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66篇 您的检索式:作者名="Li Mingyi"
    题名 作者 年代 出处 被引量
1Paleoecology of Early Ordovician Reefs in the Yichang Area,Hubei:a Correlation of Organic Reefs Between Early Ordovician and Jurassic显示文摘The Early Ordovician System is composed mainly of a series of carbonate platform deposits interbedded with shale and is especially characterized by a large number of organic reefs or buildups that occur widely in the research area.The reefs have different thicknesses ranging from 0.5 m to 11.5 m and lengths varying from 1 m to 130 m.The reef-building organisms include Archaeoscyphia, Recepthaculitids,Batostoma,Cyanobacteria and Pulchrilamina.Through the research of characteristics of the reef-bearing str...Chuantao XIAO Meng LI Wei YANG Mingyi HU Chao LI 2011Acta Geologica Sinica(English Edition)2011,85,5:7
2Injectable conductive gelatin methacrylate/oxidized dextran hydrogel encapsulating umbilical cord mesenchymal stem cells for myocardial infarction treatment显示文摘Umbilical cord mesenchymal stem cells(UCMSCs)transplantation has been proposed as a promising treatment modality for myocardial infarction(MI),but the low retention rate remains a considerable challenge.Injectable natural polymer hydrogels with conductivity ability are highly desirable as cell delivery vehicles to repair infarct myocardium and restore the cardiac function.In this work,we developed a hydrogel system based on gelatin methacrylate(GelMA)and oxidized dextran(ODEX)as cell delivery vehicles for MI.And dopamine could be used as a reductant of graphene oxide(GO)to form reductive GO(rGO).By adjusting the amount of rGO,the conductivity of hydrogels with 0.5 mg/mL rGO concentration(≈10^(-4)S/cm)was similar to that of natural heart tissue.In vitro cell experiments showed that the prepared hydrogels had excellent biocompatibility and cell delivery ability of UCMSCs.More importantly,GelMA-O5/rGO hydrogel could promote UCMSCs growth and proliferation,improve the myocardial differentiation ability of UCMSCs,and up-regulate the expression of cTnI and Cx43.Further in vivo experiments demonstrated that GelMA-O5/rGO/UCMSCs Hydrogel could significantly improve the ejection fraction(EF)of rats and significantly reduce myocardial infarct area compared to PBS group,promote the survival of UCMSCs,enhance the expression level of cTnI and Cx43,and decrease the expression level of caspase-3.The findings of this study suggested that the injectable conductive GelMA-O5/rGO hydrogel encapsulating UCMSCs could improve damaged myocardial tissue and reconstruct myocardial function,which will be a promising therapeutic strategy for cardiac repair.Shuoji Zhu Changjiang Yu Nanbo Liu Mingyi Zhao Zerui Chen Jian Liu Ge Li Huanlei Huang Huiming Guo Tucheng Sun Jimei Chen Jian Zhuang Ping Zhu 2022Bioactive Materials2022,7,7:4
3Mesozoic–Cenozoic Tectonic Evolution and Uplift in Pamir:Application of Fission Track Thermochronology显示文摘The Pamir Plateau can be divided into three secondary tectonic units from north to south:the North,the Middle and the South Pamir Blocks.The North Pamir Block belonged to the southern margin of Tarim-Karakum,thermochronological study of the Pamir structural intersection indicates that accretion of the Middle Pamir Block to the Eurasian Continental Margin and its subduction and collision with the North Pamir Block occurred in the Middle–Late Jurassic.Due to the Neo-Tethys closure in the Early Cretaceous,the South Pamir Block began to collide with the accretion(the Middle Pamir Block)of the Eurasian Continental Margin.Affected by the collision and continuous convergence between the Indian Plate and the Eurasian Plate since the Cenozoic,Pamir is in a multi-stage differential uplift process.During 56.1–48.5 Ma,North Pamir took the lead in uplifting,that is,the first rapid uplift in the Pamir region began there.The continuous compression and contraction of the Indian and Eurasian plates during 22.0–15.1 Ma forced the Pamir tectonic syntaxis to begin its overall uplift,i.e.Pamir began to enter the second rapid uplift stage in the Early Oligocene,which lasted until the Middle Miocene.During 14.6–8.5Ma,South Pamir was in a rapid uplift stage,while North Pamir was in a relatively stable state,showing asymmetry of tectonic deformation in the Pamir region in space.Since 6.5 Ma,Pamir began to rapidly uplift again.FAN Baocheng LIU Mingyi HE Zixin MENG Guanglu WU Huanhuan LI Lu 2021Acta Geologica Sinica(English Edition)2021,95,3:3
