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5713篇 您的检索式:作者名="Qiu J"
    题名 作者 年代 出处 被引量
1金厂沟梁-二道沟金矿田内花岗岩类侵入体锆石的离子探针U-Pb年代学及意义显示文摘金厂沟梁-二道沟金矿田内花岗岩类侵入体SHRIMP锆石U-Ph定年结果表明,该区中生代以来到少经历了三次中酸性岩浆侵入作用,它们分别以西台子二长花岗岩、娄上含辉石石英闪长岩和西对面沟花岗闪长岩及闪长玢岩脉在218±4Ma(印支期)、161±1Ma(燕山早期)和126±1Ma(燕山晚期)的侵位为标志。花岗岩类的地球化学资料表明,这些花岗岩类侵入体形成与造山作用有关,为造山后或陆内拉张作用的产物。二道沟矿区成矿前或成矿期闪长玢岩脉的年龄126±1Ma限定了该区金矿化的最大年龄;结合前人有关年代学资料,认为本区金矿化应发生在126~118Ma。这说明金厂沟梁-二道沟金矿田的金矿床与我国胶东、小秦岭和辽东等地区的金矿床是同时形成的,再次证明燕山晚期是中国最重要而广泛的金成矿期。此外,在这些主要的金矿区内,金矿化时间上均具有与各自区内最晚一次花岗质岩浆作用同时或稍晚的特征,这可能指示金矿床是造山作用或区域构造-岩浆演化最晚期的产物。苗来成 范蔚茗 翟明国 Qiu Y M McNaughton N J Groves D I 2003岩石学报2003,19,1:70
2On the tuning of electrical and thermal transport in thermoelectrics: an integrated theory–experiment perspective显示文摘During the last two decades,we have witnessed great progress in research on thermoelectrics.There are two primary focuses.One is the fundamental understanding of electrical and thermal transport,enabled by the interplay of theory and experiment;the other is the substantial enhancement of the performance of various thermoelectric materials,through synergistic optimisation of those intercorrelated transport parameters.Here we review some of the successful strategies for tuning electrical and thermal transport.For electrical transport,we start from the classical but still very active strategy of tuning band degeneracy(or band convergence),then discuss the engineering of carrier scattering,and finally address the concept of conduction channels and conductive networks that emerge in complex thermoelectric materials.For thermal transport,we summarise the approaches for studying thermal transport based on phonon–phonon interactions valid for conventional solids,as well as some quantitative efforts for nanostructures.We also discuss the thermal transport in complex materials with chemical-bond hierarchy,in which a portion of the atoms(or subunits)are weakly bonded to the rest of the structure,leading to an intrinsic manifestation of part-crystalline part-liquid state at elevated temperatures.In this review,we provide a summary of achievements made in recent studies of thermoelectric transport properties,and demonstrate how they have led to improvements in thermoelectric performance by the integration of modern theory and experiment,and point out some challenges and possible directions.Jiong Yang Lili Xi Wujie Qiu Lihua Wu Xun Shi Lidong Chen Jihui Yang Wenqing Zhang Ctirad Uher David J Singh 2016npj Computational Materials2016,,1:24
3The value of postoperative hepatic regional chemotherapy in prevention of recurrence after radical resection of primary liver cancer显示文摘INTRODUCTIONIn China,primary liver cancer (PLC) ranks secondin cancer mortality since the 1990s.In the field ofPLC treatment,surgical resection remains the best,which includes large PLC resection,small PLCresection,re-resection of subclinical recurrence,aswell as cytoreduction and sequential resection forunresectable PLC.However,recurrenceWu ZQ Fan J Qiu SJ Zhou J Tang ZY 2000World Journal of Gastroenterology2000,6,1:19
4Variation of summer monsoon intensity on the Loess Plateau of Central China during the last 130 000 a——Evidence from Rb and Sr distribution显示文摘THE loess-paleosol sequences from China potentially provide one of the best terrestrial records of past climates. Studies have shown that magnetic susceptibility in the sequences represents a proxy climate index closely related to changes of summer monsoon intensity. Some interpretative models have been advanced to account for these magnetic variations, although unanimity of opinion has not been reached. Recent geochemical studies of chemicalChen, J Qiu, G Lu, HY Ji, JF 1997Chinese Science Bulletin1997,42,6:4
5Diffusion-weighted 7.0T Magnetic Resonance Imaging in Assessment of Intervertebral Disc Degeneration in Rats显示文摘Long-Yang Li Xiao-Lin Wu Richard J Roman Fan Fan Chen-Sheng Qiu Bo-Hua Chen 2018Chinese Medical Journal2018,,1:3
6Novel oncogenes and tumor suppressor genes in hepatocellular carcinoma显示文摘Hepatocellular carcinoma(HCC)is a very deadly disease.HCC initiation and progression involve multiple genetic events,including the activation of proto-oncogenes and disruption of the function of specific tumor suppressor genes.Activation of oncogenes stimulates cell growth and survival,while loss-of-function mutations of tumor suppressor genes result in unrestrained cell growth.In this review,we summarize the new findings that identified novel proto-oncogenes and tumor suppressors in HCC over the past five years.These findings may inspire the development of novel therapeutic strategies to improve the outcome of HCC patients.Fang Wang Peter Breslin S J Wei Qiu 2021Liver Research2021,5,4:3
7Rapid activation of JNK and p38 by glucocorticoids in primary cultured hippocampal cells显示文摘Qi AQ Qiu J Xiao L Chen YZ 2005第二军医大学学报2005,26,10:3
