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Age-specific distribution of oculometric parameters and myopia in children aged 8-12y

International Journal of Ophthalmology(English edition) 2024年第10期17卷 1887-1897页

作者： Tao Tang Si-Tong Chen Heng zhao Kai Wang ming-wei zhao Department of Ophthalmology&Clinical Centre of Optometry Peking University People’s HospitalBeijing 100044China Institute of Medical Technology Peking University Health Science CenterBeijing 100083China College of Optometry Peking University Health Science CenterBeijing 100083China Eye Disease and Optometry Institute Peking University People’s HospitalBeijing 100044China Beijing Key Laboratory of the Diagnosis and Therapy of Retinal and Choroid Diseases Beijing 100044China National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina

AIM:To describe the distribution of ocular biometrics and to evaluate its associations with refractive error and to assess the contribution from ocular parameters to refractive error among Chinese myopic ***:This cross-sectional study evaluated subjects aged ***,ocular biometry,and cycloplegic autorefraction were performed on each *** equivalent refraction(SER)and ocular biometrics were assessed as a function of age and *** Pearson correlation analysis between SER and ocular biometrics was carried *** linear regression was performed to analyze the association between SER and ocular ***:A total of 689 out of 735 participants(321 boys,48.1%)were analyzed,with a mean SER of-2.98±1.47 diopter(D).Axial length(AL),anterior chamber depth(ACD),corneal radius of curvature(CR),horizontal visible iris diameter(HVID),central corneal thickness(CCT)and lens power(LP)showed normal *** AL,AL/CR ratio,ACD and CR increased from 8 to 12y of age,while SER and LP decreased,HVID and CCT remained *** was no difference in *** decreased by 0.929 D for every 1 mm increase in AL and decreased by 1.144 D for every 0.1 increase in AL/CR *** Pearson correlation coefficient between SER and AL was-0.538(P<0.01)and-0.747(P<0.01)between SER and AL/CR *** the SER variance,AL explained 29.0%,AL/CR ratio explained 55.7%,while AL,CR,ACD and LP explained 99.3%after adjusting for age and ***:The AL,CR,ACD and LP are the most important determinants of myopic refractive error during myopia progression.

关键词： myopia ocular biometry refractive error population-based study

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Supramolecular polymer-based gel fracturing fluid with a double network applied in ultra-deep hydraulic fracturing

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Petroleum Science 2024年第3期21卷 1875-1888页

作者： Yong-Ping Huang Yong Hu Chang-Long Liu Yi-Ning Wu Chen-wei Zou Li-Yuan Zhang ming-wei zhao Cai-Li Dai School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongPR China Shandong Key Laboratory of Oilfield Chemistry China University of Petroleum(East China)Qingdao 266580ShandongPR China SINOPEC Petroleum Exploration and Production Research Institute Beijing102206PR China CNOOC China Co Ltd Tianjin BranchTianjin300459PR China

A gel based on polyacrylamide,exhibiting delayed crosslinking characteristics,emerges as the preferred solution for mitigating degradation under conditions of high temperature and extended shear in ultralong *** viscosity/viscoelasticity of the fracturing fluid was required to maintain excellent proppant suspension properties before *** into account both the cost and the potential damage to reservoirs,polymers with lower concentrations and molecular weights are generally *** this work,the supramolecular action was integrated into the polymer,resulting in significant increases in the viscosity and viscoelasticity of the synthesized supramolecular polymer *** double network gel,which is formed by the combination of the supramolecular polymer system and a small quantity of Zr-crosslinker,effectively resists temperature while minimizing permeability damage to the *** results indicate that the supramolecular polymer system with a molecular weight of(268—380)×10^(4)g/mol can achieve the same viscosity and viscoelasticity at 0.4 wt%due to the supramolecular interaction between polymers,compared to the 0.6 wt%traditional polymer(hydrolyzed polyacrylamide,molecular weight of 1078×10^(4)g/mol).The supramolecular polymer system possessed excellent proppant suspension properties with a 0.55 cm/min sedimentation rate at 0.4 wt%,whereas the0.6 wt%traditional polymer had a rate of 0.57 cm/*** comparison to the traditional gel with a Zrcrosslinker concentration of 0.6 wt%and an elastic modulus of 7.77 Pa,the double network gel with a higher elastic modulus(9.00 Pa)could be formed only at 0.1 wt%Zr-crosslinker,which greatly reduced the amount of residue of the fluid after *** viscosity of the double network gel was66 m Pa s after 2 h shearing,whereas the traditional gel only reached 27 m Pa s.