4Laboratory test on the combined cooling effect of L-shaped thermosyphons and thermal insulation on high-grade roadway construction in permafrost regions显示文摘With the completion of the Qinghai-Tibetan Railway,economic development of related areas has been greatly accelerated.This,in return,calls for building or upgrading more roadways,especially high-grade roadways.In cold regions,the thawing of permafrost can induce settlement damage of and even failure to railway (or roadway) embankments.Thermosyphons (self-powered refrigera-tion devices that are used to help keep the permafrost cool) have proved effective in mitigating thaw settlement by maintaining the thermal stability of the embankments.However,for high-grade roadway embankments of great width,stabilizing or cooling ef-fects of traditional geotechnological measures may be limited.To enhance the cooling effect of thermosyphons,an L-shaped thermosyphon was designed.A laboratory test was carried out to study the combined cooling effect of the L-shaped thermosyphon and thermal insulation applying to roadbed construction.The angle between the evaporator and condenser sections of the L-shaped thermosyphon is 134 degrees,and the L-shaped thermosyphon was inserted into the soil at an angle of 5 degrees with the road surface.The tested results show that the L-shaped thermosyphon is effective in removing heat from a roadway in winter.When the ambient air temperature is lower than the soil temperature,the thermosyphon is active and extracts the heat in the soil around it.When the ambient air temperature is higher than the soil temperature,the thermosyphon is inactive,and no heat is in-jected into the soil through the L-shaped thermosyphon.Compared to embankments with straight thermosyphons,the inner parts of the embankments with L-shaped thermosyphons were significantly cooled.It is hoped that the present study would be useful to the application of L-shaped thermosyphons in the construction of high-grade roadways in cold regions.YuanHong Dong,YuanMing Lai,MingYi Zhang,ShuangYang Li State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou,Gansu 730000,China. 2009Research in Cold and Arid Regions2009,1,4:3
5Overview of Thrust Ripple Suppression Technique fbr Linear Motors显示文摘Direct-drive actuators,linear motors are widely used in many industrial and military applications,particularly in high-end manufacturing due to advantages of high force density,rapid dynamic response,and low thermal losses.Permanent magnet linear synchronous motors(PMLSMs)can dramatically improve the dynamic and static performance of the motion system.However,as one of the most critical sources of error,the thrust ripple of linear motors can deteriorate performance and even excite the mechanical resonance.Thrust ripple suppression technology had received broad interest and has been researched extensively.Therefore,this paper summarizes different types of thrust ripple suppression methods and their principles are analyzed in detail.Firstly,structural optimization methods are introduced to suppress the thrust ripple and increase the precision of the thrust.Secondly,control methods are described to decrease the velocity fluctuation caused by the thrust ripple.Thirdly,a combination of structural design and control method is presented to compensate the ripple,meaning high order harmonic components are eliminated by permanent magnets(PM)skewing technology and low order harmonic are compensated by a linearization observer.Finally,conclusions are made regarding thrust ripple suppression technology and the future trend is proposed.Mingyi Wang Liyi Li Rui Yang 2016Chinese Journal of Electrical Engineering2016,2,1:2
