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国际医学放射学杂志 2024年第4期 497-498页

作者： H.y.Jiang y.qin H.Wei T.y.Zheng T.yang y.A.Wu 程昊

摘要目的对比增强MRI可以为肝细胞肝癌（HCC）病人提供个体化的预后信息，研究旨在探讨MRI征象对早期无复发生存（≤2年，E-RFS）、晚期无复发生存（>2年，L-RFS）

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A multi-scale model for CO_(2) sequestration enhanced coalbed methane recovery

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Frontiers of Chemical Science and Engineering 2009年第1期3卷 20-25页

作者： G.X.WANG X.R.WEI V.RUDOLPH C.T.WEI y.qin School of Engineering University of QueenslandSt Lucia Qld 4072Australia School of Resources and Geoscience China University of Mining&TechnologyXuzhou 221008China

This paper presents a multi-scale model to simulate the multicomponent gas diffusion andﬂow in bulk coals for CO_(2) sequestration enhanced coalbed methane *** model is developed based on a bi-dispersed structure model by assuming that coal con-sists of microporous micro-particles,meso/macro-pores and open *** bi-disperse diffusion theory and the Maxwell-Stefan approach were incorporated in the model,providing an improved simulation of the CH4-CO_(2)/CH4-N2 counter diffusion *** the model,the counter diffusion process is numerically coupled with theﬂow of the mixture gases occurring within macro-pores or fractures in coal so as to account for the interaction between diffusion andﬂow in gas transport through *** model was validated by both experimental data from literature and our CO_(2)ﬂush tests,and shows an excellent agreement with the *** results reveal that the gas diffusivities,in particular the micro-pore diffusivities are strongly concentration-dependent.

关键词： multi-scale model gas transport coal coalbed methane CO_(2)sequestration

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液晶聚合物与常规聚合物的共混纤维

国际纺织导报 1997年第4期25卷 10-11页

作者： y.qin 裴玉新 Innovative公司

液晶聚合物(LCP_s)是一种由刚性棒状分子链组成的新材料.由于其独一无二的分子及超分子结构LCP_s能形成高度取向结构.生产化学纤维时,通常初生纤维分子取向度差,因而需要冷拉伸过程以提高纤维的强度/模量.对于LCP_s而言,由于初生纤维的... 详细信息

液晶聚合物(LCP_s)是一种由刚性棒状分子链组成的新材料.由于其独一无二的分子及超分子结构LCP_s能形成高度取向结构.生产化学纤维时,通常初生纤维分子取向度差,因而需要冷拉伸过程以提高纤维的强度/模量.对于LCP_s而言,由于初生纤维的分子链已经具备高的取向度,有较高的强度/模量,故不需要拉伸.＿

关键词：液晶聚合物聚合物共混初生纤维共混纤维纤维的强度原纤维分子及超分子结构共混体分子取向度螺杆套

Feasibility and Safety of Stenting for Symptomatic Carotid Arterial Dissection

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Feasibility and Safety of Stenting for Symptomatic Carotid A...

Endoscopic submucosal dissection with needle-knife for treatment of small rectal carcinoid tumors

第七届国际脑血管病高峰论坛

作者： y.qin y.Li X.Fan M.Ma G.Xu X.Liu W.Zhu Department of Neurology,Jinling Hospital,Nanjing University School of Medicine,Nanjing,China

Objective:To determine the procedural feasibility and safety of carotid angioplasty and stent placement of carotid artery dissection(CAD)patients who had failed antithrombotic therapy in acute ***:A series of 33 consecutive patients(mean age,40.21 years;29 men and 4 women)who underwent angioplasty and stent placement for symptomatic carotid artery dissection(sCAD)from May 2005 to December 2010 in the Nanjing Stroke Registry Program(NSRP)was retrospectively *** the included patients had been diagnosed definitively based on catheter angiography,and had failed to respond to medical therapy during the course of initial hospital *** baseline and followed up data of these patients were collected and ***:Of all the 33 included patients, 32 patients had achieved technical success without any intraoperative *** patients manifested ipsilateral Horner sign on the next day after stenting,and one of them suffered from recurrence of transient ischaemic attack (TIA)during the course of follow up,but completely remission via antithrombotic ***:Endovascular stenting is a feasible and safe therapeutic strategy of CAD patients who have failed medical therapy.

