e present a simplified dual-channel discrimination model with spatio-temporal filters to represent the t s visual system contrast sensitivity, and masking based on local spatio-temporal contrast energy. The contras ensitivity filter parameters of the model were based on previous work. The masking and global sensitivity h t parameters are calibrated to masking data using brief grating target sig...

The most commonly-used mode of imaging in the scanning transmission electron microscope (STEM) has made use of the annular dark-field (ADF) detector. Recently, however, there has been increased interest in bright-field (BF) modes. By reciprocity, a small BF detector with collection angles that are about an order of magnitude smaller than the convergence angle of the probe (see Fig. 1) provides ...

~urol Neurosurg 1ge: clinical and complications, but the monitoring methods must be simple to perform, sensitive, and reliable. Median nerve somatosensory evoked potential (SEP) monitoring fulfills these criteria. Between 1985 nd 1990, we performed 994 h S. Successful operations of the carotid artery with SEP monitoring. In 92% of the cases, we were able t obtain viable SEP tracings. 3.. Case r...

Simulation models are often used to support decision naking for problems \vith uncertain inputs and pararneers. Three types of models are used: deterministic. risk. md uncertainty models. Risk models are popular \\'ith 'esearchers, but can be used only \\Then the joint probabilty distribution of the inputs and parameters is kno\vn. In nany real-life situations~ hov,rever, this is not the case. ...

S N INCE THE INCEPTION of positron emission tomography (PET) several decades ago, PET canner design and performance have improved ramatically. The number of detector elements has ncreased from 20 to 20,000 and the axial field f view from 2 to 20 cm, the spatial resolution as improved from 25 to 5 mm, and the ensitivity has increased 1000-fold.1,2 At the ame time, the clinical applications of PE...

The reliability and sensitivity analyses of stator blade regulator usually involve complex characteristics like high-nonlinearity, multi-failure regions, small failure probability, which brings in unacceptable computing efficiency accuracy the current analysis methods. In this case, by fitting implicit limit state function (LSF) with active Kriging (AK) model reducing candidate sample pool adap...

abstract background and aim: consider ing based on the presence or absence of swelling of the optic disc, optic neuritis classified nto two types of anterior and retrobulbar optic neuritis. the aim of this study was to compare the visual functions of patients with anterior optic neuritis and retrobulbar optic neuritis. materials and methods:this cross-sectional study was conducted in 48 patient...

یکی از جذاب ترین روش های ماشینکاری مدرن، تخلیه الکتریکی است که در اواخر دهه 1960 معرفی شد. با سیم کاربردهای مختلفی دارد، جمله دقت بالا تمام مواد رسانا مانند فلزات، آلیاژهای فلزی، گرافیت و سرامیک همچنین صنایع هوافضا، خودروسازی سایر صنایع. به منظور افزایش سرعت کاهش زبری سطح عرض شکاف، پارامترهای برش بهینه نقش مهمی انتخاب خروجی دارند. این مطالعه، ورودی (دبی، مدت پالس، فرکانس سیم، کشش جریان دی الکتر...