6Passively Q-switched erbium doped fiber laser using a gold nanostars based saturable absorber显示文摘In this paper, we propose and demonstrate an all-fiber passively Q-switched erbium doped fiber laser(EDFL) by using gold nanostars(GNSs) as a saturable absorber(SA) for the first time, to the best of our knowledge. In comparison with other gold nanomorphologies, GNSs have multiple localized surface plasmon resonances, which means that they can be used to construct wideband ultrafast pulse lasers. By inserting the GNS SA into an EDFL cavity pumped by a 980 nm laser diode, a stable passively Q-switched laser at 1564.5 nm was achieved for a threshold pump power of 40 mW. By gradually increasing the pump power from 40 to 120 mW, the pulse duration decreases from 12.8 to 5.3 μs and the repetition rate increases from 10 to 17 kHz. Our results indicate that the GNSs are a promising SA for constructing pulse lasers.ZHE KANG MINGYI LIU ZHENWEI LI SIQING LI ZHIXU JIA CHENGZHI LIU WEIPING QIN GUANSHI QIN 2018Photonics Research2018,6,6:2
7Effects of hot pressing on electric performances of Bi_(0.5)Sb_(1.5)Te_3显示文摘The effects of hot pressing on electric performance and mechanical strength of Bi0.5Sb1.5Te3 thermoelectric material prepared through vacuum melting and milling were studied. The phase constituent and microstructure were analyzed by X-ray Diffraction and cold field emission Scanning Electric Microscope. Aeolotropisms of the material on microstructure and electric performances are approved. With the rise of hot pressing temperature (from 300-500 ℃) and pressure (30-70 MPa), electric conductivity and power factor are improved. Moreover, Bi0.5Sb1.5Te3 material can gain ideal thermoelectric performances and increased mechanical strength by hot pressing.XIAO Bo CHEN Hui WU Borong ZHU Lei LIU Mingyi JIAN Xuyu LI Lin 2006Rare Metals2006,25,z1:2
8Numerical study on the influence of geometrical parameters on natural convection cooling effect of the crushed-rock revetment显示文摘The crushed-rock revetment, considered as a highly porous medium, is often applied to embankment slope to protect the underlying permafrost and ensure the thermal stability of roadway in permafrost regions. In this paper, in order to increase and optimize the cooling capacity of crushed-rock revetment in cold regions roadway engineering, based on the thermal convection theories, the practical geometry and the temperature characteristics of in-situ crushed-rock revetment, convective pattern and cooling effect of crushed-rock revetment are numerically studied, with a thickness of 1.0 m under different geometrical parameters, e.g. sloped angle and aspect ratio. The results indicate that, with a thickness of 1.0 m and a temperature difference of 10.0 ℃ between top and bottom boundaries, due to the existence of natural convection, the effective thermal conductivity of crushed-rock revetment can be increased and the thermal 'semi-conductor' characteristics are endowed. However, the convective pattern changes with the variation of the sloped angle, namely, with the increase of the sloped angle, the convection cell number decreases; furthermore, when the flow changes from various cells to a single cell at a sloped angle, the Nu number is the smallest and the cooling effect is the worst, therefore, the corresponding sloped angle is considered as the worst cooling sloped angle. Besides, with the increase of the aspect ratio, the worst cooling sloped angle increases and tends to 32°, also approaching to the in-situ crushed-rock revetment angle 33.7°. Therefore, when the crushed-rock revetment em-bankment is too high, that is to say, the aspect ratio of the sloped crushed-rock revetment is too large, some measures should be taken to enhance its cooling effect, which have been researched and discussed in this paper. It is hoped that some scientific references can be supplied to the design and maintenance of the crushed-rock revetment embankment in cold regions.ZHANG MingYi CHENG GuoDong LI ShuangYang 2009Science China(Technological Sciences)2009,52,2:2
9Structure and effect of sulfated fucose branches on anticoagulant activity of the fucosylated chondroitin sulfate from sea cucumber Thelenata ananas显示文摘Mingyi Wu Rong Huang Dandan Wen Na Gao Jiangbo He Zi Li Jinhua Zhao 2011Carbohydrate Polymers2011,,1:2
10Resveratrol inhibits proliferation in human colorectal carcinoma cellsby inducing G1/S?phase cell cycle arrest and apoptosis through caspase/cyclin?CDKpathways显示文摘Bin Liu Zhongyou Zhou Wei Zhou Jie Liu Qingyu Zhang Juan Xia Juntao Liu Nianping Chen Mingyi Li Runzhi Zhu 2014Molecular Medicine Reports2014,,4:2
