheet cavitation,the dominant frequencies of the structural vibration velocity of the+45°laminated hydrofoil and the−45°laminated hydrofoil are the first and second modal frequencies,but no explicit dominant frequency is observed for the 0°laminated *** the cloud cavitation,the dominant frequencies of the three composite hydrofoils mainly include the first modal frequency,the second modal frequency,and the cavity shedding frequency.

关键词： Cavitation fluid-structure interaction composite hydrofoil cavity induced vibration

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Genetic characterization and potential molecular dissemination mechanism of tet(31) gene in Aeromonas caviae from an oxytetracycline wastewater treatment system

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Journal of Environmental Sciences 2019年第2期31卷 259-266页

作者： Yanhong Shi zhe Tian Sébastien Olivier Leclercq Hong zhang Min Yang yu zhang State Key Laboratory of Environmental Aquatic Chemistry Research Centre for Eco-Environmental SciencesChinese Academy of Sciences University of Chinese Academy of Sciences INRA UMR1282 Infectiology and Public Health Fran?ois Rabelais University UMR1282 Infectiology and Public Health

Recently, the rarely reported tet(31) tetracycline resistance determinant was commonly found in Aeromonas salmonicida, Gallibacterium anatis, and Oblitimonas alkaliphila isolated from farming animals and related environment. However, its distribution in other bacteria and potential molecular dissemination mechanism in environment are still unknown. The purpose of this study was to investigate the potential mechanism underlying dissemination of tet(31) by analysing the tet(31)-carrying fragments in A. caviae strains isolated from an aerobic biofilm reactor treating oxytetracycline bearing wastewater. Twenty-three A. caviae strains were screened for the tet(31) gene by polymerase chain reaction(PCR). Three strains(two harbouring tet(31), one not) were subjected to whole genome sequencing using the PacBio RSII platform. Seventeen A. caviae strains carried the tet(31) gene and exhibited high resistance levels to oxytetracycline with minimum inhibitory concentrations(MICs)ranging from 256 to 512 mg/L. tet(31) was comprised of the transposon Tn6432 on the chromosome of A. caviae, and Tn6432 was also found in 15 additional tet(31)-positive A. caviae isolates by PCR. More important, Tn6432 was located on an integrative conjugative element(ICE)-like element, which could mediate the dissemination of the tet(31)-carrying transposon Tn6432 between bacteria. Comparative analysis demonstrated that Tn6432 homologs with the structure ISCR2-ΔphzF-tetR(31)-tet(31)-ΔglmM-sul2 were also carried by A. salmonicida, G. anatis, and O. alkaliphila, suggesting that this transposon can be transferred between species and even genera. This work provides the first report on the identification of the tet(31) gene in A. caviae, and will be helpful in exploring the dissemination mechanisms of tet(31) in water environment.

关键词： Aeromonas caviae tet(31) gene ISCR2 ICE-like element Wastewater

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Multi-Gradient Routing Protocol for Wireless Sensor Networks

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China Communications 2017年第3期14卷 118-129页

作者： Ying Qiu Shining Li Zhigang Li yu zhang zhe Yang School of Computer Northwestern Polytechnical University Xi'an 710072 China

Sensor networks tend to support different traffic patterns since more and more emerging applications have diverse needs. We present MGRP, a Multi-Gradient Routing Protocol for wireless sensor networks, which is fully distributed and efficiently supports endto-end, one-to-many and many-to-one traffic patterns by effectively construct and maintain a gradient vector for each node. We further combine neighbor link estimation with routing information to reduce packet exchange on network dynamics and node failures. We have implemented MGRP on Tiny OS and evaluated its performance on real-world testbeds. The result shows MGRP achieves lower end-to-end packet delay in different traffic patterns compared to the state of the art routing protocols while still remains high packet delivery ratio.

