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| 1 | Variational Calculus With Conformable Fractional Derivatives显示文摘Invariant conditions for conformable fractional problems of the calculus of variations under the presence of external forces in the dynamics are studied. Depending on the type of transformations considered, different necessary conditions of invariance are obtained. As particular cases, we prove fractional versions of Noether's symmetry theorem. Invariant conditions for fractional optimal control problems, using the Hamiltonian formalism, are also investigated. As an example of potential application in Physics, we show that with conformable derivatives it is possible to formulate an Action Principle for particles under frictional forces that is far simpler than the one obtained with classical fractional derivatives. | Matheus J.Lazo Delfim F.M.Torres | 2017 | IEEE/CAA Journal of Automatica Sinica2017，4，2： | 4 |
| 2 | Kinetics of thermal de-chlorination of PVC under pyrolytic conditions显示文摘 | Alexandra Castro Delfim Soares Candida Vilarinho Fernando Castro | 2012 | Waste Management2012，，： | 1 |
| 3 | Frequency do- main analysis of acoustic wave propagation in heterogeneous media considering iterative coupling procedures between the method of fundamental solutions and Kansa's method 显示文摘 | Delfim S J Luis G Andreia P Cleberson D | 2012 | Inter- national Journal for Numerical Methods in Engineering2012，89，7： | 1 |
| 4 | Financial globalization, convergence and growth: The role of foreign direct investment显示文摘 | Delfim Gomes Neto Francisco José Veiga | 2013 | Journal of International Money and Finance2013，，： | 1 |
| 5 | Approximation of fractional integrals by means of deriva- tives显示文摘 | Shakoor P Ricardo A Delfim F M T | 2012 | Computer Math Appl2012，64，13： | 1 |
| 6 | Control of a novel chaotic fractional order system using a state feedback technique显示文摘 | Abolhassan Razminia Delfim F M | 2013 | Mechatronics2013，，23： | 1 |
| 7 | Financial globalization,convergence and growth: The role of foreign direct investment显示文摘 | Delfim Gomes Neto Francisco Jose Veiga | 2013 | Journal ofInternational Money and Finance2013，，37： | 1 |
| 8 | A Conjugate Gradient Method with Global Convergence for Large-Scale Unconstrained Optimization Problems显示文摘 | Shengwei Yao Xiwen Lu Zengxin Wei Delfim Soares | 2013 | Journal of Applied Mathematics2013，，： | 1 |
| 9 | Kinetics of thermal de-chlorination of PVC under pyrolytic conditions 显示文摘 | Alexandra Castro Delfim Soares Cgndida Vilarinho | 2012 | Waste Management2012，32，5： | 1 |
| 10 | Monitoring Urban Quality of Life: The Porto Experience显示文摘 | Luis Delfim Santos Isabel Martins | 2007 | Social Indicators Research2007，，2： | 1 |
| 11 | Kinetics of thermal de-chlorination of PVC under pyrolytic conditions显示文摘 | Alexandra Castro Delfim Soares CndidaVilarinho Fernando Castro | 2012 | Waste Management2012，32，5： | 1 |
| 12 | Employment, pay and diserimination in the tourism industry 显示文摘 | Santos Luis Delfim Varejfio Joso | 2007 | Tourism E- conomies2007，13，2： | 1 |
| 13 | Prevalence of adenovirus and rotavirus infection in immunocompromised patients with acute gastroenteritis in Portugal显示文摘AIM: To characterize the prevalence of rotavirus(RV) and adenovirus(Ad V) infections in immunocompromised patients with acute gastroenteritis. METHODS: The presence of RV and Ad V(serotypes 40 and 41) was evaluated in 509 stool samples obtained between January 2009 and December 2010 from 200 immunocompromised patients(83 females and 117 males; median age 21 years old, range 0-72. The diagnosis of infection was performed as a routine procedure and the presence of RV and Ad V(serotypes 40 and 41) was determined by immunochromatography using the RIDA® Quick Rota-Adeno-Kombi kit(r-Biopharm, Darmstadt, Germany). The data analysis and description of seasonal frequencies