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| 1 | Use of antibiotics in broiler production:Global impacts and alternatives显示文摘Antibiotics are used to fight bacterial infections.However, a selective pressure gave rise to bacteria resistant to antibiotics.This leaves scientists worried about the danger to human and animal health.Some strategies can be borrowed to reduce the use of antibiotics in chicken farms.Much research has been carried out to look for natural agents with similar beneficial effects of growth promoters.The aim of these alternatives is to maintain a low mortality rate, a good level of animal yield while preserving environment and consumer health.Among these, the most popular are probiotics, prebiotics, enzymes,organic acids, immunostimulants, bacteriocins, bacteriophages, phytogenic feed additives, phytoncides,nanoparticles and essential oils. | Youcef Mehdi Marie-Pierre Létourneau-Montminy Marie-Lou Gaucher Younes Chorfi Gayatri Suresh Tarek Rouissi Satinder Kaur Brar Caroline Cté Antonio Avalos Ramirez Stéphane Godbout | 2018 | Animal Nutrition2018，，2： | 19 |
| 2 | On the Controllability of an Advection-diffusion Equation with Respect to the Diffusion Parameter:Asymptotic Analysis and Numerical Simulations显示文摘The advection-diffusion equation y_t~ε-εy_(xx)~ε+ M y_x~ε= 0,(x, t) ∈(0, 1) ×(0, T) is null controllable for any strictly positive values of the diffusion coefficient ε and of the controllability time T. We discuss here the behavior of the cost of control when the coefficient ε goes to zero, according to the values of T. It is actually known that this cost is uniformly bounded with respect to ε if T is greater than a minimal time T_M, with T_M in the interval [1, 2×3^(1/2)]/M for M > 0 and in the interval [2×2^(1/2), 2(1 +3^(1/2))]/|M | for M < 0. The exact value of TM is however unknown.We investigate in this work the determination of the minimal time T_M employing two distincts but complementary approaches. In a first one, we numerically estimate the cost of controllability, reformulated as the solution of a generalized eigenvalue problem for the underlying control operator, with respect to the parameter T and ε. This allows notably to exhibit the structure of initial data leading to large costs of control. At the practical level, this evaluation requires the non trivial and challenging approximation of null controls for the advection-diffusion equation. In the second approach, we perform an asymptotic analysis, with respect to the parameter ε, of the optimality system associated to the control of minimal L^2-norm. The matched asymptotic expansion method is used to describe the multiple boundary layers. | Youcef AMIRAT Arnaud MNCH | 2019 | Acta Mathematicae Applicatae Sinica2019，35，1： | 18 |
| 3 | DFIG sliding mode control fed by back-to-back converter with DC-link voltage control for variable wind turbine PWM speed显示文摘 | Youcef BEKAKRA Djilani BEN ATTOUS | 2014 | Frontiers in Energy2014，8，3： | 7 |
| 4 | Effects of selenomethionine on acute toxicities from concurrent chemoradiation for inoperable stage Ⅲ nonsmall cell lung cancer显示文摘AIM: To prospectively determine the safety and tolerability of oral L-selenomethionine(SLM) with concurrent chemoradiation(CCRT) for Stage Ⅲ non-small cell lung cancer(NSCLC) and estimate if the incidence and/or severity of adverse events could be reduced by its use.METHODS: Sixteen patients with stage Ⅲ NSCLC were accrued to this single arm, phase Ⅱ study. CCRT consisted of radiation given at 2 Gy per fraction for 30-33 fractions, 5 d per week with concurrent weekly Ⅳ paclitaxel 50 mg/m2 followed by carboplatin dosed at an area under the time-concentration curve of 2. SLM was dosed in a loading phase at 4800 μg twice daily for one week prior to CCRT followed by once daily dosing during treatment. RESULTS: No selenium-related toxicity was observed. Analysis revealed grade 3 or higher esophagitis in 3 of 16 patients(19%), pneumonitis in 0, leukopenia in 2(12.5%), and anemia