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| 1 | Damage evolution and dynamic response of cement asphalt mortar layer of slab track under vehicle dynamic load显示文摘The damage evolution and dynamic performance of a cement asphalt(CA)mortar layer of slab track subjected to vehicle dynamic load is investigated in this paper.Initially,a statistical damage constitutive model for the CA mortar layer is developed using continuous damage mechanics and probability theory.In this model,the strength of the CA mortar elements is treated as a random variable,which follows the Weibull distribution.The inclusion of strain rate dependence affords considering its influence on the damage development and the transition between viscosity and elasticity.Comparisons with experimental data support the reliability of the model.A three-dimensional finite element(FE)model of a slab track is then created with the commercial software ABAQUS,where the devised model for the CA mortar is implemented as a user-defined material subroutine.Finally,a vertical vehicle model is coupled with the FE model of the slab track,through the wheel-rail contact forces,based on the nonlinear Hertzian contact theory.The evolution of the damage and of the dynamic performance of the CA mortar layer with various initial damage is investigated under the train and track interaction.The analysis indicates that the proposed model is capable of predicting the damage evolution of the CA mortar layer exposed to vehicle dynamic load.The dynamic compressive strain,the strain rate,and the induced damage increase significantly with an increase in the initial damage,whereas the dynamic compressive stress exhibits a sharp decrease with the increasing initial damage.Also,it is found that the strain rate dependence significantly influences the damage evolution and the dynamic behavior of the CA mortar layer. | ZHU ShengYang FU Qiang CAI ChengBiao SPANOS Pol D | 2014 | Science China(Technological Sciences)2014，57，10： | 19 |
| 2 | Clinical significance of main pancreatic duct dilation on computed tomography: Single and double duct dilation显示文摘AIM: To study the patients with main pancreatic duct dilation on computed tomography (CT) and thereby to provide the predictive criteria to identify patients at high risk of significant diseases, such as pancreatic cancer, and to avoid unnecessary work up for patients at low risk of such diseases. METHODS: Patients with dilation of the main pancreatic duct on CT at Emory University Hospital in 2002 were identified by computer search. Clinical course and ultimate diagnosis were obtained in all the identified patients by abstraction of their computer database records. RESULTS: Seventy-seven patients were identified in this study. Chronic pancreatitis and pancreatic cancer were the most common causes of the main pancreatic duct dilation on CT. Although the majority of patients with isolated dilation of the main pancreatic duct (single duct dilation) had chronic pancreatitis, one-third of patients with single duct dilation but without chronic pancreatitis had pancreatic malignancies, whereas most of patients with concomitant biliary duct dilation (double duct dilation) had pancreatic cancer. CONCLUSION: Patients with pancreatic double duct dilation need extensive work up and careful followup since a majority of these patients are ultimately diagnosed with pancreatic cancer. Patients with single duct dilation, especially such patients without any evidence of chronic pancreatitis, also need careful follow-up since the possibility of pancreatic malignancy, including adenocarcinoma and intraductal papillary mucinous tumors, is still high. | Mark D Edge Maarouf Hoteit Amil P Patel Xiaoping Wang Deborah A Baumgarten Qiang Cai | 2007 | World Journal of Gastroenterology2007，13，11： | 9 |