were performed using computer software IBM® SPSS®(Statistical Package for Social Sciences) Statistics version 20.0 for Mac. The frequencies of infection were compared into different age and gender groups by χ2 test.RESULTS: The study revealed 12.4% Ad V positive samples and 0.8% RV positive samples, which correspond to a prevalence of 6.5% and 1.5%, respectively. Ad V was more frequent between October 2009 and April 2010, while RV was identified in April 2010 and July 2010. The stool analysis revealed that from the 509 samples, 63(12.4%) were positive for Ad V and 4(0.8%) positive for RV, which by resuming the informationof each patient, lead to an overall prevalence of Ad V and RV of 6.5%(13/200 patients) and 1.5%(3/200 patients), respectively. The stratification of the analysis regarding age groups showed a tendency to an increased prevalence of infection in paediatric patients between 0-10 years old. Considering the seasonal distribution of these infections, our study revealed that Ad V infection was more frequent between October 2009 and April 2010, while RV infection was characterized by two distinct peaks(April 2010 and July 2010). CONCLUSION: The overall prevalence of Ad V and RV infection in immunocompromised patients with acute gastroenteritis was 8% and Ad V was the most prevalent agent. | Joana Ribeiro Delfim Ferreira Célia Arrabalde Sandra Almeida Inês Baldaque Hugo Sousa | 2015 | World Journal of Virology2015，4，4： | 1 |
| 14 | Constrained Fractional Variational Problems of Variable Order显示文摘Isoperimetric problems consist in minimizing or maximizing a cost functional subject to an integral constraint.In this work, we present two fractional isoperimetric problems where the Lagrangian depends on a combined Caputo derivative of variable fractional order and we present a new variational problem subject to a holonomic constraint. We establish necessary optimality conditions in order to determine the minimizers of the fractional problems. The terminal point in the cost integral,as well as the terminal state, are considered to be free, and we obtain corresponding natural boundary conditions. | Dina Tavares Ricardo Almeida Delfim F.M.Torres | 2017 | IEEE/CAA Journal of Automatica Sinica2017，4，1： | 1 |
| 15 | Approximation of fractional integrals by means of derivatives显示文摘 | Shakoor P Ricardo A Delfim F M T | | 0，，13： | 1 |
| 16 | Mathematical Modelling, Simulation, and Optimal Control of the 2014 Ebola Outbreak in West Africa显示文摘 | Amira Rachah Delfim F. M. Torres Sanling Yuan | 2015 | Discrete Dynamics in Nature and Society2015，，： | 1 |
| 17 | Financial Globalization, Convergence and Growth : The Role of Foreign Direct Investment显示文摘 | Delfim Gomes Neto Francisco Jos6 Veiga | 2013 | Journal of International Money and Finance2013，37，10： | 1 |
| 18 | 妊娠合并海洋性贫血145例临床分析显示文摘在1994年10月~1995年9月之间,澳门仁伯爵医院共有145名海洋性贫血的妇女分娩,其中88名是α-海洋性贫血,57名是β-海洋性贫血。海洋性贫血占总的分娩人数的3.6%。结果显示:妊娠可以使得部分海洋性贫血的贫血情况加重,其中约9.1%的海洋性贫血妇女需要输血。这145名海洋性贫血妇女的分娩方式、母亲并发症以及围产儿预后情况与同期对照组妇女相比没有区别。其中有2例Hb Bart’s胎儿水肿综合征在孕28周以前被诊断并予引产。本文还对各种类型海洋性贫血的发生机理和对母亲、胎儿的影响进行探讨。 | 孙静 段涛 邵敬於 Delfim Ferreria | 2003 | 中国临床医学2003，10，1： | 1 |
| 19 | Kinetics of Thermal De-chlorination of PVC Under Pyrolytic Conditions显示文摘 | Alexandra Castro Delfim Soares C ndida Vilarinho | 2012 | Waste Management2012，32，5： | 1 |
| 20 | ISOPERIMETRIC PROBLEMS OF THE CALCULUS OF VARIATIONS WITH FRACTIONAL DERIVATIVES显示文摘In this article,we study isoperimetric problems of the calculus of variations with left and right Riemann-Liouville fractional derivatives.Both situations when the lower bound of the variational integrals coincide and do not coincide with the lower bound of the fractional derivatives are considered. | Ricardo Almeida Rui A.C.Ferreira Delfim F.M.Torres | 2012 | Acta Mathematica Scientia2012，32，2： | 0 |
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