11Physical simulation of fluid flow and production performance in extra-low permeability porous media显示文摘For extra-low permeability reservoirs,with a permeability of about 0.3×10-3 μm2,fluid flow and production performance in cores were studied.A long core holder with a multi-location piezometric measurement was specially designed.An artificial long core,about 700 mm long and with a cross section of 45mm×45mm,was used.In the experiment,pressure distribution along the core can be measured in real time.Single phase flow in the core was investigated.Different modes of production in long cores were also simulated including natural depletion,water flooding,and advanced water flooding.Through physical simulation,flow parameters were collected and production characteristics in extra-low permeability cores were studied.From experimental results,it can be seen that fluid flow in extra-low permeability cores is different from that in high permeability cores.Transmission of pressure in extra-low permeability cores is very slow,and it needs a long time for the pressure to become stable.The distribution curve of pressure along the core is nonlinear and the production rate in extra-low permeability reservoirs decreases sharply.The development effects of different production modes in extra-low permeability cores were compared with one another.Among the production modes,advanced water flooding has much potential for effective development of extra-low permeability reservoirs.Natural depletion and conventional water flooding can also be used in early production periods.In addition,the countermeasures and some ideas especially for the potential development of extra-low permeability reservoirs are suggested.You Yuan Yue Xiang’an Li Mingyi Zhao Chunpeng Zhang Tao 2009Petroleum Science2009,6,4:2
12Organ-specific efficacy in advanced non-small cell lung cancer patients treated with first-line single-agent immune checkpoint inhibitors显示文摘Background:Response to immune checkpoint inhibitors(ICIs)is affected by multiple factors.This study aimed to explore whether sites of metastasis are associated with clinical outcomes of ICIs in advanced non-small-cell lung cancer(NSCLC)patients.Methods::The data of NSCLC patients with high programmed death-ligand 1 expression and good performance status receiving first-line ICIs monotherapy from Guangdong Provincial People’s Hospital between May 2019 and July 2020 were retrospectively analyzed.Metastatic sites included liver,bone,brain,adrenal gland,pleura,and contralateral lung.Progression-free survival(PFS)and overall survival(OS)were compared between different metastatic sites and metastatic burden by the Kaplan-Meier method.Organ-specific disease control rate(OSDCR)of different individual metastatic sites was evaluated.Results:Forty NSCLC patients meeting the criteria were identified.The presence of liver metastasis was significantly associated with shorter PFS(3.1 vs.15.5 months,P=0.0005)and OS(11.1 months vs.not reached,P=0.0016).Besides,patients with bone metastasis tend to get shorter PFS(4.2 vs.15.5 months,P=0.0532)rather than OS(P=0.6086).Moreover,the application of local treatment could numerically prolong PFS in patients with brain metastasis(15.5 vs.4.3 months,P=0.1894).More metastatic organs involved were associated with inferior PFS(P=0.0052)but not OS(P=0.0791).The presence of liver metastasis or bone metastasis was associated with more metastatic organs(Phi[φ]:0.516,P=0.001).The highest OSDCR was observed in lung(15/17),and the lowest in the liver(1/4).Conclusions:Metastases in different anatomical locations may be associated with different clinical outcomes and local tumor response to ICIs in NSCLC.ICIs monotherapy shows limited efficacy in patients with liver and bone metastasis,thus patients with this type of metastasis might require more aggressive combination strategies.Jiayi Deng Ming Gao Qing Gou Chongrui Xu Honghong Yan Mingyi Yang Jiakang Li Xiaorong Yang Xuewu Wei Qing Zhou 2022Chinese Medical Journal2022,,12:2