in 1(6%); the latter two were significantly reduced when compared to the protocolstated expected rate of 35%(P = 0.045 for leukopenia, and P < 0.01 for anemia). Median overall survival was 14.9 mo and median failure-free survival was 9 mo(95%CI: 3.3-21.5).CONCLUSION: There may be some protective benefit of selenium in the setting of CCRT for inoperable NSCLC. The data suggests decreased rates of myelosuppression when compared to similarly-treated historical and contemporary controls. Further evaluation of selenium in this setting may be warranted. | Michael Mix Nithya Ramnath Jorge Gomez Charles de Groot Saju Rajan Shiva Dibaj Wei Tan Youcef Rustum Michael B Jameson Anurag K Singh | 2015 | World Journal of Clinical Oncology2015，6，5： | 4 |
| 5 | Mechanical and Metallurgical Characterization of HSLA X70Welded Pipeline Steel Subjected to Successive Repairs显示文摘The aim of this work is to study the influence of successive weld repairs on the microstructure and the mechanical behavior of the heat-affected zone(HAZ) of an HSLA X70 steel. Detailed microstructural examination combined to grain size measurement showed that beyond the second weld repair, the microstructure of the HAZ undergoes significant change in the grain morphology and grain growth. The results of the X-ray diffraction analyzed using MAUD software indicated an increase in the crystallite size and a decrease in the dislocation density according to the number of weld repair operations. Consequently, a loss of mechanical properties, namely the yield strength and the toughness with the number of weld repairs, was recorded. Beyond the second weld repair operation, the properties of the welded joint do not fulfill the standards applied in piping industry. | Bouzid Maamache Mabrouk Bouabdallah Abdelhalim Brahimi Youcef Yahmi Billel Cheniti Brahim Mehdi | 2016 | Acta Metallurgica Sinica(English Letters)2016，29，6： | 2 |
| 6 | Effect of Agitator’s Types on the Hydrodynamic Flow in an Agitated Tank显示文摘The aim of this paper is to study the effect of agitator’s types on the turbulent flows in stirred tanks without and with baffles.The hydrodynamics behavior induced by four different agitator’s types:a Rushton turbine(RT),a circular blade turbine(CBT),a diverging triangular blade turbine(DTBT)and converging triangular blade turbine(CTBT)are numerically predicted by solving the Navier-Stokes equations and RNGκ–εturbulent model.The simulations are carried out using the Multi Reference Frame(MRF)approach.The numerical results showed good agreement with experiment.We find that the agitator CTBT gives an important profit on the power consumption per report/ratio the others and DTBT give a good reduction of the vortex size of the impeller angles. | Mohammed Foukrach Mohamed Bouzit Houari Ameur Youcef Kamla | 2020 | Chinese Journal of Mechanical Engineering2020，33，2： | 2 |
| 7 | Global review and synthesis of trends in observed terrestrial near-surface wind speeds: Implications for evaporation显示文摘 | Tim R. McVicar Michael L. Roderick Randall J. Donohue Ling Tao Li Thomas G. Van Niel Axel Thomas Jürgen Grieser Deepak Jhajharia Youcef Himri Natalie M. Mahowald Anna V. Mescherskaya Andries C. Kruger Shafiqur Rehman Yagob Dinpashoh | 2011 | Journal of Hydrology2011，，： | 2 |
| 8 | 辅助生殖技术的研究进展显示文摘 | 李慕军 Youcef Khoudja Rabea 李柳铭 | 2005 | 广西医科大学学报2005，22，3： | 2 |
| 9 | 添加TiO_2和ZrO_2对火焰热喷涂Al_2O_3涂层性能的影响(英文)显示文摘采用火焰热喷涂技术在低碳钢表面上沉积制备添加25%ZrO_2(简称AZ-25)和3%TiO_2(简称AT-3)增强体的Al_2O_3涂层,对涂层的显微组织、相组成、显微硬度和摩擦学性能进行了研究。X射线衍射(XRD)结果表明,AT-3涂层的主要相组成为α-Al_2O_3,此外还含有一些亚稳的β-Al_2O_3和κ-Al_2O_3相。而AZ-25涂层的主要相组成为α-Al_2O_3,还有一些q-ZrO_2和m-ZrO_2相。在大多数实验条件下,AT-3涂层的摩擦学性能(摩擦因数、磨损率)均比AZ-25涂层要好。添加ZrO_2增强体会导致涂层的显微硬度降低,而添加TiO_2会使涂层硬度增加。 | Rassim YOUNES Mohand Amokrane BRADAI Abdelhamid SADEDDINE Youcef MOUADJI Ali BILEK Abderrahim BENABBAS | 2016 | Transactions of Nonferrous Metals Society of China2016，26，5： | 2 |
