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Research on thermal insulation materials properties under HTHP conditions for deep oil and gas reservoir rock ITP-Coring

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Petroleum Science 2024年第4期21卷 2625-2637页

作者： Zhi-Qiang he he-Ping Xie Ling Chen Jian-Ping Yang Bo Yu Zi-jie Wei ming-Zhong Gao State Key Laboratory of Intelligent Construction and healthy Operation and Maintenance of Deep Underground Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065SichuanChina Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen518060GuangdongChina School of Mechanical Engineering Sichuan UniversityChengdu610065SichuanChina College of Polymer Science and Engineering Sichuan UniversityChengdu610065SichuanChina

Deep oil and gas reservoirs are under high-temperature conditions,but traditional coring methods do not consider temperature-preserved measures and ignore the influence of temperature on rock porosity and permeability,resulting in distorted resource *** development of in situ temperaturepreserved coring(ITP-Coring)technology for deep reservoir rock is urgent,and thermal insulation materials are ***,hollow glass microsphere/epoxy resin thermal insulation materials(HGM/EP materials)were proposed as thermal insulation *** materials properties under coupled hightemperature and high-pressure(HTHP)conditions were *** results indicated that high pressures led to HGM destruction and that the materials water absorption significantly increased;additionally,increasing temperature accelerated the *** temperatures directly caused the thermal conductivity of the materials to increase;additionally,the thermal conduction and convection of water caused by high pressures led to an exponential increase in the thermal *** temperatures weakened the matrix,and high pressures destroyed the HGM,which resulted in a decrease in the tensile mechanical properties of the *** materials entered the high elastic state at 150℃,and the mechanical properties were weakened more obviously,while the pressure led to a significant effect when the water absorption was above 10%.Meanwhile,the tensile strength/strain were 13.62 MPa/1.3%and 6.09 MPa/0.86%at 100℃ and 100 MPa,respectively,which meet the application requirements of the self-designed coring ***,K46-f40 and K46-f50 HGM/EP materials were proven to be suitable for ITP-Coring under coupled conditions below 100℃ and 100 *** further improve the materials properties,the interface layer and EP matrix should be *** results can provide references for the optimization and engineering application of materials and thus technical support for deep oil and gas resourc

关键词： Deep oil and gas reservoir rock In situ temperature-preserved coring(ITPCoring) Hollow glass microsphere/epoxy resin thermal insulation materials(HGM/EP materials) High-temperature and high-pressure(HTHP) Physical and mechanical properties

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Nephrocyte-neurocyte interaction and cellular metabolic analysis on membrane-integrated microfluidic device

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Science China Chemistry 2016年第2期59卷 243-250页

作者： Qichen Zhuang Shiqi Wang jie Zhang Ziyi he Haifang Li Yuan Ma Jin-ming Lin Beijing Key Laboratory of Microanalytical Methods and Instrumentation Department of Chemistry Tsinghua university Beijing 100084 China The Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology Tsinghua University Beijing 100084 China

Cell-cell interaction and cell metabolic analysis provide new opportunities for better understanding of critical biochemical processes. Advanced microfluidic technologies enable to create more realistic in vitro microenvironment by spatial and temporal control of cell growth and co-culture. In this work, we design a microfluidic device to achieve the co-culture of PC12 cells and 293 cells, and study in vitro cell-cell interaction via cell metabolic analysis by mass spectrometry. The membraneintegrated microfluidic device was firstly used for cell co-culture, and the cellular metabolite was further investigated by mass spectrometer(MS). Our results showed that the differentiation of PC12 cells could be successfully induced by m NGF and also greatly influenced by the microchannel treatment of fetal bovine serum(FBS) solution. The identification of cell morphology, microtubule-associated protein 2(MAP-2) expression and viability of differentiated PC12 cells were conducted before 293 cells being introduced into the top microfluidic channels and stimulated to secrete cell metabolism products. The developed microfluidic device is a potentially useful tool for high throughput of cell-cell interaction study.