关键词： Ultra-deep reservoir Gel fracturing fluid Double network Supramolecular polymer system Proppant suspension property

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Preparation and performance evaluation of the slickwater using novel polymeric drag reducing agent with high temperature and shear resistance ability

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Petroleum Science 2024年第2期21卷 1113-1121页

作者： ming-wei zhao Zhen-Feng Ma Cai-Li Dai weiWu Yong-Quan Sun Xu-Guang Song Yun-Long Cheng Xiang-Yu Wang National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao266580ShandongChina Shandong Key Laboratory of Oilfield Chemistry China University of Petroleum(East China)Qingdao266580ShandongChina Sinopec Shengli Oilfield Dongying257001ShandongChina Department of Chemical and Materials Engineering University of AlbertaEdmontonAB T6G 1H9Canada East China Petroleum Bureau of Sinopec Nanjing210011JiangsuChina

Slickwater fracturing fluids are widely used in the development of unconventional oil and gas resources due to the advantages of low cost,low formation damage and high drag reduction ***,their performance is severely affected at high *** reducing agent is the key to determine the drag reducing performance of *** this work,in order to further improve the temperature resistance of slickwater,a temperature-resistant polymeric drag reducing agent(PDRA)was synthesized and used as the basis for preparing the temperature-resistant *** slickwater system was prepared with the compositions of 0.2 wt%PDRA,0.05 wt%drainage aid nonylphenol polyoxyethylene ether phosphate(NPEP)and 0.5 wt%anti-expansion agent polyepichlorohydrindimethylamine(PDM).The drag reduction ability,rheology properties,temperature and shear resistance ability,and core damage property of slickwater were systematically studied and *** contrast to on-site drag reducing agent(DRA)and HPAM,the temperature-resistant slickwater demonstrates enhanced drag reduction efficacy at 90℃,exhibiting superior temperature and shear resistance ***,the drag reduction retention rate for the slickwater achieved an impressive 90.52%after a 30-min shearing ***,the core damage is only 5.53%.We expect that this study can broaden the application of slickwater in high-temperature reservoirs and provide a theoretical basis for field applications.

关键词： Unconventional resources Polymeric drag reducing agent Slickwater High drag reduction rate Temperature resistance

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Hydromassage of macular hole edges for large and persistent full-thickness macular holes

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International Journal of Ophthalmology(English edition) 2024年第3期17卷 551-557页

作者： Yi Cai Wen-Bo Liu Duo wei Xun Deng Xiao-Xin Li ming-wei zhao Xuan Shi Jian-Hong Liang Department of Ophthalmology Peking University People’s HospitalBeijing 100044China Eye Diseases and Optometry Institute Beijing 100044China Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases Beijing 100044China College of Optometry Peking University Health Science CenterBeijing 100044China Xiamen Eye Center of Xiamen University Xiamen 361102Fujian ProvinceChina Department of Ophthalmology the Second Hospital of Lanzhou UniversityLanzhou 730030Gansu ProvinceChina

