نتایج جستجو برای: stability lobe
تعداد نتایج: 357095 فیلتر نتایج به سال:
INTRODUCTION The analytical stability lobe diagram offers a predictive capability for selecting stable chip width-spindle speed combinations in machining operations [1-4]. However, the increase in allowable chip width provided at spindle speeds near integer fractions of the system’s dominant natural frequency is diminished substantially at low spindle speeds where the stability lobes are closel...
epilepsy is the third most common chronic brain disorder which is characterized by an enduring predisposition to generate seizures. mesial temporal lobe epilepsy (mtle) is the most common type of refractory epilepsy. increasing evidence indicates that neuroinflammation plays a critical role in the pathogenesis of mtle. hundreds of micro-rnas have been found to be abnormally expressed in epilept...
in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...
antenna structures with low side lobe levels are normally the main goal during antenna design. in this paper, a new method for reduction of radiation pattern side lobe level in phased array antenna with uniform and non-uniform weighting is presented. in this method, by changing the array elements weight or adding several elements, such as slc technique, the pattern with low side lobe level can ...
abstract aim and background: evaluation of cognition is fundamental for every comprehensive epilepsy program. we sought to conduct this study to assess memory state of patients with refractory temporal lobe epilepsy before decision for epilepsy surgery. method and materials: in a case-control study, 20 patients with right temporal lobe epilepsy and 20 patients with left temporal lobe epilepsy w...
the ramifications of the portal vein in the liver of horses were studied by using corrosion casting and gross dissection. the portal vein in the horse supplies the hepatic lobes by six major branches. the right lobe is supplied by three main branches, namely the dorsal diaphragmatic, the right caudodorsal and the right intermediate branches. the left branch supplies the left lateral and medial ...
in this research, we have computationally investigated a mechanism for antiepileptic drugs (aed) and proposed bumetanide as a possible temporal lobe epilepsy (tle) treatment. experimentally it is difficult and devastating to determine the ionic mechanisms of depolarizing currents. it is obvious that chlorine and potassium transients are challenging to isolate pharmacologically and much γ-aminob...
chess is considered as a cognitive game because of severe engagement of the mental resources during playing. the purpose of this study is evaluation of frontal lobe function of chess players with matched non-players. wisconsin card sorting test (wcst) data showed no difference between the player and non-player groups in preservation error and completed categories but surprisingly showed signifi...
background epilepsy, a well-known mostly idiopathic neurologic disorder, has to be correctly diagnosed and properly treated. up to now, several diagnostic approaches have been processed to determine the epileptic focus. objectives the aim of this study was to discover whether proton-mr-spectroscopic imaging (mrsi) aids in the diagnosis of temporal lobe epilepsy in conjunction with classical ele...
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