关键词： wireless sensor network routing protocol multi-gradient end-to-end traffic pattern

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Car Fuel Economy Simulation Forecast Method Based on CVT Efficiencies Measured from Bench Test

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Chinese Journal of Mechanical Engineering 2018年第5期31卷 138-153页

作者： yu-Long Lei yu-zhe Jia Yao Fu Ke Liu Ying zhang zhen-Jie Liu State Key Laboratory of Automotive Simulation and Control Jilin University Faw Jiefang Automotive Co. Ltd United Automotive Electronic Systems Co. Ltd China North Vehicle Research Institute

Researchers face di culties in studying the e ects of driveline e ciency on car fuel economy via bench and road tests because of long working periods, high costs, and heavy workloads. To simplify the study process and shorten test cycles, a car fuel economy simulation forecast method for combining computer simulation forecasting with bench tests is proposed. Taking a continuously variable transmission(CVT) as the research object, a transmission e ?ciency model based on a bench test is constructed. An optimal economic variogram based on the original CVT vari?ogram, the boundary conditions of vehicle performance, the road conditions and the driving behavior of the driver is generated in the Gear Shift Program(GSP)?Generation module in AVL Cruise. And on this basis a driveline simulation model that can calculate the fuel consumption based on the driveline data of a test car is built. The model is used to forecast fuel consumption and calculate real?time CVT e ciency under di erent conditions. Contrastive analyses on simulation results and real car drum test results are made. The largest error between simulation results and drum test results in driving cycles is 4.099%, which is 5.449% under constant velocity condition in driver control mode and 4.2% under constant velocity condition in automatic cruise mode. The results confirm the feasibility of the method and the good performance of the driveline simulation model in accurately forecasting fuel consumption. The method can e ciently investigate the e ects of driveline e ciency on car fuel economy. Moreover, this research provides instruc?tion for accurately forecasting fuel economy as well as references for studies on the e ects of drivelines on car fuel economy.

关键词： Fuel economy CVT efficiency Simulation forecast Driveline

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Monitoring of 943 organic micropollutants in wastewater from municipal wastewater treatment plants with secondary and advanced treatment processes

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Journal of Environmental Sciences 2018年第5期30卷 309-317页

作者： Juan Wang zhe Tian Yingbin Huo Min Yang Xingcan zheng yu zhang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China North China Municipal Engineering Design&Research Institute Tianjin 300074China University of Chinese Academy of Sciences Beijing 100049China

To perform a systematic survey on the occurrence and removal of micropollutants during municipal wastewater treatment, 943 semi-volatile organic chemicals in 32 wastewater samples including influents of secondary treatments, secondary effluents and final effluents（effluents of advanced treatments）, which were collected from seven full-scale municipal wastewater treatment plants（MWTPs） in China, were examined by gas chromatography-mass spectrometry（GC-MS） coupled with an automated identification and quantification system with a database（AIQS-DB）. In total, 196 and 145 chemicals were detected in secondary and final effluents, respectively. The majority of the total concentrations（average removal efficiency, 87.0%±5.9%） of the micropollutants were removed during secondary treatments. However, advanced treatments achieved different micropollutant removal extents from secondary effluents depending on the different treatment processes employed. Highly variable removal efficiencies of total concentrations（32.7%–99.3%） were observed among the different advanced processes. Among them,ozonation-based processes could remove 70.0%–80.9% of the total concentrations of studied micropollutants. The potentially harmful micropollutants, based on their detection frequency and concentration in secondary and final effluents, were polycyclic aromatic hydrocarbons（PAHs）（2-methylnaphthalene, fluoranthene, pyrene, naphthalene and phenanthrene）, phosphorus flame retardants（tributyl phosphate（TBP）, tris（2-chloroethyl）phosphate（TCEP） and tris（1,3-dichloro-2-propyl） phosphate（TDCP））, phthalates（bis（2-ethylhexyl）phthalate（DEHP））, benzothiazoles（benzothiazole,2-（methylthio）-benzothiazol, and 2（3H）-benzothiazolone） and phenol. This study indicated that the presence of considerable amounts of micropollutants in secondary effluent creates the need for suitable advanced treatment before their reuse.

关键词： Automated identification andquantification system Municipal wastewater treatment Organic micropollutants Secondary treatment Advanced treatment

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