●AIM:To introduce the macular hole(MH)hydromassage technique as a potentially beneficial approach for the treatment of large or persistent MH.●METHODS:This retrospective observational case series comprised 16 consecutive patients(17 eyes)diagnosed with *** criteria involved a hole aperture diameter larger than 600μm or the presence of an unclosed MH larger than 600μm following the previous *** MH repair procedures were administered in all cases,involving the manipulation and aspiration of the hole margin through the application of water flow with a soft-tip flute needle.A comprehensive assessment was conducted for each case before and after surgery,and optical coherence tomography(OCT)images were captured at every follow-up point.●RESULTS:The mean preoperative aperture diameter was 747±156μm(range 611-1180μm),with a mean base diameter of 1390±435μm(range 578-2220μm).Following surgery,all cases achieved complete anatomical closure of MH,with 13 cases(76.5%)exhibiting type 1 closure and 4 cases(23.5%)demonstrating type 2 *** significant differences were observed in the preoperative OCT variables between the two closure *** with type 1 closure showed a significantly improved visual acuity(0.70±0.10,range 0.50-0.80)compared to those with type 2 closure(0.90±0.12,range 0.80-1.00,P=0.014).●CONCLUSION:The MH hydromassage technique demonstrates promising results,achieving acceptable closure rates in cases of large or persistent *** technique may serve as an effective adjunctive maneuver during challenging MH surgery.

关键词： macular hole large macular hole persistent macular hole optical coherence tomography surgical technique hydromassage

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Endophthalmitis in silicone oil-filled eye: A case report

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World Journal of Clinical Cases 2024年第1期12卷 163-168页

作者： Hui-Chao Yan Ze-Lu Wang Wen-Zhen Yu ming-wei zhao Jian-Hong Liang Hong Yin Xuan Shi Heng Miao Department of Ophthalmology Peking University People’s HospitalBeijing 100044China

BACKGROUND Endophthalmitis occurring in silicone oil-filled eyes is a very rare occurrence,with reported incidence rates ranging between 0.07%and 0.039%.Traditional methods of management of infectious endophthalmitis include the removal of silicone oil,washout of the vitreous cavity,administration of intravitreal antibiotics,and reinjection of silicone *** SUMMARY Herein,we report the case of a 39-year-old man with unilateral endophthalmitis after pars plana vitrectomy and silicone oil *** injections of full-dose antibiotics and anterior chamber washout were used to treat the *** signs of retinal toxicity were observed during the follow-up *** Intravitreal full-dose antibiotic injections and anterior chamber washout are promising alternatives to traditional therapies for endophthalmitis in silicone oilfilled eyes.

关键词： Endophthalmitis Intravitreal injection Silicone oil-filled eye Pars plana vitrectomy Washout Case report

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Experimental investigation on migration and retention mechanisms of elastic gel particles(EGPs)in pore-throats using multidimensional visualized models

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Petroleum Science 2022年第5期19卷 2374-2386页

作者： Yi-Fei Liu Chen-wei Zou Xu-Guang Lou ming-wei Gao Guang zhao ming-wei zhao Cai-Li Dai Shandong Key Laboratory of Oilfield Chemistry(China University of Petroleum(East China)) Qingdao266580PR China Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao266580PR China China Southern Petroleum Exploration&Development Corporation HaikouHainan570216People's Republic of China

Knowledge of migration and retention mechanisms of elastic gel particles(EGPs)in pore-throats is essential for the effective application of EGPs as a smart sweep improvement and profile control agent for enhanced oil recovery(EOR).The matching coefficient(defined as the ratio of particle size to pore-throat size)is used to investigate its influence on migration,retention and profile control performance of EGPs.A 1-D continuous pore-throat visualization model(PTVM),a 2-D heterogeneous PTVM and a 3-D heterogeneous core model were constructed and used to investigate pore-scale migration,retention and controlling mechanism of migration and retention characteristics on EGPs profile *** results of the 1-D continuous PTVM indicated that while the matching coefficient was in the optimal range(i.e.,0.20-0.32),the EGPs could not only smoothly migrate to the deeper pore-throats,but also form stable retention in the pores to resist the erosion of injected water,which was conducive to the effective indepth profile *** results of the 2-D heterogeneous PTVM verified that the sweep efficiency in low-permeability regions could be significantly improved by in-depth migration and stable retention of EGPs in the pore-throats with an optimal matching coefficient(0.29),which was much better than that in cases with a smaller matching coefficient(0.17)or an excessive matching coefficient(0.39).Moreover,the NMR displacement experiments of 3-D heterogeneous cores were carried out to simulate the EGPs profile control in actual reservoir porous *** images and T2 spectrum curves of crude oil showed that EOR in the low-permeability layer was highest(56.1%)using EGPs profile control with an optimal matching coefficient,attributing to the in-depth migration and stable retention of EGPs.

