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Diagenetic evolution of clastic reservoirs and its records in fine subsection:significance and application

Acta Geochimica 2022年第5期41卷 887-892页

作者： manwei Zhang Hongjing Zhao Taiju yin Wendao Qian Anxin mei Fan Liu Hubei Key Laboratory of Petroleum Geochemistry and Environment Yangtze UniversityWuhanHubeiChina School of Geosciences Yangtze UniversityWuhanHubeiChina College of marine Science and Technology China University of GeosciencesWuhanHubeiChina School of Environment and Resource Xichang UniversityXichangSichuanChina Chuanqing Drilling Engineering Company Limited Sulige Project management Department Sichuan Chengdu ChengduChina

It was showed that understanding of the diagenetic modifications and its associated products in the deeply to ultra-deeply buried tight sandstone reservoirs(DUDTSR)is great important for reservoir characterization and hydrocarbon ***,the fine characterization of diagenetic evolution via geologic modelling in tight sandstones remains a great challenge as for complexity of lithology,temperature,pressure and formation fluid throughout the entire life cycle of tight sandstone *** help get a comprehensive idea of the distribution of diagenetic processes on the formation of DUDTSR in the long geological period,type-I and type-II fine sections of diagenetic stage for clastic reservoirs were creatively proposed and its essence was illustrated using the Paleogene Huagang(EH)Formation in the southern Xihu *** combination of both quantitative and qualitative methods which began with current formation temperature,vitrinite analysis,illite and I/S mixed layers based on analytical testing of the EH Formation,(1)Paleotemperature(T),vitrinite reflectivity and smectite in mixed layer during burial processes were restored based on numerical analysis,(2)The accurate division of diagenetic evolution was identified from coarse to fine process using new model,(3)And finally the geological significance of fine division of the conventional diagenetic stage was illustrated for low-porosity and tight sandstone reservoirs.

关键词： Tight sandstone reservoirs Diagenetic evolution Fine subsection Significance

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Synthesis and properties of physically crosslinked poly (vinyl alcohol) hydrogels

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Journal of China University of Mining and Technology 2008年第2期18卷 271-274页

作者： ma Ru-yin XIONG Dang-sheng Department of materials Science ＆ Engineering Nanjing University of Science and Technology Nanjing Jiangsu 210094 China

The present study is an investigation of the properties of poly(vinyl alcohol),which would be a better contact lens mate- rial than conventional HEma in some ways.A transparent PVA hydrogel was prepared from a PVA solution in a mixed solvent consisting of water and a water-miscible organic solvent,DMSO,by the freezing-thawing *** water content,visible light transmittance,mechanical and swelling properties of the hydrogels were evaluated as a function of PVA concentration and number of freeze-thaw *** results show that the properties of PVA hydrogels depend on the polymer concentration,the number of freeze-thaw cycles and the addition of the organic solvent.

关键词： poly (vinyl alcohol) hydrogel freezing-thawing method swelling property

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The Spatiotemporal Dynamic Distributions of New Tuberculosis in Hangzhou,China

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Biomedical and Environmental Sciences 2020年第4期33卷 277-281页

作者： ZENG mei Chun JIA Qing Jun HUANG yin Yan Department of Pathology The First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 310003ZhejiangChina Hangzhou Center for Disease Control and Prevention Hangzhou 310021ZhejiangChina

Pulmonary tuberculosis(TB)remains a global health threat worldwide,despite the availability of effective antibiotics for drug-sensitive TB for *** is in part due to the ongoing transmission from cases of undiagnosed TB[1]and drug-resistant TB(DR-TB)[1].China has the second largest number of multidrug-resistant TB(MDR-TB)cases worldwide,which is estimated at 73,000 MDRTB or rifampicin-resistant TB(RR-TB)cases and accounts for 13%of the global burden[1].The results of China’s Fifth National TB Epidemiological Survey indicated that the prevalence of TB in the western region was more than three times the eastern region.