关键词： Carotid artery dissection Stent Stroke Transient ischaemic attack

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Endoscopic submucosal dissection with needle-knife for treat...

Roles of Upper-Level Descending Inflow in Moat Development in Simulated Tropical Cyclones with Secondary Eyewall Formation

第十七届中国内镜医师大会

作者： P.-H. Zhou L.-Q.yao y.-S.Zhong M.-D. Xu W.-F.Chen X.-y.qin (Department of General Surgery,Zhongshan Hospital,Fudan University,Shanghai 200032,P.R.China)

＜正＞【Objective】Endoscopic submucosal dissection（ESD）is a new widely accepted method for the treatment of early gastric cancer,which was developed in order to increase the en bloc rate. The objective of our study was to evaluate the efficacy and safety of ESD for small rectal carcinoid tu- mors.【Methods】From January 2006 to March 2007,patients diagnosed as small rectal carcinoid tu- mors with endoscopic ultrasonography（ESD）were treated using ESD with *** lesion was directly resected with needle-knife after solutions were injected into the submucosal layer be- neath the *** rate of curative en bloc resection,the procedure time,and the incidence of com- plications were investigated.【Results】15 patients with 15 small rectal carcinoid tumors were treated by *** mean diameter of lesions was 8.3 mm（range 3-10）.The rate of en bloc resection was 100%（15/15）,the rate of complete resection was 100%（15/15）.The mean time required for ESD procedure was 45 min（range 15-125）.None of patients had massive hemorrhage during ESD and had delayed bleeding after *** occurred in 1 case and the patient recovered after several days’ conservative *** perforation rate was 6.67%（1/15）.All 15 cases were followed up with confirmed healing of the artificial ulcer with no lesion residue or recurrence.【Conclusions】ESD is a feasible method for the treatment of small rectal carcinoid tumor,and has a big advantage with regard to achieving en bloc *** treatment modality also demonstrates an acceptable rate of complications that can be adequately managed endoscopically.

关键词： ESD Small rectal carcinoid tumor endoscopy

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Advances in Atmospheric Sciences 2024年第6期41卷 1100-1114页

作者： Nannan qin Liguang WU Nanjing Joint Institute for Atmospheric Sciences Nanjing 210041China Shanghai Typhoon Institute China Meteorological AdministrationShanghai 200030China Department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences Fudan UniversityShanghai 200438China Innovation Center of Ocean and Atmosphere System Zhuhai Fudan Innovation Research InstituteZhuhai 518057China

This study investigated the effects of upper-level descending inflow(ULDI)associated with inner-eyewall convection on the formation of the moat in tropical cyclones(TCs)with secondary eyewall formation(SEF).In our numerical experiments,a clear moat with SEF occurred in TCs with a significant ULDI,while no SEF occurred in TCs without a significant *** eyewall convection developed more vigorously in the control run.A ULDI occurred outside the inner-eyewall convection,where it was symmetrically *** ULDI was initially triggered by the diabatic warming released by the inner eyewall and later enhanced by the cooling below the anvil *** ULDI penetrated the outer edge of the inner eyewall with relatively dry air and prevented excessive solid-phase hydrometeors from being advected further *** produced extensive sublimation cooling of falling hydrometeors between the eyewall and the outer *** sublimation cooling resulted in negative buoyancy and further induced strong subsidence between the eyewall and the outer *** a result,a clear moat was *** of the moat in the ongoing SEF prevented the outer rainband from moving farther inward,helping the outer rainband to symmetrize into an outer *** the sensitivity experiment,no significant ULDI formed since the eyewall convection was weaker,and the eyewall anvil developed relatively lower,meaning the formation of a moat and thus an outer eyewall was less *** study suggests that a better-represented simulation of inner-eyewall convective structures and distribution of the solid-phase hydrometeors is important to the prediction of SEF.