关键词： Enhanced oil recovery Elastic gel particles Matching coefficient In-depth profile control Pore-throat visualization models

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Numerical analysis on heat transfer of laser diode module by equivalent electrical network method

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Optoelectronics Letters 2008年第3期4卷 180-183页

作者： YANG ming-wei ZHOU zhao-ying Department of Precision Instruments Tsinghua University Beijing 100084 China

Because it is complex and inconvenient to use the common temperature field calculating method and experiment method, for arialyzing heat transfer properties of laser diode module （LDM）, an equivalent electrical network method is presented in this paper. Simulation results show that the temperature stability is closely related to ambient temperature, heat sink, LDM current and TEC current. Ambient temperature and TEC controller are the dominant terms effecting on temperature control in practice,

关键词：数字分析技术热传递激光二极管电网

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Impact of flow rate on dynamic imbibition in fractured tight sandstone cores

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Petroleum Science 2022年第6期19卷 2895-2904页

作者： Yi-Fei Liu Cai-Li Dai Chen-wei Zou Qing You ming-wei zhao Guang zhao Yong-Peng Sun Shandong Key Laboratory of Oilfield Chemistry(China University of Petroleum(East China)) Qingdao266580ShandongChina Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao266580ShandongChina School of Energy Resources China University of GeosciencesBeijing100083China

Dynamic imbibition,which is significantly affected by flow rate,plays an important role in the development of tight *** study investigated the impact of flow rate on dynamic imbibition in fractured tight sandstone cores via online nuclear magnetic resonance core-flooding *** oil expulsion efficiency and capillary number of multiscale pores were quantitatively analyzed to elucidate the influence of flow rate on the oil recovery during dynamic *** pores of the cores used were divided into micropores(0.01-1.00 μm in diameter),mesopores(1.00-30.00 μm in diameter),and macropores(30.00-400.00 μm in diameter) by matching the T_(2)spectrum and the mercury intrusion *** volume proportion of micropores was 52.0%,and that of macropores was 19.0%.The total oil recovery of the core was found to reach 29.8% at the optimal flow rate of 0.1 mL/*** the optimal flow rate,the oil recovery of micropores reached 50.4%,followed by that of macropores(28.6%),and that of mesopores was the lowest(15.8%).The oil expulsion efficiency,the capillary number,and the contribution to total oil recovery of micropores significantly increased with the decrease in flow rate,while those of macropores *** was caused by the synergy of capillary force and displacement *** dynamic imbibition at a low flow rate,the oil in micropores was effectively expelled driven by capillary force,and the effect of displacement pressure was weak,leading to large amounts of remaining oil trapped in *** the contrary,when the flow rate was too high,large amounts of remaining oil would be trapped in *** at a moderate flow rate did the capillary force and displacement pressure both have significant effects on oil expulsion,and the oil in different sized pores was effectively expelled,thus generating a relatively high total oil recovery.