关键词： cell-cell interaction cellular metabolic analysis microfluidic mass spectrometry

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D2ANet:Difference-aware attention network for multi-level change detection from satellite imagery

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Computational Visual Media 2023年第3期9卷 563-579页

作者： jie Mei Yi-Bo Zheng ming-ming Cheng TMCC CSNankai UniversityTianjin 300350China State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China

Recognizing dynamic variations on the ground,especially changes caused by various natural disasters,is critical for assessing the severity of the damage and directing the disaster ***,current workflows for disaster assessment usually require human analysts to observe and identify damaged buildings,which is labor-intensive and unsuitable for large-scale disaster *** this paper,we propose a difference-aware attention network(D2ANet)for simultaneous building localization and multi-level change detection from the dual-temporal satellite *** the differences in different channels in the features of pre-and post-disaster images,we develop a dual-temporal aggregation module using paired features to excite change-sensitive channels of the features and learn the global change *** the nature of building damage caused by disasters is diverse in complex environments,we design a difference-attention module to exploit local correlations among the multi-level changes,which improves the ability to identify damage on different *** experiments on the large-scale building damage assessment dataset xBD demonstrate that our approach provides new state-of-the-art *** code is publicly available at https://***/mj129/D2ANet.

关键词： change detection building localization sate-llite imagery dual-temporal aggregation difference attention

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Electron Beam-Physical Vapor Deposited TiAl-based Laminated Composite Sheet with Nb Layer Toughening

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Chinese Journal of Aeronautics 2006年第B12期19卷 5-8页

作者： ZHANG De-ming CheN Gui-qing HAN jie-cai MENG Song-he Center for Composite Materials Harbin Institute of Technology Harbin 150080 China

The TiAl-based laminated composite sheet of 150 mm × 100 mm × 0.2 mm, with 24 TiAl layers and 23 Nb layers laid alternately one on another, was successfully fabricated using the electron beam-physical vapor deposition （EB-PVD） method. The microstructure and properties of the sheet were investigated on an atomic force microscope （AFM）, a scanning electron microscope （SEM） and a tensile testing machine. The results indicate that the evenly distributed Nb layers are well joined with the TiAl layers, and the interfaces between layers are transparent, and every interlayer spacing is of about 8μm. The fractures appear to be a mixture of intergranular fractures and somewhat ductile quasi-cleavage ones. Despite its slight influence on ultimate tensile strength, the inserts of Nb layers efficiently increase the room temperature ductility of TiAl-based alloys due to the crack deflection effect.

关键词： EB-PVD TiAl-based alloys sheet TiAl/Nb laminated composites microstructure and properties

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Comparison of the anti-apoptotic effects of 15-and 35-minute suspended moxibustion after focal cerebral ischemia/reperfusion injury

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Neural Regeneration Research 2018年第2期13卷 257-264页

作者： Ai-jiao Xiao Lin he Xin Ouyang jie-min Liu ming-ren Chen School of Basic Medical Science Jiangxi University of Traditional Chinese Medicine School of Moxibustion Jiangxi University of Traditional Chinese Medicine

heat-sensitive suspended moxibustion has a neuroprotective effect against focal cerebral ischemia/reperfusion injury, but the underly- ing mechanisms remain unclear. The duration of heat-sensitive suspended moxibustion （usually from 30 minutes to 1 hour） is longer than traditional suspended moxibustion （usually 15 minutes）. However, the effects of 15- and 35-minute suspended moxibustion in rats with cerebra/ischemia/reperfusion injury are poorly understood. In this study, we performed 15- or 35-minute suspended moxibustion at acupoint Dazhui （GV14） in an adult rat model of focal cerebral ischemia/reperfusion injury. Infarct volume was evaluated with the 2,3,5-triphenyltetrazolium chloride assay. Histopathological changes and neuronal apoptosis at the injury site were assessed by hematoxy- lin-eosin staining and terminal deoxynucleotidyl transferase dUTP nick end labeling assay. Caspase-9 and caspase-3 expression at the in- jury site was detected using immunofluorescent staining. Bax and Bcl-2 expression at the injury site was assessed using western blot assay. In the 35-minute moxibustion group, infarct volume was decreased, neuronal apoptosis was reduced, caspase-9, caspase-3 and Bax expres- sion was lower, and Bcl-2 expression was increased, compared with the 15-minute moxibustion group. Our findings show that 35-minute moxibustion has a greater anti-apoptotic effect than 15-minute moxibustion after focal cerebral ischemia/reperfusion injury.

