Introducing Collaborative Multiple-Student Single-Teacher for Online Learning

Knowledge distillation is a popular method where a large trained network (teacher) is implemented to train a smaller network (student). To decrease the need for training a much larger network (teacher) for real time application, one student self-knowledge distillation was introduced as a solid technique for compressing neural networks especially for real time applications. However, most of the existing methods consider only one type of knowledge and apply one-student one-teacher learning strategy.This thesis presents a collaborative multiple-student single-teacher system (CMSST). The proposed approach is based on real time applications that contain temporal information, which play an important role in understanding. We designed a backbone old student network with target complexity for deployment, during training, once the old student provides high-quality soft labels to guide the hierarchical new student, it also offers the opportunity for the new student to make meaningful improvements based on the students’ revised feedback via the shared intermediate representations. Moreover, we introduced soft target label smoothing technique to the CMSST.Experimental results showed that the accuracy can be improved on newly developed teacher knowledge distillation by 1.5% on the UCF-101. Also the accuracy was improved by 1.15% compared to normal huge teacher knowledge distillation on CIFAR100 dataset

Incidence of hepatitis Gvirus in patients with hematological malignancies withrepeated blood transfusion

Background: Hepatitis G virus and GB virus C (GBV-C

High Prevalence of Antimicrobial Resistance among Gram Negative Bacteria Isolated from Poultry

Background: Multidrug resistant bacteria (MDR), such as Escherichia coli and Salmonella spp. are threat to the human health care system. In recent years, these MDR bacteria have been found increasingly inside and outside the hospital environment. Food animals (meat and poultry) are increasingly colonized with MDR bacteria, thus posing an additional concern. This study is intended to determine susceptibility and resistance pattern of pathogenic Gram negative bacteria isolated from rectal swabs of chicken against 16 antibiotics. Methods: A total of 216 cloacal swab samples (Gaza strip poultry farms) and 87 frozen and fresh meat samples (from slaughter houses and retails) from June 2017 to June 2018 were collected. Isolation and identification of organisms were achieved using standard bacteriological techniques. Antimicrobial susceptibility test was performed according to standard protocols. Results: 360 Enterobacteriaceae isolates, and 56 Gram-negative non fermenter were recovered. The predominant Enterobacteriaceae isolate was Citrobacter spp. (22.6%), followed by Enterobacter spp. (17.6%) and E. coli (16.5%). High rates of resistance against Ampicillin (85.4%) and Trimethoprim/ Sulfamethoxazole (80.1%) followed by Chloramphenicol (74%) were recorded. Six samples were positive for Salmonella spp. and Shigella spp. Of the tested Enterobacteriacae isolates, 94.7% were multidrug resistant (MDR), and 31.4% of  None fermenting bacilli (NFB) were MDR. Carbapenem resistance was found to be high among isolates; 51.9% for imipenem and 1.8% for meropenem. Conclusion: Isolated bacteria in the study area were MDR and this suggests that chickens may be important reservoir of antimicrobial resistant organisms which is a major public health concern.   &nbsp

Contribution to the Control of Electric Power Assisted Steering System

La commande du système de Direction Assistée Electrique (DAE) est un défi majeur en raison de ses multiples objectifs et de la nécessitée de réaliser plusieurs mesures pour la mettre en oeuvre. La commande doit assurer : le suivi du couple d’assistance de référence tout en assurant la stabilité du système et sans introduire des retards, l’atténuation des vibrations provoquées par chacune des entrées du système, la transmission des informations de la route au conducteur pour un bon confort et une meilleure sensation de conduite, l’amélioration de la performance de retour au centre. La commande doit également être robuste vis-à-vis des erreurs de modélisation, des incertitudes des paramètres, et des perturbations extérieures. En outre, la mise en oeuvre de la commande nécessite plusieurs mesures telles que : l’angle au volant, l’angle du moteur, la vitesse du moteur, le couple conducteur et le couple de réaction de la route.The control of Electric Power Assisted Steering (EPAS) system is a challengingproblem due to the multiple objectives and the need of several pieces of information to implement the control. The control objectives are to generate assist torque with fast responses to driver’s torque commands, insure system stability, attenuate vibrations, transmit the road information to the driver, and improve the steering wheel returnability and free control performance. The control must also be robust against modeling errors and parameter uncertainties. In addition, several pieces of information are required to implement the control, such as steering wheel angle, motor velocity, driver torque and road reaction torque

Current Control and Active Damping for Single Phase LCL-Filtered Grid Connected Inverter

LCL filter has been widely used in the grid connected inverter, since it is effective in attenuation of the switching frequency harmonics in the inverter. However, the resonance in this filter causes stability problems and must be damped effectively to achieve stability. There are some methods to damp the resonance; one method is passive damping of resonance by adding a series resistor with the filter capacitor, but passive element reduces the inverter efficiency. Other method uses active damping (AD) by adding a proportional control loop of filter capacitor current, but this method needs additional sensor to measure filter capacitor current; moreover, when the control loops are digitally implemented, the computation delay in AD control loop will lead to some difficulties in choosing control parameters and maintaining system stability. This paper presents current control scheme for the grid connected inverter with the LCL filter. The proposed scheme ensures the control of injected current into grid with AD of the resonance in the LCL filter while keeping system stability and eliminating the effect of computation delay of the AD loop. An estimation of filter capacitor current with one step ahead is performed using the discrete time observer based on measuring the injected current. This reduces the cost and increases the robustness of the system. Proportional Resonant (PR) controller is used to control the injected current. Design of control system and choosing its parameters are studied and justified in details to ensure suitable performance with adequate stability margins. Simulation and experimental results show the effectiveness and the robustness of the proposed control scheme

Real time control via a high order sliding mode controller of a multi-cellular converter

In this paper, we present a multi-cellular converter connected to a DC motor (DCM). We show its importance in the practical implementation of a (super twisting) control algorithm derived using the second order sliding mode technique. The validity of the controller is shown experimentally using a laboratory set-up

Assessment of side effects of venesection (phlebotomy) procedure in Iraqi patients presenting with erythrocytosis: single center experience

Background : Venesection or phlebotomy is generally considered to be a safe method, but occasionally adverse effects of varying severity may occur during or at the end of the procedure. Objectives : The aim of the study was to estimate the frequency and type of adverse events occurring during venesection and to assess the practices which would help to minimize them. Materials and methods : This is prospective single-center study was conducted from October 2011 to November 2012 at the emergency unit of the national center of hematology in Baghdad. All phlebotomies procedures made at the center were analyzed. All adverse events occurring during or at the end of procedure were registered by using a standardized questionnaire. Results : Overall 3 adverse events were reported in relation to 960 venesections done, resulting in an overall adverse event rate of 0.3125%, that is, an incidence of 1 in every 320 venesections. One adverse effect was presyncopal symptoms of mild intensity, and the other two that observed were extravasation at site of puncture. Conclusions : Only 0.3% of phlebotomies were complicated by adverse events which were very mild and easily managed. Our study confirms the fact that venesection procedure is a very safe method which could be made even more event-free by following certain friendly, reassuring and competent practices