关键词： tropical cyclone secondary eyewall formation upper-level descending inflow eyewall convection

Design and performance investigation of modified dual reflector parabolic trough collector with double planar mirrors

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Science China(Technological Sciences) 2024年第3期67卷 902-918页

作者： LI Peijing LIU TaiXiu qin yuanLong LI JiChao LIU QiBin School of Energy Powerand Mechanical EngineeringNorth China Electric Power University Beijing 226China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei 230027China

In a typical parabolic trough collector(PTC), sunlight is concentrated at the bottom of the absorber tube. This concentrated solar flux leads to uneven heat distribution, resulting in high local temperatures and significant thermal stress on the absorber *** limitations have restricted the application of PTCs in solar thermochemistry and other fields and have impacted their safe operation. In this study, a new PTC with dual planar mirrors(DPMS) is proposed to homogenize the circumferential solar flux distribution of the absorber tube. A design method and single-objective optimization of the new PTC with a DPMS are proposed,and an uncertainty analysis of the operational and structural parameters is performed. A coupled light-heat-structure numerical model was developed to study the heat transfer performance and structural mechanical properties. The thermodynamic properties of the PTC with DPMS under different boundary conditions were analyzed. The results show that the circumferential temperature difference of the new PTC is within 2.6 K, and the circumferential thermal deformation is within 0.9 mm under typical working conditions(the inlet velocity of the heat transfer fluid is 3 m/s, inlet temperature is 573.15 K, and the direct normal irradiance is 1000 W/m^(2)). Compared with conventional PTCs, the circumferential temperature difference is reduced by 74%–90%, and the maximum thermal deformation along the y-axis is reduced by more than 95% under all working conditions(1–5 m/s, 373.5–675.15 K, 200–1000 W/m^(2)). The new PTC maintains the uniformity of the circumferential solar flux distribution for different operating parameters(sun incident angle of 0°–3°) and installation errors(±3 mm), is suitable for solar energy applications in various fields, and has the potential for large-scale applications.

关键词： solar thermal energy parabolic trough collector secondary reflector solar flux distribution optical optimization

Dynamic ocean inverse modeling based on differentiable rendering

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Computational Visual Media 2024年第2期10卷 279-294页

作者： Xueguang Xie yang Gao Fei Hou Aimin Hao Hong qin State Key Lab of Virtual Reality Technology and Systems Beihang UniversityBeijing 100191China qingdao Research Institute Beihang UniversityQingdao 266100Chinaand Peng Cheng LabShenzhen 518000China SKLCS Institute of SoftwareChinese Academy of SciencesBeijing 100190Chinaand University of Chinese Academy of SciencesBeijing 100049China Department of Computer Science Stony Brook University(SUNY at Stony Brook)Stony BrookNew York 11794-2424USA

Learning and inferring underlying motion patterns of captured 2D scenes and then re-creating dynamic evolution consistent with the real-world natural phenomena have high appeal for graphics and *** bridge the technical gap between virtual and real environments,we focus on the inverse modeling and reconstruction of visually consistent and property-verifiable oceans,taking advantage of deep learning and differentiable physics to learn geometry and constitute waves in a self-supervised ***,we infer hierarchical geometry using two networks,which are optimized via the differentiable *** extract wave components from the sequence of inferred geometry through a network equipped with a differentiable ocean ***,ocean dynamics can be evolved using the reconstructed wave *** extensive experiments,we verify that our new method yields satisfactory results for both geometry reconstruction and wave ***,the new framework has the inverse modeling potential to facilitate a host of graphics applications,such as the rapid production of physically accurate scene animation and editing guided by real ocean scenes.

