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| 1 | Optimization of high-speed railway pantographs for improving pantograph-catenary contact显示文摘A crucial system for the operation of high-speed trains is the pantograph catenary interface as it is the sole responsible to deliver electrical power to the train. Being the catenary a stationary system with a long lifespan it is also less likely to be redesigned and upgraded than the pantographs that fit the train vehicles. This letter proposes an optimization procedure for the improvement of the contact quality between the pantograph and the catenary solely based on the redesign of the pantograph head suspension characteristics. A pantograph model is defined and validated against experimental dynamic characteristics of existing pantographs. An optimization strategy based on the use of a global optimization method, to find the vicinity of the optimal solution, followed by the use of a deterministic optimization algorithm, to fine tune the optimal solution, is applied here. The spring stiffness, damping characteristics and bow mass are the design variables used for the pantograph optimization. The objective of the optimal problem is the minimization of the standard deviation of the contact force history, which is the most important quantity to define the contact quality. The pantograph head suspension characteristics are allowed to vary within technological realistic limits. It is found that current high-speed railway pantographs have a limited potential for mechanical improvements, not exceeding 10%-15% on the decrease of the standard deviation of the contact force. | Jorge Ambrósio Joo Pombo Manuel Pereira | 2013 | Theoretical & Applied Mechanics Letters2013，3，1： | 15 |
| 2 | NOTES transvaginal cholecystectomy: preliminary clinical application显示文摘 | R. Zorron L. C. Maggioni L. Pombo A. L. Oliveira G. L. Carvalho M. Filgueiras | 2008 | Surgical Endoscopy2008，，2： | 5 |
| 3 | Autophagy Induction by the Pathogen Receptor CD46显示文摘 | Pierre-Emmanuel Joubert Grégory Meiffren Isabel Pombo Grégoire Guillemette Pontini Clémence Richetta Monique Flacher Olga Azocar Pierre-Olivier Vidalain Marc Vidal Vincent Lotteau Patrice Codogno Chantal Rabourdin-Combe Mathias Faure | 2009 | Cell Host & Microbe2009，，4： | 2 |
| 4 | Pancreatic tuberculosis: CT findings显示文摘 | Pombo F Diaz Candamio M J Rodriguez E | 1998 | Abdom Imaging1998，23，4： | 1 |
| 5 | Association between bone mineral density and polymorphisms of the VDR, ERalpha,COL1A1 and CTR genes in Spanish postmenopausal women 显示文摘 | Bandres E Pombo I Gonzalez-Huarriz M | 2005 | J Endocrinol Invest2005，28，4： | 1 |
| 6 | Left ventricular volumes and ejection fraction by echocardiography 显示文摘 | Pombo J F Troy B L Russell R O Jr | 1971 | Circulation1971，43，4： | 1 |
| 7 | Salted and fermented fish processes evaluation 显示文摘 | Pombo C R Marsico E T Franco R M | 2009 | International Journal of Food Science & Technology2009，44，11： | 1 |
| 8 | Immunity to malaria after administration of ultra-low doses of red cells infec- ted with Plasmodium falciparum 显示文摘 | Pombo DJ Lawrence G Hirunpetcharat C | 2002 | Lancet2002，360，9333： | 1 |
| 9 | Reference genes for normalization of gene expression studies in human osteoarthritic articular cartilage显示文摘 | Pombo S M Calaza M Gomez R J J | 2008 | BMC Mol Biol2008，9，： | 1 |
| 10 | The definition and treatment of pediatric subtrochanteric femur fractures with titanium elastic nails显示文摘 | Pombo MW Shilt JS | 2006 | J Pediatr Orthop2006，26，3： | 1 |
| 11 | Further evidence of the role of frizzled - related protein gene polymorphisms in osteoarthritis显示文摘 | Rodriguez - Lopez J Pombo - Suarez M Liz M | 2007 | Ann Rheum Dis2007，8，： | 1 |
| 12 | Machining evalua- tion of a hybrid MQL - CO2 grinding technology显示文摘 | Sanchez J A Pombo I Alberdi R | 2010 | Journal of Cleaner Production2010，18，18： | 1 |
| 13 | Immunity to malaria after administration of ultra-low doses of red cells infected with Plasmodium falciparum显示文摘 | Pombo DJ Lawrence G Hirunpetcharat C | 2002 | Lancet2002，360，9333： | 1 |
| 14 | Immunogenicity in mice of anthrax recombinant protective antigen in the presence of aluminum adjuvants 显示文摘 | Berthold I Pombo ML Wagner L et ol | 2005 | Vaccine2005，23，6： | 1 |
| 15 | Multicystic fibrolamellar hep- atocellular carcinoma/CT appearance 显示文摘 | Pombo F Rodriguez E Arnal M F | 1993 | Clin Imaging1993，17，1： | 1 |
| 16 | The definition and treatment of pediatric sub- troehantcric femar fractures with titanium elastic nail 显示文摘 | Pombo MW Shih JS | 2006 | J Pediatr Orthop2006，26，3： | 1 |
| 17 | Heme oxygenase-1 expression enhances vascular endothelial resistance to complement-mediated injury through induction of decay-accelerating factor: a role for increased bilirubin and ferritin 显示文摘 | Kinderlerer A R Pombo Gregoire I Hamdulay S S | 2009 | Blood2009，113，： | 1 |
| 18 | Peritoneal tuberculosis versus peritoneal carcinomatosis: distinction based on CT findings显示文摘 | Rodriguez E Pombo F | 1996 | J Comput Assist Tomogr1996，20，5： | 1 |
| 19 | Influence of the aerodynamic forces on the pantograph-catenary system for high-speed trains显示文摘 | POMBO J AMBROSIO J PEREIRA M | 2009 | Vehicle System Dynamics2009，47，11： | 1 |
| 20 | On the dynamic behaviour of structural elements carrying elastically mounted,concentrated masses显示文摘 | Laura P A A Susemihl E A Pombo J L | 1977 | Applied Acoustics1977，10，2： | 1 |
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