关键词： Tight oil Dynamic imbibition Flow rate Oil recovery Nuclear magnetic resonance

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A novel triple responsive smart fluid for tight oil fracturing-oil expulsion integration

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Petroleum Science 2023年第2期20卷 982-992页

作者： ming-wei Gao ming-Shan Zhang Heng-Yi Du ming-wei zhao Cai-Li Dai Qing You Shun Liu Zhe-Hui Jin Shandong Key Laboratory of Oilfield Chemistry(China University of Petroleum(East China)) Qingdao266580ShandongPR China Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao266580ShandongPR China Department of Civil and Environmental Engineering University of AlbertaEdmontonAlbertaT6G 1H9Canada Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil&Gas Reservoirs Engineering Research Center of Development and Management for Low to Ultra-low Permeability Oil&Gas Reservoirs in West China(Ministry of Education)Xi'an Shiyou UniversityXi'an710065ShaanxiPR China School of Energy Resources China University of GeosciencesBeijing100083PR China

The traditional multi-process to enhance tight oil recovery based on fracturing and huff-n-puff has obvious deficiencies,such as low recovery efficiency,rapid production decline,high cost,and complexity,***,a new technology,the so-called fracturing-oil expulsion integration,which does not need flowback after fracturing while making full use of the fracturing energy and gel breaking fluids,are needed to enable efficient exploitation of tight oil.A novel triple-responsive smart fluid based on“pseudo-Gemini”zwitterionic viscoelastic surfactant(VES)consisting of N-erucylamidopropyl-N,N-dimethyl-3-ammonio-2-hydroxy-1-propane-sulfonate(EHSB),N,N,N′,N′-tetramethyl-1,3-propanediamine(TMEDA)and sodium p-toluenesulfonate(NaPts),is ***,the rheology of smart fluid is systematically studied at varying conditions(CO_(2),temperature and pressure).Moreover,the mechanism of triple-response is discussed in ***,a series of fracturing and spontaneous imbibition performances are systematically *** smart fluid shows excellent CO_(2)-,thermal-,and pressure-triple responsive *** can meet the technical requirement of tight oil fracturing construction at 140°C in the presence of 3.5 MPa CO_(2).The gel breaking fluid shows excellent spontaneous imbibition oil expulsion(∼40%),salt resistance(1.2×104 mg/L Na+),temperature resistance(140°C)and aging stability(30 days).

关键词： Fracturing-oil expulsion integration Tight oil Triple responsive smart fluid "Pseudo-gemini"zwitterionic surfactant Fracturing fluid Spontaneous imbibition

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Quantitatively probing interactions between membrane with adaptable wettability and oil phase in oil/water separation

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Petroleum Science 2023年第4期20卷 2564-2574页

作者： Zhong-Zheng Xu ming-wei zhao Yi-Ning Wu Jia-wei Liu Ning Sun Zi-zhao Wang Yi-ming Zhang Lin Li Cai-Li Dai Shandong Key Laboratory of Oilfield Chemistry School of Petroleum EngineeringChina University of Petroleum(East China)QingdaoShandong266580China Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Ministry of EducationQingdaoShandong266580China

The membrane method based on adaptive wettability shows great advantages in oil-water *** present,researches focus on the excellent application performance of the membrane material,while the quantitative analysis of interactions in oil-water separation is rarely ***,we constructed an adaptable wettability membrane with multiple polymer networks by polydopamine(PDA)and mussel-inspired amphiphilic *** on the Owens three-probe liquid method,the surface energy of the modified membrane was verified to meet the adaptive wettability conditions,with surface energies(γ-8)of 147.6 mJ m^(−2)(superhydrophilic/underwater superoleophobic)and 49.87 mJ m^(−2)(superhydrophobic/superoleophobic),*** adhesion or repulsion of the membrane to the oil phase under different conditions during the separation process was quantified by the chemical probe AFM *** addition,the oil-water selective separation mechanism was further analyzed in a simplified membrane microchannel *** results show that the different wetting produces capillary additional pressure in opposite directions,resulting in different energies to be overcome when the oil or water passes through the microchannels,thus achieving selective separation.

关键词： Adaptable wettability Selective oil/water separation Interface interaction Probe AFM technique

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