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| 1 | AMS dating on glacial tills at the source area of the Urumqi River in the Tianshan Mountains and its implications显示文摘Using accelerating mass spectrometry (AMS) dating method, a dating has been made on the primary calcium carbonate in tills and secondary calcium carbonate coating on till gravel and the roche moutonnee formed since the Last Glaciation at the source area of the Urumqi River valley in the Tianshan Mountains, northwestern China. The results reveal that the carbonate content in the tills in this noncarbonate area is high enough to date by AMS, that the carbon in the coatings on the newly exposed roche moutons and in the modern till is modern carbon and so the 14 C dating results in the ancient till can represent the actual ages of the till formation, and that the warm period during the Holocene began as early as 6 500 a B.P. and lasted to 1 800 a B.P. | Chaolu Yi Kexing Liu Zhijiu Cui | 1998 | Chinese Science Bulletin1998，43，20： | 15 |
| 2 | Triboelectric behaviors of materials under high speeds and large currents显示文摘Using special testers,the triboelectric behaviors of several materials were investigated in this paper under the conditions of high speeds and large currents.The obtained results revealed that the tribological behaviors and current-conducting characteristics have complicated interrelationships.Worsening in the servicing conditions can obviously deteriorate the tribological as well as electrical behaviors;high sliding speeds and large electrical currents can worsen the tribological and electrical conductivity properties,while an appropriate contact pressure can benefit the electrical contact properties.Further analyses reveal that the worsening effects of the above factors,such as frictional heat,arc discharge,arc heat,and surface morphology,result in poor triboelectric contact performance.Among these,the electric arc is one of the most serious factors,because the occurrence of an electric arc may cause severe oxidation,melting,and roughening of the contact surface,thereby causing deterioration in the current-conducting quality as well as material loss. | Yongzhen ZHANG Zhenghai YANG Kexing Song Xianjuan PANG Bao SHANGGUAN | 2013 | Friction2013，1，3： | 12 |
| 3 | The discovery of early Permian reef belt in east Kunlun and its significance显示文摘The early permian reef belt is distributed in the southern side of eastern Kunlun, north area of Qinghai-Tibet Plateau. The core-reef facies of the reef extends from Tuosuo Lake to Huashixia. Lots of reef breccia was found at the southern slope of the core-reef belt, and to the north of the reef belt there is back-reef limestone. Cacisponges, hydrozoa, bryozoa, Tabulozoa, Tubiphytes and red algae are the main frame-building organisms. Archaeolithoporella, laminated blue-green algaes, Tabulozoa and Tubiphytes played a role of binding or encrustating. There are many kinds of epibiont in the reef, including brachiopod, gasteropod, foraminifera, echinoderm and simple coral. The type and the characteristics of the reef-building organisms in eastern Kunlun and Animaqing are basically the same as those in the south of | Wang Yongbiao Zhang Kexing Gong Yiming Zhang Zhi Luo Mansheng | 1998 | Chinese Science Bulletin1998，43，11： | 10 |
| 4 | Identification of microRNA transcriptome reveals that miR-100 is involved in the renewal of porcine intestinal epithelial cells显示文摘MicroRNAs play important roles in various cellular processes, including differentiation, proliferation and survival. Using a pig model, this study sought to identify the miRNAs responsible for crypt-villus axis renewal of the small intestinal epithelium.Compared to the villus upper cells, there were 15 up-regulated and 41 down-regulated miRNAs in the crypt cells of the jejunum.Notably, we found that miR-100 was expressed more in the villus upper cells than in the crypt cells, suggesting an effect on intestinal epithelium differentiation. Overexpression of miR-100 increased the activity of alkaline phosphatase, confirming