| 3 | The influence of impurity on the critical thickness of the CeO_2 buffer layer for coated conductors显示文摘The lattice parameters, band structure, density of state and elastic constant of RE-doped CeO2 (RE=Sm, Gd, Dy), the buffer material for coated HTS conductors, are calculated using the plane-wave method with pseudopotentials based on the density functional theory (DFT) of first-principle. The rule and mechanism of the effect of rare earth impurity on the critical thickness of the CeO2 buffer layer are investigated. It is found that, in the range of the calculation, the changes of the lattice volume V and elastic constant E of CeO2 with the impurity are mainly determined by the increased electrons ne of the system. The relationship of the elastic constant E and increased electrons ne is established. It is indicated that the critical thickness of the CeO2 single buffer layer doped with Sm, Gd, and Dy may be enhanced by 22%, 43% and 33%, respectively. | PAN Min1, HUANG Zheng2, MA HuanFeng2, QIANG WeiRong2, WEI LianFu1, WANG Long2 & ZHAO Yong1,3 1 Key Laboratory of Magnetic Levitation Technologies and Maglev Trains (Ministry of Education of China), Superconductivity R&D Center (SRDC), Southwest Jiaotong University, Chengdu 610031, China 2 School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China 3 Superconductivity Research Group, School of Materials Science and Engineering, University of New South Wale, Sydney, 2052 NSW, Australia | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，7： | 3 |
| 4 | Power-Efficient Cross-Layer De- sign for OFDMA Systems with Heteroge- neous QoS, Imperfect CS显示文摘 | ZARAKOVITIS C C QIANG Ni SKORDOULIS D E | 2012 | [EEE Transactions on Ve- hicular Technology2012，61，2： | 1 |
| 5 | Disinfection of swine wastewater using chlorine, ultraviolet light and ozone 显示文摘 | Macauley J J Qiang Z Adams C D | 2006 | Water research2006，40，10： | 1 |
| 6 | A study of segregation mech- anism in centrifugal cast high speed steel rolls 显示文摘 | Fu H G Qiang Q Xing J D | 2008 | Materi- als Science and Engineering A2008，479，： | 1 |
| 7 | A study on the crack control of a high-speed steel roll fabricated by a centrifugal casting technique 显示文摘 | Fu H G Qiang Q Xing J D | 2008 | Materials Science and Engineering A2008，474，12： | 1 |
| 8 | A physical short-channel threshold voltage model for undoped symmetric double-gate MOSFETs显示文摘 | Qiang C Harrell E M I Meindl J D | 2003 | IEEE Transactions on Electron Devices2003，50，7： | 1 |
| 9 | Widening of the tropical belt in a changing climate显示文摘 | Seidel D J Fu Qiang Randel W J | 2008 | Nature Geoscience2008，，1： | 1 |
| 10 | A randomized, controlled trial of postoperative adjuvant eytokine-indueed killer cells immunotherapy after radical resection of hepatocellular car- cinoma 显示文摘 | HUI D QIANG L JIAN W | 2009 | Dig Liver Dis2009，41，1： | 1 |
| 11 | In the Eye of the Beholder: A Survey of Models for Eyes and Gaze 显示文摘 | Hansen D W Qiang Ji | 2010 | IEEE Transactions on Pattern Analysis and Machine Intelligence (S0162-8828)2010，32，3： | 1 |
| 12 | A randomized,controlled trial of post- operative adjuvant cytokine-induced killer cells immunotherapy after radical resection of hepatocellular carcinoma显示文摘 | Hui D Qiang L Jian W | 2009 | Dig Liver Dis2009，41，1： | 1 |
| 13 | CETP gene mutation (D442G) increases low-density lipoprotein particle size in patients with coronary heart disease显示文摘 | Wang J Qiang H Chen D Zhang C Zhuang Y | 2002 | Clin Chim Acta2002，322，12： | 1 |
| 14 | Ureteroscopic Treatment of Ureteral Calculi with Holmium:YAG Laser Lithotripsy显示文摘 | Haowen J Zhong W Qiang D | 2007 | J Endourol2007，21，2： | 1 |
| 15 | A randomized, controlled trial of postoperative adjuvant cytokine-induced killer ceils immunotherapy after radical resection of hepatocellular carcinoma显示文摘 | Hui D Qiang L Jian W | 2009 | Dig Liver Dis2009，41，1： | 1 |
| 16 | Life cycle assessment on polylactide-based wood plastic composites toughened with polyhydroxyalkanoates 显示文摘 | QIANG T YU D M ZHANG A J | 2014 | Journal of Cleaner Production2014，66，： | 1 |
| 17 | Chloride bind- ing of cement-based materials subjected to external chloride environment-A review 显示文摘 | Qiang Yuan Caijun Shi Geert De Schutter et d | 2009 | Construction and Building Materials2009，23，： | 1 |
| 18 | A novel microstrip bandpass fitler with two cascaded PBG structures 显示文摘 | QIANG R WANG Y Y CHEN D X | 2001 | IEEE MTT-S Digest2001，，1： | 1 |
| 19 | In the eye of the beholder: A survey of models for eyes and gaze 显示文摘 | HANSEN D W QIANG J | 2010 | IEEE Transac- tions on Pattern Analysis and Machine Intelligence2010，32，3： | 1 |
| 20 | Therapeutic potential of human mesenchymal stem cells producing IL-12 in a mouse xenograft model of renal cell carcinoma显示文摘 | Peng G Qiang D Zhong W | 2009 | Cancer Letter2009，290，2： | 1 |
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