8Laser-induced microjet-assisted ablation for high-quality microfabrication显示文摘Liquid-assisted laser ablation has the advantage of relieving thermal effects of common laser ablation processes, whereas the light scattering and shielding effects by laser-induced cavitation bubbles, suspended debris, and turbulent liquid flow generally deteriorate laser beam transmission stability, leading to low energy efficiency and poor surface quality. Here, we report that a continuous and directional high-speed microjet will form in the laser ablation zone if laser-induced primary cavitation bubbles asymmetrically collapse sequentially near the air-liquid interface under a critical thin liquid layer. The laser-induced microjet can instantaneously and directionally remove secondary bubbles and ablation debris around the laser ablation region, and thus a very stable material removal process can be obtained. The shadowgraphs of high-speed camera reveal that the average speed of laser-induced continuous microjet can be as high as 1.1 m sin its initial 500 μm displacement. The coupling effect of laser ablation, mechanical impact along with the collapse of cavitation bubbles and flushing of high-speed microjet helps achieve a high material removal rate and significantly improved surface quality. We name this uncovered liquid-assisted laser ablation process as laser-induced microjet-assisted ablation(LIMJAA) based on its unique characteristics. High-quality microgrooves with a large depth-to-width ratio of 5.2 are obtained by LIMJAA with a single-pass laser scanning process in our experiments. LIMJAA is capable of machining various types of difficult-to-process materials with high-quality arrays of micro-channels, square and circle microscale through-holes. The results and disclosed mechanisms in our work provide a deep understanding of the role of laser-induced microjet in improving the processing quality of liquid-assisted laser micromachining.Yang Guo Pei Qiu Shaolin Xu Gary J Cheng 2022International Journal of Extreme Manufacturing2022,4,3:3
9Analysis of SSRs Uncovers Hierarchical Structure and Genetic Diversity in Chinese Soybean Landraces显示文摘For clarifying the hierarchical patterns of population structure of soybean landraces in China, the seven clusters previously identified using Bayesian clustering of 1 504 soybean landraces based on SSR markers genotyping data were further analyzed. Using the largest value of ΔK, these landraces could be split into 20 sub-clusters, which was supported by highly significant pairwise Fst-values and generally in accordance with the geographic origin and sowing types. The autumn-sowing types ended up in one distinct sub-cluster from the otherwise summer-sowing type, where the autumn-sowing types are most likely derived from. The division into 20 sub-clusters explained 7.3% of the genetic variation, next to 9.7% present among the seven clusters, 81.1% residing among landraces within sub-clusters, and 1.9% within the landraces. The distribution pattern of genetic diversity among the sub-clusters of each cluster was uneven, with two HSuM sub-clusters (Central China) and some South China sub-clusters showing significantly higher level of genetic diversity.LI Ying-hui Marinus J M Smulders CHANG Ru-zhen QIU Li-juan 2010Agricultural Sciences in China2010,9,12:2
10Polychlorinated biphenyl congeners and organochlorine insecticides in the water column and sediments of Daya Bay, China 显示文摘Zhou J L Maskaoui K Qiu Y W 2001Environmental Pollution2001,113,:2
11Influence of Eutrophication on the Distribution of Total Mercury and Methylmercury in Hydroelectric Reservoirs显示文摘Meng Bo Feng X B Chen C X Qiu G L Sommar J Guo Y N Liang P Wan Q 2010EN2010,,5:2
12Durable Asphalt Pavements Are Self Healing显示文摘The traffic volume and the number of heavy vehicles are growing continuously. Considering the continuous traffic flow and the limited time available for road maintenance,it is very important to design a durable pavement system. Asphalt pavements with a healing capability are believed to be very useful since they can extend the pavement service life thanks to rest periods and hot summers. In order to design durable asphalt pavements,research in understanding and upgrading the self-healing capability of bituminous materials in time is of major importance. The self healing capability of bituminous mastic was evaluated in this research with a direct tension healing test. In the test program,different healing times,crack status and modifications were applied. The results indicate that elastic recovery and flow capacity are important factors for the self healing capability of bituminous materials at different crack phases as simulated with the direct tension test.QIU J VAN DE VEN M F C WU S P YU J Y MOLENAAR A A A 2010武汉理工大学学报2010,32,17:2
13Application of a Coupled Eulerian–Lagrangian approach on geomechanical problems involving large deformations显示文摘Gang Qiu Sascha Henke Jürgen Grabe 2010Computers and Geotechnics2010,,1:2
14An incremental analysis of spark paths in air using 3 dimensional image processing显示文摘Qiu D H MacAlpine J M K Li Z Y 2000IEEE Trans on Dielectrics and Electrical Insulation2000,7,6:1
15Geostatistical analysis of soil moisture variability on Da Nangou Catchment of Loess Plateau, China显示文摘WANG J FU B J QIU Y 2001Environmental Geology2001,41,:1
16Fas receptor and neuronal cell death after spinal cord ischemia显示文摘Matsushita K Wu Y Qiu J 2000J Neuro2000,20,18:1
17Enhanced high-potential and elevated-temperature cycling stability of LiMn2O4 cathode by TiO2 modification for Li-ion battery 显示文摘Yu L Qiu x xi J Zhu W T Chen L Q 2006Eleetrochimica Acta2006,51,:1
18Hydrogen bond effect of azido polyurethance elastomer by dynamic mechanical analysis显示文摘QIU S J GAN X GAO C 2006Journal of Polymer Science Part B : Polymer Physics2006,44,19:1
19Corporate Precautionary Cash Holdings 显示文摘HANS J QIU J P 2007Journal of Corporate Finance2007,13,2:1
20Ischemia preconditioning induces selective translocation of protein kinase C isoforms epsilon and eta in the heart of concious rabbits without subcellar redistribution of total protein kinase C activity显示文摘 Zhang J Qiu Y 1997Circ Res1997,81,3:1
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