that miR-100 promoted IPEC-J2 cell differentiation. MiR-100 can inhibit cell proliferation as evidenced by CCK-8 and cell cycle assay results. We also showed that miR-100 significantly inhibited the migration of IPEC-J2 cells and promoted cell apoptosis through caspase-3-dependent cleavage of Bcl-2. Furthermore, FGFR3 was identified as a potential target of miR-100 by bioinformatics analysis. We confirmed that overexpression of miR-100 suppressed FGFR3 expression in IPEC-J2 cells by directly targeting the FGFR3 3′-UTR. This is the first report of miRNAs acting on the renewal of the intestinal crypt-villus axis.Our results also showed that miR-100 promotes the differentiation and apoptosis, and inhibits the proliferation and migration of enterocytes of pigs. | Lijun Zou Xia Xiong Huansheng Yang Kexing Wang Jian Zhou Dinghong Lv Yulong Yin | 2019 | Science China(Life Sciences)2019，62，6： | 9 |
| 5 | Synergistic Effects of Chiral Morphology and Reconfiguration in Cattail Leaves显示文摘 | Zilong Zhao Weixi Huang Bingwei Li Kexing Chen Kuifu Chen Hongping Zhao Xiqiao Feng | 2015 | Journal of Bionic Engineering2015，12，4： | 3 |
| 6 | Effects of strain rates on dynamic deformation behavior of Cu-20Ag alloy显示文摘Copper alloy is widely used in high-speed railway,aerospace and other fields due to its excellent electrical conductivity and mechanical properties.High speed deformation and dynamic loading under impact load is a complex service condition,which widely exists in the field of national defense,military and industrial application.Therefore,the dynamic deformation behavior of the Cu-20Ag alloy was investigated by Split Hopkinson Pressure Bar(SHPB)with the strain rates of 1000-25000 s^(-1),high-speed hydraulic servo material testing machine with the strain rates of 1-500 s^(-1).The effect of strain rate on flow stress and adiabatic shear sensitivity was analyzed.The results show that the increase of strain rate will increase the flow stress and critical strain,that is to say,the increase of strain rate will reduce the adiabatic shear sensitivity of the Cu-20Ag alloy.The Cu-Ag interface has obvious orientation relationship with;(111)_(Cu)//(111)_(Ag):(^(-)111)_(Cu)//(^(-)111)_(Ag):(^(-)200)_(Cu)//(^(-)200)_(Ag) and [0^(-)11]_(Cu)//[0^(-)11]_(Ag) with the increase of strain rate.The increase of strain rate promotes the precipitation of Ag and increases the number of interfaces in the microstructure,which hinders the movement of dislocations and improves the stress and yield strength of the Cu-20Ag alloy.The concentration and distribution density of dislocations and the precipitation of Ag were the main reasons improve the flow stress and yield strength of the Cu-20Ag alloy. | Kexing Song Yongfeng Geng Yijie Ban Yi Zhang Zhou Li Xujun Mi Jun Cao Yanjun Zhou Xuebin Zhang | 2021 | Journal of Materials Science & Technology2021，，20： | 3 |
| 7 | Internal oxidation of dilute Cu-Al alloy powers with oxidant of Cu2O显示文摘 | Xing Jiandong Dong Qiming | 2004 | Materials Science and Engineering2004，380，1： | 1 |
| 8 | Internal oxidation of dilute Cu-A1 alloy powders with oxidant of CuzO显示文摘 | Song Kexing Xing Jiandong Dong Qiming | 2004 | Mater Sci Eng A2004，380，： | 1 |
| 9 | Thermal expansion behavior of MgO/Cu composite with lower MgO volume fraction显示文摘 | Xiuhua Guo Kexing Song Shuhua Liang Cuihua Zheng | 2012 | Materials Research Bulletin2012，，11： | 1 |
| 10 | Internal oxidation of dilute Cu-Al alloy powers with oxidant of Cu2O显示文摘 | Kexing Song Jiandong Xing Qiming Dong etc | 2004 | Materials Science and Engineering A2004，，380： | 1 |
