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تعداد نتایج: 8841676 فیلتر نتایج به سال:
some new water-soluble schiff base complexes of na2[m(5-so3-1,2-salophen)].nh2o; (5-so3-1,2-salophen = n,n’-bis(5-sulphosalicyliden)-1,2-phenylendiamine); na2[m(5-so3-2,3-salpyr)(h2o)n].2h2o; (5-so3-2,3-salpyr = n,n’-bis(5-sulphosalicyliden)-2,3-diaminopyridine); and na2[m(5-so3-3,4-salbenz)(h2o)n].nh2o; (5-so3-3,4-salbenz = n,n’-bis(5-sulphosalicyliden)-3,4-diaminobenzophenon); where m = cu, n...
due to the limiting workspace of parallel manipulator and regarding to finding the trajectory planning of singularity free at workspace is difficult, so finding a best solution that can develop a technique to determine the singularity-free zones in the workspace of parallel manipulators is highly important. in this thesis a simple and new technique are presented to determine the maximal singula...
the purpose of this study was to examine the status of supervision on departments’ heads at ferdowsi university of mashhad (fum) and realize some applied themes to provide a fit model for supervising departments’ heads in fum. the method was case study under a research category aimed for applied one. using purposive sampling, interviews were conducted with top fum managers, head departments, an...
abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...
weinlagen.Info ist eine Webseite für Leute, denen es nicht egal ist, wo der Wein wächst, den sie trinken. Die geografische Information zu Weinlagen war aber bisher online nicht vorhanden. Weinlagen.Info liefert nun über Google-Maps Umrisse und Positionen der Lagen. Der Content wird nach dem Wikipedia-Prinzip erstellt und steht kostenlos zur Verfügung. Nutzer sind der Endverbraucher und jeder de...
this study was aimed to assess wheat-grown fields health in gharessoo basin, golestan province, iran, using 79 fields in 8 villages in 2010. the samples were taken by quadrates. the number and the type of weeds were recorded at genera and species levels. in parallel, management data were recorded by questionnaire. species richness was defined as species number and shannon-wiener index, simpson’...
Mars topographic data, such as digital orthophoto maps (DOMs) and digital elevation models (DEMs) are essential to planetary science and exploration missions. The main objective of our study is to generate a higher resolution DEM using the Mars Express (MEX) High Resolution Stereo Camera (HRSC). This paper presents a novel pixel-level image matching method for HRSC linear pushbroom imagery. We ...
Visualizing Topography by Openness:A New Application of Image Processing to Digital Elevation Models
A new parameter, here termed openness, expressing the degree of dominance or enclosure of a location on an irregular surface, is developed to visualize topographic character. Openness is an angular measure of the relation between surface relief and horizontal distance. For angles less than 90", it is equivalent to the internal angle of a cone, its apex at a DEM location, constrained by neighbor...
Modeling the environment is an essential capability for autonomous robots. To navigate and manipulate without direct human control, autonomous robots must sense the environment, model the environment, and plan and execute actions based on information from the model. Perceiving and mapping rugged terrain from multiple sensor data is an important problem for autonomous navigation and manipulation...
determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...
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