| 10 | Effect of the Inclination of Baffles on the Power Consumption and Fluid Flows in a Vessel Stirred by a Rushton Turbine显示文摘The role of baffles in mechanically stirred tanks is to promote the stability of power drawn by the impeller and to avoid the fluid swirling, thus enhancing mixing. The present paper numerically investigates the baffles effects in a vessel stirred by a Rushton turbine. The geometric factor of interest is the baffle inclination which is varying between 25°, 32.5°, 45°, 70° and 90° at different impeller rotational speeds. The impeller rotational direction has also been varied. The vortex size and power consumption were evaluated for each geometrical configuration. It was found that the best configuration is the baffle inclination by α = 70° at a negative angular velocity. | Youcef Kamla Mohamed Bouzit Houari Ameur Mohammed Ilies Arab Abdessalam Hadjeb | 2017 | Chinese Journal of Mechanical Engineering2017，30，4： | 2 |
| 11 | Vision -based navigation of unmanned aerial vehicles 显示文摘 | Jonathan Courbon Youcef Mezouar Nicolas Guehard | 2010 | Control engineering practice2010，18，7： | 1 |
| 12 | GMRES:A generalized minimal residual algorithm for solving nonsymmetric linear systems 显示文摘 | YOUCEF SAAD MARTIN H SCHULTZ | 1986 | Society for Industrial and Applied Mathematics1986，7，3： | 1 |
| 13 | Mobilization of CD34^+CD38^- hematopoietic stem cells after priming in acute myeloid leukemia显示文摘AIM: To evaluate quantitatively and qualitatively the different CD34+cell subsets after priming by chemotherapy granulocyte colony-stimulating factor(± G-CSF)in patients with acute myeloid leukemia.METHODS: Peripheral blood and bone marrow sampleswere harvested in 8 acute myeloid leukemia patients during and after induction chemotherapy. The CD34/CD38 cell profile was analyzed by multi-parameter flow cytometry. Adhesion profile was made using CXC chemokine receptor 4(CXCR4)(CD184), VLA-4(CD49d/CD29) and CD47.RESULTS: Chemotherapy ± G-CSF mobilized immature cells(CD34+CD38 population), while the more mature cells(CD34+CD38lowand CD34+CD38+populations) decreased progressively after treatment. Circulating CD34+cells tended to be more sensitive to chemotherapy after priming with G-CSF. CD34+cell mobilization was correlated with a gradual increase in CXCR4 and CD47expression, suggesting a role in cell protection and the capacity of homing back to the marrow.CONCLUSION: Chemotherapy ± G-CSF mobilizes into the circulation CD34+bone marrow cells, of which, the immature CD34+CD38-cell population. Further manipulations of these interactions may be a means with which to control the trafficking of leukemia stem cells to improve patients' outcomes. | Adriana Plesa Eve Mattei Charles Dumontet Youcef Chelghoum Hélène Labussière Giovanna Cannas Mauricette Michallet Xavier Thomas Mohamed Elhamri Stéphane Morisset Inès Tagoug | 2013 | World Journal of Stem Cells2013，5，4： | 1 |
| 14 | Human adipose- derived stromal cells efficiently support hematopoiesis in vitro and in vivo: a key step for therapeutic studies显示文摘 | De Toni F Poglio S Youcef AB | 2011 | Stem Cells Dev2011，20，12： | 1 |
| 15 | Analysis of linear time invariant systems with time delay显示文摘 | Youcef T K Reddy S | 1992 | Journal of Dynamic Systems Measurements and Control Transactions of ASME1992，114，： | 1 |
| 16 | Path planning for robust image-based control显示文摘 | Youcef M Chaumette F | 2002 | IEEE Transactions on Robotics and Automation2002，18，4： | 1 |
| 17 | Statistical bivariate modelling of wind using first-order Markov chain and Weibull distribution 显示文摘 | Youcef E F Sauvageot H Adane A E H | 2003 | Renewable Energy2003，28，11： | 1 |
| 18 | ILUT:A Dual Threshold Incomplete LU Factorization显示文摘 | YOUCEF S | 1994 | Numer linear Algebra Appl1994，1，4： | 1 |
| 19 | GMRES: A generalized minimal residual algorithm for solving nonsymmetric linear systems显示文摘 | Martin H Schultz | 1986 | SIAM J Sci Stat Comput1986，，7： | 1 |
| 20 | Convergence theory of nonlinear Newton-Kryiov algorithms显示文摘 | Brown Peter N Saad Youcef | 1994 | SLAM Journal on Optimization1994，4，2： | 1 |
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