| 11 | Cu-10Sn-4Ni-3Pb Alloy Prepared by Crystallization Under Pressure: An Experimental Study显示文摘The wear-resistant tin bronze (Cu-10Sn-4Ni-3Pb) with tin content above 8 wt.% prepared by traditional melting and casting process usually defects such as low density, poor properties and segregations. The crystallization under pressure processing of Cu-10Sn-4Ni-3Pb alloy was investigated. The microstructures were observed and analyzed and compared with that by traditional melting and casting process. The results show that the dendrite has obviously disappeared and the dendritic segregation alleviated by using the crystallization under 680 MPa pressure process, in comparison with the remarkably dendrite microstructure and severe as-cast defects of alloy prepared by traditional melting and casting technology. Based on the experimental study, the properties and microstructures of Cu-10Sn-4Ni-3Pb tin bronze prepared by crystallization under pressure have been improved significantly. | Kexing SONG Yanjun ZHOU Peifeng ZHAO Yanmin ZHANG Ning BAI | 2013 | Acta Metallurgica Sinica(English Letters)2013，26，2： | 1 |
| 12 | A passive wavelength demodulation system for guided-wav Bragg grating sensors 显示文摘 | Liu Kexing Measures Raymond M | 1992 | IEEE Photo Tech Lett1992，4，5： | 1 |
| 13 | Internal oxidation of dilute Cu - Al alloy powers with oxidant of Cu2O显示文摘 | Song Kexing Xing Jiandong Dong Qiming | 2004 | Materials Science and Engineering2004，380，1： | 1 |
| 14 | Coordinated grain boundary deformation governed nanograin annihilation in shear cycling显示文摘Grain growth and shrinkage are essential to the thermal and mechanical stability of nanocrystalline metals,which are assumed to be governed by the coordinated deformation between neighboring grain boundaries(GBs)in the nanosized grains.However,the dynamics of such coordination has rarely been reported,especially in experiments.In this work,we systematically investigate the atomistic mechanism of coordinated GB deformation during grain shrinkage in an Au nanocrystal film through combined stateof-the-art in situ shear testing and atomistic simulations.We demonstrate that an embedded nanograin experiences shrinkage and eventually annihilation during a typical shear loading cycle.The continuous grain shrinkage is accommodated by the coordinated evolution of the surrounding GB network via dislocation-mediated migration,while the final grain annihilation proceeds through the sequential dislocation-annihilation-induced grain rotation and merging of opposite GBs.Both experiments and simulations show that stress distribution and GB structure play important roles in the coordinated deformation of different GBs and control the grain shrinkage/annihilation under shear loading.Our findings establish a mechanistic relation between coordinated GB deformation and grain shrinkage,which reveals a general deformation phenomenon in nanocrystalline metals and enriches our understanding on the atomistic origin of structural stability in nanocrystalline metals under mechanical loading. | Yingbin Chen Qishan Huang Qi Zhu Kexing Song Yanjun Zhou Haofei Zhou Jiangwei Wang | 2021 | Journal of Materials Science & Technology2021，，27： | 1 |
| 15 | Blockade of LIGHT/HVEM and B7/CD28 Signaling Facilitates Long-Term Islet Graft Survival With Development of Allospecific Tolerance显示文摘 | Kexing Fan Hao Wang Huafeng Wei Qian Zhou Geng Kou Sheng Hou Weizhu Qian Jianxin Dai Bohua Li Yanyun Zhang Tongyu Zhu Yajun Guo | 2007 | Transplantation2007，，6： | 1 |
| 16 | Adsorption-controlledgrowthofBiMnO3 films by molecular-beam epitaxy显示文摘 | LeeJH KeX MisraR etal | 2010 | AppliedPhysicsLetters2010，96，26： | 1 |
| 17 | Particle kinet- ics and physical mechanism of microemulsion polymeriza- tion of octamethylcyclotetrasiloxane显示文摘 | ZHUANG YQ KEX ZHAN XL | 2010 | Powder Technol- ogy2010，201，： | 1 |
| 18 | Microstructure and properties at elevated temperature of a nano-Al 2 O 3 particles dispersion-strengthened copper base composite显示文摘 | Baohong Tian Ping Liu Kexing Song Yan Li Yong Liu Fengzhang Ren Juanhua Su | 2006 | Materials Science & Engineering A2006，，： | 1 |
| 19 | Fiber-optic interferometric sensor for the detection of acoustic emission within composite materials 显示文摘 | Liu Kexing | 1990 | Optics Letters1990，15，22： | 1 |
| 20 | Internal oxidation of dilute Cu-Al alloy powers with oxidant of Cu2O显示文摘 | Song Kexing Xing Jiandong Dong Qingming | 2004 | Materials Science and Engineering2004，380，： | 1 |
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