13Seasonal and Spatial Variations of Macro Benthos in the Intertidal Mudflat of Southern Yellow River Delta,China in 2007/2008显示文摘In order to examine the seasonal and spatial distributions of benthic animals in the intertidal mudflat of the southern Yellow River Delta,field investigations were carried out in 2007 and 2008 and multiple methods were applied.Results showed that,the biomass of macro benthos ranged at 0.75-1151.00 g wet m^(-2) and averaged at 156.31 g wet m^(-2),in which Mactra veneriformis accounted for 75.6%-93.4% of the total macro benthic biomass.More than 90% of macro benthos inhabited in the middle and low tide lines,and higher biomass occurred in early summer and lower in winter.Statistical analysis showed that:1)M.veneriformis growth was primarily favored at higher temperature and lower salinity;2)after long time interaction,benthic bivalve grazers led to patching distributions of Chlorophyll a(Chl a);3)macro benthic biomass positively related with Chl a when the concentration of Chl a was low,but they were negatively related when Chl a concentration was high;and 4)furthermore,the biomass of benthic bivalves peaked in the sediment with median grain size about 0.55 mm,but decreased gradually in coarse or fine sediments.The secondary productivity ranged at 0.37-283.68 g m^(-2)yr^(-1) and averaged at 47.88 g m^(-2) yr^(-1),in which 69.7% was contributed by M.veneriformis It was estimated that primary production was transformed to secondary production at a rate of 6.87%approximately,which implies that there is a local sustainability of high bivalve production.ZOU Li YAO Xiao YAMAGUCHI Hitomi GUO Xinyu GAO Huiwang WANG Kai SUN Mingyi 2018Journal of Ocean University of China2018,17,2:2
14Therapeutic revolution for inoperable stage III non-small cell lung cancer in the immune era显示文摘The PACIFIC study ushered in a“tsunami-like”therapeutic revolution for stage III inoperable non-small cell lung cancer(NSCLC)In the past,chemoradiotherapy(CRT)has been the standard of care for inoperable stage III NSCLC.Concurrent chemoradiotherapy(cCRT),if tolerable in patients,is the optimal treatment regimen.A meta-analysis has shown that cCRT results in a 5-year survival rate 4.5%longer than that with sequential chemoradiotherapy(sCRT)1.However,within 2 years after cCRT,approximately 30%of patients experience local recurrence,and approximately 40%develop distant metastasis2.Clinicians have explored induction chemotherapy3,consolidation chemotherapy4,and combination use with targeted drugs2,and found that none improve the prognosis.Jiakang Li Jingyan Xu Mingyi Yang Qing Zhou 2022Cancer Biology & Medicine2022,19,5:2
15Novel carbon nanohybrids as highly efficient magnetic resonance imaging contrast agents显示文摘新奇的碳 nanohybrids 成功地用作一个新磁性的回声成像 MRI 对比代理人基于未修改的 metallofullerenes 被制作了。nanohybrids 显示出更高的 R < 潜水艇 class= “ a-plus-plus ” > 1 relaxivity 和更好的使 Gd@C 明亮效果比 < 潜水艇 class= “ a-plus-plus ” > 82 哦 < 潜水艇 class= “ a-plus-plus ” > 在 T 的 X ,< 潜水艇 class= “ a-plus-plus ” > 在 vivo 的 1 幅 -weighted 先生图象。这是从原来的 gadofullerenes 的质子 relaxivity 的结果,它保留了完美的碳笼子结构可能完全那么避免 Gd 的版本 < 啜 class= “ a-plus-plus ” >3+ 个 离子。第二等的纺纱电子转移松驰机制被建议解释怎么 encaged Gd < 啜 class= “ a-plus-plus ” > 碳 nanohybrids 的 3+ 个 离子与包围的水分子交往。这条途径为开发高度有效、低的毒性 MRI 对比代理人打开新机会。Rongli Cui Juan Li Huan Huang Mingyi Zhang Xihong Guo Yanan Chang Min Li Jinquan Dong Baoyun Sun Gengmei Xing 2015Nano Research2015,8,4:2
16Does Mandatory IFRS Adoption Affect Crash Risk? 显示文摘DeFond Mark L Hung Mingyi Li Siqi 2015Accounting Review2015,,1:1
17Soil Nu-trient and soil enzyme activity of the slopes with differ-ent ecological protection Technologies显示文摘Zhao Zichao Xia Zhenyano Li Mingyi 2012Advanced Ma-terials Research2012,356,:1
18The impact of mandatory IFRS adoption on foreign mutual fund ownership: The role of comparability显示文摘Mark DeFond Xuesong Hu Mingyi Hung Siqi Li 2011Journal of Accounting and Economics2011,,3:1
19Microstructure evolution of SiC _ w/AZ91 magnesium matrix composite during high temperature compression 显示文摘Li Shubo Gan Weimin Zheng Mingyi 2005Transactions of Nonferrous Metals Society of China2005,15,2:1
20Minimum ground pre-freezing time before excavation of Guangzhou subway tunnel显示文摘Shuangyang Li Yuanming Lai Mingyi Zhang 2006Cold Regions Science and Technology2006,46,:1
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