关键词： cases tuberculosis prevalence

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CYP27A1 mutation in a case of cerebrotendinous xanthomatosis:A case report

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World Journal of Clinical Cases 2022年第18期10卷 6168-6174页

作者： Zhao-Ran Li Yu-Ling Zhou Qi Jin yin-yin Xie Hong-mei Meng Department of Neurology The First Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina

BACKGROUND Cerebrotendinous xanthomatosis(CTX)is a rare autosomal recessive metabolic disease caused by mutations in CYP27 *** has a low incidence rate,insidious onset,and diverse clinical *** can be easily misdiagnosed and can go unrecognized by clinicians,leading to delayed treatment and worsened patient *** SUMmaRY A 38-year-old male was admitted to our hospital with a history of unabating unstable posture and difficulty in walking for more than 30 *** based on the patient’s medical history,clinical symptoms,magnetic resonance imaging and gene sequencing results,he was finally diagnosed with *** to the low incidence rate of the disease,clinicians have insufficient knowledge of it,which makes the diagnosis process more tortuous and prolongs the diagnosis *** Prompt diagnosis and treatment of CTX improve patient outcomes.

关键词： Cerebrotendinous xanthomatosis CYP27A1 Sterol 27-hydroxylase c.380G> c.1563dup A Case report

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Microstructure and corrosion behavior of the heat affected zone of a stainless steel 308L-316L weld joint

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Journal of materials Science & Technology 2018年第10期34卷 1823-1834页

作者： Cheng ma Qunjia Peng Jinna mei En-Hou Han Wei Ke Key Laboratory of Nuclear materials and Safety Assessment. Institute of Metal Research Chinese Academy of Science Shenyang 110016 China University of Chinese Academy of Sciences Beifing 100049 China Suzhou Nuclear Power Research Institute Suzhou 215004 China

Microstructure of the heat affected zone （HAZ） of a 308L-316L stainless steel （SS） weld joint and its corrosion behavior in high temperature water were studied. Peak of the residual strain was observed to approach to the fusion boundary in the HAZ while the strain increased from the top to root areas of the HAZ. The root area of the HAZ shows a lower corrosion resistance in high temperature water than the top and middle areas of the HAZ. This is attributed to a higher level of residual strain in association with a higher density of tangled dislocations in the top area of the HAZ. The results suggest that the residual strain in the HAZ could also promote the SCC through its effect on corrosion, in addition to that on the local microstructure and mechanical property of the steel.

关键词： Stainless steel HAZ Weld joint Corrosion High temperature water

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Dewetting Behavior of Hydrogen Bonded Polymer Complex Film under Hydrothermal Condition

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Chinese Journal of Polymer Science 2018年第9期36卷 1036-1042页

作者： Chao Su Song-mei ma Geng-Xin Liu Shu-Guang Yang State Key Laboratory for Modification of Chemical Fibers and Polymer materials Center for Advanced Low-dimension Materials College of Material Science and Engineering Donghua University Department of Polymer Science The University of Akron

Hydrogen-bonded polymer complex films with the thickness ranging from 50 nm to 2400 nm were prepared by layer-by-layer （LbL） assembly of poly（2-ethyl-2-oxazoline）（PEOX） and poly（acrylic acid）（PAA）. The dewetting behavior of PEOX/PAA films under hydrothermal condition was investigated. It was found that the dewetting occurred at solid-liquid interface, and the typical morphologies such as holes, irregular cellular structure, and droplets were observed. Atomic force microscopy （AFM） revealed the initial rupture of the film. Microscopic Raman and infrared （IR） imaging demonstrated that the PEOX and PAA chains remained association during the dewetting process.

关键词： Hydrogen-bonding Polymer complex Dewetting

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A New Model of Ferroelectric Phase Transition with Neglectable Tunneling Effect

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Chinese Physics Letters 2019年第7期36卷 14-18页

作者： Hong-mei yin Heng-Wei Zhou Yi-Neng Huang National Laboratory of Solid State Microstructures School of Physics Nanjing University Nanjing 210093 Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed matters College of Physical Science and Technology Yili Normal University Yining 835000

Due to the obvious deviations of the existing theoretical models from the experimental results of ferroelectric phase transition, a new model is proposed on the basis of the coupling between spontaneous polarization and spontaneous strain in ferroelectrics. The spontaneous polarization and specific heat of ferroelectric phase transition predicted by the model are in better agreement with the corresponding data of triglyceride sulfate, a typical *** addition, the model predicts a new type of ferroelectric in which a phase transition and a phase-like transition coexist.