关键词： inverse modeling surface reconstruction wave modeling ocean waves differentiable rendering(DR)

Enhanced antibacterial activity,corrosion resistance and endothelialization potential of Ti-5Cu alloy by oxygen and nitrogen plasma-based surface modification

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Journal of Materials Science & Technology 2024年第1期168卷 250-264页

作者： Xiaotong Zhao Jiali Hu Jingjun Nie Dafu Chen Gaowu qin Erlin Zhang Key Lab.for Anisotropy and Texture of Materials Education Ministry of ChinaSchool of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Research Center for Metallic Wires Northeastern UniversityShenyang 110819China Laboratory of Bone Tissue Engineering Beijing Laboratory of Biomedical MaterialsNational Center for OrthopaedicsBeijing Research Institute of Traumatology and OrthopaedicsBeijing Jishuitan HospitalBeijing 100035China

Antibacterial Ti-5Cu alloy is a promising substitute material for Ti-made cardiovascular implants,so its surface engineering is crucial to expediting clinical *** the antibacterial and cardiovas-cular biological benefits of Cu^(2+)and titanium-nitride-oxide(TiN x O y)coatings,a Cu_(2)O/CuO-TiN x O y coating with upregulated Cu^(2+)release was successfully deposited on Ti-5Cu alloy for the first time using oxygen and nitrogen plasma-based surface *** superhydrophilic and nanostructured Cu_(2)O/CuO-TiN x O y coating had a dense structure and was well bonded to the substrate,resulting in enhanced cor-rosion resistance,while CuO/Cu_(2)O in the coating released Cu^(2+)faster than Ti_(2)Cu phase in the *** gratifying,the coating demonstrated perfect antibacterial properties(R>99.9%against ***),owing primarily to direct contact sterilization of Cu_(2)O/*** most encouraging phenomenon was that the coating dramatically accelerated HUVEC adhesion(1.4 times),proliferation(RGR:106%-116%),and particularly migration(RMR:158%-247%)compared with the control *** coating extract also signifi-cantly stimulated in vitro angiogenesis *** rapid endothelialization for Cu_(2)O/CuO-TiN x O y coating was attributed to the surface nanostructure and Cu^(2+)/NO_(2)−release,which upregulated the angiogenesis-related gene expression of HIF-1α,VEGF,and eNOS to increase VEGF secretion and NO *** of the findings indicated that the Cu_(2)O/CuO-TiN x O y coating could enhance the corrosion resistance,an-tibacterial properties,and endothelialization potential of Ti-Cu alloy,displaying great clinical potential in cardiovascular applications.

关键词： Titanium-copper alloy Titanium-nitride-oxide(TiNxOy) Cu^(2+)release Antibacterial property Cell compatibility

Thermal runaway evolution of a 280 Ah lithium-ion battery with LiFePO_(4) as the cathode for different heat transfer modes constructed by mechanical abuse

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Journal of Energy Chemistry 2024年第6期93卷 32-45,I0002页

作者： Zhixiang Cheng Chengdong Wang Wenxin Mei Peng qin Junyuan Li qingsong Wang State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026AnhuiChina

Lithium iron phosphate batteries have been increasingly utilized in recent years because their higher safety performance can improve the increasing trend of recurring thermal runaway ***,the safety performance and mechanism of high-capacity lithium iron phosphate batteries under internal short-circuit challenges remain to be *** work analyzes the thermal runaway evolution of high-capacity LiFePO_(4) batteries under different internal heat transfer modes,which are controlled by different penetration *** penetration cases involving complete penetration and incomplete penetration were detected during the test,and two modes were performed incorporating nails that either remained or were removed after penetration to comprehensively reveal the thermal runaway mechanism.A theoretical model of microcircuits and internal heat conduction is also *** results indicated three thermal runaway evolution processes for high-capacity batteries,which corresponded to the experimental results of thermal equilibrium,single thermal runaway,and two thermal runaway *** difference in heat distribution in the three phenomena is determined based on the microstructure and material structure near the *** controlling the heat dissipation conditions,the time interval between two thermal runaway events can be delayed from 558 to 1417 s,accompanied by a decrease in the concentration of in-situ gas production during the second thermal runaway event.

关键词： Lithium-ion battery safety Micro short-circuit cell Heat transfer modes Internal short circuit Nail-penetration test