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| 1 | DYNAMIC FRACTURE ANALYSIS OF AGED GLASSY POLYCARBONATE BY THE METHOD OF CAUSTICS显示文摘The purpose of this work is to investigate the dynamic fracture properties of glassy polycarbonate(PC) with diferent aging times. The optical method of caustics is adopted in which the shadow spot patterns are recorded by a high speed camera during the dynamic fracture process.Then, the dynamic crack propagation, the stress intensity factor(SIF) and the dynamic fracture toughness of aged PC are obtained through an analysis of the characteristic size of caustic pattern.Moreover, by combining with the investigation of the fracture surface and the energy release rate analysis, the influence of aging time on the dynamic fracture behavior is discussed. Results show that the dynamic fracture toughness and critical energy release rate of PC decreases with aging time for short aging times, whereas they have little change or even increase for longer aging times.Therefore, aging modifies the mechanical properties especially the dynamic fracture properties of PC nonlinearly, not linearly as generally thought of. | Guiyun Gao Zheng Li Mehrdad Negahban | 2013 | Acta Mechanica Solida Sinica2013，26，5： | 2 |
| 2 | Sinonasal clear cell adenocarcinoma: a case report显示文摘 | NEGAHBAN S DANESHBOD Y KHAI)EMI B | 2009 | Acta Cytol2009，53，： | 1 |
| 3 | Assessment and improvement of integrated HSE and macro-ergonomics factors by fuzzy cognitive maps:the case of a large gas refinery显示文摘 | Asadzadeh S M Azadeh A Negahban A Sotoudeh A | | 0，，4： | 1 |
| 4 | Malignant adeno- myoepithelioma of the breast: a review显示文摘 | Ahmadi N Negahban S Aledavood A | 2015 | Breast J2015，21，3： | 1 |
| 5 | Joint support recovery under high-dimensional scaling:benefits and perils of l0,∞-regularization显示文摘 | Negahban S Wainwright M J | 2008 | Advances in Neural Information Processing Systems2008，21，： | 1 |
| 6 | Primary bilateral Burkitt lymphoma of the lactating breast:a case report and review of the literature显示文摘 | Negahban S Ahmadi N Oryan A | 2010 | Mol Diagn Ther2010，14，4： | 1 |
| 7 | Fumigant toxicity of essential oil from Artemisia sieberi Besser against three stored-product insects显示文摘 | Negahban M Moharramipour S Sefidkon F | 2007 | Journal of Stored Products Re- search2007，43，2： | 1 |
| 8 | Spatial and temporal variability of soil nitrate and corn yiehl : Muhi- fracta| anaysis显示文摘 | Eghball B Schepers J S Negahban M | 2003 | Agron J2003，95，2： | 1 |
| 9 | A unifed framework for high-dimensional analysis ofM-estimators with decomposable regularizers 显示文摘 | Negahban S Ravikumar P Wainwright M Yu B | 2012 | Statistical Science2012，27，4： | 1 |
| 10 | Primary bilateral Burkitt lymphoma of the lactating breast : a case report and review of the literature显示文摘 | Negahban S Ahmadi N Oryan A | 2010 | Mol Diagn Ther2010，14，4： | 1 |
| 11 | Spatial and temporal variability of soil nitrate and corn yield显示文摘 | Scheper E Negahban J S Schlemmer M | 2003 | Agronomy Journal2003，95，2： | 1 |
| 12 | Noisy matrix decomposition via convex relaxation: Optimal rates in high dimensions 显示文摘 | Alekh Agarwal Sahand Negahban Martin J Wainwright | 2012 | The Annals of Statistics2012，40，2： | 1 |
| 13 | Primary spinal epidural non- Hodgkin lymphoma demonstrated by FDG PET/CT 显示文摘 | Ho L Valenzuela D Negahban A | 2010 | Clin Nucl Med2010，35，7： | 1 |
| 14 | Primary spinal epiduralnon-Hodgkin lymphoma demonstrated by FDG PET/ CT 显示文摘 | Ho L Valenzuela D Negahban A | 2010 | Clin Nucl Med2010，35，7： | 1 |
| 15 | Social networking on smartphones: When mobile phones become addictive显示文摘 | Salehan M Negahban A | 2013 | Computers in Human Behavior2013，29，6： | 1 |
| 16 | Primary bilateral Burkitt lympboma of the lactating breast: a case report and review of the literature 显示文摘 | Negahban S Ahmadi N Oryan A | 2010 | Mol Diagn Ther2010，14，4： | 1 |
| 17 | A hybrid computer simulation-artificial neural network algorithm for optimisation of dispatching rule selection in stochastic Job-Shop scheduling problems显示文摘 | AZADEH A NEGAHBAN A MOGHADDAM M | 2012 | International Journal of Production Research2012，50，2： | 1 |
| 18 | 各向异性脆性材料动态断裂的实验研究显示文摘通过引入了正交各向异性动态裂纹尖端应力场,结合焦散线方法理论,得到正交各向异性材料的应力强度因子和裂纹长度随时间的变化以及材料的动态断裂韧度。通过选用经过压缩变形后呈现明显的各向异性的聚碳酸酯(PC),研究了不同压缩变形处理下PC材料的动态断裂性能,验证实验方法的可靠性。实验结果表明,对于相同压缩变形的试件,沿着塑性压缩方向的断裂韧度大于垂直于塑性压缩方向的各向同性面内的断裂韧度;随着压缩变形的增加,材料断裂韧度增强。该方法适用于非透明材料,可以推广到各向异性岩石等脆性材料的动态断裂问题研究。 | 高桂云 励争 NEGAHBAN M | 2018 | 岩石力学与工程学报2018，37，A02： | 1 |
| 19 | Spatial and temporal variability of soil nitrate and corn yield: multifraetal analysis显示文摘 | Eghball B Schepers J S Negahban M | 2003 | Agron J2003，95，2： | 1 |
| 20 | Spatial and temporal variability of soil nitrate and corn yield: Multifractal analysis 显示文摘 | Eghball B Schepers J S Negahban M | 2003 | Agronomy Journal2003，95，2： | 1 |
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