关键词： Due to the obvious deviations theoretical models transition coexist

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Immobilization of acetylcholinesterase on functionalized SBA-15 mesoporous molecular sieve for detection of organophosphorus and carbamate pesticide

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Chinese Chemical Letters 2018年第9期29卷 1387-1390页

作者： yin Rui Xiaomei Wu Baodi ma Yi Xu School of Chemical and Environmental Engineering Shanghai Institute of Technology

The immobilization of acetylcholinesterase （ACHE） on amino functionalized SBA-15 mesoporous sieves （NH2-SBA-15） was explored for detection of organophosphorus and carhamate pesticides. Several methods have been studied and the ＂adsorption-crosslinking＂ is found to be the best one. Firstly, AChE and bovine serum albumin （BSA） were adsorbed in turn on the surface of NH2-SBA-15 by electrostatic adsorption, and then glutaraldehyde was added for cross-linking the amino group of AChE. The NH2-SBA- 15 showed around 95% immobilization efficiency and the specific activity of immobilized AChE （ACHE- NH2-SBA-15） reached 130% relative to free AChE under optimal immobilization conditions. It was found AChE-NH2-SBA-15 retained 94.0% and 82.8% of its initial activity after 60days at 4℃ and 25℃, respectively. It remained 55.0% of its initial activity after 6 times recycling. During the detection of pesticide, the AChE-NH2-SBA-15 showed wider linear range and much lower limit of detection compared with free ACHE. The current method showed good recovery （93.8%-109.3%） and low RSD （〈5%） for both standard solution and real vegetable samples of Carbaryl and Trichlorfon. It was believed that AChE-NH2- SBA- 15 could be exploited as a fast, sensitive and low-cost biocatalyst towards the detection of pesticides residues which could be stored at room temperature for a long time.

关键词： Acetylcholinesterase Immobilization Adsorption-crosslinking Mesoporous SBA-15 molecular sieve Pesticide residues detection

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Some characteristics of X-ray imaging for energy region of over 100 keV using plastic scintillation fiber array

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Nuclear Science and Techniques 2007年第3期18卷 172-175页

作者： TANG Shibiao ma Qingli yin Zejie HUANG Huan Department of Modern Physics University of Science and Technology of China Hefei 230026 China Electronics Department Electronic Engineering Institute Hefei 230038 China

In this work, characteristics of using PSFs (plastic scintillation fibers) coupled with CCD (charge-coupled devices ) to build area detectors for high energy X-ray imaging are studied with a Monte Carlo simulation, which cover an energy range of a few hundred keV to about 20 MeV. It was found that the efficiency of PSF in detecting X-ray with energy above a few hundred keV is low. We can use large incident flux to increase the output signal to noise ratio (SNR). The performance can also be improved by coating PSF with X-ray absorption layers and the MTF of the system is presented. By optimizing the absorption layer thickness, the crosstalk of the area detector built with PSF decreases.

关键词：塑料发光纤维 X射线成像信噪比 SNR

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Determination of spatial resolution of plastic scintillation fiber array with a simple method

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Nuclear Science and Techniques 2007年第2期18卷 111-114页

作者： TANG Shibiao ma Qingli yin Zejie HUANG Huan Department of Modern Physics University of Science and Technology of China Hefei 230027 China Electronics Department Electronic Engineering Institute Hefei 230038 China

The spatial resolution of a position sensitive gamma-ray detector configuration based on plastic scintillation fiber array was measured using a Monte Carlo simulation method. Both point spread function and modulation transfer function (MTF) were presented. The factors that influence the spatial resolution were also discussed. The results of the simulation showed that the intrinsic spatial resolution was consistent with the size of the physical pixels and a few centimeters spatial resolution could be obtained under certain circumstances.

关键词：塑料闪烁光纤阵空间分辨率测定简单方法

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