关键词： nerve regeneration suspended moxibustion middle cerebral artery occlusion cerebral ischemia/reperfusion injury infarct volume apoptosis Bcl-2 Bax caspase-9 caspase-3 neural regeneration traditional Chinese medical therapy

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Adaptive optics scanning laser ophthalmoscopy in fundus imaging, a review and update

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International Journal of Ophthalmology(English edition) 2017年第11期10卷 1751-1758页

作者： Bing Zhang Ni Li jie Kang Yi he Xiao-ming Chen Department of Ophthalmology West China Hospital Sichuan University Institute of Optics and Electronics Chinese Academy of Sciences

Adaptive optics scanning laser ophthalmoscopy（AOSLO） has been a promising technique in funds imaging with growing popularity. This review firstly gives a brief history of adaptive optics（AO） and AO-SLO. Then it compares AO-SLO with conventional imaging methods（fundus fluorescein angiography, fundus autofluorescence, indocyanine green angiography and optical coherence tomography） and other AO techniques（adaptive optics flood-illumination ophthalmoscopy and adaptive optics optical coherence tomography）. Furthermore, an update of current research situation in AO-SLO is made based on different fundus structures as photoreceptors（cones and rods）, fundus vessels, retinal pigment epithelium layer, retinal nerve fiber layer, ganglion cell layer and lamina cribrosa. Finally, this review indicates possible research directions of AO-SLO in future.

关键词： adaptive optics scanning laser ophthalmoscopy retina fundus imaging

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Real-time programmable coding metasurface antenna for multibeam switching and scanning

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Chinese Physics B 2022年第9期31卷 260-267页

作者： Jia-Yu Yu Qiu-Rong Zheng Bin Zhang jie he Xiang-ming Hu jie Liu Information and Navigation College Air Force Engineering UniversityXi'an 710077China

Novel electromagnetic wave modulation by programmable dynamic metasurface promotes the device design freedom,while multibeam antennas have sparked tremendous interest in wireless communications.A programmable coding antenna based on active metasurface elements(AMSEs)is proposed in this study,allowing scanning and state switching of multiple beams in real *** obtain the planar array phase distribution in quick response,the aperture field superposition and discretization procedures are *** the need for a massive algorithm or elaborate design,this electronically controlled antenna with integrated radiation and phase-shift functions can flexibly manipulate the scattering state of multiple beams under field-programmable gate array(FPGA)*** and experimental results show that the multiple directional beams dynamically generated in the metasurface upper half space have good radiation performance,with the main lobe directions closely matching the predesigned *** metasurface antenna has great potential for future applications in multitarget radar,satellite navigation,and reconfigurable intelligent metasurfaces.

关键词： programmable coding metasurface multibeam modulation real-time control antenna

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Advances in Phytochemistry and Modern Pharmacology of Saposhnikovia Divaricata(Turcz.)Schischk

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Chinese Journal of Integrative Medicine 2023年第11期29卷 1033-1044页

作者： GAO Jun-wen ZHAN Yang WANG Yun-he ZHAO Shu-jie HAN Zhong-ming College of Resources and Environment Jilin Agricultural UniversityChangchun(130118)China Information Center Jilin Agricultural UniversityChangchun(130118)China College of Chinese Medicinal Materials Jilin Agricultural UniversityChangchun(130118)China

