نتایج جستجو برای: digital
تعداد نتایج: 307822 فیلتر نتایج به سال:
The aim of this paper is to compute a simplicial cohomology group of some specific digital images. Then we define ringand algebra structures of a digital cohomology with the cup product. Finally, we prove a special case of the Borsuk-Ulam theorem fordigital images.
Increasing interest is being shown in the use of microprocessor for protection, switching and data acquisition required in modern high voltage substations. One of the most difficult functions to fulfill is that of transmission line distance protection employing samples of the voltage and current waveform taken from high voltage transducer equipment at the usual relaying point. This paper examin...
objective: when none of digital systems and scanners is accessible and it is essential to have digitized images of conventional radiographs, digital cameras can be used. the aim of this study was to investigate whether digital images obtained by different resolutions of a digital camera are matched to the original radiographs in evaluation of caries. methods: in this diagnostic accuracy in vitr...
The main solution to the problems of persistency and uniqueness in identification of digital objects in a web environment is provided by using digital identifiers instead of URL. The main basis of this solution is resolution mechanism that is used in digital identifier systems. Resolution is the use of indirect names instead of URLs; what worked for the DNS (Domain Name System) in stabilizing i...
Objective: Diagnosis of vertical root fractures (VRFs) is critical in endodontics which most of the times occurs in endodontically treated teeth with root canal fillings such as gutta percha. Despite Cone Beam Computed Tomography (CBCT) has significantly enhanced image quality compared to digital radiography (DR) which aid the diagnosis, artifacts has remained as a problem in VRF detection . ...
Objectives- To determine normal circulatory pattern of distal limbs of goat to be used for comparison with diseased digits or hooves of small ruminant lameness examination.Design- Experimental study.Animals- Forelimbs and hindlimbs of 10 healthy goats of both sexes, were collected fresh immediately after slaughter.Procedures- The plantar and Palmar artery were dissected and catheterized by eigh...
Filters are particularly important class of LTI systems. Digital filters have great impact on modern signal processing due to their programmability, reusability, and capacity to reduce noise to a satisfactory level. From the past few decades, IIR digital filter design is an important research field. Design of an IIR digital filter with desired specifications leads to a no convex optimization pr...
Now Persian digital resources allocate very little volume in digital libraries. This shows some problems. Therefore the main objective of this study is to identify e-lending issues in digital libraries from the viewpoints of Iranian electronic publishers. Quantitative approach with Analytical survey method was used in this study. 21 electronic publishers were studied by researcher-made question...
introduction: a study model is a precise three dimensional replica of patient’s dentition and plays an important role in treatment planning. many digital multi-media applications have become available to the clinician and his or her staff to facilitate standard procedures in practice and management. the aim of this study is to evaluate reliability and validity of dental measurement made on digi...
objective: in the this research, effective factors on digital libraries’ development in central libraries of public universities in tehran have been identified from these libraries administrator’s view.method: this study is applied, based on descriptive-analytical method. for data collection we used researcher-made questionnaire, based on the digital library federation definition (including hum...
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