Saposhnikovia divaricata(Turcz.)Schischk(***,Fangfeng)is a herb in the Apiaceae family,and its root has been used since the Western Han Dynasty(202 B.C.).Chromones and coumarins are the pharmacologically active substances in *** phytochemical and pharmacological studies have demonstrated their antipyretic,analgesic,anti-inflammatory,antioxidant,anti-tumor,and anticoagulant *** and analytical strategy theory advancements have yielded novel results;however,most investigations have been limited to the main active substances—chromones and ***,we reviewed studies related to the chemical composition and pharmacological activity of ***,analyzed the developing trends and challenges,and proposed that research should focus on components’synergistic *** also suggested that,the structure-effect relationship should be prioritized in advanced research.

关键词： coumarin synergistic priori

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Influence of mill scale and rust layer on the corrosion resistance of low-alloy steel in simulated concrete pore solution

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International Journal of Minerals,Metallurgy and Materials 2017年第1期24卷 64-74页

作者： Jin-jie Shi Jing ming Jiangsu Key Laboratory of Construction Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China

Electrochemical impedance spectroscopy, cyclic potentiodynamic polarization measurements, and scanning electron microscopy in conjunction with energy-dispersive X-ray spectroscopy were used to investigate the influence of mill scale and rust layer on the passivation capability and chloride-induced corrosion behaviors of conventional low-carbon（LC） steel and low-alloy（LA） steel in simulated concrete pore solution. The results show that mill scale exerts different influences on the corrosion resistance of both steels at various electrochemical stages. We propose that the high long-term corrosion resistance of LA steel is mainly achieved through the synergistic effect of a gradually formed compact, adherent and well-distributed Cr-enriched inner rust layer and the physical barrier protection effect of mill scale.

关键词： steel reinforced concrete low alloy steel low carbon steel steel corrosion corrosion resistance

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Geochemical characteristics and geological significance of chert nodules in Qixia formation,Pingding Mountain, lower Yangtze Plate

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Journal of Mountain Science 2021年第1期18卷 88-100页

作者： LI Jun CheN Lu-wang HAOChun-ming ZHANG jie CheN Song GUI he-rong School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230000China National Engineering Research Center of Coal Mine Water Hazard Controlling(Suzhou University) Suzhou 234000China School of Resources and Civil Engineering Suzhou UniversitySuzhou 234000China North China Institute of Science and Technology Xueyuan Street 467Sanhe 065201China

The Permian is an important period for the deposition of siliceous rocks on a global scale,but the genesis of chert is still *** better understand the mechanism of chert nodules deposition from Qixia Formation(P1q)(Lower Yangtze Plate,China),we analyzed the major,trace and rare earth elements of these chert nodule samples(CN)and surrounding rock samples(SR)using Inductively Coupled Plasma Mass Spectrometry(ICPMS)and X-ray fluorescence(XRF)*** redox state,siliceous sources and depositional environment analysis show that CN have higher contents of SiO2,Fe2O3 and MnO comparing with SR,and their geochemical properties are *** and rare earth elements characteristics reveal that nodules were deposited under the action of biochemistry in the basin,no terrigenous materials contamination was observed and the contribution of upwelling was *** Al/(Al+Fe+Mn),Fe/Ti and Al-Fe-Mn discrimination diagram indicated the chert nodules are influenced by hydrothermal *** from redox-sensitive elements such as Th,U,V and Sc suggests that nodules were deposited in a reducing *** the convective mixing of hydrothermal action and normal seawater,excessive dissolved silicon and nutrients are absorbed and precipitated by biological action,and then transported by upwelling to shallow water for *** the evidence comes from the trace elements enrichment characters,Rare earth elements and Y(REY)distribution patterns and La/La^(*),Ce/Ce^(*),Eu/Eu^(*),LREE/HREE,Y/Ho and∑REE characteristics.

关键词： Cherts nodule Geochemistry Siliceous limestone PingdingMountain Depositional environment Silica source

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